Method of providing a nonwoven fabric with a wide bonding...

Details Method of providing a nonwoven fabric with a wide bonding... Method of providing a nonwoven fabric with a wide bonding...

D - Textiles, Paper

01

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D01F 6/06 (2006.01) B32B 5/02 (2006.01) B32B 5/26 (2006.01) D01F 6/46 (2006.01) D01F 8/06 (2006.01) D04H 1/42 (2006.01) D04H 1/54 (2006.01)

Patent

CA 2209471

There is provided a method of producing a nonwoven fabric with a wide bonding window by forming a nonwoven web from a thermoplastic polymer blend including from about 0.5 weight percent to about 25 weight percent of syndiotactic polypropylene and then thermally bonding the nonwoven web by a method such as thermal point bonding, through-air-bonding and ultrasonic bonding. Such a web has a bonding window at least 10 ~F wider than that of a similar web without syndiotactic polypropylene. Ideally, the bonding window will extend at least 10 ~F below that of a similar web without syndiotactic polypropylene.

L'invention se rapporte à un procédé de production d'un tissu non tissé s'effectuant avec une large fenêtre de liaison et consistant à former une bande non tissée à partir d'un mélange polymère thermoplastique comprenant environ 0,5 % en poids à environ 25 % en poids de polypropylène syndiotactique, puis à enduire thermiquement la bande non tissée selon un procédé de liaison thermique par point, de liaison par air et de liaison à ultrasons. Cette bande a une fenêtre de liaison d'au moins 10 ·F plus large que celle d'une bande similaire sans polypropylène syndiotactique. Idéalement, la fenêtre de liaison devrait avoir une largeur d'au moins 10 ·F inférieure à celle d'une bande similaire sans polypropylène syndiotactique.

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