NONWOVEN WEB AND FIBERS WITH ELECTRET PROPERTIES, MANUFACTURING PROCESSES THEREOF AND THEIR USE

• Main Authors: BERKEMANN, RALPH, LAUFFENBURGER, PATRICK
• Format: Patent
• Language: English; French
• Published: 17.09.2019
• Subjects: BRAIDING; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; KNITTING; LACE-MAKING; LAUNDERING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TEXTILES; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; TRIMMINGS; WADDING

The invention provides a nonwoven electret web comprising fibers made from a thermoplastic polymer material which comprises a polymer, a first additive (a) and a second additive (b), wherein the first additive (a) comprises a hindered amine and the second additive (b) comprises a metal salt of a carboxylic acid and/or an organic amide derived from a carboxylic acid and an amine. The invention further provides a process for making the nonwoven electret web, a fiber, a process for making the fiber, a mullti-layer sheet, and the use of the nonwoven electret web, the fiber or the multilayered sheet as a filter material or as a dust-removing fabric for cleaning purposes. L'invention porte sur une bande d'électret de non-tissé comprenant des fibres formée à partir d'un matériau polymère thermoplastique qui comprend un polymère, un premier additif (a) et un second additif (b), le premier additif (a) comprenant une amine encombrée et le second additif (b) comprenant un sel métallique d'un acide carboxylique et/ou un amide organique issu d'un acide carboxylique et d'une amine. L'invention porte en outre sur un procédé pour la fabrication de la bande d'électret de non-tissé, sur une fibre, sur un procédé pour la fabrication de la fibre, sur une feuille multicouche et sur l'utilisation de la bande d'électret de non-tissé, de la fibre ou de la feuille multicouche comme matériau filtrant ou comme tissu de dépoussiérage à des fins de nettoyage.