GAS BARRIER LAMINATE AND PACKAGING

• US 20130017400A1
• Filed: 03/18/2011
• Published: 01/17/2013
• Est. Priority Date: 03/25/2010
• Status: Abandoned Application

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Oomori, Yumiko, Imai, Kazuko
• Application Number:
  US13/636,847
• Publication Number:
  US 20130017400A1
• Time in Patent Office: Days
• US Class Current: 428/447
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 2401/02 Cellulose; Modified cellulose
• CPC Class Codes: C08J 2429/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• 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: C08J 7/052 Forming heat-sealable coatings
• CPC Class Codes: C08K 2201/008 Additives improving gas barrier properties
• CPC Class Codes: C08K 2201/012 Additives improving oxygen scavenging properties
• CPC Class Codes: C08K 3/16 Halogen-containing compounds
• CPC Class Codes: C08K 5/3435 Piperidines
• CPC Class Codes: C08K 5/5419 containing at least one Si—C bond
• CPC Class Codes: C08L 1/02 Cellulose; Modified cellulose
• CPC Class Codes: C08L 2205/16 Fibres; Fibrils
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31971 : Of carbohydrate

Abstract

A gas barrier laminate is provided that can maintain excellent gas barrier properties of a cellulose film even under high humidity and that can suppress entry or permeation of water vapor or dirt, which cause deterioration, into the film. The gas barrier laminate includes a base material, and a gas barrier layer provided on at least one side of the base material. The gas barrier layer contains at least cellulose fibers and one or more kinds of water-soluble polymer. Additionally, the fiber width of the cellulose fibers falls within a range of 3 nm to 50 nm.

Claims

1. A gas barrier laminate comprising:

a base material; and

a gas barrier layer provided on at least one side of the base material,

wherein the gas barrier layer contains at least cellulose fibers and one or more kinds of water-soluble polymer.

2. The gas barrier laminate according to claim 1,

wherein the fiber width of the cellulose fibers falls within a range of 3 nm to 50 nm.

3. The gas barrier laminate according to claim 2,

wherein the weight ratio ((A)/(B)) of the cellulose fibers (A) and the water-soluble polymer (B) falls within a range of 5/95 to 95/5.

4. The gas barrier laminate according to claim 3,

wherein at least one kind of water-soluble polymer is polyvinyl alcohol.

5. The gas barrier laminate according to claim 4,

wherein the weight ratio ((A)/(B)) of the cellulose fibers (A) and the polyvinyl alcohol (B) falls within a range of 50/50 to 95/5.

6. The gas barrier laminate according to claim 3,

wherein at least one kind of the water-soluble polymer is polyuronic acid.

7. The gas barrier laminate according to claim 6,

wherein the weight ratio ((A)/(B)) of the cellulose fibers (A) and the polyuronic acid (B) falls within a range of 20/80 to 95/5.

8. The gas barrier laminate according to claim 5,

wherein the gas barrier layer further contains a layered mineral.

9. The gas barrier laminate according to claim 5,

wherein the gas barrier layer further contains a siloxane compound.

10. A packaging material formed by laminating a heat-sealable thermoplastic resin layer via an adhesive layer on at least one side of the gas barrier laminate according to claim 7.

11. The gas barrier laminate according to claim 7,

wherein the gas barrier layer further contains a layered mineral.

12. The gas barrier laminate according to claim 7,

wherein the gas barrier layer further contains a siloxane compound

13. A packaging material formed by laminating a heat-sealable thermoplastic resin layer via an adhesive layer on at least one side of the gas barrier laminate according to claim 8.