Patent ID: 6066388
Filing Date: 2000-05-23
Classification: B32B,D04H,Y10T

Abstract:
Nonwoven comprising two outer fibre layers and at least one inner fibre layer, the nonwoven comprising constructive fibres composed of a first polymer and binding fibres, the binding fibres being composed at least partially of a second thermoplastic polymer having a melting point which is lower than that of the first polymer, the nonwoven being characterized in that the inner layer or inner layers represent from 20 to 90% by weight of the nonwoven, and the outer layers each represent between 5 and 40% by weight of the nonwoven, the outer layers comprising at the very least 40% by weight of binding fibres, and having at least 5% by weight of the first polymer, the nonwoven being densified by needling on either side to a specific depth, there remaining a central zone not densified by needling, and the amount, based on percentage by weight, of the second polymer, being greater in the outer layers than in the inner layer or inner layers and the constructive fibres of the outer layers being finer than the constructive fibres of the inner layer.