JP2020157710A - Transfer sheet - Google Patents

Abstract

To provide a transfer sheet that is excellent in heat resistance after the transfer layer thereof is transferred.SOLUTION: A transfer sheet 1 has the following laminated in this order: a releasable support body 10; a decorative layer 30; and an adhesive layer 40. The storage modulus of the adhesive layer 40 at 30°C is 1200 kPa or less and the loss modulus at 30°C is 870 kPa or less. Preferably, the storage modulus of the adhesive layer 40 at 100°C is 970 kPa or less and the loss modulus at 100°C is 260 kPa or less.SELECTED DRAWING: Figure 1

Description

The present invention relates to a transfer sheet.

Conventionally, as a building material used for wall materials, partitions, etc. of buildings, a transfer sheet on which various patterns are printed is transferred (pasted) to a base material such as stone, concrete, or metal plate to be transferred. The material is used. 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 plate having the same design as natural wood can be obtained.

In the transfer sheet as described above, the releasable support, the decorative layer, and the adhesive layer are laminated in this order. In this transfer sheet, the decorative layer side is adhered to the base material, and then the support is peeled off, so that the transfer layer composed of the decorative layer, the adhesive layer, and the like is transferred onto the base material to be transferred.

After the transfer layer was transferred to the transfer target, a paint was sometimes applied on the transfer layer in order to protect the transfer layer (see, for example, Patent Document 1).
Further, after applying the paint on the transfer layer, heat drying may be performed. In this heat drying, it is desirable to dry at a higher temperature from the viewpoint of working speed.
However, when the transfer is performed with air remaining between the adhesive layer and the transferred body (when air biting occurs), the transfer layer swells at a high temperature during heating and drying, resulting in an appearance. There was a loss.

JP-A-2018-171767

An object of the present invention is to provide a transfer sheet having excellent heat resistance after the transfer layer is transferred.

The present invention solves the above-mentioned problems by the following solutions. 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 description is not limited thereto.

In the first invention, the releasable support (10), the decorative layer (30), and the adhesive layer (40) are laminated in this order, and the adhesive layer (40) is stored at 30 ° C. The transfer sheet (1) having an elastic modulus of 1200 kPa or less and a loss elastic modulus at 30 ° C. of 870 kPa or less.

According to the second invention, in the transfer sheet (1) according to the first invention, the adhesive layer (40) has a storage elastic modulus at 100 ° C. of 970 kPa or less and a loss elastic modulus at 100 ° C. The transfer sheet (1) is characterized by having a speed of 260 kPa or less.

The third invention states that in the transfer sheet (1) according to the first invention or the second invention, the adhesive layer (40) has a loss sine at 100 ° C. of 0.24 or less. It is a characteristic transfer sheet (1).

According to the present invention, it is possible to provide a transfer sheet having excellent heat resistance after the transfer layer is transferred.

It is sectional drawing of the transfer sheet 1 of this 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. 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. It is a figure which summarized the result of having performed the comparative experiment about the example and the comparative example of different adhesives.

Hereinafter, the best mode for carrying out the present invention will be described with reference to drawings and the like.

(Embodiment)
FIG. 1 is a cross-sectional view of the transfer sheet 1 of the present embodiment.
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.
Further, in the following description, specific numerical values, shapes, materials and the like will be described, but these can be changed as appropriate.

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 releasable support 10, a release layer 20, a decorative layer 30, an adhesive layer 40, and a release base sheet 50.

The transfer sheet 1 in the present embodiment adopts the form of a flexible and thin film as the releasable support 10 having releasability with respect to the transfer layer below the release layer. On the releasable support 10, a transfer layer composed of a release layer 20, a decorative layer 30, and an adhesive layer 40, and a release base sheet 50 having releasability with respect to the adhesive layer 40 are laminated in this order. Has been done. In the present invention, "laminating in this order" means not only direct lamination but also indirect lamination. For example, another layer is formed between the releasable 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 composed of the release layer 20 and the like, and after the transfer sheet 1 is transferred to the transfer target 60 (described later), from the interface with the release layer 20. Demolded. Examples of the releasable support 10 include polyester resins such as polyethylene terephthalate, polyethylene naphthalate, 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 process may be applied.
The film thickness of the releasable support 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 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 transfer target 60 and the releasable support 10 is peeled off. A top coat layer 70 (described later) is formed on the surface of the release layer 20.

As the release layer 20, for example, an acrylic resin, a vinyl chloride-vinyl acetate copolymer resin, an acrylic polyol resin, a urethane resin, or the like can be used.
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-chlorobenzotriazole, 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 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) benzylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) benzene, bis (1-octyl oshiki-2,2,6,6-tetramethyl) -4-piperidinyl) sevacate, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) sevacate, methyl (1,2,2,6,6-pentamethyl-4-piperidinyl) sevacate, 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 light stabilizers derived from decanedic acid (sebacic acid) such as 4-piperidinyl) sebacate.
Further, in order to improve the weather resistance (particularly 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.

<Decorative layer 30>
The decorative layer 30 is a printed design layer on which the design of the transfer sheet 1 is formed. Examples of the resin constituting the decorative layer 30 include acrylic resin, vinyl acetate (vinyl chloride-vinyl acetate copolymer) resin, acrylic-vinyl acetate resin and the like. 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 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 transferred body 60 when the transfer sheet 1 is transferred to the transferred body 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 adhesive layer 40. The clear resin layer functions as a crack suppressing layer that suppresses the occurrence of cracks in the decorative 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 decorative 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 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 adhesive layer 40 is a layer that joins the transfer sheet 1 and the transfer body 60 when the transfer sheet 1 is transferred to the transfer body 60. The 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 a curing agent.
The layer thickness of the 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, hydroxyl ethyl 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.

[Hardener]
As the curing agent, isocyanate-based, epoxy-based, metal chelate-based, and the like can be used. These can be used alone or in combination of two or more.
The content of the curing agent in the adhesive layer 40 is set according to the target gel fraction, storage elastic modulus, and loss elastic modulus.

[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 transferred body 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 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.

[Epoxy curing agent]
Examples of the epoxy-based curing agent include bisphenol A epichlorohydrin-type epoxy resin, ethylene glycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, 1,6-hexanediol glycidyl ether, and trimethylol propane. Triglycidyl ether, diglycidyl aniline, diamine glycidyl amine, N, N, N', N'-tetraglycidyl-m-xylylene diamine, 1,3-bis (N, N'-diamine glycidyl aminomethyl) cyclohexane, etc. Examples thereof include compounds having two or more epoxy groups in the molecule.

[Metal chelate hardener]
Examples of the metal chelate-based curing agent include alkoxide, acetylacetone, ethyl acetoacetate, and the like in polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium, and zirconium. Examples include the ranked compound.

<Release base sheet 50>
The release base sheet 50 is a film that is peeled from the transfer sheet 1 when the transfer sheet 1 is transferred to the transfer target 60. Examples of the release base sheet 50 include silicon release type polyethylene terephthalate (PET), untreated polyethylene terephthalate, polypropylene and the like.
The thickness of the release base sheet 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 transfer sheet 1)
As the releasable support 10, a 26 μm-thick PET film (“Diafoil” manufactured by Mitsubishi Plastics Co., Ltd.) is prepared, and an ink composition made of acrylic polyol resin is applied to one surface thereof to obtain a film thickness (dry). ) A 1 μm release layer 20 was formed. A printing layer 30 was formed on the peeling layer 20 by performing printing a plurality of times using a gravure ink composed of an acrylic-vinyl acetate resin composition and a coloring pigment.

Further, as the release base sheet 50, a PET separator having a thickness of 25 μm (“Toyo Cloth Co., Ltd.” manufactured by Toyo Cloth Co., Ltd.) is prepared, and four types of adhesives described later are applied thereto with a film thickness (dry) of 20 μm. The adhesive layer 40 was formed by coating and drying so as to be.
Then, after the printing layer 30 on the release support 10 side and the adhesive layer 40 on the release base sheet 50 side are bonded together, the transfer sheet 1 is heated and cured at 40 ° C. for 3 days to obtain the transfer sheet 1. Obtained.

(Manufacturing method of decorative material 100)
Next, a method for producing the decorative material 100 will be described.
2 to 5 are cross-sectional views illustrating a method for producing the decorative material 100, respectively.

First, as shown in FIG. 2, the release base sheet 50 is peeled from the transfer sheet 1. By peeling the release base sheet 50 from the transfer sheet 1, the surface (adhesive surface) of the adhesive layer 40 opposite to the decorative layer 30 is exposed.

Next, as shown in FIG. 3, the transfer sheet 1 from which the release base sheet 50 has been peeled off is transferred (attached) to the transferred body 60. The transfer of the transfer sheet 1 to the transfer target 60 can be continuously performed in the form of, for example, roll-to-roll, roll-to-sheet, or the like. Here, the "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 (adhesion body 61), and the transfer layer is transferred. This is a processing mode in which the strip-shaped releasable support 10 after the transfer layer is released from the transfer layer is wound on a roll again after the transfer is performed. The "roll-to-sheet" is a band-shaped transfer sheet 1 that is pulled out from a roll (winding) and supplied to a 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 approximately the size of one transfer body to form a single sheet, and the transfer layer is removed (discarded) one by one from the single leaf releasable support 10 after the transfer layer is released. Say. Alternatively, the transfer sheet 1 may be manually transferred to the transferred body 60 and then pressed with a spatula or the like to uniformly adhere to the surface of the transferred body 60.

When the transfer sheet 1 of the present embodiment is transferred to the transferred body 60, it is adhered in a state where the temperature of the base material is about 20 to 40 ° C. by heating as necessary. By performing the transfer under the condition of 20 to 40 ° C., the adhesive is transferred in a state of maintaining flexibility, and sufficient adhesive force can be secured. Further, it is possible to prevent air from remaining between the adhesive layer 40 and the transferred body 60 during transfer (hereinafter, also referred to as “air biting”).

The transferred body 60 includes an adherend body 61 and a sealer layer 62.
The adherend body 61 is an article to be transferred to which the transfer sheet 1 is transferred. Examples of the adherend body 61 include a plate, a wall, and the like made of a material such as an inorganic material, wood, and resin. Among these, examples of the inorganic material include stone, concrete, glass, metal and the like. Further, the adherend body 61 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 adherend body 61 and improving the adhesion between the adherend body 61 and the transfer sheet 1. If the surface (transferred surface) of the adherend body 61 is sufficiently smooth, the sealer layer 62 is omitted.

Next, as shown in FIG. 4, the releasable support 10 is peeled off from the transfer sheet 1 transferred to the transfer target 60. 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.

Next, as shown in FIG. 5, 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.
Further, in the present embodiment, after applying the top coat layer 70, a heating and drying step is performed. In this heat-drying step, dry air heated to 90 ° C. is continuously applied from the surface side of the top coat layer 70 for about 15 minutes to accelerate the drying of the top coat layer 70.
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 transferred body 60.

(Preferable physical properties of the adhesive layer 40)
Conventionally, in the above-mentioned drying step of the top coat layer 70, the transfer layer (release layer 20, decorative layer 30, adhesive layer 40) may swell in rare cases, resulting in poor appearance. As a result of conducting verification experiments and analyzing a large number of transfer sheets for this swelling phenomenon of the transfer layer, it was found that the physical properties of the adhesive layer 40 at each temperature during transfer and drying have a great influence on the swelling phenomenon. We were able to obtain a configuration that can prevent the phenomenon. This will be described below.

FIG. 6 is a diagram summarizing the results of comparative experiments conducted on examples and comparative examples of different adhesives.
As an example, two types of transfer sheets, an adhesive A and an adhesive B, in which the adhesives of the adhesive layer 40 are different are prepared. Both the adhesive A and the adhesive B are mainly composed of an acrylic polyol. Further, the adhesive A contains isocyanate and epoxy as a curing agent, and the adhesive B contains isocyanate as a curing agent.

As a comparative example, two types of transfer sheets, an adhesive C and an adhesive D, in which the adhesives of the adhesive layer 40 are different were prepared. Both the adhesive C and the adhesive D contain an acrylic polyol as a main component and an isocyanate as a curing agent. The adhesive C and the adhesive D have very similar configurations as the main agent and the curing agent, but the main agents themselves use different materials, and the amounts of the curing agents also differ.

The storage elastic modulus and the loss elastic modulus of the adhesive A and the adhesive B of the above example and the adhesive C and the adhesive D of the comparative example were measured at temperatures of 30 ° C. and 100 ° C., respectively. The result of obtaining the loss sine is shown in FIG. In addition, 30 ° C. is a temperature condition at the time of transfer, and 100 ° C. is a temperature condition having a slight margin in the temperature of the drying step.
The storage elastic modulus, the loss elastic modulus, and the loss tangent were measured in accordance with JIS K 7244-10. As a pretreatment for the measurement, the adhesive was made into a mass of about 5 mm ³ and crushed by applying a load of 100 g with a jig so that the upper surface and the bottom surface were sufficiently in contact with the jig. As for the thickness, the value of the chuck distance after applying a load of 100 g and leaving it for about 5 minutes was taken as the film thickness value. Sine wave 10 Hz strain was applied to this sample and dynamic viscoelasticity was measured.

Further, the decorative material 100 is produced by using the transfer sheet 1 provided with the adhesive A and the adhesive B of the example and the adhesive C and the adhesive D of the comparative example as the adhesive layer 40, and the swelling phenomenon occurs. The result of examining the presence or absence is shown in FIG.
The transfer sheet 1 composed of the adhesive A and the adhesive B of the examples did not cause the swelling phenomenon, but the transfer sheet 1 composed of the adhesive C and the adhesive D of the comparative example did cause the swelling phenomenon. Occurred.

Here, looking at the storage elastic modulus, the loss elastic modulus, and the loss sine shown in FIG. 6, first, there is a large difference between the example and the comparative example in terms of the storage elastic modulus and the loss elastic modulus at 30 ° C. Can be read.
From the results of FIG. 6, it is desirable that the adhesive layer 40 has a storage elastic modulus of 1200 kPa or less at 30 ° C. and a loss elastic modulus of 870 kPa or less at 30 ° C. Further, it is more desirable that the adhesive layer 40 has a storage elastic modulus at 30 ° C. of 1000 kPa or less and a loss elastic modulus at 30 ° C. of 710 kPa or less.
The cause of the swelling phenomenon is air biting during transfer. If the air biting at the time of transfer can be eliminated or the air biting can be suppressed to the extent that the swelling phenomenon does not occur, the swelling phenomenon in the drying process can be prevented. As described above, at the temperature of 30 ° C. at the time of transfer, when the storage elastic modulus and the loss elastic modulus are the above-mentioned preferable values, the adhesive has high flexibility and the followability to the substrate is improved. It is presumed that the air biting of the air can be effectively suppressed.

Further, from the results of FIG. 6, it is desirable that the adhesive layer 40 has a storage elastic modulus of 970 kPa or less at 100 ° C. and a loss elastic modulus of 260 kPa or less at 100 ° C. Further, it is more desirable that the adhesive layer 40 has a storage elastic modulus at 100 ° C. of 610 kPa or less and a loss elastic modulus at 100 ° C. of 101 kPa or less.
The reason why the swelling phenomenon can be suppressed by this condition is that even if bubbles caused by air biting expand at high temperature, the bubbles are adhered without being concentrated in one place because the adhesive layer 40 is flexible. It is presumed that the effect of deformation of the decorative layer 30, that is, not observed as a swelling phenomenon, occurs only as the expansion and movement of the bubbles in the agent layer 40.

Further, from the results of FIG. 6, it is desirable that the adhesive layer 40 has a loss sine of 0.24 or less at 100 ° C. Further, it is more desirable that the adhesive layer 40 has a loss sine at 100 ° C. of 0.26 or less.
The reason why the swelling phenomenon can be suppressed by this condition is that the small value of the loss sine can be regarded as having physical properties close to those of an elastic body, so that the bubbles caused by air biting expand at high temperatures. However, it is presumed that the adhesive layer 40 elastically deforms the bubbles to absorb the swelling, and the effect of not being observed as a swelling phenomenon in appearance is occurring.

As described above, the adhesive layer 40 is configured so that the storage elastic modulus, the loss elastic modulus, and the loss sine are appropriate values, thereby preventing the swelling phenomenon of the topcoat layer 70 in the drying process. It is possible to provide a transfer sheet 1 having excellent heat resistance after the transfer layer is transferred.

(Transformed form)
Not limited to the embodiments described above, various modifications and changes are possible, and these are also within the scope of the present invention.

(1) In the embodiment, the transfer sheet has been described by exemplifying a specific layer structure. Not limited to this, the layer structure of the transfer sheet can be changed as appropriate. For example, the release layer 20 may be omitted, or the decorative layer 30 may have a more multi-layered structure.

(2) In the embodiment, the transferred body 60 to which the transfer layer of the transfer sheet 1 is transferred has been described with reference to an example in which the adherend body 61 and the sealer layer 62 are provided. Not limited to this, the transfer sheet of the present invention can exert the same effect even when transferring to a transferred body not provided with the sealer layer 62.

The embodiment and the modified form can be used in combination as appropriate, but detailed description thereof will be omitted. Moreover, the present invention is not limited to each of the embodiments described above.

1 Transfer sheet 10 Releasable support 20 Release layer 30 Decorative layer 40 Adhesive layer 50 Release base sheet 60 Transfer material 61 Adhesive body 62 Sealer layer 70 Top coat layer 100 Cosmetic material

Claims (3)

The releasable support, the decorative layer, and the adhesive layer are laminated in this order.
The adhesive layer is
The storage elastic modulus at 30 ° C. is 1200 kPa or less, and
The elastic modulus at 30 ° C. is 870 kPa or less,
The transfer sheet that is. In the transfer sheet according to claim 1,
The adhesive layer is
The storage elastic modulus at 100 ° C. is 970 kPa or less, and
Elastic modulus lost at 100 ° C. is 260 kPa or less,
A transfer sheet characterized by being. In the transfer sheet according to claim 1 or 2.
The adhesive layer is
Loss sine at 100 ° C is 0.24 or less,
A transfer sheet characterized by being.

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