Canon Kabushiki Kaisha

Katsuya Abe

Takeshi Suzuki

Katsuhisa Matsunaka

Yasuhiro Miyahara

Kazuo Kishino

Naoki Akiyama

Hiroto Sugimoto

Masaaki Takahashi

Yuji Kitano

Jun Miura

Matsutaka Maeda

Yuji Hasegawa

Yasuharu Notoya

Mamo Matsumoto

An electrophotographic member including: a base member; an elastic layer having a thickness of from 100 &#x3bc;m to 500 &#x3bc;m, and containing a cured product of an addition-curable silicone rubber composition; and a cured product layer arranged between the base member and the elastic layer, the cured product layer containing a cured product of a composition containing an organopolysiloxane having a Si&#x2014;H group and a silane coupling agent having an alkenyl group. A peel adhesive strength between the elastic layer and the base member is a specific range. The elastic layer undergoes a cohesive failure in a peel test from the base member. The ratio (HU2/HU1) of a universal hardness HU2 on the inner surface of the elastic layer to a universal hardness HU1 at a position reached by cutting the elastic layer from its outer surface in its depth direction by 10 &#x3bc;m is a specific range.

Electrophotographic member and fixing device

Provided is a fixing member for a heat fixing apparatus which can further improve utilization efficiency of heat for heat fixing of an unfixed toner. A fixing member having an endless belt shape includes a substrate and an elastic layer on the substrate, wherein the elastic layer includes silicone rubber and a filler dispersed in the silicone rubber, and when a thermal conductivity of the elastic layer in a thickness direction is defined as &#x3bb;nd, a thermal conductivity of the elastic layer in a circumferential direction is defined as &#x3bb;td, and a thermal conductivity of the elastic layer in a width direction is defined as &#x3bb;md, &#x3bb;nd is 1.30 W/(m&#xb7;K) or more, and &#x3bb;nd, &#x3bb;td, and &#x3bb;md satisfy a relationship as shown below &#x3bb;nd&#x3e;&#x3bb;md&#x3e;&#x3bb;td.

Fixing member and heat fixing apparatus

The present disclosure provides an electrophotographic member having an elastic layer containing graphite particles dispersed in a silicone rubber and having a high thermal conductivity in the thickness direction. The electrophotographic member includes a substrate and an elastic layer on the substrate, the elastic layer containing a cured product of an addition-curable liquid silicone rubber mixture including an addition-curable liquid silicone rubber and graphite particles, and the graphite particles having a DBP oil absorption number of 40 cm/100 g or more and lower than 80 cm/100 g.

Addition-curable liquid silicone rubber mixture, electrophotographic member and production method therefor, and fixing apparatus

Provided is an electrophotographic member, the member including an elastic layer that is formed by graphite particles dispersed in a silicone rubber and has high thermal conductivity in the thickness direction. The electrophotographic member has a substrate and an elastic layer on the substrate, in which the elastic layer contains a cured product of an addition-curable liquid silicone rubber mixture including graphite particles, the dibutyl phthalate (DBP) oil absorption number of the graphite particles is from 80 cm/100 g to 150 cm/100 g, the thermal conductivity in the thickness direction of the elastic layer is from 1.1 W/(m&#xb7;K) to 5.0 W/(m&#xb7;K), and the modulus in tension of the elastic layer is from 0.1 MPa to 4.0 MPa.

Addition-curable liquid silicone rubber mixture, electrophotographic member, method for producing the same, and fixing apparatus

A coating apparatus configured to coat a peripheral surface of an endless member with a coating liquid, includes: a holding member configured to hold the endless member; an impregnation member configured to be impregnated with the coating liquid and configured to coat the endless member with the coating liquid in contact with the endless member; a nozzle member configured to eject the coating liquid onto the endless member; a rotating mechanism configured to rotate the holding member relative to the impregnation member and the nozzle member; and a moving mechanism configured to move the holding member relative to the impregnation member and the nozzle member so that the coating liquid is ejected from the nozzle member onto the endless member in a region where the coating liquid is already coated by the impregnation member.

Coating apparatus, coating method, fixing member manufacturing apparatus, fixing member manufacturing method and fixing member

A fixing member includes a substrate and an elastic layer on the substrate. The elastic layer comprises a cured product of a silicone rubber composition containing an anatase titanium oxide particle and an addition-curable silicone rubber, and undergoes cohesive failure in 90&#xb0; peel test specified in JIS K6854-1: 1999. In the fixing member, an allyl group bound to a silicon atom is present at the interface between the substrate and the elastic layer.

Electrophotographic image forming fixing member, method for manufacturing said fixing member, and electrophotographic image forming apparatus

Provided is a member for electrophotography. The member for electrophotography includes: a substrate; an elastic layer containing a cured silicone rubber having a methyl group bonded to a silicon atom; and a fluorine resin release layer bonded to a surface of the elastic layer by an addition-curing-type silicone rubber adhesive. The elastic layer contains a titanium oxide particle having an anatase-type crystal structure.

Member for electrophotography and heat fixing device

An electrophotographic fixing member includes a substrate, a cured silicone rubber layer and a fluorine resin layer bonded onto the cured silicone rubber layer, wherein a micro hardness of a cured silicone rubber constituting the cured silicone rubber layer is designated as H&#x3bc;0, and a micro hardness of a rubber obtained by soaking the cured silicone rubber in a methyl hydrogen silicone oil for 24 hours and then further curing the cured silicone rubber, is designated as H&#x3bc;1, H&#x3bc;1/H&#x3bc;0 is 1.5 or more and 5.0 or less, and the cured silicone rubber layer comprises a titanium oxide crystal having an anatase type structure.

Electrophotographic fixing member having cured silicone rubber layer with unsaturated aliphatic group and anatase type titanium oxide crystal, fixing apparatus and electrophotographic image forming apparatus

Provided is a fixing member having a silicone rubber elastic layer blended with a carbon nanotube, the fixing member suppressing peeling at an interface in association with insufficient adhesion between a base member and the silicone rubber elastic layer at the time of the use of the fixing member, and hence securing adhesion durability. The fixing member includes a base member, an elastic layer, and a surface layer, in which: the elastic layer contains a silicone rubber and a carbon nanotube; a ratio E200/E50 of an elastic modulus E200 of the elastic layer at 200&#xb0; C. to an elastic modulus E50 of the elastic layer at 50&#xb0; C. is 0.5 or more and less than 1.0; an adhesive strength between the elastic layer and the base member is 3.0 N/cm or more and 20.0 N/cm or less; and the elastic layer undergoes a cohesive failure at the time of a peel test.

Fixing member and method of manufacturing the member, fixing device, and electrophotographic image-forming apparatus

The method for forming a coating film includes: supplying a first liquid from a nozzle to a cylindrical substrate to thereby form the coating film of the first liquid, wherein the method includes, pressing a member including a second liquid, to form a liquid film of the second liquid on the peripheral surface, and forming the coating film of the first liquid includes: supplying the first liquid onto the liquid film of the second liquid formed on the peripheral surface of the substrate to form a bead of the first liquid between the liquid-supplying unit and the liquid film of the second liquid, and extending the bead in a circumferential direction of the substrate.

Method for forming coating film and method for producing fixing member

An elastic layer of the fixing member contains a silicone rubber, an inorganic filler and vapor grown carbon fibers, relationships of 3X+30Y&#x2266;170, 25&#x2266;X&#x2266;50 and 0.5&#x2266;Y&#x2266;3.1 are satisfied when a volume percent of the inorganic filler compounded in the elastic layer is expressed by X (%) and a volume percent of the vapor grown carbon fibers compounded in the elastic layer is expressed by Y (%), and a ratio of a fiber length to a fiber diameter of the vapor grown carbon fibers, aspect ratio, is 50 or more.

Electrophotographic fixing member, fixing apparatus and electrophotographic image forming apparatus

Provided is a member for electrophotography including a fluorine resin surface layer formed by melting fluorine resin powder, the member being capable of stably maintaining rubber elasticity over a long time period. Further, provided are a fixing member, a fixing device, and an electrophotographic image forming apparatus each capable of stably providing the image quality of an electrophotographic image. The member for electrophotography is a member for electrophotography, comprising: a substrate; a cured silicone rubber elastic layer; and a fluorine resin surface layer obtained by melting a fluorine resin powder, wherein: when a microhardness of a cured rubber forming the cured silicone rubber elastic layer is defined as H, and a microhardness of a rubber obtained by soaking the cured rubber in a methyl hydrogen silicone oil for 24 hours, and then further curing the cured rubber is defined as H, H/His 2.5 or more and 5.0 or less.

Member for electrophotography, fixing device, and electrophotographic image forming apparatus

The present invention is directed to providing a fixing member that has a flexible surface and that can supply a larger amount of heat to a material to be recorded and a toner in a shorter period of time. The fixing member comprises a substrate, an elastic layer and a releasing layer, wherein thermal effusivity in a depth region from a surface of the releasing layer is 1.5 [kJ/(m&#xb7;K&#xb7;sec)] or more, the depth region corresponding to a thermal diffusion length when an alternating-current temperature wave having a frequency of 10 Hz is applied to the surface of the releasing layer, and a surface micro rubber hardness is 85 degrees or less.

The present invention relates to a fixing member that can apply sufficient power to press toner particles on a raised portion of a paper surface while also maintaining good conformability to a depressed portion of the paper surface that is an advantage of a surface layer including a soft rubber layer. The fixing member has a surface layer to come into contact with toner, the surface layer has a sea-island structure in which the fluororubber constitutes a sea phase and a silicone compound having a crosslinked structure constitutes an island phase, and in a stress-strain curve of the surface layer, the tangential elastic modulus, the slope of the curve, increases as the strain increases, in the strain range of 0.25 to 0.8.

Growing community of inventors

Tokyo, Japan

Katsuya Abe