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Second is the first PET plastic bottle waste on non-PET bottle, seat bottom, label and other impurities mechanically separated, then washed, crushed, granulated. Recycled PET shall not contain PVC impurities, otherwise it will affect the color of PET.

Can be separated by artificial means when a relatively small amount when PVC is mixed on a conveyor belt, namely that when the torque effect of PVC and PET plastic bottles have different melting points in different part of the force will be broken by PET and PVC fragments containing a heater and temperature conveyor control, PVC after being melt-adhered on the conveyor belt, so that the PET can be separated.

Tag beverage bottle after bottle broken can be separated with a blower and cyclone combination device removed. Also preclude the separation means separating column by pumping, crushing PET debris from the top of the vertical separation column, debris countercurrent updraft formed using PET label debris difference in specific gravity, the label is removing, PET separator from the bottom up, in order to guarantee label separation efficiency in production may preclude the use of two or more separate devices.

PET washing debris is very important. 80-100 ℃ washed often preclude the use of hot water to soften or dissolve the adhesive labels and the base of EVA adhesive or other types of adhesive, in order to prevent re-adhesion of the adhesive off the PET flakes, the water required additives, e.g. alkali, emulsifiers or other special chemical agents.


Cleaning fluid is generally determined by the factory waste bottle according to the source and the adhesive properties of the composition and the content of their formulations, recycled washing liquid can be filtered off after reheating impurities, in particular cleaning washing tank equipped with a stirrer were, in order to ensure cleaning effect, washing may preclude use secondary washing process.

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Effect of injection molding and blow molding processes: You must ensure uniform thickness distribution of the bottle, get a good stretch, this may form explosive bottles is reduced.
CO2 content is too high: some have been filled soda bottle when the CO2 content, the inner pressure increases with increasing temperature, but PET bottles to withstand the limited capacity (about 10 ~ 20kg / cm2), if the bottle pressure too high, the bottom will accelerate bottle burst occurred in a polar medium effect, generally bottle suitable CO2 content of 4.0 to 4.3 times.
Chain lubricant effect: Because most soft drink production process using chain lubricant, and chain lubricant in contact with the PET bottle a long time, the impact of PET bottles is relatively large. It is therefore crucial chain lubricant selection, which must be dedicated PET bottle lubricant. If the pH is too high chain lubricant (strongly alkaline) or low (strongly acidic) on PET bottles are disadvantageous, preferably close to neutral (pH = 7). PET under basic hydrolysis reaction conditions are likely to occur. Glass and PET bottles for shared lines, since the glass lubricant (pH = 12) pH high, so before into PET bottles, the production line must be cleaned, clean drinking water should be used. When using PET chain lubricant, must strictly follow the concentration provided the use of concentration can not be too high, water thermos bottle machine should be changed frequently in order to maintain a low pH water thermos machine inside.
Dew point temperature: In the summer, air humidity, the higher the dew point temperature, so warm bottle machine speed is not too fast, thermos bottle machine temperature is set too low, thermos bottle outlet temperature above the dew point temperature of the product is easy to 2 ℃, but soda water temperature should not exceed 27 ℃ to avoid affecting the soda taste. If the temperature is below the dew point temperature soda, soda crates, more humid packaging, resulting in the role of chain lubricant in contact with the bottom a long time, prone to burst bottles phenomenon. Particularly the use of shrink film packaging, but also to pay attention to. Water on thermos bottle machine: Experience has shown that, when the high alkalinity of water thermos bottle machine, met consecutive wet summers, it may lead to a large number of PET bottles bottle burst. So we need to reduce the total alkalinity of water thermos bottle machine to 50mg / kg (CaCO3) or less. Soda stack height effects: soda stack height should not be too high, generally 5 boxes per pallet high, stacked two pallets.
Affect the storage environment: soda storage and transportation process not exposure. Soda storage environment should not be too high, generally require storage temperature is below 35 ℃, the product within the storage warehouse should be ventilated, should be kept dry inside the warehouse.

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In China and coastal areas south of the Yangtze annual average relative humidity of 85%, in some areas in the spring and summer may be as high relative humidity above 90%, in a high humidity environment, PET hygroscopic maximum saturation humidity.
The higher the moisture content, Ⅳ greater decline in the value of the PET. Take A04,104, it is worth noting that the water content of 0.01%, the intrinsic viscosity of 0.72 and a water content of 0.02% when the intrinsic viscosity becomes 0.63. At 180 ℃ drying time is reduced due 3 / 4h, decreased intrinsic viscosity 0.09.
The longer the drying time, the lower the PET raw material in the water, but can also cause excessive drying PET degradation. When heated to 180 ℃ when, for a maximum initial moisture content of 0.3% of the raw material, fell to 0.14 percent moisture; drying 4h available 0.004% moisture content, which is the upper limit of the preform to control moisture content. 5.2 PET bottle storage and transport
Since PET has performance easily absorb water, therefore preforms, bottles longer storage time will absorb moisture from the air more, so as to gradually reduce the original fine performance. High-temperature, high-humidity environment will directly affect the use of the bottle. Based on the foregoing, we recommend PET bottles in the spring and summer relative humidity ≥85%, ≥35 ℃ lower temperature conditions, the storage period should be controlled within one month; in the autumn and winter, relative humidity <85%, lower temperature <35 ℃ condition storage period should be controlled within three months, the length of the storage period should take account of local weather conditions.
5.3 How to reduce the loss of CO2 PET bottles
(1) CO2 loss pathway PET bottles
By bottle leakage: If the gap between the molecules filled PET CO2 molecule, CO2 molecules will leak out from the bottle, CO2 leakage rate and degree of orientation of biaxially oriented PET, bottle thickness, humidity and pressure.
PET material absorption of CO2: Because porous molecular structure of PET (less dense), making CO2 molecules to penetrate, resulting in absorption phenomenon.

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 Currently, PET production in the country's development is very fast, with an annual output capacity has reached number one billion, has become carbonated drinks, mineral water, edible oil and other primary containers. 2, the characteristics of raw materials and PET bottles PET 2.1 PET structure
PET belongs to the organic polymer compound is composed of carbon, hydrogen, oxygen three elements. Molecular structure such as
By:! H- [OCH2CH2-OOC - CO -OHPET generally consists of terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) direct esterification or transesterification reaction generating PET monomer, and then after the formation of the solid phase polycondensation of polyethylene terephthalate. Chemical reaction equation is as follows: HOOC - COOH + 2HOCH2CH2OH "catalyst base HO-CH2CH2-OOC - COO-CH2CH2OH + 2H2O 2.2 PET physical properties
PET way into the polymerization homopolymer and copolymer PET, use is divided into textile PET, bottle grade PET and sheet grade PET. The physical properties are shown in Table 1 bottle grade PET. Table 1 bottle grade PET physical performance characteristics of the No. Item Value Unit 1 Density 1.4 kg / cm3
2 average molecular weight of 25000 ~ 30000 3 IV value of 0.70 to 0.85
4 melting point of 250 ~ 260 ℃ 5 AA content ≤3 mg / Kg 6 Moisture ≤0.4%
7 particle shape cylindrical or parallelepiped
PET hygroscopic, require specific warehousing, before the drying process to be effective. Residues in the production of raw materials and injection molding process difficult to deal with the release of acetaldehyde make PET bottles. 2.3 Performance biaxially stretched PET bottle
(1) has a good light transmittance and gloss, light transmittance is greater than 85%; (2) has good mechanical properties and impact resistance; (3) good chemical resistance;
(4) at room temperature (20 ~ 30 ℃) has good dimensional stability; (5) light weight;
(6) of the gas have good barrier properties. Chemical properties of 2.4 PET

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Do not need frequent replacement due to high temperatures caused by the aging of the hose.

4. As the hot filling is a high level or full bottle filling, the bottle is to be transported in an ordinary transport gas bottles and PET bottles different, with card bottle conveying technology, to avoid the traditional
Star wheel dial PET bottle to bottle and squeeze bottle material cause spillover phenomenon.

5. PET bottle cleaning and disinfection system

(1) Before the infeed screw equipped with a red bottle sterilizing apparatus, rinse with disinfectant bottle.
(2) washer rinse bottle wall, irrigation and disinfection with disinfectant or sterile water. (3) on the intake rinser star wheel and into the capping machine star wheel are provided with the bottle washing device, one of the threaded portion of the bottle sterilization, the second is the threaded portion of the bottle clean materials, substance over a period of time after the threaded portion of the bottle cap to avoid mildew affecting drinks
The amount.
6. The control valves are sanitary type pneumatic valves, pipes are made of high-quality polished stainless steel inside and outside 0Cr19Ni9 sanitary pipe, smooth inside and outside surface of the pipe roughness Ra≤0.8. Conduit pipe should be no dead ends, no "bag", set the necessary discharges or sampling port, minimizing material
Material remaining in the pipes and valves to facilitate CIP cleaning.

7. Secondary filling technology

When the PET bottle into the filling machine for the device, with the rise of the cam, PET bottle and filling valve gasket contacts, and open the top of the valve sleeve, while the cylinder valve opening action, outer lever to open the upper part of the rotary valve filling valve, start filling first; when the material arrives at the lower end of the valve casing,

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PET debris generally preclude the use of centrifugal dewatering machine so debris moisture content to 2%, and then by a belt or tube dryer to a moisture content is reduced to 0.5%. German Krones company successfully developed high-quality PET plastic bottle recycling system, the processing capacity of up to 15,000 tons PET bottles, the PET raw material can be directly processed into other PET container production, production costs are significantly reduced.
PET plastic bottle recycling system to eliminate the use of chemical coating technology to burn alkali chemical coating removing agent to remove surface adhesion PET plastic bottles contaminants can achieve any kind of PET plastic bottles for recycling. After the technical processing of recycled products, not only the production of preforms can be mixed directly, at the same time, recycled products due to low levels of acetaldehyde and yellow pigment, but also to meet the requirements of purity and quality, especially for food and beverage industry products Packaging costs 20% -30% lower than the average of new materials.
Pet plastic bottle Characteristics
Polyethylene terephthalate is a thermoplastic polyester in the most important species, the English called Polythylene terephthalate referred to as PET or PETP (hereinafter otherwise known as PET), commonly known as polyester resin. It is terephthalic acid and ethylene glycol polycondensate, and together referred to as PBT thermoplastic polyester, or polyester. PET is a milky white or former yellow highly crystalline polymers, the surface smooth and shiny.
Creep resistance, fatigue resistance, abrasion and good dimensional stability, wear small, high hardness, the largest thermoplastic toughness; electrical insulation properties, little affected by temperature, but poor resistance to corona. Non-toxic, weather resistance and good resistance to chemical stability, low water absorption, resistance to weak acids and organic solvents.
PET bottle hot filling machine design

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The latter process: The recovery process is the first component of the non-PET PET bottles separated, then crushed recycled. It is the first use of artificial means stone, wood and other plastic products and colored bottles separated. Separation PVC bottles used in artificial selection methods or PVC separation device. Separation of metallic iron can be isolated magnet separator. Beverage bottles through the conveyor into the cleaning machine, bottle vertically into the processing line, in addition to the ring by machine and capping machine in addition to the cap and pull ring removed and weighed to ensure that the cap has been removed, it detected more than the standard weight of a bottle it is separated from the line out. Then injected into each waste PET bottles 100ml boiling water, dissolve the residue drinks bottle, while the bottle was clamped suspended, bottle external high pressure water scrub with hot water to soften the adhesive so that the base off on their own, plastic or paper labels prolapse. After washing the bottom of the bottle after removal, release bottle of water. A process like the first break in the equipment can be, through continuous drier PET bottle flake dried to a moisture content of less than 0.05%. Extrusion granulation end] the same kind of recovery process.
These two recovery technology have factories use. The process is its own characteristics. The first recovery process easier to form large-scale production, but the separation technique is more complex, more separation equipment, large investment. The second method of high purity, using less equipment investment than the province, but only for a complete unbroken bottles, squashed or broken bottles need to separate out separately recovered by other methods. In fact plastic bottles from considerations of economic rationality transport, should be transported flattened after dressing. Second, cut out bottle recycling base essentially as the first approach, a second recovery method therefore more limited. Domestic recycled PET manufacturing colored pesticide, alternative glass to reduce product damage. Foreign manufacturing PET packaging recycling PET. Australia with PET recovered starting material as an intermediate layer three bottles, are widely used in the production of 3-17dtex recycled PET staple fibers.

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After cleaning, the first fan to blow PET can be blown clean paper, if there is a problem, it may be PET water is not dry or alkaline concentration is not fine.
2, how to remove metallized PET plastic bottle?
Removal method is: with a heated iron, the iron at the mouth of the bottle, the bottle is heated until the time, forced to push forward the bottle, then heated aluminized iron will remain in the top, the bottle no paste exist. Be careful not to overheat. Otherwise there will be a paste. Iron temperature above another job in reducing the residence time, the temperature is low, the more waiting to reach aluminized hand to promote the bottle off is appropriate.
Sixth, how to identify indicators of PET bottle flakes goods it?
The first is the use of different indicators led to different manufacturers requirements, index blowing factory requires a melting point of 250 degrees or more and a viscosity of 0.7 can not have a little impurity, indicators staple plant requirement is 250 degrees above the melting point of the viscosity of 0.6, it can be seen blowing factory requirement is quite high.
Usually if the requirements are very accurate, then it should be sent to specialized testing agencies, such as chemical plants to test, so the most accurate data at the scene to see the goods, but we can only rely on the words of a little simple instrument measurements.
1, the first smell it, taste is different from the ordinary PET plastic. Burned with a lighter look, and then will smell very fragrant and pleasant taste (just cook a bottle to smell), if the PET contains other ingredients, the taste is very pungent. Ingredients inside the bottle containing the SEBS kind of can not be used.
2, see burning up part or if too much black oil droplets quickly, most of the melting point is not normal, it is often in the PET film sheet.

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How to remove metallized PET plastic bottle?
Removal method is: with a heated iron, the iron at the mouth of the bottle, the bottle is heated until the time, forced to push forward the bottle, then heated aluminized iron will remain in the top, the bottle no paste exist. Be careful not to overheat. Otherwise there will be a paste. Iron temperature above another job in reducing the residence time, the temperature is low, the more waiting to reach aluminized hand to promote the bottle off is appropriate.
Sixth, how to identify indicators of PET bottle flakes goods it?
The first is the use of different indicators led to different manufacturers requirements, index blowing factory requires a melting point of 250 degrees or more and a viscosity of 0.7 can not have a little impurity, indicators staple plant requirement is 250 degrees above the melting point of the viscosity of 0.6, it can be seen blowing factory requirement is quite high.
Usually if the requirements are very accurate, then it should be sent to specialized testing agencies, such as chemical plants to test, so the most accurate data at the scene to see the goods, but we can only rely on the words of a little simple instrument measurements.
1, the first smell it, taste is different from the ordinary PET plastic. Burned with a lighter look, and then will smell very fragrant and pleasant taste (just cook a bottle to smell), if the PET contains other ingredients, the taste is very pungent. Ingredients inside the bottle containing the SEBS kind of can not be used.
2, see burning up part or if too much black oil droplets quickly, most of the melting point is not normal, it is often in the PET film sheet.
3, drawing, burning time pull the wire on the lighter, no longer see long strands, and then pull out the strands break, look at the middle of the break, the wire is not rolled into a small circle shape, the more volume Multi described high melting point but generally if a bottle flakes, should not be a big problem. The most crucial point! Is resolved if any of them contain PVC, PET this is more fatal to first sampling, then plated in a sunny place, PVC pale blue in the sun. If you have a white crease to fold them over is visually identified.

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Buffer
Buffer is completed after each injection screw head in front of the balance, too little will result in poor shape, too much can cause PET decomposition. The amount is generally adjusted gradually from small to large, to preform not hair spray or crystallization as appropriate.
Cool down
PET opaque and transparent preform reason, rely on cooling. Not to reduce the cooling rate of cooling preforms, it will lead to shrink, bottle deformation and influence the cycle time, in order to avoid this situation, to do: water treatment, regular cleaning of waterways, check the water flow and water pressure, core and type washable and other chamber. PET Preform type common problems and solutions Blowing
Blowing process
Biaxial stretching blow molding process is a process, in this process, PET chain was biaxially stretched, orientation and arrangement, thereby increasing the mechanical properties of the bottle wall to improve the tensile, tensile, impact strength, and there are good air tightness. While stretching helps improve strength, but not too much tension, to control the stretch blow-up ratio: Radial Do not exceed 3.5 to 4.2, 2.8 to 3.1 do not exceed the axial. Preform thickness should not exceed 4.5mm.
Blowing is between the glass transition temperature and crystallization temperature, generally controlled between 90 to 120 degrees. In this interval after PET showed high elastic state, fast blow, cooling set into a transparent bottle. In one step, the temperature is cooled by the injection molding process determines the length of time (such as Aoki blowing machine), so linking the injection - blow the relationship between the two stations.
Blow molding process are: stretch - a blow - the second blow, time three actions is very short, but it must be with the good, especially in the first two steps determine the overall distribution of materials, blowing their quality. So to regulate: stretch starting opportunity, stretching speed, start and end timing of pre-blowing, pre-blowing pressure, pre-gas flow rate, etc., if possible, to control overall temperature distribution preforms, bottles billet inner and outer walls of the temperature gradient.

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Parison mouth diameter and thread size bottle size should thread of unity, and to match the thread size caps. In this regard due to the current absence of a unified national standard, so according to the bottle contents were to determine the size of the bottle portion. Parison neck size determine when the blow mold cavity dimensions and should be considered contraction after molding bottles, PET bottle blow air pressure inside the parison is 1.2MPa, the use of 5 ~ 10 ℃ cooling water cooling blow mold, the parison after blow to the rapid cooling. 5, bottle injection blow molding mandrel features
Injection blow molding mandrel function used mainly in five areas: (1) determine the shape of the inner diameter of the bottle neck forming the parison (2) in mechanical indexing process to take away the parison or bottle; ( 3) a mandrel provided with airway with air entrances, delivery of compressed air to inflate the parison; (4) inside the mandrel can pass circulating liquid or air, in order to adjust the temperature of the parison; (5) at the rear near the mandrel with 0.10 mm deep open side of the groove, so that the ends of the parison wedging groove, avoid blow station go to the parison forming station from the process, the parison its elastic shrinking lead to neck screw dislocation. Seal grooves play a role in reducing leakage during blow compressed air. 6, choose the value of length to diameter mandrel
Length and diameter of the mandrel is mainly determined by the parison, the mandrel diameter than the inner diameter of the bottle neck smaller, easy to release the bottle. But mandrel diameter should take large values ??as much as possible within the scope of the bottleneck inner diameter in order to avoid excessive blow-up ratio. Coaxial mandrel diameter should be within 0.05 to 0.08 mm. Bottle parts mandrel diameter is the outer diameter of the bottle and the bottle on the thickness, the range is usually dark green bottle bottle rod diameter equal to the outer diameter minus twice the wall thickness of the bottle.

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m

So according to the bottle contents were to determine the size of the bottle portion. Parison neck size determine when the blow mold cavity dimensions and should be considered contraction after molding bottles, PET bottle blow air pressure inside the parison is 1.2MPa, the use of 5 ~ 10 ℃ cooling water cooling blow mold, the parison after blow to the rapid cooling. 5, bottle injection blow molding mandrel features
Injection blow molding mandrel function used mainly in five areas: (1) determine the shape of the inner diameter of the bottle neck forming the parison (2) in mechanical indexing process to take away the parison or bottle; ( 3) a mandrel provided with airway with air entrances, delivery of compressed air to inflate the parison; (4) inside the mandrel can pass circulating liquid or air, in order to adjust the temperature of the parison; (5) at the rear near the mandrel with 0.10 mm deep open side of the groove, so that the ends of the parison wedging groove, avoid blow station go to the parison forming station from the process, the parison its elastic shrinking lead to neck screw dislocation. Seal grooves play a role in reducing leakage during blow compressed air. 6, choose the value of length to diameter mandrel
Length and diameter of the mandrel is mainly determined by the parison, the mandrel diameter than the inner diameter of the bottle neck smaller, easy to release the bottle. But mandrel diameter should take large values ??as much as possible within the scope of the bottleneck inner diameter in order to avoid excessive blow-up ratio. Coaxial mandrel diameter should be within 0.05 to 0.08 mm. Bottle parts mandrel diameter is the outer diameter of the bottle and the bottle on the thickness, the range is usually dark green bottle bottle rod diameter equal to the outer diameter minus twice the wall thickness of the bottle.

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During the drying process, due to the high temperature polyester drying hopper equipment should have good thermal insulation properties and the use of glass fiber insulation, should avoid contact with the dry polyester raw materials and outside air, because polyester raw material will rapidly absorb moisture from the air. For example, the polyester raw material is completely dried and a relative humidity of 35% to 40% after 12min of exposure to air, i.e., a moisture content of 0.005%. Medicinal PET bottle molding method
PET bottle molding methods are extrusion blow molding and injection blow molding two processes. Stretch blow another one-step and two-step process of the points. In the one-step molding, parison molding, cooling, heating, stretching were taken in order to complete the blow and bottle on a machine. Rule two steps by extrusion or injection molding the parison, and the parison was cooled to room temperature, becoming semi-finished products, and then the parison is reheated and stretch blow molding machine become bottle. That parison molding, stretch blow molding is done on the two machines, respectively. One-step injection blow molding PET bottles, injection blow molding equipment requires two molds that parison injection mold and blow mold. The injection molded preform is mainly composed of the parison mold cavity and the mandrel, its parameters are chosen size of each part is correct or not is the key to whether the shape of the bottle. Therefore, the size of the mold preform molding process parameters combined with a reasonable selection. 1, the ratio of the height of its neck PET bottle thread diameter of the mandrel can be determined parison aspect ratio (L / D)
Mandrel aspect ratio generally ranging principle is no more than 10: 1. This is because the parison mold mandrel as a cantilever, and by the effect of high injection pressure during filling. Selected aspect ratio is larger, its larger mandrel bent, likely to cause the parison wall thickness distribution is uneven.

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Polyester (PET) bottles blow for raw materials for the saturated linear thermoplastic polyester, mainly used performance indicators are: the intrinsic viscosity (IV) should be controlled at 70 ~ 85ml / g, making blow molded bottles with high mechanical strength and transparency; for large volume (greater than 2 liters) of the bottle, the selection of an intrinsic viscosity of polyester raw materials 70 ~ 75ml / g. Injection blow molding bottle Preferred pharmaceutically acceptable small volume higher intrinsic viscosity index is preferably a material production. Since the variety of raw materials selection is correct or not, related to the merits of the selection and quality of bottle production process molding process parameters. Thus, in the production of medicinal PET bottles, intrinsic viscosity of the raw materials, the crystallization temperature, cooling rate, and other process data alignment effect is particularly important. This is because the polyester material is a crystallizable polymer, the crystallization rate is small, only 6μm / min (max). Through process control crystallization conditions such as temperature and cooling rate, the polyester bottle into a non-crystalline or crystalline, and can change the crystal type and quantity. Crystallinity of the polyester requirements generally about 30%. At or slightly above the glass transition temperature slightly below the melting point, the crystallization rate of the polyester is small, crystallization takes a long time, at a temperature of about 175 ℃, the crystallization time is much shorter. In short, only by heating a crystalline polyester, the crystallization process is slow, it is possible to form a larger spherulite crystal, which refracts the light, so that white goods, and brittleness. Furthermore, with increasing the crystallization rate of the polyester decreases their Ⅳ. Ordered molecular orientation of the polyester can promote crystallization, the formed crystals called strain-induced crystalline, the grain is small, the light is not refracted, so oriented polyester article is transparent.

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Mainly used performance indicators are: the intrinsic viscosity (IV) should be controlled at 70 ~ 85ml / g, making blow molded bottles with high mechanical strength and transparency; for large volume (greater than 2 liters) of the bottle, the selection of an intrinsic viscosity of polyester raw materials 70 ~ 75ml / g. Injection blow molding bottle Preferred pharmaceutically acceptable small volume higher intrinsic viscosity index is preferably a material production. Since the variety of raw materials selection is correct or not, related to the merits of the selection and quality of bottle production process molding process parameters. Thus, in the production of medicinal PET bottles, intrinsic viscosity of the raw materials, the crystallization temperature, cooling rate, and other process data alignment effect is particularly important. This is because the polyester material is a crystallizable polymer, the crystallization rate is small, only 6μm / min (max). Through process control crystallization conditions such as temperature and cooling rate, the polyester bottle into a non-crystalline or crystalline, and can change the crystal type and quantity. Crystallinity of the polyester requirements generally about 30%. At or slightly above the glass transition temperature slightly below the melting point, the crystallization rate of the polyester is small, crystallization takes a long time, at a temperature of about 175 ℃, the crystallization time is much shorter. In short, only by heating a crystalline polyester, the crystallization process is slow, it is possible to form a larger spherulite crystal, which refracts the light, so that white goods, and brittleness. Furthermore, with increasing the crystallization rate of the polyester decreases their Ⅳ. Ordered molecular orientation of the polyester can promote crystallization, the formed crystals called strain-induced crystalline, the grain is small, the light is not refracted, so oriented polyester article is transparent. If the sample of polyester partially crystalline orientation as heat setting to make further crystallized sample remains transparent. Therefore, the crystal orientation of the impact and stretch blow molding of PET bottles during the key factor to ensure performance. If the hot filling of bottles with bar-type sterilization, but also on the part of the crystalline polyester for heat setting, the further crystallization so in order to improve heat resistance. 2, polyester material dehumidifying and drying。

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2.1 Preform
The preparation of blow molded bottles, PET chips first injection molded preforms, it requires twice the proportion of recycled material is not too high (5%), the recovery can not be more than twice the number of times, but not too low molecular weight and viscosity (molecular weight 31000- 50,000, intrinsic viscosity 0.78-0.85cm3 / g). Injection molded preform should be stored for more than 48h before using. After heating did not run out of preforms must then be stored for more than 48h before being reheated to use. Preform storage time should not exceed six months.
Preform depends largely on the merits of the merits of PET materials should be selected easy to blow, easy stereotypes of material, and develop a reasonable preform molding process. Experimental results show that the viscosity of the same material molding PET preforms, imported raw materials than domestic Yi blow molding; and the same batch of preforms, production dates are different, the blow molding process may also be quite different. Preform the merits of the decision to ease the blow molding process, the requirements of the preform is pure, transparent, free of impurities, the same color, length and injection points around coronatines appropriate. 2.2 heating
Preform is heated by the heating oven to complete, the temperature is set manually, automatically adjusted. Emit far infrared oven heated by the far infrared radiation preform tube, the bottom of the oven fan heat circulation, so the oven temperature uniformity. Preform in the oven at the same time moves forward rotation, so preform wall heat evenly.
Lamps arranged in an oven from top to bottom general was "zone" shape, more than two and less in the middle. Heat the oven by opening the number of lamps, the overall temperature setting, and each section was heated oven power than joint control. The lamp is turned in conjunction with the pre-blowing to be adjusted.
To play a better role oven, adjust its height, the cooling plate, etc. is very important, if adjusted properly, prone to swelling during blow bottle (bottle large), a hard head and neck (neck material will not pull out), etc. defects.

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Injection molding preforms and bottle blow-up ratio of the value of
Small volume injection blow molding of PET bottles, in the process of molding process, the parison occurs mainly axial tension. The smaller axial tension, the greater the blow ratio (ratio refers to the diameter of the bottle and the parison diameter), the possibility of uneven thickness distribution of the bottle greater, could easily lead to the shoulder and the bottle or bottle bottle and the bottle the bottom curved areas of uneven thickness transition region. Small flask body blow ratio generally take between 1.5 to 1.8. On the cross-section of the bottle oval, if it is less than the ratio of the length that is oval ellipse minor axis ratio 1.5: 1, may be circular in cross section forming a parison. Elliptic is no more than 2: 1, can be circular in cross section and oval mandrel parison molding. Ellipse ratio greater than 2: 1, the general requirements mandrel and parison cavity are designed into an oval. Ellipse ratio increases, the difficulty of the parison mold design and manufacturing costs were increased, generally should not exceed 3: 1.
4, injection molding parison mouth and neck size
Parison mouth diameter and thread size bottle size should thread of unity, and to match the thread size caps. In this regard due to the current absence of a unified national standard, so according to the bottle contents were to determine the size of the bottle portion. Parison neck size determine when the blow mold cavity dimensions and should be considered contraction after molding bottles, PET bottle blow air pressure inside the parison is 1.2MPa, the use of 5 ~ 10 ℃ cooling water cooling blow mold, the parison after blow to the rapid cooling.
5, bottle injection blow molding mandrel features
Injection blow molding mandrel function used mainly in five areas: (1) determine the shape of the inner diameter of the bottle neck forming the parison (2) in mechanical indexing process to take away the parison or bottle; ( 3) a mandrel provided with airway with air entrances, delivery of compressed air to inflate the parison; (4) inside the mandrel can pass circulating liquid or air, in order to adjust the temperature of the parison; (5) at the rear near the mandrel with 0.10 mm deep open side of the groove, so that the ends of the parison wedging groove, avoid blow station go to the parison forming station from the process, the parison its elastic shrinking lead to neck screw dislocation. Seal grooves play a role in reducing leakage during blow compressed air.

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The ratio of the height of its neck PET bottle thread diameter of the mandrel can be determined parison aspect ratio (L / D)
Mandrel aspect ratio generally ranging principle is no more than 10: 1. This is because the parison mold mandrel as a cantilever, and by the effect of high injection pressure during filling. Selected aspect ratio is larger, its larger mandrel bent, likely to cause the parison wall thickness distribution is uneven. However, through the program to control the melt filling speed or filling process using a sliding thimble temporarily secured to the mandrel head end of the mandrel, the mandrel diameter ratio advisable at this great value. Parison reference height is the height of the bottle body height obtained by multiplying the coefficient, the height of the bottle is generally 92% to 95%. In order to ensure good transparency of the bottle, a melt parison mold after filling, the temperature was quickly lowered to less 145 ℃, but than the glass transition temperature of the polyester material (82 ℃) higher and closer to the glass temperature, the higher the transparency of blown bottles. Parison mold cooling water temperature up to 10 ℃ ~ 35 ℃, for rapid cooling of the parison, it will take a liquid or gas to the mandrel continuous cooling, where cool air mandrel can have a more uniform temperature distribution, the air pressure is generally about 1MPa.
2, the melt temperature of the preform during injection
????The melt temperature is an important parameter PET preform molding to note. From the viewpoint of equipment, screw design have a greater impact on the PET melt, mix and melt temperature. PET injection to the use of low shear, low compression ratio (about 2/1) of the screw, made longer feed section, a transition section and a metering section made shorter. Barrel temperature of the device a greater impact on the melt temperature, barrel temperature increase will reduce the intrinsic viscosity of the PET melt. Barrel temperature had a significant effect on the parison transparency, improve cylinder temperature can improve the transparency of the parison. For example, when a barrel temperature of 280 ℃, the corresponding melt temperature of 290 ℃, can ensure optimal transparency parison. The barrel temperature increase does not improve further transparency. Lower barrel temperatures, an appropriate increase in screw speed to clap gate temperature, small quantities can improve the transparency of the parison. However, due to the hot runner system melt through time is short, to a lesser extent the temperature of the parison transparency improvement. Increase the injection pressure, i.e., when the injection rate, the heat generated when high shear melt through the nozzle, the melt temperature is significantly improved, so that the barrel temperature can be lower transparent molded parison. Higher packing pressure will increase the rate of crystallization when cooling the melt parison mold, reducing the transparency of the parison, especially at lower cylinder temperature.

Plastic Packaging

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Thus, in the production of medicinal PET bottles, intrinsic viscosity of the raw materials, the crystallization temperature, cooling rate, and other process data alignment effect is particularly important. This is because the polyester material is a crystallizable polymer, the crystallization rate is small, only 6μm / min (max). Through process control crystallization conditions such as temperature and cooling rate, the polyester bottle into a non-crystalline or crystalline, and can change the crystal type and quantity. Crystallinity of the polyester requirements generally about 30%. At or slightly above the glass transition temperature slightly below the melting point, the crystallization rate of the polyester is small, crystallization takes a long time, at a temperature of about 175 ℃, the crystallization time is much shorter. In short, only by heating a crystalline polyester, the crystallization process is slow, it is possible to form a larger spherulite crystal, which refracts the light, so that white goods, and brittleness. Furthermore, with increasing the crystallization rate of the polyester decreases their Ⅳ. Ordered molecular orientation of the polyester can promote crystallization, the formed crystals called strain-induced crystalline, the grain is small, the light is not refracted, so oriented polyester article is transparent. If the sample of polyester partially crystalline orientation as heat setting to make further crystallized sample remains transparent. Therefore, the crystal orientation of the impact and stretch blow molding of PET bottles during the key factor to ensure performance. If the hot filling of bottles with bar-type sterilization, but also on the part of the crystalline polyester for heat setting, the further crystallization so in order to improve heat resistance.
2, polyester material dehumidifying and drying.
Because the processing of the polyester, wherein the moisture contained in the hydrolysis process will chemically react with the polyester melt rapidly consumed, i.e. water bubbles in the article. Hydrolysis will reduce the intrinsic viscosity of the polyester melt, but also affect the mechanical strength and performance of products, while the polyester raw material is a hygroscopic polymer, it should be subject to stringent and dried prior to processing to excess moisture content of less than 0.005%. Polyester raw materials to be used desiccant drying system to dry.

Wine Bottles

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Preform is heated by the heating oven to complete, the temperature is set manually, automatically adjusted. Emit far infrared oven heated by the far infrared radiation preform tube, the bottom of the oven fan heat circulation, so the oven temperature uniformity. Preform in the oven at the same time moves forward rotation, so preform wall heat evenly.
Lamps arranged in an oven from top to bottom general was "zone" shape, more than two and less in the middle. Heat the oven by opening the number of lamps, the overall temperature setting, and each section was heated oven power than joint control. The lamp is turned in conjunction with the pre-blowing to be adjusted.
To play a better role oven, adjust its height, the cooling plate, etc. is very important, if adjusted properly, prone to swelling during blow bottle (bottle large), a hard head and neck (neck material will not pull out), etc. defects.
2.3 pre-blow
Pre-blowing is a two-step blow molding method is a very important step, it refers to the stretch blow molding process, while the rod drop pre-blowing beginning to make preforms in its shape. This step is a pre-blow position, pre-blowing pressure and gas flow rate are three important technological factors.
Pre-blowing shape determines the difficulty of the merits of the performance of the bottle blow molding process of the pros and cons. Pre-blowing normal spindle shape, unusual, there are sub-bell-like, handle-shaped and so on, as shown in FIG. Causes abnormal shapes have local heating improper or inadequate pre-blowing pressure gas flow rate, etc., and the pre-blowing the size depends on the pre-blow pressure and pre-blow position. In the production of the entire equipment to maintain all pre-blowing uniform size and shape, if the difference will have to look for specific reasons, can adjust the heating or pre-blow process according to the pre-blowing situation.
With the size of the pre-blow pressure bottle size, equipment capacity varies, large general capacity, pre-blowing pressure to be small; equipment production capacity, pre-blowing pressure is high.

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Adjust its height, the cooling plate, etc. is important to make the oven work better. When adjusted properly, prone to swelling during blow bottle (bottle larger) hard head and neck (neck material will not pull out) and other defects. 2.3 pre-blow
Refers to the stretch blow molding process in the pre-start lever is declining blowing, pre-blowing is a two-step blow molding method is a very important step. Begun to take shape make preforms. This step is a pre-blow position, pre-blowing pressure and gas flow rate are three important technological factors.
Abnormal there are sub-bell-like, handle shape. Causes abnormal shape undue local heating, the shape of the merits of pre-determined blowing ease and bottle blow molding process of the merits of the performance. Pre-blowing normal spindle shape. Pre-blowing pressure or blowing insufficient flow, etc., and the pre-blowing depends on the size of the pre-blow pressure and pre-blow position. Production of the entire equipment to maintain all pre-blowing uniform size and shape, if the difference will have to look for specific reasons, can adjust the heating or pre-blow process according to the pre-blowing situation.
General capacity, pre-blowing pressure to be small; equipment production capacity, with the size of the pre-blow pressure bottle size, device capabilities vary. Pre-blowing pressure is high.
PET materials due to differences in performance, even when using the same equipment in the same standard bottles. It requires pre-blow pressure are not the same. Glass fiber reinforced PET data, the smaller pre-blowing pressure so that the bottom of the bottle to the correct orientation of macromolecules; improper or inappropriate preform molding process other materials, there is a lot of stress near the injection point of focus is not easy to subside, if Blow, blow often broken or burst from the injection point in the stress test, the leakage at the injection point. According to the orientation of the conditions, then you can, as shown on the tube is removed 2-3 branch to open over the injection point, given injection point is sufficiently heated to provide enough heat to facilitate their rapid orientation.

Sample Bottles

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PET bottles injection blow molding process parameter values
When the injection blow molding of PET bottles to control the melt temperature, it is in the range of 275 ℃ ~ 285 ℃, injection blow molding stage polymer than most of the high temperature of about 50 ℃. Hot runner system to adopt a streamlined, symmetrical design, to avoid dead ends. Nozzle with locking structure, the outer surface to be heated. To ensure that the parison has a high transparency, after filling the melt into a parison mold to be rapidly cooled to below 145 ℃, but than its glass transition temperature (82 ℃) higher and closer to the glass transition temperature, blow bottle higher transparency, can broaden the range of processing. Parison mold cooling water temperature should be as low as 10 ℃ ~ 35 ℃, rapid cooling of the parison. Also the use of a liquid or gas continuous cooling mandrel. Wherein the air cooling mandrel can have a more uniform axial temperature profile, and also will not leak. Cold air pressure within the mandrel typically 1MPa. Preferably liquid, gas cooling combination, PET parison inflation pressure is about 1.2MPa. Use of the cooling water temperature 5 ℃ ~ 10 ℃. Cooling blow molds, but also the parison rapidly cooling inflation.

PET bottle flakes processing

Improved rapid growth of PET bottle consumption, collection systems and change Europe in the regulations, for the rapid development of PET recycling industry offers new opportunities and new challenges.
There are many products made from recycled materials replace the pure material, creating economic and process technical sense, they are commonly used fibers, thermoformed sheet, non-woven fibers, packing tape, and even master batch and bottles.
Each of these processes are expected to be recovered PET performance requests, close to the requirements of the pure material presented. In addition to molecular weight (often referred to as intrinsic viscosity) away, melt foreign particles or contaminants (such as paper, sand, glue, PP and PVC and other plastics) will have an impact on product quality.
Highest quality requirements appear in so-called "bottle - bottle" recycling process. In this case, only when the source is determined by the use of bottles and under control, such as the backlog of recycled bottles, the process is practical and economically feasible.

Water Bottle

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The temperature will lead to a small increase in the intrinsic viscosity of the polyester greatly reduced, so the drying time should be as short as possible in order to broaden the operating range. During the drying process, due to the high temperature polyester drying hopper equipment should have good thermal insulation properties and the use of glass fiber insulation, should avoid contact with the dry polyester raw materials and outside air, because polyester raw material will rapidly absorb moisture from the air. For example, the polyester raw material is completely dried and a relative humidity of 35% to 40% after 12min of exposure to air, i.e., a moisture content of 0.005%. Medicinal PET bottle molding method
PET bottle molding methods are extrusion blow molding and injection blow molding two processes. Stretch blow another one-step and two-step process of the points. In the one-step molding, parison molding, cooling, heating, stretching were taken in order to complete the blow and bottle on a machine. Rule two steps by extrusion or injection molding the parison, and the parison was cooled to room temperature, becoming semi-finished products, and then the parison is reheated and stretch blow molding machine become bottle. That parison molding, stretch blow molding is done on the two machines, respectively. One-step injection blow molding PET bottles, injection blow molding equipment requires two molds that parison injection mold and blow mold. The injection molded preform is mainly composed of the parison mold cavity and the mandrel, its parameters are chosen size of each part is correct or not is the key to whether the shape of the bottle. Therefore, the size of the mold preform molding process parameters combined with a reasonable selection. 1, the ratio of the height of its neck PET bottle thread diameter of the mandrel can be determined parison aspect ratio (L / D)
Mandrel aspect ratio generally ranging principle is no more than 10: 1. This is because the parison mold mandrel as a cantilever, and by the effect of high injection pressure during filling.

Dropper Bottles

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The difficulty of the important factors affecting the PET bottle blow mold process, the shape of the mold will reduce or increase the merits of the adjustment process, such as ribs, thermal conditions and the curvature of the bottom of the transition zone of the adjustment process so influential. 2.5 Environment
The quality of the production environment have a greater impact on the adjustment process, constant conditions can maintain the stability of the process and the stability of the product. PET bottle blow molding generally carried out at room temperature, low humidity state is better. 3 Other requirements
Pressure bottle should also meet the stress test and the pressure test requirements. Stress testing is to prevent the degradation of the molecular chains during PET bottle filling beverage bottle with a lubricant (basic) during contact and cracking, leakage and other internal quality control; the pressure test is to prevent the bottle filling quality have burst after a certain pressure gas into the line of control. In order to meet these two needs, the center of the thickness to be controlled within a certain range, in general, is the center of thin, good stress test, pressure is poor; the center of thick, pressure test better, worse stress test. Of course, the results of the stress test is also related to the accumulation area around the center point of transition material has a great relationship, which should be adjusted based on actual experience. 4 Conclusion
PET bottle blow molding process adjustment is carried out for the respective material, if poor materials, process requirements very harsh, even hard blow qualified bottle.
PET bottles, caps knowledge introduction
Full name is PET Polyethylene Terephthalate (polyethylene terephthalate), is composed of a polymer of terephthalic acid (Terephthalic acid) and ethylene glycol (Ethylene glycol) produced after a compound, referred to as polyester. PET plastic with light weight, high transparency, impact resistance not broken and other characteristics, but also can prevent carbon dioxide gas, so soda maintain a "vapor." Therefore, PET plastic suitable for packaging, especially laden water and soft drinks! Normal PET bottles from PET production processes is the oil additive melt polyester chip preforms after injection, at a certain temperature and humidity storage environment after a period of time without crystallization or crystallization, and then blown into bottles. Cover material, mostly PP and PE, injection molding and compression molding two points, similar to the production process and bottle, but using masterbatch, some need with less cushion, cover the surface sometimes affixed trademarks, and other printed, including injection molding cover top faint dot.

Empty Spray Bottles

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Preform depends largely on the merits of the merits of PET materials should be selected easy to blow, easy stereotypes of material, and develop a reasonable preform molding process. Experimental results show that the viscosity of the same material molding PET preforms, imported raw materials than domestic Yi blow molding; and the same batch of preforms, production dates are different, the blow molding process may also be quite different. Preform the merits of the decision to ease the blow molding process, the requirements of the preform is pure, transparent, free of impurities, the same color, length and injection points around coronatines appropriate. 2.2 heating
Preform is heated by the heating oven to complete, the temperature is set manually, automatically adjusted. Emit far infrared oven heated by the far infrared radiation preform tube, the bottom of the oven fan heat circulation, so the oven temperature uniformity. Preform in the oven at the same time moves forward rotation, so preform wall heat evenly.
Lamps arranged in an oven from top to bottom general was "zone" shape, more than two and less in the middle. Heat the oven by opening the number of lamps, the overall temperature setting, and each section was heated oven power than joint control. The lamp is turned in conjunction with the pre-blowing to be adjusted.
To play a better role oven, adjust its height, the cooling plate, etc. is very important, if adjusted properly, prone to swelling during blow bottle (bottle large), a hard head and neck (neck material will not pull out), etc. defects. 2.3 pre-blow
Pre-blowing is a two-step blow molding method is a very important step, it refers to the stretch blow molding process, while the rod drop pre-blowing beginning to make preforms in its shape. This step is a pre-blow position, pre-blowing pressure and gas flow rate are three important technological factors. Pre-blowing shape determines the difficulty of the merits of the performance of the bottle blow molding process of the pros and cons. Pre-blowing normal spindle shape, unusual, there are sub-bell-like, handle-shaped and so on, as shown in FIG. Causes abnormal shapes have local heating improper or inadequate pre-blowing pressure gas flow rate, etc.,

Blue Glass Bottles

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Structure: die sets, die lip, core, upper blanks, blanks next row, cavity, hot runner, guide posts (four) How it works: the lower plate of the mandrel decline in cavities on the joint, to form a sealed space, plastic PET is injected at high pressure through the injection gun runner, ambient cooling circulation system enables the formation of a plasticized molding PET preforms quickly. (9 injection mold)
NOTE: Preform PET means half-finished products, usually cylindrical. Preform has been formed and a ring thread for screwing shut the lid of the bottle, after which continued through another stage of the process available to the finished product.
3.5 injection clamping mechanism unit
10 injection holder
The main structure of the device: 1 chain drive top rung 2. 3. 4. 9. The bottom flange slide guide column 5. barrel coupling flange 6. 7. 8. drum cylinder housing crosspiece 10. The fork 11. Toggle Clamps fixed fork 13. 12. 14. The mold wedge presses manifold 15. 17. 16. T-slot extrusion mold center key cylinder 18. 19. 20. The gear motor pin extruder 21. Extruder 23. 22. The nut plate 24. The lever 25. The safety device pneumatic device (Figure 10 injection clamp)
How it works: the upper and lower wishbone, four slide columns, holding bracket and locking clamping mechanism of the safety device when opening the mold clamping mechanism constitutes a hinge injection. Loaded clamping mechanism clamping device provides the required pre-loaded, allowing the arm raised and lowered. Vertical movement by a hydraulic cylinder mechanism implemented in two phases:
A mold is closed: the cylinder stretch, driving arm movement. Hinged offset extending high pressure injection molding preform formed. The upper arm is completely lowered (die off)
B mold is opened: the hydraulic cylinder contracts, folding hinge mechanism, the top arm rises (open mold). Bottom wishbone rise. When in manual mode, the cursor movement safety device to prevent accidental close the injection mold.
3.6 delivery device unit.

Plastic Bottles Recycling

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PET bottle has been extended in the heat bottled drinks black tea, green tea, fruit juice and cooking oil, cosmetics, pharmaceuticals, pesticides and other industries in the application. According to reports, production of PET bottles in 1996 to 3 billion in 1998 rose to 5 billion in 2000 to 8 billion in 2001, 9 billion, in 2002 to reach 10 billion, 13 billion in 2004, becoming the Plastic packaging materials largest increase in varieties.

A process analysis
1.1 What is PET bottles
PET is polyethylene terephthalate glycol (polyethylene terephthalate) acronym, is a food industrial plastic, its performance more stable. PET plastic with light weight, high transparency, impact resistance, not fragmentation and other features, can also be prevented by carbon dioxide and other gases. PET bottle (right) is the PET plastic bottles, widely used in food packaging, such as beverages, food packaging, etc., with safe, easy molding.
Because of light weight, good storability, nature heat, pressure, etc., PET bottles has become one of the main materials, packaging drinking today, can partially replace PVC bottles, bags, aluminum cans, steel cans, glass bottles. Many require high temperature sterilization conditions was able to fill fruit juice beverages, dairy products, sports drinks, also have the use of PET bottles.
PET bottles also have a low environmental pollution and consumption of energy in the increasing emphasis on environmental protection today is gradually replacing traditional packaging material, it has become the most growth potential of the packaging material.
1.2 PET bottle processing requirements and methods can be realized
PET bottles in the production process, raw materials are by melting, injection molding, blow molding, three-step process consisting of production. In order to ensure the smooth progress of these three main components, the need for material pretreatment.

Plastic Jar

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In the filling line, the technical content of the labeling machine is relatively high, the domestic market is still in the monopoly of foreign brands, currently only in Guangdong Ping Hang Machinery Plant can keep up with market developments. From a market perspective, Mr. Liang Tong SIG Alfa Alfa's China manager believes that the labeling machine on the one hand to be flexible to adapt to the needs of customers at a rate of speed and filling machine flat premise, on the other hand is to reduce costs requirements. Technically, in the domestic leading position labeling technology Krones labeller Mr. Robert think the direction is the component labeling machine, the same machine to meet the labeling of several different ways. Miss Feng Jianxin Chinese manager of its reference to the new year Krones direct sleeve Sleevematic DS and Sleevematic DS Inline Inline direct casing two labeling machines, without a vacuum device can reduce the cleaning work. Sacmi Labeling Machine Opera performance is excellent, and its rolling labeling machine can be continuously effective to 60,000 bottles / h work, you can label the bottles and bottle solid, even as inadequate labeling can be a light 13g bottle; at the same time they also suitable for the latest label material (18mm of OPP or PET), no difference in the use of other materials. The biggest problem before the labeling machine is that the efficiency of the bottling line, and users tend to arrange 2 or 3 labeling machines working in parallel, particularly in the rolling labeling process, often two or three machines. When the linear arrangement of the machines work on the same assembly line, which is obviously a waste of money. The roll labeling machines on the efficiency and speed have a good guarantee, but for shrink labels. Currently, Sacmi is being tackled in a non-straight wall of the bottle sticker labeling and high-speed technology. PET bottle recycling recycling technology treatment method, in addition to physical methods, chemical recovery and more attention, including Australia Petrecycle pty's penew patented technology is being applied, the device can handle 100kt of PET bottles.

Cosmetic Bottles

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 German family enterprises, under the 18 enterprises in 2003 annual sales of 310 million euros in China's Kunshan, founded in 1998 in China, the main provider of 30/25 and PCO 28 Pingzui caps, 38mm, 48mm and five gallons The Tamper Evident caps. and functional caps (such as bottled water for foods). Its production of about 900 million Chinese 30mm cap for the "non-carbonated drinks," the industry now launched the "Gabriel cover service pack "is a new form of packaging together with the user research, far beyond the standard cap design. As in 38mm hot-fill fields, SK 38/16 DoubleSeal hot-fill bottle ideal for large-scale equipment for efficient filling Solutions Taiwan welcomes all belong to the Master Group, a subsidiary of the company, but also food and beverage packaging bottle, bottle embryo experts, its innovative KingCan caps for a variety of refillable or non-recyclable household packaging such as glass bottles, plastic bottles, cardboard and metal containers provide caps, it can also provide a variety with a gasket or no gasket cap; colors can be varied, monochrome to four-color top printing or relief, in order to facilitate branding ; while providing patent for the design and manufacture of PET bottle closures of the inner plug. Challenge everywhere air PET bottles has good transparency, chemical stability, good barrier properties, low cost and recyclable light, etc., but there are three kinds of PET bottles requires barrier: First, the O2-sensitive juice and dairy products as well as a vial of carbonated beverages; the second is CO2-containing products; third is both sensitive to O2 and CO2-containing products, such as beer. As beer bottles, PET bottles barrier by a severe test, all drinks beer packaging is the most demanding. This is the 2002 global 250 billion beer containers only less than 0.1% using PET bottles reasons.

Plastic Bottles For Sale

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Preform depends largely on the merits of the merits of PET materials

should be selected easy to blow, easy stereotypes of material, and

develop a reasonable preform molding process. Experimental results show

that the viscosity of the same material molding PET preforms, imported

raw materials than domestic Yi blow molding; and the same batch of

preforms, production dates are different, the blow molding process may

also be quite different. Preform the merits of the decision to ease the

blow molding process, the requirements of the preform is pure,

transparent, free of impurities, the same color, length and injection

points around coronatines appropriate.

2.2 heating

Preform is heated by the heating oven to complete, the temperature is set

manually, automatically adjusted. Emit far infrared oven heated by the

far infrared radiation preform tube, the bottom of the oven fan heat

circulation, so the oven temperature uniformity. Preform in the oven at

the same time moves forward rotation, so preform wall heat evenly.

Lamps arranged in an oven from top to bottom general was "zone" shape,

more than two and less in the middle. Heat the oven by opening the number

of lamps, the overall temperature setting, and each section was heated

oven power than joint control. The lamp is turned in conjunction with the

pre-blowing to be adjusted.

To play a better role oven, adjust its height, the cooling plate, etc. is

very important, if adjusted properly, prone to swelling during blow

bottle (bottle large), a hard head and neck (neck material will not pull

out), etc. defects.

2.3 pre-blow

Pre-blowing is a two-step blow molding method is a very important step,

it refers to the stretch blow molding process, while the rod drop pre-

blowing beginning to make preforms in its shape. This step is a pre-blow

position, pre-blowing pressure and gas flow rate are three important

technological factors.

Pre-blowing shape determines the difficulty of the merits of the

performance of the bottle blow molding process of the pros and cons.

Pre-blowing normal spindle shape, unusual, there are sub-bell-like,

handle-shaped and so on, as shown in FIG. Causes abnormal shapes have

local heating improper or inadequate pre-blowing pressure gas flow rate,

etc., and the pre-blowing the size depends on the pre-blow pressure and

pre-blow position. In the production of the entire equipment to maintain

all pre-blowing uniform size and shape, if the difference will have to

look for specific reasons, can adjust the heating or pre-blow process

according to the pre-blowing situation.

Wholesale Plastic Bottles Bottle Packaging

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PET bottle technology than about 30 years ago developed by the DuPont system of law after the biaxial stretch. Began to grow rapidly. In use in Europe from 23 million tonnes in 1987 to 550,000 tonnes in 1992 and 900,000 in 2000 tonnes. The amount of the world's 2.4 million tons from 1993 to 2000, five million tons annually at an average rate of 10% growth. biaxially-oriented PET bottles with the following characteristics

1, good transparency and gloss performance, with modern.
2, the weight is much lighter than glass bottles or direct blow PVC bottles.
3, poor ventilation, good for carbon dioxide, oxygen and other gas barrier properties.
4, excellent food hygiene
5, resistant to almost all organic solvents.

Therefore, PET is widely used in the mineral water bottles, soft drinks, soft drinks, and cooking oil bottles, cosmetics, condiments, cleaning agents bottle. And are continuing to grow every year.

Recovery of PET material is substantial growth every year. Feedstock recycling after use is very wide and can then made a bottle, carpet, strapping, fiber fillers, etc. for environmental protection, it is ideal for plastic containers.
Second, the characteristics of PET material(Melt phase) a molten polymer early PET manufacturing process, an average of about 80 to 100 fat cells linked together. PET this financial state escorted out and cut into pellets, its IV (intrinsic viscosity) value of about 0.6 can be pumped directly into the wire, it becomes a polyester yarn for textile use of solid state polymerization (solid statepolymerization), the initial polymerization of PET is reheated to 200∘C grains above, but below the melting point, filled with nitrogen or vacuum cycle to remove ethylene glycol, to produce a polymerization reaction in the solid state polymerization of PET can process The increase in molecular weight. time and temperature level of the polymerization of the relevant molecular weight, the longer the higher molecular weight, high temperature polymerization time can be shortened. Usually blowing with IV values ​​between about 0.72 to 0.80, higher heat filling bottle , is about 0.83.

PET is generally used in the container material to note the following features; 1, molecular weight (IV) 2, the amount of diethylene glycol (diethylene glycol, DEG) 3, acetaldehyde content (acetaldehye) 4, a carboxyl group (carboxyl end groups) 5, crystallization degree, 6, melting point, 7, the glass transition point, 8, the percentage of total polymer (copolymer content)

Medicinal PET Bottle Molding Method

Plastic Bottle Manufacturers, Custom Pet Bottles, Pet Bottles suppliers. www.plastic-bottle-manufacturers.com

PET bottle molding methods are extrusion blow molding and injection blow molding process in two ways, there are one-step and two-step stretch blow molding method of the points, in one-step molding, parison molding, cooling, heating, Remove and stretch blow molding and the bottle were successively performed on a machine, two-step rule by extrusion or injection molding parison, and the parison is cooled to room temperature, becoming semi-finished products, and then the parison into reheated and stretch blow-molding machine to become the bottle. That parison molding, stretch blow molding is done on the two machines, respectively. One-step injection blow molding PET bottles, injection blow molding equipment requires two mold that is injection mold and blow mold preforms. The injection molded preform is mainly composed of the parison mold cavity and the mandrel, its parameters are chosen size of each part is correct or not is the key to whether the shape of the bottle, so it is necessary to mold the parison size parameter binding molding a reasonable selection .

The ratio of the height of its thread diameter neck portion (1) PET bottle preform and the mandrel may determine the aspect ratio (L / D). Mandrel aspect ratio value principle is generally not more than 10 than l, this is because the parison mold mandrel is cantilever, and by the effect of high injection pressure during filling. Selected aspect ratio is larger mandrel bent when it is large, is likely to cause the parison wall thickness distribution is uneven, but through the program to control the melt filling speed or filling process, the sliding thimble temporarily fixed core the head end to the mandrel on the mandrel aspect ratio advisable at this time a large value. Preform bottle height is the height reference coefficient obtained by multiplying the height, the height of the bottle is generally 92% -95%. In order to ensure good transparency of the parison, after filling the melt into a parison mold, the temperature was quickly lowered to less 145 ℃, but than the glass transition temperature of the polyester material (82 ℃) higher and closer to the glass temperature, the higher the transparency of blown bottles. Parison mold cooling water temperature up to 10 ℃ -35 ℃, in order to quickly cool the parison, but also take a liquid or gas continuous cooling mandrel, wherein the mandrel cool air can be more uniform temperature distribution, the air pressure is usually about 1MPa.

PET Plastic Bottles Basic Introduction

Custom Plastic Bottle Manufacturers

PET plastic bottles are made of PET polyester material through injection molding, blow molding or extrusion and then after forming, thermoplastic, acid and some other physical properties.

PET plastic bottle is not only widely used for packaging carbonated beverages, water, juice and tea drinks, it is the largest use of beverage packaging, and is widely used in many fields such as food, chemicals, pharmaceuticals and packaging. PET plastic has a wide application in the field of packaging, whether packaging film, sheet, or beer bottles, used PET plastic. But when these materials are discarded, face the problem of how to deal with the annual production of tens of billions of PET plastic bottles only, estimated that by 2005, every year there will be 50 million tons of PET for the manufacture of PET plastic bottles. Therefore, PET plastic bottle recycling can not only solve environmental problems, but also can be used as a new raw material resources, to alleviate the shortage of Chinese PET material contradictions. Yes, the look back China's reform and opening up 30 years, China has made in the economic field despite remarkable achievements, but also to China's environment has brought very serious damage. Water pollution, air pollution, and so on. Has brought to China's economy has shrunk. People have gradually recognized this problem, and the corresponding proposed take road of sustainable development strategy of green GDP, circular economy strategy, and so on a series of measures. Thus, the recycling of PET plastic bottles in line with the reality of problems facing China, for environmental protection, resource conservation, and sustainable development have great benefits.

PET plastic bottles Applications: PET has been used in the majority of the market, like the pharmaceutical industry, mineral water, beverage industry, the pesticide industry, chemical packaging, food packaging, beer and even the future development of the industry, and other fields.

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Defect Analysis of PET Bottles-Surface Whitening

Custom Plastic Bottle Manufacturers , Bottle surface whitening phenomenon

PET bottles through the General Assembly cause partial crystallization bleaching. This phenomenon has three stages, namely, when the preform injection whitening, crystal surface when reheating preforms whitening, whitening oriented crystallization stretching blow. (1) The entire surface of the preform molding whitening and reheating the entire surface of the crystal whitening basic reason as stated in 3.1.1, the degree of crystallinity is higher than the crystallinity of whitened hair dark. But for local preform surface crystallization process genesis block is not the same. When the cooling effect of the mold is very good, regular or irregular crystal parabolic fog may form. This is mainly because each cavity injection speed, pressure, temperature coordination inconsistent results. High-speed, high-pressure injection, and the melt shear gate, generates heat, melt flow is good, the cavity is filled quickly, and rapidly cooled. If because of the injection pressure, low injection speed, primary injection failed to fill the cavity, then the level of the injection stream forward because leaving a bad contact with the mold wall temperature drop is less than the glass transition temperature or less to form a large number of nuclei; when injected with the secondary stream meet, will absorb heat and secondary injection stream atomization crystal shape is regular or irregular parabolic and parabolic thickness of some small, due to the molding temperature The formation of such a parabolic shape low fogging, an appropriate increase in temperature can be eliminated, but repeated experiments show that this argument is wrong. If the primary injection stroke is small to a critical value, raising the temperature until the material decomposition can not eliminate this frosting parabolic shape.

(2) If no whitening in the above case, the reheating phase PET preforms easy to generate the corresponding parts of bulk crystals. Also due to the preform reheat temperature is not the same inside and outside, outside the high in the low, easy to make the surface temperature is too high and crystallize into a mist whitened.

(3) In the stretch blowing stage, due to the fast stretching or cold drawing, to form a whitened stretched crystallized (with information that such a fog as "pearlescent"). Actual production, preform injection molding stage, regulate a secondary injection velocity, an appropriate increase in the melt temperature, can eliminate parabolic (or plane) shapes albino. Reheating stage, using less to make internal and external temperature heating method, such as the use of good quality far infrared heating tube, quartz tube, radio frequency heating is available, if necessary, and as far as possible to shorten the heating time, can reduce the crystallinity bleaching possibility. Caused by the stretching of the crystal can be appropriately reduced speed to avoid stretching.

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Recycled PET Plastic Bottles Used To Do?

 

550ml-sports-water-bottle

    The use of recycled plastic PET: PET plastics recycling particles technology refers to the used PET industrial waste, food packaging containers, waste beverage bottles, after crushing, washing, high vacuum drying, heating plastics, drawing, cooling, building tablets, after processing the resulting PET particles to be re-made PET related products, such as chemical fiber textile raw materials, PET sheet materials, plastic injection molding and other raw materials. At present, domestic and supporting technologies are more perfect, the only weak link is PET recycling particles thickening technology, and can be directly related to thickening of recycled PET granules performance. The project technology breaks through the bottleneck of this technology, as the value of recycled PET particles opens room for improvement. Plastic Water Bottle Manufacturers, PET renewable particles reactive extrusion equipment Condensation core equipment is φ90mmPET renewable particles polycondensation reaction extruder, its main feature is a good solution to the polyester chips molecular chain degradation in the recovery process, the intrinsic viscosity decreases, and input and output ratio unreasonable problems. The application of a series of high-tech equipment, to fully increase the intrinsic viscosity of the PET in the recovery, recycling particle mass increase, to meet the standards of PET new material. Features integrated physical and chemical methods, and in the molten state by adding a chain extender molecules have been degraded chain reaction, re-chains into macromolecules, thus significantly improve the performance of recycled PET granules.
The main innovations are: a high aspect ratio using reactive extrusion machine, PET bottles can significantly increase the intrinsic viscosity; b in the screw extruder to achieve a high vacuum polycondensation reaction with the material to melt. mixing at the same time, significant savings in energy consumption;. c pollution, continuous production, large processing capacity, economic objective.

    Here we talk about "PP woven bag recycling" waste is the bags suitable for the production of plastic waste. This is waste material using a single species, it requires a relatively high, can not be mixed with other varieties of plastic, but can not contain sediment, debris, mechanical impurities, the melt index requirements (not any in the range of 2 - 5 pp plastics are available). Its main sources are the two PP woven bag production process of waste; the second is pp bag recycling waste products, such as fertilizer bags, feed bags, salt bags and so on. Then their regeneration, what does? 1, the regeneration method
It is mainly two kinds of melted pellets and extrusion granulation method, extrusion granulation method most used. Flow both ways follow. (1), the melt agglomeration Scrap - the choice of materials and water - dry - cut strips - high speed pellet (feed - Shrink - water - aggregate) the packaging materials.

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