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DRUM SURFACE CONTACT FRICTION ENHANCEMENT TO EXTEND ANTI-CURL BACK COATING BELT/DRUM FUNCTIONAL LIFE

IP.com Disclosure Number: IPCOM000027528D
Original Publication Date: 1997-Aug-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 4 page(s) / 187K

Publishing Venue

Xerox Disclosure Journal

Abstract

It has been proposed that the film-type photoreceptor be mounted on a drum surface to make a drum-type photoreceptor easily. However, the surface contact friction between the backing layer, called as Anti-Curl Back Coating (ACBC), of the belt-type photoreceptor and the drum surface has impacted on the mechanical life of the belt-drum photoreceptor.

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XEROX DISCLOSURE JOURNAL

DRUM SURFACE CONTACT FRICTION ENHANCEMENT TO EXTEND ANTI-CURL BACK COATING BELTDRUM FUNCTIONAL LIFE
Robert C.U. Yu

Proposed Classification
U. S. C1.3991116 Int. C1. G03g 15/02

It has been proposed that the film-type photoreceptor be mounted on a drum surface to make a drum-type photoreceptor easily. However, the surface contact friction between the backing layer, called as Anti-Curl Back Coating (ACBC), of the belt-type photoreceptor and the drum surface has impacted on the mechanical life of the belt-drum photoreceptor.

To obtain good mechanical friction without any slipping, which wiu cause the mechanical fatigue of the photoreceptor, between the ACBC and the drum surface, typically two fabricating methods have already been proposed. In one method, the pneumatically expanded belt-type photoreceptor is mounted on to the drum surface, subsequently the belt-type photoreceptor is mounted securely onto the surface by self-dimensional retraction itself. In another method, a belt-type photoreceptor having a larger diameter is
primarily mounted onto the drum surface, then the photoreceptor is contracted thermally by applying the heat energy. These methods provide relatively long product life of the photoreceptor without any slipping problem therebetween.

This invention provides a longer belt service life without any slippage problem. To achieve this object, a thin layer of polymeric coating is formed between the back-side of the belt- type photoreceptor and the drum surface. The important thing to obtain a better result is the polymeric coating should provide not only high surface contact friction against the back-side of the belt, but also strong adhesion to the drum surface.

The selection of materials for the polymeric coating depends on the material of the belt surface and the drum surface, however, the following materials are preferably used for the purpose of the present invention. These are natural rubber, neoprene, synthetic rubber, Cis- 1, 4-polybutadiene7 polyacrylates, polyester resins such as 49000, 49003, 49021 and 49038 which are available from Morton InternationalTM, vital copolyesters such as PE-

VPE-5987A which are available from Goodyear ChemicalsTM, thermoplastic polyurethane such as 1 180A, 1174, C804 and C98A which are available from BASFTM, two-component

100, PE-200, PE-200D, PE-222, PE-307, VPE-5545A, vPE-557 1 A, VPE-5583A and

XEROX DISCLOSURE JOURNAL - Vol. 22, NO. 4 July/AuguSt 1997 183

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DRUM SURFACE CONTACT FRICTION ENHANCEMENT TO EXTEND ANTI-CURL BACK COATING BELT/DRUM FUNCTIONAL LIFE (CONT'D)

crosslinked polyurethane elastomers such as Bayflex and Baytec products which are available from Mobay CorporationTM and single component polyurethane elastomers such as Q-Thane KR-478 l-A, KR-4800A7 QR-47877, QR-4460, QR-45 10, QR-4239, QR- 4773 and QR-4552 which are available from K.J. Quinn Company, IncTM. Various polycarbonate...