Glass Dropper Bottles

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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.