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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.
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