METHOD FOR PRODUCING DUROPLASTIC FINE-FIBER NON-WOVENS HAVING A HIGH FLAME-RETARDANT, THERMAL PROTECTIVE AND SOUND INSULATING EFFECT

• Main Authors: RIEDEL, BERND, BUCKA, HARTMUT
• Format: Patent
• Language: English; French
• Published: 04.03.2014
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; BRAIDING; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; GENERAL PROCESSES OF COMPOUNDING; KNITTING; LACE-MAKING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; NON-WOVEN FABRICS; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRIMMINGS; WADDING; WORKING-UP

The invention relates to a method for producing duroplastic fine-fiber non-wovens, characterized in that: a) melts of reactive three-dimensionally cross-linkable, non-linear prepolymers are extruded by nozzles; b) the exiting melts are blown by means of hot air to form fine fibers; c) the fine fibers are separated by the flow of air and deposited to form a non-woven comprised of a fine-fiber weave; d) the non-woven is subsequently compacted, and ; e) the non-woven is treated with a medium that initiates a three-dimensional cross-linking, and the fine fibers in the non-woven are inherently bonded and/or hardened in a subsequent thermal post-hardening. This enables duroplastic fine-fiber non-wovens to be economically produced that have both a high flame retardant effect as well as a high thermal protection, sound insulation and filtering capacity. L'invention concerne un procédé de production de non-tissés thermodurcissables à fibres superfines, caractérisé en ce que a) des masses fondues de prépolymères réactifs non linéaires réticulables en trois dimensions sont poussées à travers des filières, b) les masses fondues sortant sont soufflées au moyen d'air chaud pour former des fibres superfines, c) ces fibres superfines sont séparées du flux d'air et déposées sous la forme d'un non-tissé constitué d'un entrelacement de fibres superfines, d) le non-tissé est compacté, e) il est traité au moyen d'un agent induisant une réticulation tridimensionnelle, puis les fibres superfines sont collées et/ou durcies à l'intérieur du non-tissé lors d'une étape de post-traitement thermique. Ce procédé permet de produire de façon économique des non-tissés thermodurcissables à fibres superfines qui possèdent un effet protecteur accru en matière d'ignifugation et d'isolation thermique et acoustique et un haut pouvoir filtrant.