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    Method of making laminated PTFE-containing composites and products thereof
    1.
    发明授权
    Method of making laminated PTFE-containing composites and products thereof 失效
    制备层压PTFE复合材料及其制品的方法

    公开(公告)号：US5141800A

    公开(公告)日：1992-08-25

    申请号：US719689

    申请日：1991-06-25

    申请人： John A. Effenberger ,  Francis M. Enzien ,  Frank M. Keese ,  Keith G. Koerber

    发明人： John A. Effenberger ,  Francis M. Enzien ,  Frank M. Keese ,  Keith G. Koerber

    IPC分类号： B29C65/00 ,  B32B7/04 ,  C08J5/12 ,  H05K1/03

    CPC分类号： C08J5/121 ,  B29C65/02 ,  B29C66/45 ,  B29C66/71 ,  B29C66/7292 ,  B32B7/04 ,  B29K2027/18 ,  B29L2009/00 ,  H05K1/034 ,  H05K1/036 ,  Y10T428/31544 ,  Y10T428/31678 ,  Y10T428/31699 ,  Y10T428/31913 ,  Y10T442/365 ,  Y10T442/3878

    摘要： Dispersion polymerized PTFE itself, if provided in an unfused state, is sufficiently capable of acting as a pressure sensitive adhesive to facilitate the formation of an initial mechanical bond between components of a laminate such that it may be subsequently heat treated in a relatively short period of time to produce a well-bonded final laminate. This fact makes it possible to prepare a laminate comprising at least one layer containing PTFE by the steps of:(a) preparing a first dimensionally stable laminate component having two major surfaces, at least one of said major surfaces having an exposed layer comprising unfused PTFE;(b) preparing a second dimensionally stable laminiate component having two major surfaces, at least a first of said major surfaces being capable of forming an integral bond with the unfused PTFE-containing layer;(c) bringing said first and second laminate components together so that the exposed layer comprising unfused PTFE and the surface bondable with the unfused PTFE-containing layer are in contact with each other;(d) applying pressure to the combined laminate components at moderate temperature to achieve intimate contact and form a mechanical bond between the first and second laminate components;(e) introducing the mechanically bonded to a heating zone under conditions which avoid delamination; and(f) sintering the mechanically bonded laminate components in a heating zone to consolidate the unfused PTFE-containing layer. The mechanical bond formed is sufficiently strong that the consolidation can be done in a free-sintering process (no applied pressure). Application of pressure, however, is generally not detrimental to the product.

    摘要翻译： 分散聚合的PTFE本身（如果以未熔融状态提供）足够能够用作压敏粘合剂，以便于在层压体的组分之间形成初始机械粘合，使得其随后可以在较短时间内进行热处理 时间来生产良好结合的最终层压板。 该事实使得可以通过以下步骤制备包含至少一层含PTFE的层压材料：（a）制备具有两个主表面的第一尺寸稳定的层压组件，所述主表面中的至少一个具有包含未填充PTFE ; （b）制备具有两个主表面的第二尺寸稳定的层叠构件，所述主表面中的至少第一表面能够与未熔合的含PTFE层形成整体结合; （c）使所述第一和第二层压部件一起接合，使得包含未熔合的PTFE的暴露层和与未熔合的含PTFE层接合的表面彼此接触; （d）在中等温度下对组合的叠层组件施加压力以实现紧密接触并在第一和第二层压组件之间形成机械结合; （e）在避免分层的条件下引入机械结合到加热区; 和（f）在加热区中烧结机械粘结的层压组件以固结未熔合的含PTFE层。 形成的机械结合足够强，可以在自由烧结过程（无施加压力）下进行固结。 然而，施加压力通常不会对产品产生不利影响。