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    • 2. 发明授权
    • Transfer member cleaning method and image forming apparatus
    • 转印件清洗方法和成像设备
    • US06941085B2
    • 2005-09-06
    • US10454983
    • 2003-06-04
    • Nobuhiko NakanoMitsuhiro HasegawaShigeyuki Wakada
    • Nobuhiko NakanoMitsuhiro HasegawaShigeyuki Wakada
    • G03G21/14G03G15/16
    • G03G15/16G03G15/168G03G2215/1652
    • A surface of a photosensitive body is charged and exposed to light to form an electrostatic latent image that is developed with toner having the same polarity as the surface. The toner image is transferred to a transfer material. During non-image forming periods a first step of applying a first voltage having the same polarity as that of the surface of the photosensitive body and an absolute value larger than the electric image forming potential of the transfer member is performed for a first period of time. In addition, a second step of applying a second voltage having an absolute value smaller than the absolute value of the electric potential of the surface of the photosensitive body to the transfer member for a second period of time not shorter than the first period of time is performed alternately with the first step.
    • 感光体的表面被充电并暴露于光以形成用与表面具有相同极性的调色剂显影的静电潜像。 调色剂图像转印到转印材料上。 在非图像形成期间,施加具有与感光体表面相同极性的第一电压和大于转印部件的电图像形成电位的绝对值的第一步骤进行第一时间段 。 此外,将第二电压的第二步骤施加到绝对值小于感光体表面的电位绝对值的第二电压至第一时间段的第二时间段到转印部件, 与第一步交替执行。
    • 4. 发明申请
    • Water-soluble film
    • 水溶性薄膜
    • US20090291282A1
    • 2009-11-26
    • US11922072
    • 2005-06-16
    • Shuichi KitamuraTomoyoshi MizutaniMitsuhiro Hasegawa
    • Shuichi KitamuraTomoyoshi MizutaniMitsuhiro Hasegawa
    • B32B27/30
    • C08J5/18C08J2329/04C08K3/30C08K5/0016C08K5/053C08L29/04
    • The present invention relates to a water-soluble film, which is a polyvinyl alcohol film comprising a polyvinyl alcohol resin (A), wherein the water-soluble film has a time for dissolution in water at 20° C. of not more than 60 seconds in terms of a film thickness of 76 μm, a b-value of the film is not more than 0.5, and a b-value of the film after leaving at 80° C. for 72 hr is not more than 1.0, preferably a water-soluble film comprising: a polyvinyl alcohol resin (A); at least two kinds of plasticizers (B); and a sulfite salt (C), wherein the content of the plasticizer (B) based on 100 parts by weight of the polyvinyl alcohol resin (A) is 5 to 50 parts by weight and the content ratio of the sulfite salt (C) to the plasticizer (B) (C/B: weight ratio) is more than 0.02 and not more than 0.35. According to the invention, there is provided a water-soluble film comprising a PVA resin as a main component, wherein the film is less likely to cause coloration at the time of film formation and coloration with time even upon contact with a chemical.
    • 本发明涉及一种水溶性膜,其是包含聚乙烯醇树脂(A)的聚乙烯醇膜,其中水溶性膜具有在20℃下在水中溶解不超过60秒的时间 膜厚为76μm时,膜的b值不大于0.5,在80℃下放置72小时后的膜的b值不大于1.0,优选为水 - 可溶性膜,其包含:聚乙烯醇树脂(A); 至少两种增塑剂(B); 和亚硫酸盐(C),其中,基于100重量份的聚乙烯醇树脂(A),增塑剂(B)的含量为5〜50重量份,亚硫酸盐(C)〜 增塑剂(B)(C / B:重量比)大于0.02且不大于0.35。 根据本发明,提供了以PVA树脂为主要成分的水溶性薄膜,即使在与化学品接触的情况下,膜也不易于成膜时着色,随时间着色。