Commonly used transparent material of the plastic injection mold

Transparent plastic parts materials of plastic injection molding must have high transparency, a certain strength and wear resistance, impact resistance, heat resistance, chemical resistance to be excellent, water absorption to be small, only in this way can meet the requirements of transparency in use and long-term unchanged, commonly used transparent plastic materials in plastic injection mold are:

1. Polymethyl methacrylate (commonly known as argent or plexiglass, code PMMA),

2. Polycarbonate (code PC),

3. Polyethylene terephthalate (code PET),

4. Transparent nylon, ABS

5.AS(Acrylonitrile styrene copolymer),

6. Polysulfone (PSF)

The general requirements of plastic injection products are still based on PMMA, and PET is used in packaging and containers because it has to be stretched to get good mechanical properties.

PMMA viscosity is large, the fluidity is slightly poor, so it must be high material temperature, high injection pressure injection molding, in which the injection temperature influence is greater than the injection pressure, but the injection pressure increase, is conducive to improving the shrinkage of the product. The injection temperature range is wide, the melting temperature is 160℃, and the decomposition temperature is 270℃, so the material temperature adjustment range is wide, and the process is good. Therefore, the fluidity can be improved from the injection temperature. The impact is poor, the wear resistance is not good, the scratching is easy, and the cracking is easy, so the mold temperature should be increased and the condensation process improved to overcome these defects.