Foam wall paper and method for manufacturing foam wall paper

Abstract

To provide foam wall paper and a method for manufacturing foam wall paper which can reduce the possibility that curing defects are generated in a pattern layer.SOLUTION: Foam wall paper 1 includes a base material layer 2 which is a non-foam layer, a foaming agent-containing resin layer 3 which contains a foaming agent and is laminated on the base material layer 2, a pattern layer 5 which is laminated on a surface opposite to a surface facing the base material layer 2 of the foaming agent-containing resin layer 3, and a surface protective layer 6 laminated on a surface opposite to a surface facing the foaming agent-containing resin layer 3 of the pattern layer 5, wherein the pattern layer 5 is formed using aqueous inkjet ink, and the surface protective layer 6 is formed using only an acrylic resin.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to foam wallpaper and a method for producing foam wallpaper. [Background technology]

[0002] As an example of wallpaper formed using inkjet printing, there is the wallpaper disclosed in Patent Document 1. The wallpaper disclosed in Patent Document 1 includes a base layer (support reinforcing member), a foaming agent-containing resin layer (a thermoplastic resin layer made from a material in which a heated foaming agent is dispersed), and a pattern layer (an inkjet ink receiving layer). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-150660 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, in wallpapers formed by inkjet printing, including the wallpaper disclosed in Patent Document 1, the pattern layer may be formed using ultraviolet curing ink. In this case, before foaming the foaming agent contained in the foaming agent-containing resin layer, ultraviolet curing ink is applied, and then the foaming agent contained in the foaming agent-containing resin layer is foamed, and ultraviolet rays are irradiated onto the ultraviolet curing ink that forms the pattern layer. However, in a configuration in which the pattern layer is formed using ultraviolet curing ink, when the pattern layer is formed after foaming the foaming agent contained in the foaming agent-containing resin layer, ultraviolet rays are not irradiated onto the pattern layer uniformly, and curing failure may occur. In view of the above-mentioned problems, the present invention aims to provide a foamed wallpaper capable of reducing the possibility of insufficient hardening of the pattern layer, and a method for manufacturing the foamed wallpaper. [Means for solving the problem]

[0005] In order to solve the above problems, one aspect of the present invention is a foamed wallpaper comprising a base layer which is a non-foamed layer, a foaming agent-containing resin layer, a pattern layer, and a surface protective layer. The foaming agent-containing resin layer is a layer containing a foaming agent and laminated on the base layer. The pattern layer is a layer laminated on the surface of the foaming agent-containing resin layer opposite to the surface facing the base layer. The surface protective layer is a layer laminated on the surface of the pattern layer opposite to the surface facing the foaming agent-containing resin layer. The pattern layer is formed using an aqueous inkjet ink. Furthermore, the surface protective layer is formed using only an acrylic resin.

[0006] In order to solve the above problems, one aspect of the present invention is a method for producing foamed wallpaper comprising a base layer which is a non-foamed layer, a foaming agent-containing resin layer, a pattern layer, and a surface protective layer. The foaming agent-containing resin layer is a layer that contains a foaming agent and is laminated on the base layer. The pattern layer is a layer that is laminated on the surface of the foaming agent-containing resin layer opposite to the surface facing the base layer. The surface protective layer is a layer that is laminated on the surface of the pattern layer opposite to the surface facing the foaming agent-containing resin layer. In the method for producing foamed wallpaper, the pattern layer is formed using an aqueous inkjet ink, and the surface protective layer is formed using only an acrylic resin. Effect of the Invention

[0007] According to one aspect of the present invention, it is possible to provide foamed wallpaper and a method for manufacturing foamed wallpaper that can reduce the possibility of poor hardening of the pattern layer. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing a configuration of a foam wallpaper according to a first embodiment. [Diagram 2] FIG. 11 is a cross-sectional view showing a configuration of a foam wallpaper in a modified example of the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present technology will be described with reference to the drawings. In the description of the drawings, the same or similar parts are denoted with the same or similar reference numerals, and duplicated descriptions are omitted. Each drawing is schematic and may differ from the actual one. The embodiments shown below are examples of devices and methods for embodying the technical idea of ​​the present technology, and the technical idea of ​​the present technology is not limited to the devices and methods exemplified in the following embodiments. The technical idea of ​​the present technology can be modified in various ways within the technical scope described in the claims. In addition, the directions of "left and right" and "up and down" in the following description are merely definitions for the convenience of explanation and do not limit the technical idea of ​​the present invention. Therefore, for example, if the paper is rotated 90 degrees, "left and right" and "up and down" are read interchangeably, and of course, if the paper is rotated 180 degrees, "left" becomes "right" and "right" becomes "left".

[0010] First embodiment Hereinafter, the configuration of the foam wallpaper 1 in the first embodiment will be described with reference to FIG.

[0011] As shown in FIG. 1, the foam wallpaper 1 includes a base layer 2, a foaming agent-containing resin layer 3, a primer layer 4, a design layer 5, and a surface protective layer 6. The thickness of the foam wallpaper 1 is, for example, within the range of 100 μm to 710 μm.

[0012] <Base material layer> The base material layer 2 is a non-foamed layer, and is formed using a material that is commonly used as a base material layer, such as backing paper for wallpaper. In the first embodiment, the base material layer 2 has a basis weight of, for example, 50 [g / m 2 ] or more 100[g / m 2 ] or less and the thickness is in the range of 70 [μm] to 100 [μm] (plain paper). That is, the base layer 2 is made of a paper material.

[0013] <Foaming agent-containing resin layer> The foaming agent-containing resin layer 3 is laminated on one surface of the base layer 2 (the upper surface of the base layer 2 in FIG. 1). The foaming agent-containing resin layer 3 is a resin layer formed by using a vinyl chloride resin, and contains a foaming agent.

[0014] Furthermore, the foaming agent-containing resin layer 3 contains at least one of a plasticizer, a viscosity reducer, a stabilizer, a foaming agent, a filler, and titanium oxide. The total thickness of the base layer 2 and the foaming agent-containing resin layer 3 is within the range of 100 μm or more and 520 μm or less, more preferably within the range of 220 μm or more and 450 μm or less, and even more preferably within the range of 250 μm or more and 300 μm or less.

[0015] The foaming agent contained in the foaming agent-containing resin layer 3 may be, for example, a thermally expandable microcapsule foaming agent, an azo type, a hydrazide type, a nitroso type, ADCA (azodicarbonamide foaming agent), sodium hydrogen carbonate, or the like. As the foaming agent, a thermally expandable microcapsule foaming agent is preferred from the viewpoint of performance (foaming ratio, strength).

[0016] When ADCA and sodium bicarbonate are used as the foaming agent, for example, the mixing ratio of ADCA to sodium bicarbonate is set to 3:1 to 1:3, and the total of the two types is mixed within the range of 1 to 4 parts per 100 parts of the vinyl chloride resin. This makes it possible to ensure the foaming ratio and prevent the foam surface from becoming rough. The amount of foaming agent added depends on the thickness and expansion ratio of the foaming agent-containing resin layer 3, but is preferably in the range of 1 part by weight to 20 parts by weight, particularly 5 parts by weight to 15 parts by weight, per 100 parts by weight of resin.

[0017] <Primer layer> The primer layer 4 is laminated on one surface (the upper surface in FIG. 1) of the foaming agent-containing resin layer 3. As a result, the primer layer 4 is disposed between the foaming agent-containing resin layer 3 and the design layer 5. The primer layer 4 is formed containing polyurethane and at least one of a vinyl resin and an acrylic resin. Furthermore, the polyurethane contained in the primer layer 4 and at least one of the vinyl resin and the acrylic resin contained in the primer layer 4 contain amorphous silicon dioxide.

[0018] The thickness of the primer layer 4 is within the range of 1 μm to 30 μm. If the thickness of the primer layer 4 is less than 1 μm, the ink adhesion is reduced. If the thickness of the primer layer 4 is more than 30 μm, the non-flammability is reduced.

[0019] <Pattern layer> The pattern layer 5 is laminated on one surface (the upper surface in FIG. 1) of the primer layer 4, and is a layer for adding a pattern to impart design. That is, the pattern layer 5 is a layer laminated on the surface of the foaming agent-containing resin layer 3 opposite to the surface facing the base material layer 2. The design layer 5 is formed using a water-based inkjet ink.

[0020] The aqueous inkjet ink forming the design layer 5 is applied by, for example, inkjet printing. That is, the design layer 5 is formed by, for example, inkjet printing. Any pattern can be used as the pattern of the pattern layer 5, such as a wood grain pattern, a stone pattern, a fabric pattern, an abstract pattern, a geometric pattern, letters, symbols, a solid color, or a combination thereof. In order to improve the concealment of the foamed wallpaper 1, a concealment layer may be provided between the pattern layer 5 and the foaming agent-containing resin layer 3. The concealment layer is formed, for example, using an opaque printing ink or paint containing a large amount of opaque pigments such as titanium dioxide or iron oxide.

[0021] In addition, the pattern layer 5 may be configured to have, for example, a solid colored base material layer for concealing the color and pattern of the base on which the foamed wallpaper 1 is attached, and a pattern layer for adding a pattern to impart design features. The thickness of the pattern layer 5 is set within the range of 1 [μm] to 10 [μm], preferably within the range of 0.1 [μm] to 10 [μm], more preferably within the range of 0.5 [μm] to 5 [μm], and even more preferably within the range of 0.7 [μm] to 3 [μm]. This is because when the thickness of the pattern layer 5 is 1 [μm] or more, it is possible to make the printing clear. Also, when the thickness of the pattern layer 5 is 10 [μm] or less, it is possible to improve the printing workability when manufacturing the foamed wallpaper 1 and suppress the manufacturing cost.

[0022] In addition, functional additives such as extender pigments, plasticizers, dispersants, surfactants, tackifiers, adhesive aids, drying agents, hardeners, hardening accelerators, and hardening retarders may be added to the design layer 5 in order to impart various functions.

[0023] <Surface protective layer> The surface protective layer 6 is laminated on one surface of the pattern layer 5 (the upper surface in FIG. 1), and is a layer provided to impart functions such as weather resistance, scratch resistance, stain resistance, and design to the foamed wallpaper 1. In other words, the surface protective layer 6 is a layer laminated on the surface of the pattern layer 5 opposite to the surface facing the foaming-agent-containing resin layer 3. The surface protective layer 6 is made of only an acrylic resin. In the first embodiment, as an example, a case will be described in which the acrylic resin forming the surface protection layer 6 contains methyl methacrylate and amorphous silicon dioxide.

[0024] The thickness of the surface protective layer 6 is within the range of 1 μm to 50 μm. If the thickness of the surface protective layer 6 is less than 1 μm, the possibility of cracks occurring in the surface protective layer 6 increases, and the scratch resistance of the surface protective layer 6 decreases. If the thickness of the surface protective layer 6 exceeds 50 μm, the non-flammability decreases. The coating amount of the surface protective layer 6 is 1.0 [g / m 2 dry] or higher. Furthermore, the surface protective layer 6 may contain various additives, such as weathering agents, plasticizers, stabilizers, fillers, dispersants, colorants such as dyes and pigments, solvents, ultraviolet absorbers, heat stabilizers, light stabilizers, antiblocking agents, catalyst scatterers, colorants, light scattering agents, and gloss adjusters, as required. Furthermore, the surface protective layer 6 may contain functional additives, such as antibacterial agents and antifungal agents, as required.

[0025] <The manufacturing method of foam wallpaper> Hereinafter, a method for producing the foam wallpaper 1 will be described with reference to FIG. In the method for producing the foamed wallpaper 1, the pattern layer 5 is formed by inkjet printing using a water-based inkjet ink. Furthermore, the design layer 5 is formed after the foaming agent contained in the foaming agent-containing resin layer 3 is foamed.

[0026] In the manufacturing method of the foamed wallpaper 1, a primer layer 4 is formed between the foaming agent-containing resin layer 3 and the pattern layer 5. The primer layer 4 is formed after foaming the foaming agent contained in the foaming agent-containing resin layer 3. In addition, the primer layer 4 is formed so that its thickness is within the range of 1 μm to 30 μm. Furthermore, in the manufacturing method of the foamed wallpaper 1, the surface protective layer 6 is formed using only an acrylic resin after foaming the foaming agent contained in the foaming-agent-containing resin layer 3. In addition, the surface protective layer 6 is formed so as to have a thickness within the range of 1 μm to 50 μm.

[0027] The above-described first embodiment is one example of the present invention, and the present invention is not limited to the above-described first embodiment. Various modifications can be made depending on the design, etc., even if the modifications are in a form other than the first embodiment, as long as they do not deviate from the technical idea of ​​the present invention.

[0028] (Effects of the First Embodiment) The foam wallpaper 1 of the first embodiment can achieve the effects described below. (1) The sheet comprises a base layer 2 which is a non-foamed layer, a foaming agent-containing resin layer 3 which contains a foaming agent and is laminated on the base layer 2, and a design layer 5 which is laminated on the surface of the primer layer 4 opposite to the surface facing the foaming agent-containing resin layer 3. In addition, the sheet comprises a surface protection layer 6 which is laminated on the surface of the design layer 5 opposite to the surface facing the foaming agent-containing resin layer 3. The design layer 5 is formed using a water-based inkjet ink, and the surface protection layer 6 is formed using only an acrylic resin. As a result, it is possible to provide a foaming wallpaper 1 in which the pattern layer 5 is formed using an aqueous inkjet ink, thereby reducing the possibility of the pattern layer 5 failing to harden. Furthermore, if the surface protective layer 6 and the pattern layer 5 are incompatible, the adhesion between the surface protective layer 6 and the pattern layer 5 will decrease. In contrast, in the foamed wallpaper 1 of the first embodiment, the surface protective layer 6 is formed using only an acrylic resin. This ensures that the surface protective layer 6 is firmly fixed, suppressing the decrease in adhesion between the surface protective layer 6 and the pattern layer 5, and improving the design.

[0029] Also, compared to a configuration in which the pattern layer 5 is formed using a solvent ink, it is possible to reduce the possibility of poor curing of the pattern layer 5, thereby preventing the deterioration of the surface properties of the foamed wallpaper 1 caused by the solvent. Furthermore, compared to a configuration in which the pattern layer 5 is formed using a solvent ink, it is possible to reduce the amount of volatile organic compounds (VOCs) used, thereby reducing the environmental impact. Moreover, compared to a configuration in which the design layer 5 is formed using ultraviolet-curable ink, the adhesion of the surface protection layer 6 can be improved.

[0030] (2) The pattern layer 5 is formed by inkjet printing. As a result, for example, compared to the repeat patterns that are unique to plate printing, inkjet printing alleviates the restrictions on patterns, making it possible to improve design. Furthermore, the manufacturing method of the foamed wallpaper 1 of the first embodiment makes it possible to achieve the effects described below.

[0031] (3) The design layer 5 is formed using a water-based inkjet ink, and the surface protection layer 6 is formed using only an acrylic resin. As a result, by forming the pattern layer 5 using an aqueous inkjet ink, it is possible to provide a foamed wallpaper 1 that can reduce the possibility of poor curing of the pattern layer 5. In addition, the surface protective layer 6 is reliably fixed, and a decrease in adhesion between the surface protective layer 6 and the pattern layer 5 is suppressed, thereby improving the design.

[0032] (4) The design layer 5 is formed after the foaming agent contained in the foaming agent-containing resin layer 3 is foamed. As a result, since the design layer 5 is formed by inkjet printing or the like after the foaming agent contained in the foaming agent-containing resin layer 3 is foamed, it becomes possible to efficiently apply ink to the recesses formed in the foaming agent-containing resin layer 3. In contrast, in plate printing such as gravure printing, a state in which it is difficult for ink to adhere to the recesses formed in the foaming agent-containing resin layer 3 may occur.

[0033] Furthermore, if the ink forming the pattern layer 5 is applied before the foaming agent contained in the foaming agent-containing resin layer 3 is foamed, and then the foaming agent contained in the foaming agent-containing resin layer 3 is foamed, the ink is stretched and cracked when the foaming agent is foamed, resulting in a decrease in design. In contrast, in the manufacturing method of the foamed wallpaper 1 of the first embodiment, the pattern layer 5 is formed by inkjet printing or the like after the foaming agent contained in the foaming agent-containing resin layer 3 is foamed. This makes it possible to suppress stretching and cracking that occurs in the ink forming the pattern layer 5, and thus to suppress a decrease in design.

[0034] (5) The design layer 5 is formed by inkjet printing. As a result, for example, compared to the repeat patterns that are unique to plate printing, inkjet printing alleviates the restrictions on patterns, making it possible to improve design.

[0035] <Modification of the first embodiment> (1) In the first embodiment, the foaming wallpaper 1 is configured to include the base layer 2, the foaming agent-containing resin layer 3, the primer layer 4, the pattern layer 5, and the surface protective layer 6, but is not limited thereto. That is, the foaming wallpaper 1 may be configured to include the base layer 2, the foaming agent-containing resin layer 3, the primer layer 4, and the pattern layer 5, as shown in FIG. 2, that is, may not include the surface protective layer 6. EXAMPLES

[0036] With reference to the first embodiment, the foamed wallpaper of Example 1 and the foamed wallpapers of Comparative Examples 1 and 2 will be described below.

[0037] Example 1 The base layer has a basis weight of 65 [g / cm 2 ] and was formed using plain paper (manufactured by Nippon Paper Industries Co., Ltd.) having a thickness of 110 [μm]. The foaming agent-containing resin layer was formed using a vinyl chloride resin (manufactured by Tosoh Corporation) with a thickness of 220 μm.

[0038] Thereafter, the laminate of the base material layer and the foaming agent-containing resin layer was placed in a hot air oven and heated at a temperature of 210° C. for 25 seconds to foam the foaming agent contained in the foaming agent-containing resin layer. Further, mechanical embossing was performed using an embossing plate to form a laminate of the base material layer and the foaming agent-containing resin layer. Next, a primer layer was formed by coating an acrylic acid-ester copolymer resin (manufactured by Nissin Chemical Co., Ltd.) to a thickness of 10 μm, then placing it in a hot air oven and drying it at 140°C for 10 minutes.

[0039] The design layer was formed by applying a water-based inkjet ink "LIOJET" (manufactured by Toyo Ink Co., Ltd.) to one surface of the primer layer by inkjet printing. The surface protection layer was made of acrylic resin (manufactured by Toyo Ink Co., Ltd.), which was placed in a hot air oven and dried at 140°C for 10 minutes to a coating weight of 3.0 g / m 2 ] was formed. In this manner, the foamed wallpaper of Example 1 was formed.

[0040] Comparative Example 1 The amount of surface protection layer applied is 1.0 [g / m 2 A foamed wallpaper of Comparative Example 1 was formed in the same manner as in Example 1, except that the foamed wallpaper was formed as follows:

[0041] Comparative Example 2 A foamed wallpaper of Comparative Example 2 was formed in the same manner as in Example 1, except that the surface protective layer was formed using a urethane-based resin in addition to the acrylic resin.

[0042] (Performance evaluation, evaluation results) The foamed wallpaper of Example 1 and the foamed wallpapers of Comparative Examples 1 and 2 were evaluated for adhesion. The following method was used as the evaluation method.

[0043] <Adhesion> An adhesion test was conducted by attaching samples of the examples and the comparative examples to the foamed wallpaper with tape, and the adhesion between the ink forming the pattern layer and the surface protective layer was evaluated. Then, samples in which there was no damage to the ink or the surface protective layer in the pattern where the tape was attached were evaluated as "good", and samples in which there was damage to the ink or the surface protective layer in the pattern where the tape was attached were evaluated as "poor". [Table 1]

[0044] As a result of evaluating various performances using the above-mentioned method, the foamed wallpaper of Example 1 showed excellent performance in terms of adhesion. On the other hand, the foamed wallpapers of Comparative Examples 1 and 2 were unable to show excellent performance in terms of adhesion.

[0045] The present technology can be configured as follows. (1) The laminated sheet is provided with a base layer which is a non-foamed layer, a foaming agent-containing resin layer which contains a foaming agent and is laminated on the base layer, a design layer which is laminated on a surface of the foaming agent-containing resin layer opposite to a surface facing the base layer, and a surface protective layer which is laminated on a surface of the design layer opposite to a surface facing the foaming agent-containing resin layer, The design layer is formed using a water-based inkjet ink, The surface protective layer is formed using only an acrylic resin. (2) The coating amount of the surface protective layer is 1.0 g / m 2 The foamed wallpaper according to (1) above, which is dry or higher. (3) The foam wallpaper according to (1) or (2) above, further comprising a primer layer disposed between the foaming agent-containing resin layer and the pattern layer. (4) The foam wallpaper according to any one of (1) to (3) above, wherein the base layer is formed using a paper material. (5) The foam wallpaper according to any one of (1) to (4), wherein the pattern layer is formed by inkjet printing. (6) The foamed wallpaper according to any one of (1) to (5) above, wherein the foaming agent-containing resin layer is formed using a vinyl chloride resin. (7) The foamed wallpaper according to any one of (1) to (6), wherein the foaming agent-containing resin layer contains at least one of a plasticizer, a viscosity reducer, a stabilizer, a foaming agent, a filler, and titanium oxide. (8) The foam wallpaper according to any one of (1) to (7), wherein the acrylic resin forming the surface protective layer contains methyl methacrylate. (9) The foamed wallpaper according to any one of (1) to (8), wherein the acrylic resin forming the surface protective layer contains amorphous silicon dioxide. (10) The foamed wallpaper according to any one of (1) to (9) above, wherein the thickness of the surface protective layer is within the range of 1 μm to 50 μm. (11) A method for producing foamed wallpaper comprising: a base layer which is a non-foamed layer; a foaming agent-containing resin layer which contains a foaming agent and is laminated on the base layer; a design layer which is laminated on a surface of the foaming agent-containing resin layer opposite to a surface facing the base layer; and a surface protective layer which is laminated on a surface of the design layer opposite to a surface facing the foaming agent-containing resin layer, The design layer is formed using a water-based inkjet ink, A method for producing foam wallpaper, wherein the surface protective layer is formed using only an acrylic resin. (12) The method for producing foamed wallpaper according to (11) above, wherein the pattern layer and the surface protective layer are formed after foaming the foaming agent contained in the foaming agent-containing resin layer. (13) The method for producing foamed wallpaper according to (11) or (12), further comprising forming a primer layer between the foaming agent-containing resin layer and the pattern layer. (14) The method for producing foamed wallpaper according to (13) above, wherein the primer layer is formed after foaming the foaming agent contained in the foaming agent-containing resin layer. (15) The method for producing foamed wallpaper according to any one of (11) to (14), wherein the pattern layer is formed by inkjet printing. [Explanation of symbols]

[0046] 1...foamed wallpaper, 2...base material layer, 3...foaming agent-containing resin layer, 4...primer layer, 5...pattern layer, 6...surface protection layer

Claims

1. The laminated sheet is provided with a base layer which is a non-foamed layer, a foaming agent-containing resin layer which contains a foaming agent and is laminated on the base layer, a design layer which is laminated on a surface of the foaming agent-containing resin layer opposite to a surface facing the base layer, and a surface protective layer which is laminated on a surface of the design layer opposite to a surface facing the foaming agent-containing resin layer, The design layer is formed using a water-based inkjet ink, The surface protective layer is formed using only an acrylic resin.

2. The coating amount of the surface protective layer is 1.0 g / m ２ 2. The foamed wallpaper according to claim 1, which is dry or more.

3. The foam wallpaper according to claim 1, further comprising a primer layer disposed between the foaming agent-containing resin layer and the design layer.

4. The foam wallpaper according to claim 1 , wherein the base layer is made of a paper material.

5. The foam wallpaper according to claim 1, wherein the pattern layer is formed by inkjet printing.

6. 2. The foam wallpaper according to claim 1, wherein the foaming agent-containing resin layer is formed using a vinyl chloride resin.

7. The foam wallpaper according to claim 1, wherein the foaming agent-containing resin layer contains at least one of a plasticizer, a viscosity reducer, a stabilizer, a foaming agent, a filler, and titanium oxide.

8. The foam wallpaper according to claim 1 , wherein the acrylic resin forming the surface protective layer contains methyl methacrylate.

9. The foam wallpaper according to claim 1, wherein the acrylic resin forming the surface protective layer contains amorphous silicon dioxide.

10. 2. The foam wallpaper according to claim 1, wherein the thickness of the surface protective layer is within a range of 1 μm to 50 μm.

11. A method for producing foamed wallpaper comprising: a base layer which is a non-foamed layer; a foaming agent-containing resin layer which contains a foaming agent and is laminated on the base layer; a design layer which is laminated on a surface of the foaming agent-containing resin layer opposite to a surface facing the base layer; and a surface protective layer which is laminated on a surface of the design layer opposite to a surface facing the foaming agent-containing resin layer, The design layer is formed using a water-based inkjet ink, A method for producing foam wallpaper, wherein the surface protective layer is formed using only an acrylic resin.

12. The method for producing foamed wallpaper according to claim 11, wherein the pattern layer and the surface protective layer are formed after foaming the foaming agent contained in the foaming agent-containing resin layer.

13. The method for producing foamed wallpaper according to claim 11, further comprising forming a primer layer between the foaming agent-containing resin layer and the design layer.

14. The method for producing foamed wallpaper according to claim 13, wherein the primer layer is formed after foaming the foaming agent contained in the foaming agent-containing resin layer.

15. The method for producing foamed wallpaper according to claim 11, wherein the pattern layer is formed by inkjet printing.

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