钢丝复合管用聚丙烯粘接树脂的可靠性研究

Study on the reliability of polypropylene adhesive resin for steel wire composite pipe

以马来酸酐接枝聚丙烯、聚丙烯管道专用料和弹性体为原料,制备了聚丙烯粘接树脂。通过力平衡法设计聚丙烯钢丝管增强层的钢丝配制,将聚丙烯粘接树脂用于聚丙烯钢丝管的复合。通过剥离试验、压扁试验、高低温循环、爆破试验以及静液压试验研究了聚丙烯粘接树脂对聚丙烯钢丝复合管粘接的可靠性。研究结果表明:聚丙烯粘接树脂对钢丝粘接的室温和80℃的剪切强度分别为24.1和15.6 MPa;管材的剥离强度为19.1 N/mm;压扁试验、高低温循环试验证实,聚丙烯粘接树脂对管材芯管、外层及增强层钢丝表现出良好的粘接效果。聚丙烯钢丝管的爆破压力为9.36 MPa,达到了爆破压力大于3倍公称压力的要求。聚丙烯钢丝管通过了20℃/3 PN/1 h静液压测试,说明聚丙烯粘接树脂对聚丙烯钢丝管表现出优异的复合效果。

Polypropylene adhesive resin was prepared by using maleic anhydride grafted polypropylene,polypropylene pipeline specific materials,and elastomers as raw materials.The steel wire configuration of the reinforcement layer of polypropylene steel wire pipe was designed by force balance method,and the polypropylene adhesive resin was used for the composite of polypropylene steel wire pipe.The reliability of polypropylene adhesive resin to polypropylene steel wire composite pipes was studied through peeling test,flattening test,high and low temperature cycling,blasting test,and static hydraulic pressure test.The research results showed that,the shear strengths of polypropylene adhesive resin for steel wire bonding at room temperature and 80℃were 24.1 and 15.6 MPa,respectively.The peel strength of the pipe was 19.1 N/mm.Flattening test and high and low temperature cycling test confirmed that polypropylene adhesive resin had good bonding effect on the steel wire of the core tube,outer layer,and reinforcement layer of the pipe.The burst pressure of polypropylene steel wire pipe was 9.36 MPa,which met the requirement of a burst pressure greater than 3 times the nominal pressure.The polypropylene steel wire pipe passed the 20℃/3 PN/1 h static hydraulic pressure test,indicating that the polypropylene adhesive resin exhibited excellent composite effect on the polypropylene steel wire pipe.