SBS zipper

The invention discloses an SBS zipper. The SBS zipper comprises a styrenic block copolymer, a filler, an antioxygen, a stabilizer, a colorant and an impact modifier, the filler is kieselguhr, the antioxygen is 2-hydroxy-4-n-octoxy-benzophenone, the stabilizer is tribasic lead sulfate and bibasic lead sulfate, the colorant is zinc oxide, the impact modifier is methyl methacrylate-butadiene-styrenecopolymer, and the SBS zipper comprises, by weight, 50 parts of the styrenic block copolymer, 35 parts of the polyvinyl chloride resin, 15-25 parts of the kieselguhr, 3-6 parts of the 2- hydroxyl-4-n-octyl oxydiphenyl ketone, 4-6 parts of the tribasic lead sulfate, 2-5 parts of the bibasic lead sulfate, and 2-5 parts the zinc oxide. The zipper takes the SBS as the main ingredient, so that the zipper has the characteristics of both plastics and rubbers, the surface friction coefficient is low, the low temperature performance is good, and the processability is good. 本发明公开了种SBS拉链，包括苯乙烯系嵌段共聚物、填充剂、抗氧剂、稳定剂、着色剂以及抗冲击改质剂，所述填充剂