# US 2017/0283568 A1 · Polysaccharide film and method for the production thereof

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- Number: US 2017/0283568 A1
- Document ID: US20170283568A1
- Status: Published application
- Kind: A1
- Application number: 15/604,177
- Filed: 2017-05-24
- Published: 2017-10-05
- Earliest claimed: 2013-04-10
- Assignees: Lenzing Aktiengesellschaft
- Applicants: Lenzing AG
- Inventors: Franz Dürnberger; Andreas Schweigart; Gerold Riedl; Elisabeth Reiter; Gert Kroner
- Web page: https://patentgrep.com/patent/US20170283568A1

## CPC

- C08J 5/18: Manufacture of films or sheets
- B29C 48/08: flexible, e.g. films
- B29K 2005/00: Use of polysaccharides or derivatives as moulding material
- C08J 2305/00: Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- 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)
- 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

## Abstract

The present invention relates to a method for the production of films made of polysaccharides which, as a fiber-forming substance, contain α(1→3)-glucan, as well as to the films made thereof and to their use.

## Claims

### Claim 1

A method for the production of a polysaccharide film, wherein the finished spinning solution for the extrusion comprises an amine oxide, at least 23% by weight of water, related to the total quantity of the spinning solution, and, as a polysaccharide, α(1→3)-glucan.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the amine oxide is N-methylmorpholine-N-oxide.

### Claim 3 (depends on 1)

The method according to claim 1, wherein at least 90% of the α(1→3)-glucan consist of hexose units and at least 50% of the hexose units are linked via α(1→3)-glycosidic bonds.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the extrusion is carried out by means of a straight slot die or an annular slot die.

### Claim 5 (depends on 1)

The method according to in claim 1, wherein the spinning solution is stretched following the extrusion.

### Claim 6

A polysaccharide film comprising a film-forming substance, wherein the film-forming substance consists substantially of α(1→3)-glucan.

### Claim 7

(canceled)

### Claim 8

(canceled)