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what should we pay attention to when pet preform production

what should we pay attention to when pet preform production

2020-11-26

PET raw material processing

Since PET macromolecules contain lipid groups and are hydrophilic to a certain extent, 

the particles are sensitive to water at high temperature. When the water content exceeds 

the limit, the molecular weight of PET in processing will decrease, and the products will 

become colored and brittle.

Therefore, before processing, the material must be dried, its drying temperature is 

150 degrees Celsius, more than 4 hours. Generally 170 degrees Celsius, 3-4 hours. 

The method of empty injection can be used to check whether it is completely dry. 

The proportion of PET recycling generally does not exceed 25%, and the recycling 

thoroughly dry.

welcome to contact with us for more about pet preform production(pet preform mould,pet bottle blowing machine).

whatsapp:0086-13957627151(maggie)

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