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    • 42. 发明授权
    • Fluororesin composition and covered electric wire
    • 氟树脂组成和覆盖电线
    • US08143351B2
    • 2012-03-27
    • US12674070
    • 2008-09-24
    • Keizo ShiotsukiHideki KonoKenji IshiiKengo ItoKenjiro TanimotoTakahiro Kitahara
    • Keizo ShiotsukiHideki KonoKenji IshiiKengo ItoKenjiro TanimotoTakahiro Kitahara
    • C08L27/12
    • C08J3/12C08F8/22C08J3/16C08J3/226C08J2327/18C08J2427/00C08L27/18C08L2205/02H01B3/445C08L2666/04
    • It is an object of the present invention to provide a fluororesin composition which hardly causes molding defects even when high-speed molding is performed in covering extrusion molding within a relatively broad molding temperature range and which can give covered electric wires, in particular foamed electric wires, excellent in surface smoothness.A fluororesin composition comprising a polytetrafluoroethylene [PTFE] having a standard specific gravity of 2.15 to 2.30 and a tetrafluoroethylene/hexafluoropropylene-based copolymer [FEP], the content of said PTFE being 0.01 to 3 parts by mass per 100 parts by mass of said FEP and the alkali metal content being not higher than 5 ppm on the resin composition solid matter basis, wherein said composition is obtained by a method comprising the step (1) of obtaining a cocoagulated fluororesin powder by mixing an aqueous dispersion containing said FEP and an aqueous dispersion containing said PTFE together, followed by coagulation, the step (2) of melt extruding the cocoagulated powder and the step (3) of subjecting the extrusion product to treatment for stabilizing unstable terminal groups in said PTFE and FEP.
    • 本发明的目的是提供即使在相对宽的成型温度范围内覆盖挤压成型进行高速成型时也难以引起成型缺陷的氟树脂组合物,其可以形成被覆电线,特别是发泡电线 表面平滑度优异。 一种含有标准比重为2.15〜2.30的聚四氟乙烯[PTFE]和四氟乙烯/六氟丙烯系共聚物[FEP]的氟树脂组合物,所述PTFE的含量相对于100质量份所述FEP为0.01〜3质量份 碱性金属含量在树脂组合物固体物质上不高于5ppm,其中所述组合物通过包括步骤(1)的方法获得,所述方法包括通过将含有所述FEP的水性分散体和水溶液 将所述PTFE分散在一起,然后凝固,熔融挤出可凝结粉末的步骤(2)和使挤出产物经受处理以稳定所述PTFE和FEP中的不稳定末端基团的步骤(3)。
    • 49. 发明授权
    • Fixing device using electromagnetic induction heating and image forming apparatus including same
    • 使用电磁感应加热的固定装置和包括其的成像装置
    • US07796933B2
    • 2010-09-14
    • US12076696
    • 2008-03-21
    • Satoshi UenoKenji IshiiTadashi OgawaAkiko ItoHiroshi Seo
    • Satoshi UenoKenji IshiiTadashi OgawaAkiko ItoHiroshi Seo
    • G03G15/20
    • G03G15/2007G03G15/2053
    • An image forming apparatus includes a fixing device to fix a toner image on a recording medium by applying heat. Such a fixing device includes at least a magnetic flux generator, a heat generating roller, a magnetic shunt layer, and a protective layer. The magnetic flux generator is configured to generate magnetic flux. The heat generating roller including a heat generating layer is configured to generate heat by the magnetic flux. The magnetic shunt layer may be formed independently of the heat generating layer. The protective layer is provided on an inner surface of the magnetic shunt layer and configured to cover a crack formed in the magnetic shunt layer during fabrication of the magnetic shunt layer. An image is fixed onto the recording medium by the heat from the heat generating roller. Alternatively, the magnetic shunt layer may be integrally provided with the heat generating layer.
    • 图像形成装置包括通过施加热量将调色剂图像定影在记录介质上的定影装置。 这种定影装置至少包括磁通量发生器,发热辊,磁分流层和保护层。 磁通发生器被配置为产生磁通量。 包括发热层的发热辊被配置为通过磁通产生热量。 磁分路层可以独立于发热层形成。 保护层设置在磁分路层的内表面上,并且构造成在制造磁分路器层期间覆盖形成在磁分路层中的裂纹。 通过来自发热辊的热将图像固定在记录介质上。 或者,磁分路层可以与发热层一体地设置。