GB538024A - Improvements in the production of films and like sheet materials - Google Patents
Improvements in the production of films and like sheet materialsInfo
- Publication number
- GB538024A GB538024A GB92340A GB92340A GB538024A GB 538024 A GB538024 A GB 538024A GB 92340 A GB92340 A GB 92340A GB 92340 A GB92340 A GB 92340A GB 538024 A GB538024 A GB 538024A
- Authority
- GB
- United Kingdom
- Prior art keywords
- soap
- sheet
- film
- metal
- ether
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Detergent Compositions (AREA)
Abstract
538,024. Films. HAWTIN, P. R., and GARDNER, C. Jan. 16, 1940, No. 923. [Class 2 (ii)] A solution of a transparent organic filmforming substance in a volatile organic liquid is deposited on a surface of a water-soluble substance containing an aliphatic hydrophobe group of at least 12 carbon atoms and when a sheet has been formed by evaporation of solvent, the sheet is stripped from the surface. The water-soluble substance may be soap or soaplike substance. A block of hard soap or a thin layer of soft soap on a supporting plate or band of glass or metal may be used. The soap may be sodium palmitate or stearate. Other alkali metal salts of long-chain fatty acids may be used as may the corresponding salts of nitrogenous bases, e.g. ammonia and the alkylolamines. Triethanolamine stearate, palmitate, or oleate may be used. Sodium, potassium, ammonium, alkylamine and alkylolamine salts of cetyl naphthalene sulphonic acid, of sulphonated octyl, cetyl, lauryl, and oleyl alcohols, of sulphonated esters of higher alcohols such as the dihexyl and dioctyl esters of succinic acid, and of sulphated higher fatty alcohols, fatty acid amides, and fatty acid esters may be used. Partial esters of ether-alcohols containing at least two hydroxy groups with soap forming acids, e.g. mono-stearates and palmitates of diethylene glycol and triethylene glycol may be used. To avoid premature stripping there may be provided around the surface of soap a surface, e.g. of untreated glass or metal, to which the sheet material readily adheres. Thick sheets may be built up by application of several successive layers of solution. The film-forming substance may be cellulose acetate, propionate, butyrate, aceto-propionate, or other ester or mixed ester, or benzyl cellulose or other ether, mixed ether, or ether-ester. It may be a polymerized unsaturated compound such as polyvinyl alcohol, polyvinyl acetate, or other polyvinyl ester, or polymethyl methacrylate, or polystyrene. The film-forming composition may be applied to the soap surface by pouring, brushing, or spraying. The composition may contain plasticizers including those with fireretardant properties, e.g. trichloro-ethyl phosphate. In an example, a film-casting surface is produced by coating a glass plate having a flat highly polished surface with a solution of triethanolamine oleate in ethanol, drying, and polishing. A margin of uncoated glass is left around the coating and the edges of the plate are provided with detachable metal sides. In another example, molten diethylene glycol mono stearate is poured into a metal tray with detachable sides. Each side has a lower vertical portion, a horizontal portion, and an upper vertical portion. Sufficient of the molten material is poured in so that on cooling the upper surface of the block so formed is flush with the horizontal portions of the metal sides. Film-forming solution is applied and the sheet is stripped from the block by removing the side pieces. The sheet is then trimmed by cutting off the marginal portions adherent to the side pieces. Any soap or like material adhering to the stripped film or sheet may be removed by washing with water or with soap solutions of progressively decreasing concentration and finally with water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB92340A GB538024A (en) | 1940-01-16 | 1940-01-16 | Improvements in the production of films and like sheet materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB92340A GB538024A (en) | 1940-01-16 | 1940-01-16 | Improvements in the production of films and like sheet materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB538024A true GB538024A (en) | 1941-07-17 |
Family
ID=9712888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB92340A Expired GB538024A (en) | 1940-01-16 | 1940-01-16 | Improvements in the production of films and like sheet materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB538024A (en) |
-
1940
- 1940-01-16 GB GB92340A patent/GB538024A/en not_active Expired
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