Electrophotographic member and electrophotographic image forming apparatus

Patent metadata

Field	Value
Publication number	US-11372351-B2
Application number	US-202117465376-A
Country	US
Kind code	B2
Filing date	Sep 2, 2021
Priority date	Sep 14, 2020
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

An electrophotographic member has a base layer, an elastic layer, and a surface layer on the elastic layer, in this order in a thickness direction, wherein the surface layer includes a urethane resin, a perfluoropolyether compound including a specific repeating structure, and a polyol compound having a specific structure.

First claim

What is claimed is:

1. An electrophotographic member comprising:
a base layer;
an elastic layer; and
a surface layer on the elastic layer, in this order in a thickness direction, wherein
the surface layer comprises:
(a) a urethane resin;
(b) a perfluoropolyether compound including at least one of repeating structures represented by structural formulae (1) to (4):

wherein in structural formulae (1) to (4), n1 to n4 each represent an integer of 1 or larger; and
(c) a polyol compound represented by structural formula (5)

wherein X1 to X6 each independently represent an H atom or a C1 to C12 alkyl, alkenyl or alkynyl group having a straight-chain, branched or cyclic structure; and 15, m5 and n5 are each independently an integer of 0 or larger, and satisfy 15+n5≥2.

2. The electrophotographic member according to claim 1 , wherein the polyol compound has a boiling point of 180° C. or higher.

3. The electrophotographic member according to claim 1 , wherein the perfluoropolyether compound has a main chain having CF 3 group at a terminal end thereof.

4. The electrophotographic member according to claim 1 , wherein a content of the perfluoropolyether compound is 1% by mass or more and 40% by mass or less based on a total amount of the urethane resin, the perfluoropolyether compound and the polyol compound.

5. The electrophotographic member according to claim 1 , wherein a content of the polyol compound is 0.3% by mass or more and 20% by mass or less based on a total amount of the urethane resin, the perfluoropolyether compound and the polyol compound.

6. The electrophotographic member according to claim 1 , wherein a mass ratio of the perfluoropolyether compound to the polyol compound (the perfluoropolyether compound/the polyol compound) in the surface layer is 1/2 to 32/1.

7. The electrophotographic member according to claim 1 , having an endless belt shape.

8. The electrophotographic member according to claim 1 , wherein the surface layer has a thickness of 1 to 10 μm.

9. An electrophotographic image forming apparatus comprising an electrophotographic member, wherein
the electrophotographic member comprises:
a base layer; an elastic layer; and a surface layer on the elastic layer, in this order in a thickness direction, wherein
the surface layer comprises: (a) a urethane resin;
(b) a perfluoropolyether compound including at least one of repeating structures represented by structural formulae (1) to (4):

wherein in structural formulae (1) to (4), n1 to n4 each represent an integer of 1 or larger; and
(c) a polyol compound represented by structural formula (5)

wherein X1 to X6 each independently represent an H atom or a C1 to C12 alkyl, alkenyl or alkynyl group having a straight-chain, branched or cyclic structure; and 15, m5 and n5 are each independently an integer of 0 or larger, and satisfy 15+n5≥2.

10. The electrophotographic image forming apparatus according to claim 9 , comprising:
an electrophotographic photosensitive member;
an intermediate transfer member onto which an unfixed toner image that has been formed on the electrophotographic photosensitive member is primarily transferred; and
a secondary transfer unit that secondarily transfers, onto a recording medium, the toner image transferred onto the intermediate transfer member, wherein
the intermediate transfer member is the electrophotographic member.

Assignees

• Canon Kk

Inventors

• Miyauchi Yohei
• Tanaka Toshio
• Tsuji Yasutomo

Classifications

• G03G15/162 Primary

  details of the the intermediate support, e.g. chemical composition · CPC title

• G03G15/1685

  Structure, details of the transfer member, e.g. chemical composition · CPC title

• G03G15/1605

  using at least one intermediate support (G03G15/1625 takes precedence) · CPC title