JP7635507B2 - Wallpaper and its manufacturing method - Google Patents

Description

This invention relates to environmentally friendly wallpaper that is highly resistant to stains and scratches, and to a method for producing the same.

Conventionally, a stain-resistant wallpaper has been known in which a film made of a crystalline polymer obtained by saponifying a random copolymer of ethylene and vinyl acetate is laminated onto a substrate to form a coating (see Patent Document 1, p. 7, lines 3-10 and figure 4).

Further, conventionally, wallpaper has been known in which a foamed resin layer made of an olefin-based thermoplastic resin, a pattern layer, and a surface layer made of a nylon resin are laminated in this order on a base layer, and a textured pattern is applied from the surface layer side to the foamed resin layer (see paragraph [0013] and FIG. 1 of Patent Document 2).
Furthermore, as an example of the olefin-based thermoplastic resin forming the conventional foamed resin layer, an ethylene-vinyl acetate copolymer is given (see paragraph [0015] of Patent Document 2).

Conventionally, wallpaper that blocks volatile harmful substances has been known, which is formed by sequentially laminating a vapor-deposited thin film layer made of an inorganic oxide and a gas barrier coating layer on a paper substrate, and then forming a surface material made of polyvinyl chloride or foamed polyvinyl chloride on the gas barrier coating layer via an adhesive layer (see paragraph [0018] and Figure 1 of Patent Document 3).

Japanese Utility Model Application Publication No. 59-172797 JP 2002-52665 A JP 2005-171446 A

Among the above-mentioned conventional wallpapers, there are those which have a nylon film layer or an ethylene-vinyl alcohol copolymer film layer on the surface of a foamed resin layer.
These materials can be wiped clean with water or mild detergent and are also highly scratch-resistant, so they are used in a wide range of residential spaces, such as entrance halls, kitchens, and washrooms, which are prone to getting dirty.
Furthermore, in typical homes, wallpaper made from a foamed resin layer has high gas permeability, which means that volatile harmful substances such as adhesives used on the base material, such as wood-based substrates on the wall, as well as monomers released from the adhesives, residual solvents, and chemical substances, can permeate into the living space. However, wallpaper with an ethylene-vinyl alcohol copolymer film layer is able to solve these problems thanks to its high gas barrier properties.

However, currently, only PVC-based wallpapers having an ethylene-vinyl alcohol copolymer film layer are available.
PVC wallpaper, the main material of which is PVC, produces chlorine gas that is toxic to the environment and human body when burned, so in recent years there has been an increasing demand for non-PVC wallpaper.
However, due to the poor adhesion between the non-PVC resin and the ethylene-vinyl alcohol copolymer film layer, not only is sufficient adhesion strength not achieved, but there are also issues such as a lack of design appeal for the embossed pattern, and such wallpaper does not currently exist on the market.
In addition, wallpaper with a nylon film layer generates hydrogen cyanide during incomplete combustion, so in the event of a fire in a closed space such as an indoor space, it can cause not only carbon monoxide poisoning but also cyanide poisoning, which can become severe.

Therefore, one aspect of the present invention aims to solve the above problems by providing environmentally friendly wallpaper that is highly resistant to stains and scratches, and a method for producing the same.

One aspect of the present invention provides wallpaper comprising a paper base material, a foamed resin layer containing at least a resin component, a foaming agent, and a filler, a design layer having a printed design, and a surface film layer made of an ethylene-vinyl alcohol copolymer, laminated in that order, wherein the foamed resin layer uses a non-PVC resin containing at least one of an ethylene-vinyl acetate copolymer and an ethylene-unsaturated carboxylic acid copolymer, and the basis weight of the foamed resin layer is set to between ⁸⁰ g/ ^m2 and 100 g/m2.

In addition, the wallpaper according to one aspect of the present invention is characterized in that the basis weight of the paper base material is set to 50 g/m ² or more and 70 g/m ² or less.
The wallpaper according to one aspect of the present invention is characterized in that the foaming agent is added in an amount of 5 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of a resin component of the foamed resin layer.

The method for manufacturing wallpaper according to one aspect of the present invention is characterized in that a paper base material, a foamed resin layer containing at least a resin component, a foaming agent, and a filler, a pattern layer having a printed pattern, and a surface film layer of an ethylene-vinyl alcohol copolymer are sequentially laminated, and immediately after the foamed resin layer is heated and foamed, a film is laminated onto the surface of the pattern layer while applying a constant temperature and a predetermined pressure, and then the surface film layer is formed by cooling.

A method for producing wallpaper according to one aspect of the present invention is characterized in that a non-PVC resin containing at least one of an ethylene-vinyl acetate copolymer and an ethylene-unsaturated carboxylic acid copolymer is used for the foamed resin layer, and the basis weight of the foamed resin layer is set to be 80 g/ ^m2 or more and 100 g/ ^m2 or less.

According to one aspect of the present invention, it is possible to provide environmentally friendly wallpaper that is highly resistant to stains and scratches, and a method for producing the same.

FIG. 2 is a cross-sectional view of the wallpaper according to the first embodiment.

(Wallpaper 10)
In Fig. 1, reference numeral 10 denotes wallpaper 10, which has a surface film layer 14 of an ethylene-vinyl alcohol copolymer on the surface of a non-PVC foamed resin layer 12. The wallpaper 10 can be cleaned with a damp cloth or a neutral detergent, and is also highly scratch-resistant, so that it can be used in a wide range of residential spaces, such as entrance halls, kitchens, and washrooms, which tend to get dirty easily.

The wallpaper 10 has a layer structure as follows, which is four layers.
The following items (1) to (4) will be described later.
(1) Paper base material 11
(2) Foamed resin layer 12
(3) Picture layer 13
(4) Surface film layer 14
The layer structure of the wallpaper 10 is not limited to the above-mentioned (1) to (4), and an embossed pattern 15 constituting a concave-convex pattern may be formed on the surface of the wallpaper 10. In addition, an anchor coat layer (not shown) may be provided between the design layer 13 and the surface film layer 14.

(Paper base material 11)
The paper base material 11 is not particularly limited and may be any material that is normally used as a paper base material, such as backing paper for wallpaper, etc. For example, it is possible to use flame-retardant paper made mainly of pulp impregnated with a water-soluble flame retardant, inorganic paper mixed with an inorganic agent, etc.
The weight of the backing paper is set to 50 g/m ² or more and 70 g/m ² or less in order to impart non-flammability while maintaining the strength of the wallpaper 10.

(Foamed resin layer 12)
The foamed resin layer 12 is non-vinyl chloride type and is laminated on the paper base material 11 .
The foamed resin layer 12 contains a resin component, a filler, a foaming agent, a foaming assistant, a resin component, and additives. The foamed resin layer 12 is formed by foaming the foaming agent.
The basis weight of the foamed resin layer 12 is set to 80 g/m ² or more and 100 g/m ² or less. This is to impart flame retardancy while maintaining design.
As the resin component of the foamed resin layer 12, a non-vinyl chloride resin containing at least one of an ethylene-vinyl acetate copolymer and an ethylene-unsaturated carboxylic acid copolymer is used.

The content of the monomer other than ethylene contained in the ethylene copolymer is, for example, preferably in the range of 5% by mass to 25% by mass, more preferably in the range of 9% by mass to 20% by mass. By adopting such a copolymerization ratio, it is possible to improve the extrusion film formability.
Specifically, the copolymerization ratio of vinyl acetate (VA amount) of an ethylene-vinyl acetate copolymer is preferably in the range of 9% by mass to 25% by mass, more preferably in the range of 9% by mass to 20% by mass, and the copolymerization ratio of methyl methacrylate (MMA amount) of an ethylene-methyl methacrylate copolymer is preferably in the range of 5% by mass to 25% by mass, more preferably in the range of 5% by mass to 15% by mass.
In addition, the copolymerization ratio of acrylic acid (MAA amount) of the ethylene-methacrylic acid copolymer is preferably in the range of 2% by mass to 15% by mass, more preferably in the range of 5% by mass to 11% by mass.

(Filler)
As the filler, for example, an inorganic filler can be used.
The inorganic filler may be used alone or in combination of two or more kinds. Examples of the inorganic filler that may be used include calcium carbonate, titanium dioxide, kaolin, etc.
The content of the filler is preferably 60 parts by mass or more and 120 parts by mass or less per 100 parts by mass of the resin component of the resin layer. By adding the filler in this range, the combustion calories per unit area are reduced, and the non-flammability of the wallpaper 10 is further improved.

(Foaming Agent)
The foaming agent is a volatile expanding agent, and is preferably added to the resin component of the resin layer in the form of a thermally expandable microcapsule, encapsulated in a shell made of either a polymer having two or more kinds of nitrile monomers as constituent units, or a polymer having two or more kinds of nitrile monomers and a non-nitrile monomer as constituent units, from the viewpoint of performance (expansion ratio, strength). Other usable foaming agents include azo-based, hydrazide-based, nitroso-based, etc.
The foaming agent is preferably used in an amount of 1 to 20 parts by weight, more preferably 5 to 15 parts by weight, per 100 parts by weight of resin. Although even 1 part by weight will function as wallpaper, the foamed resin layer will be insufficiently thick, resulting in insufficient embossing and poor design, so it is preferable to add 5 parts by weight or more.

(pigments, etc.)
The resin layer may be colored as required by adding a pigment, etc. Examples of the pigment that can be used include inorganic pigments such as iron oxide and carbon black, and organic pigments such as aniline black and phthalocyanine blue.
The amount of pigment added is preferably 5% by mass or more and 50% by mass or less, and more preferably 10% by mass or more and 30% by mass or less, based on the total amount of the resin layer, if it is an inorganic pigment, and preferably 10% by mass or less and more preferably 5% by mass or less, if it is an organic pigment.

(Resin composition)
If necessary, well-known additives such as flame retardants, cell regulators, stabilizers, and lubricants can be used in the resin composition.
As the flame retardant, for example, metal oxide flame retardants such as magnesium hydroxide and aluminum hydroxide, phosphorus-based flame retardants such as phosphate esters, bromine-based flame retardants such as tetrabromobisphenol A, and the like can be used.

(Pattern layer 13)
The pattern layer 13 is laminated on the foamed resin layer 12. The pattern layer 13 is formed to improve the design of the foamed wallpaper by decorating the surface side with a pattern such as a wood grain pattern.
The design layer 13 is made of a coating film formed by printing on the surface of the resin layer 2 .
The design layer 13 is not particularly limited as long as it satisfies the requirements for light resistance, color development, and safety of the components used (e.g., not containing heavy metals or sulfur compounds as pigments or additives) that are generally required for wallpaper 10, but it is particularly preferable that the design layer 13 be a water-based ink that uses an acrylic polymer as a base resin.

(Anchor coat layer)
The anchor coat layer, not shown, is provided between the design layer 13 and the surface film layer 14 to improve the adhesion between the foamed resin layer 12 and the surface film layer 14. For the anchor coat layer, for example, an ink regulator based on an acrylic polymer or an acrylic coating agent is used.

(Surface film layer 14)
The surface film layer 14 is an ethylene-vinyl alcohol copolymer, and is laminated on the pattern layer 13. The surface film layer 14 has high gas barrier properties, preventing harmful substances such as VOCs generated from housing base materials from entering the room, and does not absorb odors from daily life in the room, resulting in wallpaper 10 that is kind to not only the environment but also to humans.

(Embossed pattern 15)
The embossed pattern 15 is formed on the surface of the wallpaper 10 and constitutes a concave-convex pattern.

(Production method)
The wallpaper 10 having the above-mentioned structure is formed by laminating in this order the paper base material 11, the foamed resin layer 12, and the pattern layer 13. An anchor coat layer (not shown) may be provided on the surface of the pattern layer 13.
Immediately after the foamed resin layer 12 is heated and foamed, when the embossed pattern 15 is imparted by applying pressure with an embossing roll, a film is laminated onto the surface of the design layer 13 or the anchor coat layer while applying a constant temperature and a predetermined pressure.
Thereafter, by cooling, the surface film layer 14 and the embossed pattern 15 are formed on the surface of the design layer 13 or the anchor coat layer, thereby producing the wallpaper 10.
The pressure during embossing is within the range of 9,800 N/m to 24,500 N/m, and if possible, within the range of 14,700 N/m to 19,600 N/m.

(Actions and Effects of the Embodiments)
According to the wallpaper 10 of the embodiment, by having a surface film layer 14 of an ethylene-vinyl alcohol copolymer on the surface of the non-PVC foamed resin layer 12, it is possible to provide wallpaper that does not generate toxic gases when burned.

Furthermore, the wallpaper 10 according to the embodiment is not only resistant to dirt and scratches, but also prevents the adhesion of odorous components and the penetration of harmful substances generated from construction materials.
Furthermore, according to the wallpaper 10 of this embodiment, by setting the basis weight of the foamed resin layer 12 to be 80 g/m ² or more and 100 g/m ² or less, it is possible to impart noncombustibility and maintain design properties.

According to the wallpaper 10 of this embodiment, by setting the basis weight of the paper base material 11 to be 50 g/m ² or more and 70 g/m ² or less, it is possible to impart non-flammability while maintaining the strength of the wallpaper 10.
According to the wallpaper 10 of this embodiment, the amount of foaming agent added is 5 parts by mass or more and 20 parts by mass or less per 100 parts by mass of the resin component of the foamed resin layer 12, so that a preferable thickness and design can be imparted.

According to the manufacturing method of the wallpaper 10 of the embodiment, it is possible to obtain wallpaper 10 in which the surface film layer 14 is in close contact with the underlying foamed resin layer 12. Moreover, compared to a manufacturing method in which the surface film layer 14 is extruded, it is possible to obtain wallpaper 10 having a more uniform surface film layer 14.
Furthermore, according to the manufacturing method for wallpaper 10 of the embodiment, by using an ethylene-vinyl alcohol copolymer film for the surface film layer 14, it is possible to obtain wallpaper that is not only resistant to dirt and scratches, but also prevents the adhesion of odorous components and the penetration of harmful substances generated from structural materials.

Below, we will explain Examples 1 to 3 of wallpaper according to the first embodiment of the present invention, and Comparative Examples 1 to 6. Note that the present invention is not limited to the following Examples 1 to 3.

Example 1
The layer structure and manufacturing method of Example 1 are as follows.
(1) Paper Base The paper base is wallpaper backing paper (fibrous sheet) with a basis weight of 65 g/ ^m2 .
(2) Foamed Resin Layer The foamed resin layer is formed by applying a paste of 90 parts of a filler (calcium carbonate) and 10 parts of a capsule foaming agent to 100 parts by mass (hereinafter, for simplicity, referred to as "parts") of an EVA resin base by a coating method, and has a basis weight of 80 g/ ^m2 .
(3) Design Layer The design layer is formed by gravure printing using acrylic resin-based ink and has a basis weight of 2 g/ ^m2 .

(4) Anchor Coat Layer The anchor coat layer is formed by forming an acrylic resin-based coating agent on the printed pattern and applying it by gravure printing so that the basis weight after drying is 5 g/ ^m2 .
(5) Manufacturing Method Immediately after heating and foaming, an ethylene-vinyl alcohol copolymer film (HF-ME12, manufactured by Kuraray Co., Ltd.) is laminated when an embossed pattern is imparted by applying pressure with an embossing roll, and then the mixture is cooled to form a surface film layer.

(Examples 2 to 3, Comparative Examples 1 to 2)
The foamed resin layer had different basis weights in Examples 2 and 3 and Comparative Examples 1 and 2. The other factors were the same as those in Example 1.
Example 2
In Example 2, the foamed resin layer has a basis weight of 90 g/m ² , which is increased from 80 g/m ² in Example 1.
Example 3
In Example 3, the foamed resin layer has a basis weight of 100 g/m ² , which is increased from 80 g/m ² in Example 1.

(Comparative Example 1)
In Comparative Example 1, the foamed resin layer has a basis weight of 70 g/m ² , which is reduced from that of Example 1, which is 80 g/m ² .
(Comparative Example 2)
In Comparative Example 2, the foamed resin layer has a basis weight of 110 g/m ² , which is increased from 100 g/m ² in Example 3.

(Comparative Example 3)
In Comparative Example 3, the surface film layer was changed to a 15 μm PVDC coated ONY.
(Manufactured by Unitika Ltd.: "EMBLEM" (registered trademark) DCR15)
(Comparative Example 4)
In Comparative Example 4, the surface film layer was changed to 15 μm ONY (Santonil SNR, manufactured by Mitsubishi Chemical Corporation).

(Comparative Example 5)
In Comparative Example 5, the surface film layer was changed to a 20 μm OPP.
(Toyobo Co., Ltd.: Pylen Film SL P3162)
(Comparative Example 6)
In Comparative Example 6, the surface film layer was changed to 19 μm PET.
(Toyobo Co., Ltd.: Toyobo Ester Film E5101)

(Evaluation method, evaluation criteria)
There are six types of evaluation methods, i.e., physical property evaluation, for wall materials:
(1) Film adhesion (2) Design (3) Gas barrier properties (oxygen permeability)
(4) Scratch resistance (5) Environment (6) Nonflammability

(Film adhesion)
The film adhesion was measured by measuring the adhesion strength of the surface film layer using a Tensilon universal material testing machine.
The film adhesion was evaluated according to the following three-level scale of "◯", "△", and "×", with "◯" being evaluated as passing and the other "△" and "×" being failing.
◯: Adhesion strength 0.5 kgf/25 mm or more, or material breakage △: Adhesion strength 0.3 to 0.5 kgf/25 mm or more ×: Adhesion strength 0.3 kgf/25 mm or less

(Design)
The design was evaluated by observing the height difference of the embossed bumps on the cross section of the wallpaper using a microscope.
The design was evaluated based on the following three-level scale: "○", "△", and "×". "○" was evaluated as passing, and the other three, "△" and "×", were evaluated as failing.
○: Emboss height difference is 30 to 60 μm
△: Emboss height difference is 20 to 30 μm
×: Measurement not possible due to insufficient film adhesion

(Gas barrier properties (oxygen permeability))
The gas barrier property was evaluated by measuring the oxygen transmission rate at 25° C. and 50% RH.
The measured oxygen permeability values are also shown in the lower part of Table 1.
The gas barrier properties were evaluated based on the following three-level scale: "○", "×", and "-". "○" was evaluated as passing, and the other "×" and "-" were evaluated as failing.
〇: 10cc/m ^2.day.atm or less ×: 10cc/m ^2.day.atm or more -: Test not possible due to insufficient adhesion

(Scratch resistance)
The scratch resistance was measured using the surface strengthening test specified by the Wallpaper Industry Association.
The evaluation criteria for scratch resistance were as follows: 3 levels of "◯", "×", and "-". "◯" was evaluated as passing, and the other levels "×" and "-" were evaluated as failing.
○: No exposure of foamed resin layer ×: Slight exposure of foamed resin layer -: Test not possible due to insufficient adhesion

(environment)
The environment was judged based on whether or not the surface film layer contained "chlorine."
The environmental evaluation criteria were as follows: two levels, "○" and "×", with "○" being evaluated as passing and "×" being failing.
◯: The surface film layer does not contain chlorine. ×: The surface film layer contains chlorine.

(Non-flammable)
The non-combustibility was evaluated by a heat generation test (heating at 50 kW/ ^{m2 for 20 minutes) of the non-combustible material based on the heat generation test method (ISO 5660) specified in the Building Standards Act, using a cone calorimeter C3} (manufactured by Toyo Seiki Co., Ltd.).
The evaluation criteria for non-flammability were as follows: "○" and "×", with "○" being evaluated as passing and "×" being failing.
○: Burned calories are 7.2 MJ or less ×: Burned calories are over 7.2 MJ

(Evaluation Results)
The evaluation results of the wallpaper are as shown in Table 1 below.

(Examples 1 to 3 and Comparative Examples 1 to 6)
Among Examples 1 to 3 and Comparative Examples 1 to 6, only three of Examples 1 to 3 were "passed" in all six types of evaluation methods.

(Film Adhesion Evaluation Results)
Concerning the film adhesion, four of Comparative Examples 3 to 6 were unsatisfactory.
This is presumably because a surface film layer of a type other than the ethylene-vinyl alcohol copolymer surface film layer used in Example 1 (HF-ME12 manufactured by Kuraray Co., Ltd.) was used.

(Evaluation of Design)
In the evaluation of design, the five comparative examples, 1 and 3 to 6, were unsatisfactory.
It is presumed that the cause of the problem in Comparative Example 1 was that the basis weight of the foamed resin layer was too small, and that the cause of the problem in Comparative Examples 3 to 6 was that a type of surface film layer other than that used in Example 1 was used.

(Gas barrier property evaluation results)
In the evaluation of the gas barrier property, four of Comparative Examples 3 to 6 failed.
This is presumably because a surface film layer of a type other than that used in Example 1 was used.

(Scratch resistance evaluation results)
In the evaluation of scratch resistance, three of Comparative Examples 3 to 6, excluding Comparative Example 4, failed the test.
It is presumed that the cause of the three cases of Comparative Examples 3, 5 and 6 is that a type of surface film layer other than that used in Example 1 was used.

(Environmental evaluation results)
Regarding the environmental evaluation, only the comparative example 3 failed.
Regarding the one case in Comparative Example 3, it is presumed that the cause was that a surface film layer of a type other than that used in Example 1 was used.

(Non-flammable evaluation results)
As for non-combustibility, the three comparative examples, 2, 5 and 6, failed the test.
It is presumed that the cause of the problem in Comparative Example 2 was that the basis weight of the foamed resin layer was too high, and that the cause of the problem in Comparative Examples 5 and 6 was that a type of surface film layer other than that used in Example 1 was used.

(Overall evaluation results)
Comparing Examples 1 to 3 with Comparative Examples 1 and 2, only the basis weight of the foamed resin layer was changed.
Examples 1 to 3 were "passed" in all six types of evaluation methods.
In contrast, in Comparative Example 1, the foamed resin layer had an excessively small basis weight, and therefore the design was not evaluated as acceptable.

In addition, in Comparative Example 2, the foamed resin layer had too much basis weight, and therefore the non-combustibility was evaluated as unacceptable.
From this, it can be inferred from Examples 1 to 3 that the basis weight of the foamed resin layer is appropriately 80 g/m ² or more and 100 g/m ² or less.
It can also be assumed that the basis weight of the foamed resin layer affects the design and fire resistance.

On the other hand, when comparing Examples 1 to 3 with Comparative Examples 3 to 6, it can be inferred that the surface film layer made of the ethylene-vinyl alcohol copolymer used in Example 1 (HF-ME12 manufactured by Kuraray Co., Ltd.) is optimal.
It can also be assumed that the type of surface film layer affects at least one of the six types of evaluation results.

REFERENCE SIGNS LIST 10 Wallpaper 11 Paper base material 12 Foamed resin layer 13 Design layer 14 Surface film layer 15 Embossed pattern

Claims (8)

A paper substrate;
A foamed resin layer containing at least a resin component, a foaming agent, and a filler;
A pattern layer having a printed pattern;
An anchor coat layer containing an acrylic resin;
a surface film layer of an ethylene-vinyl alcohol copolymer;
A wallpaper in which the following are laminated in order:
The foamed resin layer is made of a non-vinyl chloride resin containing at least one of an ethylene-vinyl acetate copolymer and an ethylene-unsaturated carboxylic acid copolymer,
Wallpaper characterized in that the foamed resin layer has a basis weight of 80 g/ ^m2 or more and 100 g/ ^m2 or less. 2. The wallpaper according to claim 1, wherein the basis weight of the paper base material is set to 50 g/m2 or ^more and 70 g/ ^m2 or less. The wallpaper according to claim 1 or 2, characterized in that the amount of the foaming agent added is 5 parts by mass or more and 20 parts by mass or less per 100 parts by mass of the resin component of the foamed resin layer. The wallpaper according to any one of claims 1 to 3, characterized in that the foamed resin layer is made of a non-vinyl chloride resin containing the ethylene-unsaturated carboxylic acid copolymer. the ethylene-unsaturated carboxylic acid copolymer is an ethylene-methyl methacrylate copolymer or an ethylene-methacrylic acid copolymer;
The copolymerization ratio of methyl methacrylate (MMA amount) in the ethylene-methyl methacrylate copolymer is within the range of 5% by mass or more and 25% by mass or less,
5. The wallpaper according to claim 4, wherein a copolymerization ratio of acrylic acid (MAA amount) in the ethylene-methacrylic acid copolymer is within a range of 2% by mass or more and 15% by mass or less. A paper substrate;
A resin layer containing at least a resin component, a foaming agent, and a filler;
A pattern layer having a printed pattern;
An anchor coat layer containing an acrylic resin;
are layered in order,
Immediately after the resin layer is heated and foamed, a film is laminated on the surface of the design layer while applying a certain temperature and a certain pressure, and then cooled to form a surface film layer;
The foamed resin layer is made of a non-vinyl chloride resin containing at least one of an ethylene-vinyl acetate copolymer and an ethylene-unsaturated carboxylic acid copolymer,
The foamed resin layer has a basis weight of 80 g/m2 or ^more and 100 g/m2 or ^less .
The method for producing wallpaper, wherein the surface film layer is an ethylene-vinyl alcohol copolymer film . 7. The method for manufacturing wallpaper according to claim 6 , wherein the foamed resin layer is made of a non-vinyl chloride resin containing an ethylene-unsaturated carboxylic acid copolymer. the ethylene-unsaturated carboxylic acid copolymer is an ethylene-methyl methacrylate copolymer or an ethylene-methacrylic acid copolymer;
The copolymerization ratio of methyl methacrylate (MMA amount) in the ethylene-methyl methacrylate copolymer is within the range of 5% by mass or more and 25% by mass or less,
8. The method for producing wallpaper according to claim 7 , wherein a copolymerization ratio of acrylic acid (MAA amount) in the ethylene-methacrylic acid copolymer is within a range of 2% by mass or more and 15% by mass or less.

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