Soft tissue having temporary wet strength

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 21/20 (2006.01) D21F 11/14 (2006.01) D21H 17/65 (2006.01) D21H 23/08 (2006.01) D21H 25/00 (2006.01) D21H 27/02 (2006.01) D21H 27/38 (2006.01)

Patent

CA 2331178

Disclosed is a soft, low density paper product made using papermaking fibers and a cationic temporary wet strength resin. Such paper products have a density less than about 0.6 grams per cubic centimeter, a basis weight is between about 10 and about 65 grams per square meter, a dry strength less than about 500 grams per inch (197 grams per centimeter), a ratio of an initial wet strength to the dry strength greater than about 0.15:1, and a ratio of a thirty minute wet strength to the initial wet strength less than about 0.4. Methods for producing, such paper products are also disclosed. The paper products may be produced either as homogeneous structures or as multi-layered structures and may be either creped or uncreped.

Cette invention concerne un produit en papier doux et de faible densité qui est fabriqué à partir de fibres de papier et d'une résine cationique ayant une résistance temporaire à l'humidité. Ces produits en papier possèdent une densité inférieure à environ 0,6 grammes par centimètre cube, un poids de base de 10 à 65 grammes environ par mètre carré, une résistance à sec inférieure à environ 500 grammes par pouce (197 grammes par centimètre), un rapport entre la résistance initiale à l'humidité et la résistance à sec supérieur à environ 0,15:1, et un rapport entre la résistance à l'humidité après trente minutes et la résistance initiale à l'humidité inférieur à environ 0,4. Cette invention concerne également des procédés de fabrication de ces produits en papier. Ces produits en papier peuvent consister en des structures homogènes ou multicouches, et être crêpés ou non.

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