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  • What is the pbt injection temperature

    Discussion in 'Plastic moulding' started by MIA WANG, Sep 24, 2021.

    1. MIA WANG

      MIA WANG Member

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      The injection temperature of pbt is 250 degrees Celsius, the scientific name of pbt is polybutylene terephthalate, and the color of pbt is milky white translucent to opaque, semi-crystalline thermoplastic polyester. The melting temperature of pbt is 225-275 degrees Celsius, but the generally recommended temperature is 250 degrees Celsius. The precautions for pbt injection molding are as follows:

      1. Pbt is very sensitive to the gap, and the thickness of the product should not be too thick.

      2. The molding shrinkage rate of pbt is very large, and the mold needs to be designed to a certain degree of inclination when demolding.

      3. Pbt has low hygroscopicity, but under high temperature conditions, it is more sensitive to moisture. Pbt will degrade during processing, the color will become darker, and the product will have spots on the surface, so it is generally dried.

      4. The pbt material has very good fluidity. During the injection molding process, pay attention to the overflow and the tightness of the injection nozzle.


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