Process for producing workpieces and molded pieces out of...

D - Textiles – Paper – 21 – B

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D21B 1/12 (2006.01) C08L 1/02 (2006.01) C08L 97/02 (2006.01) D21B 1/00 (2006.01) D21H 11/18 (2006.01) D21J 1/00 (2006.01) D21J 1/06 (2006.01)

Patent

CA 2237942

This invention concerns a process for producing fiber-reinforced materials using physical methods which is characterized by an extraordinary increase in the intermolecular hydrogen-bonding by means of a corresponding, physical enlargement of the specific fiber surface and a refinement of the fiber structure suited for contact formation, wetting, and felting. This is done by continuous grinding of the cellulose fibers or other fibers and plants containing cellulose in a refiner or other suitable fiber crushing or defibering equipment. Subsequently, after optional preliminary drying, the aqueous microfiber pulp is molded and dried. The primary material hardens by itself through drying and concomitant shrinkage, without addition of bonding or filler materials and without use of any external pressure, to a specific gravity of 1.5.

L'invention concerne un procédé de production de matériaux renforcés par des fibres, caractérisé par l'augmentation exceptionnelle des liaisons hydrogènes à effet intermoléculaire, obtenue par des méthodes physiques, par agrandissement physique correspondant de la surface de fibres spécifique et par amélioration de la structure de fibres appropriée à la formation de contact, à la réticulation et au feutrage. Les fibres de cellulose ou autres fibres ou plantes renfermant de la cellulose sont finement broyées par raffinage permanent dans un raffineur ou autres appareils de triturage de fibres et de défibrillation adéquats. Puis, après une éventuelle déshydratation préalable, on procède au moulage et au séchage de la pâte de microfibres aqueuse. La matière première peut durcir d'elle-même jusqu'à des poids spécifiques de 1,5 par séchage progressif et contraction induite, sans ajout d'agent adhésif ni de matière de charge et sans l'application de pressions extérieures.

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