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Patent Searching and Data


Title:
DEVELOPER CARRYING BODY
Document Type and Number:
Japanese Patent JPH07175316
Kind Code:
A
Abstract:

PURPOSE: To obtain an inexpensive developer carrying body which does not cause fixing of a developer due to bleeding of a softening agent by controlling the polymer and the softening agent for the body in such a manner that the difference of SP values between the polymer and the softening agent is smaller than the difference of SP values between the softening agent and the resin which constitutes a developer.

CONSTITUTION: A surface layer 1b comprising a rubber elastic material is formed on a core material 1a such as iron and aluminum, and then the surface is polished to obtain a developer roller l as a cylindrical developer carrying body. The surface layer 1b of the developer roller 1a consists of butadiene as the base polymer and a paraffin-base processed oil as a softening agent. These materials are controlled in such a manner that the difference of SP values between these is smaller than the difference of SP values of polystyrene of the toner resin and the paraffin-base processed oil. Thereby, since the compatibility between the processed oil and the butadiene is higher than the compatibility between the processed oil and the polystyrene, the process oil as a softening agent does not bleed out from the rubber of the surface layer J9 even in a toner atmosphere and the roller maintains a stable state.


Inventors:
OTA ATSUSHI
YOSHII TAKAYUKI
Application Number:
JP34358593A
Publication Date:
July 14, 1995
Filing Date:
December 16, 1993
Export Citation:
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Assignee:
RICOH KK
International Classes:
G03G15/08; F16C13/00; (IPC1-7): G03G15/08; F16C13/00
Attorney, Agent or Firm:
Kuroda Toshi