Package film with biaxially oriented film and pattern connection layer

Patent metadata

Field	Value
Publication number	US-10160586-B2
Application number	US-201615170384-A
Country	US
Kind code	B2
Filing date	Jun 1, 2016
Priority date	Jun 1, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A package film comprising a biaxially oriented film and pattern connection layer is described. The package film comprises an exterior layer comprising a biaxially oriented film. The biaxially oriented film is a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film. The package film also comprises an interior layer comprising a sealant film, and a pattern connection layer positioned between and directly adjacent each of the exterior layer and the interior layer. The pattern connection layer comprises a solvent-based adhesive or a water-based adhesive. The package film has a secant modulus greater than 120,000 psi and an elongation at break of less than 150%. The package film is adapted to form an evacutable storage bag. Various embodiments of the package films are also described.

First claim

What is claimed is as follows:

1. A package film comprising
an exterior layer comprising a biaxially oriented film, wherein the biaxially oriented film comprises a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film, and wherein the biaxially oriented film has a secant modulus greater than 120,000 psi and an elongation at break of less than 150%,
an interior layer comprising a sealant film, and
a pattern connection layer positioned between and directly adjacent each of the exterior layer and the interior layer, wherein the pattern connection layer comprises a solvent-based adhesive or a water-based adhesive,
wherein the package film has a secant modulus greater than 120,000 psi and an elongation at break of less than 150%, and
wherein the package film is adapted to form an evacutable storage bag.

2. The package film of claim 1 , wherein the biaxially oriented film has a shrinkage value of less than 10% in each of the machine direction and the transverse direction.

3. The package film of claim 1 , wherein the sealant film comprises an interior sealant film layer comprising ionomer; medium density polyethylene; low density polyethylene; ethylene alpha-olefin copolymer; ethylene vinyl acetate; polypropylene; ethyl methyl acrylate; ethylene methacrylic acid copolymer; ethylene acrylic acid; ethylene normal-butyl acrylate; copolymers of ethylene and ethylenically unsaturated comonomer selected from the group consisting of carboxylic acids and esters, salts and anhydrides of carboxylic acids; or blends thereof.

4. The package film of claim 1 , wherein the sealant film comprises at least one non-interior sealant film layer comprising nylon.

5. The package film of claim 1 , wherein the sealant film comprises two non-interior sealant film layers comprising nylon and the two nylon layers are split.

6. The package film of claim 1 , wherein the sealant film is free of EVOH.

7. The package film of claim 1 , wherein the pattern connection layer has a pattern that is circular, elliptical, oval, square, rectangular, diamond, hexagonal, striped, gridded, or dotted.

8. The package film of claim 1 , wherein the pattern connection layer has a pattern that is registered.

9. The package film of claim 1 , wherein the package film has a PPT value of equal to or greater than 3.5 pound-force, in accordance with ASTM D2582-16.

10. The package film of claim 1 , wherein the package film has a PPT value of from 3.5 pound-force to 15 pound-force, in accordance with ASTM 02582-16.

11. An evacutable storage bag comprising
a first package film comprising a first wall of the evacutable storage bag, wherein the first package film comprises
a first exterior layer comprising a first biaxially oriented film, wherein the biaxially oriented film comprises a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film, and wherein the first biaxially oriented film has a secant modulus greater than 120,000 psi and an elongation at break of less than 150%,
a first interior layer comprising a first sealant film, and
a first pattern connection layer positioned between and directly adjacent each of the first exterior layer and the first interior layer, wherein the first pattern connection layer comprises a solvent-based adhesive or a water-based adhesive,
wherein the first package film has a secant modulus greater than 120,000 psi and an elongation at break of less than 150%; and

a second page film comprising a second wall of the evacutable storage bag, wherein the second package film comprises
a second exterior layer comprising a second biaxially oriented film, wherein the second biaxially oriented film comprises a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film, and wherein the second biaxially oriented film has a secant modulus greater than 120.000 psi and an elongation at break of less than 150%,
a second interior layer comprising a second sealant film, and
a second pattern connection layer positioned between and directly adjacent each of the second exterior layer and the second interior layer, wherein the second pattern connection layer comprises a solvent-based adhesive or a water-based adhesive,
wherein second first package film has a secant modulus greater than 120,000 psi and an elongation at break of less than 150%.

12. The evacutable storage bag of claim 11 , wherein the evacutable storage bag further comprises a valve, a resealable component, or a valve and a resealable component.

13. The evacutable storage bag of claim 11 , wherein each of the first sealant film and the second sealant film comprises an interior sealant film layer comprising ionomer; medium density polyethylene; low density polyethylene; ethylene alpha-olefin copolymer; ethylene vinyl acetate; polypropylene; ethyl methyl acrylate; ethylene methacrylic acid copolymer; ethylene acrylic acid; ethylene normal-butyl acrylate; copolymers of ethylene and ethylenically unsaturated comonomer selected from the group consisting of carboxylic acids and esters, salts and anhydrides of carboxylic acids; or blends thereof.

14. The evacutable storage bag of claim 11 , wherein each of the first sealant film and the second sealant film is free of EVOH.

15. The evacutable storage bag of claim 11 , wherein each of the first pattern connection layer and the second pattern connection layer has a pattern that is circular, elliptical, oval, square, rectangular, diamond, hexagonal, striped, gridded, or dotted.

16. The evacutable storage bag of claim 11 , wherein the first pattern connection layer has a pattern that is registered, the second pattern connection layer has a pattern that is registered, or each of the first pattern connection layer and the second pattern connection layer has a pattern that is registered.

17. The evacutable storage bag of claim 11 , wherein the first biaxially oriented film and the second biaxially oriented film have the same or different composition.

18. The evacutable storage bag of claim 11 , wherein the first sealant film and the second sealant film have the same or different composition.

19. The evacutable storage bag of claim 11 , wherein the first pattern connection layer and the second pattern connection layer have the same or different pattern.

Assignees

• Bemis Co Inc

Inventors

• Benthein Michael S
• Berbert Otacilio T

Classifications

• B32B27/08

  of synthetic resin · CPC title

• B65D81/2023 Primary

  in a flexible container (B65D81/2038 takes precedence) · CPC title

• B65D75/26

  Articles or materials wholly enclosed in laminated sheets or wrapper blanks · CPC title

• B32B2307/518

  bi-axially · CPC title

• B32B27/36

  comprising polyesters · CPC title