Transfer sheet, method for manufacturing article, and article equipped with release film

Abstract

To provide a transfer sheet that satisfies all of the following: suppression of lifting of the transfer sheet at a corner portion; suppression of partial peeling of a release film due to spring-backing; and enabling the release film to be easily peeled off from the transfer layer.SOLUTION: There is provided a transfer sheet comprising: a release film; and a transfer layer disposed on one surface of the release film. Loop stiffness of the release film is 0.18 N / 15 mm or less, a peel strength of the release film and the transfer layer is 0.7 N / 25 mm or less, and when the loop stiffness is designated as X and the peel strength is designated as Y, the X and the Y satisfy Y≥0.67X+0.17.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a transfer sheet, a method for manufacturing an article, and an article with a release film.

Background Art

[0002] It is known to decorate an adherend such as a metal member and a resin member by transferring a transfer layer (a layer transferred from the transfer sheet) in the transfer sheet to the adherend. For example, Patent Document 1 discloses a rain gutter in which an oxide film layer is disposed on the outer surface of an aluminum base material, a decorative layer is disposed on the outer surface thereof, and a pattern is applied to the surface of the decorative layer. Specifically, Patent Document 1 discloses forming a decorative layer on the outer surface of an anodized aluminum base material by a hydrostatic transfer process.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When transferring the transfer layer in the transfer sheet to an adherend having a plurality of surfaces, due to the stiffness (stiffness) of the release film in the transfer sheet, the transfer sheet may float from the adherend at the corner portion of the adherend. Further, after the transfer sheet is brought into close contact with the adherend, due to the stiffness of the release film, the release film may be partially peeled off from the transfer layer (partial peeling of the release film due to springback). Furthermore, it is required that the release film can be satisfactorily peeled off from the transfer layer after the transfer sheet is brought into close contact with the adherend.

[0005] The present disclosure has been made in view of the above circumstances, and its main object is to provide a transfer sheet that achieves both suppression of the lifting of the transfer sheet at the corner portion, suppression of partial peeling of the release film due to springback, and good peelability of the release film from the transfer layer.

Means for Solving the Problems

[0006] In the present disclosure, there is provided a transfer sheet having a release film and a transfer layer disposed on one surface of the release film, wherein the loop stiffness of the release film is 0.18 N / 15 mm or less, the peel strength between the release film and the transfer layer is 0.7 N / 25 mm or less, and when the loop stiffness is X and the peel strength is Y, X and Y satisfy Y≧0.67X + 0.17.

[0007] In the present disclosure, there is provided a method for manufacturing an article, which includes a preparation step of preparing an adherend having a plurality of surfaces and the above-described transfer sheet, and a wrapping process step of sequentially bonding the transfer layer in the transfer sheet to the plurality of surfaces of the adherend using a roller.

[0008] In the present disclosure, there is provided an article with a release film, which has an adherend having a plurality of surfaces, a transfer layer disposed following the plurality of surfaces, and a release film disposed following the transfer layer. The loop stiffness of the release film is 0.18 N / 15 mm or less. The peel strength between the release film and the transfer layer is 0.7 N / 25 mm or less. When the loop stiffness is X and the peel strength is Y, X and Y satisfy Y≧0.67X + 0.17.

Advantages of the Invention

[0009] In the present disclosure, there is an effect that it is possible to provide a transfer sheet that achieves both suppression of floating of the transfer sheet at the corner portion, suppression of partial peeling of the release film due to springback, and good peelability of the release film from the transfer layer.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments will be described with reference to the drawings and the like. However, the present disclosure can be implemented in many different modes and should not be limited to the description content of the embodiments exemplified below. Also, for the purpose of making the description clearer, the drawings may schematically represent the width, thickness, and shape of each part compared to the actual form, but this is merely an example and should not be construed as a limitation.

[0012] In this specification, when expressing the manner of arranging one member relative to another member, if simply denoted as "above" or "below" without particular notice, it includes both the case where another member is arranged immediately above or below in contact with a certain member, and the case where another member is arranged above or below a certain member with yet another member interposed therebetween. Also, in this specification, when expressing the manner of arranging one member relative to the surface of another member, if simply denoted as "on the surface" without particular notice, it includes both the case where another member is arranged immediately above or below in contact with a certain member, and the case where another member is arranged above or below a certain member with yet another member interposed therebetween.

[0013] Hereinafter, the transfer sheet, the method for manufacturing an article, and the article with a release film in the present disclosure will be described in detail.

[0014] A. Transfer sheet FIG. 1(a) is a schematic cross-sectional view illustrating a transfer sheet in the present disclosure. As shown in FIG. 1(a), the transfer sheet 10 has a release film 1 and a transfer layer X disposed on one surface of the release film 1. The transfer layer X shown in FIG. 1(a) has a first protective layer 2 and a second protective layer 3 in this order from the release film 1 side in the thickness direction D T In addition, as shown in FIG. 1(b), the transfer sheet 10 may have a design layer 4 on the surface of the second protective layer 3 opposite to the first protective layer 2. In the present disclosure, the loop stiffness of the release film 1 is within a predetermined range. Also, the peel strength between the release film 1 and the transfer layer X is within a predetermined range. Further, the loop stiffness of the release film 1 and the peel strength between the release film 1 and the transfer layer X satisfy a predetermined relationship.

[0015] According to the present disclosure, the loop stiffness and the peel strength are within specific ranges, respectively. Further, by satisfying a specific relationship between the loop stiffness and the peel strength, it is possible to suppress the lifting of the transfer sheet at the corner portion, suppress the partial peeling of the release film due to springback, and enable the release film to be peeled off well from the transfer layer, resulting in a transfer sheet that achieves both.

[0016] As described above, when transferring the transfer layer in the transfer sheet onto an adherend having a plurality of surfaces, due to the stiffness of the release film in the transfer sheet, the transfer sheet may not adhere sufficiently to the adherend at the corner portion of the adherend, and the transfer sheet may lift from the adherend. The corner portion of the adherend is the boundary portion between adjacent surfaces. Lifting of the transfer sheet at the corner portion may lead to product defects, so it is preferably not to occur. Further, after the transfer sheet is adhered to the adherend, due to the stiffness of the release film, the release film may be partially peeled off from the transfer layer (partial peeling of the release film due to springback). After the transfer sheet is adhered to the adherend, the release film functions as a protective film that protects the adherend and the transfer layer from external impacts. Therefore, it is preferably not to occur the partial peeling of the release film due to springback. Furthermore, for the transfer sheet, after the transfer sheet is adhered to the adherend, it is required that the release film can be peeled off well from the transfer layer.

[0017] In particular, at the stage immediately after the transfer sheet is brought into close contact with the adherend, it is required to suppress partial peeling of the release film from the transfer layer due to springback. On the other hand, finally, it is required that the release film, which also functions as a protective film, can be easily peeled off from the transfer layer. In response to such conflicting problems, the inventors of the present invention have conducted intensive research and found that when the peeling strength between the release film and the transfer layer is within a specific range, and further, when the above peeling strength and the loop stiffness of the release film satisfy a specific relationship, the above conflicting problems can be solved. Furthermore, the inventors of the present invention have found that when the loop stiffness of the release film is within a specific range, even when the transfer layer is attached to an adherend having a plurality of surfaces, it is possible to suppress the occurrence of lifting of the transfer sheet at the corner portion.

[0018] Also, as will be described later, the transfer sheet in the present disclosure is preferably used for wrapping processing. Wrapping processing is a process in which the transfer layer in the transfer sheet is sequentially bonded to a plurality of surfaces of the adherend using a roller. Since the peeling strength between the release film and the transfer layer is lower than, for example, the peeling strength of each layer constituting the transfer layer, when the transfer sheet is sequentially bonded to a plurality of surfaces as in wrapping processing, partial peeling of the release film due to the above-described springback is likely to occur. In contrast, in the present disclosure, when the peeling strength between the release film and the transfer layer is within a specific range, and further, when the above peeling strength and the loop stiffness of the release film satisfy a specific relationship, it is possible to suppress partial peeling of the release film from the transfer layer due to springback, and finally, the release film, which also functions as a protective film, can be easily peeled off from the transfer layer.

[0019] Also, as will be described later, the transfer sheet in the present disclosure is useful as a transfer sheet used for manufacturing exterior products (articles for outdoor use). Exterior products are exposed to harsher environments compared to interior products (articles for indoor use), and thus high weather resistance is required. For example, when manufacturing an exterior product using a decorative sheet, a transparent resin layer may be provided on the decorative sheet for the purpose of improving strength. In this case, since the transparent resin layer is a relatively thick layer, high weather resistance is imparted, for example, by adding a sufficient amount of a weathering agent to the transparent resin layer. On the other hand, it is highly technically difficult to impart high weather resistance to a transfer sheet that does not have a layer corresponding to the transparent resin layer. In the present disclosure, as will be described later, it is preferable that the transfer layer has a first protective layer and a second protective layer, and both the first protective layer and the second protective layer contain a weathering agent. Thereby, high weather resistance can be imparted while maintaining the properties required for the first protective layer (for example, surface properties such as scratch resistance) and the properties required for the second protective layer (for example, adhesion).

[0020] Also, in the case of a transfer sheet, the adhesion between the first protective layer and the second protective layer is likely to be insufficient. Here, in the case of a decorative sheet, usually, a design layer is formed on a base material layer, then a second protective layer is formed on the design layer, and then a first protective layer is formed on the second protective layer. Since the first protective layer is typically produced by curing a composition for forming the first protective layer formed on the second protective layer, the adhesion between the first protective layer and the second protective layer is good. In contrast, in the case of a transfer sheet, usually, a first protective layer is formed on a release film, then a second protective layer is formed on the first protective layer, and then a design layer is formed on the second protective layer. The first protective layer is typically produced by curing a composition for forming the first protective layer on the release film. Since the second protective layer is formed on the cured first protective layer, the adhesion between the first protective layer and the second protective layer is likely to be insufficient. In the present disclosure, it is preferable that the second protective layer is a layer having higher flexibility than the first protective layer. Thereby, the adhesion between the first protective layer and the second protective layer can be increased.

[0021] 1. Loop stiffness and peel strength In the present disclosure, the loop stiffness of the release film is within a specific range. Also, in the present disclosure, the peel strength of the release film and the transfer layer is within a specific range. Further, in the present disclosure, the loop stiffness and the peel strength satisfy a specific relationship.

[0022] (1) Loop stiffness In the present disclosure, the loop stiffness of the release film is within a specific range. The loop stiffness determines the degree of firmness of the release film. FIG. 2 is an explanatory diagram for explaining the outline of the method for measuring the loop stiffness in the present disclosure. As shown in FIG. 2, the release film 1 peeled from the transfer sheet is cut to produce a strip-shaped sample, and the release film 1 is deformed into a loop shape by overlapping the ends of the release film 1. Thereafter, the overlapped ends are fixed by a fixing jig 41 of a loop stiffness tester. With respect to the loop-shaped release film 1 fixed by the fixing jig 41, a pressing jig 42 of the loop stiffness tester is pressed against it from the vertical direction, and the stress during compression is measured. In the present disclosure, the release film peeled from the transfer sheet is cut into a strip shape with a width of 15 mm and a length of 150 mm to produce a sample. Further, the sample is fixed to the loop stiffness tester so that the loop length is 60 mm, the pressing jig is pressed against it from the vertical direction, the stress during compression is measured, and the maximum value of the stress is obtained as the loop stiffness.

[0023] The loop stiffness of the release film is usually 0.18 N / 15 mm or less, and may be 0.15 N / 15 mm or less. If the loop stiffness of the release film is too large, the transfer sheet is likely to float at the corner portion. On the other hand, the loop stiffness of the release film is, for example, 0.005 N / 15 mm or more, may be 0.010 N / 15 mm or more, and may be 0.012 N / 15 mm or more. The loop stiffness of the release film can be adjusted, for example, by the thickness of the release film. Usually, the thicker the release film, the larger the loop stiffness.

[0024] (2) Peel strength In the present disclosure, the peel strength of the release film and the transfer layer is within a specific range. The peel strength of the release film and the transfer layer is measured by the following method. First, the transfer sheet is cut to a width of 25 mm, and double-sided tape is attached to the entire surface of the side of the release film opposite to the transfer layer, and the release film is fixed to a metal plate with a width of 25 mm. Next, a Nichiban-made cellophane tape (registered trademark) with a width of 25 mm is attached to the entire surface of the side of the transfer layer opposite to the release film. Next, using a peel strength testing device, the peel strength is measured under the conditions of a peel rate of 200 mm / min and a peel angle of 90°. After exceeding the upper yield point, the integral average value of the peel strength from the point reaching the lower yield point load to 20 mm is taken, and the peel strength (N / 25 mm) is calculated.

[0025] The peel strength of the release film and the transfer layer is usually 0.7 N / 25 mm or less, and may be 0.6 N / 25 mm or less. If the peel strength of the release film and the transfer layer is too large, it becomes difficult to peel the release film well from the transfer layer. On the other hand, the peel strength of the release film and the transfer layer is, for example, 0.17 N / 25 mm or more, and may be 0.19 N / 25 mm or more. The peel strength of the release film and the transfer layer can be adjusted, for example, by the surface properties of the surface of the release film on the transfer layer side and the hardness of the transfer layer (for example, the protective layer). For example, generally, the greater the surface roughness of the surface of the release film on the transfer layer side, the smaller the peel strength of the release film and the transfer layer. Also, generally, the softer the transfer layer (for example, the protective layer), the greater the peel strength of the release film and the transfer layer.

[0026] (3) Relationship between loop stiffness and peel strength In the present disclosure, when the loop stiffness is X and the peel strength is Y, X and Y generally satisfy Y ≧ 0.67X + 0.17. By X and Y satisfying the relational expression 1, partial peeling of the release film due to springback can be suppressed. As described in the examples described later, X and Y may satisfy Y ≧ 0.67X + 0.19. Also, X and Y may satisfy Y ≦ 2.99X + 0.03.

[0027] 2. Transfer layer The transfer layer in the present disclosure is a layer transferred from a transfer sheet. The transfer layer preferably has a protective layer that protects the surface of the adherend. Further, the transfer layer preferably has a design layer on the surface opposite to the release film of the protective layer.

[0028] (1) Protective layer The transfer layer in the present disclosure preferably has a protective layer. The protective layer is not particularly limited. Further, the transfer layer may have only one protective layer, or may have two or more protective layers. For example, the transfer layer may be a single layer of the first protective layer described later, or may be a single layer of the second protective layer described later. Among them, the transfer layer preferably has the first protective layer and the second protective layer described later in this order in the thickness direction from the release film side. This is because it is particularly useful as a transfer sheet used for exterior products (articles for outdoor use).

[0029] (i) First protective layer The transfer layer in the present disclosure preferably has a first protective layer. The first protective layer contributes to the improvement of the surface characteristics (for example, scratch resistance) of the article. The first protective layer and the release film may be arranged so as to be in direct contact, or may be arranged via another layer.

[0030] The first protective layer preferably contains, as a resin component, a cured product (crosslinked structure) of a curable resin composition. The proportion of the cured product of the curable resin composition is, for example, 70% by mass or more, may be 90% by mass or more, may be 95% by mass or more, or may be 100% by mass with respect to all the resin components constituting the first protective layer.

[0031] Examples of the curable resin composition used for the first protective layer include an ionizing radiation curable resin composition and a thermosetting resin composition. Examples of the ionizing radiation curable resin composition include an electron beam curable resin composition and an ultraviolet curable resin composition. Among these, the electron beam curable resin composition is preferable because it has less odor and is less likely to cause coloring since a polymerization initiator is not required.

[0032] The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter also referred to as "ionizing radiation curable compound"). The ionizing radiation curable functional group is a group that crosslinks and cures upon irradiation with ionizing radiation. Examples thereof include functional groups having an ethylenic double bond such as (meth)acryloyl group, vinyl group, allyl group, etc. In the present disclosure, the (meth)acryloyl group means an acryloyl group or a methacryloyl group.

[0033] Ionizing radiation refers to those having energy quanta capable of polymerizing or crosslinking molecules among electromagnetic waves or charged particle beams. Examples of ionizing radiation include electron beam (EB) and ultraviolet ray (UV). Further examples of ionizing radiation include electromagnetic waves such as X-ray and γ-ray, and charged particle beams such as α-ray and ion beam.

[0034] The ionizing radiation curable resin composition preferably contains, as the ionizing radiation curable compound, one or more selected from urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, polycarbonate (meth)acrylate, and acrylic (meth)acrylate. Among them, the ionizing radiation curable resin composition preferably contains at least urethane (meth)acrylate as the ionizing radiation curable compound. In the present disclosure, urethane (meth)acrylate means urethane acrylate or urethane methacrylate. Urethane (meth)acrylate is preferably caprolactam-based urethane (meth)acrylate.

[0035] When the ionizing radiation curable resin composition contains caprolactam-based urethane (meth)acrylate, the number of functional groups of the caprolactam-based urethane (meth)acrylate is preferably 2 or more and 4 or less, and more preferably 2 or more and 3 or less.

[0036] In addition, the radiation-curable resin composition may contain a caprolactam-based urethane (meth)acrylate and a urethane (meth)acrylate that is not modified with caprolactam. In this case, let the content of the caprolactam-based urethane (meth)acrylate contained in the first protective layer be M CLUA and the content of the urethane (meth)acrylate that is not modified with caprolactam be M UA . Let M UA and M CLUA . The mass ratio of M CLUA to the total of M CLUA and M UA (M CLUA / (M CLUA + M CLUA )) is, for example, 40% by mass or more and 90% by mass or less, may be 45% by mass or more and 80% by mass or less, or may be 50% by mass or more and 70% by mass or less.

[0037] The caprolactam-based urethane (meth)acrylate can usually be obtained by reacting a caprolactam-based polyol, an organic isocyanate, and a hydroxy (meth)acrylate. Examples of the synthesis method include a method in which a polycaprolactam-based polyol and an organic polyisocyanate are reacted to produce a polyurethane prepolymer containing -NCO groups (isocyanate groups) at both ends, and then reacted with a hydroxy (meth)acrylate.

[0038] As the caprolactam-based polyol, commercially available products can be used. Preferably, it has two hydroxyl groups, and the number average molecular weight is preferably 500 to 3000, more preferably 750 to 2000. Also, polyols other than caprolactam-based polyols, such as ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, etc., can be used by mixing one or more of them in any ratio. As the organic polyisocyanate, diisocyanate having two isocyanate groups is preferred. From the viewpoint of suppressing yellowing, isophorone diisocyanate, hexamethylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, trimethylhexamethylene diisocyanate, etc. are preferably mentioned. As the hydroxy(meth)acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, caprolactam-modified 2-hydroxyethyl acrylate, etc. are preferably mentioned.

[0039] When the radiation-curable resin composition contains a caprolactam-based polyol, the caprolactam-based urethane(meth)acrylate is preferably a caprolactam diol-based urethane(meth)acrylate. The caprolactam diol-based urethane(meth)acrylate refers to a urethane(meth)acrylate in which the terminal of the caprolactam-based urethane(meth)acrylate is diethylene glycol. By using the caprolactam diol-based urethane(meth)acrylate, the occurrence of cracks and whitening in the first protective layer can be suppressed.

[0040] The radiation-curable resin composition may contain a hydroxyl group-containing (meth)acrylate as a radiation-curable compound. Examples of the hydroxyl group-containing (meth)acrylate include hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxybutyl methacrylate, 1,4-cyclohexanedimethanol monoacrylate, polyethylene glycol monoacrylate, polyethylene glycol monomethacrylate, trimethylolpropane diacrylate, trimethylolpropane dimethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, glycidyl acrylate, glycidyl methacrylate, isocyanuric acid monoacrylate, isocyanuric acid monomethacrylate, isocyanuric acid diacrylate, isocyanuric acid dimethacrylate, glycerin diacrylate, and glycerin dimethacrylate. Further, the hydroxyl group-containing (meth)acrylate may be a hydroxyl group-containing (meth)acrylate modified with ethylene oxide (EO), propylene oxide (PO), caprolactam, or the like. The proportion of the hydroxyl group-containing (meth)acrylate in the radiation-curable resin composition is, for example, 10% by mass or more and 90% by mass or less.

[0041] The number average molecular weight of the radiation-curable compound is, for example, 200 or more and 10,000 or less, may be 1,000 or more and 10,000 or less, or may be 2,000 or more and 10,000 or less. The number average molecular weight is the average molecular weight measured by GPC analysis and converted to standard polystyrene.

[0042] For example, when the radiation-curable compound is an ultraviolet-curable compound, the radiation-curable compound preferably contains at least one of a photoinitiator and a photopolymerization accelerator. Examples of the photoinitiator include acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethyl ketal, benzoyl benzoate, α-acyl oxime ester, acylphosphine oxide, and thioxanthones. Examples of the photopolymerization accelerator include isoamyl p-dimethylaminobenzoate and ethyl p-dimethylaminobenzoate.

[0043] The first protective layer preferably contains a weathering agent. Examples of the weathering agent include an ultraviolet absorber and a light stabilizer. The first protective layer preferably contains at least one of an ultraviolet absorber and a light stabilizer. The first protective layer may contain one or more kinds of ultraviolet absorbers. Similarly, the first protective layer may contain one or more kinds of light stabilizers.

[0044] Examples of the ultraviolet absorber contained in the first protective layer include organic ultraviolet absorbers such as triazine-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, oxybenzophenone-based ultraviolet absorbers, salicylic acid ester-based ultraviolet absorbers, and cyano (meth) acrylate-based ultraviolet absorbers, and inorganic ultraviolet absorbers such as titanium dioxide, cerium oxide, and zinc oxide. Among these, triazine-based ultraviolet absorbers are more preferable.

[0045] Examples of triazine-based ultraviolet absorbers include hydroxyphenyltriazine-based ultraviolet absorbers. Examples of hydroxyphenyltriazine-based ultraviolet absorbers include 2-(2-hydroxy-4-[1-octyloxycarbonylethoxy]phenyl)-4,6-bis(4-phenylphenyl)-1,3,5-triazine, 2-[4-[(2-hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2,4-bis[2-hydroxy-4-butoxyphenyl]-6-(2,4-dibutoxyphenyl)-1,3,5-triazine, 2-[4-[(2-hydroxy-3-tridecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[4-[(2-hydroxy-3-(2'-ethyl)hexyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, and 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5[2-(2-ethylhexanoyloxy)ethoxy]phenol.

[0046] The content of the ultraviolet absorber contained in the first protective layer is, for example, 0.5 parts by mass or more and 10 parts by mass or less, may be 0.8 parts by mass or more and 8 parts by mass or less, or may be 1 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the radiation curable compound. If the content of the ultraviolet absorber is large, bleeding out of the ultraviolet absorber may occur, and if the content of the ultraviolet absorber is small, sufficient ultraviolet absorption performance may not be obtained.

[0047] Examples of the light stabilizer contained in the first protective layer include hindered amine light stabilizers. Examples of the hindered amine light stabilizer include 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis(2,2,6,6-pentamethyl-4-piperidyl) 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-tetramethylpiperidin-4-yl)amino]-6-(2-hydroxyethylamine)-1,3,5-triazine).

[0048] The content of the light stabilizer contained in the first protective layer is, for example, 1 part by mass or more and 10 parts by mass or less, may be 1.5 parts by mass or more and 8 parts by mass or less, or may be 2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the radiation-curable compound. If the content of the light stabilizer is large, bleeding out of the light stabilizer may occur, and if the content of the light stabilizer is small, sufficient light stability may not be obtained.

[0049] The first protective layer may contain additives such as silicone compounds, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifouling agents, defoaming agents, and fillers. Further, the thickness of the first protective layer is, for example, 2 μm or more and 20 μm or less, may be 3 μm or more and 15 μm or less, or may be 4 μm or more and 10 μm or less. If the first protective layer is thin, sufficient weather resistance may not be obtained, and if the first protective layer is thick, cracks are likely to occur in the first protective layer, and good adhesion may not be obtained.

[0050] (ii) The second protective layer In the present disclosure, the transfer layer preferably has a second protective layer on the surface opposite to the release film of the first protective layer. The second protective layer is preferably a layer that is more flexible than the first protective layer. Also, the second protective layer and the first protective layer may be arranged so as to be in direct contact with each other, or may be arranged via another layer.

[0051] The second protective layer preferably contains, as a resin component, a cured product (crosslinked structure) of a curable resin composition. Also, the ratio of the cured product of the curable resin composition may be, for example, 70% by mass or more, may be 90% by mass or more, may be 95% by mass or more, or may be 100% by mass with respect to all the resin components constituting the second protective layer.

[0052] Examples of the curable resin composition used for the second protective layer include a thermosetting resin composition. A thermosetting resin composition is a composition that contains at least a thermosetting resin and cures by heating. Examples of the thermosetting resin include (meth)acrylic resins, phenolic resins, urea-melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. The thermosetting resin composition preferably contains a urethane (meth)acrylic resin as the thermosetting resin. Also, the thermosetting resin composition may further contain a curing agent such as an isocyanate-based curing agent or an epoxy-based curing agent.

[0053] When the curable resin composition contains a urethane (meth)acrylic resin, the urethane (meth)acrylic resin is preferably a urethane (meth)acrylic copolymer, and more preferably a polycarbonate-based urethane (meth)acrylic copolymer. A polycarbonate-based urethane (meth)acrylic copolymer is a resin obtained by radically polymerizing a (meth)acrylic monomer with a polycarbonate-based polyurethane polymer obtained by reacting polycarbonate diol with (di)isocyanate.

[0054] As the isocyanate, for example, aromatic isocyanates such as 4,4'-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 1,5-naphthalene diisocyanate, n-isocyanatophenylsulfonyl isocyanate, o-isocyanatophenylsulfonyl isocyanate, p-isocyanatophenylsulfonyl isocyanate; aliphatic isocyanates such as 1,6-hexamethylene diisocyanate; alicyclic isocyanates such as isophorone diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated diphenylmethane diisocyanate, etc. can be mentioned.

[0055] As the (meth)acrylic monomer, for example, (meth)acrylic acid alkyl esters such as (meth)acrylic acid, methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, etc. can be mentioned.

[0056] In the polycarbonate-based urethane (meth)acrylic copolymer, the mass ratio of the urethane component to the total of the (meth)acrylic component and the urethane component ([urethane component] / ([(meth)acrylic component]+[urethane component])) is, for example, 70% by mass or more and 95% by mass or less, may be 75% by mass or more and 95% by mass or less, or may be 80% by mass or more and 90% by mass or less.

[0057] The second protective layer preferably contains a weathering agent. Examples of the weathering agent include an ultraviolet absorber and a light stabilizer. The second protective layer preferably contains at least one of an ultraviolet absorber and a light stabilizer. Since the preferred types and modes of the weathering agent are the same as those described in the above "(i) The first protective layer", the description here is omitted. In particular, the second protective layer preferably contains a triazine-based ultraviolet absorber. Also, the second protective layer preferably contains a hindered amine-based light stabilizer.

[0058] The content of the ultraviolet absorber contained in the second protective layer is, for example, 0.1 part by mass or more and 50 parts by mass or less, may be 3 parts by mass or more and 40 parts by mass or less, or may be 10 parts by mass or more and 35 parts by mass or less with respect to 100 parts by mass of the resin component. Also, the content of the ultraviolet absorber contained in the second protective layer (content with respect to 100 parts by mass of the resin component) may be more than the content of the ultraviolet absorber contained in the first protective layer (content with respect to 100 parts by mass of the resin component).

[0059] The content of the light stabilizer contained in the second protective layer is, for example, 0.1 part by mass or more and 15 parts by mass or less, may be 1 part by mass or more and 15 parts by mass or less, or may be 3 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the resin component. Also, the content of the light stabilizer contained in the second protective layer (content with respect to 100 parts by mass of the resin component) may be more than the content of the light stabilizer contained in the first protective layer (content with respect to 100 parts by mass of the resin component).

[0060] The second protective layer may contain additives such as silicone compounds, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifouling agents, defoaming agents, fillers, etc. Also, the thickness of the second protective layer is, for example, 2 μm or more and 10 μm or less, may be 3 μm or more and 8 μm or less, or may be 3 μm or more and 5 μm or less. If the second protective layer is thin, the adhesion (especially initial adhesion) with the relatively hard first protective layer may be low. On the other hand, if the second protective layer is thick, the movement of the second protective layer due to heat becomes large, and cracks are likely to occur in the first protective layer.

[0061] (2) Other layers In the transfer layer in the present disclosure, a design layer may or may not be provided on the surface of the protective layer opposite to the release film. By providing the design layer, the design property of the article is improved. The design layer and the protective layer may be arranged so as to be in direct contact, or may be arranged via other layers.

[0062] Examples of the design layer include a solid layer (a layer painted solid with ink) and a pattern layer (a layer printed with ink). The transfer sheet may have, as the design layer, a pattern layer and a solid layer in this order from the release film side. Examples of the pattern (design) in the pattern layer include a wood grain pattern, a stone grain pattern, a sand grain pattern, a tile mosaic pattern, a brick stack pattern, a cloth pattern, a leather grain pattern, geometric figures, characters, symbols, abstract patterns, and floral patterns.

[0063] The design layer usually contains a colorant and a binder resin. Examples of the colorant include inorganic pigments such as carbon black (ink), iron black, titanium white, antimony white, lead yellow, titanium yellow, Indian red, cadmium red, ultramarine blue, cobalt blue; organic pigments (including dyes) such as quinacridone red, isoindolinone yellow, nickel azo complex, phthalocyanine blue, azomethine azo black; metal pigments such as aluminum and brass; and pearl pigments such as titanium dioxide-coated mica and basic lead carbonate.

[0064] Examples of the binder resin include urethane resins, acrylic polyol resins, (meth)acrylic resins, ester resins, amide resins, butyral resins, styrene resins, urethane-acrylic copolymers, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-acrylic copolymers, chlorinated propylene resins, nitrocellulose resins, and cellulose acetate resins.

[0065] The design layer may contain additives such as ultraviolet absorbers, light stabilizers, curing agents, plasticizers, and catalysts, if necessary. The thickness of the design layer is, for example, 0.5 μm or more and 20 μm or less, may be 1 μm or more and 10 μm or less, or may be 2 μm or more and 5 μm or less.

[0066] In the transfer layer in the present disclosure, an adhesive layer may or may not be provided on the surface opposite to the release film of the protective layer. The adhesive layer and the protective layer may be arranged to be in direct contact with each other, or may be arranged via another layer (for example, a design layer). The adhesive layer may contain a component having adhesiveness. Examples of the component having adhesiveness include (meth)acrylic resins, vinyl chloride-vinyl acetate copolymers, vinyl acetate resins, ester resins, epoxy resins, imide resins, and rubber resins.

[0067] The adhesive layer may be a so-called pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer has adhesiveness at room temperature. Examples of the resin contained in the pressure-sensitive adhesive layer include (meth)acrylic resins, vinyl resins, ester resins, urethane resins, amide resins, epoxy resins, rubber resins, and ionomer resins. Further, the adhesive layer may be a so-called heat-sealing layer. The heat-sealing layer exhibits adhesiveness by heat. Examples of the resin contained in the heat-sealing layer include (meth)acrylic resins, urethane resins, olefin resins, ester resins, epoxy resins, urea resins, melamine resins, phenol resins, and vinyl resins. The thickness of the adhesive layer is, for example, 1 μm or more and 30 μm or less.

[0068] (3) Transfer layer The thickness of the transfer layer is, for example, 8 μm or more, and may be 10 μm or more, may be 12 μm or more, or may be 14 μm or more. On the other hand, the thickness of the transfer layer is, for example, 50 μm or less, may be 40 μm or less, or may be 30 μm or less.

[0069] 3. Release film The transfer sheet in the present disclosure has a release film facing the transfer layer.

[0070] The release film is preferably a resin film. Examples of the resin contained in the resin film include ester resins, olefin resins, styrene resins, vinyl resins, (meth)acrylic resins, amide resins, imide resins, and carbonate resins.

[0071] The release film preferably contains an ester resin or an olefin resin. Examples of the ester resin include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and polyethylene terephthalate-isophthalate copolymer. Among these, from the viewpoint that heat shrinkage during the production of the transfer sheet and shrinkage due to irradiation with ionizing radiation are less likely to occur, PET or PBT is preferable, and PET is more preferable.

[0072] Examples of the olefin resin include polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, and ethylene-propylene-butene copolymer. Among these, from the viewpoint that heat shrinkage during the production of the transfer sheet and shrinkage due to irradiation with ionizing radiation are less likely to occur, polypropylene is preferable. Also, the release film may be, for example, paper processed with polypropylene (PP).

[0073] The release film may be a stretched film or an unstretched film. The draw ratio in the machine direction (MD) of the stretched film is, for example, 5 times or more and 30 times or less. The draw ratio in the transverse direction (TD) of the stretched film is, for example, 5 times or more and 30 times or less. Also, the thickness of the release film is, for example, 10 μm or more and 200 μm or less, and may be 15 μm or more and 150 μm or less, or may be 20 μm or more and 100 μm or less.

[0074] The release film may contain a matting agent kneaded therein. Some regions of the kneaded matting agent are usually exposed from the release film. By adding a matting agent to the release film, the peel strength of the release film and the transfer layer can be adjusted. Examples of the matting agent include inorganic particles and organic particles. Examples of the inorganic particles include silica, alumina, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, and kaolin. Examples of the organic particles include acrylic beads, urethane beads, nylon beads, silicone beads, silicone rubber beads, polycarbonate beads, and polyolefin waxes (e.g., polypropylene wax, polyethylene wax). The average particle size of the matting agent is, for example, 1.0 μm or more and 10 μm or less, and may be 2.0 μm or more and 8.0 μm or less. The average particle size of the matting agent refers to D 50 in the particle size distribution measurement (volume basis) by the laser light diffraction method.

[0075] The release film may have a matting layer containing a matting agent on the surface on the transfer layer side. The matting agent used for the matting layer is the same as described above. Further, the matting layer may contain, as a resin component, a cured product (crosslinked structure) of a curable resin composition. Examples of the curable resin composition used for the matting layer include an ionizing radiation curable resin composition and a thermosetting resin composition. Details of the ionizing radiation curable resin composition and the thermosetting resin composition are the same as described above. Further, the matting layer may contain a thermoplastic resin as a resin component. The matting layer may contain additives such as a release agent, an ultraviolet absorber, an infrared absorber, a light stabilizer, a polymerization inhibitor, a crosslinking agent, an antistatic agent, an antioxidant, a leveling agent, a coupling agent, a plasticizer, an antifoaming agent, a filler, a thermal radical generator, and an aluminum chelating agent, if necessary. The thickness of the matting layer is not particularly limited, but is, for example, 0.1 μm or more and 10 μm or less.

[0076] 4. Transfer Sheet The transfer sheet in the present disclosure has a release film (first release film) and a transfer layer. The transfer sheet may have a second release film on the surface of the transfer layer opposite to the release film. For example, when the transfer sheet is manufactured by winding it into a roll shape, the occurrence of blocking can be suppressed. Since the details of the second release film are the same as those described for the first release film above, the description here is omitted. Further, the transfer sheet in the present disclosure is preferably used for wrapping processing. The details of the wrapping processing will be described in "B. Method for manufacturing an article" described later.

[0077] 5. Method for producing a transfer sheet The method for producing the transfer sheet in the present disclosure is not particularly limited. For example, when producing the transfer sheet shown in Fig. 1(a), it is preferable to form a first protective layer 2 on one surface of the release film 1, and then form a second protective layer 3 on the surface of the first protective layer 2 opposite to the release film 1. Further, when producing the transfer sheet shown in Fig. 1(b), it is preferable to form a first protective layer 2 on one surface of the release film 1, then form a second protective layer 3 on the surface of the first protective layer 2 opposite to the release film 1, and then form a design layer 4 on the surface of the second protective layer 3 opposite to the first protective layer 2.

[0078] Examples of the method for forming the first protective layer include a method of coating a composition for forming the first protective layer on the surface of the release film and curing it. Examples of the coating method of the above composition include a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, and a comma coating method. Examples of the curing method include a method of irradiating ionizing radiation such as electron beams and ultraviolet rays.

[0079] As a method for forming the second protective layer, for example, a method of applying a composition for forming the second protective layer on the surface of the first protective layer opposite to the release film and curing it as necessary can be mentioned. Examples of the method of applying the composition include a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, and a comma coating method. Examples of the curing method include heat. Further, as a method for forming the design layer, for example, a method of applying ink containing a colorant, a binder resin, and a solvent on the surface of the second protective layer opposite to the first protective layer can be mentioned.

[0080] B. Method for manufacturing an article The method for manufacturing an article in the present disclosure includes a preparation step of preparing a adherend having a plurality of surfaces and the transfer sheet described above, and a wrapping process step of sequentially laminating the transfer layer in the transfer sheet on the plurality of surfaces of the adherend using a roller.

[0081] FIG. 3 is a schematic cross-sectional view illustrating the wrapping process step in the present disclosure. In FIG. 3, while the adherend 20 is being conveyed along the longitudinal direction D L the transfer layer X in the transfer sheet 10 is sequentially laminated on a plurality of surfaces of the adherend 20 using a plurality of rollers 60 (60a to 60e).

[0082] According to the present disclosure, by using the transfer sheet described above, it is possible to suppress the floating of the transfer sheet at the corner portion, suppress the partial peeling of the release film due to springback, and enable the release film to be peeled off well from the transfer layer.

[0083] 1. Preparation step The preparation step in the present disclosure is a step of preparing a adherend having a plurality of surfaces and the transfer sheet described above. Since the transfer sheet is the same as the content described in the above "A. Transfer sheet", the description here is omitted.

[0084] As an example of the adherend in the present disclosure, a metal member can be mentioned. Since the metal member and the resin contained in the transfer layer are dissimilar materials, the adhesion between the two tends to be low. In this case, the adhesion between the adherend and the transfer layer can be improved by bringing the adherend and the transfer layer into close contact via, for example, an adhesive layer described later. In particular, exterior products (articles for outdoor use) are exposed to harsh environments, so it is desirable that the adhesion between the adherend and the transfer layer is high.

[0085] The metal member is a member containing a single metal or a metal alloy. Examples of the metal used for the metal member include aluminum, iron, steel, and copper. The metal member is preferably an aluminum member. This is because the aluminum member is lightweight and has excellent corrosion resistance, making it useful as an adherend for exterior products (articles for outdoor use). The aluminum member is a member containing aluminum or an aluminum alloy. The aluminum member preferably has an aluminum oxide film on its surface. This is because the corrosion resistance of the aluminum member is improved. Examples of the method for forming the aluminum oxide film include anodizing treatment.

[0086] As another example of the adherend, a resin member can be mentioned. Examples of the resin used for the resin member include polycarbonate-based resins, vinyl chloride-based resins, acrylic-based resins, ester-based resins, styrene-based resins, olefin-based resins, acrylonitrile-butadiene-styrene copolymers (ABS-based resins), phenolic resins, cellulose-based resins, and rubber. Also, as another example of the adherend, a wooden member can be mentioned. Examples of the wooden member include wood veneer, plywood, particle board, and wood fiber board. Examples of the wood used for the wooden member include cedar, cypress, pine, and lauan. Also, as another example of the adherend, a ceramic member can be mentioned. The material of the ceramic member may be ceramics such as glass and porcelain, may be a non-cement ceramic-based material such as gypsum, or may be a non-porcelain ceramic-based material such as ALC (lightweight cellular concrete).

[0087] The shape of the adherend is not particularly limited, and examples thereof include a plate shape, a sheet shape, and a three-dimensional shape. The three-dimensional shape refers to a three-dimensional shape represented by coordinates of the X-axis, Y-axis, and Z-axis. The adherend has a plurality of surfaces. The surface may be a flat surface portion or a curved surface portion.

[0088] 2. Adhesive layer forming step In the adhesive layer forming step in the present disclosure, an adhesive layer is formed on the surface of the transfer layer opposite to the release film, or on the plurality of surfaces of the adherend. The method for manufacturing an article in the present disclosure preferably has an adhesive layer forming step after the preparation step and before the wrapping process described later.

[0089] The adhesive used for the adhesive layer is not particularly limited, and known adhesives can be used. Examples thereof include adhesives such as heat-sensitive adhesives and pressure-sensitive adhesives. Examples of the resin used for the adhesive include acrylic resins, urethane resins, vinyl chloride resins, vinyl acetate resins, ester resins, amide resins, vinyl chloride-vinyl acetate copolymers, and styrene-acrylic copolymers. Further, as the adhesive, a two-component curable polyurethane-based adhesive using an isocyanate compound as a curing agent, and a polyester-based adhesive may be used. Further, the adhesive is preferably a solvent-based adhesive or a polyurethane reactive (PUR-based) adhesive.

[0090] In the adhesive layer forming step, an adhesive layer coating liquid may be coated on the surface of the transfer sheet opposite to the release film of the transfer layer to form an adhesive layer. In this case, there is an advantage that the adhesive layer coating liquid can be uniformly coated on the transfer sheet. On the other hand, in the adhesive layer forming step, an adhesive layer coating liquid may be coated on the plurality of surfaces of the adherend to form an adhesive layer. In this case, there is an advantage that the influence of heat shrinkage of the adhesive is less likely to occur. The thickness of the adhesive layer is not particularly limited, and for example, it is 2 μm or more and 100 μm or less, and may be 2 μm or more and 50 μm or less, or 2 μm or more and 35 μm or less. For example, when the transfer sheet has the adhesive layer described above, the adhesive layer forming step may not be performed.

[0091] 3. Wrapping Process Step The wrapping process step in the present disclosure is a step of sequentially bonding the transfer layer in the transfer sheet to the plurality of surfaces on the adherend using a roller. "Sequentially bonding" means bonding the transfer sheet to one surface of the adherend, and then bonding the transfer sheet to the surface adjacent to the surface to which the transfer sheet has been bonded. Usually, the operation of bonding the transfer sheet to the surface adjacent to the surface to which the transfer sheet has been bonded is repeated. For example, bonding the transfer sheet to the first surface of the adherend, then bonding the transfer sheet to the second surface adjacent to the first surface, and then bonding the transfer sheet to the third surface adjacent to the second surface.

[0092] The plurality of surfaces on the adherend are preferably surfaces that extend in the longitudinal direction of the adherend. In the wrapping process step, a single roller may be used to sequentially bond the transfer sheet to the plurality of surfaces on the adherend, or a plurality of rollers may be used to sequentially bond the transfer sheet to the plurality of surfaces on the adherend. Also, in the wrapping process step, it is preferable to fix the position of the roller and convey the adherend and the transfer sheet.

[0093] As shown in FIG. 3, in the wrapping process step, while conveying the adherend 20 along the longitudinal direction D L it is preferable to sequentially bond the transfer layer X in the transfer sheet 10 to the plurality of surfaces on the adherend 20 using a plurality of rollers 60 (60a to 60e). In the wrapping process step, for one surface on the adherend 20, the transfer layer X in the transfer sheet 10 is bonded using the roller 60, and then continuously, using the roller 60, the transfer layer X in the transfer sheet 10 is bonded to the other surfaces on the adherend 20.

[0094] As shown in FIG. 4(a), the first roller 60a is pressed against the first surface S1 of the adherend 20 via the transfer sheet 10. Thereby, the transfer sheet 10 (transfer layer X) is adhered to the first surface S1 of the adherend 20. Although not particularly shown, it is preferable that the above-described adhesive layer is formed between the adherend and the transfer sheet (transfer layer). In FIG. 4(a), the axial direction A1 of the first roller 60a is the horizontal direction.

[0095] Next, as shown in FIG. 4(b), the first guide rollers 60b and 60b' guide the transfer sheet 10 so as to fold it, and then, as shown in FIG. 4(c), the second rollers 60c and 60c' are pressed against the second surfaces S2 and S2' of the adherend 20 via the transfer sheet 10, respectively. Thereby, the transfer sheet 10 (transfer layer X) is adhered to the second surfaces S2 and S2' of the adherend 20. In FIG. 4(c), the axial directions A2 and A2' of the second rollers 60c and 60c' are the vertical directions.

[0096] Next, as shown in FIG. 4(d), the second guide roller 60d guides the transfer sheet 10 so as to fold it, and then, as shown in FIG. 4(e), the third roller 60e is pressed against the third surface S3 of the adherend 20 via the transfer sheet 10. Thereby, the transfer sheet 10 (transfer layer X) is adhered to the third surface S3 of the adherend 20. In FIG. 4(e), the axial direction A3 of the third roller 60e is the horizontal direction.

[0097] As shown in FIG. 5, the angle from the axial direction A1 of the first roller to the axial direction A2 of the second roller is θ 12 and the angle from the axial direction A1 of the first roller to the axial direction A M up to the first guide roller is θ 1M The above angles (central angles) are angles in the same circumferential direction. In the present disclosure, θ 12 and θ 1M are such that θ 12 > θ 1MIt is preferable to satisfy this condition. This is because by gradually changing the axial direction of each roller along the longitudinal direction of the adherend 20, it is possible to further suppress the occurrence of cracks in the transfer layer when transferring the transfer layer to the adherend.

[0098] As shown in FIG. 5, the angle from the axial direction A2 of the second roller to the axial direction A3 of the third roller is θ 23 is defined as, and the axial direction A from the axial direction A2 of the second roller to the second guide roller N to the angle of is θ 2N is defined as. The above angles (central angles) are angles in the same circumferential direction. In the present disclosure, θ 23 and θ 2N are such that θ 23 > θ 2N It is preferable to satisfy this condition. This is because by gradually changing the axial direction of each roller along the longitudinal direction of the adherend 20, it is possible to further suppress the occurrence of cracks in the transfer layer when transferring the transfer layer to the adherend.

[0099] In the wrapping process, a heated roller may be used. The heating temperature of the roller is, for example, 200°C or lower, and may be 180°C or lower. If the heating temperature is high, the transfer sheet may soften more than necessary. On the other hand, the heating temperature of the roller is, for example, 100°C or higher, may be 110°C or higher, and may be 120°C or higher.

[0100] FIG. 6(a) is a schematic cross-sectional view illustrating a part of the article with a release film according to the present disclosure, and is a schematic cross-sectional view corresponding to the region α in FIG. 4(e). As shown in FIG. 6(a), an article 50 with a release film having at least the transfer sheet 10 and the adherend 20 is obtained by the wrapping process. Further, the article 50 with a release film shown in FIG. 6(a) has an adhesive layer 30 between the transfer sheet 10 and the adherend 20. Further, the article 50 with a release film shown in FIG. 6(a) has the release film 1, the transfer layer X, the adhesive layer 30, and the adherend 20 in this order in the thickness direction D T in this order.

[0101] The method for manufacturing an article in the present disclosure may have a peeling step of peeling a release film from a transfer layer after the wrapping process. As shown in FIG. 6(b), an article 100 having at least a transfer layer X and an adherend 20 is obtained by the peeling step. Further, the article 100 shown in FIG. 6(b) has an adhesive layer 30 between the transfer layer X and the adherend 20. Further, the article 100 shown in FIG. 6(b) has the transfer layer X, the adhesive layer 30, and the adherend 20 in this order in the thickness direction D T therein.

[0102] 3. Article The article in the present disclosure has an adherend having a plurality of surfaces and a transfer layer arranged following the plurality of surfaces. Further, an adhesive layer may be arranged between the adherend and the transfer layer. Further, the article in the present disclosure is used for, for example, building materials. The building materials are used for buildings such as houses, offices, stores, hospitals, clinics, etc. The above article may be an exterior product (an article for outdoor use) or an interior product (an article for indoor use). Specific examples of the article include an outer wall, a roof, a soffit, a louver, a door pocket, a window frame, a door, a door frame, a handrail, a fence, and a drying rack.

[0103] C. Article with Release Film The article with a release film in the present disclosure has an adherend having a plurality of surfaces, a transfer layer arranged following the plurality of surfaces, and a release film arranged following the transfer layer. The loop stiffness of the release film is 0.18 N / 15 mm or less, and the peel strength of the release film and the transfer layer is 0.7 N / 25 mm or less. When the loop stiffness is X and the peel strength is Y, X and Y satisfy Y≧0.67X + 0.17.

[0104] According to the present disclosure, the loop stiffness and the peel strength are within specific ranges, respectively. Further, by satisfying a specific relationship between the loop stiffness and the peel strength, it is possible to suppress the lifting of the transfer sheet at the corner portion, suppress the partial peeling of the release film due to springback, and ensure that the release film can be peeled off well from the transfer layer. Thus, an article with a release film is obtained that achieves both of these effects. Regarding the article with a release film in the present disclosure, since it is the same as the content described in the above "B. Method for manufacturing an article", the description here is omitted.

[0105] The present disclosure is not limited to the above-described embodiments. The above-described embodiments are examples, and any configuration that has substantially the same configuration as the technical idea described in the claims of the present disclosure and exhibits the same operational effects is included in the technical scope of the present disclosure.

Examples

[0106] [Example 1] As a release film, a polyethylene terephthalate film (mat-added, thickness: 26 μm) that has not been subjected to an easy-adhesion treatment and contains a matting agent was prepared. On one surface of the release film, the following composition for forming a first protective layer was coated by gravure coating to form an uncured resin layer. Thereafter, electron beam irradiation was performed at an acceleration voltage of 165 kV with a dose of 50 kGy to cure it, thereby forming a first protective layer with a thickness of 5 μm. Thereafter, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming a first protective layer (EB1)> · Ionizing radiation curable resin composition: 100 parts by mass Caprolactam-based urethane acrylate: 30 parts by mass Pentaerythritol triacrylate (hydroxyl group-containing acrylate): 70 parts by mass · Ultraviolet absorber: 2 parts by mass (product name: TINUVIN 479, BASF) · Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0107] Next, the following composition for forming a second protective layer was applied by gravure coating onto the surface of the corona-irradiated first protective layer, and then dried to form a second protective layer with a thickness of 3.5 μm. <Composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · UV absorber: 17 parts by mass (Product name: TINUVIN 400, manufactured by BASF) · UV absorber: 13 parts by mass (Product name: TINUVIN 479, manufactured by BASF) · Hindered amine light stabilizer: 8 parts by mass (Product name: TINUVIN 123, manufactured by BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle diameter 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0108] Next, the following ink for forming a design layer was applied by gravure coating onto the surface of the obtained second protective layer, and then dried to form a design layer. As a result, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming the design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0109] [Example 2] As a release film, a mirror-finish polyethylene terephthalate film (thickness: 38 μm) without an easy-adhesion treatment was prepared. The following composition for forming a first protective layer was applied by gravure coating onto one surface of the release film to form an uncured resin layer. Thereafter, electron beam irradiation was performed at an acceleration voltage of 165 kV and a dose of 50 kGy to cure it, thereby forming a first protective layer with a thickness of 5 μm. Thereafter, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming the first protective layer (EB2)> · Ionizing radiation curable resin composition: 100 parts by mass Caprolactam-based urethane acrylate: 50 parts by mass Pentaerythritol triacrylate (hydroxyl group-containing acrylate): 50 parts by mass · UV absorber: 2 parts by mass (Product name: TINUVIN 479, BASF) · Light stabilizer having a reactive functional group: 2 parts by mass (Product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0110] Next, the following composition for forming the second protective layer was applied by gravure coating onto the surface of the corona-irradiated first protective layer, dried, and a second protective layer with a thickness of 3.5 μm was formed. <Composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · UV absorber: 17 parts by mass (Product name: TINUVIN 400, BASF) · UV absorber: 13 parts by mass (Product name: TINUVIN 479, BASF) · Hindered amine light stabilizer: 8 parts by mass (Product name: TINUVIN 123, BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle size 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0111] Next, the following ink for forming the design layer was applied by gravure coating onto the surface of the obtained second protective layer, dried, and a design layer was formed. Thus, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming the design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0112] [Example 3] As a release film, a polyethylene terephthalate film (mat coat, thickness: 50 μm) having a mat layer containing a matting agent was prepared. The following composition for forming a first protective layer was applied by gravure coating onto the surface of the release film on the mat layer side to form an uncured resin layer. Thereafter, electron beam irradiation was performed at an acceleration voltage of 165 kV and a dose of 50 kGy to cure it, thereby forming a first protective layer with a thickness of 5 μm. Thereafter, corona irradiation was carried out on the surface of the first protective layer opposite to the release film. <Composition for forming the first protective layer (EB1)> · Ionizing radiation curable resin composition: 100 parts by mass Caprolactam-based urethane acrylate: 30 parts by mass Pentaerythritol triacrylate (hydroxyl group-containing acrylate): 70 parts by mass · Ultraviolet absorber: 2 parts by mass (product name: TINUVIN 479, BASF) · Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0113] Next, the following composition for forming a second protective layer was applied by gravure coating onto the surface of the corona-irradiated first protective layer, dried, thereby forming a second protective layer with a thickness of 3.5 μm. <Composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · Ultraviolet absorber: 17 parts by mass (product name: TINUVIN 400, BASF) · Ultraviolet absorber: 13 parts by mass (product name: TINUVIN 479, BASF) · Hindered amine-based light stabilizer: 8 parts by mass (product name: TINUVIN 123, BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle diameter 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0114] Next, on the surface of the obtained second protective layer, the following ink for forming a design layer was applied by gravure coating and dried to form a design layer. As a result, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming a design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0115] [Example 4] As a release film, a polyethylene terephthalate film (mat-added, thickness: 50 μm) which had not been subjected to an easy adhesion treatment and in which a matting agent was kneaded was prepared. On one surface of the release film, the following composition for forming a first protective layer was applied by gravure coating to form an uncured resin layer. Thereafter, electron beam irradiation was performed at an acceleration voltage of 165 kV with a dose of 50 kGy for curing to form a first protective layer with a thickness of 5 μm. Thereafter, corona irradiation was carried out on the surface of the first protective layer opposite to the release film. <Composition for forming a first protective layer (EB3)> · Ionizing radiation curable resin composition (caprolactam-based urethane acrylate): 100 parts by mass · Ultraviolet absorber: 2 parts by mass (product name: TINUVIN 479, BASF) · Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0116] Next, on the surface of the corona-irradiated first protective layer, the following composition for forming a second protective layer was applied by gravure coating and dried to form a second protective layer with a thickness of 3.5 μm. <Composition for forming a second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · Ultraviolet absorber: 17 parts by mass (product name: TINUVIN 400, BASF) · Ultraviolet absorber: 13 parts by mass (product name: TINUVIN 479, BASF) - Hindered amine light stabilizer: 8 parts by mass (product name: TINUVIN 123, BASF) - Anti-blocking agent: 9 parts by mass (silica particles, average particle size 3 μm) - Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0117] Next, the following ink for forming a design layer was applied by gravure coating onto the surface of the obtained second protective layer and dried to form a design layer. As a result, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming a design layer> - Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass - Pigment

[0118] [Example 5] As a release film, a transfer paper (matte PP, thickness: 75 μm) having a matte polypropylene (PP) layer was prepared. The following composition for forming a first protective layer was applied by gravure coating onto the surface on the PP layer side of the release film to form an uncured resin layer. Then, electron beam irradiation was performed at an acceleration voltage of 165 kV with a dose of 50 kGy to cure it and form a first protective layer with a thickness of 5 μm. Then, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming a first protective layer (EB3)> - Ionizing radiation curable resin composition (caprolactam-based urethane acrylate): 100 parts by mass - Ultraviolet absorber: 2 parts by mass (product name: TINUVIN 479, BASF) - Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0119] Next, the following composition for forming a second protective layer was applied by gravure coating onto the surface of the corona-irradiated first protective layer and dried to form a second protective layer with a thickness of 3.5 μm. <Composition for forming a second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · UV absorber: 17 parts by mass (Product name: TINUVIN 400, BASF) · UV absorber: 13 parts by mass (Product name: TINUVIN 479, BASF) · Hindered amine light stabilizer: 8 parts by mass (Product name: TINUVIN 123, BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle size 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0120] Next, on the surface of the obtained second protective layer, the following ink for forming a design layer was applied by gravure coating and dried to form a design layer. As a result, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming a design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0121] [Comparative Example 1] As a release film, a polyethylene terephthalate film (mat-added, thickness: 50 μm) with a matte agent kneaded in and not subjected to an easy adhesion treatment was prepared. On one surface of the release film, the following composition for forming a first protective layer was applied by gravure coating to form an uncured resin layer. Then, electron beam irradiation was performed at an acceleration voltage of 165 kV with a dose of 50 kGy to cure it and form a first protective layer with a thickness of 5 μm. Then, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming a first protective layer (EB1)> · Ionizing radiation curable resin composition: 100 parts by mass Caprolactam-based urethane acrylate: 30 parts by mass Pentaerythritol triacrylate (hydroxyl group-containing acrylate): 70 parts by mass · UV absorber: 2 parts by mass (Product name: TINUVIN 479, BASF) · Light stabilizer having reactive functional groups: 2 parts by mass (Product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0122] Next, the following composition for forming the second protective layer was applied by gravure coating onto the surface of the corona-irradiated first protective layer and dried to form a second protective layer with a thickness of 3.5 μm. <Composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · UV absorber: 17 parts by mass (Product name: TINUVIN 400, BASF) · UV absorber: 13 parts by mass (Product name: TINUVIN 479, BASF) · Hindered amine light stabilizer: 8 parts by mass (Product name: TINUVIN 123, BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle size 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0123] Next, the following ink for forming the design layer was applied by gravure coating onto the surface of the obtained second protective layer and dried to form a design layer. Thus, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming the design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0124] [Comparative Example 2] As a release film, a mirror-finish polyethylene terephthalate film (thickness: 50 μm) without an easy adhesion treatment was prepared. On one surface of the release film, the following composition for forming a first protective layer was coated by gravure coating to form an uncured resin layer. Thereafter, electron beam irradiation was performed at an acceleration voltage of 165 kV with a dose of 50 kGy to cure it and form a first protective layer with a thickness of 5 μm. Thereafter, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming the first protective layer (EB1)> · Ionizing radiation curable resin composition: 100 parts by mass Caprolactam-based urethane acrylate: 30 parts by mass Pentaerythritol triacrylate (hydroxyl group-containing acrylate): 70 parts by mass · Ultraviolet absorber: 2 parts by mass (product name: TINUVIN 479, BASF) · Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0125] Next, on the surface of the corona-irradiated first protective layer, the following composition for forming a second protective layer was coated by gravure coating, dried, and a second protective layer with a thickness of 3.5 μm was formed. <Composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · Ultraviolet absorber: 17 parts by mass (product name: TINUVIN 400, BASF) · Ultraviolet absorber: 13 parts by mass (product name: TINUVIN 479, BASF) · Hindered amine light stabilizer: 8 parts by mass (product name: TINUVIN 123, BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle size 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0126] Next, on the surface of the obtained second protective layer, the following ink for forming a design layer was applied by gravure coating and dried to form a design layer. As a result, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming a design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0127] [Comparative Example 3] As a release film, a mirror-finish polyethylene terephthalate film (thickness: 75 μm) without an adhesion-improving treatment was prepared. On one surface of the release film, the following composition for forming a first protective layer was applied by gravure coating to form an uncured resin layer. Thereafter, electron beam irradiation was performed at an acceleration voltage of 165 kV and a dose of 50 kGy to cure it, and a first protective layer with a thickness of 5 μm was formed. Thereafter, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming a first protective layer (EB3)> · Ionizing radiation curable resin composition (caprolactam-based urethane acrylate): 100 parts by mass · Ultraviolet absorber: 2 parts by mass (product name: Tinuvin 479, BASF) · Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0128] Next, on the surface of the corona-irradiated first protective layer, the following composition for forming a second protective layer was applied by gravure coating and dried to form a second protective layer with a thickness of 3.5 μm. <Composition for forming a second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · Ultraviolet absorber: 17 parts by mass (product name: Tinuvin 400, BASF) · Ultraviolet absorber: 13 parts by mass (product name: Tinuvin 479, BASF) - Hindered amine light stabilizer: 8 parts by mass (product name: TINUVIN 123, BASF) - Anti-blocking agent: 9 parts by mass (silica particles, average particle size 3 μm) - Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0129] Next, on the surface of the obtained second protective layer, the following ink for forming a design layer was applied by gravure coating and dried to form a design layer. As a result, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming a design layer> - Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass - Pigment

[0130] [Comparative Example 4] As a release film, a polyethylene terephthalate film having a matte layer containing a matting agent (matte coat, thickness: 38 μm) was prepared. On one surface of the release film, the following composition for forming a first protective layer was applied by gravure coating to form an uncured resin layer. Then, electron beam irradiation was performed at an acceleration voltage of 165 kV with a dose of 50 kGy to cure it and form a first protective layer having a thickness of 5 μm. Then, corona irradiation was performed on the surface of the first protective layer opposite to the release film. <Composition for forming a first protective layer (EB1)> - Ionizing radiation curable resin composition: 100 parts by mass Caprolactam-based urethane acrylate: 30 parts by mass Pentaerythritol triacrylate (hydroxyl group-containing acrylate): 70 parts by mass - Ultraviolet absorber: 2 parts by mass (product name: TINUVIN 479, BASF) - Light stabilizer having a reactive functional group: 2 parts by mass (product name: Sanol LS-3410, Nippon Emulsion Co., Ltd.)

[0131] Next, the following composition for forming the second protective layer was applied by gravure coating onto the surface of the corona-irradiated first protective layer, dried, and a second protective layer with a thickness of 3.5 μm was formed. <Composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass · UV absorber: 17 parts by mass (Product name: TINUVIN 400, manufactured by BASF) · UV absorber: 13 parts by mass (Product name: TINUVIN 479, manufactured by BASF) · Hindered amine light stabilizer: 8 parts by mass (Product name: TINUVIN 123, manufactured by BASF) · Anti-blocking agent: 9 parts by mass (silica particles, average particle diameter 3 μm) · Curing agent: 25 parts by mass (hexamethylene diisocyanate)

[0132] Next, the following ink for forming the design layer was applied by gravure coating onto the surface of the obtained second protective layer and dried to form the design layer. Thus, a transfer sheet having a release film, a first protective layer, a second protective layer, and a design layer in this order in the thickness direction was obtained. <Ink for forming the design layer> · Resin composition: 100 parts by mass Acrylic resin: 80 parts by mass Vinyl chloride-vinyl acetate copolymer: 20 parts by mass · Pigment

[0133] [Evaluation] (Measurement of loop stiffness) The loop stiffness of the release film in the transfer sheets obtained in each example and each comparative example was measured. First, the transfer layer was peeled from the transfer sheet to obtain a state of only the release film. Next, the release film was cut into strips with a width of 15 mm and a length of 150 mm to prepare samples. Next, the samples were fixed to a "Loop Stiffness Tester (Model: DR)" manufactured by Toyo Seiki so that the loop length was 60 mm, and a pressure jig was pressed against the samples from the vertical direction. The stress during compression was measured, and the maximum value of the stress was determined as the loop stiffness (RS).

[0134] (Measurement of peel strength) The peel strength of the transfer sheets obtained in each example and each comparative example was measured. First, the transfer sheet was cut into a width of 25 mm, and a double-sided tape was attached to the entire surface of the side of the release film opposite to the transfer layer, and the release film was fixed to a metal plate with a width of 25 mm. Next, a Nichiban-made cellophane tape (registered trademark) with a width of 25 mm was attached to the entire surface of the side of the transfer layer opposite to the release film. Next, using a "Tensilon RTG1250" manufactured by A&D Company, Limited, the peel strength was measured under the conditions of a peel rate of 200 mm / min and a peel angle of 90°. After exceeding the upper yield point, the integral average value of the peel strength from the point reaching the lower yield point load to 20 mm was taken, and the peel strength (N / 25 mm) was calculated. The results are shown in Table 1.

[0135] (Corner lifting, springback, release film peelability) The corner lifting (lifting of the transfer sheet at the corner), springback (partial peeling of the release film due to springback), and release film peelability (release film peelability after the transfer sheet is attached to the adherend) of the transfer sheets obtained in each example and each comparative example were evaluated. First, an aluminum substrate (adherend) having a cross-section of 40 mm × 40 mm and a length of 2 m was prepared. Next, an adhesive was applied to the transfer layer of the transfer sheet (YR117-1 manufactured by Showa Denko Materials, thickness 50 μm), and it was attached to the aluminum substrate using a wrapping machine. Next, the corner lifting, springback, and release film peelability were evaluated according to the following criteria. <Corner lifting> A: The transfer sheet completely followed at the corner. B: The transfer sheet slightly floated from the corner, but it was at a level that did not cause problems in use. C: The transfer sheet largely floated from the corner. <Springback> A: The release film did not float from the transfer layer and followed. B: The release film slightly floated from the end of the transfer sheet, but it was at a level that did not cause problems in use. C: The release film peeled off significantly from the end of the transfer sheet. <Release film peelability> A: The release film peeled off easily. B: Some force was required during peeling, but the release film could be peeled off without leaving any residue on the transfer layer. C: The release film could not be peeled off from the transfer layer, and the release film was damaged.

[0136]

Table 1

[0137]

Table 2

[0138] As shown in Table 1 and Table 2, in Examples 1 to 5, the corner lift, springback, and release film peelability were all good. In contrast, in Comparative Examples 1 to 4, any one of the corner lift, springback, and release film peelability was insufficient. Also, the relationship between the loop stiffness and the peel strength in Examples 1 to 5 and Comparative Examples 1 to 3 is shown in Fig. 7. Note that for Comparative Example 4, since the peel strength was too large, it is not shown in Fig. 7.

[0139] As shown in FIG. 7, when the loop stiffness is X and the peel strength is Y, it was confirmed that springback can be well suppressed when Y≧0.67X + 0.17 is satisfied. In Comparative Example 3, springback can be well suppressed, and the straight line connecting Comparative Example 3 and Example 1 is Y = 0.67X + 0.19 (straight line 1). On the other hand, the straight line with a slope of 0.67 and passing through Comparative Example 1 is Y = 0.67X + 0.14 (straight line 2). Assuming that Y = 0.67X + 0.17 located between straight line 1 and straight line 2 is the boundary, it is speculated that springback can be well suppressed if it is in the range of Y≧0.67X + 0.17. Also, the straight line connecting Example 1 and Example 5 was Y = 2.25X + 0.12. Further, the straight line connecting Example 1 and Example 4 was Y = 2.99X + 0.03. As shown in FIG. 7, it was suggested that corner lifting is likely to occur when the loop stiffness X exceeds 0.18 N / 15 mm, and the peelability decreases when the peel strength Y exceeds 0.7 N / 25 mm.

[0140] Thus, in the present disclosure, for example, the following inventions are provided.

[0141] [1] A transfer sheet, The transfer sheet includes a release film and a transfer layer disposed on one surface of the release film, the loop stiffness of the release film is 0.18 N / 15 mm or less, the peel strength of the release film and the transfer layer is 0.7 N / 25 mm or less, when the loop stiffness is X and the peel strength is Y, the X and the Y satisfy Y≧0.67X + 0.17.

[0142] [2] The transfer sheet according to [1], which is used for wrapping processing.

[0143] [3] The transfer layer has, from the release film side, a first protective layer and a second protective layer in this order in the thickness direction, and is the transfer sheet according to [1] or [2].

[0144] [4] The first protective layer is the transfer sheet according to [3], which contains a cured product of an ionizing radiation curable resin composition.

[0145] [5] The second protective layer is the transfer sheet according to [3] or [4], which contains a cured product of a thermosetting resin composition.

[0146] [6] The first protective layer is the transfer sheet according to any one of [3] to [5], which contains at least one of an ultraviolet absorber and a light stabilizer.

[0147] [7] The second protective layer is the transfer sheet according to any one of [3] to [6], which contains at least one of an ultraviolet absorber and a light stabilizer.

[0148] [8] The transfer layer has a design layer on the surface of the second protective layer opposite to the first protective layer, and is the transfer sheet according to any one of [3] to [7].

[0149] [9] The transfer sheet is the transfer sheet according to any one of [1] to [8], which is used for manufacturing exterior products.

[0150]

[10] A preparation step of preparing an adherend having a plurality of surfaces and the transfer sheet according to any one of [1] to [9]; A wrapping process step of sequentially laminating the transfer layer in the transfer sheet to the plurality of surfaces on the adherend using a roller; A method for manufacturing an article, which has the above steps.

[0151]

[11] The manufacturing method of the above-mentioned article has an adhesive layer forming step of forming an adhesive layer on the surface of the transfer layer on the side opposite to the release film, or on the plurality of surfaces of the adherend, after the above-mentioned preparation step and before the above-mentioned wrapping process, which is the manufacturing method of the article described in

[10] .

[0152]

[12] An adherend having a plurality of surfaces, a transfer layer arranged following the plurality of surfaces, and a release film arranged following the transfer layer. The loop stiffness of the above-mentioned release film is 0.18 N / 15 mm or less. The peel strength of the above-mentioned release film and the transfer layer is 0.7 N / 25 mm or less. When the loop stiffness is X and the peel strength is Y, X and Y satisfy Y ≧ 0.67X + 0.17, an article with a release film.

[0153]

[13] The article with a release film has an adhesive layer between the transfer layer and the adherend, which is the article with a release film described in

[12] .

Explanation of reference numerals

[0154] 1... Release film 2... First protective layer 3... Second protective layer 4... Design layer 10... Transfer sheet 20... Adherend 50... Article with a release film 100... Article

Claims

Claim 1 A transfer sheet, comprising: a release film; and a transfer layer disposed on one surface of the release film; wherein the loop stiffness of the release film is 0.18 N / 15 mm or less; the peel strength of the release film and the transfer layer is 0.7 N / 25 mm or less; wherein, when the loop stiffness is X and the peel strength is Y, X and Y satisfy Y≧0.67X + 0.17.

Images