Browse Prior Art Database

MODIFICATION OF TONER FIX AND GLOSS

IP.com Disclosure Number: IPCOM000026996D
Original Publication Date: 1994-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 96K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed are toner compositions containing certain polyethylene additives which provide enhanced gloss and fix properties. By adding waxy polymers such as low molecular weight polyethylenes to high Tg toner resins like PLIOLITE@, to plasticize the resins, fusing characteristics and enhanced gloss are achieved. The addition of waxes to toners, such as polyethylene with a molecular weight of from about 1,000 to about 6,000, are known. Polyethylene with a molecular weight of 500 is shown herein to be critical to obtaining enhanced gloss.

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XEROX DISCLOSURE JOURNAL

MODIFICATION OF TONER FIX AND GLOSS U.S. C1.430/039 John S. Berkes
Robert J. Gruber

Proposed Classification

Int. C1. G03g 09/02

Disclosed are toner compositions containing certain polyethylene additives which provide enhanced gloss and fix properties. By adding waxy polymers such as low molecular weight polyethylenes to high Tg toner resins like PLIOLITE@, to plasticize the resins, fusing characteristics and enhanced gloss are achieved. The addition of waxes to toners, such as polyethylene with a molecular weight of from about 1,000 to about 6,000, are known. Polyethylene with a molecular weight of 500 is shown herein to be critical to obtaining enhanced gloss.

EXAMPLE

The addition of low molecular weight polyethylene and/or polypropylene to toner results in substantial toner fusing changes. Relative to a base toner, (79% PLIOLITE* resin, 28% magnetic pigment, 1% DDAMS charge additive), the addition of 4% POLYWAX 500 (P500) decreases the temperature required to achieve a crease area of 20 by as much as 11°C. A POLYWAX 1000 (P1000) does not alter the fusing behavior relative to the base toner, but a POLYWAX 2000 (P2000) increases the temperature required for equivalent crease by about 6°C. The crease test for toner fix is a combined measure of toner brittleness, tonedtoner cohesion and tonerjpaper adhesion. Consequently, an explanation for the observed fusing modification by the above waxes is that the P500 plasticizes the toner, which is supported by an observed decrease in the T, by 7°C. Th...