Adhesion promoters for multistructural laminates

Details Adhesion promoters for multistructural laminates Adhesion promoters for multistructural laminates

C - Chemistry, Metallurgy

09

J

C09J 123/00 (2006.01) C09J 123/04 (2006.01) C09J 123/10 (2006.01)

Patent

CA 2571038

Compositions and methods for improving the adhesion of a film to a nonwoven, a film to another film, or a nonwoven to another nonwoven are disclosed. Depending on the laminate or multilaminate structure, the improvement can be achieved by using low viscosity, low density ethylene- or propylene-based polymers, which physically anchor to the substrate, such as a porous nonwoven, or by using a similar polymer in a blend with one of the substrate film polymers to improve flow and adhesion.

La présente invention concerne des compositions et des procédés permettant d'améliorer l'adhérence d'un film sur un non-tissé, d'un film sur un autre film ou d'un non-tissé sur un autre non-tissé. En fonction du stratifié ou de la structure multistratifiée, cette amélioration peut être obtenue via des polymères à base de propylène ou d'éthylène de faible densité et de faible viscosité, qui s'accrochent physiquement au substrat, tels que des non-tissés poreux, ou via un polymère similaire dans un mélange avec un des polymères film du substrat de façon à améliorer l'écoulement et l'adhérence.

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