Canon Kabushiki Kaisha

Shigeo Kuroda

Yasuhiro Miyahara

Yuji Kitano

Matsutaka Maeda

Makoto Souma

Yutaro Yoshida

Koji Sato

Akeshi Asaka

Hiroto Sugimoto

Akira Okano

Kaoru Okamoto

Atsushi Hori

Jun Ohira

Toshiyuki Yoshida

Kazuhisa Shirayama

Naoto Kameyama

Takanori Ueno

Ryosuke Tsuruga

Megumi Uchino

Hiroshi Tominaga

Midai Suzuki

Kiyonori Soutome

An electrophotographic member having an endless shape comprises: a substrate; and an elastic layer on an outer peripheral surface thereof. The elastic layer contains a silicone rubber and metal silicon fillers dispersed in the silicone rubber. An average of area ratios of the metal silicon fillers in respective first binarized images is 42% or less, and an average of area ratios of the metal silicon fillers in respective second binarized images is 42% or less. The elastic layer has λ of 1.30 W/(m·K) or more, where λ is a thermal conductivity of the elastic layer in a thickness direction thereof, and the elastic layer has ρV of 9.0 LOG Ω·cm or more, where ρV is a common logarithm value of a volume resistivity thereof.

Electrophotographic member and heat fixing device

A fixing member includes a substrate having an endless shape; and an elastic layer on an outer peripheral surface of the substrate, the elastic layer containing a silicone rubber and fillers dispersed in the silicone rubber, a content of the fillers with respect to the elastic layer being 35 vol % or more and 50 vol % or less. The fillers includes at least a first filler and a second filler. The first filler is at least one selected from the group consisting of: magnesium oxide; and zinc oxide. The second filler is at least one selected from the group consisting of metal silicon and silicon carbide. A proportion of a sum of the first filler and the second filler to a total amount of the fillers in the elastic layer is 90 vol % or more. Further, the average of 6 sets of representative coefficient A is 1.4 or more.

Fixing member and heat fixing device

A fixing member for electrophotography having an endless shape has a base layer having an endless shape, and an elastic layer on the outer circumferential surface of the base layer. The elastic layer includes a silicone rubber and a filler dispersed in the silicone rubber. The total amount of the filler compounded in the elastic layer is 30 vol % or less based on the total volume of the elastic layer. The elastic layer satisfies the relation of &#x3bb;td&#x3e;&#x3bb;md&#x3e;&#x3bb;nd. &#x3bb;td is a thermal conductivity of the elastic layer in the circumferential direction, &#x3bb;nd is a thermal conductivity of the elastic layer in the thickness direction, and &#x3bb;md, is a thermal conductivity of the elastic layer in the longitudinal direction. &#x3bb;td is 2.0 W/(m&#xb7;K) or more, and &#x3bb;nd is 1.3 W/(m&#xb7;K) or more.

Fixing member and heat fixing apparatus

An intermediary transfer belt having surface resistivity &#x3c1;s of 1&#xd7;10&#x3a9;/square or more and volume resistivity &#x3c1;v of 1&#xd7;10&#x3a9;&#xb7;cm or less includes a thermoplastic resin material containing carbon black. The carbon black contained in the thermoplastic resin material has a weight ratio of 22.5-28.5 weight % and include first carbon black and second carbon black. The first carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 50-90 weight % and dibutyl phthalate absorption of 93-127 ml/100 g, and the second carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 10-50 weight % and dibutyl phthalate absorption of 36-79 ml/100 g.

Intermediary transfer belt, manufacturing method of the intermediary transfer belt, and image forming apparatus

Growing community of inventors

Nagoya, Japan

Shigeo Kuroda