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37 条记录 (耗时 0.018 秒)

    Bulky polytetrafluoroethylene filament and split yarn, method of producting thereof, method of producing cotton-like materials by using said filament or split yarn and filter cloth for dust collection
    31.
    发明授权
    Bulky polytetrafluoroethylene filament and split yarn, method of producting thereof, method of producing cotton-like materials by using said filament or split yarn and filter cloth for dust collection 失效
    大体积聚四氟乙烯长丝和裂缝纱，其制造方法，通过使用所述细丝或分裂纱和用于集尘的滤布生产棉状材料的方法

    公开(公告)号：US6133165A

    公开(公告)日：2000-10-17

    申请号：US765336

    申请日：1996-12-23

    申请人： Shinji Tamaru ,  Katsutoshi Yamamoto ,  Jun Asano

    发明人： Shinji Tamaru ,  Katsutoshi Yamamoto ,  Jun Asano

    IPC分类号： B01D39/16 ,  D01F6/12 ,  D04H1/4382 ,  D04H13/02 ,  D02G3/00 ,  B32B27/00

    CPC分类号： D04H13/02 ,  B01D39/1692 ,  D01F6/12 ,  Y10T428/2913 ,  Y10T428/2973 ,  Y10T428/31544 ,  Y10T442/20 ,  Y10T442/2008

    摘要： The split PTFE yarn and PTFE filament which are bulky and excellent in the feeling and have good intermingling property can be obtained and the cotton-like PTFE materials can be produced therefrom efficiently at a low percentage of dropped fibers. Further the filter cloth for dust collection which is obtained from those cotton-like materials has a high collection efficiency. The present invention can provide the split yarn having a network structure and obtained by splitting a uniaxially stretched PTFE film in the stretched direction with a needle blade roll; the filament having branches and obtained by cutting the network structure of the split yarn in a longitudinal direction; the methods of production thereof; the method of producing the cotton-like materials by cutting the split yarn or filament and then opening; and a filter cloth for dust collection obtained from the cotton-like materials.

    摘要翻译： PCT No.PCT / JP95 / 01275 Sec。 371日期：1996年12月23日 102（e）日期1996年12月23日PCT归档1995年6月26日PCT公布。 出版物WO96 / 00807 日期1996年1月11日可以获得体积大，混合性优异的PTFE聚四氟乙烯丝和PTFE丝，并且能够以低百分比的滴落纤维有效地生产棉状PTFE材料。 此外，从这些棉质材料获得的用于集尘的滤布具有高收集效率。 本发明可以提供一种具有网状结构的裂缝纱线，其通过用针叶辊在拉伸方向上分裂单向拉伸PTFE膜而获得; 所述长丝具有分支并且通过沿纵向切割所述分割纱线的网状结构而获得; 其生产方法; 通过切割分割的纱线或细丝然后打开来生产棉状材料的方法; 和由棉状材料制成的用于集尘的滤布。

    Semisintered polytetrafluoroethylene article and production thereof
    34.
    发明授权
    Semisintered polytetrafluoroethylene article and production thereof 失效
    半聚四氟乙烯制品及其制备

    公开(公告)号：US4596837A

    公开(公告)日：1986-06-24

    申请号：US642770

    申请日：1984-08-21

    申请人： Katsutoshi Yamamoto ,  Shoji Kawachi

    发明人： Katsutoshi Yamamoto ,  Shoji Kawachi

    IPC分类号： B29C47/00 ,  B29C55/00 ,  B29C55/12 ,  B29C67/04 ,  C08J5/18 ,  C08J9/00 ,  C08J9/24

    CPC分类号： C08J5/18 ,  B29C47/0004 ,  B29C55/005 ,  B29C55/12 ,  B29C67/04 ,  C08J9/00 ,  B29C47/0021 ,  B29K2027/18 ,  C08J2327/18 ,  Y10S521/919

    摘要： A semisintered polytetrafluoroethylene article which is prepared by heating an unsintered polytetrafluoroethylene article at a temperature of at least the melting point of a sintered polymer, the article having an endothermic curve at a temperature of 345.+-.5.degree. C. on a crystalline melting chart measured with a differential scanning carolimeter and a crystalline conversion of from 0.10 to 0.85 defined by heat of fusion of the unsintered, semisintered and sintered polymer, and the crystallinity of the semisintered article measured by X-ray diffraction being from 80 to 93%. The article is expandable biaxially to afford a porous polytetrafluoroethylene material having an almost unporous surface.

    摘要翻译： 一种半烧结聚四氟乙烯制品，其通过在至少烧结聚合物的熔点的温度下加热未烧结的聚四氟乙烯制品而制备，该制品在345 +/- 5℃的温度下具有在结晶熔融图上的吸热曲线 用差示扫描量热计测定，通过未烧结，半烧结和烧结聚合物的熔化热定义为0.10至0.85的结晶转化率，通过X射线衍射测得的半烧结制品的结晶度为80-93％。 该制品可双轴膨胀以提供具有几乎无孔表面的多孔聚四氟乙烯材料。

    Process for preparing filler-containing polytetrafluoroethylene fine powder
    36.
    发明授权
    Process for preparing filler-containing polytetrafluoroethylene fine powder 失效
    制备含填料的聚四氟乙烯细粉的工艺

    公开(公告)号：US4440879A

    公开(公告)日：1984-04-03

    申请号：US235622

    申请日：1981-02-18

    申请人： Shoji Kawachi ,  Katsutoshi Yamamoto ,  Shinichiro Kai

    发明人： Shoji Kawachi ,  Katsutoshi Yamamoto ,  Shinichiro Kai

    IPC分类号： C08J3/16 ,  C08J3/215 ,  C08K3/24 ,  C08L27/18 ,  C08L27/20

    CPC分类号： C08J3/215 ,  C08J2327/18 ,  Y10S524/904

    摘要： A process for preparing filler-containing polytetrafluoroethylene fine powder which comprises mixing together an aqueous dispersion of particles of polytetrafluoroethylene and an aqueous dispersion of particles of a filler adsorbed with polyvalent cation at the surfaces so as to be charged positively in the presence of an anionic surfactant and a water-immiscible organic liquid to coagulate the polytetrafluoroethylene particles and the filler particles in combination and recovering the coagulated particles from the resultant dispersion mixture, said filler particles being per se chargeable negatively in water.

    摘要翻译： 一种制备含填料的聚四氟乙烯细粉的方法，其包括将聚四氟乙烯颗粒的水分散体和吸附有多价阳离子的填料的颗粒的水分散体混合在一起，以在阴离子表面活性剂的存在下带正电 和与水不混溶的有机液体，将聚四氟乙烯颗粒和填料颗粒组合起来，从所得分散混合物中回收凝结颗粒，所述填料颗粒本身在水中是负性的。

    Polytetrafluoroethylene fine powder and process for producing the same
    37.
    发明授权
    Polytetrafluoroethylene fine powder and process for producing the same 失效
    聚四氟乙烯细粉及其制造方法

    公开(公告)号：US4159370A

    公开(公告)日：1979-06-26

    申请号：US850539

    申请日：1977-11-11

    申请人： Shun Koizumi ,  Shigeru Ichiba ,  Tetsuo Simizu ,  Chuzo Okuno ,  Tosinori Kadowaki ,  Katsutoshi Yamamoto

    发明人： Shun Koizumi ,  Shigeru Ichiba ,  Tetsuo Simizu ,  Chuzo Okuno ,  Tosinori Kadowaki ,  Katsutoshi Yamamoto

    IPC分类号： C08F14/00 ,  C08F2/00 ,  C08F2/16 ,  C08F2/18 ,  C08F14/26 ,  C08F214/26 ,  C08J3/12 ,  C08F114/26

    CPC分类号： C08F14/26

    摘要： Polytetrafluoroethylene fine powders which have an average molecular weight of not less than 5,000,000, preferably not less than 5,500,000, an amorphous index of not more than 0.1, preferably not more than 0.09, a number average primary particle size of 0.1 to 0.4 micron, preferably 0.15 to 0.38 micron, and a sharp endothermic peak at a temperature between 343.degree. C. and 350.degree. C. on the melting diagram by a differential scanning calorimeter, said sharp peak having an endothermic ratio of not more than 0.3, preferably not more than 0.27, and a half value width of the endothermic peak of not more than 8 degrees, preferably not more than 6 degrees, and a process for producing the polytetrafluoroethylene fine powders. The polytetrafluoroethylene fine powders have an excellent stretchability and are useful for electric wire coating, small diameter tubes, large diameter tubes, sealing tapes and the like.

    摘要翻译： 平均分子量不小于5,000,000，优选不小于5,500,000的聚四氟乙烯细粉末，数均一次粒径为0.1〜0.4微米，优选为0.15以下的无定形指数为0.1以下，优选为0.09以下 通过差示扫描量热计在熔点上在343℃和350℃之间的温度下具有尖锐的吸热峰，所述尖峰的吸热比不大于0.3，优选不大于0.27 ，吸热峰的半值宽度为8度以下，优选为6度以下，以及聚四氟乙烯细粉的制造方法。 聚四氟乙烯细粉末具有优异的拉伸性，可用于电线涂布，小直径管，大直径管，密封带等。