GB492264A - Improvements in or relating to the production of films of alginic material - Google Patents
Improvements in or relating to the production of films of alginic materialInfo
- Publication number
- GB492264A GB492264A GB741937A GB741937A GB492264A GB 492264 A GB492264 A GB 492264A GB 741937 A GB741937 A GB 741937A GB 741937 A GB741937 A GB 741937A GB 492264 A GB492264 A GB 492264A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- per cent
- alginate
- films
- relating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/04—Alginic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/04—Alginic acid; Derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Transparent films are prepared by extruding a solution of a soluble alginate, which alginate has a viscosity of not less than 10 centipoises at 15 DEG C. in a 1 per cent solution, into a bath of a precipitant containing calcium ions, for example, a calcium chloride solution. In an example, calcium alginate having a viscosity of 250 centipoises is soaked in hydrochloric acid, and the alginic acid dissolved in sodium carbonate solution to give a 7 per cent solution. This solution is extruded through a slot into a 10 per cent solution of calcium chloride, and the film washed and passed through a glycerol bath. Specification 415,042 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB741937A GB492264A (en) | 1937-03-13 | 1937-03-13 | Improvements in or relating to the production of films of alginic material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB741937A GB492264A (en) | 1937-03-13 | 1937-03-13 | Improvements in or relating to the production of films of alginic material |
Publications (1)
Publication Number | Publication Date |
---|---|
GB492264A true GB492264A (en) | 1938-09-13 |
Family
ID=9832757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB741937A Expired GB492264A (en) | 1937-03-13 | 1937-03-13 | Improvements in or relating to the production of films of alginic material |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB492264A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2600504A (en) * | 1947-06-19 | 1952-06-17 | Alginate Ind Ltd | Forming paper from modified calcium alginate fibers |
DE930944C (en) * | 1943-02-19 | 1955-07-28 | Courtaulds Ltd | Process for the production of artificial structures, such as threads, fibers or films, from alginates |
US2802744A (en) * | 1950-12-19 | 1957-08-13 | Weingand Richard | Method of producing synthetic sausage casings |
US2965498A (en) * | 1958-07-16 | 1960-12-20 | American Viscose Corp | Method of reducing the swelling capacity of synthetic alginate skins |
EP0459378A1 (en) * | 1990-05-30 | 1991-12-04 | FIDIA S.p.A. | Gels in the form of highly hydrated self-supporting film, the process for their preparation, and their use in the therapy of cutaneous lesions and/or pathologies |
FR2705965A1 (en) * | 1993-06-04 | 1994-12-09 | Creca Sa | Composition for the manufacture of an essentially biodegradable film and film thus obtained. |
-
1937
- 1937-03-13 GB GB741937A patent/GB492264A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE930944C (en) * | 1943-02-19 | 1955-07-28 | Courtaulds Ltd | Process for the production of artificial structures, such as threads, fibers or films, from alginates |
US2600504A (en) * | 1947-06-19 | 1952-06-17 | Alginate Ind Ltd | Forming paper from modified calcium alginate fibers |
US2802744A (en) * | 1950-12-19 | 1957-08-13 | Weingand Richard | Method of producing synthetic sausage casings |
DE975269C (en) * | 1950-12-19 | 1961-10-26 | Wolff & Co Kommanditgesellscha | Process for achieving the immediate and immediate processability of undried artificial skin consisting of alginic acid or alginates |
US2965498A (en) * | 1958-07-16 | 1960-12-20 | American Viscose Corp | Method of reducing the swelling capacity of synthetic alginate skins |
EP0459378A1 (en) * | 1990-05-30 | 1991-12-04 | FIDIA S.p.A. | Gels in the form of highly hydrated self-supporting film, the process for their preparation, and their use in the therapy of cutaneous lesions and/or pathologies |
US5523093A (en) * | 1990-05-30 | 1996-06-04 | Fidia, S.P.A. | Gels in the form of highly hydrated self-supporting film, the process for their preparation, and their use in the therapy of cutaneous lesions and/or pathologies |
US5618561A (en) * | 1990-05-30 | 1997-04-08 | Fidia S.P.A. | Preparation of highly hydrated self-supporting hyaluronic acid containing films |
US5709877A (en) * | 1990-05-30 | 1998-01-20 | Fidia S.P.A. | Gels in the form of highly hydrated self-supporting film, the process for their preparation, and their use in the therapy of cutaneous lesions and/or pathologies |
FR2705965A1 (en) * | 1993-06-04 | 1994-12-09 | Creca Sa | Composition for the manufacture of an essentially biodegradable film and film thus obtained. |
WO1994029382A1 (en) * | 1993-06-04 | 1994-12-22 | C.R.E.C.A. | Method of manufacture of a biodegradable, hydrophobic and transparent film, and film obtained |
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