Problem to be solved: to describe a porous aerated stretched PTFE composite having improved mechanical and thermal properties.The node and the fibrous structure of the stretched PTFE are coated with a suitably selected polymer on the node and the fibrillation structure or in the structure to provide a property improvement while maintaining porosity.The coating polymer content of the composite is maintained at 3 to 25 mass% of the composite and the area mass of the composite is less than 75 g / m2.Exemplary improvements to the characteristics include, for example, that the air flow is less than 500 girlie seconds and the average tensile strength (ATS) (MPA) x z intensity (MPA) is 50 MPa or more, preferably 100 MPa or more.A coating polymer having appropriate temperature tolerance provides a composite material exhibiting less than 10% of shrinkage rate at an air stream of less than 500 girlie seconds and at temperatures up to 300.degree. C.Diagram
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机译：要解决的问题：描述具有改善的机械和热性能的多孔充气拉伸PTFE复合物。The node and the fibrous structure of the stretched PTFE are coated with a suitably selected polymer on the node and the fibrillation structure or in the structure to provide a property improvement while maintaining porosity.The coating polymer content of the composite is maintained at 3 to 25复合材料的质量％和复合材料的面积质量小于75g / m2.例如，该特性的改进包括，例如，空气流量小于500毫秒和平均拉伸强度（ATS）（MPa ）XZ强度（MPa）为50MPa或更高，优选100MPa或更高。具有适当温度耐受性的涂层聚合物提供了在小于500毫秒和温度下的空气流下的复合材料。最多300°。 c.diagram.
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