JP7047304B2 - Manufacturing method of transfer sheet and decorative material - Google Patents

Description

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

Conventionally, as a means of surface decoration of buildings, furniture, fittings, building members, etc., a transfer sheet on which various patterns are printed is transferred to a transfer base material such as stone, wood, concrete, metal, etc., which is a transfer body. Is being done. For example, by transferring a transfer sheet on which a pattern having the same wood grain as that of natural wood is printed to a substrate to be transferred, a decorative material having the same design as that of natural wood can be obtained.

In particular, when the application is for door materials, window frames, window glass, drainboards, 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, a resin having a specification mainly composed of an acrylic resin has been proposed as the resin of the release layer (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 transfer substrate, and the workability deteriorates depending on the size of the transfer substrate and the transfer device. There was a challenge.
Further, in the transfer layer after being transferred to the substrate to be transferred, the release layer which is the outermost layer is often used as a protective layer, but when further protective performance is desired, or the surface is wear-resistant, stain-resistant, etc. When it is desired to improve various physical properties of the above, a top coat layer is formed on the surface of the release layer. Therefore, it is required to further improve the recoatability of the paint as the top coat layer.

An object of the present invention is to provide a transfer sheet having excellent workability at the time of transfer and recoatability of a top coat layer , and a method for producing a decorative material using the transfer sheet .

The present invention solves the above-mentioned problems by the following solution means. In addition, in order to facilitate understanding, the description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto. Further, the configurations described with reference numerals may be appropriately improved, or at least a part thereof may be replaced with other configurations.

In the first invention, the releasable support (10), the release layer (20), the decorative layer (30), and the pressure-sensitive adhesive layer (40) are laminated in this order, and the releasable support is described. Contains a polyester resin, the peeling layer contains a vinyl chloride-vinyl acetate copolymer and a polyester resin, and the peeling layer is based on 100 parts by mass of the vinyl chloride-vinyl acetate copolymer. The transfer sheet (1) is a mixture of 0.2 to 0.4 parts by mass of the polyester resin contained in the release layer .

The second invention is the method for producing a decorative material using the transfer sheet of the first invention, which is a step of transferring the surface of the pressure-sensitive adhesive layer of the transfer sheet to a transfer substrate and a transfer to the transfer substrate. A method for producing a decorative material, comprising a step of peeling the releasable support from the transferred sheet and a step of forming a top coat layer on the surface of the peeling layer of the transfer sheet.

According to the present invention, it is possible to provide a transfer sheet having excellent workability at the time of transfer and recoatability of the top coat layer.

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. In addition, each figure 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 and material names of each member described in the present specification are examples of embodiments, and the present invention is not limited to these, 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 release support 10, a release layer 20, a decorative layer 30, an adhesive layer 40, and a release film 50.

As the transfer sheet 1 in the present embodiment, a flexible and thin film is adopted as the releasable support 10 having releasability with respect to the transfer layer described later. On the releasable support 10, a transfer layer (laminated body) composed of a release layer 20, a decorative 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 obtained. They are stacked in order. In the present invention, "stacking in this order" means not only direct stacking but also indirect stacking. For example, another layer is formed between the release support 10 and the release layer 20. It is a meaning to allow even if there is.

<Releasable support 10>
The releasable support 10 is a film that supports the decorative layer 30. The releasable support 10 has releasability with respect to the transfer layer including the release layer and the like, and after the transfer sheet 1 is transferred to the transfer base material 60 (described later), from the interface with the release layer 20. It is released. Examples of the releasable support 10 include polyester resins such as polyethylene terephthalate, polyethylene aphthalate, and polybutylene terephthalate, polyolefin resins such as polypropylene and polyethylene, polycarbonate resins, polystyrene resins, and triacetyl cellulose (TAC). Examples thereof include a film made of a polyethylene 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 release support 10 on the release layer 20 side, or a release treatment may be applied.
The film thickness of the releasable support 10 is preferably 10 μm or more and 100 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 releasable support 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 substrate 60 to be transferred and the releasable support 10 is peeled off. For example, a top coat layer 70 (described later) is formed on the surface of the release layer 20.

The release layer 20 contains a vinyl chloride-vinyl acetate copolymer and a polyester resin.
The vinyl chloride-vinyl acetate copolymer is not particularly limited as long as it is solvent (re) soluble.

The polyester resin is not particularly limited, and examples thereof include polyester resins containing at least a structural unit obtained by polycondensing an alcohol component and a carboxylic acid component. Further, in addition to the polyester-based resin, a polyester-based resin modified to such an extent that its characteristics are not substantially impaired is included.

Examples of the modified polyester resin include a urethane-modified polyester resin in which the polyester resin is modified by a urethane bond, an epoxy-modified polyester resin in which the polyester resin is modified by an epoxy bond, and a polyester resin segment (A). And a composite resin (HB) containing a vinyl-based resin segment (B) and the like can be mentioned. As a commercially available polyester resin, for example, the Byron series (manufactured by Toyobo Co., Ltd.) and the like can be preferably used.

The blending ratio of the vinyl chloride-vinyl acetate copolymer and the polyester resin in the release layer 20 is 0.2 to 0.4 parts by mass of the polyester resin mixed with 100 parts by mass of the vinyl chloride-vinyl acetate copolymer. It is preferable to let it.
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 peeling layer 20 is preferably about 1 μm or more and 2 μm or less.

In the present embodiment, due to the polyester resin mixed with the vinyl chloride-vinyl acetate copolymer, the peel strength between the releasable support 10 and the release layer 20 is determined by the release film 50 and the pressure-sensitive adhesive layer 40, which will be described later. It becomes larger than the peel strength between and. As a result, when the release film 50 is peeled off from the transfer sheet 1, the transfer layer that should remain on the releasable support 10 shifts to the release film 50 side, a phenomenon called "breaking up" (hereinafter, "defective"). It can also suppress "peeling").

Further, for example, a light stabilizer may be added to the resin composition constituting the release layer 20 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. Further, as the light stabilizer, both may be used in combination or in combination.

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-amilu-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, etc. Hydroxyphenyl-5, chlorobenzotriazole UV absorbers, 2- (2'-hydroxy-3', 5'-di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-5'- Methylphenyl) 2'-hydroxyphenylbenzotriazole-based ultraviolet absorbers such as 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, 2,4-dihydroxybenzophenone, etc. 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) , Tetrakiss (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, bis- (1,2,2,6,6-pentamethyl-4-) Piperidil) -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 decanedioic 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 weight, more preferably 0. It is recommended to add 3 to 0.5% by mass.

<Decorative layer 30>
The decorative layer 30 is a design layer on which the design of the transfer sheet 1 is formed. Examples of the resin constituting the decorative layer 30 include an acrylic resin, a vinyl chloride-vinyl acetate copolymer resin, and an acrylic- (vinyl chloride-vinyl acetate copolymer) resin. Further, a coloring pigment, a coloring dye, or the like is added to the decorative layer 30. The layer thickness (dry) of the decorative 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 decorative layer 30. The print coat layer functions as a concealing layer for obscuring the surface (base) of the transfer base 60 when the transfer sheet 1 is transferred to the transfer base 60. The print coat layer is formed so as to cover the entire surface of the decorative 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 decorative layer 30 and the pressure-sensitive adhesive layer 40. The clear resin layer functions as a crack suppressing layer that suppresses the generation of cracks in the decorative layer 30. Examples of the resin constituting the clear resin layer include acrylic- (vinyl chloride-vinyl acetate copolymer) resin, vinyl chloride-vinyl acetate copolymer 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 decorative layer 30 and higher than the glass transition temperature of the bonded layer, and is substantially in 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 normal temperature, the clear resin layer itself may be deformed due to changes in temperature, and the deformation may act as stress on the decorative layer 30 to cause cracks in the decorative 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 adheres the transfer sheet 1 and the transfer base material 60 and joins the transfer sheet 1 to the transfer base material 60 when the transfer sheet 1 is transferred to the transfer 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 agent 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.

Examples of other monomers include methyl acrylate, methyl methacrylate, styrene, acrylonitrile, vinyl acetate, acrylic acid, methacrylic acid, itaconic acid, hydroxylethyl acrylate, hydroxylethyl methacrylate, propylene glycol acrylate, and 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 a commercially available product of the acrylic pressure-sensitive adhesive, for example, Nisset (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 substrate 60 to be transferred. 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, 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 so that the gel content is 50%.

<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 substrate 60 to be transferred. Examples of the release film 50 include a film that has undergone a mold release treatment, for example, a silicon mold release type polyethylene terephthalate (PET) 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 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) opposite to the decorative layer 30 in the pressure-sensitive adhesive layer 40 is exposed. As described above, since the release layer 20 of the present embodiment contains a polyester resin mixed with the vinyl chloride-vinyl acetate copolymer, the release strength between the release support 10 and the release layer 20 is determined. It is larger than the peel strength between the release film 50 and the pressure-sensitive adhesive layer 40. Therefore, the transfer sheet 1 of the present embodiment can suppress defective peeling in which the transfer layer is transferred to the release film 50 side when the release film 50 is peeled from the transfer sheet 1.

Next, as shown in FIG. 2B, the transfer sheet 1 from which the release film 50 has been peeled off is transferred to the substrate 60 to be transferred. The transfer of the transfer sheet 1 to the substrate to be transferred 60 can be continuously performed, for example, in the form of roll-to-roll, roll-to-sheet, or the like. Here, "roll-to-roll" means that the band-shaped transfer sheet 1 is pulled out from the roll and supplied to a flat plate-shaped transfer target (the transfer base body 61 described later), and the transfer layer is placed on the transfer target. This is a processing mode in which the band-shaped releasable support (release support 10) after demolding the transfer layer is wound on a roll again after being transferred to. Further, the "roll to sheet" means that the band-shaped transfer sheet 1 is pulled out from the roll and supplied to the flat plate-shaped transfer target, and the transfer sheet 1 is generally transferred before and after the transfer layer is transferred onto the transfer target. This is a processing mode in which the transfer layer is cut to the size of one sheet to be transferred and made into single leaves, and the release support of the single leaves after the transfer layer is released is removed (discarded) one by one. Further, the transfer sheet 1 may be manually transferred to the transfer base material 60 and then pressed with a spatula or the like to uniformly adhere to the surface of the transfer base material 60. The transfer sheet 1 of the present embodiment can be transferred to the substrate to be transferred 60 at room temperature.

The transfer base material 60 includes a transfer base material main body 61 and a sealer layer 62.
The transfer base body 61 is a transfer body to which the transfer sheet 1 is transferred. Examples of the base material body 61 to be transferred include boards, walls, and the like made of materials such as inorganic materials, wood, resin, and silk cloth. Among these, examples of the inorganic material include stone, concrete, glass, metal and the like. Further, the base material body 61 to be transferred may be a fired product (ceramic fired product) such as ceramics made of an inorganic material.

The sealer layer 62 is an undercoat layer for smoothing the surface of the transfer base body 61 to improve the adhesion between the transfer base body 61 and the transfer sheet 1. When the smoothness of the surface (transferred surface) of the transferred substrate main body 61 is sufficient, the sealer layer 62 is omitted.
As the shape of the substrate 60 to be transferred, for example, a plate, a sheet, a film, various three-dimensional shapes (cylinder, polygonal pillar, etc.) and the like are selected according to the intended use. As a general shape of the substrate 60 to be transferred, a flat plate shape is widely used.

Next, as shown in FIG. 3C, the releasable support 10 is peeled off from the transfer sheet 1 transferred to the substrate 60 to be transferred. By peeling the releasable support 10 from the transfer sheet 1, the transfer of the transfer sheet 1 to the transfer substrate 60 is completed. Further, by peeling the releasable support 10 from the transfer sheet 1, the surface of the peeling layer 20 opposite to the decorative layer 30 is exposed. In FIG. 3C, the pressure-sensitive adhesive layer 40 of the transfer sheet 1 and the base material 60 to be transferred are bonded with a strong adhesive force, so that when the releaseable support 10 is peeled off from the transfer sheet 1, the releaseable support 10 is peeled off. The transfer layer does not peel off from the transfer 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, gloss, 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, it is possible to obtain the decorative material 100 in which the transfer sheet 1 is transferred to the substrate 60 to be transferred.

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.
(Example 1)
As the releasable support 10, a 26 μm-thick PET film (“Diafoil” manufactured by Mitsubishi Plastics Co., Ltd.) was prepared. Next, a vinyl chloride-vinyl acetate copolymer resin composition (“UVC5” manufactured by Showa Ink Kogyo Co., Ltd.) and a polyester resin composition (“film reinforcing material” manufactured by Showa Ink Kogyo Co., Ltd.) were added in terms of resin mass ratio. A mixed ink was prepared so as to have a ratio of 100: 0.2. This ink was applied to one surface of the releasable support 10 (PET film) to form a release layer 20 having a film thickness (dry) of 1 μm. A decorative layer 30 as shown in FIG. 1 was formed on the release layer 20 by printing a plurality of times with a gravure ink (“BC heat resistant” manufactured by Showa Ink Industry Co., Ltd.) composed of an acrylic resin composition and a coloring pigment. ..

On the other hand, as the release film 50, a PET separator having a thickness of 25 μm (“Tokuro release film” manufactured by Toyo Cloth Co., Ltd.) was prepared. A pressure-sensitive adhesive layer made of an acrylic acid ester resin (“Nisetsu” manufactured by Nippon Carbide Industries, Ltd.) is coated on the release film 50 so as to have a film thickness (dry) of 20 μm, and dried to show that shown in FIG. The pressure-sensitive adhesive layer 40 as shown was formed.

Then, after the decorative layer 30 on the releasable support 10 side and the 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. 1 transfer sheet was obtained. The layer structure of Example 2 and Comparative Examples 1 to 3 shown below is the same as that of Example 1 described above.

(Example 2)
Example 2 under the same materials and conditions as in Example 1 except that an ink obtained by mixing a vinyl chloride-vinyl acetate copolymer resin composition and a polyester resin composition at a ratio of 100: 0.4 was used as the release layer 20. A transfer sheet was obtained.

(Comparative Example 1)
Comparative Example 1 under the same materials and conditions as in Example 1 except that an ink obtained by mixing a vinyl chloride-vinyl acetate copolymer resin composition and a polyester resin composition at a ratio of 100: 0.1 was used as the release layer 20. A transfer sheet was obtained.

(Comparative Example 2)
Comparative Example 1 under the same materials and conditions as in Example 1 except that an ink obtained by mixing a vinyl chloride-vinyl acetate copolymer resin composition and a polyester resin composition at a ratio of 100: 0.5 was used as the release layer 20. A transfer sheet was obtained.

(Comparative Example 3)
The same material as in Example 1 except that an acrylic resin composition (“46-7” manufactured by Showa Ink Kogyo Co., Ltd.) was used as the release layer 20 instead of the vinyl chloride-vinyl acetate copolymer resin composition. Under the conditions, a transfer sheet of Comparative Example 3 was obtained.

The transfer sheets of Examples 1 and 2 and Comparative Examples 1 to 3 were transferred to a 1 mm thick aluminum plate (transfer base material 60) to obtain a decorative material as a sample. Then, each decorative material was evaluated for defective peeling before transfer, transferability at the time of transfer, and recoatability after transfer.

The defective peeling is a test item for verifying whether or not the transfer layer has moved to the peeling film 50 side when the peeling film 50 (PET separator) is peeled from the transfer sheet. When the release film 50 was peeled off from the transfer sheet, the case where the transfer layer was completely transferred to the release film 50 side was designated as “x”, and the case where a part of the transfer layer was transferred to the release film 50 side was designated as “Δ”. .. Further, the case where the transfer layer does not move to the release film 50 side when the release film 50 is peeled from the transfer sheet is designated as “◯”.

The transferability is a test item for verifying whether or not the releasable support 10 can be cleanly peeled off from the transfer sheet after the transfer sheet is attached to the aluminum plate. When the releasable support 10 is peeled off from the transfer sheet, the case where the releasable support 10 cannot be peeled off or the transfer layer remains on a part of the releasable support 10 is marked with "x" to support the releasable support. The case where the transfer layer could be peeled off with almost no remaining on the body 10 was designated as “◯”.

The recoat property is a test item for verifying the adhesion of the top coat layer 70 formed on the surface of the release layer 20. Here, a paint film to which 100 parts by mass of an ultraviolet curable resin composition (“M305” manufactured by Toagosei Co., Ltd.) is added so as to have 3 parts by mass of Irgacure 184 (manufactured by BASF) is added to a film thickness (dry) of 10 μm. It was formed on the surface of the release layer 20 so as to be. Then, it was cured by irradiating it with ultraviolet rays having an exposure amount of 600 mJ / cm ² with a high-pressure mercury lamp to form a top coat layer 70. The adhesion between the top coat layer 70 and the lower release layer 20 was tested by a cross-cut method based on JIS K5600-5-6. The case where peeling (including the case where a part of the top coat layer 70 remained) was observed was marked with “x”, and the case where peeling was not observed was marked with “◯”.
Table 1 shows the results of each of the above test items for the transfer sheets of Examples 1 and 2 and Comparative Examples 1 to 3.

(Evaluation results)
It was confirmed that the transfer sheets of Examples 1 and 2 can suppress defective peeling in which the transfer layer is transferred to the release film 50 side when the release film 50 is peeled from the transfer sheet 1. Further, it was confirmed that the decorative material having the transfer sheets of Examples 1 and 2 was able to peel off the releasable support 10 from the transfer sheet without leaving the transfer layer. Further, it was confirmed that the decorative material having the transfer sheets of Examples 1 and 2 was excellent in the recoatability of the release layer 20 which is the outermost layer.

In the decorative material having the transfer sheet of Comparative Example 1, the same results as in Examples 1 and 2 were obtained in terms of transferability and recoatability. However, it was confirmed that the transfer sheet of Comparative Example 1 had defective peeling. This is because the transfer sheet of Comparative Example 1 has a smaller compounding ratio of the polyester resin composition to the vinyl chloride-vinyl acetate copolymer resin composition than in Examples 1 and 2 (100: 0.1). It is considered that the peel strength between the type support 10 and the transfer layer became smaller than the peel strength between the peel film 50 and the pressure-sensitive adhesive layer 40.

In the transfer sheet of Comparative Example 2, the same results as in Examples 1 and 2 were obtained for defective peeling. However, in the decorative material having the transfer sheet of Comparative Example 2, it was observed that the transfer layer remained on the releasable support 10 in terms of transferability. Further, in terms of recoatability, peeling of the top coat layer 70 was observed. This is because, in the transfer sheet of Comparative Example 2, the compounding ratio of the polyester resin composition to the vinyl chloride-vinyl acetate copolymer resin composition is larger than that of Examples 1 and 2 (100: 0.5), so that the polyester Due to the influence of the resin composition, the peeling strength (adhesion) between the releasable support 10 and the transfer layer became too high, and it became difficult to separate the releasable support 10 from the transfer layer. It is probable that the recoatability was reduced.

In the decorative material having the transfer sheet of Comparative Example 3, the same results as in Examples 1 and 2 were obtained in terms of transferability. However, in the transfer sheet of Comparative Example 3, it was observed that a part of the transfer layer was transferred to the release film 50 side for defective peeling. This is because the transfer sheet of Comparative Example 3 has an acrylic resin composition as the main resin constituting the release layer 20, so that it is compared with the case where the vinyl chloride-vinyl acetate copolymer resin composition is used alone. Although the peel strength with the releasable support 10 was increased, it is probable that defective peeling occurred because the degree was insufficient. Further, in the decorative material having the transfer sheet of Comparative Example 3, peeling of the top coat layer 70 was observed in terms of recoatability. This is because the main resin constituting the release layer 20 is an acrylic resin composition, so that the solvent solubility after forming the coating film is poor as compared with the vinyl chloride-vinyl acetate copolymer resin composition, and the recoatability is improved. It is considered to have decreased.

As described above, it is clear that in the transfer sheets of Examples 1 and 2, it is possible to suppress defective peeling in which the transfer layer is transferred to the release film 50 side when the release film 50 is peeled from the transfer sheet 1. became. Further, it was clarified that the decorative materials having the transfer sheets of Examples 1 and 2 are also excellent in transferability and recoatability of the top coat layer.
Further, since the transfer sheets of Examples 1 and 2 can be transferred to the substrate at room temperature (non-heating), a transfer device and a heater equipped with a heating device at the time of transfer can be used like a transfer sheet that requires heating for transfer. It becomes unnecessary. Therefore, the transfer sheets of Examples 1 and 2 are also excellent in workability during transfer.

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

1 Transfer sheet 10 Releaseable support 20 Release layer 30 Decorative layer 40 Adhesive layer 50 Release film 60 Transfer base material 70 Top coat layer

Claims (2)

The releasable support, the release layer, the decorative layer, and the adhesive layer are laminated in this order.
The releasable support contains a polyester resin and has
The release layer contains a vinyl chloride-vinyl acetate copolymer and a polyester resin.
The release layer is a transfer sheet in which 0.2 to 0.4 parts by mass of the polyester resin contained in the release layer is mixed with 100 parts by mass of the vinyl chloride-vinyl acetate copolymer .

A method for producing a decorative material using the transfer sheet according to claim 1.
The step of transferring the surface of the pressure-sensitive adhesive layer of the transfer sheet to the substrate to be transferred,
A step of peeling the releasable support from the transfer sheet transferred to the substrate to be transferred, and
A method for producing a decorative material, comprising a step of forming a top coat layer on the surface of the release layer of the transfer sheet.

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