Biodegradable, liquid impervious monolayer film compositions

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/18 (2006.01) A61L 15/62 (2006.01) C08L 67/04 (2006.01) C08L 75/06 (2006.01) A61F 13/46 (1995.01)

Patent

CA 2138121

Biodegradable, liquid impervious monolayer film compositions are disclosed. In particular, the monolayer films comprise composite structures derived from blends of biodegradable polymers. The biodegradable polymers are selected from the categories of moisture sensitive polymers, thermally sensitive polymers, mechanically limited polymers, polymers not easily processed into films, hydrolytically cleavable polymers, and degradable elastomers. The biodegradable polymers are combined in various ways to overcome the deficiencies of the individual components, yet at the same time impart specific performance properties to the film. The monolayer film compositions are suitable for use as backsheets in disposable absorbent products including diapers, adult incontinent pads, sanitary napkins, pantiliners, and the like.

L'invention se rapporte à des compositions de films monocouches, biodégradables et imperméables aux liquides. Ces films monocouche comprennent en particulier des structures composites dérivées de mélanges de polymères biodégradables. Les polymères biodégradables sont choisis parmi les catégories de polymères sensibles à l'humidité, de polymères thermosensibles, de polymères à limites mécaniques, de polymères dont la transformation sous forme de film est difficile, de polymères à clivage hydrolytique et d'élastomères dégradables. Les polymères biodégradables sont combinés de différentes manières pour surmonter les défauts des constituants individuels, tout en conférant des caractéristiques fonctionnelles spécifiques au film. Ces compositions de films monocouches peuvent être utilisées comme feuilles de support dans des produits absorbants jetables tels que les couches, des articles absorbants destinés à l'incontinence pour adultes, des serviettes hygiéniques, des protège-slips et articles analogues.

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