Crosslinking type polyvinyl chloride/thermoplastic polyurethane light foaming material and preparation method thereof

交联型聚氯乙烯/热塑性聚氨酯轻质发泡材料及制备方法

Abstract

The invention provides a crosslinking type polyvinyl chloride light foaming material and a preparation method of the crosslinking type polyvinyl chloride light foaming material. The foaming material consists of 100 by weight of polyvinyl chloride, 1 to 20 by weight of thermoplastic polyurethane, 1 to 20 by weight of foaming agents, 1 to 10 by weight of auxiliary foaming agents, 1 to 5 by weight of nucleating agents, 0.1 to 2.0 by weight of crosslinking agents, 1 to 30 by weight of plasticizing agents and 1 to 10 by weight of stabilizing agents, and in addition, the foaming material is prepared through preplastification, melting plastication, chemical crosslinking and chemical foaming. The foaming material has the apparent density being 25 to 100 kg/m<3>, the material thickness being 1 to 8mm, the bending strength being 5 to 20 MPa, the tensile strength being 15 to 25 MPa and the impact strength being 5 to 10 KJ/M<2>. The micro-crosslinking foam plastic provided by the invention has the advantages that the foam hole is uniform and controllable, the foaming ratio is high, the size stability is good, the physical performance and the mechanical strength are excellent, and the micro-crosslinking foam plastic is suitable for being made into large-scale foaming products.
本发明提供了一种交联型聚氯乙烯轻质材料及其制备方法。该发泡塑料按重量计,由聚氯乙烯100份、热塑性聚氨酯1~20份、发泡剂1~20份、助发泡剂1~10份、成核剂1~5份、交联剂0.1~2.0份、增塑剂1~30份、稳定剂1~10份组成;并通过预塑化,熔融塑炼,化学交联及化学发泡而制得。该发泡塑料表观密度为25~100kg/m3,材料厚度为1~8mm,弯曲强度5~20MPa,拉伸强度15~25MPa,冲击强度5~10KJ/M2。本发明提供的可微交联的泡沫塑料泡孔均匀可控、发泡倍率高、尺寸稳定性好,具有优异的物理性能、力学强度,适合做大型发泡制品。

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