Bando Chemical Industries, Inc.

Sadaharu Nakamura

Takayuki Nagase

Takashi Miki

Harushi Nagami

Hiroshi Sanda

The present invention provides a cleaning blade for an electrophotographic device, which, even when spherical (perfectly spherical or irregularly shaped), polymerized toner with a small particle diameter is used, can achieve sufficient abrasion resistance and sufficient cleaning ability (particularly cleaning ability under low-temperature and low-humidity conditions). The cleaning blade for an electrophotographic device includes an elastic rubber member; and a supporting member. The elastic rubber member has a double layer structure including an edge layer and a base layer. The edge layer is made of a material with a JIS-A hardness of 65&#xb0; to 72&#xb0; at 23&#xb0; C. and a rebound resilience of 10 to 35%. The base layer is made of a material with a JIS-A hardness of 70&#xb0; to 80&#xb0; at 23&#xb0; C. and a rebound resilience of 40 to 70%, the JIS-A hardness value being larger than the value of hardness of the edge layer.

Cleaning blade for electrophotographic device and method for manufacturing the same

An object of the present invention is to provide a liquid developing electrographic device roller suppressed in volumetric variation caused by a carrier. As a means for solving the problems, the present invention provides a liquid developing electrophotographic device roller including a shaft and an elastic material layer provided around the outer peripheral side of the shaft, wherein the elastic material layer is formed by using a polyurethane obtained by reacting a polyester polyol with a difunctional isocyanate.

Growing community of inventors

Hyogo, Japan

Sadaharu Nakamura