GB595567A - Improvements in or relating to the manufacture of films and foils from polyvinyl resins - Google Patents
Improvements in or relating to the manufacture of films and foils from polyvinyl resinsInfo
- Publication number
- GB595567A GB595567A GB14763/45A GB1476345A GB595567A GB 595567 A GB595567 A GB 595567A GB 14763/45 A GB14763/45 A GB 14763/45A GB 1476345 A GB1476345 A GB 1476345A GB 595567 A GB595567 A GB 595567A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyvinyl
- film
- support
- solvent
- cellulose triacetate
- 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
Landscapes
- Moulding By Coating Moulds (AREA)
Abstract
In the manufacture of flexible films or foils by casting a solution of a polyvinyl resin in a volatile solvent with, if desired, the addition of plasticisers, on to a moving support, the film so formed after the solvent has been evaporated is readily stripped from the support without deformation by applying to the support before the polyvinyl resin film is cast thereon, a film of cellulose triacetate having a thickness not greater than 1/100 mm. The combined polyvinyl resin film and cellulose triacetate film are stripped together from the support. The cellulose triacetate in solution in a volatile solvent or solvent mixture which preferably is of the same nature as that employed for dissolving the polyvinyl resin, may be applied to the support by spreading with a cotton wad or by an atomiser. Specified polyvinyl resins are polyvinyl formaldehyde acetal and polyvinyl butyraldehyde acetal. In an example, a dilute solution of cellulose triacetate in methylene chloride-alcohol is spread on to an endless metallic casting band and the solvent evaporated to leave a cellulose acetate veil of less than 0.01 mm. thickness. A solution of polyvinyl formaldehyde acetal in methylene chloride-alcohol containing ethylparatoluene sulphonamide is then poured on to the coated band, the solvent evaporated and the film so formed is stripped without difficulty. The films may be employed in the manufacture of safety glass and for other purposes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR595567X | 1944-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595567A true GB595567A (en) | 1947-12-09 |
Family
ID=8966934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14763/45A Expired GB595567A (en) | 1944-06-21 | 1945-06-11 | Improvements in or relating to the manufacture of films and foils from polyvinyl resins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595567A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3225128A (en) * | 1958-08-12 | 1965-12-21 | Kurashiki Rayon Co | Method of forming polyvinyl alcohol film |
| US3322870A (en) * | 1965-04-06 | 1967-05-30 | Union Carbide Corp | Method of producing clear, crystalline, high-gloss thermoplastic film |
-
1945
- 1945-06-11 GB GB14763/45A patent/GB595567A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3225128A (en) * | 1958-08-12 | 1965-12-21 | Kurashiki Rayon Co | Method of forming polyvinyl alcohol film |
| US3322870A (en) * | 1965-04-06 | 1967-05-30 | Union Carbide Corp | Method of producing clear, crystalline, high-gloss thermoplastic film |
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