Bathroom surface material and method for manufacturing the same

Abstract

This material facilitates inventory management of work-in-progress items during the manufacturing process for surface materials such as bathroom shower floors, while also improving appearance and ensuring resistance to detergents and abrasion. [Solution] A textured pattern 30 is formed on the surface 20a of the surface resin sheet 20 of the bathroom surface material 3. A decorative printing layer 22 is formed on the surface 20a by inkjet printing color ink. A clear printing layer 23 is formed on the decorative printing layer 22 by inkjet printing clear ink. The bathroom surface material 3 is placed over the main body 2a of the bathroom components such as the washing area floor 2.

Description

Technical Field

[0001] The present invention relates to a bathroom surface material to be covered on the body of a bathroom construction material such as a washroom floor, and a method for manufacturing the bathroom surface material. In particular, it relates to a bathroom surface material in which a decorative printing layer is formed on a resin sheet and a method for manufacturing the same.

Background Art

[0002] It is known to provide a surface material such as a resin sheet on the surface of a bathroom construction material such as a washroom floor (see Patent Documents 1, 2, etc.). For example, the washroom floor surface material of Patent Document 1 is composed of a single-layer resin sheet made of polyvinyl chloride and is covered on the surface of the washroom floor body. The washroom floor surface material of Patent Document 2 has a two-layer resin sheet made of polyvinyl chloride. The resin sheet on the front side is a transparent clear resin sheet, and a decorative printing layer by inkjet printing is formed on the opposing surface of either one of the resin sheets.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] This type of bathroom surface material is required to have detergent resistance and abrasion resistance. However, for a bathroom surface material made of a single-layer resin sheet, when a decorative layer is formed, its protection becomes a problem. On the other hand, bathroom surface materials consisting of multiple layers of resin sheets require work-in-progress resin sheets for each layer during the manufacturing process. This necessitates inventory management for each resin sheet, which increases manufacturing costs. In the shower floor surface material described in Patent Document 2, the clear resin sheet on the surface acts as a protective layer for the decorative printed layer. However, the color and pattern of the decorative printed layer appear recessed by the thickness of the clear resin sheet, which may give the impression of cheapness. In view of these circumstances, the present invention aims to facilitate inventory management of work-in-progress products during the manufacturing stage for surface materials such as bathroom flooring, while also improving their appearance and ensuring resistance to detergents and abrasion. [Means for solving the problem]

[0005] To solve the aforementioned problems, the present invention provides a bathroom surface material that is placed over the main body of a bathroom component, A surface resin sheet having an uneven pattern formed on its surface facing the opposite side of the main body, A decorative printing layer consisting of a color ink cured product formed on the surface, A clear printing layer consisting of a clear ink cured product formed on the decorative printing layer, It is characterized by having the following features.

[0006] With this bathroom surface material, the clear printed layer acts as a protective layer for the decorative printed layer, ensuring detergent resistance and abrasion resistance. Furthermore, since a clear resin sheet is not required on the surface, inventory management of work-in-progress during the manufacturing stage is simplified. In addition, because the clear printed layer can be made significantly thinner than a clear resin sheet, the colors and patterns of the decorative printed layer can be clearly displayed. Moreover, the raised and recessed patterns create a three-dimensional effect. Ultimately, this improves the appearance of the bathroom surface material.

[0007] The decorative printing layer and the clear printing layer are preferably formed by inkjet printing, and more preferably by ultraviolet-curable inkjet printing using ultraviolet-curable inkjet ink. Preferably, the color ink cured product and the clear ink cured product are ultraviolet-curable ink cured products. This improves the detergent resistance and abrasion resistance of the decorative printing layer and the clear printing layer, allowing the color and pattern of the decorative printing layer to be maintained for a long period of time.

[0008] Preferably, the decorative printing layer is provided on the surface via a primer layer. This improves the adhesion of the decorative printing layer to the surface resin sheet. The primer layer is preferably formed by spray painting or inkjet printing. It is preferable that the thickness of the primer layer be as large as possible.

[0009] Preferably, the decorative printing layer is provided on the primer layer via a white printing layer made of a cured white ink. This allows for good color development of the decorative printing layer. Furthermore, the adhesion of the decorative printing layer to the surface resin sheet can be further improved.

[0010] Preferably, the uneven pattern includes a main uneven pattern and a fine uneven pattern formed to overlap the main uneven pattern, with finer irregularities than those of the main uneven pattern. This makes it possible to further improve the appearance of the surface material for bathrooms. In addition, since the actual surface area of ​​the surface resin sheet is increased, the adhesion between the decorative printing layer and the clear printing layer and the surface resin sheet can be further improved.

[0011] The present invention is a method for manufacturing a bathroom surface material that is placed over the main body of a bathroom component, A step of forming an uneven pattern on the surface resin sheet of the bathroom surface material that faces away from the main body, A step of forming a decorative printing layer on the aforementioned surface by inkjet printing color ink, A step of forming a clear printing layer by inkjet printing clear ink onto the decorative printing layer, It is characterized by having the following features. According to the present invention, by forming the decorative printing layer and the clear printing layer by inkjet printing, it is possible to improve the appearance by clearly displaying the color and pattern of the decorative printing layer while ensuring detergent resistance and abrasion resistance. Furthermore, the color and pattern of the decorative printing layer can be easily changed by editing the decorative printing data of the inkjet device. There is no need to manufacture, purchase, or store large quantities of multiple resin sheets or materials with different colors and patterns as work-in-progress. Moreover, clear resin sheets are unnecessary, making it easier to manage work-in-progress inventory.

[0012] Preferably, the color ink and the clear ink are UV-curable inks, and UV light is irradiated onto the surface during inkjet printing. This allows for improved adhesion to the surface resin sheet by forming the decorative printing layer and the clear printing layer using UV-curing inkjet printing.

[0013] Preferably, the mold for forming the uneven pattern has a transfer surface for the main uneven pattern in the uneven pattern, and further, a fine uneven transfer pattern having finer irregularities than the irregularities of the main uneven pattern is formed on the transfer surface. This allows for the formation of a fine uneven pattern that overlaps with the main uneven pattern on the surface of the bathroom surface material, further improving the appearance of the bathroom surface material. In addition, since the actual surface area of ​​the surface resin sheet is increased, the adhesion between the decorative printing layer and the clear printing layer and the surface resin sheet can be further improved.

[0014] Preferably, the fine uneven transfer pattern is formed by blasting. More preferably, it is formed by sandblasting. The particle size of the abrasive used in sandblasting is preferably relatively coarse. This ensures that the adhesion between the decorative printing layer and the clear printing layer and the surface resin sheet is improved, thereby enhancing detergent resistance and abrasion resistance. [Effects of the Invention]

[0015] According to the present invention, it is possible to facilitate the inventory management of work-in-progress during the manufacturing stage in a bathroom surface material, ensure detergent resistance and abrasion resistance, and improve the appearance.

Brief Description of the Drawings

[0016] [Figure 1] FIG. 1 is a plan view of a bathroom including a washroom floor surface material (bathroom surface material) according to a first embodiment of the present invention. [Figure 2] FIG. 2(a) is a cross-sectional view taken along line IIa-IIa of FIG. 3. FIG. 2(b) is an enlarged cross-sectional view of a circular portion IIb in FIG. 2(a). [Figure 3] FIG. 3 is a plan view showing an enlarged part of the washroom floor surface material. [Figure 4] FIG. 4 is an explanatory side view of a manufacturing line of the washroom floor surface material. [Figure 5] FIG. 5 is a cross-sectional view of a washroom floor surface material (bathroom surface material) according to a second embodiment of the present invention. [Figure 6(a)] FIG. 6(a) is a photograph of a sample showing test results of detergent resistance and abrasion resistance by ultraviolet curable inkjet printing in Example 1. [Figure 6(b)] FIG. 6(b) is a photograph of a sample showing test results of detergent resistance and abrasion resistance by heat drying type inkjet printing in Example 1. [Figure 7(a)] FIG. 7(a) is a photograph of a sample showing the results of Example 2. [Figure 7(b)] FIG. 7(b) is a photograph of a sample showing the results of a comparative example for Example 2. [Figure 8(a)] FIG. 8(a) is a photograph of a sample showing test results of detergent resistance and abrasion resistance when the primer application amount is small in Example 3. [Figure 8(b)] FIG. 8(b) is a photograph of a sample showing test results of detergent resistance and abrasion resistance when the primer application amount is large in Example 3.

Embodiments for Carrying Out the Invention

[0017] Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment (Figures 1-4)> Figure 1 shows an example of bathroom 1. As shown in Figure 2(b), the shower floor 2 (bathroom component) of bathroom 1 comprises a main body 2a and a shower floor surface material 3 (bathroom surface material). The shower floor main body 2a is the base or main part of the shower floor 2 and is responsible for the strength and other required functions of the shower floor 2. The material of the shower floor main body 2a may be fiber-reinforced plastic (FRP) or other resins.

[0018] As shown in Figures 1 and 2(a), the washing area floor surface material 3 is laid on the surface (top surface) of the washing area body 2a. The washing area floor surface material 3 is formed in a rectangular shape that covers the entire surface of the washing area floor body 2a. Drainage openings 3b are formed in the washing area floor surface material 3 at locations corresponding to the drainage outlets 4.

[0019] As shown in Figure 2(a), the washing area floor surface material 3 comprises two (multiple) layers of base resin sheets 10 and a surface resin sheet 20. The base resin sheet 10 includes a back sheet 11 and an intermediate sheet 12. The back sheet 11 is made of, for example, foamed resin. The back sheet 11 is joined to the washing area floor body 2a via double-sided adhesive tape 14. Preferably, to ensure ease of removal during renovation, the strong adhesive layer 14a of the double-sided adhesive tape 14 is joined to the back sheet 11, and the weak adhesive layer 14b is joined to the washing area floor body 2a. The intermediate sheet 12 is laminated on the back sheet 11. The intermediate sheet 12 is made of, for example, a sheet of glass fiber nonwoven fabric or woven fabric impregnated with resin, or a glass mat.

[0020] A surface resin sheet 20 is layered on top of an intermediate sheet 12 of a base resin sheet 11. The surface resin sheet 20 is made of, for example, soft polyvinyl chloride resin. The thickness of the surface resin sheet 20 is approximately 0.1 mm to 0.6 mm.

[0021] As shown in Figure 2(b), a primer layer 21 (underlayment), a decorative printing layer 22, and a clear printing layer 23 are sequentially laminated on the surface 20a (the side facing away from the base resin sheet) of the surface resin sheet 20. The primer layer 21 is for improving the adhesion and bonding between the printing layers 22, 23 and the surface resin sheet 20, and may contain an adhesive polymer or a polymer formed by the polymerization of an ultraviolet-curable composition.

[0022] As shown in Figure 2(b), a decorative printing layer 22 is provided on the surface 20a via a primer layer 21. The decorative printing layer 22 is composed of a color ink cured product formed by inkjet printing. Preferably, as the color ink, an ultraviolet-curable color ink is used which contains a coloring agent (pigment) such as cyan, magenta, yellow, black, and white, as well as an ultraviolet-curable composition. The ultraviolet-curable composition may also act as a dispersant or solvent for the coloring agent. Preferably, the color ink cured product contains a polymer formed by the polymerization of the ultraviolet-curable composition and a coloring agent.

[0023] As shown in Figure 2(b), a clear printing layer 23 is formed on the decorative printing layer 22. The clear printing layer 23 is composed of a clear ink cured product formed by inkjet printing. Preferably, the clear ink used is an ultraviolet-curable clear ink that contains an ultraviolet-curable composition and does not contain a colorant. Preferably, the color ink cured product contains a transparent polymer formed by the polymerization of the ultraviolet-curable composition and does not contain a colorant.

[0024] The thicknesses of the primer layer 21, the decorative printing layer 22, and the clear printing layer 23 are sufficiently small compared to the thickness of the surface resin sheet 20, and are approximately 1 μm to 20 μm.

[0025] As shown in Figures 2(a) and 3, a textured pattern 30 is formed on the surface 20a of the surface resin sheet 20 (the thin film layers 21, 22, and 23 on the surface 20a). The textured pattern 30 includes a main textured pattern 31 and a fine textured pattern 32. Preferably, the main textured pattern 31 includes regularly arranged protrusions 31a (or recesses) of a certain shape across the entire surface 20a or a certain area. The size of each protrusion 31a is, for example, about 0.3 mm to 0.4 mm.

[0026] A fine uneven pattern 32 is formed so as to overlap the main uneven pattern 31. The fine uneven pattern 32 has finer irregularities than the main uneven pattern 31. The size of the irregularities in the fine uneven pattern 32 is, for example, about 0.04 mm to 0.10 mm. Preferably, the fine uneven pattern 32 includes spot-shaped protrusions 32a (or recesses) randomly arranged over the entire surface 20a or a certain area.

[0027] The washing area floor surface material 3 is manufactured, for example, as follows: As shown in Figure 4, the back sheet 11 and intermediate sheet 12 of the base resin sheet 11 and the surface resin sheet 20 are each introduced into the manufacturing line 40, heated to a high temperature by the sheet heating unit 41 to soften them, and then stacked and laminated together by the lamination unit 42. The sheet laminate 13, consisting of these laminated sheets 20, 12, and 11, is introduced into the embossing machine 50 (a device for forming uneven patterns) while still at a high temperature.

[0028] The embossing machine 50 has an embossing roll 51 (mold) and a receiving roll 52 that are close to each other and parallel to each other. A regular main uneven transfer pattern 53a, which is the source of the transfer of the main uneven pattern 31, is formed on the transfer mold surface 53, which is the outer surface of the embossing roll 51, by engraving. Furthermore, a fine uneven transfer pattern 53b is formed on the transfer mold surface 53 so as to overlap with the main uneven transfer pattern 53a. The fine uneven transfer pattern 53b is finer than the unevenness of the main uneven pattern 31 and consists of randomly arranged unevenness. The fine uneven transfer pattern 53b is preferably formed by blasting, and more preferably by sandblasting. The particle size of the abrasive for sandblasting is preferably relatively coarse, specifically 10 to 70 grit is preferred, and about 20 to 60 grit is more preferred.

[0029] As shown in Figure 4, the sheet laminate 13 is passed between the embossing roll 51 (mold) and the receiving roll 52 of the embossing machine 50. At this time, the surface resin sheet 20 is directed toward the embossing roll 51, and the back sheet 11 is directed toward the receiving roll 52. As a result, the surface 20a of the surface resin sheet 20 is pressed against the transfer mold surface 53 of the embossing roll 51, and a relief pattern 30 is formed on the surface 20a. Specifically, the main relief pattern 31 is formed by the main relief transfer pattern 53a. The fine relief pattern 32 is formed by the fine relief transfer pattern 52.

[0030] After passing through the embossing machine 50 and cooling, the sheet laminate 13 is cut into a shape that matches the washing area floor 2 using a cutting device 60 such as a press machine or a die-cutting machine. A double-sided adhesive tape 14 is attached to the back surface of the sheet laminate 13 after cutting. At this stage, a release layer (not shown) is attached to the weak adhesive layer 14b of the double-sided adhesive tape 14.

[0031] Next, a primer layer 21 is formed on the surface 20a of the sheet laminate 13 using a spray coating machine 70. Next, the sheet laminate 13 is set in the inkjet device 80. The inkjet device 80 includes a sheet support base 81, a nozzle head 82, a nozzle scanning unit 83, an ultraviolet irradiation unit 84, and a control unit 89. The sheet laminate 13 is set on the sheet support base 81. The memory 89m of the control unit 89 stores the color pattern data and printing program for the decorative printing layer 22.

[0032] Under the control of the control unit 89, the nozzle head 82 is scanned by the nozzle scanning unit 83, and color ink is sprayed from each color ink nozzle 82a of the nozzle head 82 onto the primer layer 21 on the surface 20a of the sheet laminate 13. Furthermore, clear ink is sprayed from the clear ink nozzle 82b of the nozzle head 82 so as to be layered on top of the color ink. In addition, ultraviolet light is irradiated onto the sheet laminate 13 from the ultraviolet irradiation unit 84, causing the color ink to harden on the surface 20a of the surface resin sheet 20, forming a decorative printing layer 22 made of cured color ink, and the clear ink to harden, forming a clear printing layer 23 made of cured clear ink. The primer layer 21 enhances the adhesion of the decorative printing layer 22 to the surface resin sheet 20. Furthermore, the fine uneven pattern 32 increases the actual surface area of ​​the surface 20a, thereby further improving ink adhesion. In this way, the washing area floor surface material 3 is completed.

[0033] With the washroom floor surface material 3, the clear printed layer 23 is the outermost layer, eliminating the need for a transparent clear resin sheet. Therefore, the number of sheet layers can be reduced. Furthermore, the color and pattern of the decorative printed layer 22 can be stored as data in memory 89m, and the data can be edited when correcting or changing the color and pattern. There is no need to manufacture, purchase, or store large quantities of multiple resin sheets or materials with different colors and patterns as work-in-progress. As a result, manufacturing costs can be reduced and inventory management can be simplified. Since the clear printing layer 22 can be made sufficiently thin compared to the clear resin sheet, the colors and patterns of the decorative printing layer 23 can be clearly displayed. In addition, the uneven pattern 30 creates a three-dimensional effect on the surface of the washing area floor surface material 3. As a result, the appearance of the washing area floor surface material 3 can be improved. The clear printing layer 23 acts as a protective layer for the decorative printing layer 22, ensuring detergent resistance and abrasion resistance. Furthermore, forming the decorative printing layer 22 and the clear printing layer 23 by UV-curing inkjet printing further enhances the detergent resistance and abrasion resistance of the decorative printing layer 22 and the clear printing layer 23. In addition, the random fine uneven pattern 32 of the uneven pattern 30 further improves the adhesion between the decorative printing layer 22 and the clear printing layer 23 and the surface resin sheet 20, thereby further enhancing detergent resistance and abrasion resistance. As a result, the color and pattern of the decorative printing layer 22 can be maintained over a long period of time.

[0034] Next, other embodiments of the present invention will be described. In the following embodiments, components that overlap with those described above are denoted by the same reference numerals in the drawings and their descriptions are omitted. <Second Embodiment (Figure 5)> As shown in Figure 5, in the washing area floor surface material 3B (bathroom surface material) according to the second embodiment, a white printing layer 24 is interposed between the primer layer 21 and the decorative printing layer 22 on the surface 20a of the surface resin sheet 20. The decorative printing layer 22 is provided via the white printing layer 24, which is made of white ink cured material. This allows for good color development of the decorative printing layer 22. It also improves the adhesion of the decorative printing layer 22 to the surface resin sheet 20.

[0035] The present invention is not limited to the embodiments described above, and various modifications can be made as long as they do not contradict its spirit. For example, the bathroom components according to the present invention are not limited to the washing area floor 2, but may also include the bathtub frame 5 (Figure 1), bathroom wall 6 (Figure 1), washbasin counter 7 (dotted line in Figure 1), bathroom ceiling (not shown), etc. The bathroom surface material may be a surface material provided on the surface of the bathtub frame 5, the wall surface of the bathroom wall 6 facing the inside of the bathroom, or the surface of the washbasin counter 7. The base resin sheet 10 is not limited to a two-layer structure consisting of a back sheet 11 and an intermediate sheet 12; it may also be composed of a single-layer resin sheet or a laminated resin sheet of three or more layers. The base resin sheet 10 may be omitted. The color ink and clear ink are not limited to UV-curing inks; they may also be heat-curing inks. The decorative printing layer 22 and the clear printing layer 23 may be formed not only by inkjet printing but also by spray coating. The primer layer 21 may be formed by inkjet printing. The primer layer 21 may be omitted. [Examples]

[0036] Examples will be described below. However, the present invention is not limited to the following examples. In Example 1, the detergent resistance and abrasion resistance of each type of inkjet printing were investigated. For the decorative printing layer and the clear printing layer, UV-curing ink and heat-drying ink were used. Using UV-curing color inks, product name LH-100 (cyan, magenta, yellow, black), manufactured by Mimaki Engineering Co., Ltd., and UV-curing clear ink, product name LH-100 (clear), also manufactured by Mimaki Engineering Co., Ltd., inkjet printing was performed on the surface of a washroom floor surface material sample using a UV-curing inkjet device. For the UV-curing inkjet device, we used the Mimaki Engineering Co., Ltd. large-format flatbed UV inkjet printer, model number JFX200-2513EX. For the heat-drying inkjet device, we used an HP Latex R1000 Plus printer manufactured by HP Japan. Furthermore, we used the CMYK inks installed in the same printer as the heat-drying color inks, and inkjet printing was performed on the surface of a washroom floor surface material sample using the heat-drying inkjet device. The surface resin sheet 20 of each washing area floor surface material sample was made of flexible polyvinyl chloride manufactured by Toli Corporation.

[0037] The surface of each printed surface resin sheet sample was moistened with detergent and rubbed with an aluminum-containing sponge, applying a load of 4 kg in a continuous back-and-forth motion. As a detergent, we used the yellow liquid version of Kao Corporation's product name, Bath Magiclin (registered trademark). The number of round trips was estimated at 5,475, assuming daily cleaning over 15 years. As a result, as shown in Figure 6, the sample using UV-curing ink (Figure 6(a)) showed less color fading and higher detergent resistance and abrasion resistance than the sample using heat-drying ink (Figure 6(b)). [Examples]

[0038] In Example 2, detergent resistance and abrasion resistance were investigated depending on the presence or absence and roughness of the fine uneven pattern. The outer surface (mold surface) of the embossing roll used to form the uneven pattern was sandblasted. The abrasive material used for sandblasting had a grit size of 20. The embossing roll was used to create a textured pattern on the surface of the washroom floor material sample. The surface resin sheet 20 of the washing area floor surface material sample was made of flexible polyvinyl chloride manufactured by Toli Corporation. A decorative printing layer 22 and a clear printing layer 23 were formed on the surface of the washing area floor surface material sample by ultraviolet-curing inkjet printing. For the decorative printing layer 22, we used Mimaki Engineering's UV-curing ink, model number LH-100 (cyan, magenta, yellow, black). For the clear printing layer 23, we used Mimaki Engineering Co., Ltd.'s UV-curing ink, model number LH-100 (clear). For the UV-curing inkjet device, we used the Mimaki Engineering Co., Ltd. large-format flatbed UV inkjet printer, model number JFX200-2513EX.

[0039] The surface of the printed surface resin sheet sample was moistened with detergent and rubbed with a deck brush, applying a load of 5 kg in a continuous back-and-forth motion. As a detergent, we used the yellow liquid version of Kao Corporation's product name, Bath Magiclin (registered trademark).

[0040] At the point where the number of round trips reached 782, equivalent to cleaning once a week for 15 years, no significant changes were observed on the surface of the surface resin sheet sample. As shown in Figure 7(a), surface degradation of the surface resin sheet sample was observed at 5475 cycles, which corresponds to daily cleaning for 15 years, but the degree was small. Therefore, it was confirmed that forming an uneven pattern by blasting with a coarse blasting treatment of about 20 grit improves detergent resistance and abrasion resistance. As a comparative example, a washing area floor surface material sample without blast treatment and therefore without a textured pattern was subjected to the same abrasion test as in Example 2, after forming the same printed layers 22 and 23 as in Example 2. As shown in Figure 7(b), surface deterioration was observed after 5475 back-and-forth cycles. [Examples]

[0041] In Example 3, the detergent resistance and abrasion resistance were investigated based on the amount of primer applied. The surface resin sheet 20 of the washing area floor surface material sample was made of flexible polyvinyl chloride manufactured by Toli Corporation. The amount of primer applied to the sample is 3.5 cc / m². 2 And, 20.0 cc / m 2 There were two possibilities. As a primer, we used Mimaki Engineering Co., Ltd.'s UV-curing ink, model number PR-200. A decorative printing layer 22 and a clear printing layer 23 were formed on the surface of the sample after primer application by ultraviolet-curing inkjet printing. For the decorative printing layer 22, we used Mimaki Engineering's UV-curing ink, model number LH-100 (cyan, magenta, yellow, black). For the clear printing layer 23, we used Mimaki Engineering Co., Ltd.'s UV-curing ink, model number LH-100. For the UV-curing inkjet device, we used the Mimaki Engineering Co., Ltd. large-format flatbed UV inkjet printer, model number JFX200-2513EX.

[0042] The surface of the printed surface resin sheet sample was moistened with detergent and rubbed with an aluminum mesh sponge (manufactured by Ohe Co., Ltd.) in a continuous back-and-forth motion while applying a load of 4 kg. As a detergent, I used Bath Magiclin, manufactured by Kao Corporation (the liquid is yellow).

[0043] Figure 8(a) shows a primer application rate of 3.5 cc / m². 2 This is a photograph of the sample at the point when it had completed 521 round trips. Figure 8(b) shows a primer application rate of 20.0 cc / m². 2 This photo shows the sample at the end of a 10-year period of daily cleaning, assuming 3640 round trips. Primer application rate: 20.0 cc / m² 2 The sample (Figure 8(b)) has a primer application rate of 3.5 cc / m². 2 The color and pattern were maintained for a longer period than in the previous sample (Figure 8(a)). [Industrial applicability]

[0044] The present invention is applicable as a surface material for, for example, the floor of a bathroom shower area. [Explanation of symbols]

[0045] 1 bathroom 2. Washing area floor (bathroom component) 2a Washing area floor unit (main unit) 3,3B Washing area floor surface material (bathroom surface material) 5. Bathtub frame (bathroom component) 6 Bathroom wall (bathroom construction materials) 7. Washbasin stand counter (bathroom component) 10. Base layer resin sheet 11 Back sheet 12 Intermediate Sheet 13-sheet laminate 14 Double-sided adhesive tape 20 Surface resin sheet 20a Surface (the side facing away from the base resin sheet) 21. Primer layer (undercoat) 22 Decorative printing layer 23 Clear Printing Layers 24 White printing layer 30 uneven patterns 31 Main uneven pattern 32 Fine uneven pattern 40 production lines 50 Embossing machine (device for forming raised and recessed patterns) 51 Embossing roll (mold) 53 Transfer type surface 53a Main relief transfer pattern 53b Fine relief transfer pattern 60 cutting machine 70 Spray coating machine 80 Inkjet devices 82 Nozzle Heads 82a Color Ink Nozzle 82b Clear Ink Nozzle 83 Nozzle scanning unit 84 UV irradiation area 89 Control Unit 89m memory

Claims

1. A surface material for bathrooms that is placed over the main body of a bathroom component, A surface resin sheet having an uneven pattern formed on its surface facing the opposite side of the main body, A decorative printing layer consisting of a color ink cured product formed on the surface, A clear printing layer consisting of a clear ink cured product formed on the decorative printing layer, A surface material for bathrooms characterized by having the following features.

2. The bathroom surface material according to claim 1, wherein the color ink cured product and the clear ink cured product are ultraviolet-curable ink cured products.

3. The bathroom surface material according to claim 1, wherein the decorative printing layer is provided on the surface via a primer layer.

4. The bathroom surface material according to claim 3, wherein the decorative printing layer is provided on the primer layer via a white printing layer made of a white ink cured product.

5. The bathroom surface material according to any one of claims 1 to 4, wherein the uneven pattern includes a main uneven pattern and a fine uneven pattern formed to overlap the main uneven pattern, with finer unevenness than the unevenness of the main uneven pattern.

6. A method for manufacturing a bathroom surface material that is placed over the main body of a bathroom component, A step of forming an uneven pattern on the surface resin sheet of the bathroom surface material that faces away from the main body, A step of forming a decorative printing layer on the aforementioned surface by inkjet printing color ink, A step of forming a clear printing layer by inkjet printing clear ink onto the decorative printing layer, A method for manufacturing a bathroom surface material, characterized by having the following features.

7. The bathroom surface material according to claim 6, wherein the color ink and the clear ink are ultraviolet-curable inks, and ultraviolet light is irradiated onto the surface during inkjet printing.

8. The method for manufacturing a bathroom surface material according to claim 6, wherein the mold for forming the uneven pattern has a transfer surface for the main uneven pattern in the uneven pattern, and further, a fine uneven transfer pattern having finer irregularities than the irregularities of the main uneven pattern is formed on the transfer surface.

9. The method for manufacturing a bathroom surface material according to claim 8, wherein the fine uneven transfer pattern is formed by blasting.

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