WO2020203564A1 - 熱転写シート - Google Patents
熱転写シート Download PDFInfo
- Publication number
- WO2020203564A1 WO2020203564A1 PCT/JP2020/013373 JP2020013373W WO2020203564A1 WO 2020203564 A1 WO2020203564 A1 WO 2020203564A1 JP 2020013373 W JP2020013373 W JP 2020013373W WO 2020203564 A1 WO2020203564 A1 WO 2020203564A1
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- WIPO (PCT)
- Prior art keywords
- layer
- transfer
- release layer
- transfer sheet
- thermal transfer
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
- B41M5/38214—Structural details, e.g. multilayer systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
- B41M5/395—Macromolecular additives, e.g. binders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/41—Base layers supports or substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/06—Printing methods or features related to printing methods; Location or type of the layers relating to melt (thermal) mass transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/38—Intermediate layers; Layers between substrate and imaging layer
Definitions
- This disclosure relates to a thermal transfer sheet.
- thermal transfer sheet for transferring the transfer layer onto the transferred body.
- a thermal transfer sheet provided with a single-layer structure or a laminated structure transfer layer including a protective layer on one surface of the base material, and (ii) a single layer having a receiving layer on one surface of the base material.
- a thermal transfer sheet provided with a layered or laminated transfer layer, a single-layer structure containing a molten layer on one surface of the (iii) base material, a thermal transfer sheet provided with a laminated transfer layer, and the like are known. Has been done.
- the thermal transfer sheet of (i) may also be referred to as a protective layer transfer sheet.
- the thermal transfer sheet of (ii) may also be referred to as an intermediate transfer medium.
- the transfer layer of these thermal transfer sheets is transferred onto the transferred body by superimposing the transferred body and the thermal transfer sheet and heating the other surface of the base material by a heating means.
- Patent Document 1 proposes a thermal transfer sheet or the like in which a release layer is provided between a base material and a transfer layer.
- a thermal transfer sheet having a transfer layer is required to have good foil breakability when transferring the transfer layer and good foil retention of the transfer layer.
- the main object of the present disclosure is to provide a thermal transfer sheet having good foil breakability of the transfer layer and good foil retention of the transfer layer.
- the thermal transfer sheet according to the embodiment of the present disclosure is a thermal transfer sheet in which a base material, a release layer, and a transfer layer are laminated in this order, and the distance between the release layer and the transfer layer is the transfer layer. It is a transfer interface, and the release layer contains an acid-modified polyolefin.
- the thermal transfer sheet according to the embodiment of the present disclosure has good foil breakability of the transfer layer and good foil retention of the transfer layer.
- thermal transfer sheet according to the embodiment of the present disclosure (hereinafter, referred to as the thermal transfer sheet of the present disclosure) will be described.
- the heat transfer sheet 100 of the present disclosure has a base material 1, a release layer 2 provided on the base material 1, and a transfer layer 10 provided on the release layer 2.
- 1 to 4 are schematic cross-sectional views showing an example of the heat transfer sheet 100 of the present disclosure.
- the base material 1 constituting the thermal transfer sheet 100 of the present disclosure holds the release layer 2 provided on the base material 1 and the transfer layer 10 provided on the release layer 2.
- Examples of the base material include various films, various sheets, and various cards.
- the material of the base material 1 is not limited, and polyester such as polyethylene terephthalate, polyarylate, polycarbonate, polyurethane, polyimide, polyetherimide, cellulose derivative, polyethylene, ethylene-vinyl acetate copolymer, polypropylene, polystyrene, acrylic, polyvinyl chloride.
- Vinyl, polyvinylidene chloride, polyvinyl alcohol, polyvinyl butyral, nylon, polyether ether ketone, polysulfone, polyether sulfone, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, polyvinyl fluoride, tetrafluoroethylene-ethylene copolymer , Tetrafluoroethylene-hexafluoropropylene copolymer, polychlorotrifluoroethylene, polyvinylidene fluoride and the like can be exemplified.
- Surface treatment may be applied to one surface or both surfaces of the base material 1.
- the base material 1 has a surface treatment on the surface on the release layer 2 side.
- the surface treatment method include corona discharge treatment, flame treatment, ozone treatment, ultraviolet treatment, radiation treatment, roughening treatment, chemical treatment, plasma treatment, low temperature plasma treatment, primer treatment, and grafting treatment. ..
- the surface treatment includes a treatment layer for treating the surface of the base material 1.
- the primer treatment also includes providing a primer layer.
- a base material 1 including a void layer may be used as the base material 1.
- the base material containing a void layer can be preferably used when the transfer layer 10 of the thermal transfer sheet 100 of the present disclosure has a single-layer structure or a laminated structure including a receiving layer.
- the base material 1 having a void layer can form a high-concentration image on the receiving layer.
- a base material or the like having a void inside can be exemplified.
- the void layer is produced by kneading inorganic particles in a polymer and generating voids with the inorganic particles as nuclei when the mixture is stretched, and a polymer that is incompatible with the main resin is mixed. Examples thereof include those in which voids are generated when the mixture is stretched.
- the polymer may be one kind or a plurality.
- the voids contained in the void layer are sometimes referred to as microvoids or vacancies.
- the thickness of the base material 1 is not limited, and is usually 2.5 ⁇ m or more and 100 ⁇ m or less.
- a release layer 2 is provided on the base material 1.
- the base material 1 and the release layer 2 may be in contact with each other, and the base material 1 and the release layer 2 may not be in contact with each other.
- the base material 1 and the release layer 2 are in direct contact with each other.
- a transfer layer 10 is provided on the release layer 2.
- the release layer 2 and the transfer layer 10 are in direct contact with each other.
- the release layer 2 is a layer that remains on the base material 1 side when the transfer layer 10 of the heat transfer sheet 100 of the present disclosure is transferred.
- the thermal transfer sheet having the transfer layer is required to have good foil breakability when the transfer layer 10 is transferred onto the transferred body and to have good foil retention of the transfer layer 10.
- the release layer 2 contains an acid-modified polyolefin.
- the release layer 2 may contain one type of acid-modified polyolefin, or may contain two or more types.
- the heat transfer sheet 100 of the present disclosure having such a release layer 2 can improve the foil breakability of the transfer layer 10 and the foil retention of the transfer layer 10.
- the foil breakability of the transfer layer means the degree of suppression of tailing when the transfer layer is transferred onto the transfer target. When the foil breakability is good, it means that tailing can be suppressed.
- the tailing is a transfer layer that starts from the boundary between the transfer region and the non-transfer region of the transfer layer when the transfer layer is transferred onto the transferred body, and protrudes from the boundary toward the non-transfer region side. Means the phenomenon that is transcribed.
- the foil holding property means the degree of suppression of the transfer layer from falling off when a bending stress is applied to the thermal transfer sheet. When the foil holding property is good, it means that the transfer layer can be suppressed from falling off when bending stress is applied to the thermal transfer sheet.
- the release layer 2 in a preferable form has a melting point of the acid-modified polyolefin contained in the release layer 2 of 75 ° C. or higher.
- the release layer 2 in a preferred form can improve the transferability of the transfer layer 10.
- the release layer 2 in a preferable form has a weight average molecular weight (Mw) of the acid-modified polyolefin contained in the release layer 2 of 50,000 or more.
- Mw weight average molecular weight
- the release layer 2 in a preferred form can improve the transferability of the transfer layer 10.
- the release layer 2 having a more preferable form has an acid-modified polyolefin contained in the release layer 2 having a melting point of 75 ° C. or higher and a weight average molecular weight (Mw) of 50,000 or higher.
- the melting point means a value measured in accordance with JIS-K-7121 (2012).
- the weight average molecular weight (Mw) means a polystyrene-equivalent value measured by GPC (gel permeation chromatography) in accordance with JIS-K-7252-1 (2008).
- the release layer 2 contains an acid-modified polyolefin having a melting point of 90 ° C. or higher and 160 ° C. or lower and a weight average molecular weight (Mw) of 50,000 or higher and 120,000 or lower.
- the release layer 2 contains an acid-modified polyolefin having a melting point of 100 ° C. or higher and 140 ° C. or lower and a weight average molecular weight (Mw) of 50,000 or higher and 120,000 or lower.
- the release layer 2 contains an acid-modified polyolefin having a melting point of 90 ° C. or higher and 160 ° C. or lower and a weight average molecular weight (Mw) of 65000 or higher and 85000 or lower.
- the release layer 2 contains an acid-modified polyolefin having a melting point of 100 ° C. or higher and 140 ° C. or lower and a weight average molecular weight (Mw) of 65000 or higher and 85000 or lower.
- Mw weight average molecular weight
- the release layer 2 contains an acid-modified polyolefin having a melting point of 75 ° C. or higher and lower than 90 ° C. and a weight average molecular weight (Mw) of 50,000 or more and less than 65,000.
- the release layer 2 contains an acid-modified polyolefin having a melting point of 75 ° C. or higher and lower than 90 ° C., and having a weight average molecular weight (Mw) of more than 85,000 and not more than 120,000.
- the release layer 2 of this form can improve the foil holding property of the transfer layer and the foil breaking property of the transfer layer.
- the acid-modified polyolefin is not limited, and examples thereof include polyolefins modified with unsaturated carboxylic acid or its anhydride.
- the modification mode is not limited, and graft modification and the like can be exemplified.
- the carboxylic acid or its anhydride include maleic acid, maleic anhydride, acrylic acid, methacrylic acid, itaconic acid, itaconic anhydride, fumaric acid, and crotonic acid.
- Examples of the polyolefin component forming the acid-modified polyolefin include alkenes having 2 or more and 4 or less carbon atoms.
- Examples of alkenes having 2 or more and 4 or less carbon atoms include ethylene, propylene, 1-butene, 2-butene, 1-pentene, and 1-hexene.
- propylene is preferable.
- the polyolefin component may be cyclic polyolefin.
- the acid-modified polyolefin may be an acid-modified polyolefin crosslinked with a cross-linking agent.
- the release layer 2 of this form can improve the foil holding property of the transfer layer 10 and the foil cutting property of the transfer layer 10.
- the cross-linking agent include oxazoline compounds, carbodiimide compounds, isocyanate compounds, and epoxy compounds.
- the content of the cross-linking agent is preferably 0.8% by mass or less, more preferably 0.5% by mass or less, when the mass of the acid-modified polyolefin is 100% by mass. preferable.
- the release layer 2 of this form can suppress an unintended cross-linking reaction between the cross-linking agent contained in the release layer 2 and the component contained in the transfer layer 10.
- the content of the acid-modified polyolefin is not limited, but the mass of the acid-modified polyolefin with respect to the total mass of the release layer 2 is preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more.
- the amount of acid modification of the acid-modified polyolefin is preferably 1% by mass or more and 5% by mass or less, and more preferably 1.4% by mass or more and 5% by mass or less.
- the release layer 2 of this form has good adhesion. Further, the release layer 2 of this form can improve the adhesion between the base material 1 and the release layer 2 without providing a layer having adhesiveness between the base material 1 and the release layer 2. That is, the configuration of the thermal transfer sheet can be simplified.
- the adhesive layer include a primer layer and an anchor layer.
- the release layer 2 containing an acid-modified polyolefin in a preferable amount of acid modification is suitable when a base material mainly composed of polyester is used as the base material 1, and a base material mainly composed of polyethylene terephthalate is used as the base material 1.
- the base material 1 mainly composed of polyester is a base material in which it is difficult to sufficiently secure the adhesiveness with the conventional release layer when the base material 1 and the release layer 2 are in contact with each other.
- the term "subject" means that the mass with respect to the total mass of the base material is more than 50% by mass.
- the release layer 2 contains an acid-modified polyolefin and polyvinyl alcohol.
- the release layer 2 of this form can improve the transferability of the transfer layer 10.
- the content of polyvinyl alcohol with respect to the total mass of the release layer 2 is preferably 1% by mass or more and 50% by mass or less, and more preferably 10% by mass or more and 30% by mass or less.
- the release layer 2 of this form can improve the foil holding property of the transfer layer 10 and the foil cutting property of the transfer layer 10. Further, by providing the transfer layer 10 in a preferable form described later on the release layer 2 in this form, all of the transferability of the transfer layer 10, the foil holding property of the transfer layer 10, and the foil breaking property of the transfer layer 10 are all provided. Can be made even better.
- the release layer 2 may contain components other than the components exemplified above.
- Other components include waxes, silicone wax, silicone resin, various silicone-modified resins such as silicone-modified acrylic resin, fluorine resin, fluorine-modified resin, acrylic resin, heat-crosslinkable epoxy-amino resin, and heat-crosslinkable alkyd-amino. Examples thereof include resins, melamine resins, cellulose resins, and urea resins.
- the release layer 2 may contain other components.
- the method for forming the release layer 2 is not limited, and an acid-modified polyolefin or the like is dissolved or dispersed in an appropriate solvent to prepare a coating solution for the release layer, and this coating solution is applied onto the base material 1. Can be formed by drying.
- the coating method for the release layer coating liquid is not limited, and a conventionally known coating method can be appropriately selected and used. Examples of the coating method include a gravure printing method, a screen printing method, and a reverse coating method using a gravure plate. Further, other coating methods can also be used. This also applies to the methods for forming various layers described later.
- the thickness of the release layer 2 is preferably 0.1 ⁇ m or more and 1 ⁇ m or less.
- a transfer layer 10 is provided on the release layer 2.
- the transfer layer 10 can be peeled off from the release layer 2.
- the transfer interface of the transfer layer 10 is between the release layer 2 and the transfer layer 10.
- the transfer interface is sometimes referred to as the exfoliation interface.
- the thermal transfer sheet 100 of the present disclosure can transfer the transfer layer 10 at the transfer interface.
- the transfer layer 10 may have a single-layer structure.
- the transfer layer 10 may have a laminated structure in which a plurality of layers are laminated.
- the thermal transfer sheet 100 as an example of the present disclosure has a single-layer structure or a laminated structure in which the transfer layer 10 includes the protective layer 5.
- 1A and 1B are schematic cross-sectional views showing an example of the heat transfer sheet of the present disclosure.
- the transfer layer 10 in the form shown in FIG. 1A has a single-layer structure including only the protective layer 5.
- the transfer layer 10 in the form shown in FIG. 1B has a laminated structure in which the protective layer 5 and the adhesive layer 6 are laminated in this order from the release layer 2 side.
- the protective layer 5 may be referred to as a release layer.
- the transfer layer 10 having a laminated structure including the protective layer 5 may include other layers.
- the thermal transfer sheet in which the transfer layer 10 includes the protective layer 5 functions as a protective layer transfer sheet.
- the thermal transfer sheet of this form can protect the transferred body by transferring the transfer layer 10 onto the transferred body. Examples of the transferred body include a transferred body having an image.
- the thermal transfer sheet 100 as an example of the present disclosure has a laminated structure in which the transfer layer 10 is laminated with the protective layer 5 and the receiving layer 7 in this order from the release layer 2 side.
- FIG. 2 is a schematic cross-sectional view showing an example of the thermal transfer sheet of the present disclosure.
- the transfer layer 10 in the form shown in FIG. 2 has a laminated structure in which the protective layer 5 and the receiving layer 7 are laminated in this order from the release layer 2 side.
- the transfer layer 10 has a laminated structure including the receiving layer 7, the receiving layer 7 is located on the surface of the transfer layer 10.
- the thermal transfer sheet 100 as an example of the present disclosure has a single-layer structure in which the transfer layer 10 is composed of only the receiving layer 7. This form of thermal transfer sheet functions as an intermediate transfer medium. In this form of the thermal transfer sheet 100, a thermal transfer image is formed on the receiving layer 7 located on the surface of the transfer layer 10, and then the transfer layer 10 is transferred onto the transferred body to produce a printed matter.
- the thermal transfer sheet 100 as an example of the present disclosure has a single-layer structure or a laminated structure in which the transfer layer 10 includes the heat-seal layer 8.
- FIG. 3 is a schematic cross-sectional view showing an example of the thermal transfer sheet of the present disclosure.
- the transfer layer 10 in the form shown in FIG. 3 has a single-layer structure including all of the heat seal layers 8.
- the thermal transfer sheet 100 in this form can impart adhesiveness to the transferred body by transferring the transfer layer 10 onto the transferred body.
- This form of thermal transfer sheet functions as a heat seal panel.
- Examples of the transfer material to which this form of transfer layer is transferred include an intermediate transfer medium in which an image is formed on the receiving layer, a protective layer transfer sheet, and the like.
- the transfer layer 10 of the thermal transfer sheet 100 of the form shown in FIGS. 1A, 2 and 4 by combining the thermal transfer sheet 100 of the form shown in FIGS. 1A, 2 and 4 and the thermal transfer sheet 100 of the form shown of FIG.
- adhesiveness can be imparted to the transfer layer 10 of the thermal transfer sheet 100 of the forms shown in FIGS. 1A, 2 and 4.
- the transfer layer 10 has a laminated structure including the heat seal layer 8, the heat seal layer 8 is located closest to the release layer 2 among the layers constituting the transfer layer 10.
- the thermal transfer sheet 100 as an example of the present disclosure has a single-layer structure or a laminated structure in which the transfer layer 10 includes the molten ink layer 9.
- FIG. 4 is a schematic cross-sectional view showing an example of the thermal transfer sheet of the present disclosure.
- the transfer layer 10 in the form shown in FIG. 4 has a single-layer structure including all of the molten ink layers 9.
- the thermal transfer sheet 100 of the present disclosure is not limited to the above applications, and can be applied to other applications.
- the transfer layer 10 is a transfer layer 10 including a receiving layer 7 and the receiving layer 7 is a layer in contact with the release layer 2, the transfer layer 10 is transferred to the transferee and received on the surface.
- a thermal transfer image receiving sheet on which the layer 7 is located can be manufactured.
- the transfer layer 10 has a laminated structure in which the receiving layer 7 and the adhesive layer 6 are laminated in this order from the release layer 2 side.
- composition of the protective layer 5, the adhesive layer 6, the receiving layer 7, the heat seal layer 8, and the molten ink layer 9 forming the transfer layer 10 of the various forms those conventionally known in the field of the thermal transfer sheet may be appropriately selected and used. Good.
- the components of the protective layer 5 include acrylic resin, polyester, polycarbonate, vinyl resin such as vinyl chloride-vinyl acetate copolymer, ultraviolet absorbing resin, epoxy resin, polystyrene, polyurethane, urethane-modified acrylic, acrylic-modified urethane, and the like.
- vinyl resin such as vinyl chloride-vinyl acetate copolymer
- ultraviolet absorbing resin epoxy resin, polystyrene, polyurethane, urethane-modified acrylic, acrylic-modified urethane, and the like.
- silicone-modified resins silicone-modified resins, mixtures of these resins, ionizing radiation-curable resins, and ultraviolet-curable resins.
- acrylic resin, polyurethane, polyolefin, polyester, epoxy resin, urea resin, melamine resin, phenol resin, vinyl acetate, vinyl resin such as vinyl chloride-vinyl acetate copolymer, cyanoacrylate and the like are used. It can be exemplified. The same applies to the components of the heat seal layer 8.
- the components of the receiving layer 7 include acrylic resin, polyolefin, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, polyester, polystyrene, polyamide, olefin and co-weight of other vinyl polymers. Examples thereof include coalescence, ionomer, cellulose resin, polycarbonate, polyvinylpyrrolidone, polyvinyl alcohol, gelatin and the like. Examples of the olefin component include ethylene and propylene.
- a colorant can be exemplified.
- the components of the colorant include dyes, organic coloring pigments, fluorescent pigments, titanium oxide, zinc oxide, carbon black, iron oxide, iron yellow, ultramarine blue, hologram powder, aluminum powder, metallic pigments, and pearl pigments.
- the transfer layer 10 including the molten ink layer 9 can impart various design characteristics to the transferred body to which the transfer layer is transferred.
- the transfer layer 10 including the molten ink layer 9 can form an image on the transferred body according to the hue of the colorant contained in the molten ink layer 9.
- the molten ink layer 9 containing a metallic pigment, a pearl pigment, or the like functions as a glossy layer.
- the transfer layer including the molten ink layer 9 in this form has a glossy feeling.
- the molten ink layer 9 containing titanium oxide, carbon black, or the like functions as a base layer or a concealing layer.
- the molten ink layer 9 may contain two or more kinds of colorants.
- the molten ink layer 9 contains both a colorant capable of exhibiting the function of the glossy layer and a colorant capable of exhibiting the function of the base layer and the concealing layer.
- the molten ink layer 9 may contain a binder resin, wax and the like.
- any one or two or more layers constituting the transfer layer 10 contain a colorant.
- the transfer layer 10 as an example includes a protective layer 5 containing a colorant.
- the transfer layer 10 as an example includes an adhesive layer 6 containing a colorant.
- the transfer layer 10 as an example includes a heat seal layer 8 containing a colorant.
- the layer in contact with the release layer 2 contains a resin having an acid value of 20 mgKOH / g or less.
- the layer in contact with the release layer 2 contains a resin having an acid value of 15 mgKOH / g or less.
- the layer in contact with the release layer 2 means a layer that is in direct contact with the release layer 2 among the layers constituting the transfer layer. The transfer layer 10 in this form can improve the transferability of the transfer layer 10.
- the layer in contact with the release layer 2 contains a resin having an acid value of 3 mgKOH / g or more and 15 mgKOH / g or less.
- the layer in contact with the release layer 2 contains a resin having an acid value of 6 mgKOH / g or more and 15 mgKOH / g or less.
- the transfer layer 10 in this form can improve the transferability of the transfer layer 10, and can further improve the foil breakability of the transfer layer 10 and the foil retention of the transfer layer 10.
- the layer in contact with the release layer 2 is the protective layer 5.
- the layer in contact with the release layer 2 is the heat seal layer 8.
- the layer in contact with the release layer 2 is the receiving layer 7.
- the layer in contact with the release layer 2 is the molten ink layer 9.
- the acid value means the number of milligrams of potassium hydroxide required to neutralize an acid component (for example, a carboxyl group) contained in 1 g of a polymer.
- the acid value can be measured by a method according to JIS-K-2501 (2003).
- Acrylic resin, vinyl chloride-vinyl acetate copolymer, and polyester are preferable as the resin having an acid value of 20 mgKOH / g or less.
- the content of the resin having an acid value of 20 mgKOH / g or less is preferably 50% by mass or more, more preferably 70% by mass or more, based on the total mass of the layer in contact with the release layer 2.
- the thickness of the layer containing the resin having an acid value of 20 mgKOH / g or less is preferably 0.1 ⁇ m or more and 10 ⁇ m or less.
- the release layer 2 contains polyvinyl alcohol, or the layer in contact with the release layer 2 contains a resin having an acid value of 20 mgKOH / g or less.
- the release layer 2 contains polyvinyl alcohol, and the layer in contact with the release layer 2 contains a resin having an acid value of 20 mgKOH / g or less. ..
- a back layer (not shown) may be provided on the surface of the base material 1 opposite to the surface on which the release layer 2 is provided.
- the thickness of the back layer is preferably 0.1 ⁇ m or more and 5 ⁇ m or less, and more preferably 0.3 ⁇ m or more and 2 ⁇ m or less.
- Examples of the transfer material to which the transfer layer 10 of the heat transfer sheet 100 of the present disclosure is transferred include a paper base material, a resin base material, wood, a glass base material, a metal base material, and a ceramic base material. Further, when the heat transfer sheets of various forms of the present disclosure are used in combination, any one of the heat transfer sheets 100 may be used as the transferred body.
- the resin base material a form such as a film or a card can be exemplified.
- the transferred body may have a curvature, an uneven structure, or the like in whole or in part.
- the transferred body may be one on which a predetermined image is formed.
- Examples of the paper base material include plain paper, woodfree paper, and tracing paper.
- the resin base material examples include polycarbonate, acrylic resin, acrylonitrile-butadiene-styrene (ABS) resin, polyvinyl chloride, and the like.
- ABS acrylonitrile-butadiene-styrene
- the metal base material aluminum or the like can be exemplified.
- the ceramic base material include pottery and the like.
- the method for producing a printed matter of the present disclosure includes an image forming step, a first transfer step, and a second transfer step.
- the method for producing a printed matter of the present disclosure uses an intermediate transfer medium, a heat-sealed panel, and a transferred body.
- the image forming step is a step of forming an image on the receiving layer of the intermediate transfer medium by using an intermediate transfer medium and a thermal transfer sheet having a dye layer.
- the first transfer step is a step of transferring a transfer layer including a heat seal layer onto an intermediate transfer medium after image formation using a heat seal panel.
- the second transfer step is a step of transferring the transfer layer of the intermediate transfer medium to the transfer target after the first transfer step.
- the produced printed matter has a laminated structure in which a transfer material, a transfer layer including a heat seal layer, and a transfer layer including a receiving layer on which an image is formed are laminated in this order.
- the thermal transfer sheet 100 of the present disclosure (see FIG. 2) including a transfer layer having a single-layer structure or a laminated structure including a receiving layer 7 is used as an intermediate transfer medium.
- the heat transfer sheet 100 of the present disclosure including the transfer layer 10 having a single layer structure or a laminated structure including the heat seal layer 8 is used as the heat seal panel (see FIG. 3).
- various configurations described in the thermal transfer sheet 100 of the present disclosure can be appropriately selected and used.
- the combination of the heat transfer sheets of the present disclosure is a transfer layer having a single layer structure or a laminated structure including a heat seal layer 8 and a heat transfer sheet 100 of the present disclosure including a transfer layer having a single layer structure or a laminated structure including a receiving layer 7.
- 10 is a combination of the heat transfer sheets 100 of the present disclosure including 10.
- various configurations described in the thermal transfer sheet 100 of the present disclosure can be appropriately selected and used.
- the thermal transfer sheet according to the embodiment of the present disclosure is a thermal transfer sheet in which a base material, a release layer, and a transfer layer are laminated in this order, and the distance between the release layer and the transfer layer is the transfer layer. It is a transfer interface, and the release layer contains an acid-modified polyolefin and satisfies one or more of the following (i) to (vivii).
- the thermal transfer sheet according to the embodiment of the present disclosure satisfies a plurality of the following (i) to (vivii), any of the following (i) to (vivii) may be combined.
- the melting point of the acid-modified polyolefin is 75 ° C. or higher.
- the weight average molecular weight (Mw) of the acid-modified polyolefin is 50,000 or more.
- the amount of acid modification of the acid-modified polyolefin is 1.4% by mass or more and 5% by mass or less.
- the transfer layer has a single-layer structure or a laminated structure, and the layer in contact with the release layer among the layers constituting the transfer layer contains a resin having an acid value of 20 mgKOH / g or less. ..
- the resin having an acid value of 20 mgKOH / g or less is any one of an acrylic resin, a vinyl chloride-vinyl acetate copolymer, and a polyester.
- the base material is in contact with the release layer, and the base material contains polyester.
- the transfer layer has a laminated structure in which a protective layer and a receiving layer are laminated in this order from the release layer side.
- the heat seal layer is located at the transfer interface of the transfer layer.
- the present disclosure will be described in more detail with reference to Examples and Comparative Examples.
- parts or% are based on mass.
- the blending amount (part) is a charged amount, which is a value before conversion into a solid content.
- Table 1 shows the details of the acid-modified polyolefins (1) to (5) contained in each release layer coating liquid.
- Example 1 A polyethylene terephthalate film having a thickness of 5 ⁇ m was used as a base material.
- a release layer coating liquid 1 having the following composition was applied and dried on this base material to form a release layer having a thickness of 0.2 ⁇ m.
- a protective layer coating liquid 1 having the following composition was applied and dried on the release layer to form a protective layer having a thickness of 1 ⁇ m, and the release layer and the protective layer were provided on the base material in this order.
- the thermal transfer sheet of Example 1 was obtained.
- the protective layer constitutes the transfer layer in the present disclosure.
- Example 2 All were carried out in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid 2 having the following composition to form a release layer having a thickness of 0.2 ⁇ m.
- the thermal transfer sheet of Example 2 was obtained.
- Example 3 All were carried out in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid 3 having the following composition to form a release layer having a thickness of 0.2 ⁇ m.
- the thermal transfer sheet of Example 3 was obtained.
- Example 4 The thermal transfer sheet of Example 4 was applied in the same manner as in Example 1 except that the protective layer coating liquid 1 was changed to the protective layer coating liquid 2 having the following composition to form a protective layer having a thickness of 1 ⁇ m. Obtained.
- Example 5 The thermal transfer sheet of Example 5 was applied in the same manner as in Example 1 except that the protective layer coating liquid 1 was changed to the protective layer coating liquid 3 having the following composition to form a protective layer having a thickness of 1 ⁇ m. Obtained.
- ⁇ Coating liquid for protective layer 3 20 parts of vinyl chloride-vinyl acetate copolymer (acid value 5.9 mgKOH / g) (Solvine (registered trademark) M5 Nissin Chemical Industry Co., Ltd.) ⁇ 40 parts of methyl ethyl ketone ⁇ 40 parts of toluene
- Example 6 The coating liquid 1 for the protective layer was changed to the coating liquid 4 for the protective layer having the following composition, and the coating liquid 4 for the protective layer was applied and dried on the release layer to form a coating film.
- the thermal transfer sheet of Example 6 was obtained in the same manner as in Example 1 except that the coating film was irradiated with an electron beam having an acceleration voltage of 165 kV and an irradiation dose of 5 MRad to form a protective layer having a thickness of 4 ⁇ m. It was.
- Example 7 The coating liquid 1 for the protective layer was changed to the coating liquid 5 for the protective layer having the following composition, and the coating liquid 5 for the protective layer was applied and dried on the release layer to form a coating film. Next, the coating film was irradiated with ultraviolet rays having an exposure amount of 220 mJ / cm 2 using a UV exposure machine (Fusion UV, F600V, LH10 lamp, H bulb, and reflector is a cold type) to form a protective layer having a thickness of 1 ⁇ m. A thermal transfer sheet of Example 7 was obtained in the same manner as in Example 1 except that it was formed.
- a UV exposure machine Fusion UV, F600V, LH10 lamp, H bulb, and reflector is a cold type
- ⁇ Coating liquid 5 for protective layer > ⁇ 20 parts of polyfunctional acrylate (NK ester A-9300 Shin Nakamura Chemical Industry Co., Ltd.) ⁇ 20 parts of urethane acrylate (NK oligomer EA1020 Shin Nakamura Chemical Industry Co., Ltd.) ⁇ 10 parts of urethane acrylate (NK ester U-15HA Shin Nakamura Chemical Industry Co., Ltd.) ⁇ Reactive binder (containing unsaturated group) 5 parts (NK Polymer C24T Shin Nakamura Chemical Industry Co., Ltd.) ⁇ Filler (volume average particle diameter 12 nm) 40 parts (MEK-AC2140Z Nissan Chemical Industries, Ltd.) -Surfactant (acrylic surfactant) 0.1 part (LF-1984 Kusumoto Chemical Co., Ltd.) ⁇ 200 parts of toluene ⁇ 200 parts of methyl ethyl ketone
- Example 8 The release layer coating liquid 1 is changed to the release layer coating liquid 4 having the following composition to form a release layer having a thickness of 0.2 ⁇ m, and the protective layer coating liquid 1 is protected by the above composition.
- the thermal transfer sheet of Example 8 was obtained in the same manner as in Example 1 except that the protective layer having a thickness of 1 ⁇ m was formed by changing to the layer coating liquid 2.
- Example 9 All were carried out in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid 5 having the following composition to form a release layer having a thickness of 0.2 ⁇ m.
- the thermal transfer sheet of Example 9 was obtained.
- Example 10 The release layer coating liquid 1 is changed to the release layer coating liquid 5 having the above composition to form a release layer having a thickness of 0.2 ⁇ m, and the protective layer coating liquid 1 has the above composition.
- the thermal transfer sheet of Example 10 was obtained in the same manner as in Example 1 except that the coating liquid 2 for the protective layer was changed to form a protective layer having a thickness of 1 ⁇ m.
- Example 11 The release layer coating liquid 1 is changed to the release layer coating liquid 4 having the above composition to form a release layer having a thickness of 0.2 ⁇ m, and the protective layer coating liquid 1 is protected with the following composition.
- the thermal transfer sheet of Example 11 was obtained in the same manner as in Example 1 except that the protective layer having a thickness of 1 ⁇ m was formed by changing to the layer coating liquid 6.
- Example 12 The release layer coating liquid 1 is changed to the release layer coating liquid 6 having the following composition to form a release layer having a thickness of 0.2 ⁇ m, and the protective layer coating liquid 1 has the above composition.
- a thermal transfer sheet of Example 12 was obtained in the same manner as in Example 1 except that the coating liquid 2 for the protective layer was changed to form a protective layer having a thickness of 1 ⁇ m.
- Example 13 All were carried out in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid 4 having the above composition to form a release layer having a thickness of 0.2 ⁇ m.
- the thermal transfer sheet of Example 13 was obtained.
- Example 14 The thermal transfer sheet of Example 14 was applied in the same manner as in Example 1 except that the protective layer coating liquid 1 was changed to the protective layer coating liquid 6 having the above composition to form a protective layer having a thickness of 1 ⁇ m. Obtained.
- Example 15 The release layer coating liquid 1 is changed to the release layer coating liquid 5 having the above composition to form a release layer having a thickness of 0.2 ⁇ m, and the protective layer coating liquid 1 is used as the protective layer having the above composition.
- a thermal transfer sheet of Example 15 was obtained in the same manner as in Example 1 except that a protective layer having a thickness of 1 ⁇ m was formed by changing to the coating liquid 6.
- Example 16 The thermal transfer sheet of Example 16 was applied in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid 7 having the following composition to form the release layer. Obtained.
- Example 17 All were carried out in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid 8 having the following composition to form a release layer having a thickness of 0.2 ⁇ m.
- the thermal transfer sheet of Example 17 was obtained.
- Example 18 The release layer coating liquid 1 is changed to the release layer coating liquid 4 having the above composition to form a release layer having a thickness of 0.2 ⁇ m, and the protective layer coating liquid 1 is protected with the following composition.
- the thermal transfer sheet of Example 18 was obtained in the same manner as in Example 1 except that the protective layer having a thickness of 1 ⁇ m was formed by changing to the layer coating liquid 7.
- ⁇ Coating liquid 7 for protective layer 20 parts of polyester (acid value 1 mgKOH / g) (Elitel (registered trademark) 3380 Unitika Ltd.) ⁇ 40 parts of methyl ethyl ketone ⁇ 40 parts of toluene
- Example 1 All comparisons were made in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid A having the following composition to form a release layer having a thickness of 0.2 ⁇ m.
- the thermal transfer sheet of Example 1 was obtained.
- Example 2 (Comparative Example 2) All comparisons were made in the same manner as in Example 1 except that the release layer coating liquid 1 was changed to the release layer coating liquid B having the following composition to form a release layer having a thickness of 0.2 ⁇ m. The thermal transfer sheet of Example 2 was obtained.
- Comparative Example 3 A thermal transfer sheet of Comparative Example 3 was obtained in the same manner as in Example 1 except that a release layer was not formed.
- Transfer conditions 1 160 ° C, 20 mm / sec.
- Transfer condition 2 140 ° C., 20 mm / sec.
- Transfer condition 3 120 ° C., 20 mm / sec.
- Transfer condition 4 100 ° C., 20 mm / sec.
- Transferability evaluation The state of transfer when the transfer layer was transferred under the above transfer conditions was confirmed, and the transferability was evaluated based on the following evaluation criteria. The evaluation results are shown in Table 2. Fusion in the following evaluation criteria means fusion of the release layer and the transfer layer.
- A No tailing occurs.
- B The length of the tail pull is 0.2 mm or less.
- C The length of the tail pull is longer than 0.2 mm and less than 1 mm.
- NG The length of the tail pull is 1 mm or more.
- Adhesion evaluation A tape (Scotch (registered trademark) tape (BK-24) 3M Ltd.) was attached on the transfer layer of the thermal transfer sheet of each example and the comparative example, and the state when the tape was peeled off at a peeling angle of 90 ° was shown. After confirmation, adhesion evaluation was performed based on the following evaluation criteria. The evaluation results are also shown in Table 2.
- A The release layer does not peel off from the base material.
- B A part of the release layer is peeled off from the base material.
- C All of the release layer is peeled off from the base material.
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Abstract
Description
以下、本開示の実施の形態に係る熱転写シート(以下、本開示の熱転写シートと言う)について説明する。
本開示の熱転写シート100を構成する基材1は、基材1上に設けられる離型層2や、離型層2上に設けられる転写層10を保持する。
基材としては、各種のフィルム、各種のシート、及び各種のカード等を例示できる。
基材1の材料に限定はなく、ポリエチレンテレフタレート等のポリエステル、ポリアリレート、ポリカーボネート、ポリウレタン、ポリイミド、ポリエーテルイミド、セルロース誘導体、ポリエチレン、エチレン-酢酸ビニル共重合体、ポリプロピレン、ポリスチレン、アクリル、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリビニルアルコール、ポリビニルブチラール、ナイロン、ポリエーテルエーテルケトン、ポリサルフォン、ポリエーテルサルフォン、テトラフルオロエチレン-パーフルオロアルキルビニルエーテル共重合体、ポリビニルフルオライド、テトラフルオロエチレン-エチレン共重合体、テトラフルオロエチレン-ヘキサフルオロプロピレン共重合体、ポリクロロトリフルオロエチレン、及びポリビニリデンフルオライド等を例示できる。
ボイド層としては、内部にボイドを有する基材等を例示できる。ボイド層は、ポリマー中に無機粒子を混練し、その混合物を延伸するときに無機粒子を核としてボイドを生じさせて製造したもの、主体とする樹脂に対して非相溶なポリマーを混合し、その混合物を延伸するときにボイドを生じさせたもの等を例示できる。ポリマーは、1種でも複数でもよい。ボイド層が有するボイドは、ミクロボイドや、空孔と称される場合もある。
各図に示すように、基材1上には、離型層2が設けられている。基材1と離型層2は接してもよく、基材1と離型層2は接しなくてもよい。各図に示す形態では、基材1と離型層2が直接的に接している。本開示の一例としての熱転写シートは、基材1と離型層2の間に、1つ、又は複数の層が位置している。離型層2上には、転写層10が設けられている。本開示の熱転写シートは、離型層2と転写層10が直接的に接している。
離型層2は、本開示の熱転写シート100の転写層10を転写したときに、基材1側に残る層である。
本開示において、尾引きとは、転写層を被転写体上に転写するときに、転写層の転写領域と非転写領域の境界を起点とし、該境界から非転写領域側にはみ出すように転写層が転写されてしまう現象を意味する。
本開示において、箔持ち性とは、熱転写シートに曲げ応力を加えたときの転写層の脱落の抑制度合を意味する。箔持ち性が良好であるという場合には、熱転写シートに曲げ応力を加えたときに転写層の脱落を抑制できることを意味する。
一例としての離型層2は、融点が100℃以上140℃以下で、重量平均分子量(Mw)が50000以上120000以下の酸変性ポリオレフィンを含有している。
一例としての離型層2は、融点が90℃以上160℃以下で、重量平均分子量(Mw)が65000以上85000以下の酸変性ポリオレフィンを含有している。
一例としての離型層2は、融点が100℃以上140℃以下で、重量平均分子量(Mw)が65000以上85000以下の酸変性ポリオレフィンを含有している。
これらの形態の離型層2は、転写層の転写性をより良好にできる。
他の一例としての離型層2は、融点が75℃以上90℃未満で、重量平均分子量(Mw)が85000より大きく120000以下の酸変性ポリオレフィンを含有している。
この形態の離型層2は、転写層の箔持ち性、及び転写層の箔切れ性をより良好にできる。
変性態様に限定はなく、グラフト変性等を例示できる。
カルボン酸、又はその無水物としては、マレイン酸、無水マレイン酸、アクリル酸、メタクリル酸、イタコン酸、無水イタコン酸、フマル酸、及びクロトン酸等を例示できる。
炭素数が2以上4以下のアルケンとしては、エチレン、プロピレン、1-ブテン、2-ブテン、1-ペンテン、及び1-ヘキセン等を例示できる。これらのポリオレフィン成分の中でも、プロピレンが好ましい。ポリオレフィン成分は、環状ポリオレフィンでもよい。
架橋剤としては、オキサゾリン化合物、カルボジイミド化合物、イソシアネート化合物、及びエポキシ化合物等を例示できる。
離型層2が架橋剤を含有する場合、架橋剤の含有量は、酸変性ポリオレフィンの質量を100質量%としたときに、0.8質量%以下が好ましく、0.5質量%以下がより好ましい。この形態の離型層2は、当該離型層2が含有する架橋剤と、転写層10が含有する成分との意図しない架橋反応を抑制できる。
また、この形態の離型層2は、基材1と離型層2との間に接着性を有する層を設けることなく、基材1と離型層2との密着性を良好にできる。つまり、熱転写シートの構成の簡略化を実現できる。接着性を有する層としては、プライマー層、及びアンカー層等を例示できる。
好ましい酸変性量の酸変性ポリオレフィンを含有する離型層2は、基材1としてポリエステルを主体とする基材を使用する場合に好適であり、基材1としてポリエチレンテレフタレートを主体とする基材を使用する場合に特に好適である。なお、ポリエステルを主体とする基材1は、基材1と離型層2が接する形態としたときに、従来の離型層では密着性を十分に確保することが困難な基材である。本開示において、主体とは、基材の総質量に対する質量が50質量%より多いことを意味する。
離型層2の総質量に対するポリビニルアルコールの含有量は、1質量%以上50質量%以下が好ましく、10質量%以上30質量%以下がより好ましい。この形態の離型層2は、転写層10の箔持ち性、及び転写層10の箔切れ性をより良好にできる。また、この形態の離型層2上に、後述する好ましい形態の転写層10を設けることで、転写層10の転写性、転写層10の箔持ち性、及び転写層10の箔切れ性の全てをさらに良好にできる。
塗布方法としては、グラビア印刷法、スクリーン印刷法、及びグラビア版を用いたリバースコーティング法等を例示できる。また、これ以外の塗布方法を用いることもできる。このことは、後述する各種の層の形成方法も同様である。
各図に示すように、離型層2上には、転写層10が設けられている。転写層10は、離型層2から剥離できる。本開示の熱転写シート100において、離型層2と転写層10の間が転写層10の転写界面である。転写界面は剥離界面と称される場合もある。本開示の熱転写シート100は、転写界面で転写層10を転写できる。図1A、図3、図4に示すように、転写層10は、単層構造でもよい。図1B、図2に示すように、転写層10は、複数の層が積層された積層構造でもよい。
本開示の一例としての熱転写シート100は、転写層10が、受容層7のみからなる単層構造である。
この形態の熱転写シートは、中間転写媒体として機能する。この形態の熱転写シート100は、転写層10の表面に位置する受容層7に熱転写画像を形成し、次いで、被転写体上に、転写層10を転写することで、印画物を製造できる。
この形態の熱転写シートは、ヒートシールパネルとして機能する。この形態の転写層が転写される被転写体としては、受容層に画像が形成された中間転写媒体、及び保護層転写シート等を例示できる。
例えば、図1A、図2、図4に示す形態の熱転写シート100と、図3に示す形態の熱転写シート100を組合せ、図1A、図2、図4に示す形態の熱転写シート100の転写層10に、図3に示す形態の熱転写シートの転写層10を転写することで、図1A、図2、図4に示す形態の熱転写シート100の転写層10に接着性を付与できる。
転写層10が、ヒートシール層8を含む積層構造である場合、ヒートシール層8は、転写層10を構成する層のうち、離型層2から最も近くに位置する。
オレフィン成分としては、エチレン、及びプロピレン等を例示できる。
着色剤の成分としては、染料、有機着色顔料、蛍光顔料、酸化チタン、酸化亜鉛、カーボンブラック、酸化鉄、鉄黄、群青、ホログラム粉末、アルミニウム粉末、メタリック顔料、及びパール顔料等を例示できる。
溶融インキ層9を含む転写層10は、当該転写層が転写された被転写体に、各種の意匠性を付与できる。
溶融インキ層9を含む転写層10は、被転写体に、溶融インキ層9が含有している着色剤の色相に応じた画像を形成できる。
メタリック顔料や、パール顔料等を含有する溶融インキ層9は、光沢層として機能する。この形態の溶融インキ層9を含む転写層は光沢感を有する。
酸化チタンや、カーボンブラック等を含有する溶融インキ層9は、下地層や、隠蔽層として機能する。
溶融インキ層9は、2種以上の着色剤を含有してもよい。
一例としての溶融インキ層9は、光沢層の機能を発現できる着色剤と、下地層や、隠蔽層の機能を発現できる着色剤の双方を含有している。
溶融インキ層9は、バインダー樹脂、及びワックス等を含有してもよい。
一例としての転写層10は、着色剤を含有する保護層5を含む。
一例としての転写層10は、着色剤を含有する接着層6を含む。
一例としての転写層10は、着色剤を含有するヒートシール層8を含む。
一例としての転写層10は、離型層2と接する層がヒートシール層8である。
一例としての転写層10は、離型層2と接する層が受容層7である。
一例としての転写層10は、離型層2と接する層が溶融インキ層9である。
本開示の好ましい形態の熱転写シート100は、離型層2が、ポリビニルアルコールを含有しており、且つ、離型層2と接する層が、酸価が20mgKOH/g以下の樹脂を含有している。
また、基材1の離型層2が設けられた面とは反対側の面に、背面層(図示しない)を設けてもよい。背面層の厚みは、0.1μm以上5μm以下が好ましく、0.3μm以上2μm以下がより好ましい。
本開示の熱転写シート100の転写層10が転写される被転写体としては、紙基材、樹脂基材、木材、ガラス基材、金属基材、及びセラミック基材等を例示できる。また、本開示の各種形態の熱転写シートを組合せて使用する場合、何れか1つの熱転写シート100を被転写体としてもよい。
樹脂基材としては、フィルム、カード等の形態を例示できる。被転写体は、その全体、又は一部が、曲率や、凹凸構造等を有してもよい。被転写体は、所定の画像が形成されたものでもよい。
紙基材としては、普通紙、上質紙、及びトレーシングペーパー等を例示できる。
樹脂基材としては、ポリカーボネート、アクリル樹脂、アクリロニトリル・ブタジエン・スチレン(ABS)樹脂、及びポリ塩化ビニル等を例示できる。
金属基材としては、アルミ等を例示できる。
セラミック基材としては、陶器等を例示できる。
本開示の印画物の製造方法は、画像形成工程、第1転写工程、第2転写工程を含む。
本開示の印画物の製造方法は、中間転写媒体、ヒートシールパネル、及び被転写体を使用する。
画像形成工程は、中間転写媒体と、染料層を有する熱転写シートを使用し、中間転写媒体の受容層に画像を形成する工程である。
第1転写工程は、ヒートシールパネルを使用し、画像形成後の中間転写媒体上に、ヒートシール層を含む転写層を転写する工程である。
第2転写工程は、第1転写工程後、被転写体に、中間転写媒体の転写層を転写する工程である。本工程を経ることで、印画物を製造できる。
製造された印画物は、被転写体、ヒートシール層を含む転写層、画像が形成された受容層を含む転写層がこの順番で積層された積層構造である。
本開示の印画物の製造方法では、中間転写媒体として、受容層7を含む単層構造、又は積層構造の転写層を含む本開示の熱転写シート100(図2参照)を使用する。
本開示の印画物の製造方法では、ヒートシールパネルとして、ヒートシール層8を含む単層構造、又は積層構造の転写層10を含む本開示の熱転写シート100を使用する(図3参照)。
中間転写媒体として機能する熱転写シート100、及びヒートシールパネルとして機能する熱転写シート100は、上記本開示の熱転写シート100で説明した各種の構成を適宜選択して使用できる。
本開示の熱転写シートの組合せは、受容層7を含む単層構造、又は積層構造の転写層を含む本開示の熱転写シート100と、ヒートシール層8を含む単層構造、又は積層構造の転写層10を含む本開示の熱転写シート100の組合せである。この組合せを構成する熱転写シート100は、上記本開示の熱転写シート100で説明した各種の構成を適宜選択して使用できる。
(i)前記酸変性ポリオレフィンの融点が、75℃以上である。
(ii)前記酸変性ポリオレフィンの重量平均分子量(Mw)が、50000以上である。
(iii)前記酸変性ポリオレフィンの酸変性量が、1.4質量%以上5質量%以下である。
(iv)前記転写層が、単層構造、又は積層構造であり、前記転写層を構成する層のうち前記離型層と接する層が、酸価が20mgKOH/g以下の樹脂を含有している。
(v)前記酸価が20mgKOH/g以下の樹脂が、アクリル樹脂、塩化ビニル-酢酸ビニル共重合体、及びポリエステルの何れかである。
(vi)前記基材と前記離型層とが接しており、前記基材が、ポリエステルを含有している。
(vii)前記転写層が、離型層側から、保護層、受容層がこの順で積層された積層構造である。
(viii)前記転写層がヒートシール層を含む単層構造、又は積層構造であり、前記転写層が積層構造である場合、前記ヒートシール層は前記転写層の転写界面に位置する。
基材として、厚さ5μmのポリエチレンテレフタレートフィルムを使用した。この基材上に、下記組成の離型層用塗工液1を、塗布・乾燥して厚みが0.2μmの離型層を形成した。離型層上に、下記組成の保護層用塗工液1を塗布・乾燥して厚みが1μmの保護層を形成し、基材上に、離型層、保護層がこの順で設けられた実施例1の熱転写シートを得た。保護層は、本開示における転写層を構成する。
・酸変性ポリオレフィン(1) 16部
・水 42部
・イソプロピルアルコール 42部
・アクリル樹脂(酸価0mgKOH/g) 20部
(ダイヤナール(登録商標)BR-83 三菱ケミカル(株))
・メチルエチルケトン 40部
・トルエン 40部
離型層用塗工液1を、下記組成の離型層用塗工液2に変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、実施例2の熱転写シートを得た。
・酸変性ポリオレフィン(2) 16部
・水 42部
・イソプロピルアルコール 42部
離型層用塗工液1を、下記組成の離型層用塗工液3に変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、実施例3の熱転写シートを得た。
・酸変性ポリオレフィン(3) 16部
・水 42部
・イソプロピルアルコール 42部
保護層用塗工液1を下記組成の保護層用塗工液2に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例4の熱転写シートを得た。
・アクリル樹脂(酸価9.8mgKOH/g) 20部
(ダイヤナール(登録商標)BR-87 三菱ケミカル(株))
・メチルエチルケトン 40部
・トルエン 40部
保護層用塗工液1を下記組成の保護層用塗工液3に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例5の熱転写シートを得た。
・塩化ビニル-酢酸ビニル共重合体(酸価5.9mgKOH/g)20部
(ソルバイン(登録商標)M5 日信化学工業(株))
・メチルエチルケトン 40部
・トルエン 40部
保護層用塗工液1を下記組成の保護層用塗工液4に変更し、離型層上に保護層用塗工液4を塗布・乾燥して塗膜を形成した。次いで、この塗膜に、加速電圧165kV、照射線量5MRadの電子線を照射して厚みが4μmの保護層を形成した以外は、全て実施例1と同様にして、実施例6の熱転写シートを得た。
・4官能のポリカーボネートアクリレート(Mw:10000) 95部
・アクリルポリマー(メタクリル酸メチルとメタクリル酸との共重合体、Tg:105℃、Mw:約20000) 2.5部
・添加剤 2.5部
保護層用塗工液1を下記組成の保護層用塗工液5に変更し、離型層上に保護層用塗工液5を塗布・乾燥して塗膜を形成した。次いで、この塗膜に、UV露光機(Fusion UV、F600V、LH10ランプ、Hバルブ、反射鏡はコールドタイプ)を用い、露光量220mJ/cm2の紫外線を照射して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例7の熱転写シートを得た。
・多官能アクリレート 20部
(NKエステルA-9300 新中村化学工業(株))
・ウレタンアクリレート 20部
(NKオリゴマーEA1020 新中村化学工業(株))
・ウレタンアクリレート 10部
(NKエステルU-15HA 新中村化学工業(株))
・反応性バインダー(不飽和基含有) 5部
(NKポリマーC24T 新中村化学工業(株))
・フィラー(体積平均粒子径12nm) 40部
(MEK-AC2140Z 日産化学(株))
・界面活性剤(アクリル系界面活性剤) 0.1部
(LF-1984 楠本化学(株))
・トルエン 200部
・メチルエチルケトン 200部
離型層用塗工液1を、下記組成の離型層用塗工液4に変更して厚みが0.2μmの離型層を形成し、保護層用塗工液1を上記組成の保護層用塗工液2に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例8の熱転写シートを得た。
・酸変性ポリオレフィン(1) 13部
・ポリビニルアルコール 1部
(ゴーセノール(登録商標)KH-20 日本合成化学工業(株))
・水 43部
・イソプロピルアルコール 43部
離型層用塗工液1を、下記組成の離型層用塗工液5に変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、実施例9の熱転写シートを得た。
・酸変性ポリオレフィン(1) 16.6部
・架橋剤(固形分40%) 0.06部
(エポクロス(登録商標)WS-500 日本触媒(株))
・水 42部
・イソプロピルアルコール 42部
離型層用塗工液1を、上記組成の離型層用塗工液5に変更して厚みが0.2μmの離型層を形成し、保護層用塗工液1を、上記組成の保護層用塗工液2に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例10の熱転写シートを得た。
離型層用塗工液1を、上記組成の離型層用塗工液4に変更して厚みが0.2μmの離型層を形成し、保護層用塗工液1を下記組成の保護層用塗工液6に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例11の熱転写シートを得た。
・アクリル樹脂(酸価18mgKOH/g) 20部
(ダイヤナール(登録商標)BR-77 三菱ケミカル(株))
・メチルエチルケトン 40部
・トルエン 40部
離型層用塗工液1を、下記組成の離型層用塗工液6に変更して厚みが0.2μmの離型層を形成し、保護層用塗工液1を、上記組成の保護層用塗工液2に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例12の熱転写シートを得た。
・酸変性ポリオレフィン(1) 8部
・ポリビニルアルコール 2部
(ゴーセノール(登録商標)KH-20 日本合成化学工業(株))
・水 45部
・イソプロピルアルコール 45部
離型層用塗工液1を、上記組成の離型層用塗工液4に変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、実施例13の熱転写シートを得た。
保護層用塗工液1を上記組成の保護層用塗工液6に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例14の熱転写シートを得た。
離型層用塗工液1を上記組成の離型層用塗工液5に変更して厚みが0.2μmの離型層を形成し、保護層用塗工液1を上記組成の保護層用塗工液6に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例15の熱転写シートを得た。
離型層用塗工液1を、下記組成の離型層用塗工液7に変更して離型層を形成した以外は、全て実施例1と同様にして、実施例16の熱転写シートを得た。
・酸変性ポリオレフィン(4) 17部
・水 36部
・イソプロピルアルコール 47部
離型層用塗工液1を、下記組成の離型層用塗工液8に変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、実施例17の熱転写シートを得た。
・酸変性ポリオレフィン(5) 17部
・水 36部
・イソプロピルアルコール 47部
離型層用塗工液1を、上記組成の離型層用塗工液4に変更して厚みが0.2μmの離型層を形成し、保護層用塗工液1を下記組成の保護層用塗工液7に変更して厚みが1μmの保護層を形成した以外は、全て実施例1と同様にして、実施例18の熱転写シートを得た。
・ポリエステル(酸価1mgKOH/g) 20部
(エリーテル(登録商標)3380 ユニチカ(株))
・メチルエチルケトン 40部
・トルエン 40部
離型層用塗工液1を、下記組成の離型層用塗工液Aに変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、比較例1の熱転写シートを得た。
・シリコーン変性樹脂(固形分30%) 16部
(KS-847 信越化学工業(株))
・メチルエチルケトン 42部
・トルエン 42部
離型層用塗工液1を、下記組成の離型層用塗工液Bに変更して厚みが0.2μmの離型層を形成した以外は、全て実施例1と同様にして、比較例2の熱転写シートを得た。
・ポリウレタン(固形分22.5%) 18部
(ハイドラン(登録商標)AP-40(F) DIC(株))
・ポリビニルアルコール 1部
(ゴーセノール(登録商標)KH-20 日本合成化学工業(株))
・水 40.5部
・イソプロピルアルコール 40.5部
離型層を形成しない以外は、全て実施例1と同様にして比較例3の熱転写シートを得た。
カード用ラミネータ(フジプラ(株))を用い、塩化ビニル製のカード基材(大日本印刷(株))上に、各実施例、及び比較例の熱転写シートの転写層を転写し、各実施例、及び比較例の転写物を得た。転写層の転写は下記の4つの条件(下記転写条件1、2、3、4)で、それぞれ行った。
転写条件1:160℃、20mm/sec.
転写条件2:140℃、20mm/sec.
転写条件3:120℃、20mm/sec.
転写条件4:100℃、20mm/sec.
上記転写条件で転写層の転写を行ったときの、転写の状態を確認し、下記評価基準に基づいて転写性評価を行った。評価結果を表2に示す。下記評価基準における融着は、離型層と転写層の融着を意味する。
A・・・転写条件1~4の全てで融着なく転写できた。
B・・・転写条件1では融着するが、転写条件2~4では離型層と転写層が融着なく転写できた。
C・・・転写条件1、2では融着するが、転写条件3、4では融着なく転写できた。
D・・・転写条件1~3では融着するが、転写条件4では融着なく転写できた。
各実施例、及び比較例の熱転写シートを折り曲げたときの、転写層の箔落ちの有無を目視で確認し、下記評価基準に基づいて転写層の箔持ち評価を行った。評価結果を表2に示す。
A・・・転写層の箔落ちが全くない。
B・・・転写層の箔落ちが僅かにみられるが使用上問題ないレベルである。
C・・・部分的に転写層の箔落ちがみられるが使用上問題ないレベルである。
NG・・・大部分で転写層の箔落ちがみられ使用上問題が懸念されるレベルである。
上記転写層の転写で得られた各実施例、及び比較例の転写物の端部の尾引きの状態を確認し、以下の評価基準に基づいて箔切れ性の評価を行った。箔切れ性評価は、転写条件4で得られた各実施例、及び比較例の転写物を使用した。評価結果を表2に示す。
A・・・尾引きの発生なし。
B・・・尾引きの長さが0.2mm以下。
C・・・尾引きの長さが0.2mmより長く1mm未満。
NG・・・尾引きの長さが1mm以上。
各実施例、及び比較例の熱転写シートの転写層上に、テープ(Scotch(登録商標) tape(BK-24) スリーエム社)を貼り付け、90°の剥離角度でテープを剥がしたときの状態を確認し、以下の評価基準に基づいて密着性評価を行った。評価結果を表2に併せて示す。
A・・・基材から離型層が剥がれない。
B・・・基材から離型層の一部が剥がれる。
C・・・基材から離型層の全部が剥がれる。
2・・・離型層
5・・・保護層
6・・・接着層
7・・・受容層
8・・・ヒートシール層
9・・・溶融インキ層
10・・・転写層
100・・・熱転写シート
Claims (10)
- 基材、離型層、転写層がこの順で積層された熱転写シートであって、
前記離型層と前記転写層の間が、前記転写層の転写界面であり、
前記離型層が、酸変性ポリオレフィンを含有している、熱転写シート。 - 前記酸変性ポリオレフィンの融点が、75℃以上である、請求項1に記載の熱転写シート。
- 前記酸変性ポリオレフィンの重量平均分子量(Mw)が、50000以上である、請求項1又は2に記載の熱転写シート。
- 前記酸変性ポリオレフィンの酸変性量が、1.4質量%以上5質量%以下である、請求項1乃至3の何れか1項に記載の熱転写シート。
- 前記転写層が、単層構造、又は積層構造であり、前記転写層を構成する層のうち前記離型層と接する層が、酸価が20mgKOH/g以下の樹脂を含有している、請求項1乃至4の何れか1項に記載の熱転写シート。
- 前記酸価が20mgKOH/g以下の樹脂が、アクリル樹脂、塩化ビニル-酢酸ビニル共重合体、及びポリエステルの何れかである、請求項5に記載の熱転写シート。
- 前記基材と前記離型層とが接しており、
前記基材が、ポリエステルを含有している、請求項1乃至6の何れか1項に記載の熱転写シート。 - 前記転写層が受容層を含む単層構造、又は積層構造であり、
前記転写層が積層構造である場合、前記受容層は前記転写層の表面に位置する、請求項1乃至7の何れか1項に記載の熱転写シート。 - 前記転写層が、離型層側から、保護層、受容層がこの順で積層された積層構造である、請求項8に記載の熱転写シート。
- 前記転写層がヒートシール層を含む単層構造、又は積層構造であり、
前記転写層が積層構造である場合、前記ヒートシール層は前記転写層の転写界面に位置する、請求項1乃至7の何れか1項に記載の熱転写シート。
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PCT/JP2020/013373 WO2020203564A1 (ja) | 2019-03-29 | 2020-03-25 | 熱転写シート |
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US (1) | US20220184987A1 (ja) |
EP (1) | EP3950370A1 (ja) |
JP (1) | JP6915755B2 (ja) |
KR (1) | KR102538831B1 (ja) |
CN (1) | CN113646181B (ja) |
WO (1) | WO2020203564A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007176011A (ja) | 2005-12-28 | 2007-07-12 | Dainippon Printing Co Ltd | 保護層熱転写シート |
JP2009137020A (ja) * | 2007-12-03 | 2009-06-25 | Dainippon Printing Co Ltd | 保護層転写シート、保護層転写方法及び印画物 |
JP2011020351A (ja) * | 2009-07-16 | 2011-02-03 | Unitika Ltd | 転写シート |
JP2015145064A (ja) * | 2014-01-31 | 2015-08-13 | ゼネラル株式会社 | 感熱転写印刷用粘着シート |
JP2017109323A (ja) * | 2015-12-14 | 2017-06-22 | 大日本印刷株式会社 | 熱転写シート |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012066530A (ja) * | 2010-09-25 | 2012-04-05 | Dainippon Printing Co Ltd | 熱転写シート及びそれを用いた画像形成方法 |
JP5516806B2 (ja) * | 2012-09-28 | 2014-06-11 | 大日本印刷株式会社 | 保護層転写シート |
EP3053740B1 (en) * | 2013-09-30 | 2022-11-23 | Dai Nippon Printing Co., Ltd. | Protective layer transfer sheet |
US10864702B2 (en) * | 2015-12-25 | 2020-12-15 | Dai Nippon Printing Co., Ltd. | Thermal transfer sheet |
JP2017154393A (ja) * | 2016-03-02 | 2017-09-07 | 大日本印刷株式会社 | 熱転写シート |
US11104172B2 (en) * | 2016-03-18 | 2021-08-31 | Dai Nippon Printing Co., Ltd. | Intermediate transfer medium, combination of intermediate transfer medium and thermal transfer sheet, and method for forming print |
JP6812909B2 (ja) * | 2017-06-15 | 2021-01-13 | 京セラドキュメントソリューションズ株式会社 | 転写捺染方法および捺染物の製造方法 |
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2020
- 2020-03-25 CN CN202080022676.4A patent/CN113646181B/zh active Active
- 2020-03-25 EP EP20784540.5A patent/EP3950370A1/en not_active Withdrawn
- 2020-03-25 WO PCT/JP2020/013373 patent/WO2020203564A1/ja unknown
- 2020-03-25 KR KR1020217027818A patent/KR102538831B1/ko active IP Right Grant
- 2020-03-25 JP JP2020564687A patent/JP6915755B2/ja active Active
- 2020-03-25 US US17/593,086 patent/US20220184987A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007176011A (ja) | 2005-12-28 | 2007-07-12 | Dainippon Printing Co Ltd | 保護層熱転写シート |
JP2009137020A (ja) * | 2007-12-03 | 2009-06-25 | Dainippon Printing Co Ltd | 保護層転写シート、保護層転写方法及び印画物 |
JP2011020351A (ja) * | 2009-07-16 | 2011-02-03 | Unitika Ltd | 転写シート |
JP2015145064A (ja) * | 2014-01-31 | 2015-08-13 | ゼネラル株式会社 | 感熱転写印刷用粘着シート |
JP2017109323A (ja) * | 2015-12-14 | 2017-06-22 | 大日本印刷株式会社 | 熱転写シート |
Also Published As
Publication number | Publication date |
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KR102538831B1 (ko) | 2023-05-31 |
JP6915755B2 (ja) | 2021-08-04 |
US20220184987A1 (en) | 2022-06-16 |
JPWO2020203564A1 (ja) | 2021-04-30 |
CN113646181B (zh) | 2022-12-30 |
KR20210118936A (ko) | 2021-10-01 |
CN113646181A (zh) | 2021-11-12 |
EP3950370A1 (en) | 2022-02-09 |
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