发明授权
- 专利标题: Toner for developing electrostatic image
- 专利标题(中): 用于显影静电图像的调色剂
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申请号: US365735申请日: 1994-12-29
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公开(公告)号: US5578408A公开(公告)日: 1996-11-26
- 发明人: Takaaki Kohtaki , Masaaki Taya , Makoto Unno , Tadashi Doujo
- 申请人: Takaaki Kohtaki , Masaaki Taya , Makoto Unno , Tadashi Doujo
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX5-354163 19931229
- 主分类号: G03G9/08
- IPC分类号: G03G9/08 ; G03G9/087 ; G03G9/097 ; G03G9/083
摘要:
A toner for developing an electrostatic image is constituted by a binder resin and a colorant. The toner is characterized by a percentage change .sub.G' of at most 50% as calculated by the following formula (1):.gamma..sub.G' =(1-G'.sub.50% /G'.sub.1%).times.100 (1),wherein .gamma..sub.G' denotes a percentage change of storage modulus, G'.sub.50% denotes a storage modulus at 50% strain at 150.degree. C., and G'.sub.1% denotes a storage modulus at 1% strain at 150.degree. C.; a percentage change .gamma..sub.G" of at most 50% as calculated by the following formula (2):.gamma..sub.G" =(1-G".sub.50% /G".sub.1%).times.100 (2),wherein .gamma..sub.G" denotes a percentage change of loss modulus, G".sub.50% denotes a loss modulus at 50% strain, and G".sub.1% denotes a loss modulus at 1% strain; and a storage modulus G' of 3.times.10.sup.3 -7.times.10.sup.4 dyn/cm.sup.2 in a range of 1-50% strain at 150.degree. C. The toner is characterized by applicability to a wide variety of image forming apparatus, especially those having remarkably different fixing speeds.