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    • 36. 发明授权
    • Method of making apertured film fabrics
    • 制作多孔薄膜织物的方法
    • US5207962A
    • 1993-05-04
    • US720543
    • 1991-06-25
    • Edward E. HovisEric D. Johnson
    • Edward E. HovisEric D. Johnson
    • B29D28/00
    • B29D28/00
    • An apertured thermoplastic fabric is formed by extruding a molten thermoplastic polymer film having a secant modulus of no greater than 50,000 psi, embossing the film in a nip provided between a smooth surfaced roll and a patterned roll, wherein the patterned roll includes a plurality of discrete, raised projections disposed in a pattern and each of which includes a sharp distal end; applying sufficient pressure at the nip of the patterned and smooth surfaced rolls for causing a plurality of small apertures to be formed in the extruded film in substantially the same pattern as the pattern of discrete, raised projections; orienting the apertured film in both the cross-machine direction and in the machine-direction, and thereafter embossing the oriented film on at least one surface with a plurality of raised members spaced closer to each other than the spaces between the apertures in the oriented film, to thereby provide a matte-type finish on at least one surface. The formed fabric also forms a part of the present invention.
    • 通过挤出具有不大于50,000psi的割线模量的熔融热塑性聚合物膜来形成多孔热塑性织物,在设置在光滑表面辊和图案化辊之间的辊隙中压印膜,其中图案化辊包括多个离散的 凸出的突出部,其以图案形式设置,每个包括尖锐的远端; 在图案化和光滑的表面辊的辊隙处施加足够的压力,以使得在挤出的膜中形成与分立的凸起突起的图案基本相同的图案的多个小孔; 在纵向和纵向上定向多孔膜,然后在至少一个表面上用定向膜中的孔之间的间隔彼此间隔开的多个凸起构件对取向膜进行压花 ,从而在至少一个表面上提供无光泽的光洁度。 形成的织物也形成本发明的一部分。