GB1444191A - Process for extrusion of polyolefins for granulation - Google Patents
Process for extrusion of polyolefins for granulationInfo
- Publication number
- GB1444191A GB1444191A GB932974A GB932974A GB1444191A GB 1444191 A GB1444191 A GB 1444191A GB 932974 A GB932974 A GB 932974A GB 932974 A GB932974 A GB 932974A GB 1444191 A GB1444191 A GB 1444191A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyolefin
- polymer
- screw
- barrel
- extrusion
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Laminated Bodies (AREA)
Abstract
1444191 Regulating output of screw extruders RUHRCHEMIE AG 1 March 1974 [5 March 1973] 9329/74 Heading B5A Polyolefin granules, intended for extrusion into flat, or tubular inflated films, which are orientated by stretching, are produced by cutting strands which are extruded by a single or multiple screw extruder in which the delivery zone of the screw, containing molten polyolefin, is surrounded by a water-cooled barrel which removes heat from the layer of molten polyolefin adjacent the barrel wall, and hence regulates the amount of leakage flow of the polyolefin between the screw flight and the barrel wall to obtain maximum output. The process enables a higher extrusion output to be obtained from the granules corresponding to that at which stretching of the film is facilitated. The polyolefin is delivered into the delivery zone at a temperature of 150‹ to 350‹ C., and preferably 180-220‹ C., and cooling is effected by water circulation channels in the barrel, extending parallel to the screw axis. The polyolefin preferably comprises a homo-polymer or co-polymer, of C 2 -C 5 olefin, and may comprise ethylene homo-polymer, or an ethylene/propylene co-polymer produced by a low pressure process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732310920 DE2310920C3 (en) | 1973-03-05 | Process for the production of granules suitable for processing into films and tapes from low-pressure polyolefins, in particular low-pressure polyethylene copolymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1444191A true GB1444191A (en) | 1976-07-28 |
Family
ID=5873861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB932974A Expired GB1444191A (en) | 1973-03-05 | 1974-03-01 | Process for extrusion of polyolefins for granulation |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS49119944A (en) |
| AT (1) | AT332109B (en) |
| BE (1) | BE811605A (en) |
| BR (1) | BR7401610D0 (en) |
| CA (1) | CA1047721A (en) |
| ES (1) | ES423872A1 (en) |
| FR (1) | FR2220359B1 (en) |
| GB (1) | GB1444191A (en) |
| IT (1) | IT1008351B (en) |
| NL (1) | NL7402279A (en) |
| NO (1) | NO142611C (en) |
| ZA (1) | ZA741261B (en) |
-
1973
- 1973-03-19 AT AT240073A patent/AT332109B/en not_active IP Right Cessation
-
1974
- 1974-02-19 NL NL7402279A patent/NL7402279A/xx unknown
- 1974-02-26 FR FR7406510A patent/FR2220359B1/fr not_active Expired
- 1974-02-26 NO NO740662A patent/NO142611C/en unknown
- 1974-02-26 BE BE141418A patent/BE811605A/en unknown
- 1974-02-26 ZA ZA00741261A patent/ZA741261B/en unknown
- 1974-03-01 GB GB932974A patent/GB1444191A/en not_active Expired
- 1974-03-01 IT IT48886/74A patent/IT1008351B/en active
- 1974-03-04 CA CA193,982A patent/CA1047721A/en not_active Expired
- 1974-03-04 ES ES423872A patent/ES423872A1/en not_active Expired
- 1974-03-05 BR BR1610/74A patent/BR7401610D0/en unknown
- 1974-03-05 JP JP49025620A patent/JPS49119944A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7402279A (en) | 1974-09-09 |
| ATA240073A (en) | 1975-12-15 |
| ZA741261B (en) | 1975-01-29 |
| BR7401610D0 (en) | 1974-11-19 |
| BE811605A (en) | 1974-08-26 |
| IT1008351B (en) | 1976-11-10 |
| DE2310920A1 (en) | 1975-01-30 |
| DE2310920B2 (en) | 1975-05-15 |
| JPS49119944A (en) | 1974-11-15 |
| NO740662L (en) | 1974-09-06 |
| ES423872A1 (en) | 1976-05-16 |
| AT332109B (en) | 1976-09-10 |
| AU6601274A (en) | 1975-08-28 |
| NO142611C (en) | 1980-09-17 |
| NO142611B (en) | 1980-06-09 |
| FR2220359B1 (en) | 1977-09-23 |
| FR2220359A1 (en) | 1974-10-04 |
| CA1047721A (en) | 1979-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |