- Product Details
Food-grade pom is a tough and elastic material that has good creep resistance, geometric stability and impact resistance even at low temperatures. Pom has both homopolymer materials and copolymer materials. Homopolymer materials have good ductility and fatigue strength, but they are not easy to process. Copolymer materials have good thermal and chemical stability and are easy to process. Both homopolymer and copolymer materials are crystalline materials and cannot easily absorb moisture. The high degree of crystallinity of food-grade pom leads to a very high shrinkage rate, which can be as high as 2% to 3.5%. There are different shrinkage rates for a variety of different reinforced materials.
Food-grade pom has good comprehensive performance, high strength, rigidity, good wear resistance, low water absorption, good dimensional stability, but poor thermal stability, easy to burn, easy to age when exposed to the atmosphere, suitable for making wear-reducing wear Parts, transmission parts, and chemical, instrumentation and other parts.
Food grade pom molding performance:
1. Crystallized material, narrow melting range, fast melting and solidification, crystallization occurs when the material temperature is slightly lower than the melting temperature. Medium liquidity. It has low moisture absorption and can be processed without drying.
2. The friction coefficient is low, the elasticity is good, and the surface of the plastic part is prone to wrinkle pattern surface defects.
3. Easily decompose, the decomposition temperature is 240 degrees. Irritating and corrosive gases will occur during decomposition. Therefore, the mold steel should be made of corrosion-resistant materials.