Wallpaper

Abstract

To provide a wallpaper having an embossed surface and an excellent gloss-mat feelings.SOLUTION: A wallpaper 100 includes: a paper base material 10; and a surface resin layer 20 provided on an upper side UP of the paper base material 10, having a convex-concave shape on a surface 20s, wherein: the surface resin layer 20 includes a first surface protective layer, and a second surface protective layer that has a gloss different from that of the first surface protective layer and is provided on the upper side UP of the first surface protective layer; and a maximum height difference in a vertical direction V of the concave-convex shape is 100 μm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to wallpaper. [Background technology]

[0002] Conventionally, wallpapers used for wall decoration of buildings have a glossy matte appearance created by multiple surface protective layers with different glossiness, and have a visual three-dimensional appearance. In addition, wallpapers have a three-dimensional appearance due to the texture formed on the surface by embossing or the like.

[0003] An example of wallpaper with a three-dimensional effect is the matte gloss decorative sheet described in Patent Document 1. The matte gloss decorative sheet described in Patent Document 1 has multiple surface protective layers formed on the same plane above a picture print layer. As these multiple surface protective layers have different glosses, the matte gloss decorative sheet described in Patent Document 1 has a visual three-dimensional effect. In addition, the upper surface of the surface protective layer is embossed to create an embossed (concave-convex pattern) that gives the sheet a three-dimensional feel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-122574 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in wallpaper that expresses a glossy and matte feel by using multiple surface protective layers with different glossiness, if the embossing depth provided on the surface of the surface protective layer is too deep, there is a risk that the glossy and matte feel will be reduced, the design will be inferior, and there is also a risk that the surface strength will be reduced.

[0006] In view of the above circumstances, an object of the present invention is to provide wallpaper having an embossed surface and an excellent glossy matte feel. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following means. The wallpaper of the present invention comprises a paper base material and a surface resin layer having an uneven surface and provided on the upper side of the paper base material, the surface resin layer comprising a first surface protective layer and a second surface protective layer having a different gloss from the first surface protective layer and provided on the upper side of the first surface protective layer, and the maximum height difference in the vertical direction of the uneven surface is 100 μm or less.

[0008] In the above wallpaper, the coating amount of the second surface protective layer is 0.5 g / m 2 More than 2.0g / m 2 It may be the following.

[0009] In the above wallpaper, the second surface protective layer may have a particle portion containing synthetic resin beads or an inorganic compound filler.

[0010] In the above wallpaper, the surface resin layer may further include 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, and the second surface protective layer may be provided in a position that is in harmony with the pattern of the printed pattern layer.

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

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

[0013] According to the wallpaper of the present invention, it is possible to provide wallpaper having an embossed surface and an excellent glossy matte feel. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a cross-sectional view showing a schematic view of a wallpaper according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic view of the surface of a surface resin layer of the wallpaper. [Diagram 3] FIG. 2 is a cross-sectional view showing a schematic configuration of the surface resin layer. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0016] FIG. 1 is a cross-sectional view that illustrates a 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 of the wallpaper 100 on which the paper base material 10 is provided is defined as the "lower side LO" in the vertical direction V, and the side opposite the lower side LO is defined as the "upper side UP" in the vertical direction V.

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

[0018] The basis weight of the paper base material 10 is 50 g / m 2 More than 100g / m 2 The thickness of the paper base material 10 is preferably 80 μm or more and 150 μm or less, which allows the wallpaper 100 to have sufficient rigidity and prevents the wallpaper 100 from curling.

[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 that illustrates a schematic view of a surface 20s (upper side UP) of the surface resin layer 20. As shown in FIG.

[0020] An uneven shape (embossment) is provided on the surface 20s of the surface resin layer 20. This uneven shape is formed, for example, by performing embossing processing in which an embossing roll is pressed against the surface 20s of the surface resin layer 20.

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

[0022] The maximum height difference H in the vertical direction V of the uneven shape on the surface 20s of the surface resin layer 20 is 100 μm or less. Here, the maximum height difference H indicates the distance in the vertical direction V between the convex part P1 located on the uppermost side UP and the concave part P2 located on the lowermost side LO in the uneven shape formed on the surface 20s of the surface resin layer 20, as shown in FIG.

[0023] The protruding portion P1 is, for example, a portion formed by the deepest part of an embossing plate (embossing roll) that is pressed against the surface 20s of the surface resin layer 20 to form an uneven shape. Specifically, as shown in Fig. 2, when the cross-sectional shape of the surface 20s of the surface resin layer 20 is a wave shape, the protruding portion P1 is the apex of the part (mountain portion) that protrudes most upward UP.

[0024] The recess P2 is, for example, a portion formed by the shallowest portion of an embossing plate that is pressed against the surface 20s of the surface resin layer 20 to form a concave and convex shape. Specifically, as shown in Fig. 2, when the cross-sectional shape of the surface 20s of the surface resin layer 20 is a wave shape, the recess P2 is the bottom point of the portion (valley portion) that is concave most toward the lower side LO.

[0025] By providing the surface 20s of the surface resin layer 20 with an uneven shape, the wallpaper 100 can have a three-dimensional feel when tactilely felt.

[0026] Furthermore, when the surface resin layer 20 is composed of multiple layers having different glosses and has a glossy matte feel, the maximum height difference H in the vertical direction V of the uneven shape can be set to 100 μm or less to prevent a decrease in the glossy matte feel.

[0027] Therefore, even if the wallpaper 100 has an uneven shape (embossed), the glossy matte feel is not lost and a sufficient visual three-dimensional feel can be achieved. The glossy matte feel of the surface resin layer 20 will be described in detail later.

[0028] Furthermore, by making the maximum height difference H of the uneven shape in the up-down direction V on the surface 20s of the surface resin layer 20 100 μm or less, the surface strength and wear resistance can be improved.

[0029] FIG. 3 is a cross-sectional view that illustrates a schematic configuration of the surface resin layer 20. As shown in FIG. The surface resin layer 20 includes a base resin layer 21, a printed design layer 22, a first surface protective layer 23, and a second surface protective layer 24.

[0030] 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 substrate 10 in the wallpaper 100. As the base resin layer 21, a water-based emulsion resin, a vinyl chloride resin, or the like can be used.

[0031] The coating amount of the base resin layer 21 is 80 g / m 2 More than 260g / m 2 It is preferable that the degree of polymerization of the vinyl chloride resin is 600 or more. When vinyl chloride resin is used as the base resin layer 21, the amount of the base resin layer 21 applied is limited by the degree of polymerization of the vinyl chloride resin. It is also preferable that the degree of polymerization of the vinyl chloride resin is 600 or more. By making the degree of polymerization of the vinyl chloride resin 600 or more, the wallpaper 100 can obtain sufficient strength.

[0032] 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 in wallpaper, such as thermally expandable microcapsules, can be used. For example, when thermally expandable microcapsules are mixed into the base resin layer 21 as the foaming agent, the thermally expandable capsules foam when heat is applied, and the volume of the base resin layer 21 expands. By foaming the base resin layer 21 with the foaming agent, the thickness of the wallpaper 100 increases, and therefore the wallpaper 100 can be given sufficient unevenness concealment properties.

[0033] Furthermore, a plasticizer, a filler, or the like can be appropriately mixed into the base resin layer 21 depending on the application. By mixing a plasticizer, a filler, or the like, the base resin layer 21 can be given properties such as flexibility or heat resistance.

[0034] The base resin layer 21 can be formed by any of the known coating methods, such as knife coating, nozzle coating, die coating, lip coating, comma coating, gravure coating, rotary screen coating, and reverse roll coating.

[0035] 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 by printing a pattern such as wood grain, stone grain, or sand grain on the upper side UP of the base resin layer 21.

[0036] 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 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 having different colors.

[0037] A known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing can be used to form the printed pattern layer 22. Also, known printing inks suitable for the printing method to be adopted can be used for the first pattern forming portion 22a and the second pattern forming portion 22b.

[0038] The first surface protective layer 23 is a layer provided on the upper side UP of the printed pattern layer 22. For example, a thermosetting resin having a urethane bond or an ionizing radiation curable resin such as an acrylic resin can be used as the first surface protective layer 23. It is preferable to use a transparent or semi-transparent material for the first surface protective layer 23 so that the pattern of the printed pattern layer 22 can be seen through.

[0039] A known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing can be used as a method for forming the first surface protective layer 23. The first surface protective layer 23 may be formed using a known coating device.

[0040] The second surface protective layer 24 is a layer provided on the upper side UP of the first surface protective layer 23. The second surface protective layer 24 may be provided partially on the upper side UP of the first surface protective layer 23. The second surface protective layer 24 may also be provided at a position that matches the pattern of the printed pattern layer 22. For example, the second surface protective layer 24 shown in Fig. 3 is provided in a position that matches the second pattern forming portion 22b of the printed pattern layer 22 and overlaps with the second pattern forming portion 22b in a plan view from the upper side UP.

[0041] The second surface protective layer 24 is desirably made of a transparent or semi-transparent material that allows the pattern of the printed pattern layer 22 to be seen through the first surface protective layer 23. The second surface protective layer 24 may be made of a thermosetting resin having a urethane bond, an ionizing radiation curable resin such as an acrylic resin, or the like.

[0042] The first surface protective layer 23 and the second surface protective layer 24 have different glosses. As a method for imparting a difference in gloss between the first surface protective layer 23 and the second surface protective layer 24, there is a method of adding a matting agent to the first surface protective layer 23 or the second surface protective layer 24.

[0043] For example, when a matting agent is added to the first surface protective layer 23 and no matting agent is added to the second surface protective layer 24, the first surface protective layer 23 has a lower gloss than the second surface protective layer 24. Different amounts of matting agent may be added to the first surface protective layer 23 and the second surface protective layer 24 to an extent that a difference in gloss can be imparted between the first surface protective layer 23 and the second surface protective layer 24.

[0044] Due to the difference in gloss between the first surface protective layer 23 and the second surface protective layer 24, the wallpaper 100 can express a glossy matte feel, and can create a visual three-dimensional feeling by utilizing an optical illusion of the human eye.

[0045] As shown in Fig. 3, the second surface protective layer 24 includes a particle portion 24a. The particle portion 24a includes synthetic resin beads or an inorganic compound filler, and provides a three-dimensional feel to the second surface protective layer 24. For example, acrylic resin beads can be used for the particle portion 24a. In addition, it is preferable to use a transparent or semi-transparent material for the particle portion 24a so that the pattern of the printed pattern layer 22 can be seen through the first surface protective layer 23 and the second surface protective layer 24.

[0046] When the second surface protective layer 24 is partially formed on the upper side UP of the first surface protective layer 23, an uneven shape is formed on the surface of the upper side UP of the first surface protective layer 23 due to the coating thickness of the second surface protective layer 24, so that in addition to the tactile sensation due to the uneven shape provided by embossing on the surface 20s of the surface resin layer 20, a stronger three-dimensional sensation can be imparted to the wallpaper 100. Furthermore, since the second surface protective layer 24 includes the particle portions 24a, the particle size of the particle portions 24a can further emphasize the three-dimensional sensation due to the tactile sensation.

[0047] The second surface protective layer 24 may be formed by a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing. When the second surface protective layer 24 containing the particle portion 24a is printed on the upper side UP of the first surface protective layer 23, it is preferable to use intaglio printing such as gravure printing. The second surface protective layer 24 may be formed by using a known coating device.

[0048] The coating amount of the second surface protective layer 24 is 0.5 g / m 2 More than 2.0g / m 2 The lower limit of the coating amount is preferably 0.5 g / m or less. 2 By setting the thickness of the second surface protective layer 24 at 2.0 g / m2, a sufficient three-dimensional feel can be imparted to the surface. 2 This reduces the difference in height in the vertical direction V between the portion on the upper side UP of the first surface protective layer 23 where the second surface protective layer 24 is formed and the portion where it is not formed, thereby improving the scratch resistance and abrasion resistance of the wallpaper 100.

[0049] Here, as described above, the wallpaper 100 has a glossy matte feel because the first surface protective layer 23 and the second surface protective layer 24 have different glosses. The wallpaper 100 has this glossy matte feel, which allows the user to feel a visual three-dimensional effect.

[0050] Moreover, the surface 20s of the surface resin layer 20 is provided with an uneven shape (embossment) having a maximum height difference H of 100 μm or less by embossing. The wallpaper 100 mainly provides a three-dimensional feel to the touch due to the presence of this embossment.

[0051] The wallpaper 100 has a visual three-dimensional effect due to the gloss matte finish, and a three-dimensional effect due to the tactile texture of the uneven shape provided on the surface 20s of the surface resin layer 20. The wallpaper 100 can provide an even more emphasized three-dimensional effect by combining the visual three-dimensional effect and the three-dimensional effect due to the tactile sensation.

[0052] For example, when the pattern of the printed pattern layer 22 is a wood grain pattern, by imparting visual and tactile three-dimensionality to the duct parts of the wood grain pattern, it is possible to provide wallpaper 100 with a wood grain pattern that more closely resembles the appearance of natural wood.

[0053] In the wallpaper 100, the maximum height difference H in the vertical direction V of the uneven shape provided on the surface 20s of the surface resin layer 20 is 100 μm or less, so that the deterioration of the gloss matte feeling described above is suppressed and a three-dimensional feeling can be felt by touch. In other words, by making the maximum height difference H of the uneven shape 100 μm or less, it is possible to provide wallpaper 100 having an uneven shape (embossment) on the surface 20s of the surface resin layer 20 and having an excellent gloss matte feeling. As a result, the wallpaper 100 can have a three-dimensional feeling by touch and a three-dimensional feeling visually.

[0054] The wallpaper 100 of this embodiment includes a paper base material 10 and a surface resin layer 20 provided on the upper side UP of the paper base material 10, and a surface 20s of the surface resin layer 20 is provided with an uneven shape with a maximum height difference H of 100 μm or less in the vertical direction V. The surface resin layer 20 also includes a first surface protective layer 23 and a second surface protective layer 24 provided on the upper side UP of the first surface protective layer 23, and the first surface protective layer 23 and the second surface protective layer 24 have different glosses.

[0055] As a result, the surface 20s of the surface resin layer 20 has an uneven shape (embossed), and the wallpaper 100 has an excellent glossy matte feel.

[0056] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like within the scope of the present invention are also included. In addition, the components shown in the above-mentioned embodiment and the modified examples shown below can be appropriately combined to form a configuration.

[0057] (Variation 1) In the above embodiment, the second surface protective layer 24 has the particle portion 24a, but the form of the second surface protective layer is not limited to this. The second surface protective layer may not have a particle portion. Even if the second surface protective layer does not have a particle portion, the wallpaper can have a three-dimensional feel by touch due to the uneven shape of the surface of the surface resin layer.

[0058] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.

[0059] Example 1 A plain paper with a coating weight of 65 g and a thickness of 110 μm was prepared as the paper substrate 10. A paste containing 55 parts of a plasticizer and 150 parts of a filler in a polyvinyl chloride resin was applied to the paper substrate with a coating weight of 200 g / m 2 The resin was applied to the upper side UP of the paper base material 10 by a coating method so as to form a base resin layer 21.

[0060] A gravure ink using a water-based ink was printed on the upper side UP of the base resin layer 21 to form a printed pattern layer 22. A matte (low gloss) resin was applied in an amount of 3 g / m 2 The upper side UP of the printed design layer 22 was printed by gravure printing so as to form a first surface protective layer 23.

[0061] The particle portion 24a is a gloss (high gloss) resin containing synthetic resin beads, and the coating amount is 2 g / m 2 The second surface protective layer 24 was formed by printing on the upper side UP of the first surface protective layer 23 by gravure printing. The second surface protective layer 24 was formed at a position aligned with the second pattern forming portion 22b of the printed pattern layer 22.

[0062] In this way, a surface resin layer 20 composed of a base resin layer 21, a printed pattern layer 22, a first surface protective layer 23 and a second surface protective layer 24 was formed on the upper side UP of the paper base material 10, and heated so that the surface temperature reached 170°C.

[0063] Thereafter, the surface 20s of the surface resin layer 20 was embossed so that the maximum height difference H in the vertical direction V was 100 μm or less, forming an uneven shape (embossment) on the surface 20s of the surface resin layer 20. Thereafter, cooling and drying were performed, and the wallpaper 100 of Example 1 was obtained.

[0064] Example 2 The wallpaper 100 of Example 2 was obtained in the same manner as in Example 1, except that the maximum height difference H in the vertical direction V of the uneven shape provided on the surface 20s of the surface resin layer 20 was set to 50 μm or less.

[0065] Comparative Example 1 Wallpaper of Comparative Example 1 was obtained in the same manner as in Example 1, except that the surface of the surface resin layer was not embossed and no irregularities were formed.

[0066] Comparative Example 2 Wallpaper of Comparative Example 2 was obtained in the same manner as in Example 1, except that the maximum difference in height in the vertical direction of the uneven shape provided on the surface of the surface resin layer was set to 200 μm or more.

[0067] (Experiment 1) A gloss matte evaluation test was conducted on the wallpapers of Example 1-2 and Comparative Example 1-2. In the gloss matte evaluation test, 10 testers performed a sensory test on the design based on the gloss matte feel (difference in gloss) of the first surface protective layer and the second surface protective layer of the wallpaper, and evaluated the degree of appearance of the design.

[0068] The evaluation criteria were on a four-point scale, with a rating of 〇 or above being considered a pass. ◎ (Excellent): Between 9 and 10 people rated the design as good in appearance. ◯ (Good): Between 7 and 8 people rated the appearance of the design as good. △(Fair): Between 1 and 6 people rated the appearance of the design as good. × (Poor): 0 people rated the appearance of the design as good.

[0069] (Experiment 2) A tactile evaluation test was carried out on the wallpapers of Example 1-2 and Comparative Example 1-2. In the tactile evaluation test, 10 testers carried out a sensory test on the tactile feel of the surface of the surface resin layer of the wallpaper, and evaluated the degree of the tactile feel.

[0070] The evaluation criteria were three-level, with a rating of 〇 or above being considered a pass. Excellent: Between 9 and 10 people rated the texture as good. ◯ (Good): 7 or more and 8 or less people rated the texture as good. × (Poor): Six or fewer people rated the feel as good.

[0071] (Experiment 3) The surface strength test was carried out on the wallpapers of Example 1-2 and Comparative Example 1-2. In the surface strength test, the damage state when the surface of the surface resin layer was scratched was visually confirmed by a test based on the "Surface Reinforced Wallpaper Performance Standards" standard established by the Wallpaper Industry Association, and it was evaluated whether or not the second surface protective layer fell off on the surface of the surface resin layer.

[0072] The evaluation criteria were two-level, with a rating of 〇 being a pass. ◯ (Good): The second surface protective layer did not fall off. × (Poor): The second surface protective layer was peeled off.

[0073] (Experiment 4) The wallpapers of Example 1-2 and Comparative Example 1-2 were subjected to abrasion resistance tests. In the abrasion resistance test, a test based on "JIS A 6921 abrasion color fading test" was conducted to visually check the surface condition of the surface resin layer after abrasion, and the surface of the surface resin layer was evaluated for whether the second surface protective layer fell off and for changes in gloss of the second surface protective layer.

[0074] The evaluation criteria were three-level, with a rating of 〇 or above being considered a pass. Excellent: There is no significant change in the surface condition of the second surface protective layer. ◯ (Good): The second surface protective layer changed in gloss but did not fall off. × (Poor): The second surface protective layer was peeled off.

[0075] (Experimental Results) The results of Experiments 1-4 are shown in Table 1. Example 1-2 showed good results in all experiments.

[0076] Comparative Example 1, which did not have an uneven shape on the surface of the surface resin layer, was slightly inferior to Examples 1-2 and failed in Experiment 2. Comparative Example 2, in which the uneven shape provided on the surface of the surface resin layer had a maximum height difference in the up-down direction of more than 100 μm, failed in Experiments 1, 3, and 4.

[0077] [Table 1] [Explanation of symbols]

[0078] 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 24 Second surface protection layer 24a Particle part V vertical direction UP upper side LO Lower

Claims

1. A paper substrate; A surface resin layer having an uneven surface and provided on the upper side of the paper base material; Equipped with The surface resin layer is A first surface protective layer; a second surface protective layer having a different gloss from that of the first surface protective layer and provided on the upper side of the first surface protective layer; Equipped with The maximum height difference in the vertical direction of the uneven shape is 100 μm or less. wallpaper.

2. The coating amount of the second surface protective layer is 0.5 g / m ２ 2.0g / m or more ２ Below is the 2. Wallpaper according to claim 1.

3. The second surface protective layer has a particle portion containing synthetic resin beads or an inorganic compound filler.

2. Wallpaper according to claim 1.

4. The surface resin layer is 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 equipped with The second surface protective layer is provided at a position in sync with the pattern of the printed pattern layer.

2. Wallpaper according to claim 1.

5. The base resin layer contains an aqueous emulsion resin or a vinyl chloride resin.

5. Wallpaper according to claim 4.

6. The base resin layer contains a foaming agent.

5. Wallpaper according to claim 4.

Images