GB694964A - Improvements in or relating to the manufacture of cellular bodies - Google Patents
Improvements in or relating to the manufacture of cellular bodiesInfo
- Publication number
- GB694964A GB694964A GB18843/50A GB1884350A GB694964A GB 694964 A GB694964 A GB 694964A GB 18843/50 A GB18843/50 A GB 18843/50A GB 1884350 A GB1884350 A GB 1884350A GB 694964 A GB694964 A GB 694964A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- gas
- ram
- solvents
- introducing
- 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
- C08J9/12—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 by a physical blowing agent
Abstract
Closed cell, cellular bodies are obtained from thermoplastic material by reducing such material to a finely-divided loose compressible state, adding one or more solvents or softening agents, introducing the materials into a mould having a movable ram, introducing gas under pressure, moving the ram into the mould so as to compress and compact the gas and materials, heating to enable the gas to be absorbed, cooling, opening the mould, and then expanding by heat if necessary to produce the cells. The thermoplastic material may be rubber, polyvinyl chloride, polystyrol, or cellulose acetate and the solvents, acetone, ethyl methyl ketone, butyl acetate, cyclohexanone, tetrahydrofuran or benzol. Softening agents may be tricresyl phosphate or dioctyl phthalate. The material may be finely divided by grinding or used in the form of threads, sheets, plates or rods, it being placed in the mould in such a way that the gases can circulate; zinc stearate powder may be added to separate the parts. Small quantities of blowing agents such as azo-iso butyric acid dinitrile or diazoaminobenzene may also be added. In examples (1) and (2), polyvinyl chloride optionally with tricresyl phosphate or dioctyl phthalate is converted to a fine powder with the aid of tetrahydrofuran. The powder is then introduced together with nitrogen gas into a mould fitted with a ram. Pressure and temperature is increased until the gas is completely absorbed after which the mould is cooled and opened. The body after removal is expanded by heat.ALSO:Closed cell, cellular bodies are obtained from thermoplastic material by reducing such material to a finely divided loose compressible state, adding one or more solvents or softening agents, introducing the materials into a mould having a movable ram introducing gas under pressure, moving the ram into the mould so as to compress and compact the gas and materials, heating to enable the gas to be absorbed, cooling, opening the mould, and then expanding by heat if necessary to produce the cells. The thermoplastic material may be natural or synthetic rubber and the solvents acetone, ethyl methyl ketone, butyl acetate, cyclohexanone, tetrahydrofuran or benzol. Softening agents may be tricresyl phosphate or dioctyl phthalate. The material may be finely divided by grinding or used in the form of threads, sheets plates or rods, it being placed in the mould in such a way that the gases can circulate, zinc stearate powder may be added to separate the parts. Small quantities of blowing agents such as azo-iso butyric acid dinitrile or diazoaminobenzene may also be added. In example 3, rubber, zinc oxide, sulphur, diphenylguanidine, paraffin oil, lithopone and dyestuffs are drawn into foils and after dusting with zinc stearate is introduced together with nitrogen gas into a mould fitted with a ram. Pressure and temperature is increased until the gas is completely absorbed after which the mould is cooled and opened. The rubber is expanded at 130 DEG -140 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH694964X | 1949-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB694964A true GB694964A (en) | 1953-07-29 |
Family
ID=4529559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18843/50A Expired GB694964A (en) | 1949-07-27 | 1950-07-27 | Improvements in or relating to the manufacture of cellular bodies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB694964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180072003A1 (en) * | 2016-09-12 | 2018-03-15 | Textron Aviation Inc. | Bonding process and system |
-
1950
- 1950-07-27 GB GB18843/50A patent/GB694964A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180072003A1 (en) * | 2016-09-12 | 2018-03-15 | Textron Aviation Inc. | Bonding process and system |
| US10800112B2 (en) * | 2016-09-12 | 2020-10-13 | Textron Innovations, Inc. | Bonding process and system |
| US11548239B2 (en) | 2016-09-12 | 2023-01-10 | Textron Innovations, Inc. | Bonding process and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3278466A (en) | Thermoplastic cellular polymers with mixed blowing agents | |
| GB729953A (en) | A process of preparing closed-cell, gas-containing bodies | |
| US2769205A (en) | Expanded cellular rubber with elliptical cells and method of making | |
| GB971726A (en) | Porous product and method of manufacturing | |
| GB935183A (en) | Method of making plastic articles | |
| GB971352A (en) | Forming rigid structures of expanded thermoplastic material | |
| GB716388A (en) | Improved process for producing cellular thermo-plastic bodies | |
| GB820906A (en) | Improvements in or relating to mouldable thermoplastic material | |
| GB694964A (en) | Improvements in or relating to the manufacture of cellular bodies | |
| Hunter et al. | Sulfonyl hydrazide blowing agents for rubber and plastics | |
| US3111496A (en) | High temperature blowing of rubber and plastics with alkali metal azodicarboxylate | |
| JPS57191029A (en) | Manufacture of bridged polyolefinic foamed material | |
| GB1044533A (en) | Process and apparatus for the manufacture of cellular materials | |
| GB965177A (en) | Method of reclaiming rubber | |
| GB1248314A (en) | Production of moldings from expandable ethylene polymers | |
| GB727679A (en) | Improvements in the manufacture of micro-porous material | |
| GB829912A (en) | Apparatus and process for making cellular rubber | |
| GB839826A (en) | Method and apparatus for manufacturing hollow articles from thermoplastic material | |
| US2421831A (en) | Single stage production of gas expanded rubber | |
| GB853944A (en) | Improvements relating to the manufacture of cellular bodies from thermoplastic materials | |
| GB737485A (en) | Improvements in or relating to method of making cellular rubber | |
| GB831002A (en) | Preparation of monothiooxamide | |
| GB741133A (en) | An improved gas expanded material and process for preparing the same | |
| ES328529A1 (en) | Process for the production of foam rubber | |
| GB818224A (en) | Expanded thermoplastic materials |