JP2017136748A - Seal type thermal transfer image receiving sheet and manufacturing method of printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal type thermal transfer image receiving sheet having excellent transparency before printing and image expression property after printing.SOLUTION: A seal type thermal transfer image receiving sheet includes: a release sheet part; and a seal part having, from the release sheet part side, an adhesive layer, a substrate layer, a primer layer and a reception layer in this order. The seal part is removable from the release sheet part. In the seal type thermal transfer image receiving sheet, the thermal transfer image receiving sheet has glossiness of 80% or more, and a haze value of 10% or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seal-type thermal transfer image-receiving sheet, and more specifically, includes a release sheet portion, and a seal portion including an adhesive layer, a base material layer, and a receiving layer in this order from the release sheet portion side, The present invention relates to a seal-type thermal transfer image receiving sheet in which the seal portion is detachable from a release sheet portion. The present invention also relates to a method for producing a printed product using a seal-type thermal transfer image receiving sheet.

  Excellent thermal transparency, high reproducibility and gradation of intermediate colors, and easy formation of high-quality images equivalent to conventional full-color photographic images. It is widely done. Examples of the printed material on which a thermal transfer image is formed on a transfer object include digital photographs, ID cards, driver's licenses, membership cards, and other ID cards used in many fields.

  For the formation of a thermal transfer image by a sublimation transfer method, a thermal transfer sheet in which a dye layer is provided on one side of a substrate and a transfer target, for example, a thermal transfer in which a receiving layer is provided on one side of another substrate An image receiving sheet is used. Then, the receiving layer of the thermal transfer image receiving sheet and the dye layer of the thermal transfer sheet are superposed, and heat is applied from the back side of the thermal transfer sheet by the thermal head to transfer the dye of the dye layer onto the receiving layer, thereby receiving the receiving layer. A printed matter having a thermal transfer image formed thereon is obtained. According to such a sublimation transfer method, since the amount of dye transfer can be controlled by the amount of energy applied to the thermal transfer sheet, density gradation is possible, so that the image is very clear, transparent, and halftone. Therefore, it is possible to form a high-quality printed product comparable to a full-color photographic image.

  Here, in the printing material for sublimation transfer, for example, when continuously printing 100 or more printed materials, the thermal transfer image receiving sheet is peeled off the front and back, the ink ribbon is peeled off, the friction between the printer and the conveying member in the printer system, etc. There has been a problem that the handleability (hereinafter referred to as “separation”) of a printed matter printed due to static electricity generated by the ink deteriorates. For example, in order to solve the problem caused by static electricity charged on the thermal transfer image receiving sheet, it has been proposed to provide a conductive layer on at least one layer between the base sheet and the receiving layer (see Patent Document 1).

  Further, in recent years, a thermal transfer image receiving sheet (hereinafter referred to as “seal”) in which a seal part in which an adhesive layer, a base material layer, and a receiving layer are laminated on a release sheet part is provided so as to be peelable from the release sheet part. A mold thermal transfer image-receiving sheet ”). In such a seal-type thermal transfer image-receiving sheet, after forming a desired image on the receiving layer, the sealing portion is peeled off from the release sheet portion, and the receiving layer on which the image is formed can be used as an arbitrary target via the adhesive layer. Can be attached to objects. Such a seal-type thermal transfer image-receiving sheet has a wider range of usage compared to conventional thermal transfer image-receiving sheets. For example, attention is being paid to use in the amusement field of a photo booth.

  In such a seal-type thermal transfer image-receiving sheet, there is a problem that curling is likely to occur due to a difference in thickness and material of each layer included in the release sheet portion and the seal portion. In order to eliminate such technical problems, in the seal-type thermal transfer image-receiving sheet, the total thickness of the back-side base material layer in the release sheet portion and the front-side base material layer in the seal base material portion is 100 μm or more, The value (A) / (B) obtained by dividing the rigidity (A) in the TD direction of the entire sealing base material part excluding the adhesive layer by the rigidity (B) in the TD direction of the release sheet part is 0.4 or more. 1 or less has been proposed (see Patent Document 2).

JP 2007-26895 A JP2015-39847A

  In recent years, in the amusement field and the like, further improvement in the transparency and stereoscopic effect of the printed matter of the seal-type thermal transfer image receiving sheet has been demanded according to consumer demand. Accordingly, an object of the present invention is to provide a seal-type thermal transfer image-receiving sheet excellent in image expression of a printed matter. Another object of the present invention is to provide a method for producing a print using the seal-type thermal transfer image receiving sheet.

  As a result of intensive studies in order to solve the above problems, the present inventors have found that the above problems can be solved by adopting a specific layer configuration in the seal portion of the sealed thermal transfer image receiving sheet. The present invention has been completed based on such findings.

That is, according to one aspect of the present invention,
A release sheet part, and a seal part including an adhesive layer, a base material layer, a primer layer, and a receiving layer in this order from the release sheet part side, and the seal part can be peeled from the release sheet part A seal-type thermal transfer image receiving sheet provided,
A seal-type thermal transfer image receiving sheet is provided in which the glossiness of the thermal transfer image receiving sheet is 80% or more and the haze value is 10% or less.

  In the aspect of the present invention, the base material layer includes a back side base material layer and a front side base material layer from the pressure-sensitive adhesive layer side, the back side base material layer is a resin layer, and the front side base material layer is non-porous. A resin layer is preferred.

  In the aspect of this invention, it is preferable that the said front side base material layer is a non-porous polyester resin layer.

  In the aspect of the present invention, the front base material layer preferably has a thickness of 10 μm or more and 50 μm or less.

  In the aspect of this invention, it is preferable that the said back side base material layer is a porous polyester resin layer.

  In the aspect of the present invention, the back side base material layer preferably has a thickness of 10 μm or more and 100 μm or less.

  In the aspect of the present invention, it is preferable that an adhesive layer is further provided between the back-side base material layer and the front-side base material layer.

  In the aspect of this invention, it is preferable that the said release sheet part is equipped with the release layer and the sheet | seat base material layer in this order from the said seal part side.

  In the aspect of the present invention, the primer layer is preferably a conductive primer layer.

According to another aspect of the invention,
The thermal transfer image-receiving sheet is superposed on a thermal transfer ink sheet containing a thermal diffusible dye, and the thermal diffusible dye contained in the thermal transfer ink sheet is transferred onto the receiving layer of the seal-type thermal transfer image-receiving sheet. , A method of producing a print by forming an image,
There is provided a method for producing a printed material, wherein the haze value of a seal-type transfer image-receiving sheet after printing is at least 10% greater than the haze value of the seal-type transfer image-receiving sheet before printing.

  According to the present invention, it is possible to provide a sealed thermal transfer image-receiving sheet that is excellent in transparency before printing and excellent in image expression after printing (transparency and stereoscopic effect).

1 is a schematic cross-sectional view showing an embodiment of a seal-type thermal transfer image receiving sheet according to the present invention. 1 is a schematic cross-sectional view showing an embodiment of a seal-type thermal transfer image receiving sheet according to the present invention.

<Seal type thermal transfer image receiving sheet>
The seal-type thermal transfer image-receiving sheet of the present invention includes a release sheet portion, and a seal portion including an adhesive layer, a base material layer, a primer layer, and a receiving layer in this order from the release sheet portion side. The seal portion is provided so as to be peelable.

  The seal-type thermal transfer image-receiving sheet according to the present invention has a glossiness of 80% or more, preferably 85% or more, more preferably 90% or more, and a haze value in each of the MD direction and the TD direction before printing. It is 10% or less, preferably 8% or less, and is excellent in transparency. In addition, glossiness and haze value use a haze meter (made by Toyo Seiki Seisakusho Co., Ltd., model number: micro haze plus 20 °), glossiness is JIS Z 8741: 1997, and haze value is JIS K 7136: 2000. It is a value measured in compliance. The MD direction is a direction parallel to the image receiving paper transport direction at the time of printing in the printer, and the TD direction is a direction perpendicular to the MD direction.

  The layer structure of one embodiment of the seal-type thermal transfer image-receiving sheet of the present invention will be described with reference to the schematic cross-sectional views of FIGS. A seal-type thermal transfer image receiving sheet 10 shown in FIG. 1 includes a release sheet portion 11, and an adhesive layer 12, a base material layer 13, a primer layer 14, and a receiving layer 15 in this order from the release sheet portion 11 side. And a seal portion 16. A seal-type thermal transfer image receiving sheet 20 shown in FIG. 2 includes a release sheet portion 29 including a sheet base layer 21 and a release layer 22, and an adhesive layer 23 from the release layer 22 side of the release sheet portion 29. , A back-side base material layer 24, an adhesive layer 25, a front-side base material layer 26, a conductive primer layer 27, and a seal portion 30 provided with a receiving layer 28 in this order. Hereinafter, each layer constituting the seal-type thermal transfer image receiving sheet of the present invention will be described.

(Release sheet part)
The release sheet portion constituting the seal-type thermal transfer image-receiving sheet of the present invention preferably comprises a release layer and a sheet base material layer from the seal portion side, and the back surface of the sheet base material layer is opposite to the release layer. A layer may further be provided. In addition, when a sheet | seat base material layer is excellent in mold release property, it is not necessary to provide a mold release layer.

(Sheet base material layer)
The material of the sheet base material layer constituting the release sheet portion is not particularly limited, and a conventionally known material can be appropriately selected and used. Examples of the sheet base layer include stretched or unstretched films of plastics such as polyester, polypropylene, polycarbonate, cellulose acetate, polyethylene derivatives, polyamide, polymethylpentene and the like having high heat resistance such as polyethylene terephthalate and polyethylene naphthalate. Examples thereof include paper, coated paper, art paper, cast coated paper, paperboard, emulsion-impregnated paper, synthetic rubber latex-impregnated paper, synthetic resin-added paper, and cellulose fiber paper.

  Moreover, the layer which has a micro void inside can also be used as a sheet | seat base material layer. As an example of the layer having a microvoid inside, a polyolefin resin layer having a microvoid inside can be cited. Examples of the polyolefin resin layer include polyethylene, polypropylene, polybutene, polyisobutene, polyisobutylene, polybutadiene, and polyisoprene.

  As a polyolefin resin layer having microvoids, microvoids (fine vacancies) can be generated inside by the following two methods. One is a method in which inorganic fine particles are kneaded in a polymer, and when the compound is stretched, microvoids are generated using the inorganic fine particles as nuclei. The other is to create a compound blended with an incompatible polymer (one or more types) for the main resin. When this compound is viewed microscopically, the polymers form a fine sea-island structure. When this compound is stretched, microvoids are generated due to separation of the sea-island interface or large deformation of the polymer forming the island.

(Release layer)
The release layer constituting the release sheet portion is provided in order to improve the peelability of the seal portion from the release sheet portion. Examples of the resin forming the release layer include waxes, silicone wax, silicone resin, silicone-modified resin, fluorine resin, fluorine-modified resin, polyvinyl alcohol, acrylic resin, heat-crosslinkable epoxy-amino resin, and heat-crosslinkable alkyd. -Amino resin etc. are mentioned. Further, the release layer may be composed of one kind of resin or may be composed of two or more kinds of resins. The release layer may be formed by using a cross-linking agent such as an isocyanate compound, a catalyst such as a tin-based catalyst, and an aluminum-based catalyst in addition to the releasable resin.

  Although the thickness of a mold release layer is not specifically limited, Preferably it is 0.1 micrometer-5 micrometers, More preferably, it is 0.5 micrometer-3 micrometers. The release layer is formed by dissolving or dispersing the resin in a suitable solvent to prepare a release layer coating solution, and then printing the release layer coating solution on the sheet base layer. It can be formed by applying and drying by a conventionally known means such as a method, a screen printing method or a reverse coating method using a gravure plate.

(Back layer)
Examples of the back layer constituting the release sheet portion include acrylic resins, cellulose resins, polycarbonate resins, polyvinyl acetal resins, polyvinyl alcohol resins, polyvinyl butyral resins, polyamide resins, polystyrene resins, polyester resins, and halogenated resins. Additives such as nylon fillers, acrylic fillers, polyamide fillers, fluorine fillers, polyethylene waxes and amino acid powders, and inorganic fillers such as silicon dioxide and metal oxides as additives in polymers and other resins Additions can be used. Moreover, what hardened | cured these resins with hardening | curing agents, such as an isocyanate compound and a chelate compound, can also be used. Although the thickness of a back surface layer is not specifically limited, Preferably it is 0.1 micrometer-5 micrometers, More preferably, it is 0.5 micrometer-3 micrometers.

(Seal part)
The seal portion constituting the seal-type thermal transfer image-receiving sheet of the present invention comprises at least the pressure-sensitive adhesive layer, the base material layer, the primer layer, and the receiving layer in this order from the release sheet portion side. An adhesive layer may be further provided between the front-side base material layer.

(Adhesive layer)
The pressure-sensitive adhesive layer constituting the seal part is provided in order to improve the peelability of the seal part from the release sheet part. The pressure-sensitive adhesive layer is not particularly limited, and a conventionally known solvent-based or water-based pressure-sensitive 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 include ester copolymers, polyurethane resins, natural rubber, chloroprene rubber, and nitrile rubber.

  Considering the improvement in peelability of the seal part from the release sheet part, the adhesive strength of the pressure-sensitive adhesive layer is the peel strength between the release sheet part and the pressure-sensitive adhesive layer, and in the peeling method by 180 ° in accordance with JIS Z0237, It is desirable to set it in the range of 0.98 to 16.7N, preferably in the range of 4.9 to 13.7N. Therefore, in forming the pressure-sensitive adhesive layer, it is preferable to use the material and the coating amount appropriately selected so that the peel strength is within this range.

  The pressure-sensitive adhesive layer is, for example, a reverse roll using a gravure printing method, a screen printing method, or a gravure plate on the release sheet portion of the pressure-sensitive adhesive layer coating solution obtained by dissolving or dispersing the pressure-sensitive adhesive in an appropriate solvent. It can be formed by applying and drying by a known means such as a coating printing method. Although the thickness of an adhesive layer is not specifically limited, Preferably it is 1 micrometer-15 micrometers, More preferably, it is 3 micrometers-10 micrometers.

(Base material layer)
The base material layer constituting the seal portion serves to prevent loss of heat applied from the thermal head to the receiving layer and to serve as a support for supporting the pressure-sensitive adhesive layer and the receiving layer. The base material layer preferably includes a back side base material layer and a front side base material layer from the pressure-sensitive adhesive layer side, and may further include an adhesive layer between the back side base material layer and the front side base material layer.

  In the present invention, when a back side base material layer and a non-porous front side base material layer are provided in this order from the pressure-sensitive adhesive layer side as the base material layer of the seal-type thermal transfer image receiving sheet, the back side from the release sheet side as the base material layer Compared to a conventional seal-type thermal transfer image-receiving sheet in which a base material layer and a porous front-side base material layer are provided in order, in the state before printing, since the smoothness of the receiving layer surface is excellent, the transparency is relatively high and relatively high Small haze value. On the other hand, in the state after printing, the seal-type thermal transfer image-receiving sheet of the present invention has a relatively high haze value as compared with the conventional seal-type thermal transfer image-receiving sheet, and the printed material is excellent in transparency, depth, and three-dimensional. It has a surprising effect of being excellent in feeling. In the present invention, the above advantageous effect can be further obtained by providing a porous resin layer as the back side base material layer.

(Back side base material layer)
The back-side base material layer is a resin layer and preferably has a heat insulation property that can prevent heat applied during image formation by thermal transfer from being lost due to heat transfer to the base material. The thickness of the back-side base material layer is preferably 10 μm or more and 100 or less, more preferably 20 μm or more and 80 μm or less from the viewpoint of such a function or production process.

  The resin layer is preferably a porous resin layer, and more preferably a porous film having microvoids inside. The porous film is preferably a porous film containing a polyolefin resin such as polypropylene resin or a polyester resin such as polyethylene terephthalate resin as a base resin and having fine voids inside. In particular, it is preferable to use a porous opaque polyester film.

  As a method for producing fine voids in the film, a compound is prepared by kneading organic fine particles or inorganic fine particles (one kind or plural kinds) incompatible with the resin as the base of the film. Microscopically, this compound forms a fine sea-island structure with the base resin and fine particles incompatible with the base resin, and the compound is formed into a film and stretched to form the sea-island interface. The fine voids as described above are generated by the peeling of the film or the large deformation of the region forming the island.

  As a method for forming the fine voids, for example, a method in which polypropylene is mainly used and polyester or acrylic resin having a melting point higher than that of polypropylene is added thereto. In this case, polyester or acrylic resin serves as a nucleating agent that forms fine voids. In any case, the content of the polyester and acrylic resin is preferably 2 or more and 10 parts by mass or less with respect to 100 parts by mass of polypropylene. When the content is 2 parts by mass or more, fine voids can be sufficiently generated, and the printing sensitivity can be further improved. Moreover, when content is 10 mass parts or less, the heat resistance of a porous film can fully be ensured.

  Moreover, when producing the porous film which uses polypropylene as the base resin, it is preferable to further add polyisoprene in order to generate more fine and dense voids. Thereby, higher printing sensitivity can be obtained. For example, a porous film having high printing sensitivity can be obtained by preparing a compound composed mainly of polypropylene, blended with acrylic resin or polyester, and polyisoprene, forming a compound, and stretching.

(Adhesive layer)
The adhesive layer is not particularly limited as long as it has a function of adhering the back side base material layer and the front side base material layer. For example, as an adhesive component used for the adhesive layer, for example, urethane resins, α-olefin-maleic anhydride resins and other polyolefin resins, polyester resins, acrylic resins, epoxy resins, urea resins, melamine resins Examples thereof include resins, phenolic resins, vinyl acetate resins, cyanoacrylate resins, and the like. Among them, a reactive type of acrylic resin, a modified type, etc. can be preferably used. Further, it is preferable to cure the adhesive using a curing agent because the adhesive force is improved and the heat resistance is also increased. As the curing agent, an isocyanate compound is generally used, but aliphatic amines, cycloaliphatic amines, aromatic amines, acid anhydrides and the like can be used.

  The thickness of the adhesive layer is usually about 0.5 μm to 10 μm in a dry state. For the formation of the adhesive layer, generally used coating means can be used, for example, by means of gravure printing, screen printing, reverse roll coating using a gravure plate, etc., It can be obtained by drying. Further, EC sand lamination using polyethylene or the like may be performed.

(Back side base material layer)
The front-side base material layer is a non-porous resin layer, and heat is applied at the time of thermal transfer. Therefore, the front base material layer is preferably a material having a mechanical strength that does not hinder handling even in a heated state. The thickness of the front-side base material layer is preferably 10 μm or more and 50 μm or less, more preferably 20 μm or more and 40 μm or less, from the viewpoint of such a function or production process.

  As the front substrate layer, polyethylene terephthalate, polyethylene naphthalate and other highly heat-resistant polyester, polypropylene, polycarbonate, cellulose acetate, polyethylene derivatives, polyamide, polymethylpentene and other plastic stretched or unstretched films, fine paper, Examples thereof include coated paper, art paper, cast coated paper, and paperboard. In particular, it is preferable to use a non-porous transparent polyester film.

(Primer layer)
The primer layer constituting the seal portion is provided between the base material layer and the receiving layer, and is intended to provide adhesion, antistatic property, anti-curling property, etc. between the base material layer and the receiving layer. It is.

  The binder resin used for the primer layer is polyurethane resin, polyester resin, polycarbonate resin, polyamide resin, acrylic resin, polystyrene resin, polysulfone resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinyl chloride- Examples thereof include vinyl acetate copolymer resin, polyvinyl acetal resin, polyvinyl butyral resin, polyvinyl alcohol resin, epoxy resin, cellulose resin, ethylene-vinyl acetate copolymer resin, polyethylene resin, and polypropylene resin.

  In the present invention, the primer layer is preferably a conductive primer layer. By forming a conductive primer layer as the primer layer, it is possible to improve the spreading of printed matter. It is preferable to add a layered silicate to the conductive primer layer in order to impart conductivity. The layered silicate is a compound obtained by reacting sodium, magnesium, and lithium salts with sodium silicate under appropriate conditions. By containing the layered silicate in the receiving layer, the chargeability of the surface of the thermal transfer image-receiving sheet can be controlled and the spreading property can be improved. The content of the layered silicate in the primer layer is preferably 0.1 to 20% by mass, more preferably 1 to 15% by mass, based on the total solid mass other than the layered silicate in the receiving layer. . In the present invention, a commercially available layered silicate can be used, and for example, Laponite JS, Laponite S (manufactured by Wilber Ellis Co., Ltd.) and the like are preferable.

(Receptive layer)
The receiving layer of the thermal transfer image receiving sheet is for receiving the sublimation dye transferred from the thermal transfer ink sheet and maintaining the formed image. As the resin for forming the receiving layer, polycarbonate resin, polyester resin, polyamide resin, acrylic resin, cellulose resin, polysulfone resin, polyvinyl chloride resin, polyvinyl acetate resin, vinyl chloride-acetic acid Examples include vinyl copolymer resins, polyvinyl acetal resins, polyvinyl butyral resins, polyurethane resins, polystyrene resins, polypropylene resins, polyethylene resins, ethylene-vinyl acetate copolymer resins, and epoxy resins.

  The thermal transfer image receiving sheet can have a release agent in the receiving layer in order to improve the release property from the thermal transfer ink sheet. Various release agents such as solid waxes such as polyethylene wax, amide wax, Teflon (registered trademark), fluorine-based or phosphate-based surfactant, silicone oil, reactive silicone oil, curable silicone oil, etc. Silicone oil and various silicone resins can be mentioned, and silicone oil is preferable. An oily oil can be used as the silicone oil, but a modified silicone oil is preferred. As the modified silicone oil, amino-modified silicone, epoxy-modified silicone, aralkyl-modified silicone, epoxy-aralkyl-modified silicone, alcohol-modified silicone, vinyl-modified silicone, urethane-modified silicone and the like can be preferably used, but epoxy-modified silicone, aralkyl-modified silicone, etc. Epoxy-aralkyl-modified silicones are particularly preferred. It is also preferable to use a combination of two or more of these release agents. The amount of these modified silicone oils added is preferably 0.5% by mass or more and 30% by mass or less of the resin constituting the receiving layer.

  In the formation of the receiving layer, pigments and fillers such as titanium oxide, zinc oxide, kaolin, clay, calcium carbonate, and fine powder silica are used for the purpose of improving the whiteness of the receiving layer and further enhancing the sharpness of the transferred image. Can be added. Moreover, you may add plasticizers, such as a phthalic acid ester compound, a sebacic acid ester compound, and a phosphoric acid ester compound.

  The receiving layer is made of thermoplastic resin and other necessary additives such as mold release agents, plasticizers, fillers, crosslinking agents, curing agents, catalysts, heat release agents, UV absorbers, antioxidants, and light. Formed by applying and drying a coating solution in which a stabilizer or the like is dissolved or dispersed in an organic solvent or water by a forming means such as a gravure printing method, a screen printing method, and a reverse roll coating method using a gravure plate can do. The thickness of the receptor layer is not particularly limited, but is preferably 1 μm to 20 μm, more preferably 2 μm to 10 μm.

<Thermal transfer ink sheet>
The thermal transfer ink sheet used together with the seal-type thermal transfer image receiving sheet of the present invention has a heat transferable color material layer provided on one side of the base sheet, and a heat resistant slipping layer provided on the other side of the base sheet. It is preferable to have a layer structure. Hereinafter, each layer constituting the thermal transfer ink sheet will be described.

(Substrate sheet)
As the material of the base sheet constituting the thermal transfer ink sheet, conventionally known materials can be used, and even other materials can be used as long as they have a certain degree of heat resistance and strength. be able to. For example, polyethylene terephthalate, polyester, polypropylene, polycarbonate, polyethylene, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyimide, nylon, cellulose acetate, ionomer and other resin films, condenser paper, paraffin paper, and other non-woven fabrics Etc. These may be used alone, or a laminate in which these are arbitrarily combined may be used. Among these, polyethylene terephthalate which is a versatile plastic that can be thinned and is inexpensive is preferable.

  The thickness of the base sheet can be appropriately selected according to the material so that the strength, heat resistance and the like are appropriate, but usually it is preferably about 0.5 μm to 50 μm, more preferably 1 μm to 20 μm. More preferably, it is 1 μm or more and 10 μm or less.

  The base sheet may be subjected to a surface treatment in order to improve adhesion 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, and grafting treatment are applied. can do. Only one type of the surface treatment may be applied, or two or more types may be applied.

  Furthermore, it is also possible to apply and form an adhesive layer on the base sheet as an adhesive treatment of the base sheet. An adhesion layer can be formed from the following organic materials and inorganic materials, for example. Examples of the organic material include polyester resins, polyacrylate resins, polyvinyl acetate resins, polyurethane resins, styrene acrylate resins, polyacrylamide resins, polyamide resins, polyether resins, polystyrene resins, Examples thereof include polyethylene resins, polypropylene resins, polyvinyl chloride resins, polyvinyl alcohol resins, polyvinyl pyrrolidone and vinyl resins such as modified products thereof, and polyvinyl acetal resins such as polyvinyl acetoacetal and polyvinyl butyral. Examples of the inorganic material include silica (colloidal silica), alumina or alumina hydrate (alumina sol, colloidal alumina, cationic aluminum oxide or hydrate, suspicion bakumaite, etc.), aluminum silicate, magnesium silicate, magnesium carbonate, oxidation Examples thereof include ultrafine particles of colloidal inorganic pigments such as magnesium and titanium oxide.

  Moreover, when manufacturing a plastic film by extending | stretching as said surface treatment, a primer liquid can be apply | coated to an unstretched film and it can also carry out by extending | stretching after that (primer process).

(Heat transferable color material layer)
The thermal transfer ink sheet is provided with a thermal transfer color material layer on one surface of a base sheet. When the thermal transfer ink sheet is a sublimation type thermal transfer ink sheet, a layer containing a sublimation dye is formed as the thermal transferable color material layer, and when the thermal transfer type thermal transfer ink sheet is a hot melt composition containing a colorant A layer containing a heat-meltable ink is formed. A layer region containing a sublimable dye and a layer region containing a heat-meltable ink composed of a heat-melting composition containing a colorant are provided in a surface sequence on a continuous base sheet. Also good.

  As the material of the heat transferable color material layer, conventionally known dyes can be used, but those having good characteristics as a printing material, for example, having a sufficient coloring density and changing color due to light, heat, temperature, etc. Preferred are diarylmethane dyes, triarylmethane dyes, thiazole dyes, merocyanine dyes, pyrazolone dyes, methine dyes, indoaniline dyes, acetophenone azomethine, pyrazoloazomethine, imidazolazomethine, imidazoazomethine, pyridone Azomethine dyes such as azomethine, xanthene dyes, oxazine dyes, cyanostyrene dyes such as dicyanostyrene and tricyanostyrene, thiazine dyes, azine dyes, acridine dyes, benzeneazo dyes, pyridoneazo, thiophenazo, iso Thiazoleazo, pyro Azo dyes such as ruazo, pyrazole azo, imidazole azo, thiadiazole azo, triazole azo, and disazo, spiropyran dyes, indolinospiropyran dyes, fluorane dyes, rhodamine lactam dyes, naphthoquinone dyes, anthraquinone dyes, quinophthalone dyes And dyes. Specifically, red dyes such as Disperse Red 60, Disperse Violet 26, CeresRed 7B, Samaron Red F3BS, yellow dyes such as Disperse Yellow 231, PTY-52, Macrolex Yellow 6G, Solvent Blue 63, Waxolin Blue AP-FW, Holon Brilliant Blue S-R, MS Blue 100, C.I. I. And blue dyes such as Solvent Blue 22. In addition, the dye contained in the ribbon used by the sublimation type thermal transfer system marketed can also be used.

  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, and cellulose acetate resin, polyvinyl alcohol resin, polyvinyl acetate resin, and polyvinyl butyral resin. And vinyl resins such as polyvinyl acetal resin and polyvinyl pyrrolidone, acrylic resins such as poly (meth) acrylate and poly (meth) acrylamide, polyurethane resins, polyamide resins, and polyester 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.

  Examples of the method for forming the heat transferable color material layer include the following methods. For the heat-transferable colorant layer obtained by adding additives such as a release agent to the dye and binder resin as necessary, dissolving in an appropriate organic solvent such as toluene and methyl ethyl ketone, or dispersing in water. A coating solution (dissolved solution or dispersion) is applied to one surface of a substrate sheet by, for example, a gravure printing method, a reverse roll coating method using a gravure plate, a roll coater, a bar coater, etc., and dried. Can be formed. The heat transferable color material layer has a thickness of about 0.2 μm or more and 5.0 μm or less, and the content of the sublimable dye in the heat transferable color material layer is 5 mass% or more and 90 mass% or less, preferably 5 It is preferable that they are mass% or more and 70 mass% or less.

(Protective layer)
The thermal transfer ink sheet may be provided with a protective layer in the surface order on the same side as the thermal transferable color material layer. After the color material is transferred to the thermal transfer image-receiving sheet, the protective layer is transferred to cover the image, whereby the image can be protected from light, gas, liquid, abrasion and the like. Other layers such as an adhesive layer, a release layer, or an undercoat layer may be provided as a protective layer.

(Heat resistant slipping layer)
The heat resistant slipping layer is mainly composed of a heat resistant resin. The heat resistant resin is not particularly limited. For example, polyvinyl butyral resin, polyvinyl acetoacetal resin, polyester resin, vinyl chloride-vinyl acetate copolymer resin, polyether resin, polybutadiene resin, styrene-butadiene copolymer resin, Acrylic polyol, polyurethane acrylate, polyester acrylate, polyether acrylate, epoxy acrylate, urethane or epoxy prepolymer, nitrocellulose resin, cellulose nitrate resin, cellulose acetate propionate resin, cellulose acetate butyrate resin, cellulose acetate-hydrodiene Phthalate resin, cellulose acetate resin, aromatic polyamide resin, polyimide resin, polyamideimide resin, polycarbonate resin, Fine chlorinated polyolefin resins.

  The heat resistant slipping layer may be formed by blending additives such as a slipperiness imparting agent, a crosslinking agent, a release agent, an organic powder, and an inorganic powder in addition to the above heat resistant resin.

  In general, the heat-resistant slipping layer is prepared by adding the above-mentioned heat-resistant resin and the above-mentioned slipperiness-imparting agent and additives that are optionally added to the solvent, and dissolving or dispersing each component to form a heat-resistant slipping layer coating solution. After the preparation, the heat resistant slipping layer coating solution can be applied on a substrate and dried. As the solvent in the heat resistant slipping layer coating solution, the same solvents as those in the dye ink can be used.

Examples of the coating method of the heat resistant slipping layer coating liquid include wire bar coating, gravure printing, screen printing, reverse roll coating using a gravure plate, and gravure coating is particularly preferable. The heat resistant slipping layer coating solution may be applied so that the dry coating amount is preferably 0.1 g / m ² or more and 3 g / m ² or less, more preferably 1.5 g / m ² or less.

<Method for producing printed matter>
In the method for producing a printed matter using the thermal transfer image-receiving sheet of the present invention, the seal-type thermal transfer image-receiving sheet and the thermal transfer ink sheet containing a thermal diffusible dye are superposed and heated in accordance with a recording signal. An image can be formed by transferring the heat diffusible dye contained in the thermal transfer ink sheet onto the receiving layer of the seal-type thermal transfer image receiving sheet to produce a printed matter. In the present invention, by using the above-mentioned seal-type thermal transfer image-receiving sheet, the haze value of the seal-type thermal transfer image-receiving sheet after printing is at least 10% or more, preferably 12 compared with the seal-type thermal transfer image-receiving sheet before printing. %, More preferably 15% or more. As a result, it is possible to produce a printed material excellent in image expression (transparency and stereoscopic effect).

  As a thermal transfer recording apparatus that can be used in such an image forming method, a known apparatus can be used and is not particularly limited. In the present invention, a commercially available thermal transfer recording apparatus can be used, and examples thereof include a sublimation thermal transfer printer (manufactured by ALTECH ADS (model: MEGAPICEL III), manufactured by DNP Photo Lucio (model: DS40)).

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to the following examples.

[Example 1]
Polyethylene terephthalate film (thickness 75 μm, manufactured by Toyobo Co., Ltd., trade name: Crisper film) having microvoids as the back side substrate layer, and non-porous polyethylene terephthalate film (thickness 25 μm, Toray Industries, Inc.) Manufactured and trade name: Lumirror) were laminated using dry lamination. Subsequently, a primer layer coating liquid 1 having the following composition was applied on the front side base material layer so as to have a thickness of 1.0 μm when dried, thereby forming a conductive primer layer. Next, on the primer layer, a receiving layer coating solution having the following composition was applied to a thickness of 4.0 μm when dried to form a receiving layer, and the back side substrate layer / adhesive layer / A laminate A in which the front side base material layer / primer layer / receptive layer was laminated in this order was obtained.

  In addition, a release layer coating liquid having the following composition is applied to one side of a coated paper (thickness: 80 μm) as a sheet base layer so as to have a thickness of 0.3 μm when dried. did. Subsequently, a pressure-sensitive adhesive layer coating solution having the following composition is applied on the release layer so as to have a thickness of 10.0 μm when dried, thereby forming a pressure-sensitive adhesive layer. A laminate B in which the release layer / adhesive layer was laminated in this order was obtained. Subsequently, the back side base material layer of the laminated body A and the adhesive layer of the laminated body B are bonded together, so that the sheet base material layer / release layer / adhesive layer / back side base material layer / adhesive layer / front side base material are laminated. A sealed thermal transfer image-receiving sheet was obtained in which layers / primer layers / receiving layers were laminated in this order.

(Primer layer coating solution 1)
-Conductive synthetic layered silicate (Laponite JS, Wilber Ellis Co., Ltd. 10 parts by mass)-Polyester resin (Polyester WR905, Nippon Synthetic Chemical Co., Ltd.) 10 parts by mass-Water 80 parts by mass

(Coating fluid for receiving layer)
・ Vinyl chloride-vinyl acetate copolymer (# 1000A Denki Kagaku Kogyo Co., Ltd.) 12 parts by mass Epoxy-modified silicone (X-22-3000T Shin-Etsu Chemical Co., Ltd.)
0.8 part by mass amino-modified silicone (X-22-1660B-3 Shin-Etsu Chemical Co., Ltd.)
0.24 parts by mass, toluene 30 parts by mass, methyl ethyl ketone 30 parts by mass

(Release layer coating solution)
・ Addition polymerization agent silicone (KS847H Shin-Etsu Chemical Co., Ltd. 100 parts by mass) Toluene 200 parts by mass

(Coating liquid for adhesive layer)
-Acrylic copolymer (SK Dyne 1310L, Soken Chemical Co., Ltd.) 48 parts by mass-Epoxy resin (Hardener E-AX, Soken Chemical Co., Ltd.) 0.36 parts by mass-Ethyl acetate 51.64 parts by mass

[Example 2]
A sealed thermal transfer image-receiving sheet was prepared in the same manner as in Example 1 except that a non-porous polyethylene terephthalate film (thickness 38 μm, manufactured by Toray Industries, Inc., trade name: Lumirror) was used as the front substrate layer.

[Example 3]
A sealed thermal transfer image-receiving sheet was produced in the same manner as in Example 1 except that a non-porous polyethylene terephthalate film (thickness 75 μm, manufactured by Toray Industries, Inc., trade name: Lumirror) was used as the back-side base material layer.

[Comparative Example 1]
Polyethylene terephthalate film (thickness 75 μm, Toyobo Co., Ltd.) having a non-porous polyethylene terephthalate film (thickness 25 μm, manufactured by Toray Industries, Inc., trade name: Lumirror) as the back side base material layer and having microvoids as the front side base material layer Manufactured under the trade name: Crisper Film), and the primer layer coating solution 1 was changed to the primer layer coating solution 2 described below, to produce a sealed thermal transfer image-receiving sheet in the same manner as in Example 1. did.

(Primer layer coating solution 2)
-14 parts by mass of urethane resin-28 parts by mass of titanium oxide-13 parts by mass of toluene-34 parts by mass of methyl ethyl ketone-11 parts by mass of isopropyl alcohol

[Comparative Example 2]
Polyethylene terephthalate film (thickness 75 μm, Toyobo Co., Ltd.) having a non-porous polyethylene terephthalate film (thickness 25 μm, manufactured by Toray Industries, Inc., trade name: Lumirror) as the back side base material layer and having microvoids as the front side base material layer A seal-type thermal transfer image-receiving sheet was produced in the same manner as in Example 1 except that the product name was “Crisper Film”.

[Comparative Example 3]
A seal-type thermal transfer image-receiving sheet was produced in the same manner as in Example 1 except that the primer layer coating solution 1 was changed to the primer layer coating solution 2 described above.

[Comparative Example 4]
Polyethylene terephthalate film (thickness 30 μm, Toyobo Co., Ltd.) using a non-porous polyethylene terephthalate film (thickness 75 μm, manufactured by Toray Industries, Inc., trade name: Lumirror) as the back side base material layer and having microvoids as the front side base material layer A seal-type thermal transfer image-receiving sheet was produced in the same manner as in Example 1 except that the product name was “Crisper Film”.

[Evaluation of seal-type thermal transfer image-receiving sheet]
The seal-type thermal transfer image-receiving sheets prepared in the above Examples and Comparative Examples were subjected to (1) measurement of glossiness / haze value, (2) evaluation of image expression of printed matter, and (3) evaluation of dispersibility. .

(1) Measurement of glossiness and haze value Using the above-prepared seal-type thermal transfer image-receiving sheet and a printer (CP 9650 series), a printed matter was produced with 128 gradations. About the seal-type thermal transfer image-receiving sheet before printing and after printing, using a haze meter (manufactured by Toyo Seiki Seisakusho, model number: micro haze plus 20 °), the glossiness is JIS Z 8741: 1997, and the haze value is JIS. The glossiness and haze value were measured in the MD direction and the TD direction, respectively, under the conditions based on K7136: 2000.

(2) Evaluation of image expression of printed material Visual evaluation was performed on the printed material prepared in the above (1) based on the following evaluation criteria.
[Evaluation criteria]
(Double-circle): The image of the printed matter was excellent in transparency, deep, and very excellent in stereoscopic effect.
○: The image of the printed material was excellent in transparency, deep, and excellent in stereoscopic effect.
X: It was not able to arrange, and the judgment property was unsatisfactory.

(3) Evaluation of dispersibility Using the seal-type thermal transfer image-receiving sheet produced as described above, 100 natural images were printed with a sublimation transfer printing system “Print Center (DNP Photo Lucio Co., Ltd.)”. Sensory evaluation was conducted on the ease of alignment.
[Evaluation criteria]
○: Can be easily aligned, and has good judgment.
(Triangle | delta): It can arrange, and the judgment property was normal.
X: It was not able to arrange, and the judgment property was unsatisfactory.

  The results of the above evaluations are shown in Table 1. The seal-type thermal transfer image-receiving sheet of the example satisfying the layer structure of the present invention has a relatively low haze value and excellent transparency in the state before printing, compared with the seal-type thermal transfer image-receiving sheet of the comparative example. In the state, it was found that the printed material was excellent in transparency and three-dimensionality, and also in excellent separation.

10, 20 Seal-type thermal transfer image-receiving sheet 11, 29 Release sheet part 12, 23 Adhesive layer 13 Base layer 14 Primer layer 15, 28 Receiving layer 16, 30 Seal part 21 Sheet base layer 22 Release layer 24 Back side base Material layer
25 Adhesive layer 26 Front side base material layer 27 Conductive primer layer

Claims (10)

A release sheet part, and a seal part including an adhesive layer, a base material layer, a primer layer, and a receiving layer in this order from the release sheet part side, and the seal part can be peeled from the release sheet part A seal-type thermal transfer image receiving sheet provided,
A seal-type thermal transfer image-receiving sheet, wherein the thermal transfer image-receiving sheet has a glossiness of 80% or more and a haze value of 10% or less.   The base material layer includes a back side base material layer and a front side base material layer from the pressure-sensitive adhesive layer side, the back side base material layer is a resin layer, and the front side base material layer is a non-porous resin layer. 2. The seal-type thermal transfer image receiving sheet according to 1.   The sealed thermal transfer image-receiving sheet according to claim 2, wherein the front-side base material layer is a non-porous polyester resin layer.   The seal-type thermal transfer image-receiving sheet according to claim 2 or 3, wherein the front-side base material layer has a thickness of 10 µm to 50 µm.   The sealed thermal transfer image-receiving sheet according to any one of claims 2 to 4, wherein the back-side base material layer is a porous polyester resin layer.   The seal-type thermal transfer image receiving sheet according to any one of claims 2 to 5, wherein the back-side base material layer has a thickness of 10 µm or more and 100 µm or less.   The sealed thermal transfer image-receiving sheet according to any one of claims 2 to 6, further comprising an adhesive layer between the back-side base material layer and the front-side base material layer.   The seal-type thermal transfer image-receiving sheet according to any one of claims 1 to 7, wherein the release sheet portion includes a release layer and a sheet base material layer in this order from the seal portion side.   The sealed thermal transfer image-receiving sheet according to any one of claims 1 to 8, wherein the primer layer is a conductive primer layer. The seal-type thermal transfer image-receiving sheet according to any one of claims 1 to 9 and a thermal transfer ink sheet containing a thermal diffusible dye are overlapped to form the thermal diffusible dye contained in the thermal transfer ink sheet, A method for producing a printed matter by forming an image by transferring onto a receiving layer of a seal-type thermal transfer image-receiving sheet,
A method for producing a printed matter, wherein the haze value of a seal-type transfer image-receiving sheet after printing is at least 10% greater than the haze value of the seal-type transfer image-receiving sheet before printing.

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