GB953199A - Process for the production of foamed articles by molding foamable or particulated preformed thermoplastic resinous materials - Google Patents
Process for the production of foamed articles by molding foamable or particulated preformed thermoplastic resinous materialsInfo
- Publication number
- GB953199A GB953199A GB43357/60A GB4335760A GB953199A GB 953199 A GB953199 A GB 953199A GB 43357/60 A GB43357/60 A GB 43357/60A GB 4335760 A GB4335760 A GB 4335760A GB 953199 A GB953199 A GB 953199A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- water
- expanded
- thermoplastic resinous
- particulated
- 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
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
- C08J9/232—Forming foamed products by sintering expandable particles
-
- 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
- B29C44/3415—Heating or cooling
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)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Articles of foamable or pre-foamed thermoplastic resinous material may be formed by expanding the material in the presence of water e.g. 10-30% by weight, using dielectric heating, in a resiliently enlargeable or heat shrinkable mould. Suitable materials for use in this process include polymers and co-polymers of styrene, alpha-methyl styrene, vinyl toluenes, aryl mono-and di-chlorostyrenes, and aryl-dimethyl styrenes, methyl methacrylate, ethyl acrylate, vinyl acetate and butyral, ethylene, and cellulose acetate and nitrate. The material is preferably expanded in a rubber-like resilient mould which exerts a constant restraint on the material. The material may be wetted before or after filling the mould, which may also be wetted, and to aid the wetting the water may contain a surfactant e.g. a detergent. The temperature of the process may be increased above the boiling point of water by addition of alcohols or glycols, or by the use of vents in the mould which allow a certain pressure to build up before allowing escape of gas. Where non-expanded material is used a blowing agent, e.g. dichloro-, difluoro-methane, alkali metal carbonate or pentane, must be mixed with the material before wetting, and in cases where granular, pre-expanded material is used the moulding is best carried out in a mould which contracts on heating e.g. an envelope of polymerized vinylidene chloride.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB43357/60A GB953199A (en) | 1960-12-16 | 1960-12-16 | Process for the production of foamed articles by molding foamable or particulated preformed thermoplastic resinous materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB43357/60A GB953199A (en) | 1960-12-16 | 1960-12-16 | Process for the production of foamed articles by molding foamable or particulated preformed thermoplastic resinous materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB953199A true GB953199A (en) | 1964-03-25 |
Family
ID=10428415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB43357/60A Expired GB953199A (en) | 1960-12-16 | 1960-12-16 | Process for the production of foamed articles by molding foamable or particulated preformed thermoplastic resinous materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB953199A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2602379A1 (en) * | 1975-01-24 | 1976-07-29 | Isobox Barbier Sa | PROCESS FOR MANUFACTURING ARTICLES FROM FOAM PLASTIC |
US4173608A (en) * | 1976-10-22 | 1979-11-06 | Isobox-Barbier | Process and apparatus for the manufacture of expanded plastics materials |
-
1960
- 1960-12-16 GB GB43357/60A patent/GB953199A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2602379A1 (en) * | 1975-01-24 | 1976-07-29 | Isobox Barbier Sa | PROCESS FOR MANUFACTURING ARTICLES FROM FOAM PLASTIC |
US4173608A (en) * | 1976-10-22 | 1979-11-06 | Isobox-Barbier | Process and apparatus for the manufacture of expanded plastics materials |
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