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    • 33. 发明授权
    • Method of making a PTFE based tape suitable for impregnation into a
porous metal matrix
    • 制备适于浸渍到多孔金属基质中的PTFE基胶带的方法
    • US4615854A
    • 1986-10-07
    • US605037
    • 1984-04-30
    • George C. PrattMichael C. Montpetit
    • George C. PrattMichael C. Montpetit
    • F16C33/24B22F7/04C08J5/16C08L1/00C08L27/00C08L27/18C08L27/20C10M111/04C10M173/02C10N10/02C10N10/04C10N10/08C10N30/06C10N40/02C10N50/08F16C33/12F16C33/20B27J5/00
    • B22F7/04F16C33/201F16C33/206
    • The present invention relates to a method of making a tape suitable for impregnation into a porous metal matrix which generally comprises the steps of mixing a liquid dispersion of PTFE with a coagulant to form a paste, placing the paste between a layer of supporting material and a layer of filter paper to form a sandwich, compressing the sandwich, transferring the sandwich to a gauze-like material so that the filter paper layer of the sandwich is adjacent the gauze-like material, applying a vacuum to the gauze-like material and adjacent filter paper layer to remove some excess liquid from the paste, and removing the layer of filter paper from the sandwich to leave a tape comprising PTFE and liquid and a layer of supporting material adjacent the tape. The method of the present invention may be used to apply, by impregnation, a PTFE based composition, which may include various fillers therein, to a porous metal matrix or interlayer. In addition, some of the PTFE based composition may be left above the porous metal interlayer after the impregnation step. After sintering, a composite bearing material which may include a metal backing, a porous metal interlayer on the metal backing, and having the PTFE based composition substantially filling the pores of the porous metal interlayer and forming a surface layer on the bearing material may thereby be produced.
    • 本发明涉及一种制备适于浸渍到多孔金属基质中的胶带的方法,其通常包括以下步骤:将PTFE的液体分散体与凝结剂混合以形成糊料,将糊料放置在支撑材料层和 一层滤纸形成三明治,压制三明治,将三明治转移到纱布状材料上,使得三明治的滤纸层与纱布状材料相邻,向纱布状材料施加真空并将其邻近 滤纸层以从浆料中除去一些多余的液体,并从三明治中除去滤纸层,留下包含PTFE和液体的胶带以及邻近胶带的一层支撑材料。 本发明的方法可以用于通过浸渍将多孔金属基质或中间层中的可以包含各种填料的PTFE基组合物应用于多孔金属基体或中间层。 此外,一些基于PTFE的组合物可以在浸渍步骤之后留在多孔金属中间层上方。 烧结后,可以包括金属背衬的复合轴承材料,金属背衬上的多孔金属中间层,并且基本上填充多孔金属中间层的孔并且在轴承材料上形成表面层的基于PTFE的组合物可以由此 生产。