WO2005044901A1 - Verfahren zur thermischen behandlung von polyesterpellets - Google Patents
Verfahren zur thermischen behandlung von polyesterpellets Download PDFInfo
- Publication number
- WO2005044901A1 WO2005044901A1 PCT/DE2004/001778 DE2004001778W WO2005044901A1 WO 2005044901 A1 WO2005044901 A1 WO 2005044901A1 DE 2004001778 W DE2004001778 W DE 2004001778W WO 2005044901 A1 WO2005044901 A1 WO 2005044901A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- granules
- conveyor
- water
- temperature
- thermal treatment
- Prior art date
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
-
- 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
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
-
- 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
- B29B9/16—Auxiliary treatment of granules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/88—Post-polymerisation treatment
-
- 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
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0041—Crystalline
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Definitions
- the invention relates to a process for the thermal treatment of polyester pellets in order to achieve crystallization.
- Polyethylene terephthalate is a polyester having repeating ester groups.
- PET can be present in various structures, namely in amorphous or in crystalline or partially crystalline form.
- Amorphous PET is mostly transparent, crystalline PET is opaque or white.
- thermoplastics that can occur in amorphous or crystalline form, even with PET, a degree of crystallization of 100% is not possible. Only a part of the structure of the PET is able to orient itself, ie to crystallize. Crystalline and amorphous areas alternate. Therefore, there is always talk of a partial crystallinity. With PET, a degree of crystallization of about 50% can be achieved in order to prevent the pellets or granules from sticking together.
- thermoplastic PET As a thermoplastic PET is moldable at temperatures of 250 ° C. The molecular chains are then moved so that the plastic melts and a viscous mass is formed, which can be brought into almost any shape. When cooled, the molecular chains freeze again and the plastic solidifies in the desired shape - a simple and repeatable principle.
- This method is also used, for example, in the production of PET bottles. In a first step, so-called preforms are produced. As precursors of PET bottles, these preforms already have finished screw threads. To get proper bottles, they are softened again at 100 ° C, stretched with compressed air and blown to a bottle (stretch blown process).
- a PET granulate must be crystallized at a temperature below that at which the material becomes tacky to prevent the granules from flowing together into a solid and hardly processable mass.
- the melting temperature of the crystallized polyester is only at 240 to 250 ° C, it can be tacky even before crystallization at temperatures above about 70 ° C.
- US Pat. No. 5,532,335 A proposes a process for the thermal treatment of polyester pellets, in which the pellets are introduced into a treatment vessel and a liquid medium is likewise passed into this treatment vessel, the pellets and the liquid medium being mixed with one another.
- pressurized or so-called superheated water is used as the liquid medium in the proposed process.
- the cooking temperature can be easily controlled by changing the pressure in the reactor vessel.
- polyester pellets are treated at 120 ° -182 ° C.
- the water is introduced at 160 ° C, kept in the liquid state and mixed with the pellets while maintaining the pressure in the reactor unit at 7 kg / cm 2 or higher. It is obvious that such a process is extremely expensive and therefore difficult to carry out economically.
- the object of the invention is to propose a process for the crystallization of PET granules which does not require the supply of external energy or heat and does not require long residence times.
- the PET raw material be extruded in an extruder at a suitable temperature. Subsequently, impurities are removed by means of z. B. screen changer technology filtered out.
- the polymer melt is fed to an "underwater hot-cut pelletizing system”, hereinafter referred to as “underwater pelletizing”, and processed into granules which, owing to underwater granulation, have a spherical shape or lens shape and have a high core temperature.
- PET granules are conveyed via a delivery line at high speed to a water-solids separation device, being used as the delivery medium hot water, preferably up to 98 ° C.
- a water-solids separation device being used as the delivery medium hot water, preferably up to 98 ° C.
- An important aspect for the effectiveness of the method according to the invention are relatively short conveying paths between the granulation chamber and the water-solids separation device.
- the PET granules leave the water-solid separation device with a core temperature of 130-180 ° C, since care is taken that the extrusion temperature of the PET is maintained as long as possible.
- the granules having this temperature are then subjected to a movement, wherein the crystallization begins.
- This crystallization according to the method of the invention is due to the heat of its own and hereby ensures that the product, d. H. no longer clump the granules and no longer stick together.
- This effect is also increased by the fact that the product to be crystallized has spherical or lenticular form, ie, it can make do with the smallest possible contact surfaces.
- the residence time of the spherical granules in the movement phase is, for example, 3 to 8 minutes and after passing through this phase, the PET granules are crystallized to 40% or more and have a temperature of greater than 100 ° C.
- the transport of the hot PET granules in a storage silo or in a post-treatment station is possible because the granules no longer stick together.
- a further object of the invention is to propose a device with which the movement of the granules is made possible in an effective manner.
- a so-called crystallization trough is preferably provided.
- This crystallization trough has a similar structure to a granulate conveying trough, but, as seen in the conveying direction, is subdivided into successive chambers, which are separated from one another by weirs.
- the crystallization channel Vibration motors are installed so that the granules in them are permanently moved and can thus release their own energy to other granulates. In the individual chambers, a circulation of PET granules takes place and sticking of the granules is no longer possible.
- 1 denotes a melt pump and a screen changer, to which a polyester is fed according to the arrow Fi.
- an underwater granulator 2 is provided, are produced by the spherical or lenticular granules. These granules are conveyed by a conveyor to a water-solids separator 3, z. B. a centrifuge, wherein the promotion is carried out by process water, which preferably has a temperature of about 80 °.
- the granules leave the water-solids separation device 3 with a temperature of over 110 ° and are fed to a conveyor trough 4, which can be supplied at 5 supply air leaving the conveyor 4 at 6 and provides for removal of moisture.
- the conveyor 4 is designed as a conveyor trough with respect to the conveying direction transversely aligned weirs 7, and the granules leave the conveyor 4 with a granule temperature of about 100 ° and can be fed via a so-called granule 8 an aftertreatment device 9 or a silo 10. These granules are 40% and more crystallized and handled.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Polyesters Or Polycarbonates (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04762623A EP1608696B1 (de) | 2003-10-17 | 2004-08-07 | Verfahren zur thermischen behandlung von polyesterpellets |
DE502004000842T DE502004000842D1 (de) | 2003-10-17 | 2004-08-07 | Verfahren zur thermischen behandlung von polyesterpellets |
PL04762623T PL1608696T3 (pl) | 2003-10-17 | 2004-08-07 | Sposób termicznej obróbki granulek poliestrowych |
JP2006508127A JP4724654B2 (ja) | 2003-10-17 | 2004-08-07 | ポリエステルペレットを熱処理する方法と装置 |
MXPA05013108A MXPA05013108A (es) | 2003-10-17 | 2004-08-07 | Procedimiento para el tratamiento termico de pellets de poliester. |
CA002515692A CA2515692A1 (en) | 2003-10-17 | 2004-08-07 | Method for the thermal treatment of polyester pellets |
BRPI0409489-1A BRPI0409489A (pt) | 2003-10-17 | 2004-08-07 | procedimento para o processamento térmico de esferas de poliéster e dispositivo para executar tal procedimento |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10349016A DE10349016B4 (de) | 2003-10-17 | 2003-10-17 | Verfahren zur Wärmebehandlung von Pellets aus PET |
DE10349016.7 | 2003-10-17 | ||
DE102004021595.2A DE102004021595B4 (de) | 2004-05-03 | 2004-05-03 | Vorrichtung zur Herstellung von Kunststoffgranulat |
DE102004021595.2 | 2004-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005044901A1 true WO2005044901A1 (de) | 2005-05-19 |
Family
ID=34524035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2004/001778 WO2005044901A1 (de) | 2003-10-17 | 2004-08-07 | Verfahren zur thermischen behandlung von polyesterpellets |
Country Status (12)
Country | Link |
---|---|
US (2) | US8324339B2 (de) |
EP (1) | EP1608696B1 (de) |
JP (1) | JP4724654B2 (de) |
AT (1) | ATE330985T1 (de) |
BR (1) | BRPI0409489A (de) |
CA (1) | CA2515692A1 (de) |
DE (1) | DE502004000842D1 (de) |
ES (1) | ES2267075T3 (de) |
MX (1) | MXPA05013108A (de) |
PL (1) | PL1608696T3 (de) |
RU (1) | RU2292362C2 (de) |
WO (1) | WO2005044901A1 (de) |
Cited By (16)
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DE102005010706A1 (de) * | 2005-03-09 | 2006-09-14 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Verfahren zur thermischen Behandlung von Polyesterpellets |
WO2006128408A1 (de) * | 2005-06-01 | 2006-12-07 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Verfahren zur thermischen behandlung von polyesterpellets, um eine teilkristallisation zu erreichen |
WO2007022994A1 (de) | 2005-08-26 | 2007-03-01 | Lurgi Zimmer Gmbh | Verfahren und vorrichtung zur verringerung des acetaldehydgehaltes von polyestergranulat |
WO2007025903A1 (de) | 2005-08-29 | 2007-03-08 | Vibra Maschinenfabrik Schultheis Gmbh & Co | Verfahren und vorrichtung zum kristallisieren von zum verkleben neigenden kunststoffgranulaten, insbesondere pet- und pu-granulaten |
WO2007131803A1 (de) * | 2006-05-17 | 2007-11-22 | Lurgi Zimmer Gmbh | Verfahren und vorrichtung zur wiederverwertung von polyestermaterial |
WO2009062321A1 (de) * | 2007-11-16 | 2009-05-22 | Bühler AG | Verfahren zur kristallisation von kristallisierbaren polymeren mit hoher klebeneigung |
DE102006013062B4 (de) * | 2006-03-22 | 2010-09-09 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Verfahren zur thermischen Behandlung von Polyester |
AU2004317560B2 (en) * | 2004-03-28 | 2010-11-25 | Lurgi Zimmer Gmbh | Method for the production of highly condensed polyester granulate |
US7977448B2 (en) | 2004-03-04 | 2011-07-12 | Lurgi Zimmer Gmbh | Method for producing highly condensed solid-phase polyesters |
US8063176B2 (en) | 2006-03-16 | 2011-11-22 | Lurgi Zimmer Gmbh | Method and device for the crystallization of polyester material |
US8324339B2 (en) | 2003-10-17 | 2012-12-04 | Eastman Chemical Company | Method and apparatus for thermally processing polyester pellets |
DE102013109003A1 (de) * | 2013-08-20 | 2015-02-26 | Automatik Plastics Machinery Gmbh | Vorrichtung und Verfahren zum Trocknen von Kunststoffgranulatkörnern |
WO2015036115A1 (de) * | 2013-09-11 | 2015-03-19 | Automatik Plastics Machinery Gmbh | Verfahren zur herstellung von oberflächig kristallinen sphärischen granulaten mittels trockenheissabschlag und vorrichtung zur durchführung des verfahrens |
EP2433771B1 (de) | 2010-09-28 | 2016-12-21 | Uhde Inventa-Fischer GmbH | Verfahren zur Erhöhung des Molekulargewichts unter Nutzung der Restwärme von Polyestergranulat |
US20170260339A1 (en) * | 2014-07-22 | 2017-09-14 | Technip Zimmer Gmbh | Process and system for producing pet granules |
EP2570247B1 (de) | 2011-09-19 | 2018-03-28 | Uhde Inventa-Fischer GmbH | Trocknungs-/Entgasungsvorrichtung sowie Vorrichtung und Verfahren zur direkten Herstellung von Formkörpern aus Polyesterschmelzen |
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- 2004-08-07 BR BRPI0409489-1A patent/BRPI0409489A/pt not_active IP Right Cessation
- 2004-08-07 RU RU2005130773/04A patent/RU2292362C2/ru not_active IP Right Cessation
- 2004-08-07 MX MXPA05013108A patent/MXPA05013108A/es not_active Application Discontinuation
- 2004-08-07 ES ES04762623T patent/ES2267075T3/es active Active
- 2004-08-07 PL PL04762623T patent/PL1608696T3/pl unknown
- 2004-08-07 WO PCT/DE2004/001778 patent/WO2005044901A1/de active IP Right Grant
- 2004-08-07 AT AT04762623T patent/ATE330985T1/de active
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US8324339B2 (en) | 2003-10-17 | 2012-12-04 | Eastman Chemical Company | Method and apparatus for thermally processing polyester pellets |
US7977448B2 (en) | 2004-03-04 | 2011-07-12 | Lurgi Zimmer Gmbh | Method for producing highly condensed solid-phase polyesters |
AU2004317560B2 (en) * | 2004-03-28 | 2010-11-25 | Lurgi Zimmer Gmbh | Method for the production of highly condensed polyester granulate |
DE102005010706B4 (de) * | 2005-03-09 | 2009-11-12 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Vorrichtung zur thermischen Behandlung von Polyesterpellets |
DE102005010706A1 (de) * | 2005-03-09 | 2006-09-14 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Verfahren zur thermischen Behandlung von Polyesterpellets |
WO2006128408A1 (de) * | 2005-06-01 | 2006-12-07 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Verfahren zur thermischen behandlung von polyesterpellets, um eine teilkristallisation zu erreichen |
WO2007022994A1 (de) | 2005-08-26 | 2007-03-01 | Lurgi Zimmer Gmbh | Verfahren und vorrichtung zur verringerung des acetaldehydgehaltes von polyestergranulat |
US7521522B2 (en) | 2005-08-26 | 2009-04-21 | Lurgi Zimmer Gmbh | Method and device to reduce the acetaldehyde content of polyester granulate |
WO2007025903A1 (de) | 2005-08-29 | 2007-03-08 | Vibra Maschinenfabrik Schultheis Gmbh & Co | Verfahren und vorrichtung zum kristallisieren von zum verkleben neigenden kunststoffgranulaten, insbesondere pet- und pu-granulaten |
DE102005040851B3 (de) * | 2005-08-29 | 2007-04-05 | Vibra Maschinenfabrik Schultheis Gmbh & Co. | Verfahren und Vorrichtung zum Kristallisieren von zum Verkleben neigenden Kunststoffgranulaten, insbesondere PET- und PU-Granulaten |
US8063176B2 (en) | 2006-03-16 | 2011-11-22 | Lurgi Zimmer Gmbh | Method and device for the crystallization of polyester material |
DE102006013062B4 (de) * | 2006-03-22 | 2010-09-09 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Verfahren zur thermischen Behandlung von Polyester |
EA013897B1 (ru) * | 2006-05-17 | 2010-08-30 | Лурги Циммер Гмбх | Способ и устройство для вторичного использования полиэфирного материала |
WO2007131803A1 (de) * | 2006-05-17 | 2007-11-22 | Lurgi Zimmer Gmbh | Verfahren und vorrichtung zur wiederverwertung von polyestermaterial |
CN101861238A (zh) * | 2007-11-16 | 2010-10-13 | 布勒股份公司 | 强易粘性可结晶聚合物的结晶方法 |
WO2009062321A1 (de) * | 2007-11-16 | 2009-05-22 | Bühler AG | Verfahren zur kristallisation von kristallisierbaren polymeren mit hoher klebeneigung |
RU2476315C2 (ru) * | 2007-11-16 | 2013-02-27 | Бюлер Аг | Способ кристаллизации кристаллизуемых полимеров с высокой склонностью к склеиванию |
US8728368B2 (en) | 2007-11-16 | 2014-05-20 | Bühler Thermal Processes Ag | Method for crystallizing crystallizable polymers having a high tendency to agglomerate |
EP2433771B1 (de) | 2010-09-28 | 2016-12-21 | Uhde Inventa-Fischer GmbH | Verfahren zur Erhöhung des Molekulargewichts unter Nutzung der Restwärme von Polyestergranulat |
EP2570247B1 (de) | 2011-09-19 | 2018-03-28 | Uhde Inventa-Fischer GmbH | Trocknungs-/Entgasungsvorrichtung sowie Vorrichtung und Verfahren zur direkten Herstellung von Formkörpern aus Polyesterschmelzen |
DE102013109003A1 (de) * | 2013-08-20 | 2015-02-26 | Automatik Plastics Machinery Gmbh | Vorrichtung und Verfahren zum Trocknen von Kunststoffgranulatkörnern |
WO2015036115A1 (de) * | 2013-09-11 | 2015-03-19 | Automatik Plastics Machinery Gmbh | Verfahren zur herstellung von oberflächig kristallinen sphärischen granulaten mittels trockenheissabschlag und vorrichtung zur durchführung des verfahrens |
US20170260339A1 (en) * | 2014-07-22 | 2017-09-14 | Technip Zimmer Gmbh | Process and system for producing pet granules |
Also Published As
Publication number | Publication date |
---|---|
ES2267075T3 (es) | 2007-03-01 |
BRPI0409489A (pt) | 2006-05-02 |
US8324339B2 (en) | 2012-12-04 |
JP2006526049A (ja) | 2006-11-16 |
ATE330985T1 (de) | 2006-07-15 |
US20050085620A1 (en) | 2005-04-21 |
PL1608696T3 (pl) | 2006-09-29 |
RU2292362C2 (ru) | 2007-01-27 |
EP1608696B1 (de) | 2006-06-21 |
RU2005130773A (ru) | 2006-02-10 |
JP4724654B2 (ja) | 2011-07-13 |
CA2515692A1 (en) | 2005-05-19 |
MXPA05013108A (es) | 2006-03-17 |
US20080071061A1 (en) | 2008-03-20 |
DE502004000842D1 (de) | 2006-08-03 |
EP1608696A1 (de) | 2005-12-28 |
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