Soft,absorbent,fibrous,sheet material formed by avoiding mechanical compression of the elastomer containing fiber furnished until the sheet is at least 80%dry

Abstract

Abstract A FIBROUS WEB OR SHEET MATERIAL, FORMED BY DEPOSITION FROM AN AQUEOUS SLURRY AND CHARACTERIZED BY UNSUALLY HIGH BULK AND SOFTNESS, ACHIEVED AT LEAST IN PART BY THE ADDITION OF AN ELASTOMERIC BONDING MATERIAL TO THE AQUEOUS SLURRY AND BY THE AVOIDANCE OF MECHANICAL COMPRESSION OF THE WEB UNTIL IT IS AT LEAST 80% DRY, SO THAT THE ELASTOMERIC BONDING MATERIAL CREATES MANY OF THE INTERFIBER BONDS WITHIN THE SHEET MATERIAL. IN SOME INSTANCES THE WEB IS SUBJECTED TO DIFFERENTIAL CREPING TECHNIQUES BY ADHERING IT IN A PRINTED PATTERN TO THE CREPING SURFACE. IN SOME EMBODIMENTS, ADDITIONAL ELASTOMERIC BONDING MATERIAL IS ADDED IN THE PRINTED PATTERN. THE UNSUALLY HIGH BULK OF THE WEB IS DEMONSTRATED BY VERY LOW AVERAGE CALCULATED DENSITY THROUGH ITS THICKNESS UNDER NO LOAD OF LESS THAN 0.3000 GRAMS PER CUBIC CENTIMETER. ANOTHER SIGNIFCANT FEATURE INDICATIVE OF THE BULK AND SOFTNESS OF THE WEB IS DEMONSTRATED BY ITS RELATIVELY HIGH TEA-TO-STIFFNESS RATIO OF GREATER THAN 1.50 X 10==4 A METHOD FOR FORMING SUCH WEBS OR SHEET MATERIAL IS ALSO DISCLOSED. IN WHICH LIGNOCELLULOSIC FIBERS ARE MIXED WITH WATER AND WITH AN ELASTOMERIC BONDING MATERIAL INTO A FIBER FURNISH, WHICH FURNISH IS FORMED INTO A WEB. WATER IS REMOVED FROM THE WEB WITHOUT MECHANICAL COMPRESSION OF THE WEB AND, WHEN THE WEB IS AT LEAST 80% DRY, IT IS ADHERED TO A CREPING SURFACE AND CREPED THEREFROM.

Inventors

• 👤 J Salvucci
• 👤 P Yiannos

Bibliographic Details