Wallpaper

Abstract

To provide a wallpaper having a gross matte feeling and excellent scratch resistance.SOLUTION: A wallpaper 100 comprises a paper base material 10 and a surface resin layer 20 provided on an upper side UP of the paper base material 10. The surface resin layer 20 comprises: a first surface protective layer containing a spherical filler having an average particle size of 3.0 μm or more and 7.0 μm or less; and a second surface protective layer provided on the upper side UP of the first surface protective layer, containing synthetic resin beads or an inorganic compound filler, and having a gloss different from that of the first surface protective layer.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to wallpaper.

Background Art

[0002] Conventionally, as wallpaper used for wall decoration of buildings, etc., there is wallpaper that expresses a gloss-matte feeling by a plurality of surface protection layers having different glosses and has a visual three-dimensional effect.

[0003] As wallpaper having a gloss-matte feeling, there is a gloss-matte decorative sheet described in Patent Document 1. The gloss-matte decorative sheet described in Patent Document 1 has a plurality of surface protection layers formed on the same plane above the pattern printing layer. Since these plurality of surface protection layers have different glosses, the gloss-matte decorative sheet described in Patent Document 1 has a visual three-dimensional effect.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in wallpaper that expresses a gloss-matte feeling by a plurality of surface protection layers having different glosses, if the surface is scratched, the luster changes and the gloss-matte feeling may decrease.

[0006] In view of the above circumstances, an object of the present invention is to provide wallpaper having a gloss-matte feeling and excellent scratch resistance.

Means for Solving the Problems

[0007] In order to solve the above problems, the present invention proposes the following means. The wallpaper of the present invention includes a paper base material and a surface resin layer provided on the upper side of the paper base material. The surface resin layer includes a first surface protection layer containing spherical fillers with an average particle size of 3.0 μm or more and 7.0 μm or less, and a second surface protection layer provided on the upper side of the first surface protection layer, containing synthetic resin beads or inorganic compound fillers and having a different gloss from the first surface protection layer.

[0008] In the above wallpaper, the surface resin layer may have an uneven shape on the surface with a maximum height difference in the vertical direction of 100 μm or less.

[0009] In the above wallpaper, the first surface protection layer and the second surface protection layer may contain a thermosetting resin, an ultraviolet curable resin, or a mixture of a thermosetting resin and an ultraviolet curable resin.

[0010] In the above wallpaper, the surface resin layer further includes a base resin layer provided on the upper side of the paper base material and a printed pattern layer provided on the upper side of the base resin layer. The second surface protection layer may be partially provided on the upper side of the first surface protection layer and provided at a position synchronized with the pattern of the printed pattern layer.

[0011] In the above wallpaper, the base resin layer may contain an aqueous emulsion resin or a vinyl chloride resin.

[0012] In the above wallpaper, the base resin layer may contain a foaming agent.

Advantages of the Invention

[0013] According to the wallpaper of the present invention, it is possible to provide a wallpaper having a gloss-matte feeling and excellent scratch resistance.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying out the Invention

[0015] An embodiment of the present invention will be described with reference to the drawings.

[0016] FIG. 1 is a cross-sectional view schematically showing the wallpaper 100 according to this embodiment. In this embodiment, as shown in FIG. 1, the thickness direction of the wallpaper 100 is defined as the "vertical direction V", the side where the paper base material 10 of the wallpaper 100 is provided is defined as the "lower side LO" in the vertical direction V, and the side opposite to the lower side LO is defined as the "upper side UP" in the vertical direction V.

[0017] The wallpaper 100 includes a paper base material 10 and a surface resin layer 20. The paper base material 10 is a layer provided on the lower side LO of the wallpaper 100. As the paper base material 10, for example, a known fiber sheet used as a paper base material for wallpaper, such as a backing paper for wallpaper, can be adopted.

[0018] The basis weight of the paper base material 10 is preferably 50 g / m 2 or more and 100 g / m 2 or less. Also, the thickness of the paper base material 10 is preferably 80 μm or more and 150 μm or less. Thereby, the wallpaper 100 can obtain sufficient rigidity and prevent the occurrence of curl in the wallpaper 100.

[0019] The surface resin layer 20 is a layer provided on the upper side UP of the paper base material 10. FIG. 2 is a cross-sectional view schematically showing the surface 20s (the upper side UP surface) of the surface resin layer 20.

[0020] The surface 20s of the surface resin layer 20 may be provided with an uneven shape (emboss). This uneven shape is formed, for example, by performing an embossing process in which an embossing roll is pressed against the surface 20s of the surface resin layer 20.

[0021] The concavo-convex shape may be formed by a method of partially foaming with a foam-suppressing ink or a chemical embossing method of partially heating and foaming with hot air or infrared rays.

[0022] On the surface 20s of the surface resin layer 20, the maximum height difference H in the vertical direction V of the concavo-convex shape is preferably 100 μm or less, more preferably 50 μm or less. Here, as shown in FIG. 2, the maximum height difference H indicates the distance in the vertical direction V between the convex portion P1 located at the uppermost side UP and the concave portion P2 located at the lowermost side LO in the concavo-convex shape formed on the surface 20s of the surface resin layer 20.

[0023] The convex portion P1 is, for example, a portion formed by the portion with the deepest plate depth of an embossing plate (embossing roll) that is pressed against the surface 20s of the surface resin layer 20 to form the concavo-convex shape. Specifically, as shown in FIG. 2, when the cross-sectional shape of the surface 20s of the surface resin layer 20 is wavy, the convex portion P1 is the apex of the portion that protrudes most upward (the peak portion).

[0024] The concave portion P2 is, for example, a portion formed by the portion with the shallowest plate depth of an embossing plate that is pressed against the surface 20s of the surface resin layer 20 to form the concavo-convex shape. Specifically, as shown in FIG. 2, when the cross-sectional shape of the surface 20s of the surface resin layer 20 is wavy, the concave portion P2 is the bottom point of the portion that is recessed most downward (the valley portion).

[0025] The concavo-convex shape applied to the surface 20s of the surface resin layer 20 can impart a three-dimensional feel by touch to the wallpaper 100.

[0026] Further, when the surface resin layer 20 is composed of a plurality of layers having different glosses and has a gloss-matte feeling, by setting the maximum height difference H in the vertical direction V of the concavo-convex shape to 100 μm or less, it is possible to suppress the reduction of the gloss-matte feeling.

[0027] FIG. 3 is a cross-sectional view schematically showing the configuration of the surface resin layer 20. The surface resin layer 20 includes a base resin layer 21, a printed pattern layer 22, a first surface protection layer 23, and a second surface protection layer 24.

[0028] The base resin layer 21 is a layer provided on the lower side LO of the surface resin layer 20 and is a layer provided on the upper side UP of the paper base material 10 in the wallpaper 100. As the base resin layer 21, an aqueous emulsion resin, a vinyl chloride resin, or the like can be adopted.

[0029] The coating amount of the base resin layer 21 is preferably 2 80 g / m or more and 2 260 g / m or less. When a vinyl chloride resin is adopted as the base resin layer 21, the coating amount of the base resin layer 21 is limited by the degree of polymerization of the vinyl chloride resin. Further, the degree of polymerization of the vinyl chloride resin is preferably 600 or more. By setting the degree of polymerization of the vinyl chloride resin to 600 or more, the wallpaper 100 can obtain sufficient strength.

[0030] The base resin layer 21 may contain a foaming agent. As the foaming agent to be mixed into the base resin layer 21, a known foaming agent used for wallpapers, such as thermally expandable microcapsules, can be adopted. For example, when thermally expandable microcapsules are mixed into the base resin layer 21 as the foaming agent, the thermally expandable capsules foam by applying heat, and the volume of the base resin layer 21 expands. By foaming the base resin layer 21 with a foaming agent, the thickness of the wallpaper 100 increases, so that sufficient unevenness concealability can be imparted to the wallpaper 100.

[0031] In addition, a plasticizer, a filler, or the like can be appropriately mixed into the base resin layer 21 according to the application. By mixing a plasticizer, a filler, or the like, characteristics such as flexibility or heat resistance can be imparted to the base resin layer 21.

[0032] As a method for laminating the base resin layer 21, a known coating method such as a knife coating method, a nozzle coating method, a die coating method, a lip coating method, a comma coating method, a gravure coating method, a rotary screen coating method, or a reverse roll coating method can be adopted.

[0033] The printed pattern layer 22 is a layer provided on the upper side UP of the base resin layer 21. The printed pattern layer 22 is formed, for example, by applying a pattern such as a wood grain, a stone grain, or a sand grain on the upper side UP of the base resin layer 21.

[0034] The printed pattern layer 22 has a first pattern forming portion 22a and a second pattern forming portion 22b. The first pattern forming portion 22a and the second pattern forming portion 22b form a pattern on the upper side UP of the base resin layer 21, for example, by having different colors for the pigment contained in the ink forming the first pattern forming portion 22a and the pigment contained in the ink forming the second pattern forming portion 22b.

[0035] As a method for forming the printed pattern layer 22, a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing can be adopted. Also, for the first pattern forming portion 22a and the second pattern forming portion 22b, a known printing ink suitable for the adopted printing method can be adopted.

[0036] The first surface protection layer 23 is a layer provided on the upper side UP of the printed pattern layer 22. As the first surface protection layer 23, a thermosetting resin, an ultraviolet curable resin, or a mixture of a thermosetting resin and an ultraviolet curable resin can be adopted. It is preferable to adopt a material that is transparent or translucent to the extent that the pattern of the printed pattern layer 22 can be seen through for the first surface protection layer 23.

[0037] As shown in FIG. 3, the first surface protection layer 23 includes a first particle portion (spherical filler) 23a. The average particle diameter of the first particle portion 23a is 3.0 μm or more and 7.0 μm or less. The first particle portion 23a is, for example, a filler of an inorganic compound such as a silicone resin. By using a filler of an inorganic compound as the first particle portion 23a, it is preferable in terms of hardness compared to the case of using a filler of an organic compound, and an improvement in the hardness of the first surface protection layer 23 can be expected.

[0038] Also, the particle size of the first particle portion 23a and the thickness of the first surface protection layer 23 are preferably substantially the same. By using the first particle portion 23a having a particle size substantially the same as the thickness of the first surface protection layer 23, the scratch resistance of the first surface protection layer 23 can be improved. It is preferable to employ a transparent or translucent material for the first particle portion 23a such that the pattern of the printed pattern layer 22 can be seen through the first surface protection layer 23.

[0039] The difference between the maximum particle size and the minimum particle size in the particle size distribution of the first particle portion 23a is 8 μm or less, preferably 3 μm or less. Further, the first particle portion 23a contained in the first surface protection layer 23 preferably covers 40% or more and 80% or less of the first surface protection layer 23, and more preferably covers the first surface protection layer 23 with substantially no gaps.

[0040] As a method for forming the first surface protection layer 23, known printing methods such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing can be employed. When printing the first surface protection layer 23 mixed with the first particle portion 23a on the upper side UP of the printed pattern layer 22, it is preferable to employ intaglio printing such as gravure printing. Further, the first surface protection layer 23 may be formed using a known coating device.

[0041] The second surface protection layer 24 is a layer provided on the upper side UP of the first surface protection layer 23. Further, the second surface protection layer 24 is partially provided on the upper side UP of the first surface protection layer 23 and is provided at a position synchronized with the pattern of the printed pattern layer 22. For example, the second surface protection layer 24 shown in FIG. 3 is synchronized with the second pattern forming portion 22b of the printed pattern layer 22 and is provided at a position overlapping the second pattern forming portion 22b in a plan view from the upper side UP.

[0042] It is preferable to employ a transparent or translucent material for the second surface protection layer 24 such that the pattern of the printed pattern layer 22 can be seen through the first surface protection layer 23. As the second surface protection layer 24, a thermosetting resin, an ultraviolet curable resin, or a mixture of a thermosetting resin and an ultraviolet curable resin can be employed.

[0043] The first surface protection layer 23 and the second surface protection layer 24 have different glosses. As a method of imparting a difference in gloss between the first surface protection layer 23 and the second surface protection layer 24, there is a method of adding a matting agent to the first surface protection layer 23 or the second surface protection layer 24.

[0044] For example, when a matting agent is added to the first surface protection layer 23 and not added to the second surface protection layer 24, the first surface protection layer 23 has a lower gloss than the second surface protection layer 24. Different amounts of the matting agent may be added to the first surface protection layer 23 and the second surface protection layer 24 to such an extent that a difference in gloss between the first surface protection layer 23 and the second surface protection layer 24 can be imparted. Also, the first surface protection layer 23 and the second surface protection layer 24 may be formed of resins having different glosses.

[0045] Due to the difference in gloss between the first surface protection layer 23 and the second surface protection layer 24, the wallpaper 100 can express a gloss-matte feeling and can visually give a three-dimensional feeling by utilizing the illusion of the human eye.

[0046] As shown in FIG. 3, the second surface protection layer 24 includes a second particle portion 24a. The second particle portion 24a includes synthetic resin beads or an inorganic compound filler, and imparts a three-dimensional feeling by touch to the second surface protection layer 24. For example, acrylic resin beads can be employed for the second particle portion 24a. Also, it is preferable to employ a transparent or translucent material for the second particle portion 24a to such an extent that the pattern of the printed pattern layer 22 can be seen through the first surface protection layer 23 and the second surface protection layer 24.

[0047] Since the second surface protection layer 24 is partially formed on the upper side UP of the first surface protection layer 23, an uneven shape is formed on the upper side UP surface of the first surface protection layer 23 depending on the coating film thickness of the second surface protection layer 24, and a three-dimensional feeling by touch can be imparted to the wallpaper 100. Also, since the second surface protection layer 24 includes the second particle portion 24a, the three-dimensional feeling by touch can be more emphasized depending on the particle size of the second particle portion 24a.

[0048] As a method for forming the second surface protection layer 24, known printing methods such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing can be adopted. When printing the second surface protection layer 24 mixed with the second particle portion 24a on the upper side UP of the first surface protection layer 23, it is preferable to adopt intaglio printing such as gravure printing. Further, the second surface protection layer 24 may be formed using a known coating device.

[0049] According to the wallpaper 100 of the present embodiment, it includes a paper base material 10 and a surface resin layer 20 provided on the upper side UP of the paper base material 10. Further, the surface resin layer 20 includes a first surface protection layer 23 containing spherical fillers 23a with an average particle size of 3.0 μm or more and 7.0 μm or less, and a second surface protection layer 24 provided on the upper side UP of the first surface protection layer 23, containing synthetic resin beads or inorganic compound fillers and having a different gloss from the first surface protection layer 23.

[0050] As a result, it is possible to provide a wallpaper 100 having a gloss-matte feeling and excellent scratch resistance.

[0051] As described above, one embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present invention are also included. Further, the constituent elements shown in the above-described one embodiment and the modification examples shown below can be appropriately combined.

[0052] (Modification Example 1) In the above embodiment, the uneven shape by embossing is formed on the surface 20s of the surface resin layer 20, but the mode of the surface resin layer is not limited to this. The surface resin layer may not be embossed.

[0053] The present invention will be described in detail with the following examples. The present invention is not limited to the following examples.

[0054] (Example 1) As the paper base material 10, ordinary paper with a coating amount of 65 g and a thickness of 110 μm was prepared. A paste obtained by adding 55 parts of a plasticizer and 150 parts of a filler to a vinyl chloride resin was applied to the upper side UP of the paper base material 10 by a coating method so that the coating amount was 200 g / m 2 to form a base resin layer 21.

[0055] Gravure ink using aqueous ink was printed on the upper side UP of the base resin layer 21 to form a printed pattern layer 22. As the first particle portion 23a, an ultraviolet curable resin containing an inorganic filler with an average particle size of 3.0 μm was applied to the upper side UP of the printed pattern layer 22 so that the dried coating amount was 3.0 g / m 2 to form a first surface protection layer 23.

[0056] An ultraviolet curable resin added with synthetic resin beads as the second particle portion 24a was applied to the upper side UP of the first surface protection layer 23 to form a second surface protection layer 24.

[0057] Thus, a surface resin layer 20 composed of a base resin layer 21, a printed pattern layer 22, a first surface protection layer 23, and a second surface protection layer 24 was formed on the upper side UP of the paper base material 10, and it was heated so that the surface temperature became 170°C.

[0058] Thereafter, embossing was performed on the surface 20s of the surface resin layer 20 so that the maximum height difference H in the vertical direction V became 50 μm, and an uneven shape (emboss) was formed on the surface 20s of the surface resin layer 20. Thereafter, cooling and drying were performed to obtain the wallpaper 100 of Example 1.

[0059] (Example 2) The wallpaper 100 of Example 2 was obtained in the same manner as in Example 1, except that embossing was performed on the surface 20s of the surface resin layer 20 so that the maximum height difference H became 100 μm.

[0060] (Comparative Example 1) The wallpaper of Comparative Example 1 was obtained in the same manner as in Example 1, except that the average particle size of the first particle portion was 1.0 μm.

[0061] (Comparative Example 2) A wallpaper of Comparative Example 2 was obtained in the same manner as in Example 1, except that the average particle diameter of the first particle portion was 8.0 μm.

[0062] (Comparative Example 3) A wallpaper of Comparative Example 3 was obtained in the same manner as in Example 1, except that the first surface protection layer does not contain the first particle portion.

[0063] (Comparative Example 4) A wallpaper of Comparative Example 4 was obtained in the same manner as in Example 1, except that the first surface protection layer does not contain the first particle portion and a thermosetting resin was used for the first surface protection layer.

[0064] (Comparative Example 5) A wallpaper of Comparative Example 5 was obtained in the same manner as in Example 1, except that the first surface protection layer does not contain the first particle portion and a mixed resin obtained by mixing a thermosetting resin and an ultraviolet curable resin was used for the first surface protection layer.

[0065] (Comparative Example 6) A wallpaper of Comparative Example 6 was obtained in the same manner as in Example 1, except that the first surface protection layer does not contain the first particle portion and the surface of the surface resin layer was not embossed.

[0066] (Experiment 1) A gloss / matte evaluation test was conducted on the wallpapers of Examples 1-2 and Comparative Examples 1-6. In the gloss / matte evaluation test, a sensory test was conducted by 10 testers on the designability based on the gloss / matte feeling (difference in gloss) of the first surface protection layer and the second surface protection layer of the wallpaper, and the appearance degree of the design was evaluated.

[0067] The evaluation criteria were in four levels, and a passing grade was set as an evaluation of ○ or above. ◎ (Excellent): Nine or more and ten or fewer people evaluated that the appearance of the design was good. 〇 (Good): Seven or more and eight or fewer people evaluated that the appearance of the design was good. △ (Fair): One or more and six or fewer people evaluated that the appearance of the design was good. × (Poor): Zero people evaluated that the appearance of the design was good.

[0068] (Experiment 2) A tactile evaluation test was conducted on the wallpapers of Examples 1-2 and Comparative Examples 1-6. In the tactile evaluation test, a sensory test was conducted by 10 testers on the tactile sensation (three-dimensional design feeling) on the surface of the surface resin layer of the wallpaper, and the degree of the tactile sensation was evaluated.

[0069] The evaluation criteria were divided into three levels, and a passing grade was set as an evaluation of ○ or above. ◎ (Excellent): Nine or more and ten or fewer people evaluated that the touch feeling was good. 〇 (Good): Seven or more and eight or fewer people evaluated that the touch feeling was good. × (Poor): Six or fewer people evaluated that the touch feeling was good.

[0070] (Experiment 3) A scratch resistance test was conducted on the wallpapers of Examples 1-2 and Comparative Examples 1-6. In the scratch resistance test, the surface of the surface resin layer was scratched with a load of 100 g using a Hoffman scratch hardness tester (SG-1610 manufactured by BYK-Gardner), and the scratched area was observed under oblique light to evaluate whether the surface of the surface resin layer peeled off and the change in the gloss of the surface of the surface resin layer.

[0071] The evaluation criteria were divided into four levels, and a passing grade was set as an evaluation of ◎ or above. ◎ (Excellent): There was no significant change in the surface state of the surface resin layer. 〇 (Good): There was a slight gloss change on the surface of the surface resin layer. △ (Fair): There was a gloss change on the surface of the surface resin layer. × (Poor): A part of the surface resin layer peeled off.

[0072] (Experimental Results) The results of Experiments 1-3 are shown in Table 1. Examples 1-2 showed good results in all experiments.

[0073] Comparative Example 1-2, in which the average particle size of the first particle portion was less than 3.0 μm or more than 7.0 μm, showed a slight change in gloss on the surface of the surface resin layer in Experiment 3, and was therefore unsatisfactory. Also, Comparative Example 3-6, in which the first surface protective layer did not contain the first particle portion, showed a change in gloss on the surface of the surface resin layer in Experiment 3, and was therefore unsatisfactory.

[0074] [Table 1] [Explanation of symbols]

[0075] 100 wallpapers 10 Paper base material 20 Surface resin layer 20s Surface of the surface resin layer 21 Base resin layer 22 Printed image layer 22a First pattern forming section 22b Second pattern forming section 23 First surface protective layer 23a First particle portion (spherical filler) 24 Second surface protection layer 24a Second particle part V vertical direction UP upper side LO Lower

Claims

1. A paper base material, A surface resin layer provided on the upper side of the paper base material, Comprising, The surface resin layer, A first surface protection layer containing spherical fillers with an average particle size of 3.0 μm or more and 7.0 μm or less, Provided on the upper side of the first surface protection layer, containing synthetic resin beads or inorganic compound fillers, and having a different gloss from the first surface protection layer, a second surface protection layer, Comprising, Wallpaper.

2. The surface resin layer has an uneven shape with a maximum height difference in the vertical direction of 100 μm or less on the surface, The wallpaper according to Claim 1.

3. The first surface protection layer and the second surface protection layer contain a thermosetting resin, an ultraviolet curable resin, or a mixture of a thermosetting resin and an ultraviolet curable resin, The wallpaper according to Claim 1.

4. The surface resin layer, A base resin layer provided on the upper side of the paper base material, A printed pattern layer provided on the upper side of the base resin layer, Further comprising, The second surface protection layer is partially provided on the upper side of the first surface protection layer and is provided at a position synchronized with the pattern of the printed pattern layer, The wallpaper according to Claim 1.

5. The base resin layer contains an aqueous emulsion resin or a vinyl chloride resin, The wallpaper according to Claim 4.

6. The base resin layer contains a foaming agent, The wallpaper according to Claim 4.

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