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US 7,404,999 B2Granted
Anti-blocking barrier composite
AssigneeGraphic Packaging International, Inc.
InventorsDarrel Loel Wilhoit, John Cameron Files
Life of this patent
Estimating the term…
Abstract
A barrier paper has a polymeric layer substantially covering a first side of the paper and an anti-blocking coating on a second side. The polymeric layer has anti-blocking characteristics. A method of making an anti-blocking barrier paper also is provided.
Claims20
A composite comprising:
- (a) a paper substrate having a first side and a second side, wherein the first side has a hold-out coating thereon and the second side has a print coating thereon;
- (b) a barrier layer overlying the hold-out coating;
- and
- (c) an anti-blocking coating overlying the print coating, wherein the anti-blocking coating at least partially defines an outermost surface on the second side of the composite, wherein the anti-blocking coating consists essentially of colloidal silica and, optionally, wax.
1 more element
A method of forming a barrier composite comprising:
- (a) providing a paper having a first side and a second side;
- (b) forming a barrier layer on the first side of the paper;
- and
- (c) applying an anti-blocking coating to the second side of the paper, the anti-blocking coating consisting essentially of colloidal silica and, optionally, a wax.
1 more element
A composite comprising:
- a substrate having a first side and a second side;
- a polymer layer overlying the first side of the substrate, the polymer layer comprising a polymer selected from the group consisting of polyvinylidene chloride, ethylene vinyl alcohol, and polyvinyl alcohol;
- and
- an anti-blocking layer overlying the second side of the substrate, the second anti-blocking layer consisting essentially of colloidal silica and, optionally, a wax,
- wherein
- the composite has a pair of opposite, outermost surfaces, and
- each of the outermost surfaces has anti-blocking characteristics.
4 more elements
A composite comprising:
- a paper substrate having a first side and a second side opposite the first side;
- a substantially continuous polymer layer overlying the first side of the paper substrate, the polymer layer comprising a polymer selected from the group consisting of polyvinylidene chloride, ethylene vinyl alcohol, and polyvinyl alcohol;
- a first anti-blocking layer overlying the substantially continuous polymer layer such that the substantially continuous polymer layer is disposed between the first anti-blocking layer and the paper substrate, wherein
- the first anti-blocking layer is an outermost layer on the first side of the composite, and
- the first anti-blocking layer comprises
- polyvinylidene chloride, and
- colloidal silica, wax, or any combination of colloidal silica and wax;
- a print coating overlying the second side of the paper, the print coating comprising inorganic particles in a binder;
- and
- a second anti-blocking layer overlying the print coating such that the print coating is disposed between the second anti-blocking layer and the paper substrate, wherein
- the second anti-blocking layer is an outermost layer on the second side of the composite, and
- the second anti-blocking layer consists essentially of colloidal silica and, optionally, a wax.
9 more elements
Dependencies are inferred from the claim text.