Electrostatic image developing toner and two-component developer

A technology for electrostatic image development and toner, which is applied in the directions of developers, electrographics, instruments, etc., can solve the problem of insufficient wax dispersion, retention, anti-offset separation resistance, high temperature storage and filming resistance improvement Insufficient and other problems, to achieve the effect of excellent storage and improved dispersion
CN102197342AInactive Publication Date: 2011-09-21RICOH KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RICOH KK
Publication Date
2011-09-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides an electrostatic image developing toner capable of improving the dispersibility of wax in the toner and superior in offset resistance and in storageability (heat-resistant storageability) at high temperatures, and a two-component developer which uses this electrostatic image developing toner. The electrostatic image developing toner includes: a binder resin, a colorant, and a release agent, wherein the binder resin contains a polyester resin, and a block copolymer which has a polyolefin backbone unit.
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Description

technical field

[0001] The present invention relates to an electrostatic image developing toner and a two-component developer. Background technique

[0002] In electrophotographic image forming apparatuses, a contact type thermal fixing method such as a heat roller fixing method is widely used. Such as figure 1 As shown, a fixing device 10 for the heat roller fixing method includes a heat roller 11 and a pressure roller 12; The unfixed image is fused and fixed on the recording paper 21 at the portion (nip portion) that is in contact with each other under pressure.

[0003] The problem with the contact type thermal fixing method typified by the thermal roller fixing method is that since the unfixed toner image on the recording paper 21 is brought into contact with the surface of the heating member such as the heating roller 11, the unfixed toner image to be fixed on the recording paper 21, so that part of the unfixed toner adheres to the heating roller 11, and when the hea...

Claims

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