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    • 24. 发明申请
    • Articles including expanded polytetrafluoroethylene membranes with serpentine fibrils
    • 制品包括具有蛇纹石原纤维的膨胀聚四氟乙烯膜
    • US20130183515A1
    • 2013-07-18
    • US13351052
    • 2012-01-16
    • Charles F. White
    • Charles F. White
    • B32B27/12B29C67/24
    • B29C55/005B29K2027/18B29K2105/04Y10T428/24994
    • Articles including expanded fluoropolymer membranes having serpentine fibrils are provided. The fluoropolymer membranes exhibit high elongation while substantially retaining the strength properties of the fluoropolymer membrane. The membrane may include a fluoropolymer and/or elastomer. Additionally, the article has an elongation in at least one direction of at least about 100% and a matrix tensile strength of at least about 50 MPa. The article may be formed by (1) expanding a dried, extruded fluoropolymer tape in at least one direction to produce an expanded fluoropolymer membrane and (2) retracting the expanded fluoropolymer membrane in at least one direction of expansion by applying heat or by adding a solvent. The application of a tensile force at least partially straightens the serpentine fibrils, thereby elongating the article. The expanded fluoropolymer membrane may include a microstructure of substantially only fibrils. The membranes may be imbibed with an elastomeric material to form a composite.
    • 提供包括具有蛇纹状原纤维的膨胀的氟聚合物膜的制品。 氟聚合物膜显示高伸长率,同时基本上保持含氟聚合物膜的强度性能。 膜可以包括含氟聚合物和/或弹性体。 此外,制品在至少一个方向上的延伸至少为约100%,基质抗拉强度为至少约50MPa。 制品可以通过以下方式形成:(1)在至少一个方向上膨胀干燥的挤出的含氟聚合物胶带以产生膨胀的含氟聚合物膜,和(2)通过施加热量或通过加入膨胀的氟化聚合物膜在至少一个膨胀方向缩回膨胀的氟聚合物膜 溶剂。 拉伸力的施加至少部分地拉直蛇形原纤维,从而延长制品。 膨胀的氟聚合物膜可以包括基本上只有原纤维的微结构。 膜可以用弹性体材料吸收以形成复合材料。