供应长春防渗膜工程防渗膜规格经销
“158-*-0538--4024 厂家直销 价格低 质量保证”长春防渗膜工程防渗膜规格经销
土工膜以塑料薄膜作为防渗基材,与无纺布复合而成的土工防渗材料,它的防渗性能主要取决于塑料薄膜的防渗性能。目前,国内外防渗应用的
塑料薄膜,主要有聚氯乙烯(pvc)和聚乙烯(pe)、eva(乙烯/醋酸乙烯共聚物),隧道应用中还有设计使用ecb(乙烯乙酸乙烯改性沥青共混土工膜)
的,它们是一种高分子化学柔性材料,比重较小,延伸性较强,适应变形能力高,耐腐蚀,耐低温,抗冻性能好。“158-*-0538--4024 厂家
直销 价格低 质量保证”
其主要机理是以塑料薄膜的不透水性隔断土坝漏水通道,以其较大的抗拉强度和延伸率承受水压和适应坝体变形;而无纺布亦是一种高分子短纤
维化学材料,通过针刺或热粘成形,具有较高的抗拉强度和延伸性,它与塑料薄膜结合后,不仅增大了塑料薄膜的抗拉强度和抗穿刺能力,而且
由于无纺布表面粗糙,增大了接触面的摩擦系数,有利于复合土工膜及保护层的稳定。同时,它们对细菌和化学作用有较好的耐侵蚀性,不怕酸
、碱、盐类的侵蚀,在避光使用情况下,使用寿命长。“158-*-0538--4024 厂家直销 价格低 质量保证”
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