Wallpaper, methods for manufacturing wallpaper

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 an anti-dust function and a method for manufacturing the same.

Background Art

[0002] Wallpaper, also referred to as cloth, is an interior finishing material that is pasted onto a finished surface such as a wall or ceiling for the purpose of protecting the base and decoration. Wallpaper generally has a structure in which a foamed resin layer and a surface functional layer are laminated on a base paper. The foamed resin layer is a layer obtained by foaming a polyvinyl chloride resin or the like. The surface functional layer is a layer that imparts functions such as matte finish, water repellency, deodorization, and antibacterial property to the wallpaper surface.

[0003] Wallpaper is generally formed by applying a polyvinyl chloride resin composition containing a foaming agent onto the surface of a base paper to form a film, and then applying a raw material corresponding to the function to be imparted to the wallpaper surface onto the film to form a film. Then, the polyvinyl chloride resin layer is foamed by heating to form a foamed resin layer. When forming an uneven pattern on the wallpaper surface, embossing with heating is further performed.

[0004] However, wallpaper may be soiled by the adhesion of fine particles (dust) floating in the air such as dust and pollen to the surface. In particular, soiling is likely to occur around ventilation openings or windows where air flow can occur, or in corners of rooms where dust tends to accumulate. Some wallpapers have an antifouling function as described in Patent Document 2, but the anti-dust function of suppressing the adhesion of dust to the surface is not sufficient. Therefore, wallpapers having an anti-dust function have not been put into practical use as products.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] The present invention was made based on these circumstances, and its purpose is to provide wallpaper having an anti-dust function that can suppress dust from adhering to the surface, and a method for manufacturing the same.

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

[0008] The gist of this invention is as follows: (1) The wallpaper of the present invention comprises a foamed resin layer containing polyvinyl chloride resin, The invention is characterized by comprising a surface functional layer formed with a coating film containing a polyamide derivative having a polyether group, and having an anti-dust function. (2) The wallpaper of the present invention comprises a foamed resin layer containing polyvinyl chloride resin, The invention is characterized by comprising a surface functional layer formed from a coating film containing a polyamide derivative having a polyether group and a vinyl chloride copolymer and / or an acrylic acid ester copolymer, wherein the content of the vinyl chloride copolymer and / or acrylic acid ester copolymer is greater than the content of the polyamide derivative, and having an anti-dust function. (3) The polyamide derivative having a polyether group includes a polyether ester amide represented by chemical formula (I) or (II) or a derivative thereof, or a polyether polyamide represented by chemical formula (III) or (IV) or a derivative thereof. [ka] R a This represents a linear or branched alkylene group having 1 to 10 carbon atoms. l1 is between 1 and 10, m1 is between 1 and 10, and n1 is between 1000 and 10000. x1 is between 1 and 10. [ka] l2 is 1-10, m2 is 1-10, and n2 is 1000-10000. x² is between 1 and 10. (4) The wallpaper of the present invention comprises a foamed resin layer containing polyvinyl chloride resin, The invention is characterized by comprising a surface functional layer formed of a coating film containing a polyether ester or a derivative thereof, and having an anti-dust function. (5) The wallpaper of the present invention comprises a foamed resin layer containing polyvinyl chloride resin, The invention is characterized by comprising a surface functional layer formed from a coating film containing a polyether ester or a derivative thereof and a vinyl chloride copolymer and / or an acrylic acid ester copolymer, wherein the content of the vinyl chloride copolymer and / or acrylic acid ester copolymer is greater than the content of the polyether ester or its derivative, and having an anti-dust function. (6) The polyether ester or derivative thereof includes the polyether ester or derivative thereof represented by chemical formula (V). [ka] R a This represents a linear or branched alkylene group having 1 to 10 carbon atoms. l3 ranges from 1 to 10, and n3 ranges from 1000 to 10000. (7) The method for manufacturing wallpaper of the present invention comprises the steps of forming a coating film containing polyvinyl chloride resin and a foaming agent on a substrate, A step of forming a coating film containing a polyamide derivative having a polyether group to form a surface functional layer, The method for producing wallpaper having an anti-dust function includes a step of foaming the coating film containing the polyvinyl chloride resin to form a foamed resin layer. (8) The method for manufacturing wallpaper of the present invention comprises the steps of forming a coating film containing polyvinyl chloride resin and a foaming agent on a substrate, Forming a coating film containing a polyether ester or its derivative to serve as a surface functional layer; Foaming the coating film containing the polyvinyl chloride resin to form a foamed resin layer, and characterized by manufacturing a wallpaper having an anti-dust function.

Advantages of the Invention

[0009] The wallpaper of the present invention is provided with 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, whereby, for example, dust floating in the air is suppressed from adhering to the surface. As a result, as a commercialized product, it becomes possible to provide consumers and wholesalers with wallpaper having an anti-dust function. Instead of the polyamide derivative having a polyether group, a surface functional layer formed of a coating film containing a polyether ester or its derivative can also realize wallpaper having an anti-dust function.

[0010] Further, the wallpaper of the present invention is formed of a foamed resin layer containing a polyvinyl chloride resin and a coating film containing a polyamide derivative having a polyether group, a vinyl chloride-based copolymer and / or an acrylate-based copolymer, and the content of the vinyl chloride-based copolymer and / or the acrylate-based copolymer is more than the content of the polyamide derivative. By providing a surface functional layer, it becomes possible to provide wallpaper with improved durability in addition to the anti-dust function. Instead of the polyamide derivative having a polyether group, a surface functional layer formed of a coating film containing a polyether ester or its derivative can also realize wallpaper with improved durability in addition to the anti-dust function.

Brief Description of the Drawings

[0011] [Figure 1] It is a longitudinal sectional view of the wallpaper according to an embodiment of the present invention. [Figure 2] It is a plan view of the above wallpaper. [Figure 3] It is a flowchart showing the manufacturing process of the wallpaper according to an embodiment of the present invention. [Figure 4] This diagram illustrates the surface treatment process within the manufacturing process described above. [Figure 5] This diagram illustrates the embossing process within the manufacturing process described above. [Figure 6] The results of the examples and comparative examples conducted to confirm the effects of this embodiment are shown below. [Figure 7] The results of the examples and comparative examples conducted to confirm the effects of this embodiment are shown below. [Figure 8] The results of the examples and comparative examples conducted to confirm the effects of this embodiment are shown below. [Figure 9] The results of an example conducted to confirm the effects of this embodiment are shown below. [Figure 10] The results of an example conducted to confirm the effects of this embodiment are shown below. [Figure 11] The results of an example conducted to confirm the effects of this embodiment are shown below. [Modes for carrying out the invention]

[0012] Hereinafter, wallpaper and a method for manufacturing 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 shall not be limited in any way by the embodiments described below.

[0013] (First Embodiment) As shown in Figure 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 that order on a base paper that serves as a base material 11. The foamed resin layer 12 and the surface functional layer 13 may be integrally embossed while laminated on the base material 11 to form a raised and recessed pattern on the surface. For the sake of illustration, aligned raised and recessed areas are shown, but the raised and recessed pattern can be a fabric-like (woven) pattern, a stone-like pattern, a geometric pattern, or any other arbitrary pattern. Although not shown in the illustration, patterns, figures, text, etc. may also be printed on the wallpaper.

[0014] The base material 11 is, for example, a sheet material such as paper, woven fabric, knitted fabric, or nonwoven fabric. The base material 11 may be made of a single material or of multiple materials. The thickness of the base material 11 is, for example, 0.09 to 0.15 mm. The wallpaper 1 is attached by adhering the back side of the base material 11 to a surface to be finished, such as a wall or ceiling, with adhesive, for example. The back side of the base material 11 may be left exposed, or it may have an adhesive layer for attachment to the surface to be finished, and a release sheet may be provided to protect the adhesive layer.

[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 an optional additive 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 the optional additives, such as a plasticizer, stabilizer, filler, antifungal agent, or colorant. It may also contain residual components of the added foaming agent. Therefore, "mainly composed of polyvinyl chloride resin" means that the polyvinyl chloride resin content 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] As an example, polyvinyl chloride resin with an average degree of polymerization (JIS K 6720-2) of 700 or higher is used. When expressed in K values, for example, it is 60.3 or higher. Preferably, the average degree of polymerization is 700 to 1300 (K value: 60.3 to 70.4).

[0017] The blowing agent used is, for example, one that foams when heated. Preferred examples of blowing agents include azo-based blowing agents such as azodicarbonamide and hydrazide-based blowing agents such as oxybisbenzenesulfonyl hydrazide. The blowing agent content is, for example, 1 to 5 parts by mass per 100 parts by mass of polyvinyl chloride resin. When using polyvinyl chloride resin with an average degree of polymerization of 700 or higher to enhance the design, the blowing agent content is adjusted, for example, so that the foaming ratio is 2 to 8 times.

[0018] Fillers include, for example, calcium carbonate, talc, silica, and carbon black. The filler content is, for example, 10 to 150 parts by mass per 100 parts by mass of polyvinyl chloride resin. Plasticizers include, for example, dioctyl phthalate (DOP) and diisononyl phthalate (DINP). The plasticizer content is, for example, 30 to 80 parts by mass per 100 parts by mass of polyvinyl chloride resin. Stabilizers include, for example, zinc-based compounds. The stabilizer content is, for example, 2 to 5 parts by mass per 100 parts by mass of polyvinyl chloride resin. Antifungal agents include, for example, industrial preservatives and antifungal agents. The antifungal agent content is, for example, 0.1 to 3.0 parts by mass per 100 parts by mass of polyvinyl chloride resin. Colorants include, for example, titanium and organic pigments. The colorant content is, for example, 10 to 20 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0019] The surface functional layer 13 is a functional layer containing components corresponding 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 an aqueous solution with water as the solvent. An 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 simplification of terminology, it may simply be referred to as a "polyamide derivative." However, the function to be imparted to the wallpaper surface may include not only an anti-dust function but also other functions such as matte finish, water repellency, deodorizing properties, and antibacterial properties. Therefore, the surface functional layer 13 contains one or more components corresponding 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 by dispersing it so that the foamed resin layer 12 is exposed in a plan view, or it may be formed to cover the entire surface of the foamed resin layer 12. Figure 2 schematically shows a wallpaper surface to which the liquid raw material has been applied. Figure 2(a) is an example in which the foamed resin layer 12 is applied by dispersing it so that its surface is exposed. Figure 2(b) is an example in which the foamed resin layer 12 is applied to cover the entire surface. Note that Figure 2(a) shows an example of a regular arrangement of diamonds, but is not limited to this. Regular arrangements of circles, ellipses, squares, polygons, etc., are also acceptable, as are irregular arrangements. Also, the length of the diagonal of the diamond in Figure 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 film. However, when forming a film by applying a liquid raw material, the outline of the dispersed surface functional layer 13 may become blurred, and even if applied to cover the entire surface, it may not be completely covered. When the average degree of polymerization of the polyvinyl chloride resin is 1000 or higher, it is preferable to expose the surface of the foamed resin layer 12, as shown in Figure 2(a). This is because it can suppress the occurrence of punctures during embossing. In this case, it is preferable that the surface functional layer 13 occupies 50% to 80% per unit area in a plan view. If it exceeds 80%, punctures and gas accumulation during embossing cannot be sufficiently suppressed, and conversely, if it falls below 50%, the function of the surface functional layer 13 may not be fully exhibited.

[0022] The dust that is prevented from adhering by the anti-dust function is solid particulate matter suspended in the air. This includes not only particles floating in the air, but also those that float on air currents created by ventilation, etc. Furthermore, it also includes particles that accumulate in places such as the corners of a room. Specific examples of dust include dust, sand, lint, tar, pollen, etc., but the type is not limited to these. House dust and particles larger than house dust are also included.

[0023] The imparting and improvement of anti-dust functionality can be achieved by incorporating a polyamide derivative having a polyether group into the surface functional layer 13. A preferred example of a polyamide derivative having a polyether group is a polyether ester amide that can be represented by the following chemical formula (I) or (II). Alternatively, a derivative thereof may also be used. That is, it may be a compound (derivative) that has been modified to an extent that does not significantly alter the parent structure or properties of the polyether ester amide, for example, by introducing a functional group, oxidation, reduction, or substitution of atoms. [ka] R aThis refers to linear or branched alkylene groups having 1 to 10 carbon atoms, such as methylene, ethylene, trimethylene, propylene, methylmethylene, dimethylmethylene, ethylmethylene, ethylmethylmethylene, tetramethylene, ethylethylene, and pentamethylene. l1 is 1 to 10, m1 is 1 to 10, n1 is 1000 to 10000, and x1 is 1 to 10.

[0024] Polyether ester amides can be those produced by a bonding reaction between polyether polyamide and polyglycol. Therefore, the polyamide derivative having a polyether group to be included in the surface functional layer 13 may include 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 a derivative thereof. That is, it may be a compound (derivative) that has been modified to an extent that does not significantly change the parent structure or properties of the polyether polyamide, for example by introducing functional groups, oxidation, reduction, or substitution of atoms. It may also contain polyether polyamide but not polyether ester amide. [ka] l2 is 1-10, m2 is 1-10, and n2 is 1000-10000. x² is between 1 and 10.

[0025] The polyamide derivative having a polyether group to be included in the surface functional layer 13 is preferably, but not limited to, the polyether ester amide or polyether polyamide represented by the chemical formula described above. However, it is preferable that it has both a polyether group and a polyamide group. It is presumed that the anti-dust function on the wallpaper surface was made reliable, as can be seen from the test results of the examples described later, due to the synergistic effect of the moisture-absorbing effect of the polyether group in the polyamide derivative and the conductive effect due to the cationic properties of the polyether structure, in which electrolytes and ionic substances act as an electrolyte. 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, if 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. Preferably, it is 1.2 to 4.0% by mass. Considering the cost, 1.4 to 2.0% by mass is more preferable.

[0026] The surface functional layer 13 can be provided with the function of a surface protective layer that prevents scratches on the wallpaper surface. In this embodiment, the protective function of the wallpaper surface can be enhanced in addition to the anti-dust function. 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 a vinyl chloride copolymer and / or an acrylic acid ester copolymer resin into the surface functional layer 13 and adjusting the content in the surface functional layer 13. Preferred examples of vinyl chloride copolymers and acrylic acid ester copolymers are copolymers of vinyl chloride and acrylic acid ester. Among these, the vinyl chloride copolymer is, for example, one in which the copolymer amount of vinyl chloride is increased to emphasize the properties of vinyl chloride. The acrylic acid ester copolymer is, for example, one in which the copolymer amount of acrylic acid ester is increased to emphasize the properties of acrylic acid ester.

[0028] As shown in the test results described later, the vinyl chloride copolymer and / or acrylic acid ester copolymer resins can maintain their anti-dust function and enhance the protective function of the wallpaper surface by changing the formulation. Specifically, the content of the vinyl chloride copolymer and / or acrylic acid ester copolymer 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 100% by mass, if the surface functional layer 13 contains a polyamide derivative having a polyether group, a vinyl chloride copolymer and / or acrylic acid ester copolymer, and silica. 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 the vinyl chloride copolymer is 35% by mass or more and less than 60% by mass. In the case of a durable product that is more conscious of 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 acid ester copolymer. If both vinyl chloride copolymer and acrylic acid ester copolymer are included, the total amount is used.

[0029] The surface functional layer 13, if it contains a vinyl chloride copolymer and / or an acrylic acid ester copolymer, preferably also contains silica. Amorphous silica is even more preferred. Silica primarily has the effect of matting 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 silica content is, for example, 35% by mass or more, preferably 35 to 64% by mass, based on the total amount of these components being 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 silica content is greater than 38% by mass and 40% by mass or less. In the case of a product with improved durability, the silica content is 35% by mass or more and 38% by mass or less. The blending ratio (on a mass basis) of vinyl chloride copolymer and silica is preferably 50 parts by mass or more of silica per 100 parts by mass of vinyl chloride copolymer. More preferably, the silica content is 55 to 67 parts by mass per 100 parts by mass of vinyl chloride copolymer.

[0030] The surface functional layer 13 may further contain at least one component selected from the group consisting of nonionic surfactants, ionic surfactants, ionic polymers, acidic compounds, basic compounds, and preservatives. Preferably, it is a preservative. Examples of preservatives include isodiazoline, bromonitropropanediol, etc.

[0031] As previously described, vinyl chloride copolymers and / or acrylic acid ester copolymers can enhance the protective function of wallpaper surfaces by changing their formulation. Other functions, such as water repellency, can be achieved by incorporating a water-repellent agent into the surface functional layer 13. Examples of water-repellent agents include fluorine-containing acrylic resin-based water-repellent agents and silicone emulsion-based water-repellent agents.

[0032] Although not mandatory, if printing is to be applied to wallpaper 1, it will be done using methods such as gravure printing or flexographic printing. The printing is applied to the surface of the surface functional layer 13, or to the surface of the foamed resin layer 12 before the surface functional layer 13 is formed. The ink used for printing includes, for example, a colorant, adhesive resin, and solvent. Of course, the design or pattern to be printed is arbitrary and there are no limitations on the design.

[0033] Next, an example of a method for manufacturing wallpaper 1 according to this embodiment will be described with reference to Figure 3. As shown in Figure 3, the method for manufacturing wallpaper 1 includes a raw material compounding step Act 10, a coater step Act 11 for forming a layer of polyvinyl chloride resin containing a foaming agent, a surface treatment step Act 12 for forming a surface functional layer 13, a foaming step Act 13 for foaming the polyvinyl chloride resin layer, an embossing step Act 14 for forming an uneven pattern, and an inspection step Act 15.

[0034] The compounding process Act 10 involves mixing polyvinyl chloride resin, a foaming agent, and any additives such as plasticizers, stabilizers, fillers, antifungal agents, and colorants in predetermined proportions, and stirring them with a blender or dissolver to produce a paste-like sol.

[0035] The coater process Act 11 involves applying a thin, uniform layer of the obtained paste-like sol to the surface of the substrate 11 and then heating it to gel it. This process forms a resin layer 2 containing a foaming agent mainly composed of polyvinyl chloride resin. The paste-like sol is applied, for example, by a roll coater. The heating temperature is such that the foaming agent does not foam, but also promotes gelation. In continuous processing, the substrate 11 is prepared in advance on a roll, and its leading end is pulled out and sent to the roll coater. The roll coater conveys the substrate 11 with a rotating roll while applying the paste-like sol to the surface of the substrate 11. Furthermore, the conveyed substrate 11 is heated by a heating device, and a resin layer 2 mainly composed of polyvinyl chloride resin is formed. The substrate 11 with the resin layer 2 mainly composed of polyvinyl chloride resin becomes the raw material for the wallpaper 1. The raw material is again wound into a roll and sent to the next process.

[0036] Surface treatment step Act 12 is a step of forming a film on the surface of a resin layer 2 containing a foaming agent mainly composed of polyvinyl chloride resin by, for example, applying and drying a liquid raw material for the surface functional layer 13. 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 multiple solutions. For example, in the case of a standard product mainly for anti-dust function, it is prepared by mixing a first liquid raw material containing a polyamide derivative having a polyether group and a solvent with a second liquid raw material containing a vinyl chloride copolymer and a solvent. In this case, an aqueous solution with water as the solvent is preferred.

[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 about 10% by mass, for example. A preferred example is a polyether ester amide that can be represented by the chemical formula (I) or (II) described above, which is contained in an amount of about 10% by mass. Alternatively, a polyether polyamide represented by the chemical formula (III) or (IV) is contained in an amount of about 10% by mass. Alternatively, both polyether ester amide and polyether polyamide are contained in an amount of about 10% by mass in total (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 with water as the solvent is preferred. The copolymer of vinyl chloride and an acrylic acid ester is an example of the vinyl chloride copolymer described above, in which the copolymer amount of vinyl chloride is increased to emphasize the properties of vinyl chloride. The second liquid raw material contains, for example, about 15% by mass of the vinyl chloride copolymer and, for example, about 10% by mass of amorphous silica (hereinafter referred to as "liquid raw material B").

[0039] For products with enhanced durability, a third liquid raw material is 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 acid ester, and further contains amorphous silica. An aqueous emulsion with water as the solvent is preferred. The copolymer of vinyl chloride and acrylic acid ester, like the second liquid raw material, has a high copolymer amount of vinyl chloride to emphasize the properties of vinyl chloride, and is an example of a vinyl chloride copolymer. Both the second and third liquid raw materials contain a vinyl chloride copolymer and amorphous silica, but at different concentrations. The third liquid raw material contains, for example, about 20% by mass of vinyl chloride copolymer and about 10% by mass of amorphous silica (hereinafter referred to as "liquid raw material C").

[0040] The following is an example of the mixing ratio of "Liquid Raw Material A," "Liquid Raw Material B," and "Liquid Raw Material C" for the standard product and the enhanced durability product. (1) Standard product Liquid raw material A=4.17 parts by mass Liquid raw material B=100 parts by mass <Surface functional layer 13 contains 1.7% by mass of polyamide derivative, 59% by mass of vinyl chloride copolymer, and 39.3% by mass of amorphous silica> (2) Durable items 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 <Surface functional layer 13 contains 1.6% by mass of polyamide derivative, 61.3% by mass of vinyl chloride copolymer, and 37.1% by mass of amorphous silica> Regarding the enhanced durability version, the reason for using 50 parts by mass each of "Liquid Raw Material B" and "Liquid Raw Material C" instead of 100 parts by mass of "Liquid Raw Material C" is that, after actually producing prototypes and conducting tests, it was found that using 50 parts by mass each of "Liquid Raw Material B" and "Liquid Raw Material C" resulted in better anti-dust function and wallpaper surface protection function.

[0041] Liquid raw material B, an example of the second liquid raw material, and liquid raw material C, an example of the third liquid raw material, contain a "polymer of vinyl chloride and acrylic acid ester (an example of a vinyl chloride-based copolymer)" in which the copolymer amount of vinyl chloride is increased to emphasize the properties of vinyl chloride, as described above. However, instead, they may contain a "polymer of vinyl chloride and acrylic acid ester (an example of an acrylic acid ester-based copolymer)" in which the copolymer amount of acrylic acid ester is increased to emphasize the properties of acrylic acid ester. In this case as well, an aqueous emulsion with water as the solvent is preferred. 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 material A and liquid raw material D is as follows. Liquid raw material A=4.17 parts by mass Liquid raw material D=100 parts by mass <Surface functional layer 13 contains 1.8% by mass of polyamide derivative, 85.4% by mass of acrylic ester copolymer, and 12.8% by mass of amorphous silica>

[0042] In yet another example, as the second liquid raw material, instead of the vinyl chloride-acrylic ester copolymer described above, an emulsion of an acrylic ester copolymer that does not contain vinyl chloride may be used. In this case as well, an aqueous emulsion with water as the solvent is preferred. In yet another example, the second liquid raw material contains, for example, about 7.5% by mass of the acrylic ester copolymer and, for example, about 0.7% by 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 <Surface functional layer 13 contains 5.0% by mass of polyamide derivative, 86.9% by mass of acrylic ester copolymer, and 8.1% by mass of amorphous silica>

[0043] Liquid raw material A can be, for example, "New Luster P-25N," a product of Nisshin Chemical Research Institute Co., Ltd. Liquid raw material B can be, for example, "Vinibran HD-057," a product of Nisshin Chemical Industry Co., Ltd. Liquid raw material C can be, for example, "Vinibran SI-07," a product of Nisshin Chemical Industry Co., Ltd. Liquid raw material D can be, for example, "Vinibran 897," a product of Nisshin Chemical Industry Co., Ltd. Liquid raw material E can be, for example, a 2x diluted aqueous solution of "Mica Primer EC-0712 Concentrate." "Vinibran" is a registered trademark of Nisshin Chemical Industry Co., Ltd., etc.

[0044] As schematically shown in Figure 4, the liquid raw material R of the surface functional layer 13, prepared using 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 supply machine 32, and a doctor blade 33. After supplying the liquid raw material R to the surface of the mesh roll 3, the excess liquid raw material R is scraped off with the doctor blade 33, leaving a liquid film of the liquid raw material R on the surface of the mesh roll 3. The surface functional layer 13 is formed by transferring a liquid film of the liquid raw material R to the surface of the resin layer 2, which is mainly composed of polyvinyl chloride resin. When forming the surface functional layer 13 dispersed on the surface of the foamed resin layer 12, as shown in Figure 2(a), it is preferable to use the bias mesh roll disclosed in Japanese Patent Publication No. 6713241 by the present applicant.

[0045] The foaming process Act 13 is a process in which the resin layer 2, which mainly consists of polyvinyl chloride resin containing a foaming agent, is transformed into a foamed resin layer 12 by heating it to 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 process Act 12, a surface functional layer 13 is formed using a bias mesh roll, so that any excess gas or vapor generated by the foaming of the foaming agent in the foaming process Act 13 is discharged from within the foamed resin layer 12.

[0046] The embossing process Act 14, as schematically shown in Figure 5, involves heating the surface of the substrate 11, on which the foamed resin layer 12 and the surface functional layer 13 are formed, to a temperature at which the polyvinyl chloride resin softens, and simultaneously gripping and conveying it with a pair of upper and lower embossing rolls 4 and a backup roll 41 to form an uneven pattern on its surface. In other words, it is a process of integrally embossing the foamed resin layer 12 and the surface functional layer 13. The surface of the embossing roll 4 has irregularities corresponding to the uneven pattern to be formed. The sheet surface temperature due to 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 addition to the film formation of the surface functional layer 13 using the bias mesh roll described above, needle embossing may also be performed to prevent punctures in the foamed resin layer 12 during embossing.

[0047] Inspection process Act 15 is a process to check whether the manufactured wallpaper 1 meets the product requirements without any problems. The inspection is carried out by visual inspection by inspectors and mechanical inspection such as foreign object detection machines.

[0048] As described above, the wallpaper 1 according to the above embodiment includes a foamed resin layer 12 containing polyvinyl chloride resin and a surface functional layer 13 formed from a coating film containing a polyamide derivative having a polyether group, thereby suppressing the adhesion of airborne dust to the surface. As a result, it becomes possible to provide the wallpaper 1 with anti-dust functionality to consumers and wholesalers as a commercialized product.

[0049] Furthermore, according to the above-described embodiment of wallpaper 1, by comprising 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 acid ester copolymer, wherein the content of the vinyl chloride copolymer and / or acrylic acid ester copolymer is greater than the content of the polyamide derivative, it is possible to provide wallpaper 1 that is resistant to scratches in addition to having an anti-dust function.

[0050] (Second Embodiment) The wallpaper 1 having anti-dust functionality may have a surface functional layer 13 formed of a coating film containing polyether ester or its derivative, instead of a "polyamide derivative having a polyether group," such as polyether ester amide or polyether polyamide. The polyether ester or its derivative ensures anti-dust functionality on the wallpaper surface through a synergistic effect of the moisture-absorbing effect of the polyether group and the conductive effect of the polyether structure, where electrolytes and ionic substances act as an electrolyte. In other words, even if a surface functional layer 13 formed of a coating film containing polyether ester is used, wallpaper 1 having anti-dust functionality equivalent to that of the first embodiment can be realized. This is because the polyether group portion contributes to the manifestation of anti-dust functionality on the wallpaper surface. Among polyether esters, the polyether ester that can be represented by the following chemical formula (V) is preferred for imparting anti-dust functionality. Alternatively, a derivative thereof may also be used. In other words, the compound (derivative) may be one which has been modified to an extent that does not significantly alter the parent structure or properties of the polyether ester, for example, by introducing functional groups, oxidation, reduction, or substitution of atoms. [ka] R a This represents a linear or branched alkylene group having 1 to 10 carbon atoms. l3 ranges from 1 to 10, and n3 ranges from 1000 to 10000.

[0051] In this embodiment, the first liquid raw material preferably includes a polyether ester that can be represented by chemical formula (V) and a solvent. The polyether ester is contained in an amount of approximately 10% by 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" for the standard product and the durable product. The manufacturing process of wallpaper 1 is the same as in the first embodiment, except that liquid raw material A is replaced with liquid raw material A'. (1) Standard product Liquid raw material A'=4.17 parts by mass Liquid raw material B=100 parts by mass <Surface functional layer 13 contains 1.7% by mass of polyether ester, 59% by mass of vinyl chloride copolymer, and 39.3% by mass of amorphous silica> (2) Durable items 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 <Surface functional layer 13 contains 1.6% by mass of polyether ester, 61.3% by mass of vinyl chloride copolymer, and 37.1% by mass of amorphous silica>

[0052] (Third embodiment) The first and second embodiments described above describe wallpaper 1 (standard product, enhanced durability product) that maintains anti-dust functionality and also enhances the protective function of the wallpaper surface, as preferred examples. However, as shown in the results of the examples described later, the anti-dust functionality of wallpaper 1 can be imparted to and improved as long as the surface functional layer 13 contains "polyamide derivative having a polyether group" and / or "polyether ester or its derivative" as essential components. In other words, the anti-dust functionality can be exhibited even if the surface functional layer 13 is composed only of "polyamide derivative having a polyether group" and / or "polyether ester or its derivative". Therefore, the other components included in the surface functional layer 13 are not limited to the embodiments described above. Even if various components are included in the surface functional layer 13, it is sufficient if, for example, 1% by mass or more, preferably 1.2 to 4.0% by mass, of "polyamide derivative having a polyether group" and / or "polyether ester or its derivative" is included. [Examples]

[0053] Next, we will describe an example that was carried out to confirm the effects of this embodiment. (Evaluation Test 1) In Evaluation Test 1, wallpapers 1 of Examples 1 to 5 were manufactured by changing the mixing ratio of liquid raw materials A to E that form the surface functional layer 13, and the anti-dust function of each wallpaper 1 was evaluated. To evaluate the anti-dust function, a 4cm x 4cm test piece of each manufactured wallpaper 1 was placed in a container with 0.5g of dust and forced to adhere within the container. After adhesion, the excess dust was lightly brushed off to evaluate the anti-dust function. The evaluation was performed using a grayscale for contamination (JIS L 0805), and the average evaluation (n=5) was used. Pollen (simulated pollen: cedar and cypress flowers were assumed) was used as the dust. As a comparison with each of Examples 1 to 5, the same test was performed on wallpapers (Comparative Examples 1 to 5) manufactured using liquid raw materials prepared without polyamide derivatives containing polyether groups. That is, the difference in dust adhesion due to the presence or absence of polyamide derivatives containing polyether groups (other components were the same) was confirmed. The mixing ratios of the liquid raw materials for each wallpaper are as follows.

[0054] Liquid raw material A was "New Luster P-25N", liquid raw material B was "Vinibran HD-057", liquid raw material C was "Vinibran SI-07", liquid raw material D was "Vinibran 897", and liquid raw material E was a 2x 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 <Surface functional layer 13 contains 1.7% by mass of polyamide derivative, 59% by mass of vinyl chloride copolymer, and 39.3% by mass of amorphous silica> • Example 2 (Durability-enhanced 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 <Surface functional layer 13 contains 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 (Durability-enhanced version B) Liquid raw material A=4.17 parts by mass Liquid raw material C=100 parts by mass <Surface treatment layer 13 contains 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 <Surface functional layer 13 contains 1.8% by mass of polyamide derivative, 85.4% by mass of acrylic 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 <Surface functional layer 13 contains 5.0% by mass of polyamide derivative, 86.9% by mass of acrylic 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 <100% by mass of polyamide derivative in surface treatment layer 13>

[0056] • Comparative Example 1 Liquid raw material B=100 parts by mass <Surface functional layer 13 contains 60% by mass of vinyl chloride copolymer and 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 <Surface functional layer 13 contains 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 <Surface functional layer 13 contains 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 contains 87% by mass of acrylic ester copolymer and 13% by mass of amorphous silica> • Comparative Example 5 Liquid raw material E=100 parts by mass <Surface functional layer 13 contains 91.5% by mass of acrylic ester copolymer and 8.5% by mass of amorphous silica> • Comparative Example 6 The surface functional layer 13 is absent, and the foamed resin layer 12 is fully exposed.

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

[0058] The results of Evaluation Test 1 are shown in Figure 6. As shown in Figure 6, the evaluation results using the grayscale for contamination (JIS L 0805) showed that all of Examples 1 to 5 were rated 2 grades higher, including half grades, than the corresponding Comparative Examples 1 to 5. In other words, by including 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 commercially available wallpapers have surface functional layers formed from various components depending on the function to be imparted, such as matte finish, water repellency, deodorizing properties, and antibacterial properties, but applying this technology has the advantage of being able to impart and improve the anti-dust function to any wallpaper. Among them, the standard product and the durability-enhanced product A, which are examples of the first embodiment, received evaluation results of grade 4-5 and grade 4, respectively. The evaluation is grade 1 to 5, which indicates that it exhibits extremely excellent anti-dust function. Moreover, all of the wallpapers 1 also have a protective function for the wallpaper surface.

[0059] Furthermore, when comparing durable product A and durable product B, durable product A showed superior anti-dust function. Upon investigating this difference, it was found that the protective function of the wallpaper surface improved as the amount of vinyl chloride copolymer increased, but the anti-dust function decreased once the amount of vinyl chloride copolymer exceeded a certain level. This tendency was particularly evident in wallpaper 1, which has an embossed surface. It is speculated that the mixing ratio of vinyl chloride copolymer and silica is related to this. Specifically, the mixing ratio (on a mass basis) of vinyl chloride copolymer and silica is preferably greater than 50 parts by mass of silica for every 100 parts by mass of vinyl chloride copolymer. More preferably, the silica is 55 to 67 parts by mass for every 100 parts by mass 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 durable product A from Example 2 and the wallpaper from Comparative Example 3. The dust used in the test was as follows: • Dust 1: Cotton dust (Test cotton dust: JIS S 3031) • Dust 2: Pollen (Simulated pollen: Assuming cedar and cypress blossoms) The anti-dust function was evaluated in the same way as in Evaluation Test 1. A 4cm x 4cm test piece of the fabricated wallpaper 1 was placed in a container with 0.5g of dust and forced to adhere within the container. After adhesion, the excess dust was lightly brushed off to evaluate the anti-dust function. The evaluation was performed using a grayscale for contamination (JIS L 0805), and the average evaluation (n=5) was used.

[0061] The test results for Dust 1 and Dust 2 are shown in Figure 7. As shown in Figure 7, the evaluation results for Durability Enhanced Product A of Example 2 using the contamination grayscale (JIS L 0805) were Grade 4 for both Dust 1 and Dust 2. In contrast, the evaluation results for Comparative Example 3 were Grade 2-3 for Dust 1 and Grade 2 for Dust 2. In other words, it was confirmed that the wallpaper 1 of 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, the wallpaper 1 of the durable product A from Example 2 and the wallpaper from Comparative Example 3 were actually applied to the wall around the ventilation fan, and their anti-dust function was evaluated. Figure 8 shows the condition after 17 months from the start of the test. As is clear from the results in Figure 8, it was confirmed that the wallpaper 1 of the durable product A from Example 2 can maintain its anti-dust function over a long period of time.

[0063] (Evaluation Test 4) The surface strength of the standard wallpaper 1 from Example 1 and the enhanced durability wallpaper A from Example 2 were evaluated. The evaluation method followed the Wallpaper Industry Association's "Surface-Reinforced Wallpaper Performance Standards," where a 200g load was applied to the surface of wallpaper 1 and passed back and forth five times to evaluate the degree of surface damage. For both the standard product in Example 1 and the enhanced durability product A in Example 2, multiple test pieces were used, and the average evaluation (n=5) was used. The criteria for evaluation are as follows: Grade 5: No particular changes are visible at first glance. Grade 4: Some surface scratches are visible, but there are no relatively large tears in the surface layer. Grade 3: Clearly visible tearing of 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 of 1 cm or more).

[0064] The results of the surface strength evaluation are shown in Figure 9. As shown in Figure 9, the surface strength of the enhanced durability product A wallpaper 1 in Example 2 was equivalent to grade 3 to 4. That is, some test pieces were judged as grade 4, while others were judged as grade 3. In contrast, the surface strength of the standard wallpaper 1 in Example 1 was equivalent to grade 1 to 2. That is, some test pieces were judged as grade 2, while others were judged as grade 1. From these results, it was confirmed that the enhanced durability product A wallpaper 1 has good durability in addition to its anti-dust function. For example, a common reason for replacing wallpaper 1 in rental properties is scratches. The surface-reinforced wallpaper 1 is advantageous because it is less prone 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 for the surface functional layer 13 containing polyether ester was liquid raw material A' as exemplified in the second embodiment. Then, a test piece of wallpaper 1 was prepared in the same manner as in Example 6 described above, and the anti-dust function was evaluated in the same manner as in Evaluation Test 1. The dust used was pollen (simulated pollen: cedar and cypress flowers were assumed) (Dust 2 described above). • Example 7 (Polyether esters only) Liquid raw material A'=100 parts by mass <100% by mass of polyether ester in the surface treatment layer 13>

[0066] The results of Evaluation Test 5 are shown in Figure 10. For comparison, the results of Example 6 and Comparative Example 6 are also shown in Figure 10. As is clear from the results in Figure 10, both Example 7 and Example 6 received evaluation results of grade 3-4. In other words, the surface functional layer 13 containing polyether ester exhibits the same anti-dust function as the surface functional layer 13 containing a polyamide derivative having a polyether group. Although Evaluation Test 5 was conducted with a surface functional layer 13 containing only polyether ester, a product with improved durability by mixing in liquid raw material B, etc., will also exhibit the same anti-dust function.

[0067] (Evaluation Test 6) This test is an evaluation test to reconfirm the expression of anti-dust function by polyether ester amide. Specifically, evaluation tests 1 to 4 used "New Luster P-25N," a product of Nisshin Chemical Research Institute Co., Ltd., as the liquid raw material A. In addition to polyether ester amide, "New Luster P-25N" contains additives such as polyether polyamide, which is an unreacted residue from the manufacturing process, and preservatives. Therefore, a 10% by mass aqueous solution of polyether ester amide alone was obtained from the manufacturer, and the same test as in evaluation test 1 was performed. • Example 8 (Polyether ester amide only) Liquid raw material A (10% by mass aqueous solution of polyether ester amide) = 100 parts by mass <100% by mass of polyether ester amide in the surface treatment layer 13>

[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., using New Luster P-25N) and Comparative Example 6 (without surface functional layer 13). As is clear from the results in Figure 11, Example 8, like Example 6, received an evaluation result of grade 3-4. In other words, it was confirmed that the anti-dust function can be exhibited using only polyether ester amide, excluding unreacted residues and additives.

[0069] Although the present invention has been described in detail above with reference to specific embodiments, it will be apparent to those with ordinary skill in the art that various substitutions, modifications, and changes to the form and details can be made without departing from the spirit and scope of the 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 having a foaming agent mainly composed of polyvinyl chloride resin. 3 Mesh Roll 31 Backup Role 32 Liquid raw material supply machine 33 Doctor Blade R Liquid raw material 4 Embossing Roll 41 Backup Role

Claims

1. A foamed resin layer containing polyvinyl chloride resin, Wallpaper comprising a surface functional layer formed by directly attaching a coating film containing a polyamide derivative having a polyether group to the surface of the foamed resin layer, and characterized by having an anti-dust function.

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

3. The wallpaper according to claim 1 or 2, characterized in that the polyamide derivative having a polyether group includes a polyether ester amide represented by chemical formula (I) or (II) or a derivative thereof, or a polyether polyamide represented by chemical formula (III) or (IV) or a derivative thereof. 【Chemistry 1】 R ａ This represents a linear or branched alkylene group having 1 to 10 carbon atoms. l １ is 1 to 10, m １ is 1 to 10, n １ It is between 1000 and 10000. x １ The range is 1 to 10. 【Chemistry 2】 l ２ is 1 to 10, m ２ is 1 to 10, n ２ It is between 1000 and 10000. x ２ is from 1 to 10.

4. A foamed resin layer containing polyvinyl chloride resin, Wallpaper comprising a surface functional layer formed by directly attaching a coating film containing a polyether ester or a derivative thereof, which is a compound having a polyether group, to the surface of the foamed resin layer, and characterized by having an anti-dust function.

5. A foamed resin layer containing polyvinyl chloride resin, Wallpaper comprising a surface functional layer having an anti-dust function, wherein a coating film containing a polyether ester or a derivative thereof, which is a compound having a polyether group, and a vinyl chloride copolymer and / or an acrylic acid ester copolymer is directly formed on the surface of the foamed resin layer, and the content of the vinyl chloride copolymer and / or acrylic acid ester copolymer is greater than the content of the polyether ester or its derivative.

6. The wallpaper according to claim 4 or 5, characterized in that the polyether ester or derivative thereof includes a polyether ester or derivative thereof represented by chemical formula (V). 【Transformation 3】 R ａ This represents a linear or branched alkylene group having 1 to 10 carbon atoms. l ３ is 1 to 10, n ３ It is between 1000 and 10000.

7. A process of forming a coating film containing polyvinyl chloride resin and a foaming agent on a substrate, A step of forming a coating film containing a polyamide derivative having a polyether group directly on the surface of the coating film containing the polyvinyl chloride resin and foaming agent to form a surface functional layer, A method for manufacturing wallpaper, comprising the step of foaming a coating film containing the polyvinyl chloride resin to form a foamed resin layer, characterized in that wallpaper having an anti-dust function is manufactured.

8. A process of forming a coating film containing 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 directly on the surface of the coating film containing the polyvinyl chloride resin and foaming agent to form a surface functional layer, A method for manufacturing wallpaper, comprising the step of foaming a coating film containing the polyvinyl chloride resin to form a foamed resin layer, characterized in that wallpaper having an anti-dust function is manufactured.

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