GB1502536A - Process for preparing film by wet method - Google Patents
Process for preparing film by wet methodInfo
- Publication number
- GB1502536A GB1502536A GB28219/76A GB2821976A GB1502536A GB 1502536 A GB1502536 A GB 1502536A GB 28219/76 A GB28219/76 A GB 28219/76A GB 2821976 A GB2821976 A GB 2821976A GB 1502536 A GB1502536 A GB 1502536A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid phase
- water
- hydrazine hydrate
- starting solution
- solution
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0016—Coagulation
- B01D67/00165—Composition of the coagulation baths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
- B01D2325/022—Asymmetric membranes
- B01D2325/0231—Dense layers being placed on the outer side of the cross-section
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
1502536 Asymmetric membranes IDEMITSU KOSAN CO Ltd 7 July 1976 [31 July 1975] 28219/76 Heading B5B Films of asymmetric cross-sectional structure are formed by feeding a starting solution for the film to an interface area of two liquid phases in a coagulation bath, the two liquid phases being immiscible and at least one of the two being capable of causing the film forming solution to gel. In modifications the starting solution may be fed to the lower liquid phase covered with a small amount of the upper liquid phase followed immediately by the remainder of the upper liquid phase or the starting solution may be added to the upper liquid phase wherein the bottom of the bath is covered with the lower liquid phase followed immediately by the remainder of the lower liquid. Polyacrylonitrile in DMSO is fed into the interface of ethyl acetate and water; "Spandex" (Registered Trade Mark) in DMA into p-xylene and hydrazine hydrate; grafted yeast protein and polyurethane copolymer in DMSO into hydrazine hydrate and toluene; cellulose triacetate in methyl acetate into butyl acetate and aqueous isopropanol; polycarbonate in dioxane into water and dichloromethane/isopropanol; styrenerubber block copolymer in THF into p-xylene and water; collagen in acetic acid (0À05% in water) into methyl acetate and 0À5% NaCl solution and polyamide in DMA into methylacetate and hydrazine hydrate. Films formed were stretched and heat set.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50092535A JPS5216572A (en) | 1975-07-31 | 1975-07-31 | Method of producing wet film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1502536A true GB1502536A (en) | 1978-03-01 |
Family
ID=14057048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28219/76A Expired GB1502536A (en) | 1975-07-31 | 1976-07-07 | Process for preparing film by wet method |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5216572A (en) |
| DE (1) | DE2634604C3 (en) |
| FR (1) | FR2319663A1 (en) |
| GB (1) | GB1502536A (en) |
| IT (1) | IT1062644B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3042670A1 (en) * | 1979-11-23 | 1981-10-01 | Neotronics Ltd., Bishops Stortford, Hertfordshire | DEVICE FOR MEASURING THE EFFICIENCY OF A BURNER |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0220742Y2 (en) * | 1981-01-09 | 1990-06-06 | ||
| JPS58175226A (en) * | 1982-04-08 | 1983-10-14 | 株式会社安川電機 | Gas sealed breaker |
| DE3217047A1 (en) * | 1982-05-06 | 1983-11-10 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | MEMBRANES ON THE BASIS OF SILICA ACID THEROPOLYCONDENSATES, METHOD FOR THE PRODUCTION THEREOF AND THEIR USE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5512054B2 (en) * | 1972-09-22 | 1980-03-29 |
-
1975
- 1975-07-31 JP JP50092535A patent/JPS5216572A/en active Granted
-
1976
- 1976-07-07 GB GB28219/76A patent/GB1502536A/en not_active Expired
- 1976-07-27 FR FR7622848A patent/FR2319663A1/en active Granted
- 1976-07-29 IT IT50677/76A patent/IT1062644B/en active
- 1976-07-31 DE DE2634604A patent/DE2634604C3/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3042670A1 (en) * | 1979-11-23 | 1981-10-01 | Neotronics Ltd., Bishops Stortford, Hertfordshire | DEVICE FOR MEASURING THE EFFICIENCY OF A BURNER |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2319663B1 (en) | 1978-05-05 |
| DE2634604A1 (en) | 1977-02-03 |
| DE2634604C3 (en) | 1979-01-25 |
| JPS561345B2 (en) | 1981-01-13 |
| JPS5216572A (en) | 1977-02-07 |
| FR2319663A1 (en) | 1977-02-25 |
| IT1062644B (en) | 1984-10-20 |
| DE2634604B2 (en) | 1978-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |