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公开(公告)号：US4902597A
公开(公告)日：1990-02-20
申请号：US216055
申请日：1988-07-07
申请人： Masayuki Takeda , Masao Mochizuki , Koichi Kumashiro , Ikutaroh Nagatsuka , Masayoshi Shinoki , Takayoshi Aoki
发明人： Masayuki Takeda , Masao Mochizuki , Koichi Kumashiro , Ikutaroh Nagatsuka , Masayoshi Shinoki , Takayoshi Aoki
CPC分类号： G03G9/107 , G03G9/0872
摘要： A negative charging carrier for an electrophotographic developer is described, comprising a binder resin having dispersed therein a magnetic powder, wherein said carrier contains a fluorine-containing resin fine powder in an amount of from 5 to 50% by weight based on the total weight of the carrier. The carrier provides a developer for magnetic brush development having a prolonged life and a high rate of development.
摘要翻译： 描述了一种用于电子照相显影剂的负电荷载体，其包含分散有磁性粉末的粘合剂树脂，其中所述载体含有基于总重量的5-50重量％的含氟树脂细粉末 承运人 载体提供了一种具有延长寿命和高发展速度的磁刷开发的开发者。
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公开(公告)号：US5059504A
公开(公告)日：1991-10-22
申请号：US488139
申请日：1990-03-05
申请人： Masayoshi Shinoki , Masahiro Takagi , Ikutaroh Nagatsuka , Koichi Kumashiro , Takayoshi Aoki , Masayuki Takeda
发明人： Masayoshi Shinoki , Masahiro Takagi , Ikutaroh Nagatsuka , Koichi Kumashiro , Takayoshi Aoki , Masayuki Takeda
IPC分类号： G03G9/113
CPC分类号： G03G9/1134 , Y10T428/2998
摘要： A carrier for a developer comprising a core material coated with a coating material consisting essentially of a copolymer of vinylidene fluoride and trifluoroethylene or hexafluoropropylene is disclosed. The carrier causes neither fog generation in the initial stage of running nor contamination of a developing machine because of its high rate of charge increase and satisfactory resistance to surface contamination, and exhibits excellent adhesion between the core material and the coating material.
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公开(公告)号：US4929528A
公开(公告)日：1990-05-29
申请号：US267882
申请日：1988-11-07
申请人： Masayoshi Shinoki , Masahiro Takagi , Ikutaroh Nagatsuka , Koichi Kumashiro , Takayoshi Aoki , Masayuki Takeda
发明人： Masayoshi Shinoki , Masahiro Takagi , Ikutaroh Nagatsuka , Koichi Kumashiro , Takayoshi Aoki , Masayuki Takeda
IPC分类号： G03G9/113
CPC分类号： G03G9/1134 , Y10T428/2998
摘要： A carrier for a developer comprising a core material coated with a coating material consisting essentially of a copolymer of vinylidene fluoride and trifluoroethylene or hexafluoropropylene is disclosed. The carrier causes neither fog generation in the initial stage of running nor contamination of a developing machine because of its high rate of charge increase and satisfactory resistance to surface contamination, and exhibits excellent adhesion between the core material and the coating material.
摘要翻译： 公开了一种用于显影剂的载体，其包括涂覆有基本上由偏二氟乙烯和三氟乙烯或六氟丙烯的共聚物的涂层材料的芯材料。 载体在运行的初始阶段既不引起雾化，也不会因显影机的高电荷增加和表面污染的良好性而导致显影机的污染，并且在芯材和涂层材料之间表现出优异的粘附性。
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公开(公告)号：US4973538A
公开(公告)日：1990-11-27
申请号：US308223
申请日：1989-02-09
IPC分类号： G03G9/087
CPC分类号： G03G9/08728
摘要： A toner for development of a latent electrostatic image containing a colorant and a binder resin formed of a mixture of a low-molecular weight component and a high-molecular weight component. Both the low-molecular weight component and high-molecular weight component are made from a styrene-acrylic copolymer where the weight ratio (A) of styrene to acrylic monomer in the low-molecular weight polymer component and an the weight ratio (B) of styrene to acrylic monomer in the high-molecular weight polymer component satisfies the relationship A/B.ltoreq.1.3. The mixing ratio of the low-molecular weight and high-molecular weight components is within the range of from 80:20 to 40:60. The weight-average molecular weight (Mw) and the number-average molecular weight (Mn) of the low-molecular weight polymer component satisfies the relationship Mw/Mn.ltoreq.3.0.
摘要翻译： 用于显影含有着色剂和由低分子量组分和高分子量组分的混合物形成的粘合剂树脂的静电潜像的调色剂。 低分子量组分和高分子量组分均由苯乙烯 - 丙烯酸共聚物制成，其中苯乙烯与丙烯酸单体在低分子量聚合物组分中的重量比（A）和重量比（B） 高分子量聚合物组分中的苯乙烯与丙烯酸单体满足关系A /B≤3.3。 低分子量和高分子量组分的混合比在80:20至40:60的范围内。 低分子量聚合物组分的重均分子量（Mw）和数均分子量（Mn）满足Mw /Mn≤3.0的关系。
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