D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 13/40 (2006.01)
Patent
CA 2512753
The invention concerns a method for preparing a mat containing glass fibers and cellulose fibers, comprising: a step which consists in dispersing in process water chopped glass fibers and cellulose fibers, followed by a step which consists in forming a bed in a forming device by passing the dispersion on a forming fabric through which the process water is drained, the fibers being retained on said fabric, said dispersion comprising at the time of said passage cationic process water; then a step which consists in a heat treatment in a stoving device. Said method enables in particular the production of a web comprising 2 to 12 % of cellulose, 70 to 80 % of glass, 8 to 27 % of binder whereof the tear strength is higher than 430 gf.
L'invention concerne un procédé de préparation d'un voile comprenant des fibres de verre et des fibres de cellulose, comprenant -une étape de mise en dispersion dans une eau de procédé de fibres coupées de verre et de fibres de cellulose, puis, -une étape de formation d'un lit dans un dispositif de formation par passage de la dispersion sur une toile de formation à travers laquelle l'eau de procédé est drainée, les fibres étant retenues sur ladite toile, ladite dispersion comprenant au moment dudit passage une eau de procédé cationique, puis, -une étape de traitement thermique dans un dispositif d'étuvage. Ce procédé permet notamment la réalisation d'un voile comprenant - 2 à 12 % de cellulose, - 70 à 80 % de verre, - 8 à 27 % de liant et dont la résistance à la déchirure est supérieure à 430 gf.
Desaint Jean Carl
Droux Michel
Goudreau Gage Dubuc
Saint-Gobain Technical Fabrics Europe
Saint-Gobain Vetrotex France S.a.
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