发明授权
- 专利标题: Manufacturing method for toner used in electrophotography
- 专利标题(中): 电子照相术中使用的调色剂的制造方法
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申请号: US821054申请日: 1997-03-20
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公开(公告)号: US5843614A公开(公告)日: 1998-12-01
- 发明人: Kinji Shinzo , Hideki Watanabe , Seiichi Uno , Munekazu Hayashi
- 申请人: Kinji Shinzo , Hideki Watanabe , Seiichi Uno , Munekazu Hayashi
- 申请人地址: JPX Tokyo
- 专利权人: Dainippon Ink and Chemicals, Inc.
- 当前专利权人: Dainippon Ink and Chemicals, Inc.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX8-064930 19960321; JPX9-062903 19970317
- 主分类号: G03G9/087
- IPC分类号: G03G9/087 ; G03G9/08 ; G03G9/09
摘要:
A novel manufacturing method for toner used in electrophotography employing no organic solvent is disclosed. The method comprises the steps of: (1) combing a colored melted resin (a) and an aqueous medium (b), wherein the colored melted resin (a) is prepared by heating and melting a kneaded material containing a synthetic resin for use in an electrophotographic toner having an ionic group and a coloring pigment, and the aqueous medium (b) contains a substance capable of neutralizing the ionic group, and possesses a raised temperature not lower than the softening point of the synthetic resin by way of heating with application of pressure where necessary; (2) dispersing the colored melted resin (a) in the aqueous medium (b) by mechanical means while maintaining a mixture of the colored melted resin (a) and the aqueous medium (b) at a temperature not lower than the softening point of the synthetic resin; (3) producing an aqueous suspension of colored resin microparticles by means of sudden cooling; (4) separating the colored resin microparticles from the suspension; and (5) drying the separated colored resin microparticles.
公开/授权文献
- US4639663A Fly-back transformer with reduced ringing 公开/授权日:1987-01-27
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