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1 影响因素 （1）可发性聚苯乙烯的性质 聚苯乙烯本身是没有危险性的普通石化产品,但当它被溶入约6-8％易燃的戊烷成可发性聚苯乙烯后就变成了易燃固体。戊烷气体是一种极易燃烧的易燃气体,它的闪点在-49℃以下,爆炸极限1.4-7.8％。极低的闪点和爆炸浓度,决定了戊烷高度的易燃易爆性,同时也使可发性聚苯乙烯归属于一级易燃固体（危险货物编号是41057）。 （2）通用集装箱的特点 通用集装箱的特点一是密封性能良好,二是隔热性差,其装运可发性聚苯乙烯的潜在危险性。良好的密封性使可发性聚苯乙烯析出的戊烷气体不能及时散发到箱外,在箱内底部积聚（戊
1 Influencing Factors (1) Properties of Expandable Polystyrene Polystyrene itself is a non-hazardous ordinary petrochemical product, but when it is dissolved in about 6-8% flammable pentane into an expandable polystyrene After it becomes a flammable solid. Pentane gas is a highly flammable flammable gas with a flash point below -49 ° C and an explosion limit of 1.4-7.8%. The extremely low flash point and explosion concentration determine the flammability and explosiveness of pentane height and at the same time make expandable polystyrene attributed to a flammable solid (Dangerous Goods Code 41057). (2) the characteristics of a common container First, the general characteristics of a container sealing good performance, and second, poor insulation, the shipment of polystyrene can be fatal potential dangers. Good sealing so that the pentane gas can be made of polystyrene can not be timely dissemination out of the box, accumulation in the bottom of the box (E