Coated sheet material and method

Details Coated sheet material and method Coated sheet material and method

B - Operations, Transporting

32

B

B32B 27/10 (2006.01) B05D 1/36 (2006.01) B05D 3/06 (2006.01) B05D 3/10 (2006.01) B32B 7/02 (2006.01) B32B 29/08 (2006.01) D21H 19/20 (2006.01) D21H 19/58 (2006.01) D21H 19/82 (2006.01) D21H 19/84 (2006.01) D21H 27/00 (2006.01) D21H 19/08 (2006.01) D21H 19/12 (2006.01) D21H 19/16 (2006.01)

Patent

CA 2208757

A coated sheet material (22) made by: (a) coating a porous substrate sheet (10) with a barrier coating composition comprising (i) a cross-linkable polymer resistant to penetration by water moisture, and (ii) a water-dispersible film-forming polymer that is resistant to penetration by grease and oil, said barrier coating composition forming a barrier layer (14) on said susbtrate sheet material; and (b) coating said barrier layer with a release coating composition (16). The coated sheet material is useful in forming articles and food wrappers for use in conventional or microwave ovens. The invention includes methods of making articles from the coated sheet materials.

Une feuille (22) portant un revêtement est faite: (a) par application à une feuille de substrat poreuse (10) d'une composition de revêtement constituant une barrière, comprenant (i) un polymère réticulable résistant à la pénétration de l'humidité de l'eau et (ii) un polymère que l'on peut disperser dans l'eau et qui est capable de former un film résistant à la pénétration des graisses et des huiles, ladite composition de revêtement formant une couche barrière (14) sur ladite feuille de substrat; et (b) par application sur cette couche barrière d'une composition anti-adhésion (16). La feuille avec son revêtement est utile pour former des articles et des emballages destinés à être utilisés dans des fours conventionnels ou à micro-ondes. L'invention concerne également des procédés pour fabriquer des articles faits en une feuille portant le revêtement en question.

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