GB635620A - Improved process for the production of extensible contractile tubular, annular or the like film products, for example, caps or rings for stoppering bottles - Google Patents
Improved process for the production of extensible contractile tubular, annular or the like film products, for example, caps or rings for stoppering bottlesInfo
- Publication number
- GB635620A GB635620A GB6376/47A GB637647A GB635620A GB 635620 A GB635620 A GB 635620A GB 6376/47 A GB6376/47 A GB 6376/47A GB 637647 A GB637647 A GB 637647A GB 635620 A GB635620 A GB 635620A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glycol
- per cent
- solution
- formal
- treatment
- 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
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0096—Producing closure members for containers, e.g. closure caps or stoppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
- B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A process for the production of extensible contractile tubular annular or the like film-products, for example, caps or rings for stoppering bottles, having a base consisting of cellulose triacetate, comprises forming such products by a wet process from a solution of cellulose triacetate in a mixture consisting of glycol formal and a small proportion of water, and coagulating the shaped products with a mixture consisting of glycol formal and a large proportion of water. Preferably the glycol formal is used in association with plasticizers, e.g. triacetin or glycol diacetate. The maximum glycol formal content of the coagulating bath is about 15 per cent. An aqueous solution of glycol diacetate may be used as an after-treatment. In example 1 cellulose triacetate is dissolved at 40-50 DEG C. in a mixture of glycol formal with a little water, methyl glycol phthalate and " Plastomoll " (Registered Trade Mark), dye stuffs, fillers and the like being added, if required. Formers are dipped into this solution, drained off, and immersed at 20 DEG C., in a coagulating bath of a 14 per cent aqueous solution of glycol formal. They are then dipped in an after treatment bath consisting of a 12 per cent solution of glycol diacetate at room temperature. In example 2 glycol diacetate is added to the initial solution and the coagulation bath consists of an aqueous mixture containing 10 per cent of glycol formal and 12 per cent of glycol diacetate, thus dispensing with the after treatment. The after treatment in the first example and the coagulation in the second example may be carried out continuously. Specification 587,309 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR635620X | 1944-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB635620A true GB635620A (en) | 1950-04-12 |
Family
ID=8994369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6376/47A Expired GB635620A (en) | 1944-11-08 | 1947-03-06 | Improved process for the production of extensible contractile tubular, annular or the like film products, for example, caps or rings for stoppering bottles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB635620A (en) |
-
1947
- 1947-03-06 GB GB6376/47A patent/GB635620A/en not_active Expired
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