High solids fabric crepe process for producing absorbent...

D - Textiles – Paper – 21 – F

Patent

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D21F 11/14 (2006.01)

Patent

CA 2579738

A method of making a fabric-creped absorbent cellulosic sheet is provided which includes dewatering a papermaking furnish and partially drying the web without wet-pressing before applying it to a translating transfer surface moving at a first speed. The process further includes fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a creping fabric, the creping step occurring under pressure in a creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a second speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the surface and redistributed on the creping fabric. After creping, the web is dried, preferably with a plurality of can dryers to a consistency of at least about 90 percent while it is held in the creping fabric.

L'invention concerne un procédé de fabrication d'une couche cellulosique absorbante de tissu crêpé qui consiste à déshydrater une composition de fabrication de papeterie et à sécher partiellement la bande sans pressage humide avant son application sur une surface de transfert de translation qui se déplace à une première vitesse. Le procédé consiste ensuite à crépir de tissu la bande provenant de la surface de transfert à une certaine consistance comprise entre environ 30 et environ 60 %, au moyen d'un tissu de crêpage. L'étape de crêpage s'effectue sous pression dans un point de pinçage de crêpage formé entre la surface transfert et le tissu de crêpage, le tissu étant acheminé à une seconde vitesse inférieure à la vitesse de la surface de transfert. Le modèle de tissu, les paramètres du point de pinçage, la vitesse delta et la consistance à la bande sont sélectionnés de telle manière que la bande est crépie à partir de la surface et redistribuée sur le tissu de crêpage. Après le crêpage, la bande est séchée, de préférence, avec une pluralité de sécheuses à tambour, pour parvenir à une consistance comprise entre environ 90 %, tandis qu'elle est maintenue dans le tissu de crêpage.

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