What are the Post Processing Steps in the PET Plastic Manufacturing Processes?

Post molding treatments may be required in PET plastic manufacturing processes to improve performance and quality. These mainly include the following methods:

1. Annealing:

Purpose: To eliminate internal stress and improve dimensional stability.

Method: For high precision engineering parts (such as gears and bearings), heat treatment at 120-150℃ for 2-4 hours.

2. Surface Treatment:

Purpose: To improve the wear resistance and barrier properties of the product.

Method: Plasma spraying or UV coating, etc.

3. Drying Treatment (for specific situations):

Purpose: If the product's performance deteriorates due to moisture during molding (e.g., discoloration, brittleness), drying treatment is necessary.

Method: Drying temperature is generally 150-170℃, time 3-4 hours, ensuring a moisture content ≤0.005%.

Qingdao Xueyu Molding Products Co., Ltd. is mainly engaged in the design and manufacturing of injection molds, injection molding and secondary processing (spraying, pad printing, ultrasonic welding, stamping), etc. For more information about PET plastic manufacturing process, please contact us.

Website: www.xyzmould.com

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