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EP4377679A1 - Emballage en matière plastique recyclable ainsi que procédé et dispositif pour la récupération d'un tel emballage - Google Patents

Emballage en matière plastique recyclable ainsi que procédé et dispositif pour la récupération d'un tel emballage

Info

Publication number
EP4377679A1
EP4377679A1 EP22761065.6A EP22761065A EP4377679A1 EP 4377679 A1 EP4377679 A1 EP 4377679A1 EP 22761065 A EP22761065 A EP 22761065A EP 4377679 A1 EP4377679 A1 EP 4377679A1
Authority
EP
European Patent Office
Prior art keywords
container
plastic
sensor
molecule
electromagnetic radiation
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
EP22761065.6A
Other languages
German (de)
English (en)
Inventor
Robert Jansen
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.)
Dpg Deutsche Pfandsystem GmbH
Original Assignee
Dpg Deutsche Pfandsystem 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 Dpg Deutsche Pfandsystem GmbH filed Critical Dpg Deutsche Pfandsystem GmbH
Publication of EP4377679A1 publication Critical patent/EP4377679A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6408—Fluorescence; Phosphorescence with measurement of decay time, time resolved fluorescence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/3412—Sorting according to other particular properties according to a code applied to the object which indicates a property of the object, e.g. quality class, contents or incorrect indication
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
    • G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N2021/6417—Spectrofluorimetric devices
    • G01N2021/6419—Excitation at two or more wavelengths
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
    • G01N2021/6439—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" with indicators, stains, dyes, tags, labels, marks
    • G01N2021/6441—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" with indicators, stains, dyes, tags, labels, marks with two or more labels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents

Definitions

  • Container made of recyclable plastic and method and device for taking back such a container
  • the invention relates to a container made of plastic, which has a filling space bordered by a wall made of recyclable plastic for accommodating a filling, in particular a food or drink.
  • the invention also relates to a method for taking back such a pack and a device for taking back such a pack.
  • Containers made of recyclable plastic e.g. beverage bottles, yoghurt cups, thermoformed film packaging for cold cuts and the like are well known.
  • the various packaging can be made of various recyclable plastics such as polytetrafluoroethylene, polyethylene, polypropylene, etc. Most of the plastics are thermoplastics, which can be melted and processed into granules, which in turn can be used to manufacture new plastic products.
  • the plastics are often identified by corresponding abbreviations such as PET, PE, PP etc. embossed into the packaging, but reading such identifications is difficult if not impossible if the packaging is deformed or destroyed.
  • the object of the invention is to recognize containers made of recyclable plastic with regard to the plastic used and, if necessary, to sort them.
  • a container made of plastic is proposed to solve this problem, which as a component of the container has in particular a filling space bordered by a wall made of recyclable plastic for receiving a filling, in particular a foodstuff or drink.
  • the plastic that forms the part of the container has at least one molecule that can be excited electromagnetically—preferably several fluorescent color pigments—that targeted electromagnetic excitation causes a response signal that can be detected by a sensor and can be used to identify the at least one molecule and thus the plastic that forms the part of the container is.
  • a container can also have several components made of different plastics.
  • the different plastics also have different, electromagnetically excitable molecules, in particular different fluorescent color pigments, which themselves or their combination are characteristic of the respective type of plastic.
  • fluorescent color pigments are added to the different substrates (plastics from the bottle body and lid) during the production of a plastic beverage bottle, for example, and these are distributed homogeneously in the still liquid plastic.
  • a sort-specific differentiation according to the plastic substrate mixture can be carried out in a downstream process of waste collection and/or recycling using optical-physical methods.
  • the containers are guided past one or more radiation or light sources emitting electromagnetic radiation, in particular light, with one or more specific wavelengths, and the color pigments fp1, fp2, fp3, etc. are excited differently as a result.
  • the decay curve and/or constant of each individual pigment fp1, fp2, fp3, etc. can be determined using a camera.
  • the molecule is a fluorescent colored pigment.
  • the plastic particularly preferably has a combination of several different electromagnetically excitable molecules.
  • the plastic forming the wall preferably has a defined proportion of electromagnetically excitable molecules, which is between 0.1% and 1% of the mass.
  • the plastic that forms a part of the container preferably contains a combination of different electromagnetically excitable molecules, in particular different fluorescent color pigments, that is specifically predetermined for a type of plastic.
  • a label containing at least one electromagnetically excitable molecule analogous to the substrate mixture is preferably applied to the container. This allows the integrity of the combination of container and label to be checked using the at least one electromagnetically excitable molecule. It can thus be recognized if, for example, a counterfeit sticker is applied as a label to a container, which usually does not have the correct electromagnetically excitable molecule. In this context, it is also advantageous if the label has a product identification printed on it, which can serve as a further test criterion for an authenticity test.
  • Another aspect relates to a method for taking back and automatically sorting containers made of recyclable plastic, in which a container is introduced into an analysis room and exposed to electromagnetic radiation, in particular light of a specified wavelength or a specified wavelength range, and a response signal by means of a sensor, in particular an image sensor and the course of the sensor output signal detected by the sensor during and/or immediately after the container is exposed to electromagnetic radiation is evaluated with regard to the presence or absence of an electromagnetically excitable molecule in the plastic of the container.
  • electromagnetic radiation in particular light of a specified wavelength or a specified wavelength range
  • the device has a return space into which a container to be returned can be placed.
  • the device has a radiation source which is arranged and designed to apply electromagnetic radiation, in particular light, to a container placed in the return space.
  • a sensor is also provided, in particular an optical sensor which is arranged and controlled in such a way that it detects a response signal that may be emitted by the container during or immediately after the container introduced into the return space is exposed to electromagnetic radiation of the radiation wave and delivers a sensor output signal that represents this.
  • An evaluation unit is connected to the sensor and is designed to evaluate the sensor output signal detected by the sensor during and/or immediately after the container is exposed to electromagnetic radiation with regard to the presence or absence of an electromagnetically excitable molecule in the plastic of the container.
  • the device has a sorting unit which is arranged and designed to sort the containers to be taken back as a function of the sensor output signal detected by the sensor during and/or immediately after the container is exposed to electromagnetic radiation and evaluated by the evaluation unit.
  • Fig. 1 a device for taking back and sorting components of
  • a container 10 with container components made of plastic can be made of different plastics.
  • the bottle body 12 can be made of polyethylene terephthalate (PET) and the bottle cap 14 can be made of polyethylene (PE).
  • PET polyethylene terephthalate
  • PE polyethylene
  • Embossed abbreviations for the plastics (e.g. PET or PE) on the container components can refer to the plastic from which the respective component part of the container consists.
  • PET or PE polyethylene
  • the various plastics from which the various container components can be made should otherwise, namely by electromagnetically excitable mo- lekule, in particular fluorescent color pigments are marked.
  • a type of plastic can be identified in this way by a fluorescent color pigment or by a combination of different fluorescent color pigments.
  • Different color pigments can differ from other color pigments because they can be excited by light with different wavelengths or because the fluorescence caused by the excitation decays differently. Accordingly, when illuminated with light, different color pigments can excite a wavelength that can be specific to the respective color pigment.
  • the fluorescence caused by the excitation of a respective color pigment can be detected by means of an optical sensor, which can be part of a camera, and its decay can be analyzed.
  • a container component with plastic that contains color pigments is briefly illuminated with light of a specific wavelength that is suitable for exciting the fluorescence of one or more color pigments, the excited fluorescence occurs. However, this fades away after the excitation.
  • the intensity when the fluorescence decays typically follows a decay curve that is characteristic of the respective color pigment.
  • the presence of a specific color pigment can thus be detected on the basis of the course of the decay curve and the excitation wavelength used.
  • it is also possible to detect several different color pigments that a plastic can contain It is therefore possible to identify a specific plastic and a specific type of plastic by adding a color pigment or a characteristic, predetermined combination of color pigments.
  • the device 100 shown in FIG. 1 can be used for this purpose, for example, which has a receiving space 102 into which the container 10 can be introduced.
  • a conveyor device 104 for conveying the container can be located in the receiving space 102 .
  • two different lighting devices 106.1 and 106.2 are provided in the receiving space 102, with which the container 10 can be illuminated with different excitation wavelengths.
  • the plastic from which the bottle body 12 of the container 10 is made contains corresponding fluorescent color pigments
  • their fluorescence can be excited by means of the lighting units 106.1 and/or 106.2.
  • a sensor 108 is provided which, in addition to an opto-electrical converter (the actual sensor; not shown in detail), can also have an optical system 110 .
  • the intensity of the excited fluorescence and its progression over time can then be detected by means of the sensor 108 in order to be able to determine the decay curve of the fluorescence and assign it to a specific fluorescent color pigment that may be present.
  • FIG. 2 shows a sketch of two different decay curves that can be assigned to two different fluorescent color pigments.
  • the excitation can take place with different wavelengths that are precisely matched to the color pigments provided for marking the plastic or the type of plastic.
  • This means that the two decay curves shown in Figure 2 represent two different florescences that can be excited by two different waves (but can also be caused by one and the same wavelength or by broadband excitation.
  • a sensor output signal from sensor 108 thus represents the intensity curve of a
  • the sensor output signal can be evaluated by an evaluation unit 112 with regard to the decay behavior of the fluorescence, in particular with regard to the decay constant, in order in this way to be able to detect the presence of a specific fluorescent color pigment or a combination of specific fluorescent color pigments different plastics are identified and container components are sorted with regard to the plastic used play is represented by a pivot wedge 114, which can be controlled by the evaluation unit 112.
  • the pivoting wedge 114 can be pivoted in one direction or the other in order to convey a container emerging from the receiving space 102 either in one direction or the other and in this way to sort different container components depending on the material used.
  • the container shown in FIG. 1 has two components made of different plastic, namely the bottle body made of PET and the bottle cap made of PE.
  • these two components of the pack 10 should be introduced individually into the receiving space 102 and not in the connected state that is indicated in FIG.

Landscapes

  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Optics & Photonics (AREA)
  • Molecular Biology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

L'invention concerne un emballage en matière plastique qui présente, en tant que constituant de l'emballage, notamment une chambre de remplissage entourée par une paroi en matière plastique recyclable, destinée à recevoir un produit de remplissage, en particulier un produit alimentaire ou une boisson. La matière plastique formant le constituant de l'emballage comporte au moins une molécule pouvant être excitée par voie électromagnétique, de préférence plusieurs pigments de couleur fluorescents, de telle sorte que, lors d'une excitation électromagnétique ciblée, un signal de réponse est produit, lequel peut être détecté par un capteur et permet à l'au moins une molécule, et ainsi à la matière plastique formant le constituant de l'emballage, d'être identifiées.
EP22761065.6A 2021-07-28 2022-07-28 Emballage en matière plastique recyclable ainsi que procédé et dispositif pour la récupération d'un tel emballage Pending EP4377679A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021119662.0A DE102021119662A1 (de) 2021-07-28 2021-07-28 Gebinde aus rezyklierbarem Kunststoff sowie Verfahren und Vorrichtung zum Zurücknehmen eines solchen Gebindes
PCT/EP2022/071252 WO2023006901A1 (fr) 2021-07-28 2022-07-28 Emballage en matière plastique recyclable ainsi que procédé et dispositif pour la récupération d'un tel emballage

Publications (1)

Publication Number Publication Date
EP4377679A1 true EP4377679A1 (fr) 2024-06-05

Family

ID=83115331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22761065.6A Pending EP4377679A1 (fr) 2021-07-28 2022-07-28 Emballage en matière plastique recyclable ainsi que procédé et dispositif pour la récupération d'un tel emballage

Country Status (3)

Country Link
EP (1) EP4377679A1 (fr)
DE (1) DE102021119662A1 (fr)
WO (1) WO2023006901A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024125792A1 (fr) * 2022-12-15 2024-06-20 Robert Bosch Gmbh Objet en plastique et dispositif et procédé de détermination d'un type de matériau de l'objet en plastique

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508388A1 (de) 1995-03-09 1996-09-12 Rietscher Hans Joachim Mehrwegsystem mit Mehrweggefäßen, insbesondere Mehrwegbechern und einem Rücknahmeautomat
GB2330409A (en) * 1997-10-17 1999-04-21 Univ Cranfield Identifying plastics for recycling
GB2330408A (en) * 1997-10-17 1999-04-21 Pira International Fluorescent tracers
AU2972300A (en) 1999-01-28 2000-08-18 Crown Cork & Seal Technologies Corporation Method of sorting and verifying type of plastic containers
DE10138439A1 (de) 2001-03-30 2002-10-10 Klaus Rudolph Vorrichtung zum Sortieren und/oder Sammeln von Materialien und ein Verfahren zum Betreiben einer derartigen Anlage
DE102006056103A1 (de) * 2006-11-24 2008-05-29 Siemens Ag Verfahren und Vorrichtung zur Materialflussüberwachung in Herstellungsprozessen von Baugruppen oder Bauteilen, die Kunststoff enthalten
DE102012002678A1 (de) * 2012-02-09 2013-08-14 Heinz Langhals Eine einstufige Synthese von Perylen-3,4-dicarbonsäureanhydrid
DE102017108641A1 (de) * 2017-04-24 2018-10-25 Polysecure Gmbh Verfahren zum Identifizieren von Pfandgut
DE102016214496A1 (de) * 2016-08-04 2018-02-08 Gunther Krieg Vorrichtung zur Identifikation von Stoffen
PL421008A1 (pl) 2017-03-27 2018-10-08 Ergis Spółka Akcyjna Materiał powłokowy do znakowania tworzyw sztucznych, sposób znakowania tworzyw sztucznych, sposób identyfikacji znakowanych tworzyw sztucznych oraz ich zastosowanie do sortowania odpadów z tworzyw sztucznych
DE102017118601A1 (de) * 2017-08-15 2019-02-21 Tailorlux Gmbh Sortierverfahren für Verpackungsmaterialien

Also Published As

Publication number Publication date
WO2023006901A1 (fr) 2023-02-02
DE102021119662A1 (de) 2023-02-02

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