GB701066A - Production of closed cell cellular bodies from thermo-plastic masses - Google Patents
Production of closed cell cellular bodies from thermo-plastic massesInfo
- Publication number
- GB701066A GB701066A GB28174/51A GB2817451A GB701066A GB 701066 A GB701066 A GB 701066A GB 28174/51 A GB28174/51 A GB 28174/51A GB 2817451 A GB2817451 A GB 2817451A GB 701066 A GB701066 A GB 701066A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- mould
- mass
- inert gas
- partly filled
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Closed - cell cellular thermoplastic masses of e.g. polyvinyl chloride, polystyrene or cellulose acetate are made by dissolving gases in the hot mass under high pressure in a closed mould, heating the mass until it gelatinizes, reducing the pressure whilst preventing escape of material to obtain a 1/5 to 2/5 increase in volume, then cooling the mass and finally completely relieving the pressure. Final expansion of the mass is obtained by reheating without pressure. The gas may be forced into the powdered thermoplastic material or a blowing agent such as azoisobutyric dinitrile may be incorporated in it. The material may be confined in hermetically sealed mould having a movable upper die, the mould being placed between the heated platens of a hydraulic press. The die is raised to obtain the desired expansion. Alternatively, a rigid mould or autoclave partly filled with the thermoplastic material and partly filled with an inert gas, such as nitrogen, under pressure, is used. Pressure is relieved to produce the desired expansion by allowing some of the inert gas to escape. Specification 527,951 and 578,513 are referred to.ALSO:Closed cell cellular thermoplastic masses of, e.g. polyvinyl chloride, polystyrene or cellulose acetate, are made by dissolving gases in the hot mass under high pressure in a closed mould, heating the mass until it gelatinizes, reducing the pressure whilst preventing escape of material to obtain a 1/5 to 2/5 increase in volume, then cooling the mass and finally completely relieving the pressure. Final expansion of the mass is obtained by reheating without pressure. The gas may be forced into the powdered thermoplastic material or a blowing agent such as azoisobutyric dinitrile may be incorporated in it. The material may be confined in a hermetically sealed mould having a movable upper die, the mould being placed between the heated platens of a hydraulic press. The die is raised to obtain the desired expansion. Alternatively, a rigid mould or autoclave partly filled with the thermoplastic material and partly filled with an inert gas, such as nitrogen, under pressure is used. Pressure is relieved to produce the desired expansion by allowing some of the inert gas to escape. Specifications 527,951 and 578,513 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH701066X | 1950-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB701066A true GB701066A (en) | 1953-12-16 |
Family
ID=4530027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28174/51A Expired GB701066A (en) | 1950-12-05 | 1951-11-30 | Production of closed cell cellular bodies from thermo-plastic masses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB701066A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3160689A (en) * | 1960-05-24 | 1964-12-08 | Lonza Electric & Chem Works | Method of forming shaped cellular bodies |
| NL1040475C2 (en) * | 2013-10-29 | 2015-04-30 | Fits Holding B V | Method and device for manufacturing a sandwich structure comprising a thermoplastic foam layer. |
-
1951
- 1951-11-30 GB GB28174/51A patent/GB701066A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3160689A (en) * | 1960-05-24 | 1964-12-08 | Lonza Electric & Chem Works | Method of forming shaped cellular bodies |
| NL1040475C2 (en) * | 2013-10-29 | 2015-04-30 | Fits Holding B V | Method and device for manufacturing a sandwich structure comprising a thermoplastic foam layer. |
| WO2015065175A1 (en) | 2013-10-29 | 2015-05-07 | Fits Holding B.V. | Method and device for manufacturing a sandwich structure comprising a thermoplastic foam layer |
| WO2015065176A1 (en) | 2013-10-29 | 2015-05-07 | Fits Holding B.V. | Method and device for manufacturing a thermoplastic sandwich structure comprising a thermoplastic foam layer and fiber-reinforced thermoplastic cover layers |
| EA031976B1 (en) * | 2013-10-29 | 2019-03-29 | Фитс Холдинг Б.В. | Method and device for manufacturing a thermoplastic sandwich structure |
| EA032684B1 (en) * | 2013-10-29 | 2019-07-31 | Фитс Холдинг Б.В. | Method and device for manufacturing a sandwich structure |
| US10471634B2 (en) | 2013-10-29 | 2019-11-12 | Fits Holding B.V. | Method and device for manufacturing a sandwich structure comprising a thermoplastic foam layer |
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