Patent ID: 6371606
Filing Date: 2002-04-16
Classification: B41J

Abstract:
An ink retainer comprising:a flexible polyurethane foam prepared by (a) reacting a polyether polyol with a polyisocyanate component, wherein the polyisocyanate component is provided in an amount from about 20 to 50 parts by weight based on 100 parts polyol, and wherein the polyisocyanate component is selected from the group consisting of: 2,4-toluene diisocyanate, 2,6 toluene diisocyanate, and mixtures thereof, and wherein the 2,4 isomer of toluene diisocyanate comprises no more than seventy-five percent by weight of the polyisocyanate component, and (b) reticulating the polyurethane foam to remove foam cell membranes; and wherein said reticulated polyurethane foam absorbs and retains ink.