Flash-spun sheet material

D - Textiles – Paper – 04 – H

Patent

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Details

D04H 1/56 (2006.01) D01D 5/11 (2006.01) D01F 6/04 (2006.01) D04H 3/16 (2006.01)

Patent

CA 2260830

This invention relates to improved synthetic sheet material useful in protective apparel, which material has a hydrostatic head pressure of at least about 75 cm of water, a Gurley Hill Porosity of less than about 15 seconds, and a Handle-o-meter stiffness of less than 28 mN/g/m2. The sheet material also demonstrates excellent bacteria and particulate barrier properties. The improved sheet material properties are obtained by reducing the ratio of polymer to the spin agent during spinning and by increasing the temperature of the spin solution such that smaller and less cohesive fibers are spun and laid down to form the fabric.

Matériau en feuille synthétique amélioré, utile pour confectionner des vêtements protecteurs, qui possède une pression de refoulement hydrostatique d'au moins environ 75 cm d'eau, une porosité Gurley Hill inférieure à environ 15 secondes et une rigidité Handle-o-meter inférieure à 28 mN/g/m?2¿. Ledit matériau en feuille possède également d'excellentes propriétés de barrière contre les bactéries et les particules. L'amélioration des propriétés de ce matériau est obtenue par réduction du rapport du polymère à l'agent de filage pendant le filage et par augmentation de la température de la solution de filage de manière à ce que des fibres plus petites et moins cohésives soient filées et assemblées pour former le tissu.

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