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GLOSS CONTROL BY CHANGING TONER PROCESSING CONDITIONS

IP.com Disclosure Number: IPCOM000027394D
Original Publication Date: 1996-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 58K

Publishing Venue

Xerox Disclosure Journal

Abstract

Crosslinked polymers can have gel and non-gel components which can be changed by shearing in a melt processor such as an extruder. The structure of the gel or the crosslinked portion after the toner is made appears to have a significant effect on gloss. As an example, reactive extruded polyesters processed at different temperatures or in different extruders gave different gloss. Lower process temperatures resulted in higher viscosity and lower gloss in the toner image, whereas, higher process temperatures gave rise to lower viscosity and higher gloss in the toner image. Gloss can therefore be controlled by toner processing in a shear mixing device.

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XEROX DISCLOSURE JOURNAL

GLOSS CONTROL BY CHANGING TONER PROCESSING CONDITIONS U. S. C1.430/109 Suresh K. Ahuja
Che Chung Chow
Thomas R. Hoffend

Proposed Classification

Int. C1. G03g 09/08

Crosslinked polymers can have gel and non-gel components which can be changed by shearing in a melt processor such as an extruder. The structure of the gel or the crosslinked portion after the toner is made appears to have a significant effect on gloss. As an example, reactive extruded polyesters processed at different temperatures or in different extruders gave different gloss. Lower process temperatures resulted in higher viscosity and lower gloss in the toner image, whereas, higher process temperatures gave rise to lower viscosity and higher gloss in the toner image. Gloss can therefore be controlled by toner processing in a shear mixing device.

In addition to extrusion temperatures, the type of extruder also appears to make a different in both viscosity and image gloss. When, for example, a Model ZSK-28 extruder is used instead of a Model ZSK-40, the toner viscosity is lower and gloss is higher because ZSK-28 extrusion brings lower shearing than ZSK-40 resulting in larger size gel particles.

Two approaches of changing gloss temperatures are possible: 1) by changing extruder conditions such as the temperature in the extruder; or 2) by changing from one extruder to another as exemplified above by changing from ZSK-40 to ZSK-28.

DP.5462

XEROX DISCLOSURE JOURNAL - Vol. 21, NO....