Electrophotographic photoreceptor, process cartridge, and image forming apparatus

By using a high-durability bonding resin on the surface layer of the electrophotographic photoreceptor, combining a high elastic deformation rate polyester resin PA and a polycarbonate resin PB, the abnormal discharge problem when the DC voltage is charged is solved, and the wear resistance of the photoreceptor is improved, ensuring the improvement of image quality.

CN119717420APending Publication Date: 2025-03-28FUJIFILM BUSINESS INNOVATION CORP
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Patent Information

Application Number
CN202410229794.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-27
Filing Date
2024-02-29
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing electrophotographic photoreceptors are prone to abnormal discharge when the DC voltage is charged, which affects the image quality and lacks wear resistance.

Method used

The top layer of the bonding resin with high durability is used. Specifically, the bonding resin includes a polyester resin PA with an elastic deformation rate XA of 53.0% or more and a polycarbonate resin PB with an elastic deformation rate XB of less than 5% and more than 12%. This combination is used to improve the wear resistance of the photoreceptor and suppress abnormal discharge.

Benefits of technology

It is realized that abnormal discharge is suppressed when the DC voltage is charged, and the wear resistance of the photoreceptor is improved, ensuring the improvement of image quality.

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Abstract

An electrophotographic photoreceptor, a process cartridge, and an image forming apparatus, the electrophotographic photoreceptor having an outermost layer containing a charge transport material and a binder resin, the binder resin contains a polyester resin PA having an elastic deformation rate XA of 53.0% or more, and a polycarbonate resin PB having an elastic deformation rate XB lower than the elastic deformation rate XA of the polyester resin PA and within the range of 5-12%.
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