What is food grade polyethylene? How much temperature can it withstand? Will poison be released at 100 degrees Celsius?
食品级聚乙烯是指符合食品包装卫生标准的聚乙烯塑料制品。聚乙烯塑料制品耐受温度为不超过其熔点，高密度聚乙烯熔点范围为132-135℃，低密度聚乙烯熔点较低（112℃）且范围宽。100度时不会释放毒物。
Food grade polyethylene refers to polyethylene plastic products that meet the hygiene standards for food packaging. Polyethylene plastic products can withstand temperatures that do not exceed their melting point. High density polyethylene has a melting point range of 132-135 ℃, while low density polyethylene has a lower melting point (112 ℃) and a wide range. No toxins will be released at 100 degrees Celsius.
聚乙烯（polyethylene ，简称PE）是乙烯经聚合制得的一种热塑性树脂。在工业上，也包括乙烯与少量α-烯烃的共聚物。聚乙烯无臭，无毒，手感似蜡，具有优良的耐低温性能（最低使用温度可达-100~-70°C），化学稳定性好，能耐大多数酸碱的侵蚀（不耐具有氧化性质的酸）。
Polyethylene (PE) is a thermoplastic resin obtained by polymerization of ethylene. In industry, it also includes ethylene and a small amount of α- Copolymers of olefins. Polyethylene is odorless, non-toxic, wax like in hand, has excellent low temperature resistance (the minimum use temperature can reach - 100~- 70 ° C), good chemical stability, and can withstand the erosion of most acids and bases (not resistant to oxidizing acids).
常用聚乙烯可分为低密度聚乙烯（LDPE）、高密度聚乙烯（HDPE）和线性低密度聚乙烯（LLDPE）。三者当中，HDPE有较好的热性能、电性能和机械性能，而LDPE和LLDPE有较好的柔韧性、冲击性能、成膜性等。LDPE和LLDPE主要用于包装用薄膜、农用薄膜、塑料改性等，而HDPE 的用途比较广泛，薄膜、管材、注射日用品等多个领域。
Commonly used polyethylene can be divided into low-density polyethylene (LDPE), high-density polyethylene (HDPE), and linear low-density polyethylene (LLDPE). Among the three, HDPE has good thermal, electrical, and mechanical properties, while LDPE and LLDPE have good flexibility, impact properties, and film forming properties. LDPE and LLDPE are mainly used for packaging films, agricultural films, plastic modification, etc., while HDPE is widely used in various fields such as films, pipes, injection daily necessities, etc.
聚乙烯常温下不溶于一般溶剂，70℃以上可少量溶解于甲苯、乙酸戊酯、三氯乙烯等溶剂中。吸水性小，电绝缘性优良。
Polyethylene is insoluble in general solvents at room temperature, but can dissolve in small amounts in solvents such as toluene, amyl acetate, and trichloroethylene above 70 ℃. Low water absorption and excellent electrical insulation.
