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    • 9. 发明授权
    • Process for making fluoropolymer composites
    • 制备含氟聚合物复合材料的方法
    • US5470409A
    • 1995-11-28
    • US279384
    • 1994-07-25
    • Clifford K. DeakyneGregory P. Weeks
    • Clifford K. DeakyneGregory P. Weeks
    • C08J3/00C08J3/205D21H13/14D21H13/50D21F11/02B29C59/02D21J1/06
    • C08J3/2053C08J3/00D21H13/14D21H13/50C08J2327/12
    • A process for the production of structural and semi-structural composites formed by compressing planar layers of nonwoven preform materials formed from aqueous blends of reinforcing fibers and thin thermoplastic fluoropolymer flake. The flakes have an irregular periphery with microfibrils extending therefrom, having a Canadian Standard Freeness of from 800 to 883. The planar layers which are unconstrained in the in-plane direction are preconsolidated by heating the layer to above the melting point of the fluoropolymer, the applying pressure normal to the plane of the layer causing the fluoropolymer to flow thus orienting the fibers in the plane of the layer. The composites are useful in applications which require higher strength and/or modulus, and where chemical and/or heat resistance is needed, as in chemical processing.
    • 通过压缩由增强纤维和薄的热塑性氟聚合物薄片的水性共混物形成的非织造预成型材料的平面层而形成的结构和半结构复合材料的生产方法。 薄片具有不规则的周边,微原纤维从其延伸,具有800-883的加拿大标准打浆度。通过将该层加热到含氟聚合物的熔点以上,在平面内方向上不约束的平面层被预先固结, 施加垂直于层的平面的压力,导致含氟聚合物流动,从而使纤维在层的平面中定向。 复合材料可用于需要更高强度和/或模量的应用,并且在化学加工中需要化学和/或耐热性。