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

• Main Authors: PATRICK LAUFFENBURGER, RALPH BERKEMANN
• Format: Patent
• Language: English; Spanish
• Published: 07.08.2017
• 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. La invención proporciona una red de electretos no tejida que comprende fibras hechas con un material polimérico termoplástico que comprende un polímero, un primer aditivo (a) y un segundo aditivo (b), en donde el primer aditivo (a) comprende una amina impedida y el segundo aditivo (b) comprende una sal metálica de un ácido carboxílico y/o una amida orgánica derivada de un ácido carboxílico y una amina. La invención además proporciona un proceso para producir la red de electretos no tejida, una fibra, un proceso para producir la fibra, una lámina multicapa y el uso de la red de electretos no tejida, la fibra o la lámina multicapa como un material de filtro o como tela para quitar polvo para limpieza.