US 2018/0009573 A1Published application

Packaging sheet

AssigneeBemis Company, Inc.

InventorsKevin David Glaser, Matthew LeRoy Mengel, Curtis Randolph Barr

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Abstract

A packaging sheet is described. The sheet comprises a first rigid component, a second rigid component, and a multilayer film. Each of the first rigid component and the second rigid component comprises styrenic polymer, aromatic polyester, aliphatic polyester, polypropylene homopolymer, or blends thereof. The multilayer film is a blown, coextruded film positioned between the first rigid component and the second rigid component and comprises (a) an outer layer, (b) a barrier component, and (c) an inner layer, where the barrier component is positioned between the outer layer and the inner layer. The first rigid component is coated on or laminated to a first surface of the multilayer film and the second rigid component is coated on or laminated to an opposing second surface of the multilayer film such that the sheet is not a fully coextruded sheet. Various embodiments of the sheet are also described.

Claims11

Dependent claims

A packaging sheet comprising

a first rigid component comprising styrenic polymer, aromatic polyester, aliphatic polyester, polypropylene homopolymer, or blends thereof;
a second rigid component compromising styrenic polymer, aromatic polyester, aliphatic polyester, polypropylene homopolymer, or blends thereof;
and
a multilayer film comprising (a) an outer layer, (b) a barrier component, and (c) an inner layer, wherein the barrier component is positioned between the outer layer and the inner layer;
and wherein the multilayer film is a blown, coextruded film positioned between the first rigid component and the second rigid component whereby the multilayer film has a first surface and an opposing second surface;
wherein the first rigid component is coated on or laminated to the first surface of the multilayer film and the second rigid component is coated on or laminated to the opposing second surface of the multilayer film whereby the packaging sheet is not a fully coextruded sheet.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/674,742Filed 11 Aug 2017
Priority: 3 Nov 2009
Published: 11 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

B65D 33/00
Details of, or accessories for, sacks or bags
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 27/302
Comprising vinyl polymers; comprising acrylic polymers: comprising aromatic vinyl polymers, e.g. styrenic polymers
B32B 37/153
With at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and…: at…

Family

Application12/611,880Division · filed 3 Nov 2009
Application14/572,924Continuation · filed 17 Dec 2014
Application15/674,742Continuation
Application14/572,924Division
US 2011/0104342 A1Published application
US 2015/0101741 A1Published application
US 2018/0009573 A1This patent

From the US filing history. Foreign family members aren’t listed.