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    • 8. 发明授权
    • Dispersion spinning core-shell fluoropolymers
    • 分散纺丝芯 - 壳含氟聚合物
    • US07872073B2
    • 2011-01-18
    • US12019804
    • 2008-01-25
    • Clay Woodward Jones
    • Clay Woodward Jones
    • C08L6/12
    • D01D5/06C08L1/26C08L27/18D01D1/02D01F1/02D01F6/12D01F6/48Y10T428/3154C08L2666/26
    • A process is disclosed for dispersion spinning non-melt-processible fluoropolymer fiber in which a mixture of an aqueous dispersion of non-melt-processible fluoropolymer particles and an aqueous solution of a matrix polymer is formed. The non-melt-processible fluoropolymer particles have an SSG of less than about 2.40 and comprise a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene. The mixture is extruded into a coagulation bath containing a concentration of ions which coagulate the matrix polymer to form an intermediate fiber structure. The intermediate fiber structure is sintered to decompose the matrix polymer and coalesce the non-melt-processible fluoropolymer particles to form the fiber. The present invention also provides a spinning composition useful for the dispersion spinning of non-melt-processible fluoropolymer fiber.
    • 公开了用于分散纺丝不可熔融加工的含氟聚合物纤维的方法,其中形成了不可熔融加工的含氟聚合物颗粒的水性分散体和基质聚合物的水溶液的混合物。 不可熔融加工的含氟聚合物颗粒具有小于约2.40的SSG,并且包含高分子量聚四氟乙烯核和低分子量聚四氟乙烯或改性聚四氟乙烯的壳。 将混合物挤压成含有浓缩离子的凝固浴,其凝结基质聚合物以形成中间纤维结构。 中间纤维结构被烧结以分解基质聚合物并聚结不可熔融加工的含氟聚合物颗粒以形成纤维。 本发明还提供了一种可用于不可熔融加工的含氟聚合物纤维的分散纺丝的纺丝组合物。