CHARGING ROLL FOR ELECTROPHOTOGRAPHIC EQUIPMENT

• US 20190235409A1
• Filed: 04/15/2019
• Published: 08/01/2019
• Est. Priority Date: 02/22/2017
• Status: Active Grant

• Current Assignee: Sumitomo Riko Company Limited.
• Original Assignee: Sumitomo Riko Company Limited.
• Inventors: SAITO, Yoshihiro, WATANABE, Yasuhide, KANDA, Shigeki
• Granted Patent: US 10,444,655 B2
• Time in Patent Office: Days
• CPC Class Codes: F16C 13/00 Rolls, drums, discs, or the like guide rollers in feeding webs B65H27/00; calender rolls, bearings therefor D21G1/02; rotary drums or rollers for heat-exchange or heat-transfer apparatus F28F5/02; Bearings or mountings therefor
• CPC Class Codes: G03G 15/0233 Structure, details of the charging member, e.g. chemical composition, surface properties
• CPC Class Codes: G03G 15/0808 characterised by the developer supplying means, e.g. structure of developer supply roller
• CPC Class Codes: H01B 1/20 Conductive material dispersed in non-conductive organic material organic macromolecular compounds or compositions C08

Abstract

The disclosure provides a charging roll for excellent image quality electrophotographic equipment. This charging roll for electrophotographic equipment is provided with a shaft body, an elastic body layer formed on the outer periphery of the shaft body, and a surface layer formed on the outer periphery of the elastic body layer, wherein the surface layer contains a modifier having polyamide and a hydroxyl group, and has a Bénard cell with a height of 0.1 to 1.0 μm on the surface thereof. A fluorine-based modifier having a hydroxyl group, a silicone-based modifier having a hydroxyl group, and an acrylic modifier having a hydroxyl group can be cited as examples of the modifier having the hydroxyl group.

Claims

1. A charging roll for electrophotographic equipment, comprising:

an elastic body layer; and

a surface layer formed on an outer periphery of the elastic body layer,

wherein the surface layer contains polyamide and a modifier having a hydroxyl group,

the modifier having a hydroxyl group is a fluorine-based modifier, and

the surface layer has Bé

nard cells with a height of 0.1 to 1.0 μ

m on a surface thereof,

the surface layer contains roughness-forming particles having an average particle diameter within a range of 3.0 to 30 μ

m, and

a size of the Bé

nard cells is within a range of 250 to 1100 μ

m.