Konishiroku Photo Industry Co., Ltd.

Sekisui Chemical Co., Ltd.

Hirozo Funaki

Makoto Tomono

Noriyoshi Tarumi

Minoru Takahashi

Yutaka Yamada

Hiroshi Ogawara

Yasuyuki Fujisaki

Minoru Kohara

Takahira Kasuya

Goichi Yamakawa

Ryubun Seimiya

Hideaki Morita

Ryubun Seimaya

The present invention relates to toners for electrophotography wherein the main resin component comprises a lower molecular weight polymer and a higher molecular weight polymer each of which is different from the other wherein the higher molecular weight polymer has a glass transition point of at least 50.degree. C. and the lower molecular weight polymer has a glass transition point no higher than 65.degree. C. The above polymers comprise one or more polymers selected from styrene polymers, arcylic polymers, and styrene-acrylic copolymers. Generally, the lower molecular weight polymer has a weight average molecular weight of 50,000 or less and the higher molecular weight polymer has a weight average molecular weight of 80,000 or more.

Toner for electrophotography

The present application relates to a novel toner for developing electrostatic latent images. The toner contains a colorant and a resin wherein the resin contains at least one particular type of polymer which has a Mw/Mn ratio of from 3.5 to 40 wherein the Mn value is about between 2,000 and 30,000.

Toner for developing electrostatic latent images comprising a resin

The present invention relates to a method of fixing a toner image onto a paper bearing said image with the use of a particular toner containing a colorant and a resin wherein the resin contains at least one particular type of polymer which has a Mw/Mn ratio of about 3.5 to 40 wherein the Mn value is between about 2,000 and 30,000.

Toner for developing electrostatic latent images

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Osaka, Japan

Hirozo Funaki