Transparent oxygen-scavenging article including...

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 1/00 (2006.01) B32B 27/36 (2006.01) B65D 81/24 (2006.01) C08G 63/18 (2006.01) C08J 5/18 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2266503

A transparent oxygen-scavenging article for packaging oxygen-sensitive products, such as beer, juice, ketchup, etc. The oxygen-scavenging article includes a biaxially-oriented <u>aromatic</u> polyester polymers such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), and an oxygen-scavenging aromatic ester polymer compatible with the polyester polymer. The oxygen-scavenging polymer includes aromatic groups and alpha- hydrogen carbonyl groups of formula (I). Examples are polyesters from succinic, glutaric, adipic or suberic acid with hydroquinone, bisphenol A, styrene oxide or distyrene glycol or an aliphatic dicarboxylic acid containing copolyethylene naphthalate. Both polymers could form a copolymer, a blend or preferably different layers of the article. The oxygen-scavenging polymer may be incorporated into a barrier package at a competitive price, and provide the desired properties of transparency, thermal resistance, and pressurized strength.

Article désoxygénant transparent, destiné à emballer des produits sensibles à l'oxygène, tels que bière, jus, ketchup, etc. L'article comprend un polyester aromatique biaxialement orienté, tel que le polyéthylène téréphtalate (PET) ou le polyéthylène naphtalate (PEN), et un polymère d'un ester aromatique désoxygénant compatible avec le polymère de polyester. Ce dernier contient des groupes aromatiques et des groupes alpha-hydrogène carbonyles de formule (I). Les polyesters sont par exemple les acides succinique, glutarique, adipique et subérique, avec l'hydroquinone, le bisphénol A, le styrène oxyde ou le distyrène glycol, ou un acide dicarboxylique aliphatique contenant du copolyéthylène naphtalate. Les deux polymères peuvent constituer un polymère, un mélange ou, de préférence, différentes couches de l'article. Le polymère désoxygénant peut être incorporé à un emballage barrière à un prix compétitif, et donne les propriétés désirées de transparence, résistance à la chaleur et résistance à la pression.

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