JP2017159583A - Moisture-proof decorative plate and building material, decorative plate, and decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture-proof decorative plate and building material, a decorative plate, and a decorative sheet which have easy wiping-off performance in cleaning, makes unevenness of wiping less noticeable, and has excellent cleanability.SOLUTION: There are included: a substrate sheet 1 made of a resin; a pattern layer 2 that is disposed on a surface 1a of the substrate sheet 1; a transparent adhesive layer 3 that is disposed on the pattern layer 2; a transparent thermoplastic resin layer 4 that is disposed on the transparent adhesive layer 3; and a surface protective layer 7 that is disposed on the transparent thermoplastic resin layer 4. A second surface protective layer 6 located on at least an outermost surface of the surface protective layer 7 has a 60-degree specular gloss of 20 or more and 35 or less according to JIS Z 8741.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a moisture-proof decorative board and building materials, a decorative board, and a decorative sheet.

Decorative sheets have been developed and developed in the process of residential construction developing as an industry. In particular, it can be said that prefabricated architecture has played a leading role in apartments, condominiums, and individual houses that are collective housing.
Since ancient times, houses have been made of materials based on local characteristics, such as wood and stone, and people have lived in styles rooted in their own culture, but with the development of the housing industry, the transition from natural materials to artificial materials has progressed. Has been done. In recent years, the heavy use of high-grade wood and stone materials can lead to deforestation and environmental problems, which is another factor that increases the demand for decorative sheets.

For example, in recent years, a so-called sheet flooring material in which a decorative sheet is bonded to the surface of a wood substrate such as plywood, MDF (medium fiber plate) or particle board has been widely used as a flooring material (Patent Document 1). reference).
In addition, after the interior decoration work of apartments, condominiums, and individual houses is completed, there is a room cleaning by a management company and a beauty contractor. Wipe and clean the adhesive scraps such as gypsum board and putty, dust, etc. scattered on the floor with water or detergent.

Japanese Patent No. 5045180

When wiping and cleaning the sheet flooring material, there is a problem that the dry wiping property after wiping with water is heavy, or unevenness is likely to occur during wiping, which requires time and effort for cleaning.
Therefore, the present invention has been made in view of such a situation, and has a light-wiping property during cleaning, a difficulty in seeing uneven wiping, and an excellent cleaning property. The purpose is to provide a board and a decorative sheet.

  In order to solve the above problems, a moisture-proof decorative board according to an aspect of the present invention includes a wooden base material, a decorative sheet provided on one surface side of the wooden base material, and the other surface of the wooden base material. A moisture-proof sheet provided on the side, the decorative sheet is a resin base sheet, and a pattern layer provided on the surface of the base sheet opposite to the wood base, A transparent adhesive layer provided on the pattern layer, a transparent thermoplastic resin layer provided on the transparent adhesive layer, and a surface protective layer provided on the transparent thermoplastic resin layer, The outermost layer located at least on the outermost surface of the surface protective layer has a 60-degree specular gloss value of 20 or more and 35 or less in accordance with JIS Z 8741.

  According to one aspect of the present invention, there are provided a moisture-proof decorative board, a building material, a decorative board, and a decorative sheet that have low wiping property during cleaning, difficulty in seeing uneven wiping, and excellent cleaning properties. Can do.

It is sectional drawing which shows the structural example of the decorative sheet 10 which concerns on embodiment of this invention. It is sectional drawing which shows the structural example of the moisture-proof decorative board 20 which concerns on embodiment of this invention. It is sectional drawing which shows the structural example of the building materials 30 and 40 which concern on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings described below, parts corresponding to each other are denoted by the same reference numerals, and repeated description of the same reference numerals will be omitted as appropriate. Further, the embodiment of the present invention exemplifies a configuration for embodying the technical idea of the present invention, and specifies the material, shape, structure, arrangement, dimensions, etc. of each part as follows. Not. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.

<Coating sheet>
FIG. 1 is a cross-sectional view illustrating a configuration example of a decorative sheet 10 according to an embodiment of the present invention.
As shown in FIG. 1, the decorative sheet 10 includes a resin base sheet 1, a design pattern layer 2 provided on one surface (hereinafter referred to as a surface) 1 a of the base sheet 1, and a design pattern layer. 2, a transparent adhesive layer 3 provided on the transparent adhesive layer 3, a transparent thermoplastic resin layer 4 provided on the transparent adhesive layer 3, and a surface protective layer 7 provided on the transparent thermoplastic resin layer 4. That is, in the decorative sheet 10 shown in FIG. 1, the pattern 1 is provided on the front surface 1 a of both the front and back surfaces of the resin base sheet 1, and the transparent adhesive layer 3 and the transparent thermoplastic resin are provided thereon. Layer 4 is laminated, and surface protective layer 7 is further laminated.
In addition, although the wording regarding the design pattern layer 2 “provided on the surface 1a of the base sheet 1” described above means that the design pattern layer 2 is provided on the base sheet 1, A case where another layer (for example, a ground layer) further exists between the material sheet 1 and the pattern layer 2 is also included in this expression. The same meaning is used when the word “above” is used to express the relationship between other layers.

Moreover, the surface protective layer 7 shown in FIG. 1 is an example in the case of being composed of two layers, a first surface protective layer 5 and a second surface protective layer 6. The second surface protective layer 6 is an outermost layer located at least on the outermost surface of the surface protective layer 7 and has a 60-degree specular gloss value of 20 or more and 35 or less in accordance with JIS Z 8741. The second surface protective layer 6 is mainly composed of a mixture of an ionizing radiation curable resin (for example, an ultraviolet curable resin) and a thermosetting resin, and contains a matting agent, and the content of the matting agent is It is less than 10% by mass. Here, the ionizing radiation curable resin is a synthetic resin that chemically changes from a liquid to a solid in response to the energy of ionizing radiation (for example, ultraviolet rays, α rays, β rays, or γ rays). .
As shown in FIG. 1, the decorative sheet 10 includes a back surface resin coat layer 8 provided on a surface (hereinafter referred to as a back surface) 1 b opposite to the pattern layer 2 of the base sheet 1. This back surface resin coat layer 8 is a silica-containing resin layer containing silica powder.

Hereinafter, each configuration of the decorative sheet 10 will be described more specifically.
(1) Base sheet The base sheet 1 made of resin is made of, for example, a colored thermoplastic resin. As the thermoplastic resin, for example, vinyl chloride resin, acrylic resin, polyolefin-based polypropylene resin or polyethylene resin can be used. Of these, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and cost. In addition, the grade and composition of the resin can be selected in consideration of ease of sheeting, printability, and suitability for bending.
When the base material sheet 1 is colored, the base material to which the decorative sheet is bonded is concealed, and the hue can be appropriately selected as the background color of the pattern pattern layer 2. For example, when a thermoplastic resin is sheeted, it can be colored by mixing and kneading a colorant such as a pigment. Alternatively, a colored layer can be provided under the pattern layer 2 by using a coating or printing technique as a solid ink layer before the pattern layer 2 is provided.

(2) Pattern pattern layer The pattern pattern layer 2 can be provided using a known printing technique. When the base sheet 1 can be prepared in a wound state, printing for forming the pattern layer 2 can be performed with a roll-to-roll printing apparatus. The printing method is not particularly limited, but for example, a gravure printing method can be used in consideration of productivity and picture quality.
Any design pattern may be used in consideration of the design as a flooring material, and various wood grain patterns are often used for wood-based patterns. It can also be. For example, if it is an image of a stone floor such as marble, it may be used as a pattern such as a marble stone. In addition to the pattern made of natural materials, an artificial pattern such as an artificial pattern or a geometric pattern using these as a motif can also be used.

The printing ink for forming the pattern layer 2 is not particularly limited, but an ink corresponding to the printing method can be appropriately selected and used. In particular, it is preferable to select in consideration of adhesion to the resin base material sheet 1, printability, and weather resistance as a flooring material.
If necessary, on the pattern layer 2 for the purpose of improving the adhesion between the pattern layer 2 and the transparent adhesive layer 3 and improving the adhesion between the transparent layer 3 and the transparent thermoplastic resin layer 4. An adhesive layer (not shown) may be provided. The resin used for the adhesive layer (not shown) is not particularly limited. For example, a two-component curable urethane resin can be used, and for example, it can be provided using a coating apparatus, a gravure printing apparatus, or the like.

(3) Transparent Adhesive Layer The transparent adhesive layer 3 is provided for the purpose of strengthening the adhesion between the base sheet 1 and the pattern layer 2 and the transparent thermoplastic resin layer 4. When this adhesion is strong, it is possible to give the decorative sheet 10 bending workability that follows a curved surface or a right-angled surface.

(4) Transparent thermoplastic resin layer The transparent thermoplastic resin layer 4 can be made of, for example, vinyl chloride resin, acrylic resin, polyolefin-based polypropylene resin or polyethylene resin. Of these, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and cost.
In addition, the grade and composition of the resin can be selected in consideration of ease of sheeting, printability, and suitability for bending. In particular, in bending workability, it is important to select in consideration that whitening and cracking of the bent portion do not occur.
The transparent adhesive layer 3 and the transparent thermoplastic resin layer 4 can be formed by, for example, co-extrusion and extruding both at the same time.
The transparent thermoplastic resin layer 4 has an effect that the decorative sheet has a thickness and depth that are designed to increase, and can improve the weather resistance and wear resistance of the decorative sheet.

(5) Surface protective layer A surface protective layer 7 is provided on the transparent thermoplastic resin layer 4. The surface protective layer 7 may be a single layer, or a plurality of layers may be stacked to form the surface protective layer 7. In the decorative sheet 10 of the present embodiment, as shown in FIG. 1, two layers of a first surface protective layer 5 and a second surface protective layer 6 are provided as the surface protective layer 7.
The surface protective layer 7 has an important role that determines the superiority or inferiority of bending workability, scratch resistance, and cleanability. In addition, it is important to select in consideration of cleanability. As a result of intensive studies on this point, we have found the following knowledge. That is, the main component of the second surface protective layer 6 corresponding to the outermost layer of the surface protective layer 7 is a mixture of an ionizing radiation curable resin and a thermosetting resin, so that scratch resistance when used on the floor can be obtained. At the same time, it was found that whitening and cracking of the surface protective layer are less likely to occur during bending.

  The second surface protective layer 6 corresponding to at least the outermost layer of the surface protective layer 7 is made of a mixture of an ionizing radiation curable resin and a thermosetting resin. You may provide another additive suitably to the mixture. The mixing ratio of the ionizing radiation curable resin and the thermosetting resin is set to be in the range of 5: 5 to 9: 1 in terms of mass ratio. That is, in the mixture, the ionizing radiation curable resin is 42.5 to 90% by mass, and the thermosetting resin is 8.5 to 50% by mass. The main component refers to, for example, 85% or more of the total mass of the mixture of ionizing radiation curable resin and thermosetting resin.

As described above, the main component of the second surface protective layer 6 corresponding to the outermost layer of the surface protective layer 7 is a mixture of an ionizing radiation curable resin and a thermosetting resin, so that it is scratch resistant when used on a floor. In addition to satisfying the properties, whitening and cracking of the surface protective layer are less likely to occur during bending.
In addition, silica or other matting agent is added to the second surface protective layer 6, and the matting agent to be added and the amount thereof are adjusted to adjust the second surface protective layer 6 according to JIS Z 8741 to 60 degrees. The specular gloss value was adjusted to be 20 or more and 35 or less. The gloss value adjustment by adjusting the content of the matting agent is generally known. However, in the present invention, the unevenness after wiping becomes noticeable by utilizing the “property of adsorbing substances” of these matting agents. It came to realize the effect.

Thus, by setting the 60-degree specular gloss value of the second surface protective layer 6 in accordance with JIS Z 8741 to 20 or more and 35 or less, unevenness after wiping during cleaning becomes conspicuous as described later.
In order to provide the surface protective layer 7 composed of the first surface protective layer 5 and the second surface protective layer 6, each layer is applied and cured using a known coating apparatus, thermal drying apparatus and ultraviolet irradiation apparatus. It can be performed.
About the 1st surface protective layer 5, you may use resin of the composition similar to the 2nd surface protective layer 6 of outermost layer, and you may use what changed the kind, composition, and ratio of resin separately.

(6) Back surface resin coat layer Although it is as above regarding the pattern pattern layer 2 side of the decorative sheet 10, the decorative sheet 10 is bonded to a wooden substrate (for example, a wooden substrate 12 described later) as a decorative sheet. When used or further bonded to another member and processed, a back surface resin coat layer 8 which is a resin layer containing silica powder is provided on the back surface 1b of the resin base material sheet 1, and a wood base material or the like. The adhesive strength may be improved. As an adhesive used for this bonding, for example, an ethylene-vinyl acetate copolymer emulsion-type adhesive can be used.

<Dampproof decorative board>
Next, the moisture-proof decorative board according to the embodiment of the present invention will be described.
FIG. 2 is a cross-sectional view illustrating a configuration example of the moisture-proof decorative board 20 according to the embodiment of the present invention.
As shown in FIG. 2, the moisture-proof decorative board 20 includes the above-described decorative sheet 10, the wooden substrate 12, and the moisture-proof sheet 14. For example, the decorative sheet 10 is provided on the one surface 12 a side of the wooden substrate 12, and the moisture-proof sheet 14 is provided on the other surface 12 b side of the wooden substrate 12. When the one surface 12a of the wooden substrate 12 is the front surface, the other surface 12b of the wooden substrate 12 is the back surface.

  A first adhesive layer 11 is provided between the wooden substrate 12 and the decorative sheet 10, and the wooden substrate 12 and the decorative sheet 10 are bonded to each other by the first adhesive layer 11. In addition, a second adhesive layer 13 is provided between the wooden substrate 12 and the moisture-proof sheet 14, and the wooden substrate 12 and the moisture-proof sheet 14 are bonded to each other by the second adhesive layer 13. A surface wettability modified portion in which the surface wettability is modified may be provided on the surface of the moisture-proof sheet 14 on the wooden substrate side. The surface wettability modified portion is formed by physical surface modification processing such as reactive ion etching (RIE) processing, for example. The second adhesive layer 13 includes an ethylene / vinyl acetate copolymer resin having a urethane bond.

Next, the wooden substrate 12, the moisture-proof sheet 14, the first adhesive layer 11, and the second adhesive layer 13 will be described more specifically.
(1) Wood base material The wood base material 12 is a plywood, a particle board, a medium density fiber board (MDF), or a hard board, for example. The thickness of the wooden substrate 12 is, for example, 1 mm or more and 50 mm or less.

(2) Moisture-proof sheet The moisture-proof sheet 14 is, for example, a base layer made of polyethylene terephthalate, a vapor deposition layer made of an inorganic oxide provided on one side of the base material layer, and a main component provided on the vapor deposition layer. Has a resin layer which is polyvinyl alcohol, and an adhesion primer layer provided on the resin layer. The other surface of the base material layer (that is, the surface opposite to the one surface) is a surface to be bonded to the wooden base material, and the surface wettability modifying portion may be provided on this surface.
Moreover, the moisture-proof sheet 14 may have transparency that allows the other surface side to be seen through from the one surface side. The moisture-proof sheet 14 may be colorless and transparent, or may be colored and transparent. Transparent refers to the degree of transparency that allows the back to be seen from the front.
Further, the water vapor permeability of the entire moisture-proof sheet 14 may be 1.0 g / m ² · day or less. The oxygen permeability of the entire moisture-proof sheet 14 may be 1.0 g / m ² · day or less. The moisture-proof sheet 14 may be a thermoplastic resin-based moisture-proof sheet.

(3) First and second adhesive layers The first adhesive layer 11 includes any type of adhesive such as a thermoplastic resin, a thermosetting resin, and a rubber (elastomer). These can be used by appropriately selecting known products or commercially available products.
Similarly to the first adhesive layer 11, the second adhesive layer 13 includes any type of adhesive such as a thermoplastic resin system, a thermosetting resin system, and a rubber (elastomer) system. The second adhesive layer 13 may include an ethylene / vinyl acetate copolymer resin (EVA) having a urethane bond. That is, the second adhesive layer 13 may be an EVA adhesive layer having a urethane bond.

<Building materials>
Next, the building material which concerns on embodiment of this invention is demonstrated.
FIGS. 3A and 3B are cross-sectional views showing a configuration example of the building materials 30 and 40 according to the embodiment of the present invention. As shown in FIG. 3A, the building material 30 includes the moisture-proof decorative board 20 and the core material 21 described above. In the building material 30, the moisture-proof sheet 14 side of the moisture-proof decorative board 20 is attached to one surface (for example, surface) 21 a side of the core material 21. The core material 21 is, for example, a wooden base material. This building material 30 can be used for flooring, for example.
As shown in FIG. 3B, the building material 40 also includes the moisture-proof decorative board 20 and the core material 21 described above. In the building material 40, the moisture-proof sheet 14 side of the moisture-proof decorative board 20 is attached to one side (for example, the front surface) 21a side and the other surface (for example, the back surface) 21b side of the core material 21, respectively. This building material 40 can be used for, for example, an indoor door, a kitchen door, a storage door, or a basket.

<Effect of embodiment>
The decorative sheet 10 according to the embodiment of the present invention has excellent cleaning properties, for example, scratch resistance and bending workability as a flooring material. For example, the decorative sheet 10 is easy to wipe off gypsum board, adhesive, putty and other debris accumulated during indoor construction, and has excellent cleaning properties as a flooring material. For this reason, this decorative sheet 10 and the moisture-proof decorative board 20 provided with the decorative sheet 10 are particularly suitable as a decorative sheet for flooring and a moisture-proof decorative board, respectively.
In addition, the decorative sheet 10 and the moisture-proof decorative board 20 are not limited to application to a flooring material, but can also be applied to a building material used around a floor surface such as a step board of a staircase. In addition, as described with reference to FIG. 3B, the decorative sheet 10 and the moisture-proof decorative board 20 are not limited to application to flooring materials and building materials used around the floor material, for example, indoor doors, kitchens, and the like. The present invention can also be applied to various building materials such as doors, storage doors, or eaves.

<Other configuration examples>
In the above embodiment, the case where the moisture-proof decorative board 20 is configured from the decorative sheet 10 shown in FIG. 1 has been described. However, in the present embodiment, the decorative sheet 10 may simply constitute a decorative board. For example, it is good also as a decorative board except the moisture-proof sheet | seat 14 from the moisture-proof decorative board 20 shown in FIG. Moreover, you may comprise a building material from this decorative board. Even if it is such a structure, the effect of said embodiment can be acquired.

EXAMPLES Hereinafter, the present invention will be described more specifically and in detail by examples, but the present invention is not limited only to these examples.
<Example 1>
A decorative sheet similar to that shown in FIG. 1 was prepared by the following material configuration and procedure.
(1) A colored polyethylene film (FZ manufactured by Riken Technos) was used as the base sheet.
(2) A wood grain pattern was printed with a gravure printing machine using gravure ink (Lamistor (registered trademark) manufactured by Toyo Ink Co., Ltd.) as a picture pattern layer.

(3) As the back surface resin coat layer, a two-component urethane primer resin containing silica powder was formed by gravure printing so that the thickness after drying was 1 μm.
(4) As an adhesive layer (not shown in FIG. 1), a two-component urethane resin adhesive having a polyester polyol as a main component and isophorone diisocyanate as a curing agent is applied onto the pattern layer, and the coating amount after drying is 2 g / m. ^The coating was performed to be ² .
(5) Maleic acid-modified polypropylene resin was used as the transparent adhesive layer (thickness 10 μm), and homopolypropylene (manufactured by Prime Polymer Co., Ltd.) was used as the transparent thermoplastic resin layer (thickness 80 μm).
At this time, the transparent adhesive layer and the transparent thermoplastic resin layer were laminated by extruding both using an extruder so that the transparent adhesive layer was on the pattern layer side.

(6) As a first surface protective layer, a coating liquid (made by DIC Graphics Co., Ltd.) mainly composed of a thermosetting acrylic urethane resin internally added with a matting agent made of silica has a thickness after drying of 9 μm. Coated so that.
Furthermore, as the second surface protective layer, a coating liquid mainly composed of an ultraviolet curable urethane acrylate resin (manufactured by DIC Graphics) and a coating liquid mainly composed of a thermosetting acrylic urethane resin (manufactured by DIC Graphics). Was prepared so as to have a mixing ratio of 7: 3, and coated so that the thickness after drying was 6 μm.
At that time, the UV curable urethane acrylate resin and the thermosetting acrylic urethane resin used as the second surface protective layer are appropriately matted with silica so that the 60 ° specular gloss value according to JIS Z 8741 is 20. The one with the agent added internally was used.
(7) Subsequently, the coating film was cured by ultraviolet irradiation (high pressure mercury lamp, 200 mJ / cm ² ) to obtain a decorative sheet.

<Example 2>
A decorative sheet of Example 2 was prepared in the same manner as in Example 1 except that the matting composition of the second surface protective layer was changed so that the 60 ° specular gloss value according to JIS Z 8741 was 27. did.
<Example 3>
A decorative sheet of Example 3 was prepared in the same manner as in Example 1 except that the matting agent in the second surface protective layer was changed so that the 60-degree specular gloss value according to JIS Z 8741 was 35. did.

<Comparative Example 1>
A decorative sheet of Comparative Example 1 was prepared in the same manner as in Example 1 except that the matting composition of the second surface protective layer was changed so that the 60 ° specular gloss value according to JIS Z 8741 was 8. did.
<Comparative example 2>
A decorative sheet of Comparative Example 2 was prepared in the same manner as in Example 1 except that the matting composition of the second surface protective layer was changed so that the 60 ° specular gloss value according to JIS Z 8741 was 40. did.

<Creation of decorative panel for evaluation>
The decorative sheets prepared in Examples 1 to 3, Comparative Example 1 and Comparative Example 2 were bonded to the surface of a 3 mm thick MDF (hardwood) to obtain cosmetic materials for evaluation. As an adhesive for the bonding, a two-component aqueous emulsion adhesive (Rikabond (registered trademark) BA-10L / BA-11B = 100: 2.5 manufactured by Chuo Rika Kogyo Co., Ltd.) was used. Then, this two-part aqueous emulsion adhesive was applied in a wet state with a coating amount of 100 g / m ² , and a decorative sheet was bonded to the surface of the MDF. Subsequently, it was cured for 24 hours to obtain a decorative board (decorative board for evaluation).

<Evaluation items and evaluation methods>
The decorative board for evaluation using the decorative sheets prepared in Examples 1 to 3, Comparative Example 1 and Comparative Example 2 was tested and evaluated by the following evaluation items and evaluation methods.
(1) Measurement of 60-degree specular gloss value The test method was performed according to JIS Z 8741.

(2) Wipeability test “Tiger Putty 120” (for both base and finish) made by Yoshino Gypsum is hand-applied on each evaluation decorative plate, cured for 1 hour, then wiped with a mop that has been wrung out with water, and then wiped dry. It was.
And the sensory test (wiping unevenness confirmation) was implemented with respect to 10 testers.
The evaluation indicators are as follows.
◎: 10 people who are good ○: 7 to 9 people who are good X: 0 to 6 people who are good

(3) Design sensory test For each evaluation decorative plate, a gloss test as a decorative material was conducted on ten testers.
The evaluation indicators are as follows.
◎: 10 people who are good ○: 7 to 9 people who are good X: 0 to 6 people who are good

(4) Static friction coefficient measurement About each decorative decorative board, the static friction coefficient was measured with the portable friction meter (Shinto Chemical Co., Ltd. product "HEIDON tribogear Muse Type94i-II"). For the measurement, plain woven cotton was used as a slip piece, and an average value of 20 times was taken as a measured value.
The evaluation indicators are as follows.
◎: 0.43 or more ○: 0.40 or more and less than 0.43 ×: Less than 0.40

(5) Scratch resistance test For each decorative veneer for evaluation, a commercially available steel wool (“Bonster # 0-1” manufactured by Nippon Steel Wool Co., Ltd.) was cut into a square shape of 1 cm square, and this was 20 at a load of 1 kg. Scratched back and forth.
The index of evaluation is as follows.
A: No scratches are observed on the surface of the test area, and no gloss change from the surface of the untested area is observed.
◯: No scratches are observed on the surface of the test area, and a slight gloss change from the surface of the untested area is observed.
X: Scratches are observed on the surface of the test part, and a gloss change from the surface of the untested part is observed.

<Evaluation results>
The evaluation results are shown in Table 1.

In Examples 1 to 3, in any evaluation item, the evaluation is “◯” or more, and the 60-degree specular gloss value of the second surface protective layer shows a good result in the range of 20 to 35. It was.
In Comparative Example 1 in which the 60 ° specular gloss value of the second surface protective layer was 8, it was confirmed that unevenness after wiping was relatively noticeable. This indicates that the gloss value is effective in conspicuous wiping unevenness.
In Comparative Example 2 in which the 60-degree specular gloss value of the second surface protective layer is 40, the wiping resistance is excellent, but the pattern tends to be difficult to see due to the reflection of light, and the design is rejected. From this, it can be seen that there is an effect when the 60-degree specular gloss value is 35 or less in order to satisfy the design properties.

Comparing Comparative Examples 1 and 2, it is shown that the results are counter electrodes in each evaluation, and it is indicated that there is an inconvenience in certain performance if the 60-degree specular gloss value is too large or too small. Therefore, it has been found that it is important to select an appropriate range of gloss values.
When these results are combined, the outermost 60-degree specular gloss value is 20 or more and 35 or less, so that it is possible to provide a decorative sheet having excellent cleaning properties and excellent design properties. I understand. In particular, when the 60 ° specular gloss value of Example 2 is 27, the balance of the overall evaluation seems to be good.
From the above results, according to the present invention, it is verified that it is possible to provide a decorative sheet having excellent cleaning properties and excellent design, and a moisture-proof decorative board, building material, and decorative board using this decorative sheet. We were able to.

DESCRIPTION OF SYMBOLS 1 Base material sheet 2 Picture pattern layer 3 Transparent adhesive layer 4 Transparent thermoplastic resin layer 5 1st surface protective layer 6 2nd surface protective layer (outermost layer)
7 Surface protective layer 8 Back surface resin coating layer 10 Decorative sheet 11 First adhesive layer 12 Wood substrate 13 Second adhesive layer 14 Moisture proof sheet 20 Moisture proof decorative plate 21 Core materials 30, 40 Building material

Claims (6)

A wooden substrate;
A decorative sheet provided on one side of the wooden substrate;
A moisture-proof sheet provided on the other surface side of the wooden substrate,
The decorative sheet is
A resin base sheet;
A pattern layer provided on the surface of the substrate sheet opposite to the wooden substrate;
A transparent adhesive layer provided on the pattern layer;
A transparent thermoplastic resin layer provided on the transparent adhesive layer;
A surface protective layer provided on the transparent thermoplastic resin layer,
The moisture-proof decorative board, wherein the outermost layer located at least on the outermost surface of the surface protective layer has a 60-degree specular gloss value of 20 to 35 in accordance with JIS Z 8741.   The outermost layer is mainly composed of a mixture of an ionizing radiation curable resin and a thermosetting resin, and contains a matting agent, and the content of the matting agent is less than 10% by mass. The moisture-proof decorative board according to claim 1. The decorative sheet is
The moisture-proof decorative board according to claim 1 or 2, further comprising a silica-containing resin layer that is provided on a surface opposite to the pattern layer of the base sheet and includes silica powder.   A building material comprising the moisture-proof decorative board according to any one of claims 1 to 3. A wooden substrate;
A decorative sheet provided on one side of the wooden substrate,
The decorative sheet is
A resin base sheet;
A pattern layer provided on the surface of the substrate sheet opposite to the wooden substrate;
A transparent adhesive layer provided on the pattern layer;
A transparent thermoplastic resin layer provided on the transparent adhesive layer;
A surface protective layer provided on the transparent thermoplastic resin layer,
A decorative board, wherein the outermost layer located at least on the outermost surface of the surface protective layer has a 60-degree specular gloss value of 20 or more and 35 or less in accordance with JIS Z 8741. A resin base sheet;
A pattern layer provided on one surface of the base sheet;
A transparent adhesive layer provided on the pattern layer;
A transparent thermoplastic resin layer provided on the transparent adhesive layer;
A surface protective layer provided on the transparent thermoplastic resin layer,
The outermost layer located at least on the outermost surface of the surface protective layer has a 60-degree specular gloss value of 20 or more and 35 or less in accordance with JIS Z 8741.

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