Method and apparatus for making soft tissue

Details Method and apparatus for making soft tissue Method and apparatus for making soft tissue

D - Textiles, Paper

21

F

D21F 11/00 (2006.01) D21F 1/48 (2006.01) D21F 1/52 (2006.01) D21F 5/14 (2006.01) D21F 5/18 (2006.01) D21F 11/14 (2006.01)

Patent

CA 2252695

An uncreped tissue sheet having improved softness results from supplementally dewatering a wet web to a consistency of greater than about 30 percent using noncompressive dewatering techniques (30) prior to a differential speed transfer (37) and subsequent throughdrying (44). An air press (30) particularly well suited for providing the supplemental noncompressive dewatering incorporates side (80) and/or end seals (78) to minimize escape of pressurized fluid.

On décrit une bande de papier non crêpé, très douce, que l'on obtient selon un procédé consistant à déshydrater plus qu'auparavant, à l'aide de techniques de déshydratation (30) non compressives, une nappe mouillée, afin que celle-ci ait une consistance supérieure à environ 30 %, avant de transférer (37) cette nappe à une vitesse différentielle, puis à lui faire subir une étape ultérieure de séchage complet (44). Une presse à air (30), particulièrement bien conçue pour exécuter la déshydratation supplémentaire et non compressive, comprend des scellements latéraux (80) ou d'extrémité (78) afin de minimiser toute fuite de fluide sous pression.

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