GB514944A - Improvements in expanded rubber - Google Patents
Improvements in expanded rubberInfo
- Publication number
- GB514944A GB514944A GB1189538A GB1189538A GB514944A GB 514944 A GB514944 A GB 514944A GB 1189538 A GB1189538 A GB 1189538A GB 1189538 A GB1189538 A GB 1189538A GB 514944 A GB514944 A GB 514944A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rubber
- dough
- gas
- vulcanization
- chamber
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3442—Mixing, kneading or conveying the foamable material
- B29C44/3446—Feeding the blowing agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
514,944. Gas-expanded rubber. EXPANDED RUBBER CO., Ltd. (Rubatex Products, Inc.). April 20, 1938, No..11895. [Class 70] A condensed gas, such as solid or liquid carbon dioxide, is heated and vaporised within a sealed chamber containing rubber dough, consisting of natural or synthetic rubber, fillers and sulphur, or in a chamber communicating with a closed chamber containing the dough. When the rubber has been partially vulcanized, the excess gas pressure is released. The temperature is then raised to vulcanization temperature and maintained thereat until vulcanization is complete, or the rubber may'be cooled, removed from the gassing chamber and the expansion and vulcanization completed. An inert gas, such as nitrogen, may be introduced in addition to the carbon dioxide in order to prevent the collapse of the rubber due to diffusion on releasing the pressure. Oxygen is removed from the chamber before introducing the rubber dough, either by evacuation or by replacement by an inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1189538A GB514944A (en) | 1938-04-20 | 1938-04-20 | Improvements in expanded rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1189538A GB514944A (en) | 1938-04-20 | 1938-04-20 | Improvements in expanded rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB514944A true GB514944A (en) | 1939-11-22 |
Family
ID=9994620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1189538A Expired GB514944A (en) | 1938-04-20 | 1938-04-20 | Improvements in expanded rubber |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB514944A (en) |
-
1938
- 1938-04-20 GB GB1189538A patent/GB514944A/en not_active Expired
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