公开(公告)号：US20140295342A1

公开(公告)日：2014-10-02

申请号：US14227564

申请日：2014-03-27

Applicant: POWDERTECH CO., LTD.

Inventor： Makoto ISHIKAWA ,  Tetsuya UEMURA ,  Masashi AOKI

IPC: G03G9/113

CPC classification number: G03G9/1132 ,  G03G9/1075 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1136

Abstract: Provided is a resin-coated carrier for an electrophotographic developer, wherein the surface of a magnetic particle is coated with a mixed resin composed of two resins, and when the two resins are denoted by the resin 1 and the resin 2, respectively, the relative difference between the respective adsorbed moisture amounts of the resin 1 and the resin 2 at a temperature of 30° C. and a relative humidity of 80% satisfies the following formula (1): 1≦|ax−b(100−x)|≦10  (1) a: the adsorbed moisture content (% by weight) of the resin 1 b: the adsorbed moisture content (% by weight) of the resin 2 x: the content percentage of the resin 1 (0

Abstract translation: 提供一种用于电子照相显影剂的树脂涂覆载体，其中磁性颗粒的表面涂覆有由两种树脂组成的混合树脂，并且当两种树脂分别由树脂1和树脂2表示时，相对 在30℃，相对湿度80％的树脂1和树脂2的各吸附水分量之间的差别满足下式（1）：1＆nlE; | ax-b（100-x）| ＆lt; nlE; 10（1）a：树脂1b的吸附水分含量（重量％）b：树脂吸附的水分含量（重量％）2 x：树脂1的含量百分比（0

公开(公告)号：US20130183614A1

公开(公告)日：2013-07-18

申请号：US13738324

申请日：2013-01-10

Applicant: Powdertech Co., Ltd.

Inventor： Koji AGA ,  Makoto ISHIKAWA ,  Masashi AOKI

IPC: G03G9/107

CPC classification number: G03G9/1075 ,  G03G9/107

Abstract: A porous ferrite core material for an electrophotographic developer wherein the apparent density thereof is 1.5 to 1.9 g/cm3, the shape factor SF-2 thereof is 101 to 110 and the magnetization as measured with a VSM at 1K·1000/4π·A/m is 40 to 60 Am2/kg, a resin-coated ferrite carrier for an electrophotographic developer obtained by coating the surface of the porous ferrite core material with a resin, and an electrophotographic developer using the ferrite carrier.

Abstract translation: 一种用于电子照相显影剂的多孔铁氧体芯材料，其表观密度为1.5至1.9g / cm 3，其形状因子SF-2为101至110，并且以1K·1000 / 4pi·A / m为40〜60Am 2 / kg，通过用树脂涂布多孔铁素体芯材的表面而得到的电子照相显影剂用树脂被覆铁氧体载体和使用该铁氧体载体的电子照相显影剂。