Flexible, flat substrates with an abrasive surface

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 19/16 (2006.01) A47L 13/00 (2006.01) B24D 3/28 (2006.01) C08J 5/14 (2006.01) D21H 19/26 (2006.01)

Patent

CA 2729850

Flexible, flat substrate with an abrasive surface obtained by applying an aqueous solution or dispersion of at least one pre-condensate of a thermally curable resin onto the top side and/or the bottom side of a flexible, flat substrate in an amount in the range of 0.1 to 90 wt.-% relative to the uncoated, dry substrate, cross- linking the pre-condensate and drying the treated substrate, characterized in that the aqueous solution or dispersion of at least one pre-condensate of a thermally curable resin comprises (i) a polymeric thickener selected from the group consisting of. biopolymers, associative thickeners and fully synthetic thickeners in an amount of 0.01 wt.-% to 10 wt.-% and optionally (ii) a curing agent that only catalyzes further condensation of the thermally curable resin at temperatures greater than about 60 °C.

L'invention concerne des substrats flexibles étendus avec surface abrasive, obtenus par application d'une solution ou dispersion aqueuse d'au moins un précondensat d'une résine thermodurcissable sur la face supérieure et/ou sur la face inférieure d'un substrat flexible étendu dans une quantité comprise entre 0,1 et 90 % en masse par rapport au substrat sec non revêtu, par réticulation du précondensat et séchage du substrat traité. L'invention est caractérisée en ce que la solution ou dispersion aqueuse d'au moins un précondensat d'une résine thermodurcissable contient (i) un épaississant polymère sélectionné dans le groupe composé de : biopolymères, épaississants associatifs et épaississants entièrement synthétiques, dans une quantité comprise entre 0,01 % en masse et 10 % en masse et éventuellement (ii) un durcisseur qui ne catalyse qu'à partir de températures de l'ordre de 60 °C la poursuite de la condensation de la résine thermodurcissable.

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