Manufacturing three dimensional surface structure web

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 3/00 (2006.01) D21F 11/00 (2006.01) F26B 13/06 (2006.01) F26B 13/16 (2006.01) F26B 13/28 (2006.01)

Patent

CA 2474489

In a method for manufacturing a fiber web (12), in particular a web of tissue or hygiene material, provided with a three dimensional surface structure, the fiber web is pressed at a dry content of less than 35%, in particular less than 30%, and preferably less than 25% onto an imprinting fabric (14) by a first pressure field and is thereby pre-imprinted, and in which the fiber web is guided through at east one pressure field (third pressure field) provided for dewatering and or drying said fiber web. Preferably, the fiber web is once more pressed onto an imprinting fabric by means of a second pressure field in order to fix strength without destroying the three dimensional surface structure. The fiber web is preferably guided between the first and the second pressure field through said at least one third pressure field. Preferably, the same imprinting fabric is used in said first pressure field and said second pressure field. Moreover, the dry content is achieved by a favorably priced apparatus instead of by TAD drying apparatus.

Dans un procédé de fabrication d'un voile de fibres (12), en particulier d'un voile de tissu ou d'un matériau hygiénique, doté d'une structure de surface tridimensionnelle, le voile de fibres est pressé, à une teneur en matière sèche inférieure à 35 %, en particulier inférieure à 30 %, et de préférence inférieure à 25 % sur un tissu à estamper (14) par un premier champ de pression, et est ainsi pré-estampé, et le voile de fibres est guidé à travers au moins un champ de pression (3ème champ de pression) servant à évacuer l'eau ou à sécher le voile de fibres. De préférence, le voile de fibres pressé une fois de plus sur un tissu à estamper au moyen d'un second champ de pression afin de fixer les propriétés de résistance sans détruire la structure de surface tridimensionnelle. Le voile de fibres est de préférence guidé entre le premier champ de pression et le second champ de pression par le biais d'au moins un troisième champ de pression. De préférence, le même tissu à estamper est utilisé dans ledit premier champ de pression et dans ledit second champ de pression. En outre, la teneur en matière sèche est atteinte par le biais d'un appareil peu onéreux au lieu d'un appareil de séchage TAD.

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