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    • 1. 发明授权
    • Electrically-semiconductive poly(amic acid) liquid compositions and their use
    • 电半导体聚(酰胺酸)液体组合物及其用途
    • US06303054B1
    • 2001-10-16
    • US09638343
    • 2000-08-14
    • Junya KanetakeTsutomu YoshidaNaoki NishiuraTsuneo MiyamotoTakashi Kuraoka
    • Junya KanetakeTsutomu YoshidaNaoki NishiuraTsuneo MiyamotoTakashi Kuraoka
    • H01B124
    • H01B1/24
    • The present invention provides an electrically-semiconductive poly(amic acid) liquid composition and a use thereof. An electrically-semiconductive poly(amic acid) (polyimide precursor) liquid composition whose electrical semiconductivity is applied by comprising an electrically-conductive carbon black. Change in an electrical resistivity of the liquid composition after being stored for 180 days at a temperature of 23° C. and in an atmosphere of a RH of 65% is 7% or less based on the electrical resistivity immediately after the preparation of the liquid composition. The electrically-semiconductive poly(amic acid) liquid composition is obtainable by mixing 5-40 parts by weight of a poly(amic acid), 95-60 parts by weight of an organic polar solvent and 10-40% by weight based on the poly(amic acid) of an electrically-conductive carbon black having a volatile content of 5-20%, a specific surface area of 100-300 m2/g and a pH of 2-4. The electrically-semiconductive poly(amic acid) liquid composition is used for molding an electrically-semiconductive seamless tubular polyimide film, for example, which is usable as an intermediate belt member for fixation and transfer of toner in a copying machine.
    • 本发明提供一种电半导体聚(酰胺酸)液体组合物及其用途。 通过包含导电炭黑施加电半导电性的电半导体聚(酰胺酸)(聚酰亚胺前体)液体组合物。 在液体组合物在23℃的温度下和RH的65%的气氛中储存180天后的电阻率的变化基于在制备液体之后的电阻率为7%以下 组成。 电半导体聚(酰胺酸)液体组合物可通过将5-40重量份的聚(酰胺酸),95-60重量份的有机极性溶剂和10-40重量%的混合物 挥发物含量为5-20%,比表面积为100-300m2 / g,pH为2-4的导电性炭黑的聚(酰胺酸)。 电半导体聚(酰胺酸)液体组合物用于模制例如可用作在复印机中定影和转印调色剂的中间带构件的电半导体无缝管状聚酰亚胺膜。
    • 9. 发明授权
    • Seamless tubular electrically-semiconductive aromatic polymide film and process for producing the same
    • 无缝管状半导电芳香族聚酰亚胺膜及其制造方法
    • US06352750B1
    • 2002-03-05
    • US09638317
    • 2000-08-14
    • Junya Kanetake
    • Junya Kanetake
    • B32B108
    • B29D7/01B29K2079/08B29K2105/0023B29K2995/0005G03G15/162Y10T428/13Y10T428/1352Y10T428/139Y10T428/1397Y10T428/268Y10T428/31721
    • The present invention provides an seamless tubular electrically-semiconductive film excellent in heat resistance, chemical resistance and mechanical property with excellent electrical resistance properties being applied thereto. The seamless tubular electrically-semiconductive film comprises carbon black having a volatile content of 10-25% which consists mainly of volatile acidic ingredients having a pH of not more than 4. Combination of the polyimide having a Tg of 210-350° C. and a surface oxidation-treated carbon black is preferred since the combination enables to easily obtain the film wherein a surface resistivity/volume resistivity ratio is not more than two digits, and variation in the surface resistivity caused by an applied voltage for charging is nor more than half a digit. The film is produced, for example, by centrifugal casting. The film is remarkly advantageous as an intermediate transfer belt in a color copying machine.
    • 本发明提供了耐热性,耐化学性和机械性能优异的无缝管状半导电膜,并且具有优异的电阻性能。 无缝管状半导电膜包括挥发物含量为10-25%的炭黑,其主要由pH不大于4的挥发性酸性成分组成,Tg为210-350℃的聚酰亚胺和 表面氧化处理的炭黑是优选的,因为该组合使得能够容易地获得其中表面电阻率/体积电阻率比不大于两位数的膜,并且由施加的充电电压引起的表面电阻率的变化也不大于 半数位 该膜例如通过离心铸造制造。 作为彩色复印机中的中间转印带,该膜是非常有利的。