EP1265732A1 - Procede de granulation de polymeres thermoplastiques - Google Patents

Procede de granulation de polymeres thermoplastiques

Info

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Withdrawn
Application number
EP01913869A
Other languages
German (de)
English (en)
Inventor
Michael Witt
Rainer Anderlik
Jürgen Hofmann
Thomas Kessler
Farid Rizk
Wolfgang Bickel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Basell Polyolefine GmbH
Original Assignee
Basell Polyolefine GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Basell Polyolefine GmbH filed Critical Basell Polyolefine GmbH
Publication of EP1265732A1 publication Critical patent/EP1265732A1/fr
Withdrawn legal-status Critical Current

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

L'invention concerne un procédé de granulation de polymères thermoplastiques, en particulier de polyoléfines thermoplastiques, consistant à fondre et à homogénéiser la poudre polymère fabriquée dans le réacteur de polymérisation, à la presser au travers d'une buse d'extrusion, puis à granuler cette poudre. Selon l'invention, la poudre polymère est soumise à un traitement thermique avant chargement dans l'extrudeuse, le chargement de ladite poudre polymère dans l'extrudeuse étant ainsi effectué avec une température de poudre supérieure. Ladite invention est particulièrement adaptée à la granulation de polyéthylène ou de polypropylène.
EP01913869A 2000-03-21 2001-03-13 Procede de granulation de polymeres thermoplastiques Withdrawn EP1265732A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10013948 2000-03-21
DE10013948A DE10013948A1 (de) 2000-03-21 2000-03-21 Verfahren zum Granulieren von thermoplastischen Polymeren
PCT/EP2001/002778 WO2001070473A1 (fr) 2000-03-21 2001-03-13 Procede de granulation de polymeres thermoplastiques

Publications (1)

Publication Number Publication Date
EP1265732A1 true EP1265732A1 (fr) 2002-12-18

Family

ID=7635751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01913869A Withdrawn EP1265732A1 (fr) 2000-03-21 2001-03-13 Procede de granulation de polymeres thermoplastiques

Country Status (11)

Country Link
US (1) US20030047831A1 (fr)
EP (1) EP1265732A1 (fr)
JP (1) JP2003530237A (fr)
KR (1) KR20030031470A (fr)
CN (1) CN1418145A (fr)
AU (1) AU3929401A (fr)
BR (1) BR0109331A (fr)
CA (1) CA2403431A1 (fr)
DE (1) DE10013948A1 (fr)
RU (1) RU2263576C2 (fr)
WO (1) WO2001070473A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
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 (fr) * 2003-04-30 2004-11-03 Coperion Werner & Pfleiderer GmbH & Co. KG Procédé de fusion et homogénéisation de polyoléfines bimodales ou multimodales
US7157032B2 (en) * 2003-11-21 2007-01-02 Gala Industries, Inc. Method and apparatus for making crystalline PET pellets
US20060038315A1 (en) * 2004-08-19 2006-02-23 Tunnell Herbert R Iii Oxygen tailoring of polyethylene resins
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
US7451600B2 (en) * 2005-07-06 2008-11-18 Pratt & Whitney Canada Corp. Gas turbine engine combustor with improved cooling
KR101158198B1 (ko) * 2007-10-31 2012-06-19 미쓰이 가가쿠 가부시키가이샤 폴리올레핀 펠렛의 제조 방법
DE102008023046A1 (de) * 2008-05-09 2009-11-12 Coperion Gmbh Kunststoffgranulieranlage sowie Kunststoffgranulierverfahren
CN102615735B (zh) * 2012-03-24 2014-05-28 佛山欣涛新材料科技有限公司 一种热熔胶粒生产流水线
US20150298359A1 (en) * 2012-11-28 2015-10-22 Ineos Europe Ag Compounding a polymer with a preheated pellet masterbatch
KR102134561B1 (ko) 2017-06-26 2020-07-16 바젤 폴리올레핀 게엠베하 펠릿 건조 및 탈기 방법
JP2019051652A (ja) * 2017-09-15 2019-04-04 ダイキン工業株式会社 電線の製造方法
CN109774001A (zh) * 2018-11-27 2019-05-21 江西势通钙业有限公司 一种高温水合设备及一种透明薄膜专用高填充量纳米碳酸钙母粒的制备方法

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FR1587500A (fr) * 1967-10-16 1970-03-20
US3597850A (en) * 1970-03-11 1971-08-10 Nat Service Ind Inc Continuous vacuum drier
DE2403295C2 (de) * 1973-07-09 1983-01-20 Nordenia-Kunststoffe Peter Mager Kg, 2841 Steinfeld Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststoffe
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 (de) * 1982-09-17 1984-03-22 Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff Verfahren und vorrichtung zur abfuehrung von gasen und daempfen aus mit schuettgut gefuelltem trocknungstrichter
FR2598350B1 (fr) * 1986-05-06 1989-11-17 Bp Chimie Sa Procede et dispositif pour degazer et pour transformer en granules des particules de polyolefines obtenues par polymerisation en phase gazeuse
DE69302523T2 (de) * 1992-06-17 1997-01-16 Nippon Catalytic Chem Ind Copolymer auf Basis von Maleimid und Verfahren zu seiner Herstellung

Non-Patent Citations (1)

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Title
See references of WO0170473A1 *

Also Published As

Publication number Publication date
RU2002128016A (ru) 2004-02-20
WO2001070473A1 (fr) 2001-09-27
CN1418145A (zh) 2003-05-14
BR0109331A (pt) 2002-12-24
AU3929401A (en) 2001-10-03
JP2003530237A (ja) 2003-10-14
CA2403431A1 (fr) 2002-09-17
US20030047831A1 (en) 2003-03-13
RU2263576C2 (ru) 2005-11-10
KR20030031470A (ko) 2003-04-21
DE10013948A1 (de) 2001-09-27

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