吸食饮料等使用的塑料管(以下简称软管),大多数都是以聚丙烯为材料,经加工成型后制成的透明或半透明、直径4～6mm的细管,市售品的长度,一般为130～210mm,使用温度在-20℃～+100℃,软管对于所有的酸和碱都是极稳定的,也有很好的耐有机溶剂性,但在受热情况下,却能被四氯化碳、三氯乙烯等氯化烃所侵蚀,但受芳香烃的影响则很少。 Most of the plastic pipes used for drinking beverages (hereinafter referred to as hoses) are made of polypropylene, and they are made of transparent or translucent, thin tubes of 4 to 6 mm in diameter, and they are commercially available. Generally 130 ~ 210mm, use temperature -20 °C ~ +100 °C, the hose is very stable for all acids and bases, but also has good resistance to organic solvents, but in the case of heat, it can be four Eroded by chlorinated hydrocarbons such as chlorocarbons and trichloroethylene, but rarely by aromatic hydrocarbons.