Barrier film with enhanced adhesive properties

• US 20070004299A1
• Filed: 06/06/2006
• Published: 01/04/2007
• Est. Priority Date: 06/17/2005
• Status: Abandoned Application

• Current Assignee: Toray Plastics (America), Inc. (Toray Industries Incorporated)
• Original Assignee: Toray Plastics Incorporated Lumirror Division
• Inventors: Chicarella, Gianfranco, Sargeant, Steven, Adams, Bonnie, Fitch, John
• Application Number:
  US11/447,280
• Publication Number:
  US 20070004299A1
• Time in Patent Office: Days
• US Class Current: 442/59
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: C08J 2429/00 Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/048 Forming gas barrier coatings
• CPC Class Codes: Y10T 442/20 Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer

Abstract

Described are barrier films that include a modified polyvinyl alcohol/polyvinyl amine coating resin. The barrier films exhibit a combination of good oxygen barrier properties, moisture resistance and adhesion properties characteristics.

Claims

1. A thermoplastic film comprising:

a thermoplastic substrate; and

a barrier layer comprises a polyvinyl alcohol-polyvinyl amine and an epichlorohydrin cross-linking material disposed on a surface of the thermoplastic substrate.

2. The film of claim 1, comprising a barrier layer composition comprising 1 wt. % to 25 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of the composition.

3. The film of claim 1, comprising a barrier layer composition comprising 3 wt. % to 10 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of the composition.

4. The film of claim 1, comprising a barrier layer composition comprising 0.5 wt. % to about 10 wt. % epichlorohydrin cross-linking material, based upon the total weight of the composition.

5. The film of claim 1, comprising a barrier layer composition comprising 1 wt. % to 5 wt. % epichlorohydrin cross-linking material, based upon the total weight of the composition.

6. The film of claim 1, wherein the thermoplastic substrate comprises a polyester, an aromatic polyester, a copolyester, a homopolyester, a polyethylene terephthalate, a glycolised polyester terephthalate, polypropylene, or a mixture thereof.

7. The film of claim 1, wherein the barrier layer is applied to the substrate in a inline coating process.

8. The film of claim 1, further comprising a layer comprising metal on the barrier layer.

9. A process comprising:

preparing a mixture comprising polyvinyl alcohol-polyvinyl amine;

crosslinking the polyvinyl alcohol-polyvinyl amine mixture with an epichlorohydrin cross-linking material; and

disposing the cross-linked mixture upon a thermoplastic substrate.

10. The process of claim 9, comprising a barrier layer composition comprising 1 wt. % to 25 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of the composition.

11. The process of claim 9, comprising a barrier layer composition comprising 3 wt. % to 10 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of the composition.

12. The process of claim 9, comprising a barrier layer composition comprising 0.5 wt. % to 10 wt. % epichlorohydrin cross-linking material, based upon the total weight of the composition.

13. The process of claim 9, comprising a barrier layer composition comprising 1 wt. % to 5 wt. % epichlorohydrin cross-linking material, based upon the total weight of the composition.

14. The process of claim 9, wherein the thermoplastic substrate comprises a polyester, an aromatic polyester, a copolyester, a homopolyester, a polyethylene terephthalate, a glycolised polyester terephthalate, polypropylene, or a mixture thereof.

15. The process of claim 9, wherein the barrier layer is applied to the substrate in an inline coating process.

16. The process of claim 9, further comprising depositing a layer comprising metal on a layer comprising the cross-linked mixture.

17. A barrier layer comprising:

a polyvinyl alcohol-polyvinyl amine and an epichlorohydrin cross-linking material.

18. The barrier layer of claim 17, comprising 1 wt. % to 25 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of a composition forming the barrier layer.

19. The barrier layer of claim 17, comprising 3 wt. % to 10 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of a composition forming the barrier layer.

20. The barrier layer of claim 17, comprising 0.5 wt. % to about 10 wt. % epichlorohydrin cross-linking material, based upon the total weight of a composition forming the barrier layer.

21. The barrier layer of claim 17, comprising 1 wt. % to 5 wt. % epichlorohydrin cross-linking material, based upon the total weight of a composition forming the barrier layer.

22. A metallized barrier film comprising:

a substrate;

a barrier layer comprises a polyvinyl alcohol-polyvinyl amine and an epichlorohydrin cross-linking material disposed on a surface of the substrate; and

a layer comprising metal deposited onto the barrier layer.

23. The metallized film of claim 22, comprising 1 wt. % to 25 wt. % polyvinyl alcohol-polyvinyl amine, based upon the total weight of a composition forming the barrier layer.

24. The metallized film of claim 22, comprising 0.5 wt. % to about 10 wt. % epichlorohydrin cross-linking material, based upon the total weight of a composition forming the barrier layer.

25. The metallized film of claim 22, wherein the layer comprising metal is vapor deposited.

26. The metallized film of claim 22, wherein the layer comprising metal comprises aluminum.