公开(公告)号：US20080206664A1

公开(公告)日：2008-08-28

申请号：US12034884

申请日：2008-02-21

Applicant: Issei Shinmura ,  Kanao KAYAMOTO

Inventor： Issei Shinmura ,  Kanao KAYAMOTO

IPC: G03G9/087

CPC classification number: G03G9/107 ,  G03G9/1075

Abstract: The present invention provides a method for producing a core material of an electrophotographic ferrite carrier, by charging a raw powder with an average particle size of 20 to 50 μm obtained by preparing raw materials for ferrite into a combustion flame along with a carrier gas for the raw powder, thermal-spraying the powder in atmospheric air to ferritize the powder, subsequently rapidly solidifying the thermal-sprayed particle, and sampling and collecting the particle, wherein the method satisfies the conditions comprising the following (1) to (3): (1) a mixture gas of propane and oxygen is used for the combustion flame for the thermal spraying, and a volumetric ratio of the propane to the oxygen is 1:3.5 to 6.0; (2) the carrier gas for the raw powder is air, nitrogen, oxygen or a mixture gas thereof, and the ratio (a/b) of a charged amount (a) of a raw powder (kg/hr) to a charged amount (b) of the carrier gas (kg/hr)for the raw powder is 4.8 or less; and (3) a flame flow velocity of the combustion flame is 65 to 125 m/sec.

Abstract translation: 本发明提供了一种制备电照相铁氧体载体的芯材的方法，该方法是将通过将用于铁素体的原料制备成燃烧火焰的平均粒度为20-50微米的原料粉末与用于 原料粉末，将粉末在大气中热喷涂以使粉末铁化，随后快速固化热喷涂颗粒，并对颗粒进行采样和收集，其中该方法满足包括以下（1）至（3）的条件：（ 1）丙烷和氧气的混合气体用于热喷涂的燃烧火焰，丙烷与氧气的体积比为1:3.5至6.0; （2）原料粉末的载气为空气，氮气，氧气或其混合气体，原料粉末的填充量（a）与填充量（kg / hr）的比例（a / b） （b）的原料粉末的载气（kg / hr）为4.8以下; 和（3）燃烧火焰的火焰流速为65〜125m / sec。

公开(公告)号：US20080241729A1

公开(公告)日：2008-10-02

申请号：US12035673

申请日：2008-02-22

Applicant: Kanao KAYAMOTO ,  Issei SHINMURA

Inventor： Kanao KAYAMOTO ,  Issei SHINMURA

IPC: G03G9/083

CPC classification number: G03G9/10 ,  C01G49/0018 ,  C01G49/0072 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/42 ,  C09C1/22 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113

Abstract: Employed are a resin-coated ferrite carrier for an electrophotographic developer including a ferrite carrier core material having a BET specific surface area of 900 to 5,000 cm2/g and an apparent density of 2.30 to 2.80 g/cm3, and the electrophotographic developer using this resin-coated ferrite carrier.

Abstract translation: 使用的是用于电子照相显影剂的树脂涂覆的铁氧体载体，其包括BET比表面积为900至5000cm 2 / g并且表观密度为2.30至2.80g / cm 3的铁氧体载体芯材料 3和使用该树脂涂覆的铁氧体载体的电子照相显影剂。

公开(公告)号：US20120076551A1

公开(公告)日：2012-03-29

申请号：US13313430

申请日：2011-12-07

Applicant: Kanao KAYAMOTO ,  Hironori HOJO ,  Toshio HONJO

Inventor： Kanao KAYAMOTO ,  Hironori HOJO ,  Toshio HONJO

IPC: G03G15/08

CPC classification number: G03G9/107 ,  G03G9/113

Abstract: An object of the present invention is to provide a resin-coated ferrite carrier comprising a carrier core material having a small particle size, a high sphericity and surface uniformity, and a low standard deviation, a process for producing the carrier, and an electrophotographic developer comprising the resin-coated ferrite carrier and having a high image quality and excellent durability. For achieving the above object, there is provided a resin-coated carrier for an electrophotographic developer characterized by comprising spherical ferrite particles having an average particle size of 20 to 50 μm, a surface uniformity of 90% or more, an average sphericity of 1 to 1.3 and a sphericity standard deviation of 0.15 or less, a process for producing the carrier, and an electrophotographic developer comprising the resin-coated carrier.

Abstract translation: 本发明的目的是提供一种树脂涂覆的铁氧体载体，其包含具有小粒径，高球形度和表面均匀性以及低标准偏差的载体芯材料，制备载体的方法和电子照相显影剂 包括树脂涂覆的铁氧体载体，并且具有高图像质量和优异的耐久性。 为了实现上述目的，提供了一种用于电子照相显影剂的树脂涂覆载体，其特征在于包括平均粒径为20至50μm的球形铁氧体颗粒，90％以上的表面均匀性，平均球形度为1至 1.3，球形度标准偏差为0.15以下，制造载体的方法和包含树脂被覆载体的电子照相显影剂。