Browse Prior Art Database

FUSING MEMBER FOR ELECTRO-STATOGRAPHIC COPIERS

IP.com Disclosure Number: IPCOM000025486D
Original Publication Date: 1985-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 58K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is well known that toner images on copy sheets may be fused to the copy substrate with the use of a roll fuser member which is internally heated and covered with a thermally conductive and resiliently compressable elastomeric material by passing the sheet containing the unfused toner image between a nip formed between the fuser roll and a backup or pressure member. An improved fuser member which provides a good balance between high thermal conductivity, high thermo-mechanical strength and good release properties comprises the cross linked product of a composition comprising 100 parts by weight of alpha omega-hydroxypolydimethylsiloxane, from about 190 to 250 parts by weight of alumina, comprising from about 60 to 80 percent tabular alumina and from about 10 to 40 percent by weight of calcined alumina. The presence of controlled amounts of the calcined alumina provides improved thermal conductivity and thermo-mechanical properties to the fuser member since it is a reinforcing filler and still permits enough release latitude, fusing latitutde and useful life. Preferably, the alpha omega-hydroxypolydimethysiloxane has a number average molecular weight between about 5,000 and 20,000; the tabular alumina has a particle size less than about 100 mesh and the calcined alumina has a particle size less than about 1 micrometer.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 85% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

FUSING MEMBER FOR ELECTRO- STATOGRAPHIC COPIERS Arnold W. Henry
Jack C. Azar
John Saga1

Proposed Classification
U.S. CI. 29/132 Int. CI. B21b 31/08

It is well known that toner images on copy sheets may be fused to the copy substrate with the use of a roll fuser member which is internally heated and covered with a thermally conductive and resiliently compressable elastomeric material by passing the sheet containing the unfused toner image between a nip formed between the fuser roll and a backup or pressure member. An improved fuser member which provides a good balance between high thermal conductivity, high thermo-mechanical strength and good release properties comprises the cross linked product of a composition comprising 100 parts by weight of alpha omega- hydroxypolydimethylsiloxane, from about 190 to 250 parts by weight of alumina, comprising from about 60 to 80 percent tabular alumina and from about 10 to 40 percent by weight of calcined alumina. The presence of controlled amounts of the calcined alumina provides improved thermal conductivity and thermo- mechanical properties to the fuser member since it is a reinforcing filler and still permits enough release latitude, fusing latitutde and useful life. Preferably, the alpha omega-hydroxypolydimethysiloxane has a number average molecular weight between about 5,000 and 20,000; the tabular alumina has a particle size less than about 100 mesh and the calcined alumina has a particle size...