IE800185L - Pre-expanding thermoplastic resin. - Google Patents
Pre-expanding thermoplastic resin.Info
- Publication number
- IE800185L IE800185L IE800185A IE18580A IE800185L IE 800185 L IE800185 L IE 800185L IE 800185 A IE800185 A IE 800185A IE 18580 A IE18580 A IE 18580A IE 800185 L IE800185 L IE 800185L
- Authority
- IE
- Ireland
- Prior art keywords
- beads
- blowing agent
- atmospheric pressure
- expanded
- chamber
- Prior art date
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
-
- 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
- B29C44/3461—Making or treating expandable particles
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Molding Of Porous Articles (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Thermoplastic resin beads containing a blowing agent are continually agitated in a heated pre-expansion chamber to a temperature near the fusion point of the beads and above the boiling point of the blowing agent at substantially atmospheric pressure; the beads soften and expand; a dry gaseous medium may be swept over the beads to remove moisture and any blowing agent which has escaped. Thereafter the chamber is evacuated until a substantial amount of blowing agent is removed from the beads and the expanded beads are then allowed to return to atmospheric pressure. As a preferred embodiment of the invention, steam may be injected into the chamber prior to evacuation. This serves to further expand the beads, and facilitates the removal of the blowing agent. This embodiment also provides a means of manufacturing particularly stable low- density foam. The expanded beads, after they are restored to atmospheric pressure are discharged to a storage facility and maintained at an elevated temperature for immediate use in a molding apparatus. The expanded hot beads may be fed directly by air injection conveyors to mold cavities and molded into the desired articles. Apparatus comprising heating, mould and transfer means is disclosed and illustrated.
[GB2055380A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/059,392 US4272469A (en) | 1979-02-26 | 1979-07-20 | Method and apparatus for forming expanded foam articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IE800185L true IE800185L (en) | 1981-01-20 |
Family
ID=22022653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE800185A IE800185L (en) | 1979-07-20 | 1980-01-31 | Pre-expanding thermoplastic resin. |
Country Status (21)
| Country | Link |
|---|---|
| JP (1) | JPS5617231A (en) |
| KR (1) | KR840000070B1 (en) |
| AU (1) | AU536212B2 (en) |
| BE (1) | BE884378A (en) |
| BR (1) | BR8000985A (en) |
| CA (1) | CA1130968A (en) |
| DE (1) | DE3011519A1 (en) |
| DK (1) | DK219480A (en) |
| ES (1) | ES490656A0 (en) |
| FI (1) | FI801390A (en) |
| FR (1) | FR2461732A1 (en) |
| GB (1) | GB2055380B (en) |
| IE (1) | IE800185L (en) |
| IL (1) | IL59308A0 (en) |
| IT (1) | IT1132060B (en) |
| LU (1) | LU82398A1 (en) |
| NL (1) | NL8004094A (en) |
| NO (1) | NO800518L (en) |
| PT (1) | PT70841A (en) |
| SE (1) | SE8001031L (en) |
| ZA (1) | ZA80451B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS592821A (en) * | 1982-06-30 | 1984-01-09 | Badische Yuka Co Ltd | Manufacture of molding employing prefoaming particle of foaming thermoplastic resin |
| BE900530A (en) * | 1983-09-08 | 1985-03-07 | Kanegafuchi Chemical Ind | PROCESS FOR THE PREPARATION OF PRE-EXPANDED PARTICLES AND APPARATUS FOR IMPLEMENTING SAME. |
| JPS60105503A (en) * | 1983-11-12 | 1985-06-11 | Kanegafuchi Chem Ind Co Ltd | Preforming of thermoplastic resin patticles and apparatus thereof |
| JPS63135436A (en) * | 1986-11-26 | 1988-06-07 | Mitsubishi Yuka Badische Co Ltd | Production of pre-expanded styrene resin particle |
| JPH0739503B2 (en) * | 1987-12-11 | 1995-05-01 | 鐘淵化学工業株式会社 | Pre-expanded polypropylene resin particles and method for producing the same |
| DE68913235T2 (en) * | 1988-06-23 | 1994-07-14 | Casco Nobel Ab | Method and device for producing expandable thermoplastic microspheres. |
| JP5511465B2 (en) * | 2010-03-26 | 2014-06-04 | 積水化成品工業株式会社 | Pre-foaming method for expandable thermoplastic resin particles |
| ES2495640B1 (en) * | 2013-03-14 | 2015-07-07 | Doroteo Olmedo, S.L. | Mold with built-in chamber for the manufacture of plastic foam parts |
| CN109676849B (en) * | 2018-12-24 | 2024-01-09 | 菲尔普(青岛)新材料有限公司 | Plastic foam board molding continuous production line |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3086248A (en) * | 1959-12-07 | 1963-04-23 | Armstrong Cork Co | Process for reducing aging period of cellular products formed with steam |
| US3257103A (en) * | 1962-07-06 | 1966-06-21 | Frederick B Brockhues | Apparatus for processing expandable plastic material |
| US3236927A (en) * | 1962-09-25 | 1966-02-22 | Thompson Ind Co Inc | Method of molding foamable plastic materials |
| US3278658A (en) * | 1963-12-05 | 1966-10-11 | Koppers Co Inc | Process and apparatus for making shaped cellular articles from expandable thermoplastic resins |
| US3235908A (en) * | 1965-06-24 | 1966-02-22 | Rexall Drug Chemical | Molding apparatus |
| US4032609A (en) * | 1972-09-11 | 1977-06-28 | Foster Grant Co., Inc. | Method for pre-expanding and molding expandable thermoplastic polymer particles |
-
1980
- 1980-01-25 ZA ZA00800451A patent/ZA80451B/en unknown
- 1980-01-25 GB GB8002566A patent/GB2055380B/en not_active Expired
- 1980-01-31 IE IE800185A patent/IE800185L/en unknown
- 1980-02-04 IL IL59308A patent/IL59308A0/en unknown
- 1980-02-07 AU AU55328/80A patent/AU536212B2/en not_active Ceased
- 1980-02-08 SE SE8001031A patent/SE8001031L/en not_active Application Discontinuation
- 1980-02-15 BR BR8000985A patent/BR8000985A/en unknown
- 1980-02-15 PT PT70841A patent/PT70841A/en unknown
- 1980-02-23 KR KR1019800000747A patent/KR840000070B1/en active
- 1980-02-25 NO NO800518A patent/NO800518L/en unknown
- 1980-03-24 JP JP3735280A patent/JPS5617231A/en active Pending
- 1980-03-25 DE DE19803011519 patent/DE3011519A1/en not_active Ceased
- 1980-04-08 CA CA349,273A patent/CA1130968A/en not_active Expired
- 1980-04-17 ES ES490656A patent/ES490656A0/en active Granted
- 1980-04-25 LU LU82398A patent/LU82398A1/en unknown
- 1980-04-29 FI FI801390A patent/FI801390A/en not_active Application Discontinuation
- 1980-04-30 FR FR8009903A patent/FR2461732A1/en not_active Withdrawn
- 1980-05-20 DK DK219480A patent/DK219480A/en not_active Application Discontinuation
- 1980-05-27 IT IT22342/80A patent/IT1132060B/en active
- 1980-07-16 NL NL8004094A patent/NL8004094A/en not_active Application Discontinuation
- 1980-07-18 BE BE0/201451A patent/BE884378A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU5532880A (en) | 1981-01-22 |
| FR2461732A1 (en) | 1981-02-06 |
| IT8022342A0 (en) | 1980-05-27 |
| NL8004094A (en) | 1981-01-22 |
| KR840000070B1 (en) | 1984-02-08 |
| FI801390A (en) | 1981-01-21 |
| IL59308A0 (en) | 1980-05-30 |
| BR8000985A (en) | 1981-03-31 |
| AU536212B2 (en) | 1984-04-19 |
| GB2055380B (en) | 1983-09-21 |
| CA1130968A (en) | 1982-09-07 |
| SE8001031L (en) | 1981-01-21 |
| ZA80451B (en) | 1981-01-28 |
| BE884378A (en) | 1981-01-19 |
| ES8102890A1 (en) | 1981-02-16 |
| KR830001991A (en) | 1983-05-21 |
| ES490656A0 (en) | 1981-02-16 |
| JPS5617231A (en) | 1981-02-19 |
| LU82398A1 (en) | 1980-07-31 |
| IT1132060B (en) | 1986-06-25 |
| DK219480A (en) | 1981-01-21 |
| PT70841A (en) | 1980-03-01 |
| DE3011519A1 (en) | 1981-01-22 |
| NO800518L (en) | 1981-01-21 |
| GB2055380A (en) | 1981-03-04 |
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