[go: up one dir, main page]

EP3833523A1 - Procédé de préparation de matières thermoplastiques destinées à être réutilisées - Google Patents

Procédé de préparation de matières thermoplastiques destinées à être réutilisées

Info

Publication number
EP3833523A1
EP3833523A1 EP19755307.6A EP19755307A EP3833523A1 EP 3833523 A1 EP3833523 A1 EP 3833523A1 EP 19755307 A EP19755307 A EP 19755307A EP 3833523 A1 EP3833523 A1 EP 3833523A1
Authority
EP
European Patent Office
Prior art keywords
flakes
pet
separated
polyethylene terephthalate
thermoplastic
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.)
Pending
Application number
EP19755307.6A
Other languages
German (de)
English (en)
Inventor
Robert Siegl
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.)
Alpla Werke Alwin Lehner GmbH and Co KG
Original Assignee
Alpla Werke Alwin Lehner GmbH and Co KG
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 Alpla Werke Alwin Lehner GmbH and Co KG filed Critical Alpla Werke Alwin Lehner GmbH and Co KG
Publication of EP3833523A1 publication Critical patent/EP3833523A1/fr
Pending 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B2017/001—Pretreating the materials before recovery
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B2017/001—Pretreating the materials before recovery
    • B29B2017/0015—Washing, rinsing
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0217—Mechanical separating techniques; devices therefor
    • B29B2017/0224—Screens, sieves
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0279—Optical identification, e.g. cameras or spectroscopy
    • 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
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • thermoplastics are provided thermoplastics
  • the invention relates to a method according to the preamble of claim 1.
  • the invention also relates to a semifinished product or plastic packaging, such as beverage bottles, which are produced with a thermoplastic, which have been processed according to this method, and a processing system for carrying out this method.
  • PET Polyethylene terephthalate
  • PET packaging in particular PET bottles, is used which have been produced entirely from recycled PET. This 100% recycling rate is possible, but the exception, as impurities in PET generally do not allow this to be 100%.
  • One of the known problems with repeated recycling is the progressive yellowing, clouding and graying of the PET.
  • the PET With each further recycling cycle, the PET becomes yellow, cloudy and gray.
  • the yellow tinge can be compensated for by adding blue color. With this color compensation, however, the PET becomes darker and grayer.
  • a PET that has become yellow and / or darker with ongoing recycling stages can often no longer meet the optical requirements of high-quality packaging.
  • PET bottles can contain polyamide in layers or mixed to provide a barrier against oxygen and carbon dioxide.
  • PET bottles mixed with polyamides have a particularly negative effect on the yellow tinge of the regrind, since polyamide yellows much more than PET over time and at an elevated temperature.
  • the polyamide in the regenerated PET forms small polyamide domains that scatter the light and thus additionally cloud the regenerated PET. It was therefore tried not to include PET bottles with polyamide in the recycling stream.
  • PET bottles can be laminated with labels or sleeves based on polystyrene or PET G, which cannot be completely separated, and which can lead to severe yellowing and sticking at the elevated temperatures. Also particularly critical are adhesives, paints and varnishes on the bottles, which cannot be separated from the regrind and which can lead to undesirable reaction products at elevated temperatures.
  • thermoplastics via their physical properties, such as near infrared absorption or density. After the separation, the essentially single-variety thermoplastic is washed and contaminations, such as paper or adhesive, are removed in the process. Basically, they are not changed when washing thermoplastics.
  • the thermoplastics are only cleaned of impurities and brought into a form that enables further processing or preparation, for example as flakes, which are usually 2 to 30 mm 2 in size as regrind. It is also known to dehumidify the flakes by heating them in vacuo or in a low-oxygen environment and thereby remove volatile contaminants.
  • thermoplastic materials in particular polyethylene terephthalate (PET)
  • PET polyethylene terephthalate
  • the quality of the processed thermoplastic should be improved to such an extent that this thermoplastic for plastic packaging can be used in particular for food, which packaging should convey a high quality impression. This impression of quality arises, for example, from beverage bottles due to high transparency.
  • thermoplastics of high quality enable the proportion of recycled thermoplastic to be increased further and accordingly the proportion of newly manufactured thermoplastics to be reduced in the manufacture of semi-finished products or plastic packaging.
  • the method according to the invention is intended to complement existing processing processes, to be as economical as possible and to take ecological history into account.
  • the invention makes use of the knowledge that different contaminations of the thermoplastic to be recycled, when exposed to elevated temperatures, specifically lead to different reactions, which release reaction products and / or can result in discoloration, yellowing or adhesive bonding.
  • the invention relates to a process for the preparation of thermoplastics intended for reuse in the form of flakes, which is characterized in that the flakes are subjected to an oxidative fluid under heat in a first step until contamination by chemical and / or change physical effects so that in a second step due to the
  • Chemical effects in the sense of the invention can be, for example, the formation of reaction products or the elimination of reaction products. Discoloration, yellowing, turbidity or agglomerates formed as a result of clumping represent, for example, physical effects in the sense of the invention.
  • the heating can take place directly by convection of the heated oxidative fluid, as well as indirectly by heat conduction, friction (sound) or radiation (microwave, UV, visible light, IR radiation).
  • the oxidative fluid can absorb and remove chemical contaminations that are already present, as well as those that only arise at elevated temperature.
  • solid contaminations are identified on the basis of the specific changes described above (for example discoloration, clumping) which take place on these and on the contaminated flakes during the process.
  • a first separation of solid contaminants according to the second step can be carried out by sieving technologies, which in particular screen out adhered contaminations or contaminations that have become brittle and crumbly as a result of the heat and oxidation treatment or have turned into dust.
  • Discolored (yellowed, greened, grayed) solid contaminations can be separated using conventional sorting systems from well-known manufacturers such as Sesotec, Tomra, Bühler or Pellenc. The separation preferably takes place while still hot, i.e. H. above 90 ° C. Here, solid contaminations are identified as such and separated.
  • the invention uses the CIELAB color model (also Lab colors, CIEL * a * b *) to identify discolorations.
  • the color of plastics is therefore determined by the three parameters L, a and b.
  • the parameters are represented as L, a, b or often also as L * a * b *.
  • the L * a * b * color space also: Lab colors, CIELAB, CIEL * a * b *
  • the most important features of the L * a * b * color model include device independence and perception-relatedness, which means that colors are defined regardless of how they are generated or reproduced, as they would be perceived by a normal observer in a standard lighting condition.
  • the color model is standardized in EN ISO 11664-4 "Colorimetry - Part 4: CIE 1976 L * a * b * Color space".
  • the application of the CIELAB color model is explained below.
  • the parameter L is a measure of the darkness. The higher the L value, the lighter the flakes. Flakes with values of L ⁇ 65 are very dark and rather gray, whereas flakes with values of L> 85 are light.
  • virgin PET newly manufactured PET without recycled content
  • L values below 85 that contains coal dust, IR absorbers or other additives that cloud the virgin PET.
  • the b-value is a measure of the yellow-blue discoloration of the flakes.
  • Yellowed flakes for example, have a b-value greater than 5 (b> 5,) which, for example, can reach values of b> 20 with strongly yellowed PET.
  • a negative b-value describes the degree of blue coloring of the flakes.
  • Virgin PET for example, has b values between -3 and 0.
  • the blue tint is generated via additives, for example cobalt compounds.
  • Virgin PET is set to a bluish tint, since it inevitably becomes more yellow during processing and the b-value thus increases.
  • the a value is a measure of the red-green discoloration of the flakes.
  • there is usually also a green discoloration of the regrind which is compensated with red color, and which also makes the regrind darker in the color compensation if the additive color mixture is intended to suppress the green tint.
  • the L-value drops, whereas the b-value increases.
  • the a-value tends to decrease to a comparatively small extent. Not only do the flakes become more yellow even during the recycling runs, but the yellow tinge is particularly enhanced by impurities which contaminate the flakes during a recycling cycle.
  • the method according to the invention is carried out after carrying out already generally known methods for processing flakes. Such processes are washing the flakes, for example in alkalis or cold sorting to separate contaminants such as metals and other plastics.
  • the contamination according to the invention is preferably separated from the other flakes before the extrusion and granulation.
  • the method according to the invention enables the polymer chain length to be increased to the level of the original raw material. It is optionally possible to carry out an SSP process in accordance with the process according to the invention in order to further increase the polymer chain lengths.
  • the discoloration of solid contaminations can be determined by means of one or more optical sensors and the discoloration can be assessed on the basis of the CIELAB color model explained above.
  • flakes that are well suited for the production of transparent or crystal-clear packaging are obtained when flakes with a clear red cast, i.e. are separated with a Color a value less than minus 4 and / or if flakes with a clear green tint, i.e. a Color a value less than 4 can be separated. Furthermore, the flakes should have a Color L value that is greater than 50 and thus flakes with a Color L value of less than 50 are separated according to the invention.
  • an air-gas mixture with an oxygen content of at least 5% can be used as the fluid.
  • solid contaminations such as mixtures of thermoplastics with a radical scavenger as well as adhesives, PVC and polystyrene can be separated.
  • an air-gas mixture with an oxygen content of at least 5% is used as the fluid and the flakes are heated in the range from 160 ° C to 240 ° C and preferably in the range from 175 ° C to 205 °, the particularly preferred temperature range being 185 ° C to 195 ° C.
  • the aim is to keep the temperature of the fluid essentially constant during the process, a fluctuation of + / 15 ° C. being acceptable in order to regulate the temperature in the reaction space.
  • the application of hot fluid to the flakes can take between 5 minutes and 10 hours.
  • the process conditions are thus selected such that the contaminations are forced to react and / or outgas during the implementation of the method and can be separated from the reaction space together with the oxidative fluid.
  • dehumidified or dried flakes with a temperature of 90 ° C. to 200 ° C. are preferably supplied. Therefore, in order to prevent Neukontamination in particular with steam, the fluid, in one embodiment of the invention in which feed a relative humidity in the order of 10- 6% and 10% to -2.
  • the supplied fluid is usually air and preferably has a dew point of -10 ° C to -100 ° C when it is supplied. This allows the flakes to be dried to a water content of less than 50 ppm while the fluid is flowing through them.
  • Contaminated flakes and agglomerates are separated or separated in one embodiment of the invention by sieving technologies, such as mechanical sorting methods.
  • the reason for the disturbance of the flowability of the flakes is usually the high temperatures.
  • the temperature profile during the process can be selected such that the thermoplastic crystallizes to more than 30% and preferably more than 40%.
  • the crystallization drives out contaminations that are poorly or not at all soluble in the crystallized PET.
  • Another advantageous aspect of the method according to the invention is that contaminations with a molecular mass less than 350 Da (Dalton) that have already migrated into the flakes due to forced reactions as a result of the exposure to the hot fluid and the presence of oxygen from the Migrate flakes into the fluid and can be easily separated from it.
  • the method according to the invention differs from previously known methods in that “contaminating” reactions are deliberately triggered in order to produce contaminations (yellowing, graying, benzene formation, phenol formation) in order then to separate them in a targeted manner.
  • Another advantageous aspect of the method according to the invention is that gaseous reaction products and other gases which arise during the implementation of the process or migrate from the flakes can be separated from the process together with the oxidative fluid and thus removed from the process and slipped off Contamination also reaction products and the other gases can be removed from the flakes.
  • the method according to the invention is preferably carried out with pre-sorted flakes. This means that, for example, only flakes of one type of plastic are treated in the process. If the flakes to be processed are made of polyethylene terephthalate (PET), apart from the solid contaminations and other impurities, no other thermoplastics are processed together with the flakes made of polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the process according to the invention is particularly suitable for the processing of flakes from polyethylene terephthalate (PET) and can also be used with great success for other thermoplastics, such as in particular for polyactides (PLA), polyethylene furanoate (PEF), polypropylene (PPF), high density polyethylene (HDPE) or polypropylene (PP) can be used.
  • PPA polyactides
  • PEF polyethylene furanoate
  • PPF polypropylene
  • HDPE high density polyethylene
  • PP polypropylene
  • PP polypropylene
  • the advantage of the method according to the invention is that solid contaminations are removed and other contaminants have already reacted due to the degradation reactions forced due to the high temperatures. As a result of the forced reaction and separation at high temperatures according to the invention, those prepared according to the invention arise during further processing
  • thermoplastics hardly any or only very few new contaminations. This is remarkable because every further processing always means a thermal load for the thermoplastics.
  • the use of the method according to the invention is particularly advantageous in the preparation of PET for bottles, preforms, tubes or other containers. This is because containers made from PET often undergo two transformations under the influence of high temperatures and are therefore exposed to multiple thermal loads during further processing.
  • Processes are treated, in the area of the CIELAB values, in particular in the area of the CIELAB b value, can be improved by about +5 to +10 points.
  • the invention also relates to a semifinished product or plastic packaging, in particular beverage bottles, which contain a thermoplastic, in particular polyethylene terephthalate (PET), which has been processed using the method according to the invention.
  • PET polyethylene terephthalate
  • a semifinished product or a plastic packaging with polyethylene terephthalate has a first proportion of at most 40% virgin polyethylene terephthalate (PET), preferably of at most 30% PET and particularly preferably at most 25% PET and a second proportion of at least 60% Polyethylene terephthalate (PET), preferably of at least 70% PET and particularly preferably at least 75% PET, which has been processed using the method according to the invention.
  • Flakes treated with the process according to the invention and thus the semi-finished products and plastic packaging produced therefrom preferably contain less than 0.3 ppm benzene, toluene or xylene.
  • the method according to the invention enables the production of flakes and thus of semi-finished products and plastic packaging which contain less than 0.03 ppm phenols, such as in particular bispehnol A or
  • Bispehnol S contains. These products are therefore suitable for use in the food sector for packaging food and beverages.
  • the method according to the invention can be carried out primarily in processing plants for processing thermoplastic intended for reuse, in particular polyethylene terephthalate (PET) in the form of flakes, the device for carrying out the method according to the invention being preceded by a washing device for washing the flakes from thermoplastics and another Process for the formation of a thermoplastic granulate can be connected downstream.
  • a device for carrying out a solid state polymerization process (SSP process) can be connected downstream.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

L'invention concerne un procédé de préparation de matières thermoplastiques destinées à être réutilisées, telles que, par exemple, du polyéthylène téréphtalate (PET) sous forme de flocons. Selon l'invention, les flocons sont exposés, au cours d'une première étape, à un fluide oxydant sous chaleur jusqu'à ce que les flocons contaminés se modifient et puissent être séparés des autres flocons en raison de leur modification au cours d'une seconde étape.
EP19755307.6A 2018-08-06 2019-08-06 Procédé de préparation de matières thermoplastiques destinées à être réutilisées Pending EP3833523A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00955/18A CH715231A1 (de) 2018-08-06 2018-08-06 Verfahren zur Aufbereitung von zur Wiederverwendung vorgesehenen Thermoplasten.
PCT/EP2019/071154 WO2020030657A1 (fr) 2018-08-06 2019-08-06 Procédé de préparation de matières thermoplastiques destinées à être réutilisées

Publications (1)

Publication Number Publication Date
EP3833523A1 true EP3833523A1 (fr) 2021-06-16

Family

ID=63490117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19755307.6A Pending EP3833523A1 (fr) 2018-08-06 2019-08-06 Procédé de préparation de matières thermoplastiques destinées à être réutilisées

Country Status (6)

Country Link
US (1) US11794378B2 (fr)
EP (1) EP3833523A1 (fr)
CN (1) CN112689555A (fr)
CH (1) CH715231A1 (fr)
MX (1) MX2021000840A (fr)
WO (1) WO2020030657A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112720928A (zh) * 2021-01-11 2021-04-30 宋晓莉 一种揉挤式橡胶鼠标垫回收装置
CN115895208A (zh) * 2022-11-23 2023-04-04 广州市聚赛龙工程塑料股份有限公司 一种含有pcr-pet薄膜材料的pet复合材料及其制备方法与应用
JP7626287B1 (ja) 2024-06-27 2025-02-04 ａｒｔｉｅｎｃｅ株式会社 再生ポリエステル樹脂の製造方法、それに用いられる液状着色樹脂組成物、及び成形体

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046825A (en) * 1974-05-15 1977-09-06 Mobil Oil Corporation Conversion of oxygenated compounds to gasoline
US5171308A (en) * 1990-05-11 1992-12-15 E. I. Du Pont De Nemours And Company Polyesters and their use in compostable products such as disposable diapers
US5232885A (en) * 1991-12-18 1993-08-03 Amoco Corporation Process for regenerating a spent resin hydroprocessing catalyst using a group IV metal
DE4333221B4 (de) * 1993-09-30 2006-05-04 Deutsches Textilforschungszentrum Nord-West E.V. Verfahren zum Entfärben von Substraten aus Kunststoff, insbesondere Synthesefasern
US5886058A (en) * 1997-02-03 1999-03-23 Illinois Tool Works Inc. Inline solid state polymerization of pet flakes for manufacturing plastic strap
US6111064A (en) * 1998-11-04 2000-08-29 The Regents Of The University Of California Pressure polymerization of polyester
DE19903700A1 (de) * 1999-01-30 2000-08-03 Tobias J Zimmermann Verfahren zum PET-Recycling mit Rapsölepoxid durch Herstellung eines duroplastischen Polyesters
JP2002086448A (ja) * 2000-09-13 2002-03-26 Mitsubishi Heavy Ind Ltd ポリエステルの再生方法
US20040140248A1 (en) * 2003-01-17 2004-07-22 Dauzvardis Matthew J. Plastic flake processing
US7592116B2 (en) * 2004-11-12 2009-09-22 Ricoh Company, Ltd. Indium-containing carrier for electrophotography, developer using the same, and developer container
US8748007B2 (en) * 2006-05-02 2014-06-10 Ppg Industries Ohio, Inc. Coating compositions exhibiting corrosion resistance properties, related coated articles and methods
ATE485145T1 (de) * 2007-10-23 2010-11-15 Retro Flex Ag Verfahren und anlage zur herstellung eines fügbaren granulats aus kunststoffschwerfolienabfällen und einer recycling-kunststoffschwerfolie mit verbesserten eigenschaften.
WO2009152114A1 (fr) * 2008-06-09 2009-12-17 Constar International, Inc. Procédés et produits destinés à améliorer la recyclabilité de récipients à base de désoxygénants
GB2492942A (en) * 2011-04-20 2013-01-23 Buhler Sortex Ltd Processing system and method
US20130261197A1 (en) * 2012-04-03 2013-10-03 Luigi Bacchiocchi Additive for Use in Wash Step of PET Recycling Process
US9193102B2 (en) * 2012-05-31 2015-11-24 Nike, Inc. Method of making and recycling a golf ball
US8969404B2 (en) * 2012-06-22 2015-03-03 Eastman Chemical Company Purifying crude furan 2,5-dicarboxylic acid by hydrogenation
US10450505B2 (en) * 2014-12-09 2019-10-22 Shin-Etsu Chemical Co., Ltd. Wavelength conversion member and light-emitting device

Also Published As

Publication number Publication date
MX2021000840A (es) 2021-03-09
CH715231A1 (de) 2020-02-14
CN112689555A (zh) 2021-04-20
WO2020030657A1 (fr) 2020-02-13
US11794378B2 (en) 2023-10-24
US20210316484A1 (en) 2021-10-14

Similar Documents

Publication Publication Date Title
EP3909736B1 (fr) Procédé de production de recyclats de polyoléfines
EP3634708B1 (fr) Bouteille en pet-barrière recyclé
WO2020030657A1 (fr) Procédé de préparation de matières thermoplastiques destinées à être réutilisées
DE602005004770T2 (de) Artikelverpackungen wie lichtundurchlässige flaschen und verfahren zu deren herstellung
DE69619246T2 (de) Verfahren zur herstellung von polyester gegenstände mit niedrigem acetaldehyd gehalt
DE102006023354B4 (de) Verfahren und Vorrichtung zur Wiederverwertung von Polyestermaterial
EP1917128B1 (fr) Procede et dispositif pour reduire la teneur en acetaldehyde d'un granulat de polyester
CH713339A1 (de) PET-Regranulat mit hoher intrinsischer Viskosität und Verfahren zu dessen Herstellung.
DE2907358C2 (de) Verfahren zur mechanischen Verarbeitung eines im geschmolzenen Zustand formbaren gesättigten Polyesters bei erhöhten Temperaturen
EP0828785A1 (fr) Plaque coloree transparente amorphe en thermoplaste cristallisable, son procede de fabrication et son utilisation
EP2260071B1 (fr) Procédé de fabrication d'un matériau polymère chargé
AT505475B1 (de) Verfahren und anlage zur erhöhung der grenzviskosität von polyestermaterial mittels festphasenpolykondensation
DE102004010680A1 (de) Verfahren zur Herstellung von hochkondensierten Polyestern in der festen Phase
DE2834162C2 (fr)
DE69121402T2 (de) Kunststoffmaterial und verfahren zur herstellung
EP4450546A2 (fr) Procédé et dispositif pour la fabrication et le traitement d'un mélange de polyester recyclé et d'un prépolymère polyester à partir d'un procédé de fabrication de polyester
AT525907B1 (de) Verfahren zur Bearbeitung von Polykondensaten
DE102011105037A1 (de) Verfahren zur Herstellung eines aufbereiteten Kunststoffmaterials
EP4180199A1 (fr) Procédé et dispositif de fabrication et de traitement d'un mélange de matière de polyester recyclé et d'un prépolymère de polyester à partir d'un processus de fabrication de polyester
WO2023180579A1 (fr) Procédé de coloration de polyesters, et composition de mélange maître associée
DE102019206481A1 (de) Holz-Kunststoff-Verbundwerkstoff, dessen Herstellung und Verwendung
WO2023078991A1 (fr) Matériau d'emballage imprimé offrant une meilleure aptitude au recyclage, matériau recyclé, procédé de recyclage et procédé d'estimation de l'aptitude au recyclage
WO2024200218A1 (fr) Procédé de recyclage de récipients en polyoléfine
DE202021106227U1 (de) Bedrucktes Verpackungsmaterial mit verbesserter Recyclingfähigkeit und ein daraus gebildetes Rezyklat
DE10019081A1 (de) Verfahren zur Aufbereitung von bunten und gemischten Polyester-Abfällen

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210303

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230922