Sumitomo Electric Industries, Limited

Sumitomo Electric Fine Polymer, Inc.

Naoki Onmori

Jun Sugawara

Shingo Nakajima

Akira Mizoguchi

Yoshimasa Suzuki

Yasuhiro Fukumoto

Kazuhiro Kizawa

Yusuke Uchiba

Provided are a silicone rubber sponge that forms an elastic layer of a pressure roller of an image-forming apparatus, and that has a high mechanical strength so as to be used in a high-speed image-forming apparatus or a color image-forming apparatus, and a rubber-covered roller including the silicone rubber sponge. The silicone rubber sponge is produced by mixing expanded resin microballoons with a low-molecular-weight silicone rubber to prepare a compound A, mixing a high-molecular-weight silicone rubber with the compound A to prepare a silicone rubber compound, and heating the silicone rubber compound at a temperature lower than a softening point of the resin microballoons to cure the silicone rubbers.

Silicone rubber sponge and rubber-covered roller

A polyimide tube composed of a polyimide resin composition in which 5 to 23.5 volume percent of boron nitride and 1 to 15 volume percent of an acicular substance are dispersed as a filler in a polyimide resin on the basis of the total volume of the composition, a method of producing the tube, a method of producing a polyimide varnish used for producing the tube, and a fixing belt including the tube as a base member are provided.

Polyimide tube, method for production thereof, method for production of polyimide varnish, and fixing belt

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Osaka, Japan

Naoki Onmori