Method for producing a glass mat

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 13/40 (2006.01) C03C 25/12 (2006.01) C03C 25/26 (2006.01) D21H 23/76 (2006.01) D21H 21/08 (2006.01)

Patent

CA 2388211

The invention relates to glass mats and their method of manufacture. In particular, the invention relates to a wet-laid method of making a glass mat and the mats formed by this method. The method includes combining a dispersant, water, glass fiber bundles, and a charged viscosity modifier to form a slurry, adding an oppositely charged viscosity modifier to the slurry, and removing the water from the slurry to form a wet glass mat. The present invention enables improved control of fiber dispersion and subsequent bundling of the fibers to form, for example, bundled glass mats with high porosity and a uniform weight. Mats produced by the present invention may be formed into a variety of products, such as in glass fiber paper, roofing shingles, and composite articles.

L'invention concerne des mats de verre et leur procédé de fabrication. Elle porte notamment sur un procédé par voie humide de fabrication d'un mat de verre et sur les mats formés par ledit procédé. Ledit procédé consiste à combiner un dispersant, de l'eau, des touffes de fibres de verre et un modificateur de viscosité chargé, de sorte qu'une suspension aqueuse soit formée, à ajouter un modificateur de viscosité chargé dans ladite suspension, et à enlever l'eau de la suspension, de manière qu'un mat de verre sec soit formé. Le procédé de l'invention permet le contrôle amélioré de la dispersion des fibres et la mise en touffes des fibres pour la production, par exemple, de mats de verre en touffes, présentant une porosité élevée et un poids homogène. Les mats produits par le procédé de l'invention peuvent se présenter sous la forme de divers produits, tels que du papier de fibres de verre, des bardeaux de construction et des articles composites.

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