Patent ID: 7674731

Claim:
A fibre for thermal bonding comprising semicrystalline random copolymers of propylene, 1-hexene and optionally another α-olefin, the amount of 1-hexene being from 0.75 to less than 1.52 mol % with respect to the total weight of the copolymer, the copolymers possessing a value of melt flow rate (MFR) ranging from 4 to 35 g/10 mm and a molecular weight distribution, in terms of the ratio between weight average molecular weight and numeric average molecular weight ( M w / M n ), ranging from 4 to 12, wherein the semicrystalline random copolymers are prepared by polymerization in the presence of Ziegler-Natta catalysts, wherein the semicrystalline random copolymers have a melting point of above 140° C.