Process of making indentation recovery polyvinyl chloride surface covering by reacting the cellulosic felt backing with a cross-linking agent and product produced thereby

Abstract

Abstract THIS INVENTION RELATES TO A PROCESS FOR PRODUCING A SURFACE COVERING HAVING HIGH INDENTATION RESISTANCE AND RECOERY FROM INDENTATION AND HAVING IN COMBINATION A RESILIENT THERMOPLASTIC POLYVINYL CHLORIDE COMPOSITION WEAR-RESISTANT SURFACE LAYER HAVING A THICKNESS OF AT LEAST 0.003 INCH AND A FIBROUS BACKING HAVING A GAUGE-TO-WEIGHT RATIO OF 0.8 TO 1.2 AND A THICKNESS OF FROM 0.025 TO 0.060 INCH WHICH PROCESS COMPRISES IMPREGNATING A PROTEINFREE CELLULOSIC FIBROUS SHEET WITH A UNIFORMLY DISPERSED RESINOUS WATER-RESISTANT AND STRENGTHENING IMPREGNANT, INCORPORATING WITHIN THE CELLULOSIC FIBERS OF THE FIBROUS SHEET A DIFUNCTIONAL, NON-RESINOUS, WATER-SOLUBLE REAGENT CAPABLE OF CROSS-LINKING AT LEAST SOME OF THE HYDROXY GROUPS OF THE CELLULOSIC FIBERS, AND AN ACID CATALYST, HEATING THE FIBROUS SHEET TO CROSS-LINK AT LEAST SOME OF THE HYDROXY GROUPS, AND APPLYING A WEAR-RESISTANT SURFACE LAYER TO THE FIBROUS SHEET THEREBY CROSSLINKING AT LEAST AS MANY OF THE FREE HYDROXYL GROUPS AS NECESSARY TO PROVIDE AT LEAST ABOUT A 50% RECOVERY WITHIN THE 5 MINUTE PERIOD FROM AN INDENTATION PRODUCED BY APPLYING A 100 POUND LOAD THROUGH A 0.75 INCH SPHEREICAL PIN FOR 5 MINUTES TO THE SURFACE COVERING. ALSO, THE DISCLOSURE RELATES TO THE PRODUCT PRODUCED IN THIS MANNER.

Inventors

• 👤 L Palmer

Bibliographic Details