Title:
CHARGING ROLL FOR ELECTROPHOTOGRAPHIC DEVICE AND METHOD FOR MANUFACTURING CHARGING ROLL FOR ELECTROPHOTOGRAPHIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/276649
Kind Code:
A1
Abstract:
Provided are a charging roll for an electrophotographic device with which attenuation of charge from the roll surface due to local uneven resistance is minimized and satisfactory images are obtained, and a method for manufacturing said charging roll for an electrophotographic device. The charging roll 10 for an electrophotographic device comprises a shaft 12, an elastic layer 14 formed on the outer peripheral surface of the shaft 12, and a top layer 16 formed on the outer peripheral surface of the elastic layer 14. The elastic layer 14 is constituted of a high-resistance first phase 14a in which the surface resistance value is 1.6×1014Ω·cm to 8.8×1015Ω·cm (inclusive), and a low-resistance second phase 14b in which the surface resistance value is 1.3×102Ω·cm to 4.9×103Ω·cm (inclusive). The second phase 14b contains two types of carbon black: carbon black A, of which the amount of DBP absorption is 115 cm3/100 g to 160 cm3/100 g (inclusive); and carbon black B, of which the amount of DBP absorption is 70 cm3/100 g to 110 cm3/100 g (inclusive).
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Inventors:
SAITO YOSHIHIRO (JP)
MIYAGAWA SHIMPEI (JP)
MIYAGAWA SHIMPEI (JP)
Application Number:
PCT/JP2022/023760
Publication Date:
January 05, 2023
Filing Date:
June 14, 2022
Export Citation:
Assignee:
SUMITOMO RIKO CO LTD (JP)
International Classes:
G03G15/02; C08K3/04; C08L7/00; C08L9/00; C08L9/02; C08L71/03; F16C13/00
Foreign References:
| JP2020166208A | 2020-10-08 | |||
| JP2020166259A | 2020-10-08 |
Attorney, Agent or Firm:
YAMADA, Kazuhiro (JP)
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