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11. 发明专利

HK1211709A1 FERRITE PARTICLES HAVING OUTER SHELL STRUCTURE, FERRITE CARRIER CORE FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER 未知
公开(公告)号：HK1211709A1
公开(公告)日：2016-05-27
申请号：HK15112256
申请日：2015-12-11
申请人： POWDERTECH CO LTD
发明人： AGA KOJI
IPC分类号： G03G20060101 , C01G20060101
摘要： It is an object of the present invention to provide a ferrite particle having a low apparent density, and being capable of maintaining various properties thereof in controllable states and filling a fixed volume in a small weight thereof, a ferrite carrier core material and a ferrite carrier for an electrophotographic developer using the ferrite particle, and the like. In order to achieve the object, there are employed the ferrite particle having a porous structure in the interior thereof and an outer shell structure on the outer periphery thereof, the ferrite carrier core material and the ferrite carrier for an electrophotographic developer using the ferrite particle, and an electrophotographic developer using the ferrite carrier.

12. 发明专利

HK1202339A1 CORE MATERIAL FOR RESIN-FILLED FERRITE CARRIER AND FERRITE CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE FERRITE CARRIER 未知
公开(公告)号：HK1202339A1
公开(公告)日：2015-09-25
申请号：HK15102847
申请日：2015-03-20
申请人： POWDERTECH CO LTD
发明人： SAWAMOTO HIROKI , SUGIURA TAKAO
IPC分类号： G03G20060101
摘要： Disclosed are a resin-filled ferrite carrier core material for an electrophotographic developer, including a porous ferrite particle having an average compression strength of 100 mN or more and a coefficient of variation of the compression strength of 50% or less, a ferrite carrier obtained by filling a resin in the voids of the ferrite carrier core material, and an electrophotographic developer using the ferrite carrier.

13. 发明专利

DE602004014656D1 未知
公开(公告)号：DE602004014656D1
公开(公告)日：2008-08-14
申请号：DE602004014656
申请日：2004-02-06
申请人： POWDERTECH CO LTD
发明人： SHINMURA ISSEI , KOBAYASHI HIROMICHI , ITAGOSHI TSUYOSHI , SATO YUJI
IPC分类号： G03G9/113 , G03G9/10 , G03G9/107 , G03G15/06
摘要： Disclosed is a carrier core material for an electrophotographic developing agent, which comprises 100 parts by weight of a ferrite component represented by a formula (A) and 0.1 to 5.0 parts by weight of ZrO 2 that is present in the ferrite component without forming a solid solution, and which has a magnetization, at 1000(10 3 /4À·A/m), of 65 to 85 Am 2 /kg and an electrical resistance, at an applied voltage of 1000 V, of 10 5 to 10 9 ©. €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (MnO) x (MgO) y (Fe 2 O 3 ) 2 €ƒ€ƒ€ƒ€ƒ€ƒ(A) wherein x, y and z are each expressed in % by mol and are numbers satisfying the conditions of 40‰¤x‰¤60, 0.1‰¤y‰¤10 and x+y+z=100. Also disclosed is a two-component developing agent comprising a coated carrier, which is obtained by coating the above carrier core material with a resin, and toner particles. Further disclosed is an image forming method comprising developing an electrostatic latent image formed by the use of an alternating electric field, with the two-component developing agent. The carrier core material and the coated carrier have high magnetization and high resistance. According to the two-component developing agent of the invention, an excellent image can be formed.

14. 发明专利

DE60020623D1 未知
公开(公告)号：DE60020623D1
公开(公告)日：2005-07-14
申请号：DE60020623
申请日：2000-02-04
申请人： POWDERTECH CO LTD
发明人： OGATA MASAHIRO , TAKAGI KAZUNORI , SUGIURA TAKAO , YOSHIKAWA YUJI , YAMAYA MASAAKI
IPC分类号： G03G9/107 , G03G9/113
摘要： A resin-coated carrier for an electrophotographic developer which comprises a carrier core coated with an acryl-modified silicone resin the silicone resin of which has a methyl group and other organic groups, the molar ratio of the methyl group to the total organic groups inclusive of the methyl group Ämethyl group/(methyl group + other organic groups)Ü being 64 mol% or higher and lower than 70 mol%, and the acrylic resin to silicone resin weight ratio ranging from 2/8 to 4/6.

15. 发明专利

AU2003266697A8 Carrier for electrophotography 未知
公开(公告)号：AU2003266697A8
公开(公告)日：2004-04-23
申请号：AU2003266697
申请日：2003-09-30
申请人： MATSUSHITA ELECTRIC IND CO LTD , POWDERTECH CO LTD
发明人： YUASA YASUHITO , UMEDA KIMINORI , UEMURA TETSUYA , ITAGOSHI TSUYOSHI
IPC分类号： G03G9/113 , G03G9/08

16. 发明专利

DE10103723A1 Two-component developing agent for image forming device, comprises carrier with magnetic particles of predefined average particle diameter and has predefined aggregation degree 未知
公开(公告)号：DE10103723A1
公开(公告)日：2002-02-14
申请号：DE10103723
申请日：2001-01-26
申请人： FUJITSU LTD , POWDERTECH CO LTD
发明人： NAKAMURA YASUSHIGE , ISHIMARU SEIJIRO , KATAGIRI YOSHIMICHI , SATO YUJI , ITAGOSHI TSUYOSHI , KOBAYASHI HIROMICHI
IPC分类号： C08L83/08 , G03G9/08 , G03G9/083 , G03G9/087 , G03G9/10 , G03G9/107 , G03G9/113 , G03G9/00
摘要： The two-component developing agent comprises a carrier which contains magnetic particles coated with resin on the surface, and an insulating toner. The magnetic particles have an average particle diameter of 30-90 mu m and the carrier has an aggregation degree of 2-15%. An Independent claim is also included for image forming device which forms images using the two-component developing agent. The magnetic particle of the carrier is coated with a resin containing cross-linked type fluorine modified silicone resin and an electro conductive carbon. 70-95% of the magnetic particle surface is coated to a thickness of 0.3-5 mu m of the resin. The chloroform extractives in the coating layer is 5-20%.

17. 发明专利

DE69509975T2 未知
公开(公告)号：DE69509975T2
公开(公告)日：2000-01-20
申请号：DE69509975
申请日：1995-06-28
申请人： POWDERTECH CO LTD
发明人： HONJO TOSHIO , SATO YUJI , KAYAMOTO KANAO , KOBAYASHI HIROMICHI , OGATA MASAHIRO
IPC分类号： C01G49/00 , G03G9/08 , G03G9/107 , G03G9/113 , H01F1/36
摘要： A ferrite carrier for electrophotographic developers which comprises a Mn-Mg ferrite having the general formula (MnO)x(MgO)y(Fe2O3)z wherein x + y + z = 100 mol% and SrO is substituted for a part of MnO, MgO and/or Fe2O3.

18. 发明专利

DE69509975D1 未知
公开(公告)号：DE69509975D1
公开(公告)日：1999-07-08
申请号：DE69509975
申请日：1995-06-28
申请人： POWDERTECH CO LTD
发明人： HONJO TOSHIO , SATO YUJI , KAYAMOTO KANAO , KOBAYASHI HIROMICHI , OGATA MASAHIRO
IPC分类号： C01G49/00 , G03G9/08 , G03G9/107 , G03G9/113 , H01F1/36
摘要： A ferrite carrier for electrophotographic developers which comprises a Mn-Mg ferrite having the general formula (MnO)x(MgO)y(Fe2O3)z wherein x + y + z = 100 mol% and SrO is substituted for a part of MnO, MgO and/or Fe2O3.

19. 发明专利

DE69417203T2 未知
公开(公告)号：DE69417203T2
公开(公告)日：1999-07-08
申请号：DE69417203
申请日：1994-12-14
申请人： POWDERTECH CO LTD
发明人： SATO YUJI , OGATA MASAHIRO , SHIMIZU KOUICHI , TAKEI NORIO , HONJO TOSHIO
IPC分类号： C01G49/06 , G03G9/08 , G03G9/107 , G03G9/113 , H01F1/36
摘要： This invention provides a ferrite carrier for an electrophotographic developer characterized in that a core material is ferrite particle composed of 17.0 to 29.0 mol% of Li2O and 71.0 to 83.0 mol% of Fe2O3, exhibits a resistance of 2.5 x 10 to 2.5 x 10 OMEGA when a voltage of 250 V is applied, satisfies the relationship: a1 - a2 OMEGA and the resistance (R2) thereof exhibited when a voltage of 1000 V is applied thereto is taken as a2 x 10 OMEGA (with the proviso that 1.0 to 1.0 x 10 OMEGA when a voltage of 250 V is applied thereto, and has a true specific gravity of 4.70 or below.

20. 发明专利

DE68924311T2 未知
公开(公告)号：DE68924311T2
公开(公告)日：1996-05-15
申请号：DE68924311
申请日：1989-07-12
申请人： KAO CORP , POWDERTECH CO LTD
发明人： HONJO TOSHIO , SATO YUJI , FUKUSHIMA YOSHIHIRO , NAWA MASAYOSHI , YASUDA SHINICHIRO
IPC分类号： G03G9/087 , G03G9/097 , G03G9/107 , G03G9/113
摘要： A developer for electrostatic photography comprises toner and carrier coated with a composition comprising a silicone resing having (II) and (II min ) and another silicone resin having (III), (IV) or (V). v

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