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    • 5. 发明授权
    • Device for stretching film sections in a monoaxial or biaxial manner
    • 用于以单轴或双轴方式拉伸薄膜部分的装置
    • US08641408B2
    • 2014-02-04
    • US13263174
    • 2010-03-12
    • Heinrich Collin
    • Heinrich Collin
    • B29C51/04B29C51/26
    • B29C55/10B29C55/20
    • The invention relates to a device for stretching film sections in a monoaxial or biaxial manner, preferably by way of a tenter frame, for films made substantially of polymers, wherein a square or rectangular section of a such film is seized at 4 sides by at least two tenter hooks each, designed as regards improved stretching such that the upper tenter hook part (11) is mounted in an articulated fashion on a rotational axis located outside the film to be stretched, and specifically such that the lower, fixed tenter hook part (13) carries the joint, while the upper tenter hook part (11) is designed so as to pivot upwards and at least one cylinder (14) is disposed rotated by 90° for applying the tensioning power and thus applies the tensioning power to the upper pivotable tenter hook part (11).
    • 本发明涉及一种用于以单轴或双轴方式拉伸薄膜部分的装置,优选通过拉幅机架,用于基本上由聚合物制成的薄膜,其中这种薄膜的正方形或矩形部分至少在四边被至少抓住 每个都有两个拉幅机钩,其设计用于改进的拉伸,使得上部拉幅机钩部分(11)以铰接的方式安装在位于待拉伸的膜外部的旋转轴线上,并且具体地使得下部固定的拉幅机钩部件 13)承载接头,而上部拉幅机钩部件(11)被设计成向上枢转,并且至少一个汽缸(14)被设置为旋转90°以施加张紧力,并且因此将张紧力施加到上部 可枢转拉幅机钩部件(11)。
    • 7. 发明授权
    • Methods of manufacture of multiaxially oriented fluoropolymer films
    • 多轴取向氟聚合物膜的制造方法
    • US6099791A
    • 2000-08-08
    • US612742
    • 1996-03-08
    • Donald ShannonJohn McIntyreChris KuoChris McCollamRobert Peterson
    • Donald ShannonJohn McIntyreChris KuoChris McCollamRobert Peterson
    • B29C55/04B29C55/10B29C55/18B29C55/14
    • B29C55/045B29C55/10B29C55/18B29K2027/18
    • Porous fluoropolymer films, such as PTFE films, formed by a method including the steps of (a) forming a fluoropolymer (e.g., PTFE) paste, (b) extruding, calendaring, or otherwise processing the paste to form a film extrudate, (c) causing the film extrudate to be calendared in a first directional axis, (d) subsequently calendaring the film extrudate in a second directional axis which is different from the first directional axis, (e) subsequently calendaring the film extrudate in at least one additional directional axis which is different from said first and second directional axes, thereby forming a multiaxially calendared film extrudate, (f) drying the multiaxially calendared film extrudate, and (g) radially expanding the multiaxially calendared film extrudate to form a radially oriented fluoropolymer (e.g., PTFE) film. The porous fluoropolymer films formed by this method are multiaxially oriented and exhibit isotropic strength properties.
    • (a)形成含氟聚合物(例如,PTFE)糊剂的方法形成PTFE多孔膜等多孔含氟聚合物膜,(b)挤压,压延或以其他方式加工糊料以形成膜挤出物,(c )使得所述膜挤出物在第一方向轴上压延,(d)随后在不同于所述第一方向轴的第二方向轴上压延所述膜挤出物,(e)随后在至少一个另外的方向上压延所述膜挤出物 轴向不同于所述第一和第二方向轴,由此形成多轴压延膜挤出物,(f)干燥所述多轴压延膜挤出物,和(g)使所述多轴压延膜挤出物径向膨胀以形成径向取向的含氟聚合物(例如, PTFE)膜。 通过该方法形成的多孔含氟聚合物膜是多轴取向的并且具有各向同性的强度特性。