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WO2025003922A1 - Constructions sans fil recyclables - Google Patents

Constructions sans fil recyclables Download PDF

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Publication number
WO2025003922A1
WO2025003922A1 PCT/IB2024/056233 IB2024056233W WO2025003922A1 WO 2025003922 A1 WO2025003922 A1 WO 2025003922A1 IB 2024056233 W IB2024056233 W IB 2024056233W WO 2025003922 A1 WO2025003922 A1 WO 2025003922A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
recyclable construction
adhesive
pressure sensitive
recyclable
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
PCT/IB2024/056233
Other languages
English (en)
Inventor
Eric Bartholomew
Mathieu DE BACKER
Antti Valtonen
Kati VITIKKALA
Noam ASSAEL
Kelly P. KELL
Alex NYARKO
Jennifer LOFTON
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.)
Avery Dennison Retail Information Services LLC
Original Assignee
Avery Dennison Retail Information Services LLC
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 Avery Dennison Retail Information Services LLC filed Critical Avery Dennison Retail Information Services LLC
Publication of WO2025003922A1 publication Critical patent/WO2025003922A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/334—Applications of adhesives in processes or use of adhesives in the form of films or foils as a label
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
    • C09J2301/502—Additional features of adhesives in the form of films or foils characterized by process specific features process for debonding adherents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/006—Presence of polyolefin in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00—Presence of (meth)acrylic polymer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • G06K19/0776—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag the adhering arrangement being a layer of adhesive, so that the record carrier can function as a sticker

Definitions

  • the present invention generally relates to recyclable wireless constructions, and methods of making and methods of using the recyclable constructions.
  • Wireless inlays are utilized on and in a wide range of objects, for various uses.
  • wireless inlays for example ultra-high frequency (UHF), near field communication (NFC), bluetooth low energy (BLE), long term evolution (LTE), and electronic article surveillance (EAS) inlays.
  • UHF ultra-high frequency
  • NFC near field communication
  • BLE bluetooth low energy
  • LTE long term evolution
  • EAS electronic article surveillance
  • the type of inlay selected depends on the desired use.
  • RFID inlays are commonly used on articles to be tracked.
  • tracking is often used to help businesses determine when they need to restock a particular product, or to keep track of where specific items of inventory are located.
  • plastic is typically used in product packaging, and many products are themselves made of plastic. To mitigate their negative effect on the environment, plastic articles are often recycled. To achieve this, the articles are sorted, shredded into flakes, washed, and dried. During the washing process, heavier materials sink in the washwater, while lighter materials float.
  • wireless inlays are typically not recyclable, as they are unable to go through plastic recycling waste streams.
  • wireless inlays include an antenna and, for intelligent inlays such as RFIDs, a chip, attached to a support (typically a polyethylene terephthalate (PET) support).
  • a pressure sensitive adhesive can be applied to the support, thereby enabling the inlay to be adhered to an article.
  • a large proportion of plastic articles, such as for example plastic bottles, plastic containers, and plastic packaging are made of the same material as the wireless inlay support.
  • the plastic recycling process includes the separation of materials having different densities.
  • PET films are highly preferred as the material for inlay carriers, for a variety of reasons.
  • PET has dimensional stability, which ensures that the antenna and any adhesive adhering the antenna to the support will be precisely placed on the PET support, without stretching of the PET during processing.
  • the inlay antenna is typically an aluminum that has been deposited on the PET, for example by printing or etching, or by deposition on an adhesive, followed by die cut or laser cutting.
  • the precise placement of the adhesive, and of the antenna on the PET support is extremely important for the proper functioning of the wireless device.
  • the dimensional stability and heat stability of PET ensures that the PET support will not stretch or shrink, ensuring that the antenna, and if present, the adhesive, will remain precisely oriented during their deposition on the PET support.
  • PET is non-toxic, and is a good barrier material, which is makes it suitable for use for food applications.
  • foam or heat shrinkable films as RFID supports.
  • foam suffers from the disadvantages of having a lower dimensional stability, a higher cost, and greater processing difficulty than PET.
  • foam supports typically have a thickness of at least 500 pm, which is larger than PET supports, making them too bulky for many applications, such as labels.
  • the size of heat shrinkable carriers is limited with regard to the size of antenna that can be used with the specific carrier, and if one departs from these limitations, the performance of the antenna will be negatively affected.
  • the invention relates generally to compositions and methods for removing labels from articles to be recycled.
  • the invention is directed to a recyclable construction
  • a recyclable construction comprising: a first carrier having a first surface and a second surface, wherein the first carrier comprises a heat stable polymeric film having a density of less than 1 g/cubic centimeter; a wireless identification device, having a first surface and a second surface, disposed on at least a portion of one of the first surface and the second surface of the first carrier; and a pressure sensitive adhesive, having a first surface and a second surface, wherein the pressure sensitive adhesive is capable of bonding the recyclable construction to a substrate, and capable of debonding from the substrate.
  • the invention is directed to a method of making the recyclable construction of the first aspect comprising the steps of: providing the first carrier, disposing the wireless identification device on at least a portion of one of the first surface and the second surface of the first carrier, and disposing the pressure sensitive adhesive on an outer layer of the recyclable construction.
  • the invention is directed to a method of recycling the recyclable construction of the first aspect, comprising the steps of: providing the recyclable construction bonded to the substrate of an article; subjecting the article to mechanical recycling conditions, thereby debonding the pressure sensitive adhesive from the article; and recovering the debonded recyclable construction.
  • FIG. 1 illustrates an exemplary embodiment of a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 2 illustrates an exemplary embodiment of a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 3 illustrates an exemplary embodiment of a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 4 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 5 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 6 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 7 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 8 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 9 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 10 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 11 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 12 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 13 illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 14a illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 14b illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • FIG. 14c illustrates a side view of a recyclable construction according to aspects of the disclosure.
  • the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended as open-ended and cover a non-exclusive inclusion.
  • a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • use of "a” or “an” is employed to describe elements and components described herein. This is done merely for convenience and to give a general sense of the scope of the invention. This description should be read to include “one” or “at least one” and the singular also includes the plural, unless it is obvious that it is meant otherwise by the context.
  • article means an item or object.
  • suitable examples of articles used in the context of this invention include, but are not limited to packaging articles, such as for example containers, bottles, clam shell containers, flexible packaging containers, food containers, and non-food containers.
  • wireless identification device means a device that utilizes wireless technology to communicate with another device. Examples include ultra-high frequency (UHF), near field communication (NFC), bluetooth low energy (BLE), long term evolution (LTE), and electronic article surveillance (EAS) inlays.
  • Wireless identification devices can be passive or active. Passive devices do not include an internal power source, and are powered by electromagnetic energy transmitted from a reader. Different types of passive tags operate on different frequencies. Active devices include an internal power source, and continuously broadcast their own signal.
  • integrated circuit or "chip” means a piece of hardware that is designed to implement one or more functions.
  • Integrated circuits or chip can form, for example, a sensor or a transmission-reception device, have a data or memory processing capacity, and other functions.
  • Integrated circuits or chips typically have a planar structure (whose overall shape is usually that of a small plate), include one or more semiconductor materials (as well as other materials, in particular metallic materials and/or electrically insulating oxides), and can integrate various components, active or passive (for example transistor, diode, resistor, radiating or guiding structure).
  • conductive means able to conduct electricity or induce electrical currents.
  • Conductive materials as used herein means materials that are able to conduct electricity or induce electrical currents.
  • the term "antenna” means a structure used to transmit or receive electromagnetic waves.
  • the term "carrier” means a layer of polymeric film material optionally containing a release coating, to which a wireless identification device can be attached.
  • the carrier has two sides, including a side that is outward facing and that can receive a wireless identification device directly or by adhesion, and the other side that can receive a pressure sensitive adhesive.
  • the thickness of the carrier typically ranges from 12 pm to 200 pm. In some embodiments, the carrier has a thickness of 12 pm to 150 pm, 12 pm to 100 pm, 12 pm to 50 pm, no more than 200 pm, no more than 150 pm, no more than 100 pm, or no more than 50 pm.
  • pressure sensitive adhesive refers to a material that may be identified by the Dahlquist criterion, which defines a pressure sensitive adhesive as an adhesive having a one second creep compliance of greater than lxlO -6 cm 2 /dyne as described in Handbook of PSA Technology, Donatas Satas (Ed.), 2 nd Edition, page 172, Van Nostrand Reinhold, New York, N.Y., 1989. Since modulus is, to a first approximation, the inverse of creep compliance, pressure sensitive adhesives may also be defined as adhesives having a Young's modulus of less than lxlO 6 dynes/cm 2 .
  • Another well-known means of identifying a pressure sensitive adhesive is an adhesive that is aggressively and permanently tacky at room temperature and firmly adheres to a variety of dissimilar surfaces upon mere contact, without the need of more than finger or hand pressure, and which may be removed from smooth surfaces without leaving a residue, as described in Glossary of Terms Used in the Pressure Sensitive Tape Industry provided by the Pressure Sensitive Tape Council, 1996.
  • a suitable pressure sensitive adhesive preferably has a room temperature storage modulus within the area defined by the following points as plotted on a graph of modulus versus frequency at 25°C: a range of moduli from about 2xl0 5 to 4xl0 5 dynes/cm 2 at a frequency of about 0.1 radians/sec (0.017 Hz), and a range of moduli from about 2xl0 6 to 8xl0 6 dynes/cm 2 at a frequency of approximately 100 radians/sec (17 Hz). See, for example, Handbook of PSA Technology (Donatas Satas, Ed.), 2 nd Edition, page 173, Van Nostrand Rheinhold, N.Y., 1989.
  • Permanent adhesive refers to an adhesive that is not easily removable without total or partial destruction of the construction of which it is a part. Permanent adhesives present adhesion values greater than 230 N/m, based on FINAT (Federation Internationale des yields et transformateurs d'Adhesifs et Thermocollants sur papiers et herb supports (International Federation of Manufacturers and Converters of Adhesives and Iron-Ons on Paper and Other Supports)) Test Method 1 - Peel adhesion (180°) at 300 mm/minute.
  • Any suitable permanent adhesive can be used, such as for example an acrylic emulsion based, acrylic solvent based, acrylic hot melt, acrylic UV based or rubber hot melt adhesive.
  • suitable permanent adhesives are FassonTM S7000, FassonTM S692N, MulticycleTM M7500, FassonTM S8029, and TruecutTM S2550 adhesive, each of which is available from Avery Dennison Corporation (located in Ohio, USA), and Aquence AV 7595 (available from Henkel Corporation, located in Connecticut, USA).
  • wash-off adhesive also “washoff adhesive” or “wash off adhesive” means an adhesive having a chemistry that enables the adhesive to dissolve, dissociate, or release from an underlying polymer, or plastic, surface under typical mechanical recycling conditions (e.g., a caustic wash utilizing NaOH) without the need for further processing steps to render the underlying polymer, or plastic, packaging article suitable for a circular recycling stream that does not downgrade the material.
  • Any suitable wash-off adhesive may be used, such as for example a synthetic polymer based adhesive (for example an acrylic or rubber hotmelt adhesive), or a bioderived adhesive.
  • wash-off adhesives examples include the Henkel Re adhesives, such as for example Loctite Liofol LA 4220 RE/Loctite Liofol LA 3180 RE, a two-component adhesive system, and Aquence PS 3682 (each commercially available from Henkel Corporation, located in Connecticut, USA), the CleanflakeTM adhesives, such as for example S3010, S7000 ER, S7400 ER and S692N ER (commercially available from Avery Dennison Corporation, located in Ohio, USA), and FlexcrylTM ClearCycle 1000 (commercially available from Bostik, located in France).
  • Henkel Re adhesives such as for example Loctite Liofol LA 4220 RE/Loctite Liofol LA 3180 RE
  • Aquence PS 3682 each commercially available from Henkel Corporation, located in Connecticut, USA
  • the CleanflakeTM adhesives such as for example S3010, S7000 ER, S7400 ER and S692N ER (commercial
  • a “dissolvable coating” means a coating composition that is capable of being dissolved in a solute.
  • a dissolvable coating is capable of becoming incorporated into a liquid (such as for example water or water-based liquids) so as to form a solution.
  • the dissolvable coating may be tacky (such as a dissolvable adhesive as described herein-below), or it may be inherently non-tacky and/or non-pressure sensitive.
  • Any suitable dissolvable coating may be used, such as for example water soluble coatings such as polyvinyl alcohols. Examples of commercially available dissolvable polyvinyl alcohol coating include the S1500 Series polyvinyl alcohols (available from SNP, Inc., located in North Carolina, USA).
  • a "dissolvable adhesive” means a tacky or pressure sensitive composition that is capable of being dissolved in a solute.
  • the dissolvable adhesive is a type of dissolvable coating.
  • a dissolvable adhesive is capable of becoming incorporated into a liquid so as to form a solution.
  • Any suitable dissolvable adhesive may be used, such as for example a synthetic polymer based (for example an acrylic adhesive), or a bioderived adhesive.
  • Examples of commercially available dissolvable adhesives include Herma Adhesive 62P adhesives, such as for example product codes 16820, 16822, 16889, 16909 and 16958 and the 62RPW and 52W adhesives (available from Herma Company, located in Germany), and WX6030, WW2031 and WW4031 adhesives (available from Henkel Corporation, located in Ohio, USA).
  • debonding as related to an adhesive, means no longer adhering or sticking to an adherend or substrate material to which an adhesive was attached, while “debondable” means capable of no longer adhering or sticking to an adherend or substrate material to which an adhesive was attached.
  • An “adhesive that is capable of debonding” or “configured for debonding” can be capable of debonding by any suitable means. For example, it may be a wash-off adhesive that debonds due to being washed off, or it may be a dissolvable adhesive that debonds due to dissolving in a solution.
  • bioderived refers to derived from biological sources, such as for example animal protein, such as for example casein.
  • film refers to an object that has one dimension (thickness) that is relatively small compared to the other two dimension (length and width).
  • the surface of a film defined by its length and width is also known as the "face” of the film (or as a first face and second face).
  • heat stable film means a film meets the ASTM Standard D1204 for dimensional stability, and under the ASTM Standard D1204 test conditions, experiences a shrinkage of no more than 0.5% in the machine direction, and no more than 0.5% in the cross direction.
  • heat shrinkable film means a film that is stretched and, or oriented during production, and shrinks or reduces in size, thereby losing its structure, upon exposure to heat at or above a certain shrink inducing temperature. Built in stresses in the heat shrinkable film remain stable until a certain level of heat energy is applied. Upon application of this thermal energy, the in-built stresses are released, causing the transitioning of the film from a stretched state, to an unstretched state. Heat shrinkable films will shrink when exposed to heat during the recycling wash process, and thereby detach from an article to which they are attached.
  • copolymer is used herein to refer to polymers containing copolymerized units of at least two different monomers (e.g., a dipolymer).
  • biaxially oriented polypropylene or "BOPP” means a film or laminate that has been stretched in both the machine direction (MD), and cross (CD) or traverse direction (TD).
  • (meth)acryl- refers to both “methacryl-” and “acryl-”, such as in “(meth)acrylic” (meaning both methacrylic and acrylic), “(meth)acrylate” (meaning both methacrylate and acrylate), and “(meth)acrylonitrile” (meaning both methacrylonitrile and acrylonitrile).
  • (meth)acrylate refers to monomeric acrylic or methacrylic esters of alcohols. Acrylate and methacrylate monomers are referred to collectively herein as “(meth)acrylate” monomers. Polymers prepared from (meth)acrylate monomers are referred to as (meth)acrylate polymers.
  • the term "acrylic polymer” refers to at least one (meth)acrylate homopolymer or copolymer and may include a blend of different (meth)acrylate polymers and copolymers.
  • the phrase "densified” means made more dense, for example, by the addition of a material having a density greater than that of the substance to which it is added.
  • de-densified means made less dense, for example, by the addition of a material having a density less than that of the substance to which it is added, or by the introduction of voids within a material.
  • filler refers to particles or fibers added to polymeric compositions to improve or change properties (such as density, tensile strength, toughness, heat resistance, color, and clarity), provide a cost advantage, or a combination thereof. Fillers can be more dense or less dense than the materials to which they are added, depending on the filler. Typical fillers include, but are not limited to, calcium carbonate (ground or precipitated), kaolin, talc, carbon black, and the like.
  • pigment is meant herein an organic, inorganic or synthetic substance that imparts whiteness or color, especially a powdered substance that can be mixed with a liquid in which it is relatively insoluble and that is typically used to impart color to coating materials (such as paints) or to polymers, inks, plastics, and rubber.
  • the phrase "liner” means a film sheet (typically paper such as kraft or glassine, or polymeric film such as PET or polyolefin, usually applied during the manufacturing process, used to prevent a sticky surface from prematurely adhering to a substrate. It is coated on one or both sides with a release agent, which provides a release effect against any type of a sticky material, such as an adhesive or a mastic.
  • the release agent may be applied at a coating level of 0.5-3 gsm.
  • gsm means grams per square meter.
  • a “caustic” means a highly basic or alkali compound.
  • examples include alkali metal hydroxides (such as for example a NaOH, KOH, and LiOH).
  • a “surfactant” means a substance having both hydrophilic and hydrophobic characteristics, and which, when added to a liquid, reduces the surface tension of that liquid.
  • conventional wireless inlays are typically not recyclable.
  • PET the conventionally preferred wireless inlay support
  • RFIDs which conventionally have a PET support
  • the article to be recycled is ground into flakes, which are then placed in a heated washwater, typically including a caustic or surfactant. The heavier flakes will sink, while the lighter flakes will float in the washwater.
  • both the flakes of the inlay support and the flakes of the article to which the inlay is attached are made of the same material, then all of the flakes will sink or float, depending on their density, making their separation by a sink-float method impossible.
  • both the flakes of the inlay support and the flakes of the article to which the inlay is attached are made of the PET, then all of the flakes will float, making their separation by sink-float impossible. Accordingly, it is not possible to separate the flakes having an antenna attached to their surface from the flakes that are antenna-free. This is disadvantageous, as a key requirement of the process of recycling articles is sorting materials by type, and recovering clean article flakes for processing into a new article.
  • the wireless inlay should be able to be separated from the article to which the inlay is attached.
  • the present invention generally relates to recyclable wireless inlay constructions, and methods of making and methods of using the recyclable constructions.
  • the recyclable construction includes a first carrier, a wireless identification device, and a pressure sensitive adhesive.
  • the first carrier has a first surface and a second, oppositely directed surface.
  • the first carrier is a heat stable polymeric film. In some embodiments, the first carrier is not a heat shrinkable film.
  • the heat stable polymeric film has a density of less than 1 g/cubic centimeter.
  • the polymeric film having a density of less than 1 g/cubic centimeter can be separated, in a recycling sink-float process, from an article to which the construction is attached, having a density of greater than 1 g/cubic centimeter, as the less dense polymeric film will float in the washwater, while the more dense article will sink.
  • the polymeric material having a density of less than 1 g/cubic centimeter can be made of any suitable material.
  • the polymeric film having a density of less than 1 g/cubic centimeter is a polyolefin.
  • the polyolefin is at least one of a polypropylene and a polyethylene.
  • the polypropylene is a biaxially oriented polypropylene (BOPP).
  • the polymeric material is not a foam.
  • the heat stable polymeric film has a density of greater than 1 g/cubic centimeter.
  • the polymeric film having a density of greater than 1 g/cubic centimeter can be separated, in a recycling sink-float process, from an article to which the construction is attached, having a density of less than 1 g/cubic centimeter, as the more dense polymeric film will sink in the washwater, while the less dense article will float.
  • the polymeric material having a density of less than 1 g/cubic centimeter can be made of any suitable material, as is described herein-below.
  • the polymeric film is not a polyester.
  • the polymeric film is not a polyethylene terephthalate.
  • the recyclable construction may include any suitable wireless identification device, several of which are readily commercially available.
  • the wireless identification device has a first surface and an oppositely directed second surface, disposed on at least a portion of the first surface of the first carrier.
  • Wireless identification devices are well known in the art. They include a conductive material that serves as an antenna for the device.
  • the conductive material is a conductive ink. Any suitable conductive ink can be used. Many conductive inks are readily commercially available. After being laid down or printed, the conductive ink forms a printed object that is capable of conducting electricity.
  • the wireless identification device is formed by printing a conductive ink onto the carrier, in the shape of an antenna.
  • the conductive ink can include any suitable conductive material, for example, in some embodiments, the conductive ink includes at least one of a copper, silver, carbon, platinum, gold, palladium, ruthenium, nickel, zinc, an alloy of any of the foregoing, graphene or carbon nanotubes.
  • the conductive material is etched onto the carrier.
  • the conductive material is adhered to the carrier.
  • the wireless identification device is adhered to the carrier by a first permanent adhesive. Any suitable permanent adhesive can be used, such as for example an acrylic emulsion based, acrylic solvent based, acrylic hot melt, acrylic UV based or rubber hot melt adhesive.
  • the first permanent adhesive is an acrylic emulsion based adhesive. In some embodiments, the first permanent adhesive is not a hot melt adhesive. In some embodiments, the first permanent adhesive is deposited on at least a portion of the carrier in the shape of an antenna. In some embodiments, the conductive material is deposited onto at least a portion of the surface of the first permanent adhesive.
  • the conductive material that is deposited onto at least a portion of the surface of the first permanent adhesive has the same, or substantially the same shape and size as the first permanent adhesive. In some embodiments, the conductive material that is deposited onto at least a portion of the surface of the first permanent adhesive has a larger size than the first permanent adhesive. In some embodiments, the conductive material that is deposited onto at least a portion of the surface of the first permanent adhesive has a larger area than the first permanent adhesive. In some embodiments the conductive material is then die cut or laser cut, or both, so that the resulting conductive material has the same, or substantially the same shape and size as the underlying first permanent adhesive. In some embodiments the conductive material is die cut. In some embodiments the conductive material is laser cut.
  • the wireless identification device includes only a conductive material that functions as an antenna.
  • the wireless identification device includes a conductive material connected to an integrated circuit or chip.
  • the integrated circuit is directly attached to the conductive material.
  • the wireless identification device further includes a strap, also known as an interposer.
  • the integrated circuit is coupled to strap leads (also known as interposer leads), forming a strap that is then coupled to the conductive material, as is described, for example in US6940408B2 and US8072333B2, herein incorporated by reference. These leads provide a larger effective electrical contact area than integrated circuits precisely aligned for direct placement without a strap.
  • the strapin includes a polymeric film having a density of less than 1 g/cubic centimeter. In some embodiments, the polymeric film having a density of less than 1 g/cubic centimeter is a polyolefin. In some embodiments, the polyolefin is at least one of a polypropylene and a polyethylene. In some embodiments, the polypropylene is a biaxially oriented polypropylene (BOPP). In some embodiments, the polymeric film of the strap is a cavitated film.
  • the strap is a film that has been cavitated by at least one cavitating agent in the film.
  • cavitating agent is meant herein at least one particle that induces micro-voids in a material. The presence of the cavitating agent in the carrier during the orientation of the film induces micro-voids. With a high degree of voiding, the film density can be reduced accordingly. Any suitable cavitating agent can be used.
  • the cavitating agent is a void-initiating particle including at least one of an organic polymer or an inorganic material.
  • the cavitating agent is a void-initiating particle including an organic polymer, such as for example, a polyamide, (such as for example, nylon-6), a polyester (such as for example polybutylene terephthalate (PBT)), an acrylic resin, or combinations thereof.
  • the cavitating agent is a void-initiating particle including an organic polymer, such as for example cyclic olefin polymers, cyclic olefin copolymers, ethylene norbornene copolymers, or combinations thereof.
  • the cavitating agent is a void-initiating particle including an inorganic polymer, such as for example, a glass, metal, ceramic, silica, calcium carbonate (CaCO3), clay, talc, or combinations thereof.
  • at least a portion of the film layer is an oriented polypropylene (PP) film, and the cavitating agent is a beta-nucleating PP.
  • at least one non-cavitated skin is disposed on at least one face of the cavitated film.
  • the cavitated film is sandwiched between two non-cavitated skins. The non-cavitated film provides support to the cavitated film.
  • the cavitated film is a cavitatated PET film.
  • the wireless identification device is an RFID device.
  • RFID tags can retain and transmit enough information to uniquely identify individuals, packages, inventory and the like.
  • RFID tags and labels also can be characterized as those to which information is written only once (although the information may be read repeatedly), and those to which information may be written during use.
  • the wireless identification device is a RFID passive device that does not include a power source.
  • a "base station” or “reader” sends an excitation signal to the wireless identification device to wake up the device. The excitation signal energizes the wireless identification device, and the RFID circuitry transmits the stored information back to the reader.
  • the "reader” receives and decodes the information from the wireless identification device.
  • the wireless identification device is an active RFID device that does include a power source.
  • the wireless identification device is selected from a ultra-high frequency device (UHF), a near field communication device (NFC), a bluetooth low energy device ( BLE) a long term evolution device (LTE) and an electronic article surveillance (EAS) device.
  • UHF devices are passive RFID devices that use a frequency ranging of about 865 MHz to 928 MHz. This frequency range provides long read distances.
  • the wireless identification device is not an RFID device.
  • the wireless identification device is an NFC device.
  • NFC devices are passive devices that typically use a smartphone or tablet that has NFC capabilities. Read ranges for NFC devices are short, typically no more than 1.6 inches.
  • the wireless identification device is a BLE device.
  • BLE devices are passive devices that use the same radio wavebands as Bluetooth (about 2.402GHz to 2.48GHz) and provide a read range of about 100 meters.
  • the wireless identification device is an LTE device, also known as a 4G device. LTE devices are used in devices for communication with a wireless cellular networks (uses 450 MHz - 3.8 GHz).
  • the recyclable construction further includes a pressure sensitive adhesive.
  • the PSA has a first surface and an oppositely directed second surface. In some embodiments, the PSA is disposed on at least a portion of the wireless identification device. In some embodiments, the PSA is disposed on at least a portion of at least one of the first surface and second surface of the wireless identification device. In some embodiments, the PSA is disposed on all or substantially all of the first surface of the wireless identification device. In some embodiments, the PSA is disposed on all or substantially all of the second surface of the wireless identification device.
  • the pressure sensitive adhesive is capable of bonding the recyclable construction to a substrate. Further, in some embodiments, the PSA is capable of debonding from the substrate.
  • the PSA is capable of debonding from the substrate to which the recyclable construction has been applied, upon subjection to mechanical recycling conditions.
  • the pressure sensitive adhesive is configured to bond the recyclable construction to a substrate. Further, in some embodiments, the PSA is configured to debond from the substrate. In some embodiments, the PSA is configured to debond from the substrate to which the recyclable construction has been applied, upon subjection to mechanical recycling conditions.
  • adhesives that are capable of debonding under recycling conditions can be any suitable adhesive, such as for example wash-off adhesives or dissolvable adhesives.
  • the pressure sensitive adhesive is capable of remaining attached to the recyclable construction upon debonding of the pressure sensitive adhesive from the substrate.
  • the pressure sensitive adhesive is capable of removal from the recyclable construction upon debonding of the pressure sensitive adhesive from the substrate. In some embodiments, the pressure sensitive adhesive is configured to remain attached to the recyclable construction upon debonding of the pressure sensitive adhesive from the substrate. In some embodiments, the pressure sensitive adhesive is configured to remove from the recyclable construction upon debonding of the pressure sensitive adhesive from the substrate.
  • Any suitable PSA that will debond from the substrate under mechanical recycling conditions can be used, such as for example wash-off adhesives and dissolvable adhesives.
  • Suitable wash- off PSAs are well known in the art, such as for example, synthetic polymer based adhesive (for example rubber hotmelt adhesives or acrylic adhesives (for example, those described in European Patent 0618947 to Bernard, US Patent 10590315 to Mueller, and U.S. Patent 5508367, all of which are herein incorporated by reference, among others)), and bioderived adhesives.
  • wash-off adhesives examples include the Henkel Re adhesives, such as for example Loctite Liofol LA 4220 RE/Loctite Liofol LA 3180 RE, a two-component adhesive system, and Aquence PS 3682 (each commercially available from Henkel Corporation, located in Connecticut, USA), the CleanflakeTM adhesives, such as for example S3010, S7000 ER, S7400 ER and S692N ER (commercially available from Avery Dennison Corporation, located in Ohio, USA), and FlexcrylTM ClearCycle 1000 (commercially available from Bostik, located in France).
  • Henkel Re adhesives such as for example Loctite Liofol LA 4220 RE/Loctite Liofol LA 3180 RE
  • Aquence PS 3682 each commercially available from Henkel Corporation, located in Connecticut, USA
  • CleanflakeTM adhesives such as for example S3010, S7000 ER, S7400 ER and S692N ER (commercially
  • any suitable dissolvable adhesive may be used, such as for example a synthetic polymer based (for example an acrylic adhesive), or a bioderived adhesive.
  • suitable dissolvable adhesives include Herma Adhesive 62P adhesives, such as for example product codes 16820, 16822, 16889, 16909 and 16958 and the 62RPW and 52W adhesives (commercially available from Herma Company, located in Germany), and WX6030, WW2031 and WW4031 adhesives (commercially available from Henkel Corporation, located in Ohio, USA).
  • the pressure sensitive adhesive is an acrylic based adhesive.
  • the pressure sensitive adhesive selected from an acrylic emulsion based, acrylic hot melt, or rubber-based hot melt adhesive.
  • the adhesive is an acrylic emulsion based.
  • the pressure sensitive adhesive is not capable of debonding from a substrate or not configured to debond from a substrate, in other words it is a non-debondable adhesive.
  • a dissolvable coating is disposed on a surface of the non-debondable adhesive.
  • the dissolvable coating separates the pressure sensitive adhesive from the wireless communication device. Any suitable pressure sensitive adhesive that is not capable of debonding from a substrate may be used. Examples of suitable pressure sensitive adhesives include acrylic, and rubber-based pressure sensitive adhesive. Examples of commercially available pressure sensitive adhesives include FassonTM S2550 and FassonTM Z3000 (available from Avery Dennison Corporation, located in Ohio, USA), or AquenceTM AV7590 (available from Henkel Corporation, located in Germany).
  • the recyclable construction includes at least one additional layer having a first surface and a second surface.
  • Any suitable additional layers can be included in the recyclable construction, such as for example one or more additional carriers, one or more permanent adhesives, one or more dissolvable coatings (such as for example dissolvable adhesives).
  • the at least one additional layer is selected from the group of a second carrier, a third carrier, a first permanent adhesive, a second permanent adhesive, a dissolvable adhesive, a dissolvable coating, and any combination thereof.
  • the recyclable construction can include one or more carriers.
  • the first carrier can have a composition that is the same as or different from the additional carriers.
  • the first carrier has the same composition as at least one of the second carrier and the third carrier. In some embodiments, the first carrier has a different composition from the composition of at least one of the second and third carrier.
  • the dissolvable coating may be dissolvable in any suitable material. In some embodiments, the dissolvable coating is dissolvable under conditions that will cause aluminum to dissolve. In some embodiments, the dissolvable coating is dissolvable in a wash composition having a pH of greater than 9. Any suitable dissolvable coating can be used, such as for example water soluble coatings such as polyvinyl alcohols.
  • dissolvable polyvinyl alcohol coating examples include the S1500 Series polyvinyl alcohols (commercially available from SNP, Inc., located in North Carolina, USA).
  • the dissolvable adhesive may be dissolvable in any suitable material.
  • the dissolvable adhesive is dissolvable under conditions that will cause aluminum to dissolve.
  • the dissolvable adhesive is dissolvable in a wash composition having a pH of greater than 9.
  • Any suitable dissolvable adhesive can be used, such as for example a synthetic polymer based (for example an acrylic adhesive), or a bioderived adhesive.
  • Herma Adhesive 62P adhesives such as for example product codes 16820, 16822, 16889, 16909 and 16958 (commercially available from Herma Company, located in Germany), and WX6030, WW2031 and WW4031 adhesives (commercially available from Henkel Corporation, located in Ohio, USA).
  • the first carrier can have any suitable shape. The outer edges of that shape define the perimeter of the first carrier. In some embodiments, the first carrier has a length and width defining the perimeter of the first carrier. In some embodiments, the pressure sensitive adhesive is coextensive with the first carrier. By “coextensive” is meant herein having the same or substantially the same sized perimeter, for example, having the same or substantially the same length and width. Accordingly, in some embodiments, the dimensions of the perimeter of the pressure sensitive adhesive are the same or substantially the same as the dimensions perimeter of the first carrier. This enables the full surface of the first carrier to be attached to an article to which the recyclable construction is to be applied. In some embodiments, the pressure sensitive adhesive extends beyond the perimeter of the first carrier.
  • the dimensions of the perimeter of the pressure sensitive adhesive is larger than the dimensions perimeter of the first carrier.
  • the pressure sensitive adhesive has a length that is greater than the length of the first carrier and a width that is greater than the width of the first carrier.
  • the pressure sensitive adhesive has at least one of a length that is greater than the length of the first carrier, and a width that is greater than the width of the first carrier.
  • the pressure sensitive adhesive has a length that is greater than a length of the first carrier.
  • the pressure sensitive adhesive has an area that is greater than the area of the first carrier.
  • At least one of the length, width, perimeter, area and circumference of the pressure sensitive adhesive extends beyond the corresponding length, width, perimeter, area and/or circumference of the first carrier.
  • articles are typically sorted, shredded into flakes, washed, and dried.
  • the pressure sensitive adhesive is a dissolvable adhesive.
  • the dissolvable adhesive releases into the wash composition during the washing process. This enables the recovery of the adhesive-free wireless identification device during the recycling process.
  • a dissolvable coating is disposed between the pressure sensitive adhesive and the wireless identification device. The dissolvable coating releases into the wash composition during the washing process, releasing the wireless identification device from the pressure sensitive adhesive. This enables the recovery of the adhesive-free wireless identification device during the recycling process.
  • the recyclable construction further includes a first permanent adhesive.
  • the recyclable construction includes a first permanent adhesive disposed between the first carrier and the wireless identification device. This permanent adhesive serves to secure the wireless identification device to the first carrier.
  • the permanent adhesive has the same or substantially the same shape as the conductive material.
  • this enables the conductive material, where it is deposited in the shape and configuration of an antenna, to be deposited on the adhesive, where it will function as an antenna. In some embodiments, it enables a conductive material having dimensions that are larger than the deposited first permanent adhesive to be deposited onto the first permanent adhesive, and then be laser cut, die cut, or both, into the dimensions of the underlying first permanent adhesive, where it will function as an antenna.
  • FIG. 1 illustrates an exemplary embodiment of a side view of a recyclable construction 100 according to embodiments of the disclosure.
  • the recyclable construction 100 includes a first carrier 110, a wireless identification device 120, and a pressure sensitive adhesive 130.
  • the first carrier 110 has a first surface 111 and a second, oppositely directed surface 112.
  • the wireless identification device 120 has a first surface 121 and a second, oppositely directed surface 122.
  • the pressure sensitive adhesive 130 has a first surface 131 and a second, oppositely directed surface 132.
  • the wireless identification device 120 is disposed on at least a portion of the first surface 111 of the first carrier 110.
  • the pressure sensitive adhesive 130 is disposed on at least a portion of the first surface 121 of the wireless identification device 120.
  • FIG. 2 illustrates an exemplary embodiment of a side view of a recyclable construction 200 according to embodiments of the disclosure.
  • the recyclable construction 200 includes a first carrier 210, a wireless identification device 220, a first permanent adhesive 240, and a pressure sensitive adhesive 230.
  • the first carrier 210 has a first surface 211 and a second, oppositely directed surface 212.
  • the wireless identification device 220 has a first surface 221 and a second, oppositely directed surface 222.
  • the pressure sensitive adhesive 230 has a first surface 231 and a second, oppositely directed surface 232.
  • the first permanent adhesive 240 is disposed between the first carrier 210 and the wireless identification device 220. Accordingly, the wireless identification device 220 is adhered to the first surface 211 of the first carrier 210 by the first permanent adhesive 240.
  • the pressure sensitive adhesive 230 is disposed on at least a portion of the first surface 221 of the wireless identification device 220.
  • the recyclable construction further includes a liner.
  • the liner is disposed on at least a portion of the first surface of the pressure sensitive adhesive.
  • FIG. 3 illustrates an exemplary embodiment of a side view of a recyclable construction according to embodiments of the disclosure.
  • the recyclable construction 300 includes a first carrier 310, a wireless identification device 320, a pressure sensitive adhesive 330, and a liner 350.
  • the first carrier has a first surface 311 and a second, oppositely directed surface 312.
  • the wireless identification device 320 has a first surface 321 and a second, oppositely directed surface 322.
  • the pressure sensitive adhesive 330 has a first surface 331 and a second, oppositely directed surface 332.
  • the wireless identification device 320 is disposed on at least a portion of the first surface 311 of the first carrier 310.
  • the pressure sensitive adhesive 330 is disposed on at least a portion of the first surface 321 of the wireless identification device 320.
  • the liner 350 is disposed on at least a portion of the first surface 331 of the pressure sensitive adhesive 330.
  • the recyclable construction further includes an additional, or second carrier.
  • the second carrier has a first surface and a second surface.
  • the second carrier is disposed over the wireless identification device, so that is resides between the pressure sensitive adhesive and the wireless identification device.
  • the second permanent adhesive adheres at least a portion of the surface of the second carrier to at least a portion of the surface of the wireless identification device.
  • the second permanent adhesive adheres at least a portion of the surface of the second carrier to the entire, or substantially entire surface of the wireless identification device.
  • the second permanent adhesive adheres at least a portion of the second surface of the second carrier to at least a portion of the first surface of the wireless identification device.
  • the second carrier is a heat stable polymeric film.
  • the heat stable polymeric film includes a polyolefin.
  • the polyolefin is selected from a polypropylene, a polyethylene, or any combination thereof.
  • the polypropylene is a biaxially oriented polypropylene (BOPP).
  • the polymeric film is not a polyester.
  • the polymeric film is not a PET.
  • the polymeric film is not a foam.
  • the presence of the first and second carrier serves to sandwich, and thereby protect the wireless identification device. This diminishes or prevents the opportunity for the conductive material to separate from the first carrier during the wash-off process.
  • a second permanent adhesive adheres at least a portion of the surface of the second carrier to at least a portion of the surface of the wireless identification device.
  • FIG. 4 illustrates an exemplary embodiment of a side view of a recyclable construction according to embodiments of the disclosure.
  • the recyclable construction 400 includes a first carrier 410, a first permanent adhesive 440, a wireless identification device 420, a second permanent adhesive 460, a second carrier 470, and a pressure sensitive adhesive 430.
  • the first carrier 410 has a first surface 411 and a second, oppositely directed surface 412.
  • the wireless identification device 420 has a first surface 421 and a second, oppositely directed surface 422.
  • the pressure sensitive adhesive 430 has a first surface 431 and a second, oppositely directed surface 432.
  • a first permanent adhesive 440 is disposed between the first carrier 410 and the wireless identification device 420.
  • the first permanent adhesive 440 adheres the second surface 422 of the wireless identification device 420 to at least a portion of the first surface 411 of the first carrier 410.
  • the second carrier 470 has a first surface 471 and a second surface 472.
  • a second permanent adhesive 460 adheres the second surface 472 of the second carrier 470 to the first surface 421 of the wireless identification device 420, so that the second carrier 470 resides between the pressure sensitive adhesive 430 and the wireless identification device 420.
  • the second surface 432 of the pressure sensitive adhesive 430 is disposed on at least a portion of the first surface 471 of the second carrier 470.
  • the recyclable construction has a bulk density selected so as to make the construction sink or float during the recycling wash-off process.
  • bulk density is meant herein the overall density of the recyclable construction. This overall density determines whether the construction will sink or float during the wash-off process.
  • the recyclable construction has a bulk density of less than 1 g/cubic centimeter.
  • These low bulk density constructions will float during the wash-off process, while, articles to which they are attached, having a density of greater than 1 g/cubic meter, such as for example PET, will sink.
  • This low bulk density can be inherent to the materials incorporated in the construction.
  • the first carrier includes a material that inherently has a density of less than 1 g/cubic centimeter, such as for example, a polyolefin.
  • at least one of the first carrier, the second carrier and the third carrier includes a material that inherently has a density of less than 1 g/cubic centimeter.
  • the low density can be achieved by using a film that has been de-densified, thereby decreasing its density in some way.
  • the first carrier, and/or the second carrier, and/or the third carrier can be films that have been de-densified by cavitation or incorporation of low density materials.
  • the first carrier is a de-densified film.
  • at least one of the first carrier, the second carrier and the third carrier is a de- densified film.
  • the first carrier is a cavitated film.
  • at least one of the first carrier, the second carrier and the third carrier is a cavitated film. The film may have been cavitated by any suitable means.
  • the first carrier is a film that has been cavitated by at least one cavitating agent the film.
  • cavitating agent is meant herein at least one particle that induces micro-voids in a material. The presence of the cavitating agent in the carrier during the orientation of the film induces micro-voids. With a high degree of voiding, the film density can be reduced accordingly. Any suitable cavitating agent can be used.
  • the cavitating agent is a void-initiating particle including at least one of an organic polymer or an inorganic material.
  • the cavitating agent is a void-initiating particle including an organic polymer, such as for example, a polyamide, (such as for example, nylon-6), a polyester (such as for example polybutylene terephthalate (PBT)), an acrylic resin, or combinations thereof.
  • the cavitating agent is a void-initiating particle including an organic polymer, such as for example cyclic olefin polymers, cyclic olefin copolymers, ethylene norbornene copolymers, or combinations thereof.
  • the cavitating agent is a void-initiating particle including an inorganic polymer, such as for example, a glass, metal, ceramic, silica, calcium carbonate (CaCO3), clay, talc, or combinations thereof.
  • at least a portion of the film layer is an oriented polypropylene (PP) film, and the cavitating agent is a betanucleating PP.
  • PP polypropylene
  • at least one non-cavitated skin is disposed on at least one face of the cavitated film.
  • the cavitated film is sandwiched between two non-cavitated skins. The non-cavitated film provides support to the cavitated film.
  • the first carrier of the recyclable construction has a density of less than 1 g/cubic centimeter. In some embodiments, the first carrier of the recyclable construction includes a low density material having a density of less than 1 g/cubic centimeter. In some embodiments, the first carrier of the recyclable construction includes a low density material having a density sufficiently low that the recyclable construction has a bulk density of less than 1 g/cubic centimeter. In some embodiments, the low density material has a density of no more than 0.91 g/cubic meter.
  • the low density material has a density of no more than 0.88 g/cubic meter, no more than 0.8 g/cubic meter, no more than 0.7 g/cubic meter, no more than 0.6 g/cubic meter, or no more than 0.5 g/cubic meter.
  • Any suitable low density material can be used.
  • the low density material is selected from a filler, hollow glass spheres, a foaming agent, expanding cells, or any combination thereof.
  • the recyclable construction has been de-densified by at least one of cavitation or addition of a low density material.
  • first carrier and/or the second carrier, and/or the third carrier include a de-densified polyolefin, polyethylene terephthalate, polycarbonate, acrylic, polyurethane, or any combination thereof.
  • the recyclable construction includes a second carrier.
  • the recyclable construction includes a second carrier that is a de-densified film.
  • the second carrier is a cavitated film.
  • the film may have been cavitated by any suitable means.
  • the second carrier is a film that has been cavitated by at least one cavitating agent the film, such as those described herein-above forthe first carrier.
  • the second carrier of the recyclable construction has a density of less than 1 g/cubic centimeter.
  • the second carrier of the recyclable construction includes a low density material having a density of less than 1 g/cubic centimeter.
  • the second carrier of the recyclable construction includes a low density material having a density sufficiently low that the recyclable construction has a bulk density of less than 1 g/cubic centimeter.
  • the low density material has a density of no more than 0.91 g/cubic meter.
  • the low density material has a density of no more than 0.88 g/cubic meter, no more than 0.8 g/cubic meter, no more than 0.7 g/cubic meter, no more than 0.6 g/cubic meter, or no more than 0.5 g/cubic meter.
  • the recyclable construction has been de-densified by at least one of cavitation or addition of a low density material.
  • the recyclable construction includes a third carrier.
  • the recyclable construction includes a third carrier that is a de-densified film.
  • the third carrier is a cavitated film.
  • the film may have been cavitated by any suitable means.
  • the second carrier is a film that has been cavitated by at least one cavitating agent the film, such as those described herein-above forthe first carrier.
  • the third carrier of the recyclable construction has a density of less than 1 g/cubic centimeter.
  • the third carrier of the recyclable construction includes a low density material having a density of less than 1 g/cubic centimeter.
  • the third carrier of the recyclable construction includes a low density material having a density sufficiently low that the recyclable construction has a bulk density of less than 1 g/cubic centimeter.
  • the low density material has a density of no more than 0.91 g/cubic meter.
  • the low density material has a density of no more than 0.88 g/cubic meter, no more than 0.8 g/cubic meter, no more than 0.7 g/cubic meter, no more than 0.6 g/cubic meter, or no more than 0.5 g/cubic meter.
  • the recyclable construction has been de-densified by at least one of cavitation or addition of a low density material.
  • the first carrier, the second carrier, and the third carrier can have the same or a different composition.
  • at least one of the first carrier, the second carrier, and the third carrier is de-densified.
  • at least one of the first carrier, the second carrier, and the third carrier is not de-densified.
  • at least one of the first carrier, the second carrier, and the third carrier is cavitated.
  • at least of the first carrier, the second carrier, and the third carrier is not cavitated.
  • at least one of the first carrier, the second carrier, and the third carrier further includes a de-densified material.
  • at least one of the first carrier, the second carrier, and the third carrier does not include a de-densified material.
  • FIG. 5 illustrates an exemplary embodiment of a side view of a recyclable construction 500 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 500 includes a first carrier 510, a second carrier 570, a wireless identification device 520, and a pressure sensitive adhesive 530.
  • the first carrier 510 has a first surface 511 and a second, oppositely directed surface 512.
  • the second carrier 570 has a first surface 571 and a second, oppositely directed surface 572.
  • the wireless identification device 520 has a first surface 521 and a second, oppositely directed surface 522.
  • the pressure sensitive adhesive 530 has a first surface 531 and a second, oppositely directed surface 532.
  • the wireless identification device 520 is disposed on at least a portion of the first surface 512 of the first carrier 510.
  • the pressure sensitive adhesive 530 is disposed on at least a portion of the first surface 521 of the first carrier 510, and the second carrier 570 is disposed on at least a portion of the second surface of 522 the wireless identification device 520.
  • the pressure sensitive adhesive 530 is co-extensive with the first carrier 510.
  • FIG. 6 illustrates an exemplary embodiment of a side view of a recyclable construction 600 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 600 includes a first carrier 610, a second carrier 670, a wireless identification device 620, a pressure sensitive adhesive 630, and a dissolvable adhesive 680.
  • the first carrier 610 has a first surface 611 and a second, oppositely directed surface 612.
  • the second carrier 670 has a first surface 671 and a second, oppositely directed surface 672.
  • the wireless identification device 620 has a first surface 621 and a second, oppositely directed surface 622.
  • the wireless identification device 620 is disposed on at least a portion of the first surface 612 of the first carrier 610.
  • the pressure sensitive adhesive 630 is disposed on at least a portion of the first surface 621 of the first carrier 610, and the second carrier 670 is disposed on at least a portion of the second surface of 622 the wireless identification device 620.
  • the dissolvable adhesive 680 is disposed between the first carrier 610 and the wireless identification device 620.
  • the pressure sensitive adhesive 630 is co-extensive with the first carrier 610.
  • FIG. 7 illustrates an exemplary embodiment of a side view of a recyclable construction 700 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 700 includes a first carrier 710, a second carrier 770, a wireless identification device 720, a pressure sensitive adhesive 730, and a dissolvable adhesive 780.
  • the first carrier 710 has a first surface 711 and a second, oppositely directed surface 712.
  • the second carrier 770 has a first surface 771 and a second, oppositely directed surface 772.
  • the wireless identification device 720 has a first surface 721 and a second, oppositely directed surface 722.
  • the wireless identification device 720 is disposed on at least a portion of the first surface 712 of the first carrier 710.
  • the pressure sensitive adhesive 730 is disposed on at least a portion of the first surface 721 of the first carrier 710, and the second carrier 770 is disposed on at least a portion of the second surface of 722 the wireless identification device 720.
  • the dissolvable adhesive 780 is disposed between the second carrier 770 and the wireless identification device 720.
  • the pressure sensitive adhesive 730 is co-extensive with the first carrier 710.
  • FIG. 8 illustrates an exemplary embodiment of a side view of a recyclable construction 800 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 800 includes a first carrier 810, a second carrier 870, a wireless identification device 820, and a pressure sensitive adhesive 830.
  • the first carrier 810 has a first surface 811 and a second, oppositely directed surface 812.
  • the second carrier 870 has a first surface 871 and a second, oppositely directed surface 872.
  • the wireless identification device 820 has a first surface 821 and a second, oppositely directed surface 822.
  • the pressure sensitive adhesive 830 has a first surface 831 and a second, oppositely directed surface 832.
  • the wireless identification device 820 is disposed on at least a portion of the second surface 812 of the first carrier 810.
  • the pressure sensitive adhesive 830 is disposed on at least a portion of the second surface 822 of the wireless identification 820, and the second carrier 870 is disposed on at least a portion of the second surface of 832 the pressure sensitive adhesive 830.
  • the pressure sensitive adhesive 830 has a length that is greater than the length of the first carrier 810. Accordingly, the pressure sensitive 830 adhesive extends beyond the perimeter of the first carrier 810.
  • FIG. 9 illustrates an exemplary embodiment of a side view of a recyclable construction 900 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 900 includes a first carrier 910, a second carrier 970, a third carrier 990, a wireless identification device 920, and a pressure sensitive adhesive 930.
  • the first carrier 910 has a first surface 911 and a second, oppositely directed surface 912.
  • the second carrier 970 has a first surface 971 and a second, oppositely directed surface 972.
  • the third carrier 990 has a first surface 991 and a second, oppositely directed surface 992.
  • the wireless identification device 920 has a first surface 921 and a second, oppositely directed surface 922.
  • the pressure sensitive adhesive 930 has a first surface 931 and a second, oppositely directed surface 932.
  • the wireless identification device 920 is disposed on at least a portion of the second surface 912 of the first carrier 910.
  • the pressure sensitive adhesive 930 is disposed on at least a portion of the second surface 922 of the wireless identification 920, and the second carrier 970 is disposed on at least a portion of the second surface of 932 the pressure sensitive adhesive 930.
  • the third carrier 990 is disposed between the wireless identification device 920 and the pressure sensitive adhesive 930.
  • the pressure sensitive adhesive 930 has a length that is greater than the length of the first carrier 910. Accordingly, the pressure sensitive adhesive 930 extends beyond the perimeter of the first carrier 910.
  • the pressure sensitive adhesive is a dissolvable adhesive. This enables the second carrier to be separated from the wireless identification deice and the second carrier during recycling.
  • FIG. 10 illustrates an exemplary embodiment of a side view of a recyclable construction 1000 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 1000 includes a first carrier 1010, a second carrier 1070, a third carrier 1090, a wireless identification device 1020, a pressure sensitive adhesive 1030, and a dissolvable adhesive 1080.
  • the first carrier 1010 has a first surface 1011 and a second, oppositely directed surface 1012.
  • the second carrier 1070 has a first surface 1071 and a second, oppositely directed surface 1072.
  • the third carrier 1090 has a first surface 1091 and a second, oppositely directed surface 1092.
  • the wireless identification device 1020 has a first surface 1021 and a second, oppositely directed surface 1022.
  • the pressure sensitive adhesive 1030 has a first surface 1031 and a second, oppositely directed surface 1032.
  • the wireless identification device 1020 is disposed on at least a portion of the second surface 1012 of the first carrier 1010.
  • the pressure sensitive adhesive 1030 is disposed on at least a portion of the second surface 1022 of the wireless identification 1020, and the second carrier 1070 is disposed on at least a portion of the second surface of 1032 the pressure sensitive adhesive 1030.
  • the third carrier 1090 is disposed between the wireless identification device 1020 and the pressure sensitive adhesive 1030, and the dissolvable adhesive 1080 adheres the wireless identification device 1020 to the third carrier 1090.
  • the pressure sensitive adhesive 1030 has a length that is greater than the length of the first carrier 1010. Accordingly, the pressure sensitive adhesive 1030 extends beyond the perimeter of the first carrier 1010. In some embodiments, the pressure sensitive adhesive is a dissolvable adhesive. This enables the second carrier to be separated from the wireless identification deice and the second carrier during recycling.
  • FIG. 11 illustrates an exemplary embodiment of a side view of a recyclable construction 1100 according to embodiments of the disclosure, having a density of less than lg/cubic centimeter.
  • the recyclable construction 1100 includes a first carrier 1110, a second carrier 1170, a third carrier 1190, a wireless identification device 1120, a pressure sensitive adhesive 1130, and a dissolvable adhesive 1180.
  • the first carrier 1110 has a first surface 1111 and a second, oppositely directed surface 1112.
  • the second carrier 1170 has a first surface 1171 and a second, oppositely directed surface 1172.
  • the third carrier 1190 has a first surface 1191 and a second, oppositely directed surface 1192.
  • the wireless identification device 1120 has a first surface 1121 and a second, oppositely directed surface 1122.
  • the pressure sensitive adhesive 1130 has a first surface 1131 and a second, oppositely directed surface 1132.
  • the wireless identification device 1120 is disposed on at least a portion of the first surface 1111 of the first carrier 1111.
  • the pressure sensitive adhesive 1130 is disposed on at least a portion of the second surface 1132 of the pressure sensitive adhesive 1130, and the third carrier 1190 is disposed on at least a portion of the second surface of 1121 the wireless identification device 1120.
  • the dissolvable adhesive 1180 adheres the wireless identification device 1120 and the third carrier 1190.
  • the pressure sensitive adhesive 1130 has a length that is greater than the length of the first carrier 1110. Accordingly, the pressure sensitive adhesive 1130 extends beyond the perimeter of the first carrier 1110.
  • the pressure sensitive adhesive is a dissolvable adhesive. This enables the second carrier to be separated from the wireless identification deice and the second carrier during recycling.
  • the recyclable construction has a bulk density of greater than 1 g/cubic centimeter.
  • These high bulk density constructions will sink during the wash-off process, while, articles to which they are attached, having a density of less than 1 g/cubic meter, such as for example polypropylene ( PP) or high density polyethylene (HDPE), will float.
  • PP polypropylene
  • HDPE high density polyethylene
  • the first carrier and/or the second carrier, and/or the third carrier include a material that inherently has a density of greater than 1 g/cubic centimeter, such as for example, a polycarbonate, polymethylmethacrylate (PMMA), polylactic acid, polystyrene, acrylonitrile butadiene styrene, rigid polyvinyl chloride, polyetheretherketone (PEEK), polyethersulfone (PES), polyamide, polyimide, and any combination thereof.
  • a material that inherently has a density of greater than 1 g/cubic centimeter such as for example, a polycarbonate, polymethylmethacrylate (PMMA), polylactic acid, polystyrene, acrylonitrile butadiene styrene, rigid polyvinyl chloride, polyetheretherketone (PEEK), polyethersulfone (PES), polyamide, polyimide, and any combination thereof.
  • PMMA polymethylmethacrylate
  • the high density can be achieved by using a film that has been densified, thereby decreasing its density in some way.
  • the first carrier, the second carrier, and the third carrier can be films that have been densified by incorporation of high density materials.
  • the first carrier of the recyclable construction has a density of greater than 1 g/cubic centimeter.
  • the first carrier is a densified film.
  • the first carrier of the recyclable construction includes a high density material having a density sufficiently high that the recyclable construction has a bulk density of greater than 1 g/cubic centimeter.
  • the high density material has a density of greater than 1 g/cubic centimeter.
  • the high density material has a density of at least 2 g/cubic centimeter, at least 3 g/cubic centimeter, or at least 4 g/cubic centimeter. Any suitable high density material can be used.
  • the high density material is at least one of a filler or pigment.
  • at least one of the first carrier, the second carrier, and the third carrier include a densified polyolefin, polyethylene terephthalate, polycarbonate, acrylic, polyurethane, or any combination thereof.
  • at least one of the first carrier, the second carrier, and the third carrier include at least one of a densified polypropylene and a polyethylene.
  • the second carrier of the recyclable construction has a density of greater than 1 g/cubic centimeter. In some embodiments, the second carrier is a densified film. In some embodiments, the second carrier of the recyclable construction includes a high density material having a density sufficiently high that the recyclable construction has a bulk density of greater than 1 g/cubic centimeter. In some embodiments, the high density material has a density of greater than 1 g/cubic centimeter. In some embodiments, the high density material has a density of at least 2 g/cubic centimeter, at least 3 g/cubic centimeter, or at least 4 g/cubic centimeter. Any suitable high density material can be used. In some embodiments, the high density material is at least one of a filler or pigment.
  • the third carrier of the recyclable construction has a density of greater than 1 g/cubic centimeter. In some embodiments, the third carrier is a densified film. In some embodiments, the third carrier of the recyclable construction includes a high density material having a density sufficiently high that the recyclable construction has a bulk density of greater than 1 g/cubic centimeter. In some embodiments, the high density material has a density of greater than 1 g/cubic centimeter. In some embodiments, the high density material has a density of at least 2 g/cubic centimeter, at least 3 g/cubic centimeter, or at least 4 g/cubic centimeter. Any suitable high density material can be used. In some embodiments, the high density material is at least one of a filler or pigment.
  • the first carrier, the second carrier, and the third carrier can have the same or different composition.
  • at least one of the first carrier, the second carrier, and the third carrier is densified.
  • at least one of the first carrier, the second carrier, and the third carrier is not densified.
  • at least one of the first carrier, the second carrier, and the third carrier further includes a densified material.
  • at least one of the first carrier, the second carrier, and the third carrier does not include a densified material.
  • the pressure sensitive adhesive is densified.
  • the pressure sensitive adhesive includes a high density material having a density of greater than 1 g/cubic centimeter.
  • the high density material has a density of at least 2 g/cubic centimeter, at least 3 g/cubic centimeter, or at least 4 g/cubic centimeter.
  • the densified adhesive includes at least one of a filler or pigment.
  • FIG. 12 illustrates an exemplary embodiment of a side view of a recyclable construction 1200 according to embodiments of the disclosure, having a density of greater than lg/cubic centimeter.
  • the recyclable construction 1200 includes a first carrier 1210, a second carrier 1270, a wireless identification device 1220, a pressure sensitive adhesive 1230, and a permanent adhesive 1240.
  • the first carrier 1210 has a first surface 1211 and a second, oppositely directed surface 1212.
  • the second carrier 1270 has a first surface 1271 and a second, oppositely directed surface 1272.
  • the wireless identification device 1220 has a first surface 1221 and a second, oppositely directed surface 1222.
  • the wireless identification device 1220 is disposed on at least a portion of the first surface 1212 of the first carrier 1210.
  • the pressure sensitive adhesive 1230 is disposed on at least a portion of the first surface 1221 of the first carrier 1210, and the second carrier 1270 is disposed on at least a portion of the second surface 1222 of the wireless identification device 1220.
  • the permanent adhesive 1240 is disposed between the first carrier 1210 and the wireless identification device 1220.
  • the pressure sensitive adhesive 1230 has a length that is greater than the length of the first carrier 1210. Accordingly, the pressure sensitive adhesive 1230 extends beyond the perimeter of the first carrier 1210.
  • FIG. 13 illustrates an exemplary embodiment of a side view of a recyclable construction 700 according to embodiments of the disclosure, having a density of greater than lg/cubic centimeter.
  • the recyclable construction 1300 includes a first carrier 1310, a second carrier 1370, a wireless identification device 1320, a pressure sensitive adhesive 1330, and a permanent adhesive 1340.
  • the first carrier 1310 has a first surface 1311 and a second, oppositely directed surface 1312.
  • the second carrier 1370 has a first surface 1371 and a second, oppositely directed surface 1372.
  • the wireless identification device 1320 has a first surface 1321 and a second, oppositely directed surface 1322.
  • the wireless identification device 1320 is disposed on at least a portion of the first surface 1312 of the first carrier 1310.
  • the pressure sensitive adhesive 1330 is disposed on at least a portion of the first surface 1321 of the first carrier 1310, and the second carrier 1370 is disposed on at least a portion of the second surface of 1322 the wireless identification device 1320.
  • the permanent adhesive 1340 is disposed between the second carrier 1370 and the wireless identification device 1320.
  • the pressure sensitive adhesive 1330 is co-extensive with the first carrier 1310.
  • the pressure sensitive adhesive 1330 has a length that is greater than the length of the first carrier 1310. Accordingly, the pressure sensitive adhesive 1330 extends beyond the perimeter of the first carrier 1310.
  • FIG. 14 illustrates an exemplary embodiment of a side view of a recyclable construction 1400 according to embodiments of the disclosure, having a density of greater than lg/cubic centimeter.
  • FIG. 14a illustrates the recyclable construction 1400 in an intact state, prior to the commencement of recycling.
  • the recyclable construction 1400 includes a first carrier 1410, a second carrier 1470, a dissolvable coating 14100, a wireless identification device 1420, and a pressure sensitive adhesive 1430.
  • the first carrier 1410 has a first surface 1411 and a second, oppositely directed surface 1412.
  • the second carrier 1470 has a first surface 1471 and a second, oppositely directed surface 1472.
  • the dissolvable coating 14100 has a first surface 14101 and a second, oppositely directed surface 14102.
  • the wireless identification device 1420 has a first surface 1421 and a second, oppositely directed surface 1422.
  • the pressure sensitive adhesive 1430 has a first surface 1431 and a second, oppositely directed surface 1432.
  • the wireless identification device 1420 is disposed on at least a portion of the second surface 1412 of the first carrier 1410.
  • the pressure sensitive adhesive 1430 is disposed on at least a portion of the second surface 1422 of the wireless identification 1420, and the second carrier 1470 is disposed on at least a portion of the second surface of 1432 the pressure sensitive adhesive 1430.
  • the dissolvable coating 14100 is disposed between the wireless identification device 1420 and the pressure sensitive adhesive 1430.
  • the pressure sensitive adhesive 1430 has a length that is greater than the length of the first carrier 1410. Accordingly, the pressure sensitive adhesive 1430 extends beyond the perimeter of the first carrier 1410. The portions of the pressure sensitive adhesive that extend beyond the perimeter of the first carrier 1433 are attached to a substrate of an article (not shown). The portions of the pressure sensitive adhesive that do not extend beyond the perimeter of the first carrier 1434 are attached to the dissolvable coating 14100.
  • the pressure sensitive adhesive is capable of debonding from a substrate. In some embodiments, the pressure sensitive adhesive is not capable of debonding from a substrate.
  • FIG. 14b illustrates the recyclable construction 1400 after the shredding stage.
  • FIG. 14c illustrates the recyclable construction 1400 after the washing step of a recycling process.
  • the dissolvable coating 14100 that was disposed between the pressure sensitive adhesive 1430 and the wireless identification device 1420 has released into the wash composition (not shown) during the washing process, thereby releasing the wireless identification device 1420 from the pressure sensitive adhesive 1430. This enables the recovery of the adhesive-free wireless identification device during the recycling process.
  • a dissolvable pressure sensitive adhesive can be used instead of a pressure sensitive adhesive in combination with a dissolvable coating.
  • the recyclable construction meets at least one of the applicable Association of Plastic Retailers (APR) or the Plastic Recyclers Europe (PRE) recycling guidelines. These guidelines vary by material type, for example, APR PET CG-02 for polyethylene terephthalate, APR HDPE CG-01 for high density polyethylene, APR FPE-CG-01 for low density polyethylene (LDPE), and APR PP CG-01 for polypropylene.
  • APR PET CG-02 for polyethylene terephthalate
  • APR HDPE CG-01 high density polyethylene
  • APR FPE-CG-01 low density polyethylene
  • APR PP CG-01 for polypropylene.
  • the invention further includes a method of making the recyclable construction.
  • the method includes providing the first carrier, disposing the wireless identifications device on at least a portion of the first surface of the first carrier, and disposing the pressure sensitive adhesive on an outer layer of the recyclable construction.
  • the wireless identifications device is disposed on the first carrier by any suitable means, such as for example etching, laser printing, or being disposed on an adhesive and optionally being at least one of laser cut or die cut, as is described herein-above.
  • the wireless identification device is disposed by printing a conductive ink in the shape of an antenna.
  • the wireless identification device is disposed by etching.
  • the wireless identifications device is disposed by depositing the first permanent adhesive on at least a portion of the first surface of the first carrier, and depositing the wireless identification device on at least a portion of the first surface of the first permanent adhesive.
  • the wireless identification device can be deposited such that it has the dimensions of an antenna, or dimensions larger than an antenna and then at least one of laser cut or die cut.
  • the method further includes coupling an integrated circuit to the wireless identifications device.
  • the invention further includes a method of recycling the recyclable construction of the invention.
  • the method includes providing a recyclable construction bonded to the substrate of an article, and subjecting the article to mechanical recycling conditions. Recycling processes and conditions are well known to those in the art. As noted hereinabove, typically, this involves grinding the article to which the wireless identification device has been attached, and then placing the resulting flakes in a heated washwater, typically under agitation. Usually, the washwater will contain a caustic or a surfactant or both.
  • the recycling conditions include exposure to a wash composition including at least one of a caustic or a surfactant.
  • the recycling conditions include exposure to a wash composition having a temperature of from 40°C to 90°C washwater conditions cause the debonding of the pressure sensitive adhesive from the article.
  • the article to which the recyclable construction was attached can then be recovered and later used for other purposes.
  • the recyclable construction has a bulk density of less than 1 g/cubic centimeter, and the article to which it was attached has a density of greater than 1 g/cubic centimeter. The less dense recyclable construction will float in the washwater, while the more dense article will sink, enabling separate collection of the flakes of the recyclable construction and the article flakes.
  • the recyclable construction has a bulk density of greater than 1 g/cubic centimeter, and the article has a density of less than 1 g/cubic centimeter.
  • the more dense recyclable construction will sink in the washwater, while the more dense article will sink, enabling separate collection of the flakes of recyclable construction and the article flakes.
  • a wash-off solution was prepared containing water, and 0.5 wt% sodium hydroxide. Wireless constructions having different carriers were adhered, by an acrylic emulsion based PSA, on several PET or HDPE bottles, where they resided for 72 hours.
  • PET containers to which were attached wireless constructions were ground into flakes, each of which measured 1 cm x 1 cm.
  • This test evaluated the ability of a specific package component to float in room temperature water (cold wash), as well as after exposure to hot water as occurs during hot wash of PET flake during recycling.
  • the density of PET flake is 1.37 g/cm3 and so PET sinks in water. It is generally desirable that other package components such as wireless constructions completely float in water so that they can be cleanly separated from the PET container.
  • Sink-float testing was performed according to a modified version of the APR (The Association of Plastic Recycler) test method APR-PET-S-05, titled "PET Packaging Component Sink or Float Evaluation", as described below: [0112] For each example, 50 of the wireless construction bearing flakes were placed into a 250 mL beaker containing 100 mL of the wash solution having a temperature of 75°C (hot wash), or 20°C (cold wash). Each of the wireless constructions included a PP carrier. The wash-off solution containing the flakes was agitated by a pitch blade at 1000 rpm for 15 minutes to separate the PET container flakes from the wireless construction.
  • APR The Association of Plastic Recycler test method APR-PET-S-05, titled "PET Packaging Component Sink or Float Evaluation"

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  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)

Abstract

L'invention concerne des constructions sans fil recyclables, ainsi que des procédés de fabrication et des procédés d'utilisation des constructions recyclables.
PCT/IB2024/056233 2023-06-30 2024-06-26 Constructions sans fil recyclables Pending WO2025003922A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202363511448P 2023-06-30 2023-06-30
US63/511,448 2023-06-30
US202363610594P 2023-12-15 2023-12-15
US63/610,594 2023-12-15

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WO2025003922A1 true WO2025003922A1 (fr) 2025-01-02

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EP0618947A1 (fr) 1991-12-24 1994-10-12 Avery Dennison Corporation Adhesifs autocollants decollables pour substrats recyclables
US5508367A (en) 1993-11-29 1996-04-16 Adhesives Research, Inc. Water-soluble pressure sensitive adhesive
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US20060145860A1 (en) * 2004-12-20 2006-07-06 3M Innovative Properties Company Environmentally friendly radio frequency identification (RFID) labels and methods of using such labels
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WO2017077184A1 (fr) * 2015-11-02 2017-05-11 Upm Raflatac Oy Film protecteur et étiquette adhésive comprenant le film protecteur
US10590315B2 (en) 2006-11-02 2020-03-17 Avery Dennison Corporation Emulsion adhesive for washable film
WO2022053346A1 (fr) * 2020-09-10 2022-03-17 Etifix Gmbh Étiquette rfid
CN115273646A (zh) * 2022-08-18 2022-11-01 齐克庞德电子(江苏)有限公司 一种贴设在pet材料上的电子防盗软标签及pet材料回收方法
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US20230013517A1 (en) * 2018-11-15 2023-01-19 Avery Dennison Retail Information Services Llc Recyclable rfid transponder components and production methods for same

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EP0618947A1 (fr) 1991-12-24 1994-10-12 Avery Dennison Corporation Adhesifs autocollants decollables pour substrats recyclables
US5508367A (en) 1993-11-29 1996-04-16 Adhesives Research, Inc. Water-soluble pressure sensitive adhesive
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US20060145860A1 (en) * 2004-12-20 2006-07-06 3M Innovative Properties Company Environmentally friendly radio frequency identification (RFID) labels and methods of using such labels
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US20230013517A1 (en) * 2018-11-15 2023-01-19 Avery Dennison Retail Information Services Llc Recyclable rfid transponder components and production methods for same
US20220356375A1 (en) * 2019-06-28 2022-11-10 Upm Raflatac Oy Density adjustable label
WO2022053346A1 (fr) * 2020-09-10 2022-03-17 Etifix Gmbh Étiquette rfid
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VAN NOSTRAND RHEINHOLD: "Handbook of PSA Technology", 1989, pages: 173

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