Nonwoven fabric from polymers containing particular types of...

D - Textiles – Paper – 01 – F

Patent

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Details

D01F 6/30 (2006.01) B32B 5/02 (2006.01) B32B 5/24 (2006.01) D04H 1/42 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2210914

There is disclosed fibers and fabrics formed from a polymer which is a "hand enhancing" polymer. The "hand enhancing" polymer is a copolymer of polypropylene which contains ethylene, 1-butene, or 1-hexene or a terpolymer of propylene, ethylene and butene. If the polymer is an ethylene copolymer, the copolymer may be random or random and block and the ethylene must be present in an amount between greater than 5 and 7.5 weight percent of the copolymer. If the copolymer contains 1-butene, it must be present in an amount between 1 and 15.4 weight percent of the copolymer. If the copolymer contains 1-hexene, it must be present in an amount between 2 and weight percent of the copolymer. If the polymer is a terpolymer of propylene, ethylene and butylene, the polypropylene is present in an amount between 90 and 98 weight percent, the ethylene is present in an amount between 1 and 6 weight percent and the butylene is present in an amount between 1 and 6 weight percent. The fibers may additionally have a second polymer adjacent the first polymer in a sheath/core, islands-in-the-sea or side-by-side conjugate orientation.

L'invention porte sur des fibres et des tissus fabriqués dans un polymère renforçant la douceur au toucher. Ce polymère est un copolymère de polypropylène contenant de l'éthylène, du 1-butène, ou du 1-hexène ou un terpolymère de propylène, éthylène, butène. Si ledit polymère est un copolymère d'éthylène, il peut être du type aléatoire, ou aléatoire bloc, l'éthylène représentant plus de 5 à 7,5 % en poids du copolymère. Si ledit polymère contient du 1-butène, il doit représenter entre 1 à 15,4 % en poids du copolymère. Si ledit polymère contient du 1-hexène, il doit représenter entre 2 à 5 % en poids du copolymère. Si ledit polymère est un terpolymère de propylène, éthylène, butène, le polypropylène doit représenter entre 90 et 98 % en poids, l'éthylène, entre 1 et 6 % en poids et le butylène entre 1 et 6 % en poids. Les fibres peuvent contenir, de plus, un second polymère contigu au premier et disposé selon une orientation conjuguée du type gaine/noyau, île/mer ou côte-à-côte.

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