EP4688442A1 - Adhésifs à motifs destinés à être utilisés avec une impression par transfert - Google Patents

Adhésifs à motifs destinés à être utilisés avec une impression par transfert

Info

Publication number
EP4688442A1
EP4688442A1 EP24728304.7A EP24728304A EP4688442A1 EP 4688442 A1 EP4688442 A1 EP 4688442A1 EP 24728304 A EP24728304 A EP 24728304A EP 4688442 A1 EP4688442 A1 EP 4688442A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
cured
pattern
curing
height
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
EP24728304.7A
Other languages
German (de)
English (en)
Inventor
Radha Sen
Liviu Dinescu
Jason Rambler
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 Corp
Original Assignee
Avery Dennison Corp
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 Corp filed Critical Avery Dennison Corp
Publication of EP4688442A1 publication Critical patent/EP4688442A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/006—Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/21—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being formed by alternating adhesive areas of different nature
    • 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
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • 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
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C

Definitions

  • This disclosure generally relates to depositing a first curable adhesive in a pattern thereby creating voids, curing the first curable adhesive, depositing a second curable adhesive in the voids of the first curable adhesive and curing the second curable adhesive. More specifically, the disclosure relates to using an ink-jet printer to deposit a first curable adhesive with a viscosity greater than that of a second curable adhesive later deposited.
  • Inkjet printing is a non-impact printing method that utilizes electronic signals to control and direct droplets or a stream of ink to be deposited on media.
  • Current inkjet printing technology involves forcing the ink drops through small nozzles by thermal ejection, piezoelectric pressure or oscillation onto the surface of the media. This technology has become a popular way of recording images on various media surfaces (e.g., paper), for a number of reasons, including, low printer noise, capability of high-speed recording and multi-color recording.
  • Exemplary embodiments relate to a method comprising: depositing a first adhesive in a pattern, wherein the pattern has a length, a width, and a depth and locations with no depth of a first 2 adhesive thereby creating a resultant void; curing the first adhesive; depositing a second adhesive within the resultant void of the pattern; and curing the second adhesive.
  • This embodiment or another exemplary embodiment may provide for the first adhesive to be a pressure sensitive adhesive.
  • This embodiment or another exemplary embodiment may provide for the second adhesive to be a structural adhesive.
  • This embodiment or another exemplary embodiment may provide the height is a first height of the first adhesive and the second adhesive has a second height and wherein the first height is greater than or equal to the second height.
  • This embodiment or another exemplary embodiment may provide the curing of the first adhesive occurs through actinic radiation.
  • This embodiment or another exemplary embodiment may provide the curing of the second adhesive occurs through actinic radiation.
  • This embodiment or another exemplary embodiment may provide a viscosity of the first adhesive is greater than a viscosity of the second adhesive.
  • This embodiment or another exemplary embodiment may provide the depositing the first adhesive occurs through an ink-jet printer.
  • This embodiment or another exemplary embodiment may provide the depositing the second adhesive occurs through an ink-jet printer.
  • This embodiment or another exemplary embodiment may provide the resultant void is shaped like a polygon in cross section along the width and length.
  • Another exemplary embodiment relates to a first cured adhesive applied in a pattern to a substrate, wherein the pattern includes a plurality of voids; and a second cured adhesive applied within the plurality of voids of the first adhesive.
  • This embodiment or another exemplary embodiment may provide the first cured adhesive was a UV-curable adhesive prior to being cured.
  • This embodiment or another exemplary embodiment may provide the first cured adhesive is a pressure sensitive adhesive.
  • This embodiment or another exemplary embodiment may provide the second cured adhesive was a UV- curable adhesive prior to being cured.
  • This embodiment or another exemplary embodiment may provide the second cured adhesive is a structural adhesive.
  • This embodiment or another exemplary embodiment may provide the first cured adhesive has a first height and the second cured adhesive has a second height and wherein the first height is greater than or equal to the second height.
  • This embodiment or another exemplary embodiment may provide the first cured adhesive prior to curing has a viscosity greater than the second cured adhesive prior to curing.
  • This embodiment or another exemplary embodiment may provide the pattern of the first cured adhesive is grid shaped.
  • This embodiment or another exemplary embodiment may provide the pattern of the second cured adhesive is polygon shaped when viewed in cross section along the width and length.
  • This embodiment or another exemplary embodiment may 3 provide the pattern of the second cured adhesive is rectangle shaped when viewed in cross section along the width and length.
  • Figure 1 depicts a schematic prior art set up of a standard transfer print mechanism.
  • Figure 3 depicts a schematic set up of an exemplary embodiment of a transfer print mechanism.
  • Figure 4 depicts a flow chart of the exemplary embodiment of a transfer print mechanism.
  • Figure 5 depicts an exemplary patterned adhesive in accordance with at least one exemplary embodiment.
  • Figure 6 depicts an additional exemplary patterned adhesive in accordance with at least one exemplary embodiment.
  • Figure 7 depicts a schematic set up of an alternative exemplary embodiment of a transfer print mechanism.
  • Figure 8 depicts a schematic set up of an yet another alternative exemplary embodiment of a transfer print mechanism.
  • pattern refers to a three-dimensional deposition on a surface with a length, width and depth. 4
  • void refers to a three-dimensional space on a surface uncovered by the pattern.
  • the spaces created by the length, width, and depth of the pattern define a resultant void within the pattern.
  • regular pattern means the evenness, consistency, and/or balance in shape, including consistent length, widths, and depths; arrangement, and/or pattern orientation variation and homogeneity that is repeating.
  • interleave pattern means a pattern that is not even or balanced in shape, including consistent length, widths, and depths; arrangement, and/or pattern orientation variation and heterogeneity that is non-repeating.
  • peelat pattern means the pattern of adhesive is regular in terms of shape including consistent length, widths, and depths; arrangement and/or pattern orientation and heterogeneity is repeating.
  • gsm means grams per square meter.
  • the embodiments described herein contain two or more UV-curable or actinic curable adhesives.
  • the adhesive(s) can be a PSA, a non-pressure sensitive adhesive, a hot-melt adhesive, or combinations thereof.
  • the first adhesive is a PSA.
  • the PSA may be any known PSA.
  • the PSA is a solvent type adhesive, an emulsion type adhesive, or non-emulsion type adhesive. In some embodiments, the PSA is an emulsion adhesive. Hot melt PSAs may also be used.
  • the adhesive may be acrylic or any other useful adhesive which has the hardness and adhesive properties needed for the laminates and/or adhesive coated facestocks.
  • the adhesive should have a hardness sufficient to prevent the adhesive squeezing out of the laminate or article during processing. 5
  • PSAs may be found in (1) Encyclopedia of Polymer Science and Engineering, Vol.
  • the PSAs may be a solvent based or may be a water based adhesive.
  • Conventional PSAs, including acrylic-based PSAs, rubber-based PSAs and silicone-based PSAs may be used in the laminates/constructs described herein.
  • the pressure sensitive adhesive contains an acrylic emulsion adhesive.
  • the pressure sensitive adhesive is prepared by polymerizing alkyl acrylates, vinyl esters, diesters of dicarboxylic acids and unsaturated acids.
  • the alkyl acrylates typically contain from about 2 to about 12, or from about 4 to about 8 carbon atoms in the alkyl group.
  • Examples of alkyl acrylates include, but are not limited to, ethyl, n-butyl, hexyl, 2-ethylhexyl, and isooctyl acrylates, with 2-ethylhexyl acrylate preferred.
  • the alkyl acrylates are present in an amount of at least about 35%. In some embodiments, the alkyl acrylates are present in an amount from about 35% to about 60% by weight.
  • the vinyl esters typically have from about 2 to about 12, or from about 4 to about 8 carbon atoms in the alkyl group.
  • Examples of vinyl esters include, but are not limited to, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl versatate and the like, with vinyl acetate being preferred.
  • the vinyl esters are present in an amount from about 15% to about 35% or from about 20% to about 25% by weight.
  • the diesters of the dicarboxylic acids include alkyl esters of unsaturated diacids, such as maleic acid or anhydride and fumaric acids.
  • the alkyl group generally contains from about 2 to about 20, or from about 4 to about 16, or from about 6 to about 12 carbon atoms.
  • diesters of diacids include, but are not limited to, butyl, octyl fumarate; hexyl, decyl maleate; di-2-ethyl hexyl maleate; dibutyl fumarate; and di-2-ethylhexyl fumarate and mixtures thereof.
  • the diesters of diacids are present in an amount from about 20% to about 35% by weight.
  • the unsaturated acids generally contain from about 2 to about 12, or from about 2 to about
  • the unsaturated acids include, but are not limited to, acrylic acid, methacrylic 6 acid, itaconic acid, and the like. In some embodiments, the unsaturated acids are present in an amount up to 5% or from about 1% to about 3% by weight.
  • the second adhesive is a structural adhesive.
  • a structural adhesive refers to an adhesive that forms an interfacial bond having greater bond strength (adhesive strength) than the cohesive strength of either the substrate or the adhesive itself, or both.
  • the structural adhesive forms chemical bonds with, for example, polar groups located on a substrate surface.
  • the adhesive bond may be tenacious and can be selected to be resistant to aggressive agents or environments, such as solvents or acids in the case of agents, and temperature extremes in the case of environment.
  • Other structural adhesives may be employed, alone or in combination with the noted structural adhesives, that can strongly, but not permanently bond to a substrate surface.
  • the bond strength can be determined by, for example, the selection of materials.
  • the structural adhesive may be a permanent and difficult to remove adhesive that is chemically bonded to a substrate surface. Upon removal of the adhesive, the underlying substrate can potentially be destroyed.
  • the coat weight of adhesives may be between 2 and 100 gsm.
  • the laminates described herein may include one or more release liner(s).
  • the liner may have a first side, a second side opposed to the first side, a first edge, and a second edge opposed to the second edge.
  • the liner may be any useful liner which provides necessary support and release properties.
  • the liner may be made of, or from, a variety of materials including, but not limited to, paper or polymer film liners.
  • the caliper of the paper is sufficient to die cut the resulting laminate or article.
  • liner calipers can range from about 18 mm to 23 mm for PET liners.
  • the liner has lay flat properties.
  • the liner has a machine glaze or finish.
  • the liner has a silicone hold out layer. The hold out layer provides adhesion between the release coating and the release liner. The silicone holdout layer also prevents the silicone release coating from soaking into the liner. 7
  • the release liner includes a liner having a release coating.
  • the release coating of the release liner provides a releasable bond with the PSA or other adhesive.
  • the release coating may be any composition which provides a desired releasable bond strength.
  • the release coating is a silicone release coating.
  • the release coating can be prepared by curing silicone polymers in the presence of a control release agent.
  • the control release agent is a copolymer of a monofunctional silicone unit of the formula
  • R is an alkyl or alkenyl group.
  • the alkyl or alkenyl groups contain from about 1 to about 12, or from about 1 to about 6 carbon atoms.
  • Non-limiting examples of alkyl and alkenyl groups include methyl, ethyl, propyl, butyl, hexyl, ethenyl, propenyl, butenyl and hexenyl groups.
  • the control release agent is typically reacted with a polysiloxane.
  • the polysiloxane may be any polysiloxane which is useful in forming a release coating.
  • useful polysiloxanes include, but are not limited to, vinyl terminated, hydroxy terminated and epoxy terminated polysiloxanes.
  • the polysiloxane is a functional polydialkyl siloxane, wherein the alkyl group contains from about 1 to about 6 carbon atoms.
  • the alkyl groups independently include, but are not limited to, methyl. ethyl, propyl, butyl, pentyl, hexyl groups or mixtures thereof.
  • the alkyl or alkenyl group contains from 1 to about 12, or from 1 to about 6 carbon atoms.
  • the polysiloxane typically has a viscosity average molecular weight of greater than 300,000 centipoise (cps). In another embodiment, the polysiloxane has a viscosity molecular weight from about 300,000 to about 1,000,000 or more.
  • the polysiloxane may be represented by the formula (I):
  • the release coating is prepared with a cross linking agent.
  • the cross linking agent is a reactive polysiloxane, such as a polydialkyl or polyhydroalkyl siloxane.
  • the alkyl groups are the same as those described above.
  • the release coating may be applied in a solvent, solvent-less or emulsion form.
  • the release coating may be cured by any known curing process, e.g. thermal, radiation, etc., to form the 8 release coating.
  • the curing may be catalyzed by silicone soluble complexed compounds of Group VIII transition metals, such as platinum.
  • release agents include, but are not limited to, GE SS-4335, a silicone release agent in unreactive solvent.
  • commercially available polysiloxanes include, but are not limited to, GE SS-4331, a vinyl terminated polydimethyl siloxane.
  • Commercially available linking agents include, but are not limited to, GE SS-4300C, a polymethyvinyl siloxane.
  • Exemplary catalysts include, but are not limited to, SS-8010 catalyst in toluene. These materials are available commercially from General
  • Suitable face materials include, but are not limited to, synthetic papers such as polyolefin type and polystyrene type; various plastic films or sheets such as polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene, polyurethane, polymethacrylate and polycarbonate. Additional examples of suitable face materials include paper and cardboard.
  • the face material may be, or may include, a multilayer polymeric sheet. The multi-layers may be coextruded, or the multi-layers may be laminated together. In one embodiment, the face material includes both co-extruded multi-layers and laminated multi-layers.
  • a white opaque film may be formed by adding a white pigment to one or more of the aforementioned synthetic resins and used as the face material.
  • a foamed film is used as the face material.
  • the foamed film may be formed by a conventional foaming operation.
  • the face material may be a laminated body formed by combining a plurality of single layered sheets composed of the above listed materials. Examples of such a laminated body may include the combination of cellulose fiber paper with synthetic paper, and a laminated body of combined cellulose fiber paper with a plastic film or sheet.
  • the face 9 material includes coated and uncoated papers, metalized papers, aluminum foil, laminated paper and paper with a polymeric material extruded onto the surface of the paper.
  • the face material can be coated with a liquid absorbent material.
  • the selected face material may be porous or semi-porous.
  • the face material may exhibit certain visibility characteristics such as opaqueness, color, and/or brightness.
  • the face material may include water or other liquid absorbency properties.
  • the face material may be electrically conductive and/or include electrically conductive coatings or regions.
  • a wide array of commercially available face materials can be used such as for example those available under the designation TESLIN.
  • the thickness of the face material is optionally determined with reference to application specific criteria. Such criteria may include the desired end use.
  • the sheet thickness is in a range of from about 10 pm to about 300 pm.
  • the sheet thickness is in a range of from about 20 pm to about 200 pm.
  • the sheet thickness is in a range of from about 30 pm to about 150 pm.
  • a primer treatment or a corona discharging treatment or a plasma treatment may be used on the face material to increase a bonding strength between the face material and a dried topcoat composition to be formed on a surface of the face material.
  • the face material exhibits one or more functions or functional characteristics.
  • the face material may be selected to enable or promote an indication such as a visual indication of a liquid, outgassing such as directing or allowing flow of air or gas across a thickness of the face material, water or liquid retention within the face material, electrical discharge or conductivity of the face material, chemical delivery across a thickness of the face material, passage of sound across a thickness of the face material, and/or combinations of these functions or characteristics.
  • the adhesive coated face material and/or laminates described herein can include one or more additional layers or components.
  • additional layers or components include protective layers, tie coat layers, clear layers, color layers, white layers, reflective layers, fluid transfer layers, strength promoting layers, topcoats, print receptive layers, print containing layers, indicia layers, functional layers, and the like. 10
  • the laminates described herein may have specific and useful properties or functionalities.
  • the techniques described herein enable formation of laminates in which transfer, propagation, and/or migration of liquid, gas, sound waves, electrical current, and/or other agents or elements can occur and is controlled across or through the laminate in a Z-direction.
  • Z- direction refers to a direction across a thickness dimension of a laminate or portion thereof, and thus references to "X-direction” and/or “Y-direction” refer to directions perpendicular to the
  • Non-limiting representative examples of laminates having certain functionalities which are provided by the present subject matter include liquid indicator laminates, outgassing laminates, water absorbent laminates, sound channeling laminates, electrically conductive laminates, and laminates having combinations of these functionalities and/or laminates having combinations of one or more of these functionalities and additional functionalities.
  • a liquid indicator laminate can be produced such that the speed of the indicator color change is linked to the facestock selection and porous adhesive properties.
  • a discontinuous structure such as resulting from pores in the adhesive layer or region(s), can allow, for example, liquid to channel through the discontinuous adhesive from one side of the adhesive to the other side and create a permanent discoloration when a dye or other agent in a functional coating in the laminate is dissolved.
  • a liquid indicator laminate is provided.
  • the speed or rate of the indicator color change is linked to the facestock properties such as for example absorbency of liquid, and porosity of the pattern adhesive in the Z-direction.
  • the indication typically is irreversible and can be measured by color change or by a simple visual comparison.
  • the discoloration of a face or region of the laminate can be measured and quantified by optical change, such as by CIE Lab or by a simple visual comparison.
  • the discoloration can be permanent or nonpermanent.
  • the discoloration can also be temporary and revert to an initial state after passage of a period of time. In some embodiments, the period of time is predetermined. 11
  • This phenomenon of transport through discontinuities in an adhesive in the Z-direction can be implemented in other label applications and particularly pressure sensitive adhesive labels, such as for example, labels for outgassing substrates such as by air channeling in the Z-direction, moist substrate labeling such as by liquid channeling in the Z-direction, electrical discharge in the Z-direction, chemical delivery from one layer to another in the Z-direction, and/or sound channeling in the Z-direction.
  • This phenomenon enables passage, transfer, and/or migration of a medium or agent from one side of an adhesive region of a laminate, to another side of the adhesive region.
  • medium penetration or transport is noted as being in the Z-direction, it will be understood that the present subject matter is not limited to such and may also include penetration/transport in the X-direction and/or Y-direction.
  • the laminates described herein include a layer or region of a secondary adhesive.
  • the secondary adhesive is typically utilized to adhere the laminate to a substrate of interest.
  • the secondary adhesive may contain one or more adhesives which are the same or different than the adhesive of the patterned or porous adhesive. Description of representative examples of secondary adhesives are provided herein.
  • the primary adhesive may be coated onto the facestock, the secondary adhesive may be coated onto the release liner, and the coated adhesive and release liner may be laminated together such that the primary and secondary adhesives are in direct contact with each other.
  • both the primary and secondary adhesive may be coated on the facestock or the release liner, then laminated together.
  • the layering of the primary and secondary adhesive relative to the facestock and the release liner may be either facestock, primary adhesive, secondary adhesive, and release liner or facestock, secondary adhesive, primary adhesive, release liner. Regardless of the order of primary and secondary adhesive, it is contemplated that at least one of the primary and secondary adhesive is patterned, taking into consideration that the other adhesive may be continuous.
  • an array of different arrangements of layers and components may be utilized.
  • the patterned adhesive e.g., the layer of discontinuous adhesive
  • that layer is disposed between a functional facestock and a liner or functional layer.
  • the patterned adhesive may be disposed between the functional facestock and the layer or region of functional agent that is sensitive to liquid passing through the laminate.
  • the layer or region of the functional agent may be disposed between the patterned adhesive and the carrier layer. 12
  • Utilization of the techniques and features described herein enable production of adhesive laminates and/or adhesive coated face materials with fluid/air management characteristics, controlled removability, and/or unique thermal and/or electrical conductivity.
  • use of these techniques and features enable reductions in materials, e.g., adhesives, and thus enable cost savings.
  • the present subject matter includes the adhesive coated face materials and laminates described herein which are formed by other methods than the methods described herein.
  • the top coat coating is deposited on the substrate by any suitable method.
  • the suitable method includes any suitable coating technology.
  • Embodiments include depositing the coating on the substrate by any suitable liquid deposition method.
  • suitable methods include bath coating, spray coating, slot coating, spin coating, curtain coating, gravure coating, reverse gravure print coating, reverse roll coating, knife over roll (i.e., gap) coating, metering (Meyer) rod coating, air knife coating, or any combinations thereof.
  • Bath coating includes immersion or dip in the aqueous solution.
  • the coating is deposited by bath in the aqueous solution.
  • the coating is deposited by spray of the aqueous solution.
  • FIG. 2 illustrate a general example, of such a process (200).
  • the general example utilizes a transfer mechanism that the components of the label are first applied to and then is used to transfer those components onto the desired substrate.
  • a release coat 100 is deposited onto the transfer mechanism 102 (Step 202) with an ink layer 104 and then a binding layer 106 is deposited (Step 204) on 13 top of ink layer 104.
  • Ink layer 104 and/or binding layer 106 are then dried and/or cured (Step 206) while attached to transfer mechanism 102, and ink layer 104 and binding layer 106 are then applied (Step 208) to a substrate 108 as the adhesive of binding layer 106 contacts substrate 108 on a roller or other similarly situated mechanism.
  • transfer mechanism 102 is utilized to house the components of the label
  • the transfer mechanism may be utilized again and again thereby reducing the amount of waste typically associated with such methods.
  • the transfer mechanism 102 used comprises a moving conveyer belt or sheet feed.
  • transfer mechanism 102 may be a diaphragm constructed on a moving conveyer belt or in a sheet feed system to aid in the process of the application of the necessary label components onto the substrate and then to repeat to process.
  • the conveyer belt may be continuously moving or may utilize a batch-movement process, or a semi-batch movement process, depending on the specifications of the user.
  • Transfer mechanism 102 may be constructed of any material or materials that allow for the various label components to be transferred on and off transfer mechanism 102 and allow for transfer mechanism 102 to maintain its shape during the application of the label components but further allow flexibility to conform to the shape of the substrate.
  • a diaphragm is used for the construction of transfer mechanism 102, it may include a textured or matte surface to increase the ease of releasibility of the label components to the substrate.
  • suitable materials for the construction of the belt that provide enhanced release qualities as well as the desired flexibility may include silicone, fluorinated polymers, or low surface energy polymers including polyamide, Teflon*, polyolefin, and others. Such materials may be utilized to construct the entirety of the diaphragm or may serve as coatings (such as those shown as 100) on the diaphragm depending on the user's specifications. Examples of suitable silicone coated release materials include, D2 CL PET
  • the surface energy of transfer mechanism 102 on the side that makes contact with the label components may be between about 20 mN/m and about 40 mN/m.
  • additional items including corona treatment or flame treatment, may be added to transfer mechanism 102 to ensure the proper surface energy.
  • Ink layer 104 utilized in the methods may include ink or graphics, and may be a mono-colored or multi-colored ink layer depending on the printed message and/or the intended pictorial design. Such designs for use in connection with the present methods include serial numbers, bar codes, trademarks. etc.
  • the present methods may utilize a variety of commercially available inks for use in ink layer
  • examples of these inks include Sun Sheen* (a product of Sun Chemical, Inc. of Santa Fe Springs, CA identified as an alcohol dilutable polyamide ink), Suntex MP (a product of Sun Chemical, Inc. identified as a solvent-based ink formulated for surface printing acrylic coated substrates, PVDC coated substrates and polyolefin films), X-
  • Ink layer 104 may range from about 0.5 to about 10 pm. Further, the thickness of ink layer 104 may range from about 1 to about 5 pm, and, furthermore, the thickness of ink layer 104 may be about 3 pm.
  • release coating 100, ink layer 104 or binding layer 106 to transfer mechanism 102 or other such layers may be accomplished by various methods known and apparatuses
  • inkjet printing screen printing, or coating.
  • the ink layer may be deposited through raster graphics or bitmap imaging, which is sometimes referred to in the printing and prepress industries as contone or contone printing.
  • a thermal inkjet printer or piezo inkjet printer may be utilized to apply ink layer 104 to transfer mechanism 102.
  • the ink of ink layer 104 utilized in the method should be of a suitable viscosity when passing through the printhead of such printers to ensure an accurate and durable image.
  • thermal inks may include a viscosity of between about 3 and about 5 mPa/s at 25 °C
  • piezo inkjet fluids may include a viscosity in the range of about 1 to about 30 mPa/s at 25 °C.
  • Binding layer 106 may be constructed of inkjettable adhesives to meet the demands of the method utilized.
  • binding layer 106 may be constructed of monomers, including those of acrylic, epoxy, silicone, vinyl, and olefinic based chemistries. Oligomers or short chain polymers may be utilized in connection with binding layer 106. Short chain polymers that may be beneficial in connection with binding layer 106 refers to polymers where number average molecular weight (Mn) is less than the entanglement molecular weight (Me) for the respective monomeric systems.
  • Mn number average molecular weight
  • Me entanglement molecular weight
  • the materials utilized as binding layer 106 may include a viscosity range between about 5 to about 50 mPa-s.
  • inkjettable adhesives are utilized in connection with binding layer 106
  • such adhesives may be prepared using any known methods in the art including, emulsion, solvent or solvent-less polymerization techniques, where such inkjettable adhesives may be processed using a solvent, water or a heated nozzle.
  • the user's specifications may dictate the necessary methods utilized for such preparation and processing.
  • the inkjettable adhesives utilized in connection with binding layer 106 may be based on a two-component adhesive system where a first component is jetted through a first nozzle and a crosslinking or curing agent (second component) is jetted through a second nozzle onto the first component.
  • first and second component pairs include epoxy oligomers & resins and amine oligomers; epoxy oligomers & resins and acid catalysts; epoxy oligomers and basic catalysts; and oligomers with isocyanate functional groups and alcohols, catalysts, or moisture.
  • one component of the two components may be coated/printed/fabricated onto the desired surface/media using additional nonjettable technique, including gravure printing, screen printing, casting, spin coating, die-coating etc. 16
  • one of the two components may be situated in ink layer 104 to provide the same effect.
  • first PSA two specific adhesive systems are used, a first PSA, and a second structural adhesive.
  • Each adhesive is UV-curable or actinic radiation curable.
  • This method is described in Figures 3-8.
  • Figure 3 shows a transfer mechanism 300 overlaid with a plurality of depositors 302 and optionally curing devices 304, while Figure 4 diagrammatically sets out the process 400.
  • a first depositor 302A is operative to deposit a release coating 306 onto the transfer mechanism 300 (Step 402).
  • it can be UV cured, by first curing device 304A, (Optional Step 404) or may not need to be.
  • the curing devices 304 can be any known mechanism.
  • the devices in the case of UV curing, the devices
  • the transfer mechanism 300 moves onto a second depositor 302B where at least one ink layer 308 can be deposited onto the release coating 306 (Step 406) and potentially cured by a second curing device 304B (Optional Step 408).
  • the transfer mechanism 300 moves onto a third depositor 302C where a first adhesive
  • Step 410 can be deposited onto the ink layer (Step 410) and potentially cured by a third curing device 304C
  • the first adhesive 310 is deposited in a regular and repeating pattern onto the ink layer.
  • this pattern is a grid like shape as seen in Figure 5.
  • This grid shape results in an internal void 316 defined by the absence of adhesive in a depth, width and length of the first adhesive 310.
  • this regular and repeating pattern is the result of the method and execution of the deposition in the exemplary embodiment, it is possible for other patterns to be used in the desired implementation.
  • These other patterns may include, but are not limited to any hollow polyhedral shapes with similarly situated voids that have a polygon as its approximated shape when viewed in cross section along the width and length, thus making the underlying polyhedron a prismatic.
  • the approximated shape when viewed in cross section along the width and length is a hollow square.
  • the transfer mechanism moves onto the fourth depositor 304D where a second adhesive 312 can be deposited onto the ink layer (Step 414) and potentially cured by a fourth curing device 17
  • the second adhesive 312 is deposited in a regular and repeating pattern onto the ink layer.
  • this pattern is a checker board like shape as seen in Figure 6.
  • This checker board shape results in filling at least a portion of the internal voids 316 defined by the absence of first adhesive 310 by covering in width and length while equal to or less than of the depth of the first adhesive 310. While this regular and repeating pattern is the result of the method and execution of the deposition in the exemplary embodiment, it is possible for other patterns to be used in the desired implementation.
  • the pattern of the second adhesive 312 is meant to mirror that, or rather fill the resultant void 316 of the pattern of the first adhesive 310.
  • These other patterns may include, but are not limited to any solid polyhedral shapes with similarly situated voids that have a polygon as its approximated shape when viewed in cross section along the width and length, thus making the underlying polyhedron a prismatic. For example, in the exemplary embodiment as is shown in Figure 6, the approximated shape when viewed in cross section along the width and length is a solid square.
  • the first adhesive 310 deposition and subsequent cure results as a container for the second adhesive 312 to restrain the potential spread of the second adhesive. Therefore, potential second adhesives 312 that would have too low of viscosity to be reasonably workable under normal conditions prior to curing, are now able to remain specifically in one section prior to cure without risk of flowing to undesirable locations.
  • the first adhesive 310 is a PSA while the second adhesive 312 is a structural adhesive.
  • the second adhesive 312 has a viscosity lower than the first adhesive after the first adhesive is cured.
  • Step 420 before being removed from the transfer mechanism 300 and attaching to a substrate 314 (Step 420).
  • the resultant dual cured adhesive and ink containing material may be saved for future use prior to immediate application.
  • the cure of the second adhesive 312 (Optional Step 416) and could be removed.
  • this step could instead be a UV cure that could occur nearly simultaneously to removal of the transfer mechanism 300.
  • the cure is a UV cure it must be done through a transparent web liner and color layer with respect to the curing wavelength.
  • the second adhesive 312 is deposited onto a wrapped film 400 by a fourth depositor 402D.
  • the result is a structural adhesive wet film.
  • This fourth depositor is located sufficiently adjacent to a roll 414. The roll then rotates and is put into contact, allowing the second adhesive 312 to be placed within the voids of the pattern of the first adhesive
  • the resultant now has both adhesives 310, 312 and is exposed to a final curing mechanism 404D, rather than a series of individual cures followed by a final cure in the prior embodiments.
  • the resultant material with both the first adhesive 310 and second adhesive 312 being cured may be applied to the roll and the whole construction may be self wound and resultant dual cured adhesive and ink containing material may be saved for future use prior to immediate application, or depending on the desired implementation the material may be immediately used.
  • the first adhesive 310 is deposited using a depositor 502C while the second adhesive 312is present on as a modified wrap transfer with the second adhesive 312 as a primer.
  • the resultant wrap is then merged with the release potion and color portion near simultaneously to curing 504C.
  • the resultant material with both the first adhesive 310 and second adhesive 312 being cured may be applied to the roll and the whole construction may be self wound and resultant dual cured adhesive and ink containing material may be saved for future use prior to immediate application, or depending on the desired implementation the material may be immediately used.
  • the phrase "at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements.
  • This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified.
  • At least one of A and B can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than
  • An embodiment is an implementation or example of the present disclosure.
  • Reference in the specification to "an embodiment,” “one embodiment,” “some embodiments,” “one particular embodiment,” or “other embodiments,” or the like, means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least some embodiments, 20 but not necessarily all embodiments, of the invention.
  • the various appearances “an embodiment,” one embodiment,” “some embodiments,” “one particular embodiment,” or “other embodiments,” or the like. are not necessarily all referring to the same embodiments.
  • a numeric value may have a value that is +/ ⁇ 0. % of the stated value (or range of values), +/-!% of the stated value (or range of values), +/ ⁇ 2% of the stated value (or range of values), +/-5% of the stated value (or range of values).
  • any method of performing the present disclosure may occur in a sequence different than those described herein. Accordingly, no sequence of the method should be read as a limitation unless explicitly stated. It is recognizable that performing some of the steps of the method in a different order could achieve a similar result.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Adhesive Tapes (AREA)

Abstract

Selon un mode de réalisation donné à titre d'exemple, la présente divulgation concerne la formation de motifs sur des adhésifs dans un environnement d'impression par transfert. Le procédé comprend généralement le dépôt d'un premier adhésif durcissable sur un motif, créant ainsi des vides, le durcissement du premier adhésif durcissable, le dépôt d'un second adhésif durcissable dans les vides du premier adhésif durcissable et le durcissement du second adhésif durcissable. Des propriétés bénéfiques peuvent être obtenues grâce à l'utilisation de la formation de motifs d'adhésifs et à l'aide de multiples adhésifs.
EP24728304.7A 2023-05-11 2024-05-09 Adhésifs à motifs destinés à être utilisés avec une impression par transfert Pending EP4688442A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363501494P 2023-05-11 2023-05-11
PCT/IB2024/054524 WO2024231878A1 (fr) 2023-05-11 2024-05-09 Adhésifs à motifs destinés à être utilisés avec une impression par transfert

Publications (1)

Publication Number Publication Date
EP4688442A1 true EP4688442A1 (fr) 2026-02-11

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EP (1) EP4688442A1 (fr)
CN (1) CN121100064A (fr)
WO (1) WO2024231878A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5183459A (en) 1989-08-14 1993-02-02 Avery Dennison Corporation Emulsion pressure-sensitive adhesive polymers in bandage and medical tape constructions
US5264532A (en) 1989-08-14 1993-11-23 Avery Dennison Corporation Emulsion pressure-sensitive adhesives
DE69008334T2 (de) 1989-08-14 1994-11-03 Avery Dennison Corp., Pasadena, Calif. Emulsion druckempfindlicher klebepolymere mit ausgezeichnetem verhalten bei raum- und niedrigtemperaturen.
US5183841A (en) 1991-12-24 1993-02-02 Avery Dennison Corporation Removable pressure-sensitive adhesives for recyclable substrates
JP5487791B2 (ja) * 2009-08-10 2014-05-07 セイコーエプソン株式会社 転写媒体製造方法、転写媒体
KR102142750B1 (ko) * 2016-12-08 2020-08-10 주식회사 엘지화학 기판의 접착방법 및 이를 통해 제조된 디스플레이용 기판
US11151907B2 (en) * 2018-06-28 2021-10-19 Iconex Llc Labels and rolls with adhesives to stick to moist and dry surfaces
KR102501295B1 (ko) * 2020-08-31 2023-02-21 (주) 대양산업 사계절 점착테이프

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WO2024231878A1 (fr) 2024-11-14

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