JP6880938B2 - Transfer sheet - Google Patents

Description

The present invention relates to a transfer sheet that imparts design to the surface of a base material.

Conventionally, as a means of surface makeup for buildings, furniture, fittings, building members, etc., a transfer sheet on which various patterns are printed has been transferred to a base material such as a metal plate or a wooden plate to be transferred. It has been done. For example, by transferring a transfer sheet on which a pattern having the same wood grain as natural wood is printed to a metal plate, a metal decorative material having the same design as natural wood can be obtained. In particular, when the application is for door materials, window frames, window glass, outdoor furniture such as deck chairs, outdoor advertising boards, and various exterior materials installed outdoors such as vehicle exteriors, the transfer sheet has excellent weather resistance. Is desirable. In order to improve the weather resistance of the transfer sheet, as the resin of the release layer and the adhesive layer, a resin having specifications mainly composed of a vinyl chloride-vinyl acetate copolymer resin, an acrylic resin, or a mixed resin of both has been proposed. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 7-205597

In the conventional transfer sheet, the one using the heat-sensitive adhesive layer requires heating for transfer to the base material, and there is a problem that workability deteriorates depending on the size of the base material and the transfer device. .. Further, since the conventional transfer sheet often uses the release layer which is the outermost layer as a protective layer, it is desired to further impart protective performance or improve various physical properties such as abrasion resistance and stain resistance of the surface. In some cases, the paint to be the top coat layer could not be properly overcoated.
Therefore, there is a demand for a transfer sheet having excellent workability and recoatability.

An object of the present invention is to have a simple workability that eliminates the need for a transfer placement and a heating step provided with a heating placement during transfer, and to have wettability with respect to the topcoat layer (no liquid is generated during coating), adhesion, and the like. It is an object of the present invention to provide a transfer sheet having excellent recoatability.

The present invention solves the above problems by the following solutions.
(1) A transfer sheet in which 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) In the transfer sheet according to (1), the release layer is a transfer in which the content ratio of the acrylic polyol resin and the urethane resin is in the range of 9: 1 to 6: 4 in terms of mass ratio. Sheet.

(3) The transfer sheet according to (1) or (2), wherein the release layer is a transfer sheet containing isocyanate.

According to the present invention, a transfer sheet having a simple workability that does not require a transfer placement and a heating step provided with a heating placement at the time of transfer, and excellent recoatability such as wettability and adhesion to the top coat 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 100. It is sectional drawing explaining the manufacturing method of the decorative material 100.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that each of the figures shown below, including FIG. 1, is a diagram schematically shown, and the size and shape of each part are exaggerated as appropriate for easy understanding.
Numerical values such as dimensions of each member and material names described in the present specification are examples of embodiments, 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 transported in the form shown in FIG.
As shown in FIG. 1, the transfer sheet 1 includes a base film 10, a release layer 20, a printing layer 30, an adhesive layer 40, and a release film 50 as a release support.

The transfer sheet 1 in the present embodiment adopts the form of a flexible and thin film as a release support having releasability with respect to the transfer layer below the release layer (hereinafter, this is also referred to as a base film). Call). On the base film 10, a transfer layer composed of a release layer 20, a printing layer 30, and a pressure-sensitive adhesive layer 40, and a release film 50 having releasability with respect to the pressure-sensitive adhesive layer 40 are laminated in this order. In the present invention, "laminating in this order" 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 an acceptable meaning.

<Base film 10>
The base film (release support) 10 is a film that supports the printing layer 30. The base film 10 has a mold releasability with respect to a transfer layer composed of a release layer or the like, and after the transfer sheet 1 is transferred to the base material 60 (described later), the base film 10 is released from the interface with the release layer 20. .. The base film 10 includes, for example, polyester resins such as polyethylene terephthalate, polyethylene aphthalate, and polybutylene terephthalate, polyolefin resins such as polypropylene and polyethylene, polycarbonate resins, polystyrene resins, and cellulose-based films such as triacetyl cellulose (TAC). Examples thereof include a film made of resin or the like. Of these, a biaxially stretched polyethylene terephthalate (PET) film is preferable because it is excellent in strength and flexibility. A conventionally known release layer may be formed on the surface of the base film 10 on the release layer 20 side, or a release treatment may be applied.
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.

<Release layer 20>
The release layer 20 is a layer laminated to facilitate the release 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 material 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 a recoating property due to the polyol while having a protective performance by an acrylic skeleton that is also used in a conventional transfer sheet. Further, the urethane resin contributes to ensuring the 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, and for example, methyl (meth) acrylic acid, ethyl (meth) acrylic acid, -n-propyl (meth) acrylic acid, (meth). One of (meth) acrylic acid alkyl ester monomers such as isopropyl acrylate, -n-butyl (meth) acrylate, isobutyl (meth) acrylate, octyl (meth) acrylate, and ethylhexyl (meth) acrylate. Alternatively, it has two or more types and a hydroxyl group in a molecule such as -2-hydroxyethyl (meth) acrylate, -2-hydroxypropyl (meth) acrylate, and -2-hydroxy-3-phenoxypropyl (meth) acrylate. Examples of copolymers obtained by copolymerizing one or more (meth) acrylic acid ester monomers with a styrene monomer or the like, if necessary, having a plurality of hydroxyl groups. Be done.

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 further preferably about 2,000 to 50,000. Be 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 the top coat 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. If the weight average separation amount of the resin forming the release layer 20 exceeds 100,000, the viscosity of the release layer composition becomes too high, which may cause printing defects. In the present invention, the weight average molecular weight of the resin forming the release layer 20 is a value measured by gel permeation chromatography (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., 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) or the like. After the release layer 20 is formed on the top by printing, it is easily scratched when it comes into contact with the guide roll. On the other hand, when the Tg of the acrylic polyol resin is 140 ° C. or lower, the heat applied in the manufacturing process of the transfer sheet 1 (the drying step after laminating the release layer 20 and the drying step when the printing layer 30 is laminated) Since the resin of the release layer 20 is sufficiently softened, for example, the adhesion to the printing layer 30 is improved.

Specific examples of the acrylic polyol resin include acrylic polyol # 6000 manufactured by Taisei Fine Chemicals 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 even 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 exhibited. Further, by setting the hydroxyl value to 130 mgKOH / g or less, the flexibility of the release layer can be ensured and it can be made 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 polyols, polyester polyols and polyether polyols, aromatic isocyanates such as tolylene diisocyanate, xylene diisocyanate and diphenylmethane diisocyanate, isophorone diisocyanates, hexamethylene diisocyanates and hydrogenated tolylene diisocyanates. Examples thereof include urethane resins obtained by reacting with isocyanates such as aliphatic or alicyclic isocyanates. It is preferable that the hydroxyl value is low in order to avoid reaction with other isocyanates.
The urethane resin usually has a weight average molecular weight of about 10,000 to 100,000 and a glass transition temperature (Tg) of about −50 to 0 ° C.

The blending 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 in terms of 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 decrease, which is not preferable. Further, if the ratio of the urethane resin is too large, the protection performance is lowered, which is not preferable. Examples of the ink composition containing the acrylic polyol resin and the urethane resin as described above include the trade name "KSI" (mass ratio, acrylic polyol resin: urethane resin = 9:) manufactured by Showa Ink Industry Co., Ltd. 1) can be exemplified.
The release layer 20 can be formed by diluting it with a solvent or the like and then applying and drying it by a conventionally known coating method. The layer thickness (dry) of the release layer 20 is preferably about 1 μm or more and 2 μm or less.

A small amount of isocyanate may be further added to the resin composition constituting the release layer 20 for adjusting the release strength. By adding isocyanate to the above resin composition, the acrylic polyol is made into urethane, so that the adhesiveness of the release layer 20 is enhanced. The blending amount of isocyanate is related to the peel strength between the base film 10 and the release layer 20, which will be described later, but is 3 parts by mass or more and 20 parts by mass in terms of solid content with respect to 100 parts by mass of the solid content of the acrylic polyol resin. The following is preferable. If the blending amount of isocyanate is less than 3 parts by mass, the base film 10 may be peeled from the release layer 20 when the release film 50 is peeled from the transfer sheet 1, which is not preferable. On the other hand, when the blending amount of isocyanate is more than 20 parts by mass, when the base film 10 is released from the transfer sheet 1 after the transfer sheet 1 is attached to the base material 60, the base film is released from the release layer 20. 10 may not be released from the mold, which is not preferable.

In the present embodiment, the peel strength between the base film 10 and the peeling layer 20 (for example, measured under the condition of 180 ° peeling and a peeling speed of 300 mm / min) is determined by the peeling film 50 and the pressure-sensitive adhesive described later. It is set to be at least twice or more the peel strength with and from the layer 40. This is to prevent the base film 10 from peeling 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.

Further, for example, a light stabilizer may be added to these resin compositions as a weather resistant 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 mixed 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-chlorobenzophenone, 2- (2'-hydroxy-3'-tert-amilu-5'-isobutylphenyl) -5-chlorobenzophenone, 2- (2'-hydroxy- 2'-such as 3'-isobutylphenyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-isobutylphenyl-5'-propylphenyl) -5-chlorobenzotriazole, etc. Hydroxyphenyl-5-, chlorobenzotriazole-based UV absorbers, 2- (2'-hydroxy-3', 5'-di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-5'- 2'-Hydroxyphenylbenzotriazole-based ultraviolet absorbers such as methylphenyl) benzotriazole, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2 2,2'-dihydroxybenzophenone-based ultraviolet absorbers such as ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxybenzophenone-based ultraviolet absorbers such as 2-dihydroxy-4-methoxybenzophenone and 2,4-dihydroxybenzophenone. Examples thereof include salicylic acid ester-based ultraviolet absorbers such as phenylsalicylate, and inorganic compounds such as zinc oxide and iron oxide having a particle size of 1 μm or less.

Examples of the radical trapping agent include 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 1,2,2,6,6-pentamethyl-4-piperidinyl (meth) acrylate and bis (2,2). , 6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1-octyl oshiki-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-hydroxyethylamine) -1,3,5-triazine) , Tetrax (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butantetracarboxylate, bis- (1,2,2,6,6-pentamethyl-4-) Piperidine) -2- (3,5-di-t-butyl-4-hydroxy-benzyl) -2-n-butylmalonate and the like can be mentioned. Among these, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1-octyl oshiki-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-) Examples thereof include hindered amine-based photostabilizers derived from decanedic acid (sebacic acid) such as 4-piperidinyl) sebacate.
Further, in order to improve the weather resistance (particularly the light resistance), in addition to the above-mentioned ultraviolet absorber and the like, a hindered amine-based light stabilizer is added as a radical scavenger in an amount of 0.3 to 2% by mass, more preferably 0. It is advisable to add 3 to 0.5% by mass.

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

Further, 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 obscuring the surface (base) of the base material 60 when the transfer material 1 is transferred to the base material 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.

Further, 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 suppressing layer that suppresses the occurrence of cracks in the printing 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 room temperature or higher. Further, it is preferable that the glass transition temperature of the clear resin layer is lower than the glass transition temperature of the printing layer 30 and higher than the glass transition temperature of the bonding layer, and is substantially between the two. When the viscoelasticity of each layer changes and deforms, it is easy to absorb the stress due to the deformation if there is this relationship. If the glass transition temperature of the clear resin layer is lower than room temperature, the clear resin layer itself may be deformed due to changes in temperature, and the deformation may act as stress on the print layer 30 to cause cracks 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 base material 60 when the transfer sheet 1 is transferred to the base material 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 ingredient and an isocyanate-based curing agent.
The layer 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]
Preferred acrylic pressure-sensitive adhesives include, for example, an acrylic acid ester copolymer obtained by copolymerizing an acrylic acid ester with another monomer. Examples of the acrylate ester include ethyl acrylate, -n-butyl acrylate, -2-ethylhexyl acrylate, isooctyl acrylate, isononyl acrylate, hydroxylethyl acrylate, propylene glycol acrylate, acrylamide, glycidyl acrylate and the like. Can be 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. , Methacrylic acid, glycidyl acrylate, glycidyl methacrylate, dimethylaminoethyl methacrylate, -tert-butylaminoethyl methacrylate, -n-ethylhexyl methacrylate and the like. These can be used alone or in combination of two or more.
As commercially available products of the acrylic pressure-sensitive adhesive, for example, Nisetsu (manufactured by Nippon Carbide Co., Ltd.), SK Dyne (manufactured by Soken Chemical Co., Ltd.) and the like can be preferably used.

[Isocyanate-based curing agent]
The pressure-sensitive adhesive composition contains an isocyanate-based curing agent. The isocyanate-based curing agent is added to obtain adhesiveness when the transfer sheet 1 is transferred to the base material 60 (described later). Since the acrylic pressure-sensitive adhesive has a hydroxyl group, partial cross-linking can be further improved by using an isocyanate-based curing agent, and 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-based curing agent include a polyisocyanate compound, a trimer of a polyisocyanate compound, a urethane prepolymer having an isocyanate group at the end obtained by reacting the polyisocyanate compound with a polyol compound, and the urethane prepolymer. Quantitative substances and the like can be mentioned.

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, and 3 -Methyldiphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, dicyclohexylmethane-2,4'-diisocyanate, lysine isocyanate and the like can be mentioned.
The content of the isocyanate-based curing agent in the pressure-sensitive adhesive layer 40 is set according to the gel fraction.

<Release film 50>
The release film 50 is a film that is released from the transfer sheet 1 when the transfer sheet 1 is transferred to the base material 60. Examples of the release film 50 include silicon release type polyethylene terephthalate (PET), untreated polyethylene terephthalate, polypropylene and the like.
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.

(Manufacturing method of decorative material 100)
Next, a method for producing the decorative material 100 will be described.
2 and 3 are cross-sectional views illustrating a method for producing 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 print layer 30 is exposed. As described above, in the present embodiment, the peel strength between the base film 10 and the release layer 20 is at least twice or more 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 off is transferred (attached) to the base material 60. The transfer of the transfer sheet 1 to the base material 60 can be continuously performed in the form of, for example, roll-to-roll, roll-to-sheet, or the like. Here, "roll-to-roll" means that the strip-shaped transfer sheet 1 is pulled out from the roll (winding) and supplied to the flat plate-shaped transfer target (base material main body 61), and the transfer layer is placed on the transfer target. This refers to a processing mode in which the band-shaped releasable support (base film 10) after the transfer layer is released from the mold is wound back on a roll after being transferred to. Further, the "roll to sheet" means that the strip-shaped transfer sheet 1 is pulled out from the roll (winding) and supplied to the flat plate-shaped transfer target, and is transferred before and after the transfer layer is transferred onto the transfer target. A processing form in which the sheet 1 is cut to a size equivalent to one sheet to be transferred to form a single sheet, and the releasable support of the single leaf after the transfer layer is released is removed (discarded) one by one. .. Alternatively, the transfer sheet 1 may be manually transferred to the base material 60 and then pressed with a spatula or the like to uniformly adhere to the surface of the base material 60. The transfer sheet 1 of the present embodiment can be transferred to the base material 60 at room temperature.

The base material 60 includes a base material body 61 and a sealer layer 62.
The base material body 61 is a transfer body to which the transfer sheet 1 is transferred. Examples of the base material body 61 include boards and walls made of materials such as inorganic materials, wood, and resins. Among these, examples of the inorganic material include stone, concrete, glass, metal and the like. Further, the base material main body 61 may be a fired product (ceramic fired product) such as earthenware made of an inorganic material.
The sealer layer 62 is an undercoat layer for smoothing the surface of the base material body 61 and improving the adhesion between the base material body 61 and the transfer sheet 1. If the surface of the base material body 61 (the surface to be transferred) is sufficiently smooth, the sealer layer 62 is omitted.

Next, as shown in FIG. 3C, the base film 10 is peeled off from the transfer sheet 1 transferred to the base material 60. By peeling the base film 10 from the transfer sheet 1, the surface of the peeling layer 20 opposite to the printing layer 30 is exposed. In FIG. 3C, the pressure-sensitive adhesive layer 40 of the transfer sheet 1 and the base material 60 are bonded with a strong adhesive force, so that when the base material film 10 is peeled off from the transfer sheet 1, the transfer sheet 1 is released. It does not peel off from the base material 60.

Next, as shown in FIG. 3D, the 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, luster, etc. to the surface of the decorative material 100 as a finishing agent. Further, by forming the top coat layer 70, it is possible to impart weather resistance and stain resistance to the decorative material 100. Examples of the top coat layer 70 include acrylic resin, silicon-based resin, fluororesin, urethane resin and the like.
The thickness of the top coat layer 70 is not particularly limited, but is preferably 5 μm or more and 1000 μm or less, and more preferably 10 μm or more and 300 μm or less.
By going through the above steps, the decorative material 100 on which the transfer sheet 1 is transferred to the base material 60 can be obtained.

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.
As the base film 10, a 26 μm-thick PET film (“Diafoil” manufactured by Mitsubishi Resin Co., Ltd.) is prepared, and an ink composition containing an acrylic polyol resin and a urethane resin on one surface at a mass ratio of 9: 1. ("KSI" manufactured by Showa Ink Industry Co., Ltd.) was applied to form a release layer 20 having a film thickness (dry) of 1 μm. A gravure ink (“EIS” manufactured by Showa Ink Industry Co., Ltd.) composed of an acrylic-salt vinegar resin composition and a coloring pigment was printed a plurality of times on the peeling layer 20, and the printing as shown in FIG. 1 was performed. Layer 30 was formed.

Further, as the 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 acid ester resin (“Nisetsu” manufactured by Nippon Carbide Industries Co., Ltd.) is provided on the PET separator. The agent layer was coated to a thickness (dry) of 20 μm and dried to form the pressure-sensitive adhesive layer 40 as shown in FIG.
Then, after the printing layer 30 on the base film 10 side and the pressure-sensitive adhesive layer 40 on the release film 50 (PET separator) side are bonded together, they are heated and cured at 40 ° C. for 3 days. A transfer sheet was obtained.

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

The above two types of transfer sheets were each transferred onto a 1 mm thick aluminum plate (base material) at room temperature to obtain a decorative material as a sample. Then, the recoatability of the surface of each decorative material was evaluated. As an evaluation of the recoatability, a wetting reagent of 31 dyn (dyne number: wetting index) was applied to the surface of the sample, and it was judged by whether or not the liquid film was separated after 2 seconds had passed. Here, since the number of dyne 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 set to 31 dyn. .. If the wetting reagent having this number of dyne can be applied, it can be determined that the surface of the sample has a wetting index of 31 dyn or more and has a recoating property to which most of the paint assumed as the top coat layer 70 can be applied.

As a result of the above test, in the comparative example in which the resin constituting the release layer 20 was composed of the acrylic resin composition, it was observed that the liquid film was separated 2 seconds after the wet reagent was applied. .. On the other hand, in the example in which the resin constituting the release layer 20 was composed of a resin composition containing an acrylic polyol resin and a urethane resin, separation occurred in the liquid film 2 seconds after the wet reagent was applied. It was confirmed that it was not.

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 which is the outermost layer. Further, since the transfer sheet of the example can be transferred to the base material at room temperature (non-heating), a transfer device equipped with a heating device and a heating step are not required at the time of transfer, unlike the transfer sheet that requires heating for transfer. .. Therefore, the transfer sheet of the example is also excellent in workability.

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

1 Transfer sheet 10 Base film 20 Peeling layer 30 Printing layer 40 Adhesive layer 50 Peeling film 60 Base material 70 Top coat layer

Claims (2)

The releasable support, the release layer, the print layer, and the adhesive layer are laminated in this order.
The release layer contains an acrylic polyol resin and a urethane resin .
The acrylic polyol resin is a transfer sheet having a hydroxyl value of 30 to 130 mgKOH / g. 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 in the range of 9: 1 to 6: 4 in terms of mass ratio.

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