The Transparency Of The Pet Bottle Preform Is Very Important

The transparency of Pet Bottle Preform is very important. Good PET preform transparency determines its sales. However, many customers may encounter problems with unclear PET preforms and poor transparency of PET preforms. How to solve the problem of preform mold transparency.
There are three main reasons why PET preforms do not have good transparency.
1. PET preforms do not have good transparency because the material is not dry enough.
2. The thickness of the PET preform is too thick, or the cooling is not enough. The barrel is mixed with other plastic materials. If the temperature of the plastic is too high, the transparency of the PET preform may be poor. We can dry the PET material for more than 4 hours. At the time of injection, the temperature of the plastic rises and the screw rolls speed up. It must be ensured that the humidity is less than 0.02% at 165 °C.
3. At the beginning, the PET preform has good transparency and the preform is then unclear. Because the temperature is too high when demoulding. Please use more cooling water and cooling time.
If you don’t know how to solve the transparency problem of 5-gallon Pet Preform mold, please feel free to contact me.


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