# US 8,785,700 B2 · Alcohol concentration method

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- Number: US 8,785,700 B2
- Document ID: US8785700B2
- Status: Granted
- Kind: B2
- Application number: 13/984,371
- Filed: 2012-02-10
- Published: 2013-12-26
- Granted: 2014-07-22
- Earliest claimed: 2011-02-11
- Assignees: Nissin Foods Holdings Co., Ltd.
- Applicants: Kunio Yamauchi
- Inventors: Kunio Yamauchi
- Web page: https://patentgrep.com/patent/US8785700B2

## CPC

- C07C 29/76: by physical treatment
- B29C 48/0021: {combined with joining, lining or laminating}
- B29C 48/154: Coating solid articles, i.e. non-hollow articles
- B32B 5/022: {Non-woven fabric}
- B32B 27/10: of paper or cardboard
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/36: comprising polyesters
- C07C 29/74: Separation; Purification; Use of additives, e.g. for stabilisation
- C07C 31/02: Monohydroxylic acyclic alcohols
- C07C 31/04: Methanol
- C07C 31/08: Ethanol
- B29C 48/08: flexible, e.g. films
- B29K 2067/003: {PET, i.e. poylethylene terephthalate}
- B32B 2307/31: Heat sealable
- B32B 2307/724: Permeability to gases, adsorption
- Y10T 428/249991: Synthetic resin or natural rubbers
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention relates to an alcohol concentration method which comprises sealing in an alcohol aqueous solution by a laminate formed by extrusion lamination of polyethylene terephthalate onto at least one surface of an air permeable film-shaped substrate; and storing the alcohol aqueous solution in the laminate for a predetermined period of time, whereby the alcohol in the alcohol aqueous solution can be concentrated easily and conveniently.

## Claims

### Claim 1

An alcohol concentration method, including following steps of:
sealing in an alcohol-containing aqueous solution by a laminate formed by extrusion lamination of polyethylene terephthalate onto at least one surface of an air permeable film-shaped substrate; and
storing the alcohol-containing aqueous solution in the laminate for a predetermined period of time.

### Claim 2 (depends on 1)

The alcohol concentration method according to claim 1, wherein the polyethylene terephthalate is homopolyethylene terephthalate.

### Claim 3 (depends on 1)

The alcohol concentration method according to claim 1, wherein the laminated surface in the laminate formed by extrusion lamination of the polyethylene terephthalate is heat sealable.

### Claim 4 (depends on 1)

The alcohol concentration method according to claim 1, wherein the substrate is paper or a nonwoven fabric.

### Claim 5 (depends on 1)

The alcohol concentration method according to claim 1, wherein an inherent viscosity of the polyethylene terephthalate is 0.72 to 0.88 dL/g.

### Claim 6 (depends on 1)

The alcohol concentration method according to claim 1, wherein the extrusion lamination is performed by a laminating method which comprises extruding molten polyethylene terephthalate through a die for lamination, wherein an air gap ranging from an opening of the die to the supporting substrate is 25 cm or less.