Title:
CHARGING ROLL FOR ELECTROPHOTOGRAPHIC EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2022/202425
Kind Code:
A1
Abstract:
Provided is a charging roll for electrophotographic equipment, the charging roll suppressing toner contamination, tearing/fracturing of an elastic body layer, and detachment of a surface layer, and exhibiting excellent charging properties. A charging roll 10 comprises a shaft body 12, an elastic body layer 14 formed on an outer circumferential surface of the shaft body 12, and a surface layer 16 formed on an outer circumferential surface of the elastic body layer 14. The elastic body layer 14 includes silicone rubber. A plurality of large protruding parts 18a having a width of 13-48 µm and a height of 5-13 µm are provided on the outer circumferential surface of the elastic body layer 14, and a plurality of small protruding parts 18b forming protrusions/recesses having a ten-point average roughness Rz of 1.0-6.0 µm are provided on the surface of the large protruding parts 18a. The surface layer 16 contains a urethane polymer, and the elongation at breakage of the surface layer 16 is 285-525%.
Inventors:
SAITO YOSHIHIRO (JP)
MIYAGAWA SHIMPEI (JP)
MIYAGAWA SHIMPEI (JP)
Application Number:
PCT/JP2022/011153
Publication Date:
September 29, 2022
Filing Date:
March 13, 2022
Export Citation:
Assignee:
SUMITOMO RIKO CO LTD (JP)
International Classes:
G03G15/02
Foreign References:
| JP2015045788A | 2015-03-12 | |||
| JP2000075595A | 2000-03-14 | |||
| JP2019105663A | 2019-06-27 | |||
| JP2009162885A | 2009-07-23 | |||
| JP2014066857A | 2014-04-17 |
Attorney, Agent or Firm:
YAMADA, Kazuhiro (JP)
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