EP1265732A1 - Method for granulating thermoplastic polymers - Google Patents
Method for granulating thermoplastic polymersInfo
- Publication number
- EP1265732A1 EP1265732A1 EP01913869A EP01913869A EP1265732A1 EP 1265732 A1 EP1265732 A1 EP 1265732A1 EP 01913869 A EP01913869 A EP 01913869A EP 01913869 A EP01913869 A EP 01913869A EP 1265732 A1 EP1265732 A1 EP 1265732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer powder
- extruder
- polymer
- temperature
- heat treatment
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/021—Heat treatment of powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with 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
- B29C48/285—Feeding the extrusion material to the extruder
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/287—Raw material pre-treatment while feeding
-
- 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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/04—Particle-shaped
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Definitions
- the present invention relates to a method for granulating thermoplastic polymers, in particular thermoplastic polyolefms, in which the polymer powder produced in the polymerization reactor is melted and homogenized in an extruder, then pressed through an extrusion die and then cooled and comminuted
- thermoplastic polymers The granulation of thermoplastic polymers is known and serves to homogenize the polymer and, if necessary, to incorporate additives and additives such as stabilizers, colorants, agents for improving the mechanical properties, fillers and the like into the polymer.
- additives and additives such as stabilizers, colorants, agents for improving the mechanical properties, fillers and the like into the polymer.
- the handling of the thermoplastic polymers during transport can be and further improve processing by granulation compared to handling powder
- the addition of polymer powder to the extruder is particularly important in a so-called compounding process Temperature that corresponds to the ambient temperature, usual. This is due in particular to the intermediate storage of the polymer powder in silo systems and to the transport methods via pneumatic front systems, with the powder generally being completely cooled to ambient temperature
- the object of the present invention was to provide a method for granulating thermoplastic polymers in which the effectiveness of the homogenization during the granulation is increased at a constant throughput or in which the machine load can be reduced, which is noticeable by reduced susceptibility to repairs and reduced downtimes , or in which the product throughput of existing pelletizing plants can be increased while maintaining the homogenization performance.
- the heat treatment according to the invention is preferably carried out with such an intensity that the temperature of the polymer powder rises to a value in the range from 5 to 30 K below the melting temperature of the polymer, preferably in the range from 10 to 20 K.
- the heat treatment according to the invention can be implemented in a wide variety of ways, for example the polymer powder can be heated with steam and then dried with hot air, or it can be passed through an externally heated tube.
- the polymer powder is heated in a bulk material heat exchanger, as described in the journal Chemietechnik (1999) No. 4, page 84.
- the mass flow is controlled by an oscillating conveyor and the polymer powder flows through heated metal plates.
- the thermal energy required for the heat treatment according to the invention can advantageously be applied according to the invention by waste heat which is inexpensively available on the production site.
- a good example of such The exothermic polymerization reaction is waste heat, which releases large amounts of heat.
- the thermal energy required for the method according to the invention can also be made available at low cost from the cooling of other production plants
- Standard polymers such as polyolefins, polyesters or polyamides, but preferably polyethylene or polypropylene, have proven to be advantageous polymers which can be granulated particularly well by the process according to the invention.
- the temperature of the polymer powder according to the invention when added to the extruder, is preferably in the range from 80 to 100 ° C, while a temperature of 100 to 120 ° C is particularly suitable for polypropylene
- the amount of energy required to heat an HDPE powder from 20 ° C to 100 ° C is 42.4 kcal / kg powder (source "Specific heat of low pressure polyethylene ', H Wilski, Kunststoffe 50 (5) 1960)
- a granite extruder with a capacity of 6 t / h requires a specific total energy input of 0.2 kWh / kg HDPE if the powder has an initial temperature of 20 ° C.
- 0.05 kWh / kg is used to heat the powder at 20 to 100 ° C, i.e. around 25%, based on the total quantity.
- This reflects the theoretically maximum achievable savings potential, which, however, cannot be fully realized in practice
- the above-mentioned pelletizing extruder with electricity costs of around 9.0 pfennigs per kWh per year, causes operating costs of 950 TDM. If polymer powder is supplied at a temperature of 100 ° C, these operating costs can be reduced by 20%.
- the energy of 0.05 kWh / kg must be introduced in another way, for example using very inexpensive steam (process heat).
- the preheating of the polymer powder can alternatively also increase the machine's output.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10013948A DE10013948A1 (en) | 2000-03-21 | 2000-03-21 | Granulation of thermoplastic polymers, especially polyolefins, comprises preheating polymer powder and feeding it at high temperature to extruder where it is melted, homogenised and compressed and then cooled and comminuted |
DE10013948 | 2000-03-21 | ||
PCT/EP2001/002778 WO2001070473A1 (en) | 2000-03-21 | 2001-03-13 | Method for granulating thermoplastic polymers |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1265732A1 true EP1265732A1 (en) | 2002-12-18 |
Family
ID=7635751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01913869A Withdrawn EP1265732A1 (en) | 2000-03-21 | 2001-03-13 | Method for granulating thermoplastic polymers |
Country Status (11)
Country | Link |
---|---|
US (1) | US20030047831A1 (en) |
EP (1) | EP1265732A1 (en) |
JP (1) | JP2003530237A (en) |
KR (1) | KR20030031470A (en) |
CN (1) | CN1418145A (en) |
AU (1) | AU3929401A (en) |
BR (1) | BR0109331A (en) |
CA (1) | CA2403431A1 (en) |
DE (1) | DE10013948A1 (en) |
RU (1) | RU2263576C2 (en) |
WO (1) | WO2001070473A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050012235A1 (en) * | 2001-11-30 | 2005-01-20 | Schregenberger Sandra D | Oxygen tailoring of polyethylene resins |
EP1473137A1 (en) * | 2003-04-30 | 2004-11-03 | Coperion Werner & Pfleiderer GmbH & Co. KG | Process for melting and homogenizing bimodal or multimodal polyolefins |
US7157032B2 (en) * | 2003-11-21 | 2007-01-02 | Gala Industries, Inc. | Method and apparatus for making crystalline PET pellets |
US7892466B2 (en) | 2004-08-19 | 2011-02-22 | Univation Technologies, Llc | Oxygen tailoring of polyethylene resins |
US8202940B2 (en) | 2004-08-19 | 2012-06-19 | Univation Technologies, Llc | Bimodal polyethylene compositions for blow molding applications |
US20060038315A1 (en) * | 2004-08-19 | 2006-02-23 | Tunnell Herbert R Iii | Oxygen tailoring of polyethylene resins |
US7451600B2 (en) * | 2005-07-06 | 2008-11-18 | Pratt & Whitney Canada Corp. | Gas turbine engine combustor with improved cooling |
EP2216152A4 (en) * | 2007-10-31 | 2014-05-21 | Mitsui Chemicals Inc | Process for production of polyolefin pellets |
DE102008023046A1 (en) * | 2008-05-09 | 2009-11-12 | Coperion Gmbh | Plastic granulating plant has granulating device that is water-cooled with granulated-water, where bulk-cargo heat exchanger is provided with heat exchanger medium for heating plastic-bulk cargo |
CN102615735B (en) * | 2012-03-24 | 2014-05-28 | 佛山欣涛新材料科技有限公司 | Hot melt adhesive particle production line |
CN104797636A (en) * | 2012-11-28 | 2015-07-22 | 英尼奥斯欧洲股份公司 | Compounding a polymer with a preheated pellet masterbatch |
US11549749B2 (en) | 2017-06-26 | 2023-01-10 | Basell Polyolefine Gmbh | Pellet drying and degassing method |
JP2019051652A (en) * | 2017-09-15 | 2019-04-04 | ダイキン工業株式会社 | Method for manufacturing electric wire |
CN109774001A (en) * | 2018-11-27 | 2019-05-21 | 江西势通钙业有限公司 | A kind of preparation method of high temperature hydrating apparatus and a kind of dedicated high filler loading capacity nanometer calcium carbonate master batch of transparent membrane |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1587500A (en) * | 1967-10-16 | 1970-03-20 | ||
US3597850A (en) * | 1970-03-11 | 1971-08-10 | Nat Service Ind Inc | Continuous vacuum drier |
DE2403295C2 (en) * | 1973-07-09 | 1983-01-20 | Nordenia-Kunststoffe Peter Mager Kg, 2841 Steinfeld | Device for preheating powdery or granular thermoplastics |
US4636085A (en) * | 1982-03-16 | 1987-01-13 | Mapro Inc. | Apparatus for removing volatiles from plastic materials delivered to an extrusion or injection molding machine |
DE3234431A1 (en) * | 1982-09-17 | 1984-03-22 | Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff | METHOD AND DEVICE FOR REMOVING GASES AND STEAMS FROM DRYING FUNNELS FILLED WITH BULK MATERIAL |
FR2598350B1 (en) * | 1986-05-06 | 1989-11-17 | Bp Chimie Sa | PROCESS AND DEVICE FOR DEGASSING AND FOR CONVERTING POLYOLEFIN PARTICLES OBTAINED BY GAS PHASE POLYMERIZATION |
EP0575104B1 (en) * | 1992-06-17 | 1996-05-08 | Nippon Shokubai Co., Ltd. | Maleimide-based copolymer and process for producing it |
-
2000
- 2000-03-21 DE DE10013948A patent/DE10013948A1/en not_active Withdrawn
-
2001
- 2001-03-13 JP JP2001568708A patent/JP2003530237A/en active Pending
- 2001-03-13 BR BR0109331-2A patent/BR0109331A/en not_active IP Right Cessation
- 2001-03-13 CA CA002403431A patent/CA2403431A1/en not_active Abandoned
- 2001-03-13 KR KR1020027012397A patent/KR20030031470A/en not_active Application Discontinuation
- 2001-03-13 US US10/221,706 patent/US20030047831A1/en not_active Abandoned
- 2001-03-13 AU AU39294/01A patent/AU3929401A/en not_active Abandoned
- 2001-03-13 WO PCT/EP2001/002778 patent/WO2001070473A1/en not_active Application Discontinuation
- 2001-03-13 EP EP01913869A patent/EP1265732A1/en not_active Withdrawn
- 2001-03-13 RU RU2002128016/12A patent/RU2263576C2/en not_active IP Right Cessation
- 2001-03-13 CN CN01806851A patent/CN1418145A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0170473A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2003530237A (en) | 2003-10-14 |
WO2001070473A1 (en) | 2001-09-27 |
AU3929401A (en) | 2001-10-03 |
DE10013948A1 (en) | 2001-09-27 |
RU2263576C2 (en) | 2005-11-10 |
CA2403431A1 (en) | 2002-09-17 |
BR0109331A (en) | 2002-12-24 |
KR20030031470A (en) | 2003-04-21 |
US20030047831A1 (en) | 2003-03-13 |
CN1418145A (en) | 2003-05-14 |
RU2002128016A (en) | 2004-02-20 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20020912 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
17Q | First examination report despatched |
Effective date: 20030411 |
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RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH CY DE DK ES FI FR GB IT LI |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BASELL POLYOLEFINE GMBH |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FI FR GB IT |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20060801 |