Wall paper, wall paper manufacturing method

Abstract

To provide a wall paper having an anti-dust function capable of suppressing adherence of dust on a surface.SOLUTION: A wall paper according to the invention has an anti-dust function, and comprises a foam resin layer containing polyvinyl chloride resin, and a surface functional layer formed of coat containing polyamide derivative. Alternatively, the wall paper has the anti-dust function, and comprises the foam resin layer containing polyvinyl chloride resin, and a surface functional layer formed of a coat containing polyamide derivative having a polyether group, vinyl chloride-based copolymer and / or acrylic acid ester-based copolymer so that the content of the vinyl chloride-based copolymer and / or acrylic acid ester-based copolymer is larger than content of the polyamide derivative.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to wallpaper having anti-dust function and a method for manufacturing wallpaper having anti-dust function. [Background technology]

[0002] Wallpaper, also known as wallpaper, is an interior finishing material that is applied to finished surfaces such as walls and ceilings for the purposes of protecting the base and decoration. Wallpaper generally consists of a base paper substrate on which a foamed resin layer and a surface functional layer are laminated. The foamed resin layer is a layer made of foamed polyvinyl chloride resin. The surface functional layer is a layer that imparts functions such as matte finish, water repellency, deodorizing properties, and antibacterial properties to the wallpaper surface.

[0003] Wallpaper is generally produced by coating the surface of a base paper substrate with a polyvinyl chloride resin composition containing a foaming agent to form a film, and then coating a raw material on top of the composition according to the function to be imparted to the wallpaper surface to form a film. The polyvinyl chloride resin layer is then foamed by heating to form a foamed resin layer. When a concave-convex pattern is to be formed on the wallpaper surface, an embossing process accompanied by heating is further carried out.

[0004] However, wallpaper can become dirty when dust particles floating in the air, such as dust and pollen, adhere to the surface. Dirt is particularly likely to occur around vents and windows where air flows, and in corners of rooms where dust tends to accumulate. Some wallpapers, such as those in Patent Document 2, have an anti-soiling function, but the anti-dust function that prevents dust from adhering to the surface is insufficient. For this reason, wallpapers with anti-dust function have not yet been put into practical use as products. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6713241 (Patent Publication No. 2020-190041) [Patent Document 2] JP 2011-106042 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made based on the above circumstances, and an object of the present invention is to provide wallpaper having an anti-dust function capable of suppressing adhesion of dust to the surface, and a manufacturing method thereof.

[0007] Another object of the present invention is to provide wallpaper having improved durability in addition to anti-dust function, and a manufacturing method thereof. [Means for solving the problem]

[0008] The gist of the present invention is as follows. (1) The wallpaper of the present invention comprises a foamed resin layer containing a polyvinyl chloride resin, The present invention is characterized by having a surface functional layer formed of a coating film containing a polyamide derivative having a polyether group, and by having an anti-dust function. (2) The wallpaper of the present invention comprises a foamed resin layer containing a polyvinyl chloride resin, The present invention is characterized by having an anti-dust function and a surface functional layer formed of a coating film containing a polyamide derivative having a polyether group, and a vinyl chloride-based copolymer and / or an acrylic acid ester-based copolymer, in which the content of the vinyl chloride-based copolymer and / or the acrylic acid ester-based copolymer is greater than the content of the polyamide derivative. (3) The polyamide derivative having a polyether group includes a polyetheresteramide represented by chemical formula (I) or (II) or a derivative thereof, or a polyetherpolyamide represented by chemical formula (III) or (IV) or a derivative thereof. [ka] R a represents a linear or branched alkylene group having 1 to 10 carbon atoms. l 1 is 1 to 10, m 1is 1 to 10, n 1 is between 1000 and 10000. x 1 is 1 to 10. [ka] l 2 is 1 to 10, m 2 is 1 to 10, n 2 is between 1000 and 10000. x 2 is 1 to 10. (4) The wallpaper of the present invention comprises a foamed resin layer containing a polyvinyl chloride resin, and a surface functional layer formed of a coating film containing polyether ester or a derivative thereof, and characterized by having an anti-dust function. (5) The wallpaper of the present invention comprises a foamed resin layer containing a polyvinyl chloride resin, The present invention is characterized by having an anti-dust function and comprising a surface functional layer formed of a coating film containing polyether ester or a derivative thereof, and a vinyl chloride-based copolymer and / or an acrylic acid ester-based copolymer, the content of which is greater than the content of the polyether ester or a derivative thereof. (6) The polyether ester or a derivative thereof includes a polyether ester or a derivative thereof represented by chemical formula (V). [ka] R a represents a linear or branched alkylene group having 1 to 10 carbon atoms. l 3 is 1 to 10, n 3 is between 1000 and 10000. (7) A method for producing wallpaper of the present invention includes the steps of forming a coating film containing a polyvinyl chloride resin and a foaming agent on a substrate; forming a coating film containing a polyamide derivative having a polyether group to form a surface functional layer; and a step of foaming the coating film containing the polyvinyl chloride resin to form a foamed resin layer, thereby producing wallpaper having anti-dust properties. (8) A method for producing wallpaper of the present invention includes the steps of forming a coating film containing a polyvinyl chloride resin and a foaming agent on a substrate; A step of forming a coating film containing a polyether ester or a derivative thereof to form a surface functional layer; and a step of foaming the coating film containing the polyvinyl chloride resin to form a foamed resin layer, thereby producing wallpaper having anti-dust properties. Effect of the Invention

[0009] The wallpaper of the present invention includes a foamed resin layer containing a polyvinyl chloride resin and a surface functional layer formed of a coating film containing a polyamide derivative having a polyether group, thereby preventing dust floating in the air from adhering to the surface. As a result, it becomes possible to provide wallpaper with anti-dust function as a practical product to consumers, wholesalers, etc. Wallpaper with anti-dust function can also be realized by using a surface functional layer formed of a coating film containing a polyether ester or its derivative instead of a polyamide derivative having a polyether group.

[0010] Furthermore, the wallpaper of the present invention comprises a foamed resin layer containing polyvinyl chloride resin, and a surface functional layer formed of a coating film containing a polyamide derivative having a polyether group, a vinyl chloride copolymer and / or an acrylic acid ester copolymer, the content of which is greater than the content of the polyamide derivative, making it possible to provide wallpaper with improved durability in addition to anti-dust function. Wallpaper with improved durability in addition to anti-dust function can also be realized by using a surface functional layer formed of a coating film containing polyether ester or its derivative instead of a polyamide derivative having a polyether group. [Brief description of the drawings]

[0011] [Figure 1] 1 is a longitudinal sectional view of a wallpaper according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a flow diagram illustrating a manufacturing process for wallpaper according to an embodiment of the present invention. [Figure 4] FIG. 2 is a diagram illustrating a surface treatment step in the above manufacturing process. [Diagram 5] FIG. 2 is a diagram illustrating an embossing step in the above manufacturing process. [Figure 6] The results of examples and comparative examples carried out to confirm the effects of this embodiment are shown below. [Figure 7] The results of examples and comparative examples carried out to confirm the effects of this embodiment are shown below. [Figure 8] The results of examples and comparative examples carried out to confirm the effects of this embodiment are shown below. [Figure 9] The results of examples carried out to confirm the effects of this embodiment are shown below. [Figure 10] The results of examples carried out to confirm the effects of this embodiment are shown below. [Figure 11] The results of examples carried out to confirm the effects of this embodiment are shown below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wallpaper and a method for manufacturing the wallpaper according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical scope of the present invention is not limited to the following embodiments.

[0013] (First embodiment) As shown in Fig. 1, the wallpaper 1 of this embodiment has a structure in which a foamed resin layer 12 and a surface functional layer 13 are laminated in this order on a base paper that serves as a substrate 11. The foamed resin layer 12 and the surface functional layer 13 may be embossed together while laminated on the substrate 11 to form a concave-convex pattern on the surface. For convenience of drawing, aligned concaves and convexes are shown, but the concave-convex pattern may be a fabric texture (woven texture), a stone texture, a geometric texture, or any other desired pattern. Although not shown in the drawings, patterns, figures, letters, etc. may also be printed.

[0014] The base paper that becomes the substrate 11 is, for example, a sheet material such as paper, woven fabric, knitted fabric, or nonwoven fabric. The substrate 11 may be formed of a single material or a plurality of materials. The thickness of the substrate 11 is, for example, 0.09 to 0.15 mm. The wallpaper 1 is attached by attaching the back side of the substrate 11 to a surface to be finished such as a wall or ceiling with, for example, an adhesive. The back side of the substrate 11 may be left exposed, or an adhesive layer for attaching the substrate to the surface to be finished may be formed, and a release sheet for protecting the adhesive layer may be further provided.

[0015] The foamed resin layer 12 is a foamed layer mainly composed of polyvinyl chloride resin. For example, the foamed resin layer 12 is formed by applying a paste-like sol containing polyvinyl chloride resin, a foaming agent, and further optional additives to the surface of the substrate 11, gelling it by heating to form a film, and then foaming it. The foamed resin layer 12 may further contain at least one of a plasticizer, a stabilizer, a filler, a fungicide, a colorant, and the like as an optional additive. It may further contain a residual component of the added foaming agent. Therefore, "mainly composed of polyvinyl chloride resin" means that the content of polyvinyl chloride resin constituting the foamed resin layer 12 is 30% by mass or more, preferably 50% by mass or more. The thickness of the foamed resin layer 12 is, for example, 0.3 mm or more, preferably 0.5 to 1.0 mm.

[0016] The polyvinyl chloride resin used has, for example, an average degree of polymerization (JIS K 6720-2) of 700 or more. When expressed in K value, it is, for example, 60.3 or more. Preferably, the average degree of polymerization is 700 to 1300 (K value: 60.3 to 70.4).

[0017] The foaming agent to be used is, for example, one that foams when heated. A preferred example of the foaming agent is an azo-based foaming agent such as azodicarbonamide, or a hydrazide-based foaming agent such as oxybisbenzenesulfonylhydrazide. The content of the foaming agent is, for example, 1 to 5 parts by mass per 100 parts by mass of polyvinyl chloride resin. When using a polyvinyl chloride resin with an average degree of polymerization of 700 or more to enhance design, the content of the foaming agent is adjusted, for example, so that the expansion ratio is 2 to 8 times.

[0018] Examples of the filler include calcium carbonate, talc, silica, and carbon black. The content of the filler is, for example, 10 to 150 parts by mass relative to 100 parts by mass of polyvinyl chloride resin. Examples of the plasticizer include dioctyl phthalate (DOP), diisononyl phthalate (DINP), and the like. The content of the plasticizer is, for example, 30 to 80 parts by mass relative to 100 parts by mass of polyvinyl chloride resin. Examples of the stabilizer include zinc-based compounds. The content of the stabilizer is, for example, 2 to 5 parts by mass relative to 100 parts by mass of polyvinyl chloride resin. Examples of the mildew-proofing agent include industrial antiseptic and mildew-proofing agents. The content of the mildew-proofing agent is, for example, 0.1 to 3.0 parts by mass relative to 100 parts by mass of polyvinyl chloride resin. Examples of the colorant include titanium and organic pigments. The content of the colorant is, for example, 10 to 20 parts by mass relative to 100 parts by mass of polyvinyl chloride resin.

[0019] The surface functional layer 13 is a functional layer containing components according to the function to be imparted to the wallpaper surface. A preferred example of the surface functional layer 13 is a coating film formed by applying a liquid raw material prepared according to the function to be imparted. The liquid raw material is preferably, for example, an aqueous solution using water as a solvent. The essential function in this embodiment is an anti-dust function that suppresses dust from adhering to the wallpaper surface. For this purpose, the surface functional layer 13 contains a "polyamide derivative having a polyether group" which will be described in detail later. Hereinafter, for the sake of simplicity of terminology, it may be simply referred to as a "polyamide derivative". However, the function to be imparted to the wallpaper surface may be not only an anti-dust function, but also other functions such as matte, water repellency, deodorizing properties, and antibacterial properties. Therefore, the surface functional layer 13 contains one or more components according to the function to be imparted. The thickness of the surface functional layer 13 is, for example, 0.5 to 3.5 μm.

[0020] The surface functional layer 13 may be formed in a dispersed manner so that the foamed resin layer 12 is exposed in a plan view, or may be formed so as to cover the entire surface of the foamed resin layer 12. FIG. 2 shows a schematic diagram of a wallpaper surface to which a liquid raw material is applied. FIG. 2(a) shows an example of application in a dispersed manner so that the surface of the foamed resin layer 12 is exposed. FIG. 2(b) shows an example of application in a manner to cover the entire surface. Note that FIG. 2(a) shows an example of a regular arrangement of diamonds, but this is not limited thereto. Regular arrangements such as circles, ellipses, squares, and polygons may also be used, and irregular arrangements may also be used. In addition, the length of the diagonal line of the diamond in FIG. 2(a) is, for example, 0.5 mm, but the size can be changed as appropriate.

[0021] The shape of the surface functional layer 13 can be determined by the surface shape of the roller used to form the coating. However, when forming a film by applying a liquid raw material, the outline of the dispersed surface functional layer 13 may be blurred, and even if the entire surface is covered, it may not be completely covered. When the average polymerization degree of the polyvinyl chloride resin is 1000 or more, it is preferable to expose the surface of the foamed resin layer 12 as shown in FIG. 2(a). This is because it is possible to prevent punctures from occurring during embossing. In this case, the surface functional layer 13 preferably occupies 50% to 80% per unit area in a plan view. If it exceeds 80%, punctures and gas accumulation during embossing cannot be sufficiently prevented, and conversely, if it is less than 50%, the function of the surface functional layer 13 may not be fully exhibited.

[0022] Dust that is prevented from adhering by the anti-dust function is solid fine particles suspended in the air. It is not limited to those floating in the air, but also includes those suspended by air currents formed by ventilation, etc. Furthermore, it also includes those that gather in corners of a room, for example. Specific examples of dust are dust, sand dust, cotton dust, tar smoke, pollen, etc., but the type is not limited. It also includes house dust and particles larger than house dust.

[0023] The anti-dust function can be imparted and improved by incorporating a polyamide derivative having a polyether group into the surface functional layer 13. A preferred example of the polyamide derivative having a polyether group is a polyetheresteramide that can be represented by the following chemical formula (I) or (II). Alternatively, it may be a derivative thereof. In other words, it may be a compound (derivative) that has been modified to an extent that does not significantly change the base structure or properties of the polyetheresteramide, for example, by introducing a functional group, oxidizing, reducing, or substituting an atom. [ka] R arepresents a straight-chain or branched alkylene group having 1 to 10 carbon atoms, such as a methylene group, an ethylene group, a trimethylene group, a propylene group, a methylmethylene group, a dimethylmethylene group, an ethylmethylene group, an ethylmethylmethylene group, a tetramethylene group, an ethylethylene group, or a pentamethylene group. 1 is 1 to 10, m 1 is 1 to 10, n 1 is between 1000 and 10000. x 1 is 1 to 10.

[0024] The polyether ester amide can be one produced by a bonding reaction between a polyether polyamide and a polyglycol. Therefore, the polyamide derivative having a polyether group contained in the surface functional layer 13 may contain not only polyether ester amide but also unreacted polyether polyamide. That is, the surface functional layer 13 may contain a polyether polyamide that can be represented by the following chemical formula (III) or (IV). Or it may be a derivative thereof. That is, it may be a compound (derivative) that has been modified to an extent that does not significantly change the base structure or properties of the polyether polyamide, for example, by introducing a functional group, oxidizing, reducing, or replacing an atom. It may contain a polyether polyamide without containing a polyether ester amide. [ka] l 2 is 1 to 10, m 2 is 1 to 10, n 2 is between 1000 and 10000. x 2 is 1 to 10.

[0025] The polyamide derivative having a polyether group contained in the surface functional layer 13 is preferably, but not limited to, polyetheresteramide or polyetherpolyamide represented by the above-mentioned chemical formula. However, it is preferable that the polyamide derivative has both a polyether group and a polyamide group. As can be seen from the test results of the examples described later, the anti-dust function on the surface of the wallpaper can be ensured by the synergistic effect of the moisture absorbing effect of the polyether group in the polyamide derivative, the polyether structure in which the electrolyte or ionic substance plays the role of an electrolytic solution, and the conductive action due to the cationicity of the polyamide group. When the polyamide derivative having a polyether group, vinyl chloride copolymer and / or acrylic acid ester copolymer, and silica are contained in the surface functional layer 13, the content of the polyamide derivative having a polyether group in the surface functional layer 13 is, for example, 1% by mass or more when the total amount of these components is 100% by mass. The content is preferably 1.2 to 4.0% by mass. In consideration of the cost, the content is more preferably 1.4 to 2.0% by mass.

[0026] The surface functional layer 13 can be given a function as a surface protection layer that prevents the wallpaper surface from being scratched. In this embodiment, in addition to the anti-dust function, the protection function of the wallpaper surface can be strengthened. This can increase the durability of the wallpaper, and as a result, the anti-dust function can also be maintained.

[0027] The protective function of the wallpaper surface can be enhanced by incorporating vinyl chloride copolymer and / or acrylic acid ester copolymer resins in the surface functional layer 13 and adjusting the content in the surface functional layer 13. Preferred examples of the vinyl chloride copolymer and acrylic acid ester copolymer are both copolymers of vinyl chloride and acrylic acid ester. Of these, the vinyl chloride copolymer is one in which the copolymerization amount of vinyl chloride is increased, for example, to emphasize the characteristics of vinyl chloride. The acrylic acid ester copolymer is one in which the copolymerization amount of acrylic acid ester is increased, for example, to emphasize the characteristics of acrylic acid ester.

[0028] As shown in the test results described later, the vinyl chloride copolymer and / or acrylic ester copolymer resin can maintain the anti-dust function and enhance the protective function of the wallpaper surface by changing the compounding recipe. That is, when the surface functional layer 13 contains a polyamide derivative having a polyether group, a vinyl chloride copolymer and / or an acrylic ester copolymer, and silica, the content of the vinyl chloride copolymer and / or acrylic ester copolymer in the surface functional layer 13 is, for example, 35% by mass or more, preferably 35% by mass to 64% by mass, when the total amount of these components is taken as 100% by mass. For example, in terms of the strength of the wallpaper surface due to the surface functional layer 13, the content of the vinyl chloride copolymer is 35% by mass or more and less than 60% by mass in the case of a standard product. In the case of a product with improved durability that is more conscious of the surface strength than the standard product, the content of the vinyl chloride copolymer is 60% by mass or more and 64% by mass or less. The same applies to the acrylic ester copolymer. When both the vinyl chloride copolymer and the acrylic ester copolymer are contained, the total amount is the total amount.

[0029] When the surface functional layer 13 contains a vinyl chloride copolymer and / or an acrylic acid ester copolymer, it is preferable that the surface functional layer 13 further contains silica. The silica is more preferably amorphous silica. Silica mainly has a matte effect on the wallpaper surface. When the surface functional layer 13 contains a polyamide derivative having a polyether group, a vinyl chloride copolymer and / or an acrylic acid ester copolymer, and silica, the content of silica in the surface functional layer 13 is, for example, 35% by mass or more, preferably 35 to 64% by mass, when the total amount of these components is taken as 100% by mass. For example, regarding the strength of the wallpaper surface due to the surface functional layer 13, in the case of a standard product, the content of silica is more than 38% by mass and 40% by mass or less. In the case of a product with improved durability, the content of silica is 35% by mass or more and 38% by mass or less. The compounding ratio (mass basis) of the vinyl chloride copolymer and silica is preferably 50 parts by mass or more of silica per 100 parts by mass of the vinyl chloride copolymer. More preferably, the amount of silica is 55 to 67 parts by mass per 100 parts by mass of the vinyl chloride copolymer.

[0030] The surface functional layer 13 may further contain at least one component selected from the group consisting of a nonionic surfactant, an ionic surfactant, an ionic polymer, an acidic compound, a basic compound, and a preservative. A preservative is preferable. Examples of the preservative include isodiazoline, bromonitropropanediol, etc.

[0031] As mentioned above, the vinyl chloride copolymer and / or acrylic ester copolymer can enhance the protective function of the wallpaper surface by changing the compounding recipe. Other functions, such as water repellency, can be achieved by including a water repellent in the surface functional layer 13. Examples of water repellents include fluorine-containing acrylic resin water repellents and silicone emulsion water repellents.

[0032] Although not essential, when printing is applied to the wallpaper 1, printing is performed by a method such as gravure printing or flexographic printing. Printing is performed on the surface of the surface functional layer 13, or on the surface of the foamed resin layer 12 before forming the surface functional layer 13. The ink used for printing contains, for example, a colorant, an adhesive resin, and a solvent. Of course, the design or pattern to be printed is arbitrary, and the design is not limited.

[0033] Next, an example of a method for manufacturing wallpaper 1 according to this embodiment will be described with reference to Fig. 3. As shown in Fig. 3, the method for manufacturing wallpaper 1 includes a raw material blending step Act10, a coater step Act11 for forming a layer of polyvinyl chloride resin containing a foaming agent, a surface treatment step Act12 for forming a surface functional layer 13, a foaming step Act13 for foaming the polyvinyl chloride resin layer, an embossing step Act14 for forming a concave-convex pattern, and an inspection step Act15.

[0034] The blending process Act10 is a process in which polyvinyl chloride resin, a foaming agent, and optional additives such as a plasticizer, a stabilizer, a filler, a mold inhibitor, and a colorant are mixed in a predetermined blending ratio and stirred with a blender or a dissolver to generate a paste-like sol.

[0035] In the coater process Act11, the obtained paste-like sol is applied thinly and uniformly to the surface of the substrate 11, and is heated to gel. This is a process in which a resin layer 2 containing a foaming agent mainly composed of polyvinyl chloride resin is formed. The application of the paste-like sol is performed, for example, by a roll coater. The heating temperature is a temperature at which the foaming agent does not foam and at which gelation can be promoted. In the case of continuous processing, the substrate 11 wound in a roll is prepared in advance, and its tip is pulled out and sent to the roll coater. The roll coater applies the paste-like sol to the surface of the substrate 11 while transporting the substrate 11 with a rotating roll. Furthermore, the substrate 11 being transported is heated by a heating device, and a resin layer 2 mainly composed of polyvinyl chloride resin is formed. The substrate 11 on which the resin layer 2 mainly composed of polyvinyl chloride resin has been formed becomes the original roll of the wallpaper 1. The original roll is wound into a roll again and sent to the next process.

[0036] The surface treatment step Act12 is a step of forming a film by, for example, applying and drying a liquid raw material of the surface functional layer 13 on the surface of the resin layer 2 containing a foaming agent whose main component is polyvinyl chloride resin. The liquid raw material is prepared to contain components according to the function to be imparted. The liquid raw material can be prepared by mixing a plurality of solutions. For example, in the case of a standard product having an anti-dust function as the main function, a first liquid raw material containing a polyamide derivative having a polyether group and a solvent is mixed with a second liquid raw material containing a vinyl chloride copolymer and a solvent to prepare the liquid raw material. In this case, an aqueous solution in which the solvent is water is preferable.

[0037] The first liquid raw material contains a polyamide derivative having a polyether group and a solvent. The polyamide derivative having a polyether group is contained in an amount of, for example, about 10% by mass. As a preferred example, the first liquid raw material contains about 10% by mass of a polyetheresteramide that can be represented by the above-mentioned chemical formula (I) or (II). Alternatively, the first liquid raw material contains about 10% by mass of a polyetherpolyamide represented by the chemical formula (III) or (IV). Alternatively, the first liquid raw material contains both a polyetheresteramide and a polyetherpolyamide, and contains a total amount of about 10% by mass (hereinafter referred to as "liquid raw material A").

[0038] The second liquid raw material is an emulsion of a copolymer of vinyl chloride and an acrylic acid ester, and further contains amorphous silica. An aqueous emulsion in which the solvent is water is preferable. The copolymer of vinyl chloride and an acrylic acid ester is an example of the vinyl chloride-based copolymer described above, in which the amount of vinyl chloride copolymerized is increased to emphasize the characteristics of vinyl chloride. The second liquid raw material contains, for example, about 15% by mass of a vinyl chloride-based copolymer and, for example, about 10% by mass of amorphous silica (hereinafter referred to as "liquid raw material B").

[0039] In the case of a product with increased durability, a third liquid raw material is further mixed with the first and second liquid raw materials. The third liquid raw material is an emulsion of a copolymer of vinyl chloride and acrylic ester, and further contains amorphous silica. An aqueous emulsion in which the solvent is water is preferable. The copolymer of vinyl chloride and acrylic ester, like the second liquid raw material, is an example of a vinyl chloride-based copolymer in which the amount of vinyl chloride copolymerized is increased to emphasize the characteristics of vinyl chloride. Both the second and third liquid raw materials contain a vinyl chloride-based copolymer and amorphous silica, but the concentrations are different. The third liquid raw material contains, for example, about 20% by mass of a vinyl chloride-based copolymer and about 10% by mass of amorphous silica (hereinafter referred to as "liquid raw material C").

[0040] Below is an example of the mixing ratio of "Liquid Raw Material A," "Liquid Raw Material B," and "Liquid Raw Material C" for a standard product and a product with increased durability. (1) Standard product Liquid raw material A=4.17 parts by mass Liquid raw material B=100 parts by mass <In the surface functional layer 13, 1.7% by mass of polyamide derivative, 59% by mass of vinyl chloride copolymer, and 39.3% by mass of amorphous silica> (2) Improved durability Liquid raw material A=4.17 parts by mass Liquid raw material B=50 parts by mass Liquid raw material C=50 parts by mass <In the surface functional layer 13, 1.6% by mass of polyamide derivative, 61.3% by mass of vinyl chloride copolymer, and 37.1% by mass of amorphous silica> In addition, for the products with increased durability, the reason why "Liquid Raw Material C" was used at 100 parts by mass, but rather "Liquid Raw Material B" and "Liquid Raw Material C" were used at 50 parts by mass each, is that when prototypes were actually produced and tested, it was found that using 50 parts by mass each of "Liquid Raw Material B" and "Liquid Raw Material C" provided better anti-dust function and wallpaper surface protection function.

[0041] As described above, the liquid raw material B, which is an example of the second liquid raw material, and the liquid raw material C, which is an example of the third liquid raw material, contain "a copolymer of vinyl chloride and an acrylic acid ester (an example of a vinyl chloride-based copolymer)" in which the amount of copolymerization of vinyl chloride is increased to emphasize the characteristics of vinyl chloride, but instead of this, they may contain "a copolymer of vinyl chloride and an acrylic acid ester (an example of an acrylic acid ester-based copolymer)" in which the amount of copolymerization of acrylic acid ester is increased to emphasize the characteristics of acrylic acid ester. In this case, too, an aqueous emulsion in which the solvent is water is preferable. Another example of the second liquid raw material contains, for example, about 20% by mass of an acrylic acid ester-based copolymer and, for example, about 3% by mass of amorphous silica (hereinafter referred to as "liquid raw material D"). An example of the mixing ratio of liquid raw materials A and D is as follows. Liquid raw material A=4.17 parts by mass Liquid raw material D=100 parts by mass <In the surface functional layer 13, 1.8% by mass of polyamide derivative, 85.4% by mass of acrylic acid ester copolymer, and 12.8% by mass of amorphous silica>

[0042] As yet another example of the second liquid raw material, an emulsion of an acrylic acid ester copolymer not containing vinyl chloride may be used instead of the copolymer of vinyl chloride and acrylic acid ester described above. In this case, an aqueous emulsion in which the solvent is water is also preferable. As yet another example of the second liquid raw material, the emulsion contains, for example, about 7.5 mass% of an acrylic acid ester copolymer and about 0.7 mass% of amorphous silica (hereinafter referred to as "liquid raw material E"). The following is an example of the mixing ratio of liquid raw material A and liquid raw material E. Liquid raw material A=4.17 parts by mass Liquid raw material E=100 parts by mass <In the surface functional layer 13, 5.0% by mass of polyamide derivative, 86.9% by mass of acrylic acid ester copolymer, and 8.1% by mass of amorphous silica>

[0043] As an example, liquid raw material A can be "New Luster P-25N", a product of Nissin Chemical Research Institute Co., Ltd. As an example, liquid raw material B can be "Viniblan HD-057", a product of Nissin Chemical Industry Co., Ltd. As an example, liquid raw material C can be "Viniblan SI-07", a product of Nissin Chemical Industry Co., Ltd. As an example, liquid raw material D can be "Viniblan 897", a product of Nissin Chemical Industry Co., Ltd. As an example, liquid raw material E can be a 2-fold diluted aqueous solution of "Mica Primer EC-0712 Concentrate". "Viniblan" is a registered trademark of Nissin Chemical Industry Co., Ltd. and others.

[0044] As shown in FIG. 4, the liquid raw material R of the surface functional layer 13 prepared using the liquid raw materials A to E is applied by a roll coater. The roll coater includes a mesh roll 3, a backup roll 31, a liquid raw material supplying device 32, and a doctor blade 33. After the liquid raw material R is supplied to the surface of the mesh roll 3, the excess liquid raw material R is scraped off by the doctor blade 33, so that a liquid film of the liquid raw material R remains on the surface of the mesh roll 3. The liquid film of the liquid raw material R is transferred to the surface of the resin layer 2 mainly composed of polyvinyl chloride resin, thereby forming the surface functional layer 13. When forming the surface functional layer 13 dispersed on the surface of the foamed resin layer 12 as shown in FIG. 2(a), it is preferable to use a bias mesh roll disclosed in Japanese Patent No. 6713241 by the applicant of the present application.

[0045] The foaming step Act13 is a step of converting the resin layer 2, which is mainly composed of polyvinyl chloride resin containing a foaming agent, into a foamed resin layer 12 by heating at a temperature at which the foaming agent is heated and foamed. The heating temperature is, for example, 215 to 220° C. In the surface treatment step Act12, the surface functional layer 13 is formed using a bias mesh roll, so that excess gas and excess steam generated by foaming of the foaming agent in the foaming step Act13 are discharged from the foamed resin layer 12.

[0046] As shown in FIG. 5, the embossing step Act14 is a step in which the surface of the base material 11 on which the foamed resin layer 12 and the surface functional layer 13 are formed is heated to a temperature at which the polyvinyl chloride resin softens, and the surface is sandwiched and conveyed between a pair of upper and lower embossing rolls 4 and a backup roll 41 to form an uneven pattern on the surface, that is, the foamed resin layer 12 and the surface functional layer 13 are embossed together. The surface of the embossing roll 4 has unevenness corresponding to the uneven pattern to be formed. The sheet surface temperature by heating is, for example, 160 to 210° C., preferably 185 to 195° C. The pressing force of the embossing roll 4 is, for example, 1 to 4 kN. In order to prevent the foamed resin layer 12 from being punctured during embossing, needle embossing may be performed in addition to the formation of the surface functional layer 13 by the bias mesh roll described above.

[0047] The inspection process Act 15 is a process for inspecting whether the manufactured wallpaper 1 satisfies the product conditions without any problems. The inspection includes visual inspection by an inspector and mechanical inspection using a foreign object detector or the like.

[0048] As described above, the wallpaper 1 according to the above embodiment is provided with the foamed resin layer 12 containing polyvinyl chloride resin and the surface functional layer 13 formed of a coating film containing a polyamide derivative having a polyether group, thereby making it possible to prevent dust floating in the air from adhering to the surface. As a result, it is possible to provide the wallpaper 1 with anti-dust function to consumers, wholesalers, etc. as a practical product.

[0049] Furthermore, the wallpaper 1 according to the above-mentioned embodiment comprises a foamed resin layer 12 containing polyvinyl chloride resin, and a surface functional layer 13 formed of a coating film containing a polyamide derivative having a polyether group, a vinyl chloride copolymer and / or an acrylic ester copolymer, the content of which is greater than the content of the polyamide derivative. This makes it possible to provide wallpaper 1 which, in addition to having anti-dust functions, is resistant to scratches on the surface.

[0050] Second embodiment The wallpaper 1 having the anti-dust function may be configured to have a surface functional layer 13 formed of a coating film containing polyetherester or its derivatives instead of "polyamide derivatives having polyether groups" such as polyetheresteramide and polyetherpolyamide. Polyetherester or its derivatives ensure the anti-dust function on the wallpaper surface by the synergistic effect of the moisture absorbing effect of the polyether group and the conductive action of the polyether structure in which electrolytes and ionic substances act as electrolytes. In other words, even if the surface functional layer 13 formed of a coating film containing polyetherester is used, the wallpaper 1 having the same effect as the first embodiment can be realized. This is because the polyether group portion contributes to the manifestation of the anti-dust function on the wallpaper surface. Among polyetheresters, the polyetherester that can be represented by the following chemical formula (V) is preferable for imparting the anti-dust function. Or it may be a derivative thereof. That is, it may be a compound (derivative) that has been modified by, for example, introduction of a functional group, oxidation, reduction, atom replacement, or the like to a degree that does not significantly change the base structure or properties of the polyether ester. [ka] R a represents a linear or branched alkylene group having 1 to 10 carbon atoms. l 3 is 1 to 10, n 3 is between 1000 and 10000.

[0051] The first liquid raw material in this embodiment contains, as a preferred example, polyetherester that can be represented by chemical formula (V) and a solvent. The polyetherester is contained at, for example, about 10 mass % (hereinafter referred to as "liquid raw material A'"). The following is an example of the mixing ratio of "liquid raw material A'", "liquid raw material B", and "liquid raw material C" in a standard product and a product with improved durability. Note that, except for replacing liquid raw material A with liquid raw material A', the manufacturing process of wallpaper 1 is the same as that of the first embodiment. (1) Standard product Liquid raw material A'=4.17 parts by mass Liquid raw material B=100 parts by mass <In the surface functional layer 13, polyether ester 1.7% by mass, vinyl chloride copolymer 59% by mass, and amorphous silica 39.3% by mass> (2) Improved durability Liquid raw material A'=4.17 parts by mass Liquid raw material B=50 parts by mass Liquid raw material C=50 parts by mass <In the surface functional layer 13, polyether ester 1.6 mass %, vinyl chloride copolymer 61.3 mass %, amorphous silica 37.1 mass %>

[0052] Third embodiment The above-mentioned first and second embodiments have been described as preferred examples of wallpaper 1 (standard product, durable product) that can maintain the anti-dust function and enhance the protective function of the wallpaper surface. However, if the surface functional layer 13 contains "polyamide derivative having a polyether group" and / or "polyether ester or its derivative" as an essential component, the anti-dust function can be imparted and improved to the wallpaper 1, as shown in the results of the examples described later. That is, even if the surface functional layer 13 is composed only of "polyamide derivative having a polyether group" and / or "polyether ester or its derivative", the anti-dust function can be expressed. Therefore, other components contained in the surface functional layer 13 are not limited to the above-mentioned embodiments. Even if various components are contained in the surface functional layer 13, it is sufficient that the "polyamide derivative having a polyether group" and / or "polyether ester or its derivative" are contained in an amount of, for example, 1% by mass or more, preferably 1.2 to 4.0% by mass. EXAMPLES

[0053] Next, examples performed to confirm the effects of this embodiment will be described. (Evaluation Test 1) In the evaluation test 1, the mixture ratio of the liquid raw materials A to E forming the surface functional layer 13 was changed to produce wallpapers 1 of Examples 1 to 5, and the anti-dust function of each wallpaper 1 was evaluated. The anti-dust function was evaluated by placing a test piece of 4 cm x 4 cm of each produced wallpaper 1 in a container together with 0.5 g of dust and forcibly attaching it in the container. After attachment, the excess dust was lightly brushed off to evaluate the anti-dust function. The evaluation was performed using a gray scale for contamination (JIS L 0805), and the average evaluation (n = 5) was taken. The dust used was pollen (pseudo pollen: assuming cedar and cypress flowers). As a comparison with each of Examples 1 to 5, the same test was also performed on wallpapers (Comparative Examples 1 to 5) produced using liquid raw materials prepared so as not to contain polyamide derivatives having polyether groups. In other words, the difference in dust attachment due to the presence or absence of polyamide derivatives having polyether groups (other components were the same) was confirmed. The mixture ratio of the liquid raw materials of each wallpaper is as follows.

[0054] Liquid raw material A was "New Luster P-25N", liquid raw material B was "Viniblan HD-057", liquid raw material C was "Viniblan SI-07", liquid raw material D was "Viniblan 897", and liquid raw material E was a two-fold diluted aqueous solution of "Mica Primer EC-0712 Concentrate".

[0055] Example 1 (standard product) Liquid raw material A=4.17 parts by mass Liquid raw material B=100 parts by mass <In the surface functional layer 13, 1.7% by mass of polyamide derivative, 59% by mass of vinyl chloride copolymer, and 39.3% by mass of amorphous silica> Example 2 (Improved durability product A) Liquid raw material A=4.17 parts by mass Liquid raw material B=50 parts by mass Liquid raw material C=50 parts by mass <In the surface functional layer 13, 1.6% by mass of polyamide derivative, 61.3% by mass of vinyl chloride copolymer, and 37.1% by mass of amorphous silica> Example 3 (Improved durability product B) Liquid raw material A=4.17 parts by mass Liquid raw material C=100 parts by mass <In the surface treatment layer 13, 1.4% by mass of polyamide derivative, 65.7% by mass of vinyl chloride copolymer, and 32.9% by mass of amorphous silica> Example 4 Liquid raw material A=4.17 parts by mass Liquid raw material D=100 parts by mass <In the surface functional layer 13, 1.8% by mass of polyamide derivative, 85.4% by mass of acrylic acid ester copolymer, and 12.8% by mass of amorphous silica> Example 5 Liquid raw material A=4.17 parts by mass Liquid raw material E=100 parts by mass <In the surface functional layer 13, 5.0% by mass of polyamide derivative, 86.9% by mass of acrylic acid ester copolymer, and 8.1% by mass of amorphous silica> Example 6 (only polyamide derivatives having polyether groups) Liquid raw material A=100 parts by mass <Surface treatment layer 13: 100% by mass of polyamide derivative>

[0056] Comparative Example 1 Liquid raw material B=100 parts by mass <Surface functional layer 13: 60% by mass of vinyl chloride copolymer, 40% by mass of amorphous silica> Comparative Example 2 Liquid raw material B=50 parts by mass Liquid raw material C=50 parts by mass <In the surface functional layer 13, 62.3% by mass of vinyl chloride copolymer and 37.7% by mass of amorphous silica> Comparative Example 3 Liquid raw material C=100 parts by mass <In the surface functional layer 13, 66.7% by mass of vinyl chloride copolymer and 33.3% by mass of amorphous silica> Comparative Example 4 Liquid raw material D=100 parts by mass <Surface functional layer 13: 87% by mass of acrylic acid ester copolymer, 13% by mass of amorphous silica> Comparative Example 5 Liquid raw material E=100 parts by mass <Surface functional layer 13: 91.5% by mass of acrylic acid ester copolymer, 8.5% by mass of amorphous silica> Comparative Example 6 There is no surface functional layer 13, and the foamed resin layer 12 is exposed on the entire surface.

[0057] (Wallpaper 1 production conditions) A paste-like sol containing polyvinyl chloride resin with an average degree of polymerization of 700, a foaming agent, and additives was gelled into a thin film on base paper 11 to produce a base roll, and the prepared liquid raw material was applied to form a surface functional layer 13. The liquid raw materials of Examples 1 to 5 and Comparative Examples 1 to 5 were as described above. The liquid raw material was applied using a roll having a shape corresponding to FIG. 2(b). Next, the polyvinyl chloride resin was foamed by heating in an oven at 240°C for 40 seconds, and further embossed to produce wallpaper 1.

[0058] The results of the evaluation test 1 are shown in FIG. 6. As shown in FIG. 6, the evaluation results of the staining gray scale (JIS L 0805) for all of Examples 1 to 5 were two grades higher, including half a grade, than the corresponding Comparative Examples 1 to 5. That is, by containing a polyamide derivative having a polyether group, the anti-dust function can be imparted and improved regardless of the type and concentration of other components constituting the surface functional layer 13. Existing wallpapers available on the market have surface functional layers formed of various components depending on the functions to be imparted, such as matte finish, water repellency, deodorizing properties, and antibacterial properties, but the application of the present technology has the advantage that the anti-dust function can be imparted and improved to any wallpaper. Among them, the standard product and the durability-up product A, which are examples of the first embodiment, were evaluated as grades 4-5 and 4, respectively. Since the evaluations were grades 1 to 5, it can be seen that they exhibit extremely excellent anti-dust functions. Moreover, all of the wallpapers 1 also have a function of protecting the wallpaper surface.

[0059] In addition, when durability-enhanced product A is compared with durability-enhanced product B, durability-enhanced product A has a superior anti-dust function. When examining this difference, it was found that the protective function of the wallpaper surface is enhanced as the amount of vinyl chloride copolymer is increased, but the anti-dust function decreases when the amount of vinyl chloride copolymer exceeds a certain amount. This tendency is particularly evident in wallpaper 1, which has an embossed surface. It is presumed that the reason for this is related to the blending ratio of vinyl chloride copolymer and silica. In other words, the blending ratio (mass basis) of vinyl chloride copolymer and silica is preferably greater than 50 mass parts of silica per 100 mass parts of vinyl chloride copolymer. More preferably, the amount of silica is 55 to 67 mass parts per 100 mass parts of vinyl chloride copolymer.

[0060] (Evaluation Test 2) In evaluation test 2, the anti-dust function against various types of dust was evaluated using the durability-enhanced product A of Example 2 and the wallpaper of Comparative Example 3. The dusts used in the test were as follows. Dust 1: Cotton dust (Test cotton dust: JIS S 3031) Dust 2: Pollen (pseudo pollen: cedar and cypress flowers) The anti-dust function was evaluated in the same way as in Evaluation Test 1, by placing a 4cm x 4cm test piece of the produced wallpaper 1 in a container together with 0.5g of dust and forcing it to adhere inside the container. After adhesion, the excess dust was lightly brushed off to evaluate the anti-dust function. The evaluation was made using a staining gray scale (JIS L 0805) and the average evaluation (n=5) was made.

[0061] The test results for Dust 1 and Dust 2 are shown in Figure 7. As shown in Figure 7, the evaluation results of the durability-enhanced product A of Example 2 using the pollution gray scale (JIS L 0805) were grade 4 for both Dust 1 and Dust 2. In contrast, the evaluation results of Comparative Example 3 were grade 2-3 for Dust 1 and grade 2 for Dust 2. In other words, it was confirmed that wallpaper 1 of the durability-enhanced product A of Example 2 exhibits anti-dust function against different types of Dust 1 and 2.

[0062] (Evaluation Test 3) In evaluation test 3, wallpaper 1 of durability-enhanced product A of Example 2 and wallpaper of Comparative Example 3 were actually attached to the wall around a ventilation fan to evaluate the anti-dust function. Figure 8 shows the state 17 months after the start of the test. As is clear from the results of Figure 8, it was confirmed that wallpaper 1 of durability-enhanced product A of Example 2 can maintain the anti-dust function for a long period of time.

[0063] (Evaluation Test 4) The surface strength of the wallpaper 1 of the standard product of Example 1 and the durability-improved product A of Example 2 was evaluated. The evaluation method was based on the Wallpaper Industry Association's "Surface-strengthened Wallpaper Performance Standards," in which a load of 200 g was applied back and forth five times over the surface of Wallpaper 1 to evaluate the degree of damage to the surface. The test was performed using multiple test pieces for both the standard product of Example 1 and the durability-enhanced product A of Example 2, and the average evaluation (n=5) was recorded. The criteria are as follows: Grade 5: No particular changes are visible at first glance Grade 4: Some surface scratches are visible, but no major tears or other damage to the surface layer are visible. Grade 3: Clearly visible tears in the surface layer Grade 2: The surface is torn and the backing material (base material 11) such as paper is clearly visible (less than 1 cm in length) Grade 1: The surface is torn and the backing material (base material 11) such as paper is clearly visible (length 1 cm or more)

[0064] The evaluation results of surface strength are shown in FIG. 9. As shown in FIG. 9, the wallpaper 1 of the durability-enhanced product A in Example 2 had a surface strength equivalent to grades 3 to 4. That is, some test pieces were judged to be grade 4 and others to be grade 3. In contrast, the standard wallpaper 1 of Example 1 had a surface strength equivalent to grades 1 to 2. That is, some test pieces were judged to be grade 2 and others to be grade 1. From the above results, it was confirmed that the wallpaper 1 of the durability-enhanced product A has good durability in addition to anti-dust function. For example, the reason for replacing wallpaper 1 in rental properties is often due to scratches. The wallpaper 1 of the surface-reinforced product A is advantageous in that it is less susceptible to scratches.

[0065] (Evaluation Test 5) This test is an evaluation test to confirm the anti-dust function of the surface functional layer 13 containing polyether ester. The liquid raw material of the surface functional layer 13 containing polyether ester was the liquid raw material A' exemplified in the second embodiment. A test piece of wallpaper 1 was produced in the same manner as in Example 6 above, and the anti-dust function was evaluated in the same manner as in Evaluation Test 1. Pollen (pseudo pollen: cedar and cypress flowers) was used as dust (dust 2 above). Example 7 (polyether ester only) Liquid raw material A'=100 parts by mass <Surface treatment layer 13: 100% by mass of polyether ester>

[0066] The results of evaluation test 5 are shown in FIG. 10. For comparison, the results of Example 6 and Comparative Example 6 are also shown in FIG. 10. As is clear from the results in FIG. 10, the evaluation results for both Example 7 and Example 6 were grades 3-4. In other words, the surface functional layer 13 containing polyether ester exhibits anti-dust function equivalent to that of the surface functional layer 13 containing a polyamide derivative having a polyether group. Note that evaluation test 5 was performed with a surface functional layer 13 containing only polyether ester, but even if liquid raw material B or the like is mixed to increase durability, the same anti-dust function is exhibited.

[0067] (Evaluation Test 6) This test was an evaluation test to confirm the anti-dust function of polyetheresteramide. In other words, in evaluation tests 1 to 4, "New Luster P-25N", a product of Nissin Chemical Laboratory Co., Ltd., was used as liquid raw material A. In addition to polyetheresteramide, "New Luster P-25N" contains additives such as polyetherpolyamide, which is an unreacted residue from the manufacturing process, and preservatives. Therefore, a 10% by mass aqueous solution of only polyetheresteramide was obtained from the manufacturer and a test similar to that of evaluation test 1 was conducted. Example 8 (polyetheresteramide only) Liquid raw material A (10% by weight aqueous solution of polyether ester amide) = 100 parts by weight <Surface treatment layer 13: 100% by mass of polyether ester amide>

[0068] The results of Evaluation Test 6 are shown in Figure 11. For comparison, Figure 11 also shows the results of Example 6 (i.e., New Luster P-25N was used) and Comparative Example 6 (without surface functional layer 13). As is clear from the results in Figure 11, Example 8 was evaluated as being grade 3-4, just like Example 6. In other words, it was confirmed that the anti-dust function can be achieved only by polyether ester amide excluding unreacted residues and additives.

[0069] Although the present invention has been described in detail with reference to specific embodiments, it will be apparent to those skilled in the art that various substitutions, modifications, changes, etc. in form and detail can be made therein without departing from the spirit and scope of the present invention as defined by the claims. [Explanation of symbols]

[0070] 1 wallpaper 11 Base material 12 Foamed resin layer 13 Surface functional layer 2. Resin layer containing a foaming agent mainly composed of polyvinyl chloride resin 3 mesh rolls 31 Backup Role 32 Liquid raw material supply machine 33 Doctor Blade R Liquid raw material 4 Embossing roll 41 Backup Roll

Claims

1. A foamed resin layer containing a polyvinyl chloride resin; A wallpaper having an anti-dust function, comprising: a surface functional layer formed of a coating film containing a polyamide derivative having a polyether group.

2. A foamed resin layer containing a polyvinyl chloride resin; 1. Wallpaper having an anti-dust function, comprising: a surface functional layer formed of a coating film containing a polyamide derivative having a polyether group, and a vinyl chloride copolymer and / or an acrylic ester copolymer, the content of said vinyl chloride copolymer and / or acrylic ester copolymer being greater than the content of said polyamide derivative.

3. 3. The wallpaper according to claim 1 or 2, characterized in that the polyamide derivative having a polyether group comprises a polyetheresteramide represented by chemical formula (I) or (II) or a derivative thereof, or a polyetherpolyamide represented by chemical formula (III) or (IV) or a derivative thereof. 【Chemistry 1】 R ａ represents a straight-chain or branched alkylene group having 1 to 10 carbon atoms. l １ is 1 to 10, m １ is 1 to 10, n １ is between 1000 and 10000. x １ is 1 to 10. 【Chemistry 2】 l ２ is 1 to 10, m ２ is 1 to 10, n ２ is between 1000 and 10000. x ２ is 1 to 10.

4. A foamed resin layer containing a polyvinyl chloride resin; A wallpaper characterized by having an anti-dust function and a surface functional layer formed of a coating film containing polyether ester or a derivative thereof.

5. A foamed resin layer containing a polyvinyl chloride resin; 1. Wallpaper having an anti-dust function, comprising: a surface functional layer formed of a coating film containing polyether ester or a derivative thereof, and a vinyl chloride-based copolymer and / or an acrylic acid ester-based copolymer, the content of said vinyl chloride-based copolymer and / or acrylic acid ester-based copolymer being greater than the content of said polyether ester or a derivative thereof.

6. 6. The wallpaper according to claim 4 or 5, wherein the polyetherester or a derivative thereof comprises a polyetherester or a derivative thereof represented by chemical formula (V): 【Chemistry 3】 R ａ represents a straight-chain or branched alkylene group having 1 to 10 carbon atoms. l ３ is 1 to 10, n ３ is between 1000 and 10000.

7. A step of forming a coating film containing a polyvinyl chloride resin and a foaming agent on a substrate; forming a coating film containing a polyamide derivative having a polyether group to form a surface functional layer; and a step of foaming the coating film containing the polyvinyl chloride resin to form a foamed resin layer, thereby producing wallpaper having an anti-dust function.

8. A step of forming a coating film containing a polyvinyl chloride resin and a foaming agent on a substrate; A step of forming a coating film containing a polyether ester or a derivative thereof to form a surface functional layer; and a step of foaming the coating film containing the polyvinyl chloride resin to form a foamed resin layer, thereby producing wallpaper having an anti-dust function.

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