초록 ▼

There is disclosed herein improved packages, and methods of forming same, of the type wherein a container, such as for example a glass container, like a bottle or jar, is provided externally thereof with a heat shrunk, cellular thermoplastic member, circumferentially and snugly engaging a sidewall p

There is disclosed herein improved packages, and methods of forming same, of the type wherein a container, such as for example a glass container, like a bottle or jar, is provided externally thereof with a heat shrunk, cellular thermoplastic member, circumferentially and snugly engaging a sidewall portion of the container; the improvement resides in employing as the thermoplastic member a composite structure, or laminate, of a closed cellular polymeric layer in which the polymer is a polymer of predominantly olefin moieties and, in adhered relationship to the closed cellular layer, a non-cellular polymeric layer n which the polymer is a polymer of predominantly olefin moieties with the cellular layer being in snug, heat shrunk engagement with the sidewall portion of the container and the non-cellular layer being disposed outwardly of the cellular layer.

대표청구항 ▼

A heat shrinkable two layer sleeve shaped article having a major orientation circumferentially of said sleeve and adapted to be telescopically located about the sidewall of a container, and heat shrunk into snug engagement with said sidewall, said article comprising a composite structure consisting

A heat shrinkable two layer sleeve shaped article having a major orientation circumferentially of said sleeve and adapted to be telescopically located about the sidewall of a container, and heat shrunk into snug engagement with said sidewall, said article comprising a composite structure consisting essentially of two layers, one of said layers consisting essentially of a closed cellular polyethylene layer and the other of said layers consisting essentially of a noncellular polyethylene layer in adhering contact with said cellular layer, said composite structure having been formed by blown bubble coextrusion with a blow up ratio of about 2:1 or less and having a machine direction heat shrinkage of at least 50% and a cross direction heat shrinkage of 20% or less, the heat shrinkage of said sleeve in the circumferential direction corresponding to the machine direction heat shrinkage and the heat shrinkage of said sleeve in the axial direction corresponding to the cross direction heat shrinkage, said polyethylene of said cellular and said non-cellular layer being independently selected from the group consisting of high density polyethylene, low density polyethylene, medium density polyethylene and blends thereof.