Film and producing method therefor

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/18 (2006.01) B32B 27/06 (2006.01) B32B 27/08 (2006.01) B32B 27/30 (2006.01) B65D 30/02 (2006.01) B65D 65/02 (2006.01) B65D 65/40 (2006.01) C08J 7/04 (2006.01) C08L 33/02 (2006.01) C08L 35/00 (2006.01)

Patent

CA 2483317

A film or laminate which comprises a polycarboxylic acid polymer and a compound of a polyvalent metal, serves as an excellent barrier to gases, e.g., oxygen, and has such resistance that the appearance, shape, and gas-barrier properties are not impaired by neutral water, high-temperature water vapor, or hot water; and a process for industrially easily producing the film or laminate at low cost. The film or laminate is suitable for use as a package, packaging container, or vacuum insulation material for articles which are apt to be deteriorated by oxygen, etc., such as foods, beverages, chemicals, medicines, and metallic precision parts, e.g., electronic parts. Furthermore, a packaging material can be provided therefrom which is suitable for use for articles which are required to be stably insulated from gases over long and should be treated under high-temperature hot-water conditions as in boiling or retortion sterilization.

La présente invention concerne un film ou un laminé qui comprend un polymère d'acide polycarboxylique et un composé d'un métal polyvalent. Ce film constitue une excellente barrière arrêtant les gaz tels que l'oxygène. En outre, ses qualités de résistance font que son aspect, sa forme, et son efficacité comme barrière aux gaz ne sont pas altérés par l'eau neutre, la vapeur d'eau à haute température, ou l'eau chaude. L'invention concerne également un procédé permettant facilement de produire industriellement à faible coût ce film ou laminé. Ce film ou laminé convient comme produit d'emballage, de conditionnement ou d'isolation sous vide pour des articles susceptibles d'être détériorés par l'oxygène, notamment, les aliments, les boissons, les produits chimiques, les médicaments et les pièces métalliques de précision telles que les pièces électroniques. De plus, ce matériau se prête à la confection de conditionnements convenant à des articles devant être isolés de façon stable de gaz pendant longtemps, et qui doivent être traités à haute température, dans l'eau chaude, notamment pour la stérilisation à l'eau bouillante ou en autoclave.

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