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SURFACE MODIFICATION OF POROUS INK MEDIUMS BY POLYMER COATINGS FOR RECEIVING, STORING, AND DELIVERING INKS IN AN INK JET PRINTER

IP.com Disclosure Number: IPCOM000027278D
Original Publication Date: 1996-Feb-29
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 71K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is proposed that a porous medium or substrate used in receiving, storing, feeding, and delivering ink be modified by a coating having a polymeric material. The coating may be hydrophilic and chemically stable to the exposure of various ink compositions. These compositions include: colorants, surfactants, humectants, vechicles (e.g. water), and chemical additives. For water based ink, the polymer coated medium must be hydrophilic and compatible with different inks.

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XEROX DISCLOSURE JOURNAL

SURFACE MODIFICATION Proposed Classification OF POROUS INK MEDIUMS
BY POLYMER COATINGS
FOR RECEIVING, STORING, AND
DELIVERING INKS
IN AN INK JET
PRINTER
John Wei-Ping Lin

U.S. C1.346/140.1 Int. C1. Gold 15/02

It is proposed that a porous medium or substrate used in receiving, storing, feeding, and delivering ink be modified by a coating having a polymeric material. The coating may be hydrophilic and chemically stable to the exposure of various ink compositions. These compositions include: colorants, surfactants, humectants, vechicles (e.g. water), and chemical additives. For water based ink, the polymer coated medium must be hydrophilic and compatible with different inks.

The hydrophilic surface of the coated porous medium or substrate binds loose fibers (synthetic and natural), foams, porous plastics, and composite materials together to produce a stronger material. The coated medium or substrate will not break or shred so as to give off undesired particles that can block the passage way of a print head channel. Hence, the polymer serves both as an adhesive and a modifying agent to change the surface properties.

For a system using nonaqueous ink, a hydrophobic polymer is required to modify an ink delivery medium. Since most ink jet inks, including thermal ink jet inks are water based inks, the proposal gives emphasis to coatings that are suitable for delivering those inks. However, the proposal is also applicable to the delivery of nonaqu...