Paper and paper-like products including water insoluble...

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 11/20 (2006.01) C08B 11/12 (2006.01) D21C 9/00 (2006.01) D21H 17/29 (2006.01) D21H 17/55 (2006.01) D21H 17/56 (2006.01)

Patent

CA 2236415

The invention relates to paper and similar products made with at least a portion of the papermaking furnish being essentially water insoluble carboxyethyl cellulose fibers. A cationic additive material, such as a polyamide epichlorohydrin wet strength resin or cationic starch, is also required. From 2-100 % of the modified fiber is used in conjunction with a usual papermaking fiber. The D.S. of the carboxyethylated fiber is in the range of about 0.01-0.3, preferably about 0.025-0.10. A notable feature of paper products made with the fiber/cationic additive system is an improved ratio of wet to dry tensile and burst strengths compared with sheets made from unmodified fiber.

L'invention concerne le papier et des produits similaires dans lesquels au moins une partie de la composition de fabrication est constituée essentiellement de fibres cellulosiques de carboxyéthyle insolubles dans l'eau. Un additif cationique, tel qu'une résine de polyamide épichlorohydrine résistant à l'état humide ou un amidon cationique, est également nécessaire. De 2-100 % de la fibre modifiée est utilisé conjointement avec une fibre à papier habituelle. Le degré de substitution carboxyalkyle de la fibre carboxyéthylée se situe dans la plage d'environ 0,01-0,3, de préférence d'environ 0,025-0,10. L'amélioration du rapport des résistances à la traction et à l'éclatement à l'état humide et à l'état sec, comparé avec des feuilles réalisées à partir de fibres non modifiées, constitue une caractéristique notable des produits en papier réalisés avec ce système fibres/additif cationique.

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