D - Textiles – Paper – 04 – H
Patent
D - Textiles, Paper
04
H
D04H 3/14 (2006.01) D01F 8/04 (2006.01) D01F 8/14 (2006.01) D04H 13/00 (2006.01)
Patent
CA 2616853
The invention provides a sheet material comprising bicomponent filaments having first and second polymer components that are arranged in substantially distinct zones within the filaments, with the first polymer component formed of a relatively lower melting polymer and the second component formed of a relatively higher melting polymer. The filaments of the nonwoven fabric layer are densely arranged and compacted against one another to form smooth, substantially nonporous opposite outer surfaces, and the nonwoven fabric layer are calendered such that the lower melting sheath polymer is fused to the contacting surface portions of adjacent filaments to impart strength and coherency to the nonwoven fabric layer. The sheet material has excellent breathability and liquid barrier properties and may be useful in house wrap, medical garments, and envelope applications.
L'invention concerne un matériau en feuille comprenant des filaments de biocomposants, avec un premier et un second composant polymérique disposés dans des zones sensiblement différentes des filaments, le premier composant polymérique étant formé d'un polymère de fusion relativement inférieur et le second composant étant formé d'un polymère de fusion relativement supérieur. Les filaments de la couche de tissu non tissé sont distribués de manière dense et compacte les uns contre les autres de manière à former des surfaces extérieures opposées sensiblement non poreuses, et la couche de tissu non tissé est calandrée de manière que le polymère de fusion inférieur fonde au niveau des parties de surface de contact des filaments adjacents afin de favoriser la résistance et la cohésion de la couche de tissu non tissé. Le matériau en feuille présente d'excellentes propriétés de respirabilité et d'imperméabilité, et peut être utilisé dans des articles d'emballage domestique, des articles médicaux, et des applications de revêtement.
Baker John Frank Jr.
Farrell Gregory W.
Schoppman Shannon
Fiberweb Inc.
Sim & Mcburney
LandOfFree
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