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一、前言泡沫塑料是一种孔状两相材料,小孔中含有空气或其它气体,重量特别轻,一般在0.03～0.4克/厘米~3范围内。泡沫塑料按原材料性质可分热塑性泡沫塑料(如聚苯乙烯,聚氯乙烯,聚乙烯,聚丙烯等);热固性泡沫塑料(如酚醛,环氧,聚氨酯,脲-甲醛,有机硅等)。按泡沫塑料中的泡沫结构可分开孔泡沫塑料(如酚醛等);闭泡沫塑料(如环氧,聚苯乙烯等)。其中脲-甲醛,聚氨酯,有机硅,聚氯乙烯等按发泡的方法不同,可以得到开孔或闭孔两种结构。按泡沫塑料
First, the foreword Foam is a porous two-phase material, pores containing air or other gases, particularly light weight, generally in the range of 0.03 ~ 0.4 g / cm ~ 3. According to the nature of the foam material can be divided into thermoplastic foam (such as polystyrene, polyvinyl chloride, polyethylene, polypropylene, etc.); thermosetting foam (such as phenolic, epoxy, polyurethane, urea - formaldehyde, silicone, etc.). According to the foam structure of the foam can be separated hole foam (such as phenolic, etc.); closed foam (such as epoxy, polystyrene, etc.). Which urea-formaldehyde, polyurethane, silicone, polyvinyl chloride, according to the different methods of foaming, can be open or closed-cell two structures. Press the foam