Multilayer package structure for ozone scavenging

Patent metadata

Field	Value
Publication number	US-11618244-B2
Application number	US-201716649778-A
Country	US
Kind code	B2
Filing date	Oct 26, 2017
Priority date	Oct 26, 2017
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A package arrangement comprising a structure formed by a plurality of layers including an outer layer formed of a polymer material, one or more interior layers formed of a semi-aromatic polyamide composite material, and an inner layer formed of a polymer material, and an amount of water contained within the structure, the water including an amount of ozone dissolved therein, wherein the interior layer of the structure is configured to absorb oxygen and induce the degradation of the ozone.

First claim

The invention claimed is:

1. A package arrangement comprising:
a structure formed by a plurality of layers including an outer layer formed of a polymer material, one or more interior layers formed of a semi-aromatic polyamide composite material, the semi-aromatic polyamide of at least one of the one or more interior layers comprising an oxidizeable polymer and a catalyst, and an inner layer formed of a polymer material, and
an amount of water contained within the structure, the water including between 0.001 and 0.5 mg/m3 of ozone dissolved therein, and wherein the oxidizeable polymer of the interior layer of the structure absorbs oxygen and induces the degradation of the ozone.

2. The package arrangement of claim 1 , wherein the polymer material of the inner layer is formed of one of a food grade polyolefin and a food grade polyester.

3. The package arrangement of claim 1 , wherein the polymer material of the outer layer is formed of a food grade polyolefin, a food grade polyester, nylon, ethylene vinyl alcohol, or a polyamide based material.

4. The package arrangement of claim 1 , wherein the outer layer and the inner layer are both formed of polyethylene terephthalate.

5. The package arrangement of claim 1 , wherein the plurality of layers further include at least one tie layer between any two of the plurality of layers.

6. The package arrangement of claim 5 , wherein the at least one tie layer includes a first tie material between the inner layer and the interior layer and a second tie material between the interior layer and the outer layer.

7. The package arrangement of claim 1 , wherein the outer layer and the inner layer are each independently formed of one of polyethylene and polypropylene.

8. The package arrangement of claim 6 , wherein the plurality of layers further include a second interior layer between the interior layer and the second tie material, the second interior layer being formed of an ethylene vinyl alcohol material.

9. The package arrangement of claim 8 , wherein the plurality of layers further include a third interior layer between the second interior layer and the second tie material, the third interior layer being formed of a polyamide material.

10. The package arrangement of claim 9 , wherein the outer layer and the inner layer are each independently formed of one of polyethylene and polypropylene.

11. The package arrangement of claim 6 , wherein the first and second tie material is formed of one of a polyolefin grafted unsaturated polybasic carboxylic acid, a polyolefin grafted unsaturated polybasic anhydride, and an olefin and alkyl ester copolymer.

12. The package arrangement of claim 11 , wherein the first and second tie material is formed of a polyolefin grafted unsaturated polybasic anhydride, the polyolefin grafted unsaturated polybasic anhydride being linear low density polyethylene grafted maleic anhydride.

13. The package arrangement of claim 1 , wherein the structure is a bottle.

14. The package arrangement of claim 1 , wherein the structure is one of a film and a bag.

15. The package arrangement of claim 1 , wherein the oxidizeable polymer comprises a blend of a crystalline polymer and an amorphous polymer, the amorphous polymer semicrystalline and oxidizable.

16. The package arrangement of claim 15 , wherein the semi-aromatic polyamide composite material further comprises an unsaturated ethylenic hydrocarbon.

17. The package arrangement of claim 16 , wherein the unsaturated ethylenic hydrocarbon comprises a squalene, a fatty acid, or a polybutadine.

18. The package arrangement of claim 15 , wherein the semi-aromatic polyamide composite material contains a major and a minor component, the major component being 50 wt % or more of the semi-aromatic polyamide composite material and comprising an amorphous nylon formed by one or more semi-aromatic polyamides and/or polyamide 6/66 copolymers, and the minor component being 35 wt % or less of the semi-aromatic polyamide composite material and comprising polyamide 6.

19. The package arrangement of claim 1 , wherein the catalyst is present in an amount less than 5 wt. % of the total weight of the semi-aromatic polyamide composite material.

20. The package arrangement of claim 1 , wherein the catalyst is a transition metal salt.

21. The package arrangement of claim 20 , wherein the transition metal salt is cobalt stearate.

22. The package arrangement of claim 1 , wherein the one or more interior layers formed of a semi-aromatic polyamide composite material is a flexural film formed by casting, blown or biaxial orientation processes.

Assignees

• Advansix Resins & Chemicals Llc

Inventors

• Chen Haiming
• Wang Min

Classifications

• B32B2307/732

  Dimensional properties · CPC title

• B65D81/266

  for absorbing gases, e.g. oxygen absorbers or desiccants (B65D51/244, B65D51/30 take precedence) · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title

• B32B2307/412

  Transparent · CPC title

• B65D81/28 Primary

  Applications of food preservatives, fungicides, pesticides or animal repellants · CPC title