D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 3/02 (2006.01) D21F 11/14 (2006.01)
Patent
CA 2317438
The present invention is a method for maximizing water removal from an absorbent web in a press nip, thus improving the efficiency of a papermaking machine. The present invention uses a pressing unit having a blanket with a void volume and with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web. The improved pressure profile according to the present invention results in increased water removal and/or improved line speed, thus improving efficiency. The configuration and low void volume of the pressing unit blank may further increase water removal and/or improve line speed, which also improves efficiency.
La présente invention concerne un procédé maximisant l'élimination d'eau à partir d'une toile absorbante dans une pince de presse. Cette invention utilise une unité de pressage comprenant un feutre, un volume vide, avec un profil de pression qui permet une élimination maximale d'eau dans la section de pressage ou sur le sécheur frictionneur d'une machine à papier. Selon la présente invention, le profil de pression de l'unité de pressage présente une chute de pression très brutale à la sortie et/ou suivant la sortie d'une courbe de distribution de pression, de manière à maximiser l'élimination d'eau par minimisation de réhumidification de la bande. Le profil de pression amélioré selon l'invention permet d'améliorer l'élimination d'eau et/ou d'améliorer la vitesse de ligne. Le volume vide apporte une contribution supplémentaire à l'élimination d'eau et/ou à l'amélioration de la vitesse de ligne.
Edwards Steven L.
Marinack Robert J.
Mcdowell Jeffrey Charles
Worry Gary L.
Fort James Corporation
Georgia-Pacific Consumer Products Lp
Kirby Eades Gale Baker
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