Method for making high bulk wet-pressed tissue

Details Method for making high bulk wet-pressed tissue Method for making high bulk wet-pressed tissue

D - Textiles, Paper

21

F

D21F 11/00 (2006.01) D21F 3/02 (2006.01) D21F 11/14 (2006.01)

Patent

CA 2250137

Cellulosic webs, such as tissue webs, can be dewatered to consistencies of about 70 percent or greater in a high intensity extended nip press (20) while retaining a substantial amount of bulk. While webs intended for use as tissues containing conventional furnishes become overly densified when passed through a high intensity extended nip press, furnishes containing certain types of fibers, such as chemically cross-linked or heat-treated fibers, resist compression and allow the compressed web to retain a high level of bulk after a high degree of dewatering.

L'invention se rapporte à des bandes de cellulose telles que des bandes de papier mousseline qui peuvent être asséchées jusqu'à une consistance d'environ 70 % ou plus dans une presse à ligne de contact étendue (20) exerçant une forte pression tout en maintenant un volume important de gonflant. Alors que les bandes, prévues pour être utilisées comme papier mousseline renfermant des compositions de fabrication traditionnelles, se densifient excessivement après être passées dans une presse à ligne de contact étendue et à forte pression, les compositions de fabrication, contenant certains types de fibres telles que des fibres traitées thermiquement ou réticulées chimiquement, résistent à la compression et permettent à la bande comprimée de conserver un volume important de gonflant après avoir été extrêmement asséchée.

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