Bonded structures of textile materials
AssigneeCassella Aktiengesellschaft
InventorsHans Honel, Walter Michel, Steffen Piesch, Karin Schluter, Manfred Seidel, Wolfgang Spieler
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Abstract
A bonded structure of textile materials bonded by a melamine-formaldehyde precondensate is produced by applying to a textile material a melamine-formaldehyde precondensate with a molar ratio of melamine to formaldehyde of 1:(0.8 to 1.26) to form a composite and then compressing the composite with an overpressure of 1 to 200 bars at temperature of from 130.degree. to 220.degree. C.
Claims11
In a bonded structure of textile materials bonded by a melamine-formaldehyde precondensate and cured at an elevated temperature and a elevated pressure, the improvement comprises said melamine-formaldehyde precondensate having been prepared by heating melamine in an aqueous solution or suspension with formaldehyde in a molar ratio of 1:(0.8 to 1.26) at a pH value of 7-11 in the presence of 1 to 25% by weight of modifying agents relative to the total weight of melamine and formaldehyde, and at least 1.0% being an alkali metal salt or alkaline earth metal salt of amidosulphonic acid, at temperatures of 105.degree. to 160.degree. C. until a limited dilutability with water is achieved or further heating until an unlimited dilutability with water is achieved.
Dependencies are inferred from the claim text.