Patent ID: 8956986
Filing Date: 2015-02-17
Classification: C08G,C08L,C09J,D01F,D04H,Y10T

Abstract:
1. A binding fiber for bonding of flat materials containing natural fibers through activation of the binding fiber by heat in a water saturated condition, wherein said binding fiber is a bicomponent fiber of the core/sheath type, wherein the sheath is made from a copolyamide as a first thermoplastic component with the following composition: caprolactam 40-70 mol-%; laurolactam, and/or 12-aminododecanoic acid, 20-50 mol-%; aminoundecanoic acid, 0-10 mol-%; at least one dicarboxylic acid 10-30 mol-% selected from the group of compounds consisting of: wherein the sum of all lactames, all amino acids and all dicarboxylic acids is 100 mol-%; wherein the copolyamide has a relative viscosity of at least 1.50 when measured at 0.5% in m-cresol at 25° C., an MVR of maximum 20 cm wherein the core is made from a further thermoplastic component having a melting temperature above 130° C. in the water saturated condition and a melting temperature of at least 150° C. in the dry condition.