Browse Prior Art Database

TONER FORMULATIONS WITH HIGH TRANSFER EFFICIENCY

IP.com Disclosure Number: IPCOM000027119D
Original Publication Date: 1995-Apr-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 59K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed are toner formulations with high transfer efficiency in corotron based transfer subsystems that are used, for example, in Xerox Model 1065 copiers and related copying and printing machines. The formulations have a PLIOTONE@ base resin and an average particle size of from about 9 to about 13 microns and are useful for enhanced or improved transfer efficiencies in both zero gapped and gapped transfer of toner particles in xerographic marking engines.

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XEROX DISCLOSURE JOURNAL

TONER FORMULATIONS WITH Proposed Classification HIGH TRANSFER EFFICIENCY U.S. C1.430/109 Cheryl A. Hanzlik
C1. Int. Charles A. Radulski E04b 01/32

Disclosed are toner formulations with high transfer efficiency in corotron based transfer subsystems that are used, for example, in Xerox Model 1065 copiers and related copying and printing machines. The formulations have a PLIOTONE@ base resin and an average particle size of from about 9 to about 13 microns and are useful for enhanced or improved transfer efficiencies in both zero gapped and gapped transfer of toner particles in xerographic marking engines.

A representative partial formula and ranges of additional formulation additives and resulting representative tribocharge value follows:

Carbon black pigment Regal 330'" 3 to 15 wt. %

Dimethyl distearyl ammonium methyl sulfate (internal charge control additive) 0.5 to 1.5 wt. %

Silane treated fumed silica (external additive)

tribocharge

50-80% toner surface coverage

10 microcoulombd gr-

The toners may be prepared in a conventional manner with, for example, known melt mixing and roll milling techniques, and thereafter used in conventional xerographic imaging processes and result in improved image transfer efficiency and improved longevity of cleaning system hardware.

XEROX DISCLOSURE JOURNAL - Vol. 20, No. 2 March/April 1995 201

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