Browse Prior Art Database

PHOTORECEPTOR LIFE EXTENSION BY ELIMINATING THE LOW MOLECULAR WEIGHT FRACTION FROM MAKROLON

IP.com Disclosure Number: IPCOM000027406D
Original Publication Date: 1996-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

One of the major mechanical shortfalls associated with the organic belted photoreceptors (P/R) is the dynamic fatigue small molecule transport layer cracking over small diameter belt module rollers (e-g. 19 mm roller) after extended P/R belt cycling. Under a machine function condition, the small molecule transport layer, being situated at the top of the P/R belt, is repeatedly subjected to the maximum bending stress each time it flexes over a belt module roller. Consequently, this fatigue bending stress leads to premature small molecule transport layer cracking and shortens its service life.

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 89% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

PHOTORECEPTOR LIFE EXTENSION BY ELIMINATING THE LOW MOLECULAR WEIGHT FRACTION FROM MAKROLONTM Robert C. U. Yu

Proposed Classification
U. S. C1. 355/211 Int. Cl. G03g 05/00

One of the major mechanical shortfalls associated with the organic belted photoreceptors (P/R) is the dynamic fatigue small molecule transport layer cracking over small diameter belt module rollers (e-g. 19 mm roller) after extended P/R belt cycling. Under a machine function condition, the small molecule transport layer, being situated at the top of the P/R belt, is repeatedly subjected to the maximum bending stress each time it flexes over a belt module roller. Consequently, this fatigue bending stress leads to premature small molecule transport layer cracking and shortens its service life.

MAKROLONTM was first dissolved in methylene chloride, followed by addition of methanol to the solution. The resulting P/R not only contains no short chain oligomers, it also has a lower molecular polydispersity than that of the virgin MAKROLONTM 5705 control.

Mechanical robustness was improved through removal of the low molecular weight polycarbonate chains from the commercially available MAKROLONTM 5705. Solvent/ non-solvent precipitated high molecular weight polycarbonate, when used for P/R fabrication, enhances cracking resistance by about two fold. No negative electrical impacts on the fabricated P/R were observed.

DP5481

XEROX DISCLOSURE JOURNAL - Vol. 21, No. 5 September/Octob...