LAMINATE, MANUFACTURING METHOD AND SHAPED CONTAINER

• US 20140017430A1
• Filed: 09/18/2013
• Published: 01/16/2014
• Est. Priority Date: 03/18/2011
• Status: Active Grant

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: SHIMIZU, Kosuke, KIMURA, Mitsuharu, OOMORI, Yumiko
• Granted Patent: US 9,950,846 B2
• Time in Patent Office: Days
• US Class Current: 428/36.4
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B65D 65/40 Applications of laminates for particular packaging purposes B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or
• CPC Class Codes: B65D 65/42 Applications of coated or impregnated materials
• CPC Class Codes: C08J 2323/12 Polypropene
• 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 7/042 with two or more layers, where at least one layer of a composition contains a polymer binder
• CPC Class Codes: C08J 7/0423 with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• 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: C09D 1/00 Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
• CPC Class Codes: Y10T 428/1372 Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/249924 Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
• CPC Class Codes: Y10T 428/3179 Next to cellulosic
• CPC Class Codes: Y10T 428/31978 Cellulosic next to another cellulosic

Abstract

Provided is a laminate having at least a base material and a fine cellulose layer which includes fine cellulose having a carboxyl group, the laminate characterized in being obtained by laminating two or more of the fine cellulose layer. Also provided is a method for manufacturing a laminate, comprising the steps of (1) coating the base material with a liquid dispersion that includes fine cellulose having a carboxyl group, (2) forming a fine cellulose layer by drying the liquid dispersion used for coating, and (3) laminating fine cellulose layers by repeating steps (1) and (2).

Claims

1. A laminate, wherein by comprising:

at least a base material; and

two or more fine cellulose layers which contain fine celluloses having carboxyl groups, wherein,

the two or more fine cellulose layers are stacked.

2. The laminate according to claim 1, wherein:

carboxyl groups are introduced on crystalline surfaces of the fine celluloses; and

the carboxyl concentration of the fine celluloses is 0.1 mmol/g or more, and 3.0 mmol/g or less.

3. The laminate according to claim 2, wherein:

a number average fiber width of the fine celluloses is 1 nm or more, and 50 nm or less; and

a number average fiber length of the fine celluloses is from not less than 100 to not larger than 10000 times the number average fiber width.

4. The laminate according to claim 3, wherein

any one of the fine cellulose layers contains an inorganic lamellar mineral.

5. The laminate according to claim 4, wherein

a part of the laminate, which is on at least one of surfaces of the base material, includes the fine cellulose layer, and furthermore a thin film layer consisting of metal or metal oxide.

6. The laminate according to claim 5, wherein

a part of the laminate, which is on at least one of surfaces of the base material, includes the fine cellulose layer, and furthermore a resin layer or a sealant layer.

7. The laminate according to claim 6, wherein

a thickness of the two or more stacked fine cellulose layers is 10 nm or more, and 10 μ

m or less.

8. The laminate according to claim 7, wherein

the base material is any one of polyesters, polyolefins, celluloses, polyamides, acryls, polystyrenes, polycarbonates, polyvinyl chlorides, polyurethanes, polyvinyl alcohols, paper, or derivatives or composites thereof.

9. A shaped container wherein the laminate according to claim 8 being used.

10. The laminate according to claim 1, wherein

the base material has a pair of main surfaces on both sides;

and

a first layers assembly and a second layers assembly are disposed on the main surfaces, each of the first and second layers assemblies includes a stack of the two or more fine cellulose layers.

11. A method for manufacturing a laminate, wherein by comprising:

the step (1) for coating with dispersed liquid which contains fine celluloses having carboxyl groups;

the step (2) for drying the applied dispersed liquid to form a fine cellulose layer; and

the step (3) for repeating the steps (1) and (2) to stack the fine cellulose layers.