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US 6,673,407 B2Granted
Semiconductive member, semiconductive belt, semiconductive roll, and image formation apparatus
AssigneesFuji Xerox Co., Ltd., The Yokohama Rubber Co., Ltd.
InventorsYukio Hara, Shoichi Morita, Masuo Kuroda, Jiro Watanabe
Life of this patent
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Abstract
A semiconductive member such as a semiconductive belt or a semiconductive roll used with an image formation apparatus has a portion formed of a thermoplastic elastomer composition comprising a thermoplastic resin 73 as a matrix and rubber particles 72 at least some of which have conductivity and at least some of which are cross-linked as domain.
Claims31
A semiconductive member having a portion formed of a thermoplastic elastomer composition comprising:
- a thermoplastic resin as a matrix, and
- rubber particles at least some of which have conductivity and at least some of which are cross-linked as domain.
A semiconductive belt having a base material and a surface layer, wherein
- the base material is formed of a thermoplastic elastomer composition comprising an insulating thermoplastic resin as a matrix, and rubber particles at least some of which have conductivity and at least some of which are cross-linked as domain,
- said semiconductive belt having a Young's modulus of 500 MPa or more and volume resistivity of 107 to 1013 Ω cm.
A semiconductive belt having a thermoplastic elastomer member formed of a thermoplastic elastomer composition having a thermoplastic resin as a matrix and rubber particles at least some of which are cross-linked as domain, and comprising the rubber particles at least some of which have conductivity with the volume specific resistance value of the rubber particle being smaller than that of the thermoplastic resin,
- Young's modulus being 500 MPa or more, the volume specific resistance value being 106 to 1013 Ω cm, and variations in volume specific resistance value (R) being within to the power of one.
A semiconductive roll comprising:
- a core,
- a foam surrounding the core, and
- an elastic layer formed of a thermoplastic elastomer composition comprising an insulating thermoplastic resin as a matrix and rubber particles at least some of which have conductivity and at least some of which are cross-linked as domain, surrounding the foam, and having ASKER C hardness of 25 to 70 degrees and volume resistivity of 104 to 1012 Ω cm.
A semiconductive roll comprising:
- a thermoplastic elastomer member formed like a cylinder on an outer periphery of a core with the thermoplastic elastomer member being formed of a thermoplastic elastomer composition having a thermoplastic resin as a matrix and rubber particles at least some of which are cross-linked as domains and comprising the rubber particles at least some of which have conductivity with the volume specific resistance value of the rubber particle being smaller than that of the thermoplastic resin, JIS A hardness being 25 to 50 degrees, the volume specific resistance value being 106 to 1012 Ω cm, and variations in volume specific resistance value (R) being within to the power of one.
An image formation apparatus for charging a predetermined photosensitive body,
- applying exposure light responsive to an image to the photosensitive body,
- forming an electrostatic latent image on the photosensitive body, developing the electrostatic latent image in toner,
- forming a toner image on the photosensitive body, and finally transferring the toner image onto a predetermined record medium and fixing the toner image, and
- forming an image made of the fixed toner image on the record medium, wherein
- said image formation apparatus comprises:
- a semiconductive belt having a base material being formed of a thermoplastic elastomer composition comprising an insulating thermoplastic resin as a matrix and rubber particles at least some of which have conductivity and at least some of which are cross-linked as domain, and a surface layer formed on a surface of the base material, the semiconductive belt having a Young's modulus of 500 MPa or more and volume resistivity of 107 to 1013 Ω cm.
3 more elements
An image formation apparatus comprising:
- an image support for forming an electrostatic latent image responsive to image information,
- a developing unit for visualizing the electrostatic latent image formed on the image support as a toner image in toner,
- an intermediate transfer body onto which the toner image supported on the image support is transferred, and
- a transfer unit for transferring the toner image transferred onto the intermediate transfer body to a record medium, wherein
- a material forming the intermediate transfer body has a thermoplastic elastomer member formed of a thermoplastic elastomer composition having a thermoplastic resin as a matrix and rubber particles at least some of which are cross-linked as domain and comprising the rubber particles at least some of which have conductivity with the volume specific resistance value of the rubber particle being smaller than that of the thermoplastic resin, Young's modulus being 500 MPa or more, the volume specific resistance value being 106 to 1013 Ω cm, and variations in volume specific resistance value (R) being within to the power of one.
2 more elements
An image formation apparatus comprising:
- an image support for forming an electrostatic latent image responsive to image information,
- a developing unit for visualizing the electrostatic latent image formed on the image support as a toner image in toner,
- a transfer material transport unit having a conductive belt for transporting a transfer material to the image support to transfer the toner image supported on the image support to the transfer material, and
- a transfer unit for transferring the toner image on the image support to the transfer material, wherein
- the conductive belt has a thermoplastic elastomer member formed of a thermoplastic elastomer composition having a thermoplastic resin as a matrix and rubber particles at least some of which are cross-linked as domain and comprising the rubber particles at least some of which have conductivity with the volume specific resistance value of the rubber particle being smaller than that of the thermoplastic resin, Young's modulus being 500 MPa or more, the volume specific resistance value being 106 to 1013 Ω cm, and variations in volume specific resistance value (R) being within to the power of one.
2 more elements
An image formation apparatus for charging a predetermined photosensitive body,
- applying exposure light responsive to an image to the photosensitive body,
- forming an electrostatic latent image on the photosensitive body, developing the electrostatic latent image in toner,
- forming a toner image on the photosensitive body,
- finally transferring the toner image onto a predetermined record medium and fixing the toner image, and
- forming an image made of the fixed toner image on the record medium, wherein
- said image formation apparatus comprises:
- a semiconductive roll comprising a core,
- a foam surrounding the core, and
- an elastic layer formed of a thermoplastic elastomer composition comprising an insulating thermoplastic resin as a matrix and rubber particles at least some of which have conductivity and at least some of which are cross-linked as domain, surrounding the foam, and having ASKER C hardness of 25 to 70 degrees and volume resistivity of 104 to 1012 Ω cm.
6 more elements
An image formation apparatus for charging a predetermined photosensitive body,
- applying exposure light responsive to an image to the photosensitive body,
- forming an electrostatic latent image on the photosensitive body,
- developing the electrostatic latent image in toner,
- forming a toner image on the photosensitive body,
- finally transferring the toner image onto a predetermined record medium and fixing the toner image, and
- forming an image made of the fixed toner image on the record medium, wherein
- a semiconductive roll comprising a thermoplastic elastomer member formed like a cylinder on an outer periphery of a core with the thermoplastic elastomer member being formed of a thermoplastic elastomer composition having a thermoplastic resin as a matrix and rubber particles at least some of which are cross-linked as domains and comprising the rubber particles at least some of which have conductivity with the volume specific resistance value of the rubber particle being smaller than that of the thermoplastic resin, JIS A hardness being 25 to 50 degrees, the volume specific resistance value being 104 to 1012 Ω cm, and variations in volume specific resistance value (R) being within to the power of one is used.
4 more elements
Dependencies are inferred from the claim text.