Polyolefin foam/film composite structure and method for...

B - Operations – Transporting – 32 – B

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B32B 5/18 (2006.01) B32B 25/08 (2006.01) B32B 27/32 (2006.01) C08L 23/04 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2382029

A composite structure (10) generally includes a) a polyolefin foam sheet (12); and b) a film (14) in adherence with the foam sheet (12). The film includes a blend of polyethylene and a thermoplastic elastomer. The elastomer includes a copolymer or terpolymer having a styrenic component and a rubbery component, the rubbery component having at least one carbon-carbon double bond. The rubbery component makes up at least about 70 wt.% of the thermoplastic elastomer. The resultant composite structure has a coefficient of friction ranging from about 0.5 to about 2.0, as measured at the upper surface (16) of the film (14), and therefore is advantageously used as a tool box liner, a non-skid foam to permit people to walk on the foam with a minimized risk of slipping and falling, or a packaging foam that clings well to a packaged article.

L'invention concerne une structure composite (10) généralement constituée de a) une feuille de mousse polyoléfinique (12), et b) un film (14) adhérant à la feuille de mousse (12). Le film comprend un mélange de polyéthylène et d'élastomère thermoplastique. L'élastomère est constitué d'un copolymère ou d'un terpolymère qui contient un composant styrénique et un composant caoutchouteux, le composant caoutchouteux comprenant au moins une liaison double carbone-carbone. Ce composant caoutchouteux constitue au moins 70 % en poids de l'élastomère thermoplastique. La structure composite qui en résulte possède un coefficient de friction compris entre environ 0,5 et 2, lorsqu'il est mesuré sur la surface supérieure (16) du film (14), et c'est pourquoi il est utilisé avantageusement comme revêtement intérieur d'une boîte à outils, comme mousse antidérapante permettant aux humains de marcher dessus avec des risques réduits de glisser et de tomber, ou comme mousse d'emballage adhérant facilement à un article emballé.

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