The thermoplastic resin is a heat-softened, the cooling performance of the food bag hardening, and no chemical reaction, regardless of the heating and cooling are repeated many times, and can maintain this performance. Where a thermoplastic resin whose molecular structure are considered linear. The thermoplastic resin is a heat-softened, hardened by cooling performance Hefei food bags, and no chemical reaction to produce food bags, both heating and cooling are repeated many times, can maintain this performance. Where a thermoplastic resin whose molecular structure are considered linear. Adding a coloring agent in food production in the plastic bag, make plastic with bright colors and shiny. Colorant pigments and dyes is often used, and sometimes also used to produce a fluorescent or phosphorescent pigment. Adding a coloring agent in plastics, can make plastic with bright colors and shiny. Colorant pigments and dyes is often used, and sometimes also used to produce a fluorescent or phosphorescent pigment. Adding a coloring agent in plastics, can make plastic with bright colors and shiny. Colorant pigments and dyes is often used, and sometimes also used to produce a fluorescent or phosphorescent pigment. Food Bag | linking Bin century | vacuum food bags provided by the United Century Paper Packing Co., Xiong Bin. Xiong Bin-century Paper Packing Co. (www.sjlbbz.com) quality services and products, and are subject to approval and trust of new and old customers and the industry. Our company is a certified member of the whole network Commercial Union, Commercial Union Support icon on the page, you can talk directly to our customer service staff, to our future cooperation happy!