JP2018171767A - Transfer sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer sheet that has easy usability which eliminates the need for a transfer device equipped with a heating device and a heating process during transfer, and also has wettability and excellent recoating property such as adhesion against a top coating layer.SOLUTION: A transfer sheet 1 has a releasable support body 10, a release layer 20, a printing layer 30, and an adhesive layer 40 laminated in this order, the release layer 20 containing acrylic polyol resin and urethan resin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transfer sheet that imparts design properties to the surface of a substrate.

  Conventionally, as a means of surface decoration for buildings, furniture, joinery, construction materials, etc., transfer sheets on which various designs are printed are transferred to a base material such as a metal plate or a wooden board as a transfer target. It has been broken. For example, a metallic decorative material having the same design as that of natural wood can be obtained by transferring a transfer sheet on which a pattern having the same grain as that of natural wood is printed onto a metal plate. In particular, when the application is door materials, window frames, window glass, cocoons, deck furniture and other outdoor furniture, outdoor advertising boards, various exterior materials such as vehicle exteriors, the transfer sheet has excellent weather resistance. It is desirable. In order to improve the weather resistance of the transfer sheet, a resin having a specification mainly composed of vinyl chloride-vinyl acetate copolymer resin, acrylic resin, or a mixed resin of both is proposed as the resin for the release layer and the adhesive layer. (For example, refer to Patent Document 1).

JP-A-7-205597

A conventional transfer sheet using a heat-sensitive adhesive layer requires heating for transfer to a base material, and depending on the size of the base material and the transfer device, there is a problem that workability deteriorates. . In addition, since a conventional transfer sheet often uses a release layer as the outermost layer as a protective layer, when it is desired to further provide protection performance, or to improve various physical properties such as surface wear resistance and contamination resistance. In some cases, the top coat layer cannot be properly overcoated.
Therefore, a transfer sheet excellent in workability and recoatability is desired.

  The object of the present invention is to provide a transfer apparatus provided with a heating apparatus at the time of transfer and a simple workability that does not require a heating step, and wettability to the top coat layer (no liquid is emitted during coating), adhesion, etc. It is to provide a transfer sheet excellent in recoatability.

The present invention solves the above problems by the following means.
(1) A releasable support, a release layer, a printing layer, and an adhesive layer are laminated in this order, and the release layer contains an acrylic polyol resin and a urethane resin.

  (2) The transfer sheet according to (1), wherein the release layer has a content ratio of the acrylic polyol resin and the urethane resin in a range of 9: 1 to 6: 4 by mass ratio. Sheet.

  (3) The transfer sheet according to (1) or (2), wherein the release layer contains an isocyanate.

  According to the present invention, there is provided a transfer sheet that has a simple workability that eliminates the need for a transfer apparatus and a heating process provided with a heating apparatus at the time of transfer, and is excellent in recoatability such as wettability and adhesion to the topcoat layer. Can be provided.

It is sectional drawing of the transfer sheet 1 of embodiment. It is sectional drawing explaining the manufacturing method of the decorative material. It is sectional drawing explaining the manufacturing method of the decorative material.

Embodiments of the present invention will be described below with reference to the drawings. In addition, each figure shown below including FIG. 1 is the figure shown typically, and the magnitude | size and shape of each part are exaggerated suitably for easy understanding.
Numerical values such as dimensions and material names of each member described in the present specification are examples of the embodiment, and are not limited thereto, and may be appropriately selected and used.

FIG. 1 is a cross-sectional view of the transfer sheet 1 of the present embodiment. The transfer sheet 1 can be stored or conveyed in the form shown in FIG.
As shown in FIG. 1, the transfer sheet 1 includes a base film 10 as a release support, a release layer 20, a print layer 30, an adhesive layer 40, and a release film 50.

  The transfer sheet 1 in the present embodiment employs a flexible and thin film form as a release support having release properties with respect to the transfer layer below the release layer (hereinafter also referred to as a base film). Called). On this base film 10, a transfer layer comprising a release layer 20, a printing layer 30 and an adhesive layer 40, and a release film 50 having releasability from the adhesive layer 40 are laminated in this order. The “lamination in this order” in the present invention means not only direct lamination but also indirect lamination. For example, there is another layer between the base film 10 and the release layer 20. Is also acceptable.

<Base film 10>
The base film (releasable support) 10 is a film that supports the printing layer 30. The base film 10 has releasability with respect to a transfer layer composed of a release layer or the like, and is released from the interface with the release layer 20 after the transfer sheet 1 is transferred to the base 60 (described later). . Examples of the base film 10 include polyester resins such as polyethylene terephthalate, polyethylene aphthalate, and polybutylene terephthalate, polyolefin resins such as polypropylene and polyethylene, cellulose resins such as polycarbonate resin, polystyrene resin, and triacetyl cellulose (TAC). Examples thereof include a film made of a resin or the like. Among these, a biaxially stretched polyethylene terephthalate (PET) film is preferable in terms of excellent strength and flexibility. In addition, the conventionally well-known release layer may be formed in the surface at the side of the peeling layer 20 in the base film 10, and the release process may be performed.
The film thickness of the base film 10 is preferably 10 μm or more and 200 μm or less, and more preferably 20 μm or more and 60 μm or less.

<Peeling layer 20>
The release layer 20 is a layer that is laminated to facilitate peeling of the base film 10 from the transfer sheet 1. The release layer 20 remains as the outermost layer of the transfer sheet 1 after the transfer sheet 1 is transferred to the base 60 and the base film 10 is peeled off. A top coat layer 70 (described later) is formed on the surface of the release layer 20.

The release layer 20 contains an acrylic polyol resin and a urethane resin.
The acrylic polyol resin has recoatability with a polyol while having protection performance by an acrylic skeleton used also in a conventional transfer sheet. Further, the urethane resin contributes to ensuring adhesion with other layers.

  The acrylic polyol resin is not particularly limited as long as it is an acrylic resin having a plurality of hydroxyl groups. For example, methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate-n-propyl, (meth) One kind of (meth) acrylic acid alkyl ester monomer such as isopropyl acrylate, (n-butyl) (meth) acrylate, isobutyl (meth) acrylate, octyl (meth) acrylate, ethylhexyl (meth) acrylate Or two or more types, and (meth) acrylic acid-2-hydroxyethyl, (meth) acrylic acid-2-hydroxypropyl, (meth) acrylic acid-2-hydroxy-3-phenoxypropyl, etc. have a hydroxyl group in the molecule One or more of (meth) acrylic acid ester monomers and, if necessary, a styrene monomer and the like A copolymer obtained by copolymerizing, and the like having a plurality of hydroxyl groups.

  The weight average molecular weight of the resin forming the release layer 20 is not particularly limited, but is preferably 2,000 or more, more preferably about 2,000 to 100,000, and still more preferably about 2,000 to 50,000. It is done. When the weight average molecular weight of the resin forming the release layer 20 is less than 2,000, the release layer 20 is dissolved when a topcoat layer 70 (described later) for surface protection or the like is formed on the release layer 20. As a result, problems such as whitening may occur. When the weight average separation amount of the resin forming the release layer 20 exceeds 100,000, the viscosity of the release layer composition may become too high, resulting in poor printing. In addition, in this invention, the weight average molecular weight of resin which forms the peeling layer 20 is the value measured by the gel permeation chromatography method (GPC) using polystyrene as a standard substance.

  The glass transition temperature (Tg) of the acrylic polyol resin is not particularly limited, but is preferably 55 ° C. or higher, more preferably about 55 to 140 ° C., and still more preferably from the viewpoint of further improving the chemical resistance and moldability of the transfer sheet 1. Is about 65 to 120 ° C, particularly preferably about 80 to 100 ° C. When the Tg of the acrylic polyol resin is less than 55 ° C., the release layer 20 becomes soft and has adhesiveness. Therefore, when the transfer sheet 1 is manufactured by roll-to-roll, for example, the printing layer 30 (described later), etc. After the release layer 20 is formed by printing on the sheet, it becomes easy to be damaged when it comes into contact with the guide roll. On the other hand, if the Tg of the acrylic polyol resin is 140 ° C. or less, the heat applied in the production process of the transfer sheet 1 (drying process after laminating the release layer 20, drying process when laminating the printing layer 30). Since the resin of the release layer 20 is sufficiently softened, for example, the adhesion with the printing layer 30 is improved.

Specific examples of the acrylic polyol resin include, for example, acrylic polyol # 6000 manufactured by Taisei Fine Chemical Co., Ltd.
The acrylic polyol resin preferably has a hydroxyl value of 30 to 130 mgKOH / g, more preferably 50 to 130 mgKOH / g, and still more preferably 60 to 120 mgKOH / g. By setting the hydroxyl value of the acrylic polyol resin to 30 mgKOH / g or more, excellent recoatability can be expressed. Further, by setting the hydroxyl value to 130 mgKOH / g or less, it is possible to ensure the flexibility of the release layer and make it difficult to crack during transfer. The hydroxyl value can be measured by an acetylation method using acetic anhydride.

Examples of the urethane resin include polyols such as acrylic polyol, polyester polyol, and polyether polyol, aromatic isocyanates such as tolylene diisocyanate, xylene diisocyanate, and diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, and hydrogenated tolylene diisocyanate. Examples thereof include urethane resins obtained by reacting isocyanates such as aliphatic or alicyclic isocyanates. In order to avoid reaction with other isocyanates, a lower hydroxyl value is preferred.
The urethane resin has a weight average molecular weight of usually about 10,000 to 100,000 and a glass transition temperature (Tg) of usually about −50 to 0 ° C.

The mixing ratio of the acrylic polyol resin and the urethane resin in the release layer 20 is preferably in the range of 9: 1 to 6: 4 by mass ratio. More preferably, it is 9: 1 to 8: 2. If the ratio of the acrylic polyol resin is too large, the adhesion between the layers with the printing layer 30 may be lowered, which is not preferable. On the other hand, if the ratio of the urethane resin is too large, the protection performance deteriorates, which is not preferable. As an ink composition comprising the acrylic polyol resin and urethane resin as described above, for example, trade name “KSI” (by mass ratio, acrylic polyol resin: urethane resin = 9: manufactured by Showa Ink Industries, Ltd.) 1) can be exemplified.
The release layer 20 can be formed by diluting with a solvent or the like and then applying and drying by a conventionally known application method. The layer thickness (dry) of the release layer 20 is preferably about 1 μm or more and 2 μm or less.

  Note that a small amount of isocyanate may be further added to the resin composition constituting the release layer 20 for adjusting the peel strength. By adding isocyanate to the resin composition, the acrylic polyol is urethanized, so that the adhesiveness of the release layer 20 is increased. Although the compounding quantity of isocyanate is related also with the peeling strength between the base film 10 and the peeling layer 20 mentioned later, 3 to 20 mass parts in conversion of solid content with respect to 100 mass parts of solid content of acrylic polyol resin. The following is preferable. If the amount of isocyanate is less than 3 parts by mass, the substrate film 10 may be peeled off from the release layer 20 when the release film 50 is peeled off from the transfer sheet 1, which is not preferable. On the other hand, when the compounding amount of isocyanate is more than 20 parts by mass, the base film is separated from the release layer 20 when the base film 10 is released from the transfer sheet 1 after the transfer sheet 1 is bonded to the base 60. 10 may not be released, which is not preferable.

  In this embodiment, the peel strength between the base film 10 and the release layer 20 (for example, measured under conditions of 180 ° peel and a peel rate of 300 mm / min, JIS Z0237 compliant) is described below. It is set to be at least twice the peel strength between the layers 40. This is to prevent the base film 10 from being peeled from the release layer 20 when the release film 50 is peeled from the transfer sheet 1. However, the present invention is not limited to this, and the peeling strength may be reversed so that the peeling layer 20 remains on the base film 10 side when the peeling film 50 is peeled from the transfer sheet 1.

In addition, for example, a light stabilizer may be added to these resin compositions as a weathering agent for suppressing deterioration due to ultraviolet rays.
As the light stabilizer, an ultraviolet absorber or a radical scavenger is used. Moreover, you may use both together or in mixture as a light stabilizer.

  Examples of the ultraviolet absorber include 2- (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2′-hydroxy-3 ′,-tert- Butyl 5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-amylu-5'-isobutylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy- 2'- such as 3'-isobutylphenyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-isobutylphenyl-5'-propylphenyl) -5-chlorobenzotriazole Hydroxyphenyl-5-, chlorobenzotriazole ultraviolet absorbers, 2- (2'-hydroxy-3 ', 5'-di-tert-buty Phenyl) benzotriazole, 2′-hydroxyphenylbenzotriazole-based UV absorbers such as 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2,2′-dihydroxy-4-methoxybenzophenone, 2, 2,2'-dihydroxybenzophenone UV absorbers such as 2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2-dihydroxy-4-methoxybenzophenone, 2-hydroxybenzophenone ultraviolet absorbers such as 2,4-dihydroxybenzophenone, salicylic acid ester ultraviolet absorbers such as phenyl salicylate, or inorganic compounds such as zinc oxide and iron oxide having a particle size of 1 μm or less. Can be mentioned.

Examples of the radical scavenger include 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 1,2,2,6,6-pentamethyl-4-piperidinyl (meth) acrylate, bis (2,2 , 6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1-octyloxy-2,2,6,6-tetramethyl) -4-piperidinyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, 2,4 -Bis [N-butyl-N- (1-cyclohexyloxy-2,2,6,6-tetramethyl-4-piperidinyl) amino] -6- (2-hydroxyethyl Amine) -1,3,5-triazine), tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, bis- (1,2 , 2,6,6-pentamethyl-4-piperidyl) -2- (3,5-di-t-butyl-4-hydroxy-benzyl) -2-n-butyl malonate. Among these, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1-octyloxy-2) , 2,6,6-tetramethyl-4-piperidinyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl (1,2,2,6,6-pentamethyl- And hindered amine light stabilizers derived from decanedioic acid (sebacic acid) such as 4-piperidinyl) sebacate.
Furthermore, in order to improve the weather resistance (particularly light resistance), in addition to the above-mentioned ultraviolet absorber and the like, a hindered amine light stabilizer is used as a radical scavenger in an amount of 0.3 to 2% by weight, more preferably 0.8%. It is good to add 3-0.5 mass%.

<Print layer 30>
The printed layer 30 is a printed design layer on which the design (design) of the transfer sheet 1 is formed. Examples of the resin constituting the printing layer 30 include acrylic resin, vinyl chloride (vinyl chloride-vinyl acetate copolymer) resin, acrylic-vinyl acetate resin, and the like. In addition, a coloring pigment, a coloring dye, and the like are added to the printing layer 30. The layer thickness (dry) of the printing layer 30 is about 5 μm.

  Although not shown, a print coat layer may be laminated on the pressure-sensitive adhesive layer 40 side of the print layer 30. The print coat layer functions as a concealing layer for making it difficult to see the surface (base) of the substrate 60 when the transfer film 1 is transferred to the substrate 60. The print coat layer is formed so as to cover the entire surface of the print layer 30 and is colored, for example, white, gray, brown or the like.

  Although not shown, a clear resin layer may be laminated between the printing layer 30 and the pressure-sensitive adhesive layer 40. The clear resin layer functions as a crack suppression layer that suppresses occurrence of cracks in the printed layer 30. Examples of the resin constituting the clear resin layer include acrylic-vinyl acetate resin (vinyl chloride-vinyl acetate copolymer) resin, vinyl acetate resin, and the like.

The material that can be used as the clear resin layer preferably has a glass transition temperature (Tg) of normal temperature or higher. The glass transition temperature of the clear resin layer is preferably lower than the glass transition temperature of the printing layer 30 and higher than the glass transition temperature of the bonding layer, and is preferably approximately between the two. When the deformation changes in the viscoelasticity of each layer, it is easy to absorb the stress due to the deformation if this relationship exists. If the glass transition temperature of the clear resin layer is lower than normal temperature, the clear resin layer itself is deformed due to a change in temperature, and the deformation acts as a stress on the print layer 30 and may cause a crack in the print layer 30. Because there is.
The layer thickness (dry) of the clear resin layer is preferably 1 μm or more.

<Adhesive layer 40>
The pressure-sensitive adhesive layer 40 is a layer that joins the transfer sheet 1 and the substrate 60 when the transfer sheet 1 is transferred to the substrate 60. The pressure-sensitive adhesive layer 40 of the present embodiment is made of a cured product of the pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition contains an acrylic pressure-sensitive adhesive as a main agent and an isocyanate-based curing agent.
The thickness of the pressure-sensitive adhesive layer 40 is preferably 10 μm or more and 50 μm or less, and more preferably 15 μm or more and 30 μm or less.

[Acrylic adhesive]
A preferable acrylic pressure-sensitive adhesive includes, for example, an acrylate copolymer obtained by copolymerizing an acrylate ester with another monomer. Examples of the acrylate ester include ethyl acrylate, acrylate-n-butyl, acrylate-2-ethylhexyl, isooctyl acrylate, isononyl acrylate, hydroxylethyl acrylate, propylene glycol acrylate, acrylamide, glycidyl acrylate, and the like. Is mentioned. These can be used alone or in combination of two or more.

Other monomers include, for example, methyl acrylate, methyl methacrylate, styrene, acrylonitrile, vinyl acetate, acrylic acid, methacrylic acid, itaconic acid, hydroxylethyl acrylate, hydroxylethyl methacrylate, propylene glycol acrylate, acrylamide Methacrylamide, glycidyl acrylate, glycidyl methacrylate, dimethylaminoethyl methacrylate, tert-butylaminoethyl methacrylate, and n-ethylhexyl methacrylate. These can be used alone or in combination of two or more.
In addition, as a commercial item of the said acrylic adhesive, Nisset (made by Nippon Carbide), SK dyne (made by Soken Chemical Co., Ltd.) etc. can be used suitably, for example.

[Isocyanate curing agent]
The pressure-sensitive adhesive composition contains an isocyanate curing agent. The isocyanate curing agent is added in order to obtain adhesiveness when transferring the transfer sheet 1 to a substrate 60 (described later). Since the acrylic pressure-sensitive adhesive has a hydroxyl group, by using an isocyanate-based curing agent, partial crosslinking can be further improved. When the pressure-sensitive adhesive layer 40 is formed, there is no internal destruction and an appropriate storage elastic modulus is obtained. can get.

  Examples of the isocyanate curing agent include a polyisocyanate compound, a trimer of a polyisocyanate compound, a urethane prepolymer having a terminal isocyanate group obtained by reacting a polyisocyanate compound and a polyol compound, and 3 of this urethane prepolymer. Examples include a polymer.

Examples of the polyisocyanate compound include 2,4-tolylene diisocyanate, 2,5-tolylene diisocyanate, 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate, diphenylmethane-4,4′-diisocyanate, 3 -Methyldiphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, dicyclohexylmethane-2,4'-diisocyanate, lysine isocyanate and the like.
The content of the isocyanate curing agent in the pressure-sensitive adhesive layer 40 is set according to the gel fraction.

<Peeling film 50>
The release film 50 is a film that is peeled from the transfer sheet 1 when the transfer sheet 1 is transferred to the substrate 60. Examples of the release film 50 include silicon release type polyethylene terephthalate (PET), untreated polyethylene terephthalate, and polypropylene.
The thickness of the release film 50 is preferably 10 μm or more and 100 μm or less, and more preferably 20 μm or more and 60 μm or less.

(Method for manufacturing cosmetic material 100)
Next, a method for manufacturing the decorative material 100 will be described.
2 and 3 are cross-sectional views illustrating a method for manufacturing the decorative material 100, respectively.

  First, as shown in FIG. 2A, the release film 50 is peeled from the transfer sheet 1. By peeling the release film 50 from the transfer sheet 1, the surface (adhesive surface) of the pressure-sensitive adhesive layer 40 opposite to the printed layer 30 is exposed. As described above, in this embodiment, the peel strength between the base film 10 and the release layer 20 is at least twice the peel strength between the release film 50 and the pressure-sensitive adhesive layer 40. Therefore, when the release film 50 is peeled from the transfer sheet 1, the base film 10 is not peeled from the release layer 20.

  Next, as shown in FIG. 2B, the transfer sheet 1 from which the release film 50 has been peeled is transferred (attached) to the base material 60. The transfer of the transfer sheet 1 to the base material 60 can be continuously performed, for example, in the form of a roll-to-roll, a roll-to-sheet, or the like. Here, “roll-to-roll” means that the belt-like transfer sheet 1 is pulled out from a roll (winding) and supplied to a flat plate-like transfer body (substrate body 61), and the transfer layer is placed on the transfer body. This is a processing mode in which the belt-like releasable support (base film 10) after releasing the transfer layer is again wound on a roll. “Roll-to-sheet” refers to a belt-like transfer sheet 1 that is drawn before and after being transferred from a roll (winding) to a flat plate-like transfer material and the transfer layer is transferred onto the transfer material. This is a processing mode in which the sheet 1 is cut into approximately the size of one sheet to be transferred to form a single sheet, and the sheet releasable support after the transfer layer is released is removed (discarded) one by one. . Alternatively, the transfer sheet 1 may be manually transferred to the substrate 60 and then pressed with a spatula or the like so as to be in close contact with the surface of the substrate 60. The transfer sheet 1 of this embodiment can be transferred to the substrate 60 at room temperature.

The substrate 60 includes a substrate main body 61 and a sealer layer 62.
The base body 61 is a transfer target body onto which the transfer sheet 1 is transferred. Examples of the base body 61 include plates and walls made of materials such as inorganic materials, wood, and resins. Among these, examples of the inorganic material include stone, concrete, glass, and metal. Moreover, the base material body 61 may be a ceramic (such as ceramics) made of an inorganic material.
The sealer layer 62 is an undercoat layer for smoothening the surface of the base body 61 and improving the adhesion between the base body 61 and the transfer sheet 1. The sealer layer 62 is omitted when the surface (transfer surface) of the base body 61 has sufficient smoothness.

  Next, as shown in FIG. 3C, the base film 10 is peeled from the transfer sheet 1 transferred to the base 60. By peeling the base film 10 from the transfer sheet 1, the surface of the release layer 20 opposite to the printed layer 30 is exposed. In FIG. 3C, since the adhesive layer 40 and the substrate 60 of the transfer sheet 1 are bonded with a strong adhesive force, the transfer sheet 1 is removed when the substrate film 10 is peeled from the transfer sheet 1. There is no peeling from the substrate 60.

Next, as shown in FIG. 3D, a top coat layer 70 is formed on the exposed surface of the release layer 20. The top coat layer 70 is a layer for imparting color, gloss, etc. to the surface of the decorative material 100 as a finishing agent. Further, by forming the top coat layer 70, the decorative material 100 can be provided with weather resistance and stain resistance. Examples of the top coat layer 70 include an acrylic resin, a silicon-based resin, a fluororesin, and a urethane resin.
The thickness of the top coat layer 70 is not particularly limited, but is preferably 5 μm or more and 1000 μm or less, more preferably 10 μm or more and 300 μm or less.
By passing through the above process, the decorative material 100 by which the transfer sheet 1 was transcribe | transferred to the base material 60 can be obtained.

Next, an Example and a comparative example are shown and this invention is demonstrated further in detail. However, the present invention is not limited to the following examples.
An ink composition comprising a PET film having a thickness of 26 μm (“Diafoil” manufactured by Mitsubishi Plastics Co., Ltd.) as the base film 10 and containing an acrylic polyol resin and a urethane resin in a mass ratio of 9: 1 on one surface thereof. (“KSI” manufactured by Showa Ink Industries, Ltd.) was applied to form a release layer 20 having a film thickness (dry) of 1 μm. On this release layer 20, printing is performed a plurality of times using a gravure ink ("EIS" manufactured by Showa Ink Industries, Ltd.) composed of an acrylic-vinyl chloride resin composition and a color pigment, and printing as shown in FIG. Layer 30 was formed.

In addition, as a release film 50, a 25 μm-thick PET separator (“Tokuro release film” manufactured by Toyo Cloth Co., Ltd.) is prepared, and an adhesive made of an acrylic ester resin (“Nissetsu” manufactured by Nippon Carbide Industries, Ltd.) The pressure-sensitive adhesive layer 40 as shown in FIG. 2 was formed by coating the agent layer so as to have a film thickness (dry) of 20 μm and drying.
And after bonding together the printing layer 30 by the side of the base film 10 and the adhesive layer 40 by the side of the peeling film 50 (PET separator), it heat-cures at 40 degreeC for 3 days, By Example 1 A transfer sheet was obtained.

<Comparative example>
A transfer sheet of a comparative example was obtained under the same conditions as in the above example except that the resin constituting the release layer 20 was an acrylic resin composition (“46-7” manufactured by Showa Ink Industries, Ltd.).

  The above-mentioned two types of transfer sheets were each transferred onto an aluminum plate (base material) having a thickness of 1 mm at room temperature to obtain decorative materials as samples. And the recoat property of the surface of each decorative material was evaluated. As an evaluation of the recoating property, a 31 dyn (dyne number: wetting index) wetting reagent was applied to the surface of the sample, and it was judged by whether or not separation occurred in the liquid film after 2 seconds. Here, since the dyne number of the organic solvent (xylene, toluene, ethyl acetate, methyl ethyl ketone, isopropyl alcohol, etc.) of the main paint assumed as the top coat layer 70 is 30 dyn or less, the dyne number of the wetting reagent is 31 dyn. . If the dyne number of wetness reagents can be applied, the surface of the sample has a wetness index of 31 dyn or more, and it can be determined that the surface has recoating properties that allow most paints assumed as the topcoat layer 70 to be applied.

  As a result of the above test, it was observed that in the comparative example in which the resin constituting the release layer 20 was composed of an acrylic resin composition, separation occurred in the liquid film after 2 seconds had passed since the wetting reagent was applied. . On the other hand, in the example in which the resin constituting the release layer 20 is composed of a resin composition containing an acrylic polyol resin and a urethane resin, separation occurs in the liquid film after 2 seconds have passed since the wetting reagent was applied. Not confirmed.

  From the above results, it was confirmed that the decorative material having the transfer sheet of the example was excellent in the recoatability of the release layer 20 as the outermost layer. In addition, since the transfer sheet of the example can be transferred to the base material at room temperature (non-heated), a transfer device equipped with a heating device and a heating process are not required at the time of transfer like a transfer sheet that requires heating for transfer. . Therefore, the transfer sheet of the example is excellent in workability.

  The transfer sheet according to the present invention can impart excellent designability and weather resistance to the transfer target (base material). These decorative materials include building wall materials (exterior materials, interior materials), partitions, doors, window frames, furniture, interior decorations, etc., as well as indoor cover materials for automobiles, railway vehicles, ships, aircraft, etc. It can also be applied to panel materials for signs and outdoor advertisements.

DESCRIPTION OF SYMBOLS 1 Transfer sheet 10 Base film 20 Peeling layer 30 Print layer 40 Adhesive layer 50 Peeling film 60 Base material 70 Topcoat layer

Claims (3)

A releasable support, a release layer, a printing layer, and an adhesive layer are laminated in this order,
The release layer is a transfer sheet containing an acrylic polyol resin and a urethane resin. The transfer sheet according to claim 1,
The release layer is a transfer sheet in which the content ratio of the acrylic polyol resin and the urethane resin is within a range of 9: 1 to 6: 4 by mass ratio. The transfer sheet according to claim 1 or 2,
The release layer is a transfer sheet containing isocyanate.

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