JP2017097018A - Decoration sticker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decoration sticker which can form a heat transfer image using a sublimation type heat transfer method, and is excellent in mountability when a seal base material having the heat transfer image formed thereon is stuck onto a body to be transferred.SOLUTION: In a decoration sticker 10 having a seal base material 5 peelable from a release sheet 1 provided on the release sheet 1, the seal base material 5 has such a lamination structure that an adhesive layer 2 and a film 3 are laminated in this order from the side of the release sheet 1, and a film 3 which contains a resin that can dye a sublimation die and has elongation according to JIS-K-7161 of 150% or more and 400% or less is used as the film 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a decorative seal.

  Conventionally, for the purpose of decorating a transfer target (giving design to the transfer target), a decorative seal having a seal substrate on which a thermal transfer image is formed is used. Attempts have been made to affix a seal substrate on which an image has been formed. As the decorative seal, for example, a pressure-sensitive adhesive layer and a base material layer (referred to as a decorative layer) on which a thermal transfer image is formed on a release sheet (sometimes referred to as a release sheet or a release material). However, in use, the seal substrate is peeled off from the release sheet, and the pressure-sensitive adhesive layer is formed on the transferred material. Is brought into contact with each other, so that the seal substrate is pasted on the transfer target.

  Examples of the transfer object to which the seal substrate is attached include a transfer object having a flat surface to be attached, such as a card, and a transfer object having a curved surface to be attached, such as a human body or a beverage container. is there. For example, Patent Document 1 proposes a decorative seal for decoration on a transfer object having a flat surface to be pasted such as a message card, and Patent Document 2 discloses a cover having a curvature such as a nail. A decorative seal for the purpose of decorating the transfer body has been proposed.

  In order to sufficiently enhance the decorative property of the transfer object, it is necessary to affix the seal substrate on which the thermal transfer image is formed on the transfer object without causing wrinkles or the like. By the way, when a material having a curvature is used as a material to be transferred, it is difficult to affix the seal substrate without wrinkles on the material to be transferred. There is room for improvement.

  In recent years, it has been widely practiced to form a thermal transfer image by a sublimation thermal transfer method which is excellent in halftone reproducibility and gradation and can clearly express a full color image as a document. However, in the present situation, the examination of a sealing substrate that can form a thermal transfer image by a sublimation thermal transfer system has not been sufficiently conducted.

JP 2002-6745 A JP 2014-46103 A

  The present invention has been made in view of such circumstances, and a sublimation transfer method can form a thermal transfer image for decorating a transfer material on a seal substrate, and the thermal transfer image is formed. It is a main object of the present invention to provide a decorative seal capable of suppressing the generation of wrinkles when a sealed base material is affixed on a transfer target.

  The present invention for solving the above-mentioned problems is a decorative seal in which a seal substrate is provided on a release sheet so as to be peelable from the release sheet, and the seal substrate is formed from the release sheet side. The pressure-sensitive adhesive layer and the film are laminated in this order, and the film contains a resin capable of dyeing a sublimation dye, and has an elongation percentage according to JIS-K-7161. It is in the range of 150% or more and 400% or less.

  Moreover, the said film may contain the vinyl chloride resin as resin which can dye the said sublimation dye.

  Further, the thickness of the film may be 20 μm or more and 60 μm or less.

  According to the decorative seal of the present invention, a heat transfer image for decorating a transfer target can be formed on the seal substrate by a sublimation transfer method, and the seal substrate on which the heat transfer image is formed is transferred. Generation of wrinkles can be suppressed when sticking on the body.

It is a schematic sectional drawing which shows an example of the decoration seal | sticker of this invention.

<< decorative seal >>
Hereinafter, a decorative seal 10 according to an embodiment of the present invention (hereinafter referred to as a decorative seal according to an embodiment) will be described with reference to the drawings. As shown in FIG. 1, the decorative seal according to one embodiment has a configuration in which a seal substrate 5 is provided on a release sheet 1 so as to be peelable from the release sheet. Moreover, the sealing base material 5 is exhibiting the laminated structure by which the adhesion layer 2 and the film 3 are laminated | stacked in this order from the release sheet 1 side so that it may illustrate. Hereinafter, each configuration of the decorative seal 10 will be described.

(Release sheet)
In the release sheet 1, the adhesive layer 2 of the seal base material 5 adheres to another object or the decorative seal 10 is wound up until the seal base material 5 is stuck on the transfer target. It is provided to suppress the occurrence of blocking.

  The release sheet 1 includes a release sheet base material for supporting the seal base material 5 and a release layer provided as necessary. That is, the release sheet substrate and the release layer provided as necessary constitute the release sheet 1.

  Examples of the release sheet substrate include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene terephthalate / isophthalate copolymer, polyolefin resins such as polyethylene, polypropylene, and polymethylpentene, polyvinyl fluoride, and polyvinylidene fluoride. , Polyfluorinated ethylene resins such as polytetrafluoroethylene and ethylene-tetrafluoroethylene copolymer, polyamides such as nylon 6 and nylon 6.6, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / Vinyl acetate copolymers, ethylene / vinyl alcohol copolymers, vinyl copolymers such as polyvinyl alcohol and vinylon, cellulose resins such as cellulose triacetate and cellophane, methyl polymethacrylate, ethyl polymethacrylate Ethyl polyacrylate, acrylic resins such as polybutyl acrylate, polystyrene, polycarbonate, polyarylate, can be a synthetic resin film or monolayer of sheets or laminates such as polyimide or the like is exemplified.

  Moreover, the mold release layer arbitrarily provided on the base material for mold release sheets contains binder resin and a mold release agent. Examples of the releasing agent include waxes such as fluororesin, paraffin wax, montan wax, and synthetic wax. Examples of the binder resin include acrylic resin, cellulose resin, and vinyl resin.

  Moreover, you may make a base material for mold release sheets contain a mold release agent, without providing a mold release layer. In addition, the decorative seal 10 of one embodiment has a feature in the sealing base material 5 including the adhesive layer 2 and the film 3. Therefore, the release sheet 1 is any of conventionally known release sheets. Can also be used.

  Although there is no limitation in particular about the thickness of the release sheet 1, it is preferable that they are 50 micrometers or more and 200 micrometers or less. For the purpose of improving the adhesion between the release sheet 1 and the adhesive layer 2 described later, the surface of the release sheet 1 can be easily subjected to corona discharge treatment, plasma treatment, primer coating, degreasing treatment, surface roughening treatment, and the like. An adhesive treatment can also be performed.

(Seal base material)
As shown in FIG. 1, a seal substrate 5 is provided on the release sheet 1. The seal substrate 5 is provided so as to be peelable from the release sheet 1 and has a laminated structure in which the adhesive layer 2 and the film 3 are laminated in this order from the release sheet 1 side. In the decorative seal 10 according to an embodiment, the seal substrate 5 is peeled from the release sheet 1 and the transfer target is decorated by bringing the adhesive layer 2 of the seal substrate 5 into contact with the transfer target. be able to. The seal substrate 5 may include an arbitrary layer provided between the adhesive layer 2 and the film 3 or on the film 3.

(Adhesive layer)
There is no limitation in particular about the adhesion layer 2 which comprises the sealing base material 5, A conventionally well-known solvent type or aqueous adhesive can be used. Examples of the adhesive include vinyl acetate resin, acrylic resin, vinyl acetate-acrylic copolymer, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, ethylene acrylic acid copolymer, ethylene-acrylic acid. Examples thereof include ester copolymers, polyurethane resins, natural rubber, chloroprene rubber, and nitrile rubber. The pressure-sensitive adhesive layer 2 may contain one of these resins alone or may contain two or more.

  Although there is no limitation in particular about the thickness of the adhesion layer 2, it is preferable that they are 1 micrometer or more and 100 micrometers or less. The method for forming the adhesive layer 2 is not particularly limited, and a coating solution is prepared by dispersing or dissolving the pressure-sensitive adhesive and additives added as necessary in a suitable solvent. It can be formed by applying and drying on the mold sheet 1.

(the film)
On the pressure-sensitive adhesive layer 2, a film 3 constituting the seal substrate 5 is provided. And the decorative seal 10 of one Embodiment contains the resin in which the film 3 can dye | stain a sublimation dye, and the elongation rate based on JIS-K-7161 is the range of 150% or more and 400% or less. It is characterized by being within.

  According to the decorative seal 10 of one embodiment having this feature, since the film 3 contains a resin capable of dyeing a sublimable dye, on the seal substrate 1, that is, by a sublimation thermal transfer method, A thermal transfer image can be formed on the film 3. Moreover, when sticking the sealing base material 5 containing the film 3 on a to-be-transferred body by making elongation rate based on JIS-K-7161 of the film 3 into the range of 150% or more and 400% or less, The generation of wrinkles can be suppressed. In particular, even when the surface to be transferred of the transfer object has a curvature, it is possible to suppress the occurrence of wrinkles when the seal substrate 5 is applied on the transfer object. That is, it is possible to improve the mountability when the seal substrate 5 is stuck on the transfer target. Furthermore, the thermal transfer image formed on the film 3 can be prevented from fading. In other words, the preservability of the thermal transfer image can be improved.

  The sublimation thermal transfer system referred to in the present specification is a sublimation dye contained in a dye layer by using a thermal transfer sheet having a dye layer containing a sublimation dye and applying energy to the back side of the thermal transfer sheet. Is transferred and diffused on the film 3 to form a thermal transfer image.

In addition, the elongation percentage based on JIS-K-7161 is measured by using a tensile tester, pulling the test object at a speed of 200 mm / min, and elongating the test object when the test object is cut (ruptured). It is a rate and is calculated by the following formula (1).
Elongation rate (%) = 100 × (L−L ₀ ) (1)
(L is the length of the test object at break, and L ₀ is the length of the test object before the test)
As the tensile tester, for example, a Tensilon universal material tester can be used.

  In the decorative seal 10 of one embodiment, the film 3 has an elongation rate in accordance with JIS-K-7161 in the range of 150% or more and 400% or less, which is an essential condition. Is less than 150%, it is because the seal substrate cannot be pasted on the transfer body having the curvature to be curved without causing wrinkles.

  By the way, when the main object is to affix the seal base material 5 without causing wrinkles on a transfer object having a curvature to be applied, the elongation of the film 3 is 150% or more. However, as described above, the film 3 contains a resin capable of dyeing a sublimation dye, and a thermal transfer image can be formed by a sublimation thermal transfer method.

  The elongation rate of the film 3 is closely related to the mounting property when the seal substrate 5 is stuck on the transfer target and the fading property (sometimes referred to as preservability) of the thermal transfer image formed on the film 3. When the film elongation rate is increased with a focus on wearability, bleeding tends to occur in the thermal transfer image formed on the film 3, and the thermal transfer image tends to fade. is there. That is, it can be said that the mountability on the film 3 and the color resistance of the formed thermal transfer image are in a trade-off relationship. The fading of the thermal transfer image is presumed to be due to the fact that the sublimable dye easily diffuses in the film 3 as the elongation of the film 3 increases.

  In consideration of this point, the decorative film 10 according to the embodiment is based on the condition that the upper limit value of the elongation percentage of the film 3 in accordance with JIS-K-7161 is 400%. According to the decorative seal 10 of one embodiment in which the upper limit of the elongation percentage of the film 3 is 400%, as described above, the sublimable dye in the film 3 is improved while the mounting property of the seal substrate 5 is good. Diffusion can be suppressed and fading of the formed thermal transfer image can be suppressed. That is, a clear thermal transfer image can be formed on the film 3.

  In addition, the improvement of the said mounting property in the decorative seal 10 of one embodiment is brought about by making the elongation rate based on JIS-K-7161 of the film 3 150% or more, and as the sealing base material 5 whole. Even when the elongation according to JIS-K-7161 when viewed is 150% or more, when the elongation of the film 3 is less than 150%, the mounting property of the seal base material 5 is sufficient. It cannot be satisfied.

  As described above, the elongation percentage of the film 3 in accordance with JIS-K-7161 satisfies the condition that it is in the range of 150% or more and 400% or less, thereby improving the mounting property of the seal substrate 5; The sublimation thermal transfer method can suppress the color fading in the thermal transfer image formed on the film 3, but when the purpose is to further improve the wearability or to suppress the color fading, The elongation based on JIS-K-7161 is more preferably in the range of more than 150% and not more than 300%, and particularly preferably in the range of more than 200% and not more than 300%.

  The resin that can be dyed with the sublimation dye contained in the film 3 is not particularly limited. For example, polyolefin resin such as polypropylene, halogenated resin such as polyvinyl chloride or polyvinylidene chloride, polyvinyl acetate, vinyl chloride-acetic acid Vinyl resins such as vinyl copolymers, ethylene-vinyl acetate copolymers or polyacrylates, polyester resins such as polyethylene terephthalate or polybutylene terephthalate, polystyrene resins, polyamide resins, and olefins such as ethylene or propylene. Examples thereof include copolymer resins with other vinyl polymers, cellulose resins such as ionomers or cellulose diastases, polycarbonates, and acrylic resins. The film 3 may contain one kind of resin as a resin capable of dyeing a sublimable dye, or may contain two or more kinds. Moreover, you may contain resin which does not have the dyeing property of a sublimation dye with resin which can dye a sublimation dye.

  Among these, the film 3 preferably contains a polyvinyl chloride resin, a polyester resin, an acrylic resin, or a cellulose resin as a resin that can be dyed with a sublimable dye, and particularly contains a polyvinyl chloride resin. More preferably. Polyvinyl chloride resin has high dye dyeing property among resins capable of dyeing sublimation dyes. The high dye dyeing property and the elongation rate of the film are 150% or more and 400% or less. Due to the synergistic effect of being within the range, it is possible to more effectively prevent fading of the thermal transfer image formed on the film 3 by the sublimation thermal transfer method.

  Further, according to the film 3 containing a polyvinyl chloride resin and having an elongation rate in the range of 150% or more and 400% or less, it is formed even when the thickness of the film 3 is increased. It is possible to suppress the fading of the thermal transfer image. In general, when the thickness of a layer containing a resin capable of dyeing a sublimable dye is increased, in the layer containing a resin capable of dyeing a sublimable dye, The transferred sublimation dye diffuses and settles, and fading such as bleeding tends to occur in the formed thermal transfer image. Therefore, the film 3 containing a polyvinyl chloride resin and having an elongation of 150% or more and 400% or less increases the thickness of the film 3 so that the seal substrate 5 is firm. It can be said that the film 3 is suitable.

  Moreover, the film 3 may contain the plasticizer for adjusting the elongation rate of the film 3 in the said range with resin which can dye the said sublimable dye. By allowing the film 3 to contain a plasticizer, the elongation rate of the film 3 can be easily adjusted within a range of 150% to 400%.

  Examples of the plasticizer include phthalic acid plasticizers such as dioctyl phthalate, diisononyl phthalate, octyl decyl phthalate and diisodecyl phthalate, adipic acid such as di-2-ethylhexyl adipate, diisononyl adipate and diisodecyl adipate Plasticizer, di-2-ethylhexyl azelate, di-2-ethylhexyl sebacate, tricresyl phosphate, trixyl phosphate, tributyl phosphate, tri-2-ethylhexyl phosphate, octyl diphenyl phosphate, chlorinated paraffin, chlorine Fatty acid ester, epoxidized soybean oil and the like. The film 3 may contain one type of plasticizer or two or more types of lubricant.

  There is no limitation in particular about content of a plasticizer, What is necessary is just to set suitably according to the classification of resin which can dye the sublimation dye contained in the film 3. FIG.

  In one embodiment, the decorative seal 10 has the film 3 positioned on the outermost surface, so that no other layer for receiving a sublimable dye, such as a receiving layer, is provided by a sublimation thermal transfer method. A thermal transfer image can be formed on the surface of the material 5. That is, according to the decorative seal 10 of one embodiment, it is not particularly necessary to provide another layer on the film 3, and the manufacturing cost can be reduced by positioning the film 3 on the outermost surface. .

  Although there is no limitation in particular about the thickness of the film 3, when positioning the film 3 in the outermost surface of the decoration seal 10, it is preferable that the thickness of the film 3 is 10 micrometers or more and 100 micrometers or less, and is 20 micrometers or more and 60 micrometers or less. Is more preferable. By making the thickness of the film 3 within the above-mentioned preferable range, it is possible to further improve the storage stability of the decorative image and the wearability.

  The film 3 may contain, for example, stabilizers, titanium oxide, silica, and other additives in addition to the resins other than those exemplified above and plasticizers added as necessary.

  Although there is no limitation in particular about the formation method of the film 3, Resin illustrated above, the plasticizer added as needed, and arbitrary so that the elongation rate of the film 3 to be formed may be 150% or more and 400% or less The film 3 can be formed by mixing these additives at an arbitrary ratio and heat-processing them. Further, instead of thermal processing, the resin exemplified above, a plasticizer added as necessary, or a coating solution in which an arbitrary additive is dispersed or dissolved in an appropriate solvent, the adhesive layer 2 or the adhesive The film 3 can also be formed by applying and drying on an arbitrary layer provided on the layer 2.

  The decorative film 10 of one embodiment is for increasing the decorative property of the sealing base material 5 between the adhesive layer 2 and the film 3 or on the film 3, or for giving a predetermined function to the sealing base material. Arbitrary layers can also be provided. Examples of the layer provided between the adhesive layer 2 and the film 3 include a hologram layer. As an arbitrary hologram layer, for example, a layer provided with a concavo-convex pattern (interference fringes) or a sheet on which a commercially available hologram is formed may be used. And the like colored.

  In addition, since the elongation percentage of the film in the decorative seal 10 of one embodiment is 150% or more, it is difficult to form an arbitrary layer on the film 3 by applying and drying the coating liquid. Depending on the elongation ratio of an arbitrary layer provided, when the seal substrate 5 is stuck on the transfer target, wrinkles are generated in the arbitrary layer, and the design of the transfer target to which the seal base 5 is attached may be May decrease. Although the present invention does not exclude that an arbitrary layer is provided on the film 3 as a layer constituting the seal substrate 5, the film 3 is located on the outermost surface of the decorative seal 10 as described above. It is preferable.

<Transfer material>
There is no limitation on the transfer object to be decorated using the decorative film 10 of one embodiment. For example, the surface to which the seal base material 5 such as a card is attached may be used as the transfer object, and the surface to which the seal base material 5 is attached such as a human body such as a nail or a container. You may use what has a curvature. In particular, the decorative seal 10 of one embodiment can be suitably used for a nail seal or the like intended for decoration of nails having a discontinuous curvature on the surface to which the seal substrate 5 is applied.

<< Image Forming Method >>
Hereinafter, an image forming method using the decorative seal of one embodiment (hereinafter referred to as an image forming method of one embodiment) will be described. An image forming method according to an embodiment uses the decorative seal 10 according to the embodiment described above and a thermal transfer sheet including a dye layer containing a sublimable dye in combination with the sublimation thermal transfer method. A heat transfer image is formed by transferring a sublimation dye onto the film of the decorative seal 10. Specifically, the decorative seal 10 of the embodiment described above and a thermal transfer sheet described later are overlapped so that the film 3 of the decorative seal 10 and the dye layer of the thermal transfer sheet face each other, and the thermal transfer sheet On the film 3 containing a resin having dye-dyeing property, the sublimation dye contained in the dye layer of the thermal transfer sheet is applied from the back side by heat energy corresponding to the image information by heating means such as a thermal head. This is a method for forming a thermal transfer image on the film 3 by shifting to. The thermal transfer image can also be formed using various known printers.

  As the decorative seal 10 used in the image forming method of the embodiment, the decorative seal 10 of the embodiment described above can be used as it is, and detailed description thereof is omitted here. The decorative seal 10 used in the image forming method according to the embodiment has the film 3 positioned on the outermost surface.

(Thermal transfer sheet)
As the thermal transfer sheet used in the image forming method of one embodiment, a conventionally known thermal transfer sheet in which a dye layer is provided on one surface of a substrate can be appropriately selected and used. Hereinafter, an example is given and demonstrated about the base material and dye layer of a thermal transfer sheet.

(Base material)
As the base material, any material may be used as long as it has a conventionally known heat resistance and strength. For example, polyethylene terephthalate film, 1,4-polycyclohexylenedimethylene terephthalate film, polyethylene naphthalate film, polyphenylene Sulfide film, polystyrene film, polypropylene film, polysulfone film, aramid film, polycarbonate film, polyvinyl alcohol film, cellophane, cellulose derivatives such as cellulose acetate, polyethylene film, polyvinyl chloride film, nylon film, polyimide film, ionomer film, etc. Resin film; paper such as condenser paper, paraffin paper, synthetic paper; non-woven fabric; composite of paper, non-woven fabric and resin, etc.

  Although there is no limitation in particular about the thickness of a base material, it is the range of 0.5 to 50 micrometer normally, Preferably it is the range of about 1.5 to 10 micrometer.

  The base material may be surface-treated in order to improve the adhesiveness with an adjacent layer. As the surface treatment, known resin surface modification techniques such as corona discharge treatment, flame treatment, ozone treatment, ultraviolet treatment, radiation treatment, surface roughening treatment, chemical treatment, plasma treatment, grafting treatment, etc. can be applied. it can. Only one type of surface treatment may be performed, or two or more types may be performed. Moreover, the undercoat layer (primer layer) may be provided in the one surface or both surfaces as needed.

(Dye layer)
The dye layer contains a sublimable dye and a binder resin as essential components. Examples of sublimation dyes include diarylmethane dyes; triarylmethane dyes; thiazole dyes; merocyanine dyes; pyrazolone dyes; methine dyes; indoaniline dyes; Azomethine dyes such as azomethine and pyridone azomethine; xanthene dyes; oxazine dyes; cyanostyrene dyes such as dicyanostyrene and tricyanostyrene; thiazine dyes; azine dyes; acridine dyes; benzeneazo dyes; Azo dyes such as azo, isothiazole azo, pyrrole azo, pyrazole azo, imidazole azo, thiadiazole azo, triazole azo, disazo; spiropyran dyes; indolinospiropyran dyes ; Fluoran dyes; rhodamine lactam dyes; naphthoquinone dyes; anthraquinone dyes; quinophthalone dyes; and the like, and more specifically, the compounds exemplified in JP-A-7-149062 and the like. The sublimable dye is preferably in the range of 5% by mass to 90% by mass and more preferably in the range of 10% by mass to 70% by mass with respect to the total solid content of the dye layer. By setting the content of the sublimable dye within the above range, the printing density and the storage stability can be improved.

  Examples of the binder resin for supporting the dye include cellulose resins such as ethyl cellulose resin, hydroxyethyl cellulose resin, ethyl hydroxy cellulose resin, methyl cellulose resin, nitrocellulose resin, and cellulose acetate resin, polyvinyl alcohol resin, and polyvinyl acetate resin. , Polyvinyl butyral resin, polyvinyl acetal resin, vinyl resins such as polyvinyl pyrrolidone, acrylic resins such as poly (meth) acrylate and poly (meth) acrylamide, polyurethane resins, polyamide resins, polyester resins, phenoxy resins, phenols Examples thereof include resins and epoxy resins. Among these, cellulose-based, vinyl-based, acrylic-based, polyurethane-based, and polyester-based resins are preferable from the viewpoints of heat resistance, dye transferability, and the like.

  The dye layer may contain a release agent, inorganic fine particles, organic fine particles and the like. Examples of the mold release agent include silicone oil, polyethylene wax, and phosphate ester. Examples of the silicone oil include straight silicone oil, modified silicone oil, and cured products thereof. The silicone oil may be reactive or non-reactive. Inorganic fine particles include carbon black, aluminum, molybdenum disulfide and the like. The modified silicone oil can be classified into a reactive silicone oil and a non-reactive silicone oil. The reactive silicone oil includes amino modification, epoxy modification, carboxyl modification, hydroxy modification, methacryl modification, mercapto modification, phenol modification, one-terminal reactivity and heterofunctional modification. Non-reactive silicone oils include polyether modification, methylstyryl modification, alkyl modification, higher fatty acid ester modification, hydrophilic special modification, higher alkoxy modification, fluorine modification and the like. A preferable addition amount of the silicone oil is in the range of 0.1% by mass to 15% by mass, and more preferably in the range of 0.3% by mass to 10% by mass with respect to the mass of the binder. Examples of the organic fine particles include polyethylene wax.

  The dye layer is, for example, a dye layer coating solution in which a sublimable dye, a binder resin, and various components optionally added as necessary are dispersed or dissolved in an appropriate solvent, on a substrate. It can be formed by coating and drying using a conventionally known coating method. Conventionally known coating methods include a ravia printing method, a reverse roll coating method using a gravure plate, a roll coater, a bar coater and the like. Examples of the solvent include toluene, methyl ethyl ketone, ethanol, isopropyl alcohol, cyclohexanone, dimethylformamide [DMF] and the like. There is no limitation in particular about the thickness of a dye layer, Usually, it is the range of 0.2 micrometer or more and 5 micrometers or less.

(Back layer)
In addition, a back layer for improving heat resistance, running performance of the thermal head during printing, and the like may be provided on the other surface of the substrate.

  The back layer can be formed by appropriately selecting a conventionally known thermoplastic resin or the like. As such a thermoplastic resin, for example, polyester resins, polyacrylate resins, polyvinyl acetate resins, styrene acrylate resins, polyurethane resins, polyethylene resins, polypropylene resins, and other polyolefin resins, Polystyrene resin, polyvinyl chloride resin, polyether resin, polyamide resin, polyimide resin, polyamideimide resin, polycarbonate resin, polyacrylamide resin, polyvinyl chloride resin, polyvinyl butyral resin, polyvinyl acetoacetal resin, etc. Examples thereof include thermoplastic resins such as polyvinyl acetal resin, and silicone modified products thereof. Among these, from the viewpoint of heat resistance, a polyamideimide resin or a modified silicone product thereof can be preferably used.

  In addition to the above thermoplastic resin, the back layer has a wax, a higher fatty acid amide, a phosphoric ester compound, a metal soap, a silicone oil, a surfactant release agent, etc., a fluororesin for the purpose of improving slip properties. It is preferable that various additives such as organic powder such as silica, clay, talc, calcium carbonate and the like are contained, and it is particularly preferable that at least one kind of phosphate ester or metal soap is contained. .

  The back layer is, for example, a gravure printing method, a screen printing method, a coating liquid obtained by dispersing or dissolving the above thermoplastic resin and various additives added as necessary in a suitable solvent. It can be formed by coating and drying by known means such as reverse roll coating printing using a gravure plate. The thickness of the back layer 4 is preferably 2 μm or less, and more preferably in the range of 0.1 μm to 1 μm.

  A thermal transfer sheet used for forming a thermal transfer image may have a configuration in which a single dye layer is provided on a substrate, and a plurality of dye layers having different hues are provided on the same surface of the substrate. You may exhibit the structure provided sequentially. It is also possible to use a thermal transfer sheet in which one or two or more dye layers and a protective layer are provided in the surface order on the same surface of the substrate.

  Next, an Example is given and this invention is demonstrated further more concretely.

  A polyethylene terephthalate film having a thickness of 100 μm was used as a release sheet, and a sealing substrate including an adhesive layer having a thickness of 25 μm and a film shown in Table 1 below was provided on the release sheet in this order. The decorative seals of Examples 1 to 10 and Comparative Examples 1 to 3 were used. In addition, the elongation rate in a table | surface is the elongation rate measured based on JIS-K-7161.

(Wearability evaluation)
Using the decorative seals of each Example and Comparative Example, the sealing base material peeled from the release sheet was prepared from a commercially available nail tip A (width: 20 mm, length 25 mm) and a commercially available nail tip B (width: 10 mm, Attached to each of three sheets (length 16 mm), the wearability at this time was evaluated according to the following evaluation criteria. The evaluation results are shown in Table 2.

<Evaluation criteria>
A: All 6 sheets could be pasted without causing wrinkles.
○: Some wrinkles occurred in 6 sheets, but there was no problem in appearance. ×: Wrinkles occurred in 2 sheets or more, and there was a problem in appearance.

(Dye dyeing property evaluation)
The decorative seal of each example and comparative example was combined with the thermal transfer sheet prepared under the following conditions, and a black solid image was printed on the film of the decorative seal of each example and comparative example under the following printing conditions. The reflection density of the black solid image was measured with a spectrophotometer (spectrolino manufactured by Gretag Macbeth Co., Ltd.), and the dyeing property was evaluated according to the following evaluation criteria. The evaluation results are shown in Table 2.

(Creation of thermal transfer sheet)
A polyethylene terephthalate film having a thickness of 5 μm was used as a base material, and a back layer coating solution having the above composition was coated thereon so as to be 1.0 g / m ² upon drying to form a back layer. Next, a dye primer layer was formed on the other surface of the base material by applying a coating solution for a dye primer layer having the following composition to 0.15 g / m ² when dried. On this dye primer layer, the yellow, magenta, and cyan dye layer coating liquids having the above-described composition are applied in a surface order so as to be 0.7 g / m ² when dried. A cyan dye layer was formed to obtain a thermal transfer sheet.

<Dye primer layer coating solution>
・ Water-based urethane resin (solid content: 26%) (Tg: -17 ° C) 5 parts (Superflex 650 Daiichi Kogyo Seiyaku Co., Ltd.)
・ 95 parts of water / isopropyl alcohol (1: 1) mixed solvent

<Coating solution for yellow dye layer>
・ 5 parts of Solvent Yellow 93 ・ 4 parts of polyvinyl acetoacetal resin
(KS-5 Sekisui Chemical Co., Ltd.)
・ Toluene 50 parts ・ Methyl ethyl ketone 50 parts

<Coating liquid for magenta dye layer>
・ Disper Thread 60 3 parts ・ Dispers Violet 26 3 parts ・ Polyvinylacetoacetal resin 5 parts
(KS-5 Sekisui Chemical Co., Ltd.)
・ Toluene 50 parts ・ Methyl ethyl ketone 50 parts

<Cyan dye layer coating solution>
-Solvent Blue 63 3 parts-Disperse Blue 354 2.5 parts-Polyvinylacetoacetal resin 5 parts (KS-5 Sekisui Chemical Co., Ltd.)
・ Toluene 50 parts ・ Methyl ethyl ketone 50 parts

(Printing conditions)
・ Thermal head: F3598 (Toshiba Hokuto Electronics Co., Ltd.)
-Heating element average resistance: 5176 (Ω)
・ Print density in the main scanning direction: 300 dpi
-Sub-scanning direction printing density: 300 dpi
・ Printing power: 0.12 (W / dot)
1 line cycle: 2 (msec.)
・ Pulse duty: 85%
-Printing start temperature: 35.5 (° C)

<Evaluation criteria>
○: The concentration is 1.5 or more.
Δ: The concentration is 0.5 or more and less than 1.5.
X: The density is less than 0.5.

(Bk image storage stability evaluation)
In the above dye dyeing evaluation, a decorative sticker having a solid black image formed on a film is stored for 48 hours in a 37 ° C. dry environment, and the residual density of the Bk image is determined by the reflection density before and after storage. The Bk image storage stability was evaluated according to the following evaluation criteria. The evaluation results are shown in Table 2. The reflection density was measured with a spectrophotometer (spectrolino manufactured by Gretag Macbeth).

<Evaluation criteria>
◯: The density residual ratio of the Bk image is 95% or more. Δ: The density residual ratio of the Bk image is 90% or more and less than 95%.
X: The density residual ratio of the Bk image is less than 90%.

10 Decorative Seal 1 Release Sheet 2 Adhesive Layer 3 Film 5 Seal Base Material

Claims (3)

On the release sheet, a decorative seal provided with a seal substrate so as to be peelable from the release sheet,
The sealing base material has a laminated structure in which an adhesive layer and a film are laminated in this order from the release sheet side,
The decorative seal characterized in that the film contains a resin capable of dyeing a sublimable dye and has an elongation percentage in the range of 150% to 400% in accordance with JIS-K-7161.   The decorative seal according to claim 1, wherein the film contains a vinyl chloride resin as a resin capable of dyeing the sublimable dye.   The decorative seal according to claim 1 or 2, wherein the film has a thickness of 20 µm or more and 60 µm or less.

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