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    • 9. 发明授权
    • Novel porous fabric
    • 新型多孔织物
    • US4438167A
    • 1984-03-20
    • US204578
    • 1980-11-06
    • Eckhard C. A. Schwarz
    • Eckhard C. A. Schwarz
    • B01D39/08B32B27/12D04H13/00D06N3/00B32B3/10
    • B01D39/083B01D39/1623B32B27/12D04H13/00D06N3/0002B01D2239/0464B01D2239/0622B01D2239/065Y10S428/904Y10S428/91Y10T428/24331Y10T442/3886Y10T442/678
    • There is described a process for producing a novel porous fabric having at least 100,000 surface perforations per square inch by the biaxial stretching at ambient temperatures of a sheet of a composite fiber-film substrate formed by hot calendaring, inter alia, a laminate of a woven or non-woven web of fibers having a residual elongation of at least 40% and a synthetic polymeric film material constituting at least 20% by volume of the composite fiber-film substrate. Stretching of the composite fiber-film substrate is effected by passage through interdigitating grooved rollers having grooves spaced at a distance of less than one millimeter times the web basis weight in grams per square meter with concomitant control of the velocity of introduction of the composite fiber-film substrate into the nip of the grooved rollers to substantially the identical surface velocity of the grooved rollers. Biaxial stretching is effected to at least a stretch ratio such that a web of the fibers and film of the synthetic polymer taken individually and biaxially stretched exhibit a difference of at least 5.degree. in the aqueous contact angle and a difference of at least 5000 psi in the initial tensile modulus. The novel porous fabric is comprised of elongated fibers embedded in a film substrate surface with openings of at least 100,000 perforations per square inch and is useful as a leather substitute, synthetic paper and the like.
    • 描述了一种通过在环境温度下通过热压延形成的复合纤维膜基材片材的双轴拉伸来制造具有至少100,000个每平方英寸的表面穿孔的新型多孔织物的方法,特别是织造的层压材料 或具有至少40%的残余伸长率的纤维的非织造纤维网和构成复合纤维膜基材的至少20体积%的合成聚合物膜材料。 复合纤维膜基材的拉伸是通过交叉沟槽辊进行的,该槽具有间隔距离小于1毫米倍的纤维网基重(克/平方米)的沟槽,同时控制复合纤维膜基材的引入速度, 薄膜基材进入带槽辊的辊隙,使得带槽辊的基本上相同的表面速度。 进行双轴拉伸至少拉伸比,使得单独和双轴拉伸获得的纤维和合成聚合物膜的纤维网在水接触角中表现出至少5°的差异和至少5000psi的差异 初始拉伸模量。 新型多孔织物由嵌入薄膜基材表面的细长纤维组成,其开口至少为每平方英寸100,000个穿孔,并且可用作皮革代用品,合成纸等。