BPT ASA GF30 Injection Molding Auto Parts

Material:BPT+ASA GF30

What is injection molding?
Injection moulding is a manufacturing process for producing parts by injecting molten material into a mould, or mold. Injection moulding can be performed with a host of materials mainly including metals (for which the process is called die-casting), glasses, elastomers, confections, and most commonly thermoplastic and thermosetting polymers. Material for the part is fed into a heated barrel, mixed (using a helical screw), and injected into a mould cavity, where it cools and hardens to the configuration of the cavity. Injection moulding is widely used for manufacturing a variety of parts, from the smallest components to entire body panels of cars. Advances in 3D printing technology, using photopolymers that do not melt during the injection moulding of some lower-temperature thermoplastics, can be used for some simple injection moulds.

What are the chemical and physical properties of PBT?

PBT is one of the toughest engineering thermoplastic materials. It is a semi-crystalline material with very good chemical stability, mechanical strength, electrical insulation properties and thermal stability. These materials have good stability under a wide range of environmental conditions. PBT has very weak moisture absorption properties. The tensile strength of unreinforced PBT is 50MPa, and the tensile strength of glass additive PBT is 170MPa. Too much glass additives will cause the material to become brittle. PBT; crystallization is very rapid, which will cause bending deformation due to uneven cooling. For materials with glass additives, the shrinkage in the process direction can be reduced, but the shrinkage in the direction perpendicular to the process is basically the same as that of ordinary materials. Generally, the shrinkage rate of materials is between 1.5% and 2.8%. Materials with 30% glass additives shrink between 0.3% and 1.6%. The melting point (225°C) and high-temperature deformation temperature are lower than those of PET materials. The Vicat softening temperature is approximately 170°C. The glass transition temperature (glass trasitio temperature) is between 22°C and 43°C. Due to the high crystallization speed of PBT, its viscosity is very low, and the cycle time of plastic parts processing is generally low.