GB1431978A - Process and apparatus for removing volatile components of materials - Google Patents
Process and apparatus for removing volatile components of materialsInfo
- Publication number
- GB1431978A GB1431978A GB5970373A GB5970373A GB1431978A GB 1431978 A GB1431978 A GB 1431978A GB 5970373 A GB5970373 A GB 5970373A GB 5970373 A GB5970373 A GB 5970373A GB 1431978 A GB1431978 A GB 1431978A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- zone
- gas
- pressure
- plastics
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/762—Vapour stripping
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/82—Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
1431978 Evaporating solvent from plastics WELDING ENGS INC 22 Dec 1973 59703/73 Heading BIB [Also in Divisions B4 and B5] A volatile component is removed from a plastics material in a screw extruder, by a gas which is injected into the material in a zone of the extruder to flow in the opposite direction to that in which the material is being delivered by the extruder screw. The gas is injected at 28 at a location in the zone 27 at which the material fully fills the screw flight and is at a pressure which is lower than that of the gas and of the material downstream thereof, but is higher than at an upstream location 34 at which the gas and volatile component are vented. The described apparatus comprises a non-intermeshing twin-screw extruder heated by a jacket 16 and which, upstream of the zone 27 comprises a zone, or more than one zone, separated by cylindrical or reverse pitch screw segments, in which vapour is removed e.g. at above atmospheric pressure, by a vent 20 adjacent a reduced diameter shaft section 22 of the screws. The zone 27 is defined between pressure sealing cylindrical, or reverse thread, screw segments 24, 26, and a lower pressure of material adjacent vent 34 is maintained by a reduced diameter screw shaft with the higher pressure adjacent location 28 being maintained by the segment 26 and a decreased screw pitch ensuring that the screw is filled. The gas and component are removed at atmospheric pressure, or under vacuum at 34, with intermeshing twin screws 30, 32 being provided to return any escaping plastics material. Downstream of zone 27, water may be injected to effect cooling of the plastics, being removed as vapour under reduced pressure at 38 together with some of the gas injected at 28. The plastics may comprise polystyrene, polypropylene and polycarbonates, but the examples relate to polyethylene from which hexane or a mixed hexane-cyclohexane solvent volatile component is removed by steam.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US401360A US3917507A (en) | 1971-02-22 | 1973-09-27 | Countercurrent combined liquid and vapor stripping in screw devolatilizer |
GB5970373A GB1431978A (en) | 1971-02-22 | 1973-12-22 | Process and apparatus for removing volatile components of materials |
FR7347032A FR2256025A1 (en) | 1973-12-22 | 1973-12-28 | Removal of volatile material from screw feed extruder - by injecting gas into high press. zone of plastic melt and removing it from low press. zone |
BE139529A BE809407A (en) | 1971-02-22 | 1974-01-04 | PROCESS AND DEVICE FOR TRAINING VOLATILE CONSTITUENTS WITH STEAM INSIDE A SCREW EXTRUDER. |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00117332A US3799234A (en) | 1971-02-22 | 1971-02-22 | Countercurrent vapor stripping in screw devolatilizer |
US401360A US3917507A (en) | 1971-02-22 | 1973-09-27 | Countercurrent combined liquid and vapor stripping in screw devolatilizer |
GB5970373A GB1431978A (en) | 1971-02-22 | 1973-12-22 | Process and apparatus for removing volatile components of materials |
FR7347032A FR2256025A1 (en) | 1973-12-22 | 1973-12-28 | Removal of volatile material from screw feed extruder - by injecting gas into high press. zone of plastic melt and removing it from low press. zone |
DE2400271A DE2400271C2 (en) | 1971-02-22 | 1974-01-04 | Method and device for expelling volatile components from plastic flowing in the direction of extrusion |
BE139529A BE809407A (en) | 1971-02-22 | 1974-01-04 | PROCESS AND DEVICE FOR TRAINING VOLATILE CONSTITUENTS WITH STEAM INSIDE A SCREW EXTRUDER. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1431978A true GB1431978A (en) | 1976-04-14 |
Family
ID=27543003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5970373A Expired GB1431978A (en) | 1971-02-22 | 1973-12-22 | Process and apparatus for removing volatile components of materials |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE809407A (en) |
GB (1) | GB1431978A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4980105A (en) * | 1989-08-28 | 1990-12-25 | General Electric Company | Method for extruder devolatilization of spiro(bis)indane polycarbonates |
WO1999006197A1 (en) * | 1997-08-01 | 1999-02-11 | Sedepro | Continuous rubber kneader |
DE19854689A1 (en) * | 1998-11-26 | 2000-06-08 | Buehler Ag | Method and device for processing a thermoplastic polycondensate |
US6273599B1 (en) | 1999-09-17 | 2001-08-14 | Flint Ink Corporation | Process for preparing pigment flush |
US6576131B1 (en) | 1997-12-16 | 2003-06-10 | Flint Ink Corporation | Process and apparatus for changing the wetting agent of pigments |
ITMI20082348A1 (en) * | 2008-12-30 | 2010-06-30 | Meccaniche Luigi Bander A S P A Costruzioni | EXPANDED EXPANDED POLYESTER EXTRUSION PROCESS AND EQUIPMENT APPLICABLE TO PRODUCTION OF LEAVES, SHEETS OR EXPANDED POLYESTER TUBES |
US7947126B2 (en) | 2004-08-17 | 2011-05-24 | Flint Group Incorporated | Processes for preparing organic pigment dispersions and ink |
-
1973
- 1973-12-22 GB GB5970373A patent/GB1431978A/en not_active Expired
-
1974
- 1974-01-04 BE BE139529A patent/BE809407A/en not_active IP Right Cessation
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4980105A (en) * | 1989-08-28 | 1990-12-25 | General Electric Company | Method for extruder devolatilization of spiro(bis)indane polycarbonates |
WO1999006197A1 (en) * | 1997-08-01 | 1999-02-11 | Sedepro | Continuous rubber kneader |
WO1999006198A1 (en) * | 1997-08-01 | 1999-02-11 | Sedepro | Continuous rubber kneader |
US6312148B1 (en) | 1997-08-01 | 2001-11-06 | Sedepro Societe Anonyme | Removal of gaseous phase from continuous mixing chamber for rubber compound |
US6576131B1 (en) | 1997-12-16 | 2003-06-10 | Flint Ink Corporation | Process and apparatus for changing the wetting agent of pigments |
DE19854689A1 (en) * | 1998-11-26 | 2000-06-08 | Buehler Ag | Method and device for processing a thermoplastic polycondensate |
US6273599B1 (en) | 1999-09-17 | 2001-08-14 | Flint Ink Corporation | Process for preparing pigment flush |
US6305838B1 (en) * | 1999-09-17 | 2001-10-23 | Flint Ink Corporation | Process and apparatus for preparing pigment flush |
US6348091B1 (en) | 1999-09-17 | 2002-02-19 | Flint Ink Corporation | Process and apparatus for preparing pigment flush in response to a material property value |
US7947126B2 (en) | 2004-08-17 | 2011-05-24 | Flint Group Incorporated | Processes for preparing organic pigment dispersions and ink |
ITMI20082348A1 (en) * | 2008-12-30 | 2010-06-30 | Meccaniche Luigi Bander A S P A Costruzioni | EXPANDED EXPANDED POLYESTER EXTRUSION PROCESS AND EQUIPMENT APPLICABLE TO PRODUCTION OF LEAVES, SHEETS OR EXPANDED POLYESTER TUBES |
WO2010076652A1 (en) * | 2008-12-30 | 2010-07-08 | Costruzioni Meccaniche Luigi Bandera S.P.A | Foamed polyester extrusion process and equipment which can be used in plants for producing sheets, boards or tubes of foamed polyester |
Also Published As
Publication number | Publication date |
---|---|
BE809407A (en) | 1974-05-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |