ES396145A1 - Dispersion of materials in thermoplastics - Google Patents
Dispersion of materials in thermoplasticsInfo
- Publication number
- ES396145A1 ES396145A1 ES396145A ES396145A ES396145A1 ES 396145 A1 ES396145 A1 ES 396145A1 ES 396145 A ES396145 A ES 396145A ES 396145 A ES396145 A ES 396145A ES 396145 A1 ES396145 A1 ES 396145A1
- Authority
- ES
- Spain
- Prior art keywords
- thermoplastic
- pressure
- temperature
- weight
- blowing agent
- 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
- C08J9/14—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 organic
-
- 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
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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Method and apparatus for the production of a foamed thermoplastic polymer material, characterized in that it comprises extruding the thermoplastic in the molten state, having dissolved in it a system of expansion agents using a screw extruder from a zone of high internal pressure to a zone of lower pressure, in which the blowing agent comprises from 20% to 75% by weight, based on the weight of the thermoplastic, of a first blowing agent that is completely miscible with the molten thermoplastic at said high pressure and than at said pressure high has a boiling pinito higher than the temperature at which the thermoplastic is extruded and a boiling point at said lower pressure lower than the temperature at which the thermoplastic exits to the referred low pressure zone, and a second expansion agent in an amount of up to 10% by weight of the thermoplastic, said second expansion agent having a solubility of at least 0.01% by weight in the mixture of the thermoplastic and the first blowing agent under the conditions of temperature and pressure at which the thermoplastic is extruded and a critical temperature lower than the temperature at which the thermoplastic is extruded, being said second expansion agent introduced into the molten thermoplastic in the extruder from a constant pressure supply source through a flow restriction device in which a pressure drop of at least 7.04 kg/cm2 occurs, in So much so that the first blowing agent is measured and introduced as a liquid. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4944772A GB1317162A (en) | 1969-07-30 | 1970-10-19 | Material tester and search unit therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES396145A1 true ES396145A1 (en) | 1975-02-16 |
Family
ID=10452374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES396145A Expired ES396145A1 (en) | 1970-10-19 | 1971-10-19 | Dispersion of materials in thermoplastics |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5513894B1 (en) |
| BE (1) | BE774164A (en) |
| CA (1) | CA963215A (en) |
| ES (1) | ES396145A1 (en) |
| FR (1) | FR2111694B1 (en) |
| GB (1) | GB1328362A (en) |
| NL (1) | NL7114343A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1092311A (en) * | 1975-09-04 | 1980-12-30 | John C. Miller | Extrusion of cellular thermoplastic material |
| FI771008A (en) * | 1976-05-10 | 1977-11-11 | Berstorff Gmbh Masch Hermann | |
| JPS5781680U (en) * | 1980-11-05 | 1982-05-20 | ||
| JPH0762090B2 (en) * | 1989-04-24 | 1995-07-05 | ビルヘルム フュッツェン，ハンス | Urethane foam material containing no halogenated hydrocarbon and method for producing the same |
| TR26440A (en) * | 1989-10-09 | 1995-03-15 | Hans Wilhelm Huetzen | HALOGEN HYDRO CARBONS THAT DO NOT CONTAIN POLYURETHANE FOAM MATERIAL AND A PROCESS FOR THE PRODUCTION OF IT |
-
1970
- 1970-10-19 GB GB1328362D patent/GB1328362A/en not_active Expired
-
1971
- 1971-10-12 CA CA124,956A patent/CA963215A/en not_active Expired
- 1971-10-18 FR FR7137296A patent/FR2111694B1/fr not_active Expired
- 1971-10-19 JP JP8219071A patent/JPS5513894B1/ja active Pending
- 1971-10-19 BE BE774164A patent/BE774164A/en unknown
- 1971-10-19 ES ES396145A patent/ES396145A1/en not_active Expired
- 1971-10-19 NL NL7114343A patent/NL7114343A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CA963215A (en) | 1975-02-25 |
| BE774164A (en) | 1972-04-19 |
| JPS5513894B1 (en) | 1980-04-12 |
| FR2111694B1 (en) | 1975-07-18 |
| FR2111694A1 (en) | 1972-06-09 |
| DE2152018A1 (en) | 1972-05-18 |
| NL7114343A (en) | 1972-04-21 |
| DE2152018B2 (en) | 1975-11-06 |
| AU3475771A (en) | 1973-05-03 |
| GB1328362A (en) | 1973-08-30 |
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