公开(公告)号：US06270707B1

公开(公告)日：2001-08-07

申请号：US09145284

申请日：1998-09-02

申请人： Yoshinori Hori ,  Toshinori Kadowaki ,  Hiroyuki Yoshimoto ,  Kyohiro Kang

发明人： Yoshinori Hori ,  Toshinori Kadowaki ,  Hiroyuki Yoshimoto ,  Kyohiro Kang

IPC分类号： B29C4710

CPC分类号： C08J5/18 ,  B29C47/0004 ,  B29C47/0016 ,  B29C47/0021 ,  B29C47/54 ,  B29C55/005 ,  B29C55/18 ,  B29K2027/18 ,  B29K2105/16 ,  B29K2995/0005 ,  C08J2327/18

摘要： This invention concerns a method of manufacturing a highly conductive polytetrafluoroethylene sheet; a method of manufacturing a highly conductive unsintered polytetrafluoroethylene sheet: and a method of manufacturing a highly conductive sintered sheet. In the first method, a paste of polytetrafluoroethylene powder admixed with conductive substance and extrusion lubricant is extruded to preform an unsintered tube-like material, and at least one place on the circumference of this extruded material, the material is cut open longitudinally and the resulting sheet is calendered if necessary. The second method includes a sintering process for the sheet. This invention also concerns a highly conductive polytetrafluoroethylene sheet having a wide-width and long-length, which is obtained by the above-mentioned method. This sheet is not less than 170 mm in width and has variance of volume resistivity (conductivity) in the longitudinal direction, 10% or less, preferably 7% or less in the cross direction. This invention can provide a highly conductive wide-type PTFE sheet whose conductivity in the longitudinal direction is nearly uniform in the cross direction.

摘要翻译： 本发明涉及一种制造高导电性聚四氟乙烯片材的方法; 高导电性未烧结聚四氟乙烯片的制造方法以及高导电性烧结片的制造方法。 在第一种方法中，挤出与导电物质和挤出润滑剂混合的聚四氟乙烯粉末的糊料，以预成型未烧结的管状材料，并且在该挤出材料的圆周上至少有一个位置，将材料纵向切开， 如果需要，片材被压延。 第二种方法包括用于片材的烧结过程。 本发明还涉及通过上述方法获得的具有宽宽度和长度的高导电性聚四氟乙烯片。 该片材的宽度不小于170mm，并且在纵向方向上的体积电阻率（电导率）的差异为10％以下，优选为横向的7％以下。 本发明可以提供一种导电性宽的PTFE片，其纵向的导电性在横向上几乎均匀。