PVC防水卷材的配方研究

Study on Formulation of Waterproof Rolled PVC Sheet

研究了利用废旧软聚氯乙烯回收料(旧料)生产PVC塑料防水卷材的配方及其对卷材拉伸性能的影响。结果表明,PVC塑料卷材的拉伸强度和断裂伸长率随PVC树脂添加比例增加而提高,而相同添加量的SG-3型PVC树脂比SG-5型PVC树脂的拉伸性能高；在试验范围内,增塑剂用量增加,卷材的拉伸强度降低,伸长率先升后降；添加CPE能提高PVC卷材伸长率,但拉伸强度有所下降。当CaCO_3用量低于20份时,卷材的拉伸强度和伸长率随CaCO_3添加量增加而提高。PVC防水卷材的优选配方(质量份)：旧料85份,PVC树脂(SG-3型)15份,DOP 5份,CPE 3份,稳定剂(TLS)0．6份,其它助剂适量。

The formulation for the production of waterproof roiled PVC sheet by utilizing waste soft PVC and the effects of some ingredients on the tensile properties of the roiled sheet were studied. The results showed the tensile strength and elongation at break of the sheet increased with the increase of the content of PVC resin, and the tensile： properties of the sheet added with SG-3 PVC resin were better than those of the sheet added with SG-5 PVC resin. In the range of test data, the tensile strength of the sheet decreased with the increase of the content of plasticizer, while the elongation at break increased at first and then decreased finally. The elongation of the sheet was improved by the addition of CPE, which might cause a decrease of the tensile strength of the sheet. When CaCO3 content was less than 20 phr, the tensile strength and elongation of the sheet increased with the increase of CaCO3 content. The optimum formulation for the production of waterproof rolled PVC sheet was that waste PVC 85 PHR, SG- 3 PVC resin 15 PHR, DOP 5 PHR, CPE 3 PHR, TLS stabilizer 0.6 PHR （all by mass fraction） and proper contents of other additives.