A process for making smooth uncreped tissue paper containing...

D - Textiles – Paper – 21 – H

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D21H 25/00 (2006.01) D21F 2/00 (2006.01) D21F 11/14 (2006.01) D21H 17/67 (2006.01) D21H 27/30 (2006.01)

Patent

CA 2266932

A process for producing uncreped, strong, soft and low dusting tissue paper web (71) useful in the manufacture of soft, absorbent sanitary products such as bath tissue, facial tissue, and absorbent towels is disclosed. The tissue papers comprise fibers such as wood pulp and a non-cellulosic, water-insoluble particular filler such as kaolin clay. Said process for incorporating a non-cellulosic particulate filler into a tissue paper comprises the steps of: (a) providing an aqueous suspension of papermaking furnish comprising papermaking fibers and non-cellulosic particulate filler, said particulate filler preferably comprising from about 1 % to about 50 % of the total weight of said tissue paper, said particulate filler selected from the group consisting of clay, calcium carbonate, titanium dioxide, talc, aluminium silicate, calcium silicate, alumina trihydrate, activated carbon, pearl starch, calcium sulfate, glass microspheres, diatomaceous earth, and mixtures thereof, more preferably, said particulate filler is kaolin clay having an average equivalent spherical diameter between about 0.5 µ and about 5 µ; (b) depositing said aqueous suspension of papermaking furnish onto the surface of a traveling foraminous forming fabric (85) to form a wet embryonic papermaking web (98); (c) transferring said wet embryonic papermaking web (98) from the forming fabric (85) to a first transfer fabric (86) traveling at a speed from about 5 % to about 75 % slower than the forming fabric (85); and (d) transferring the wet embryonic papermaking web (98) from the first transfer fabric (86) via at least one further transfer to a drying fabric (90), whereupon said wet embryonic papermaking web (98) is non-compressively dried.

Procédé de production de bandes (71) de papier sanitaire non crêpé, résistant, doux et à faible production de peluches utiles dans la fabrication de produits d'hygiène doux et absorbants, tels que des serviettes de bain, des mouchoirs pour le visage et des lingettes absorbantes. Lesdits papiers comprennent des fibres telles que de la pâte à bois et une charge particulaire, non cellulosique insoluble dans l'eau telle que du kaolin. Le procédé qui permet d'incorporer une charge particulaire non cellulosique dans un papier sanitaire comprend les étapes suivantes: (a) la formation d'une suspension aqueuse de charge pour la fabrication de papier composée de fibres à papier et d'une charge particulaire non cellulosique, ladite charge particulaire étant de préférence constituée d'environ 1 % à environ 50 % du poids total dudit papier et sélectionnée dans le groupe formé par l'argile, le carbonate de calcium, le dioxyde de titane, le talc, le silicate d'aluminium, le silicate de calcium, le trihydrate d'alumine, le charbon actif, l'amidon perlé, le sulfate de calcium, les microsphères de verre, la diatomite et les mélanges de ces substances; la charge particulaire étant plus préférablement encore du kaolin dont le diamètre sphérique équivalent moyen se situe entre environ 0,5 mu et environ 5 g(m); (b) le dépôt de ladite suspension aqueuse de charge pour la fabrication de papier sur la surface d'un tissu (85) de formation poreux mobile pour former une bande (98) humide de papier au stade embryonnaire; (c) le transfert de ladite bande de papier humide du tissu (85) de formation sur un premier tissu (86) de transfert qui se déplace à une vitesse qui est environ 5 % à environ 75 % plus lente que le tissu (85) de formation; et (d) le transfert de la bande (98) de papier humide du premier tissu (86) de transfert via au moins un autre tissu de transfert sur un tissu (90) de séchage sur lequel la bande (98) de papier humide est séchée sans compression.

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