Vacuum skin packaging structure with high oxygen permeability

Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing

Reexamination Certificate

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Details

C428S034100, C428S035200, C428S035300, C428S035400, C428S035800, C428S035900, C428S036600

Reexamination Certificate

active

07635509

ABSTRACT:
Multilayer film webs having a layer of an oxygen-permeable composition that is a blend of i) an organic acid or organic acid salt, ii) a copolymer of a) ethylene, b) an C3to C8α,β-ethylenically unsaturated carboxylic acid, and optionally c) an alkyl acrylate or alkyl methacrylate comonomer, where greater than 70% of the total acid moieties of (i) plus (ii) are neutralized to the corresponding metal salts, and iii) at least one additional ethylene-containing polymer selected from the group consisting of ethylene homopolymers and ethylene copolymers other than ethylene acid copolymers and ionomers are used to form packaging materials in a process in which a packaging structure is provided that includes the multilayer film web, a vacuum is applied to the packaging structure, and the perimeters of the film web layers are heat sealed.

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International Search Report for PCT/US2006/028069, dated Dec. 14, 2006.

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