JPH0999402A - Surface decorative laminate and surface decorative woody plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface decorative woody plate capable of simplifying the manufacturing steps without increasing the cost and having at least one of the excellent moisture resistance and surface smoothness, and a surface decorative laminate for obtaining such a surface decorative woody material. SOLUTION: This surface decorative woody plate 10h is formed by so adhering surface laminates 13b to one or both the surfaces of a base material layer 11 via an adhesive 12 that its back sheet 24 is disposed at the layer 11 side. The laminate 13b is formed by laminating and adhering the sheet 24 having Gurley stiffness of 50mg or more onto a decorative sheet 16 via a modified thermoplastic resin layer 14 having moisture permeability of 100g/m<2> .24hr or less and adhering function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-decorated wood board used for interior materials such as houses and components such as furniture, and has at least one of excellent moisture resistance and rigidity. By using the surface-decorated laminate, the surface-decorated wood board has at least one of excellent moisture resistance and excellent surface smoothness without increasing the cost.

[0002]

2. Description of the Related Art An example of a conventional surface decorative wood board is shown in FIG. In this surface-decorated wood board, a moisture-permeable decorative sheet 3 is attached to the surface of a wood base material layer 1 via an adhesive layer 2 made of an adhesive. As a material for the above-mentioned wood base material layer 1, particle boards (P / B) and directional wood thin plate laminated boards (OSB) using wood chips, which have been conventionally discarded as wood, are taken into consideration in consideration of forest protection problems and price. ), Medium density fiberboard (MDF), orthogonal plywood (R / C), etc. were suitably used. Makeup sheet 3
As such, printing paper, wallpaper such as cloth, decorative veneer, veneer and the like were used.

[0003]

However, in this type of surface-decorated wood board, when it is used in a humid area or a humid atmosphere like in Japan, there is a risk of warpage. Further, when a wood base material layer 1 having an uneven portion such as P / B or OSB is used, or the wood base material layer 1 absorbs moisture such as P / B, OSB or MDF. However, when a material that easily expands is used, the decorative sheet 3 may pick up irregularities on the surface of the wooden base material layer 1 and cause poor surface smoothness.

Therefore, as a measure for preventing warpage, a method of attaching a decorative sheet 3 to both surfaces of a wooden base material layer 1 to form a structure having symmetrical rigidity on the front and back sides, and an adhesive 2 made of a material having a low water content is used. A method of using, a method of applying a water repellent to the wood base material layer 1, a method of using a material having a small dimensional change as the wood base material layer 1, a method of making the wood base material layer 1 into a wood edge, A method of controlling the water content, a method of attaching a rigid backer such as phenol or melamine to the surface of the wood base material layer 1, a method of forming a flash structure, etc. have been adopted. As a measure for improving the surface smoothness, a method of sticking a backer, plywood, MDF or the like having good surface smoothness on the surface of the wooden base material layer 1, and filling the uneven portion of the surface of the wooden base material layer 1 with putty. For the material such as P / B, which is likely to expand due to moisture absorption, a method has been adopted in which the surface is sanded and the surface is flattened after the humidity is adjusted in advance.

However, when the above-mentioned warp prevention measures or smoothness improvement measures are adopted, as a result of the reasons that the material is expensive and the manufacturing process becomes complicated, as a result, There was a drawback that the cost of the wood board was high.

The present invention has been made in view of these circumstances, and the manufacturing process can be simplified, the cost does not increase, and the moisture resistance and the surface smoothness are excellent. It is an object of the present invention to provide a surface-decorated wood board having at least one characteristic, and a surface-decorated laminate for obtaining such a surface-decorated wood material.

[0007]

According to a first aspect of the present invention, the moisture permeability is 100 g / m ² · 24 h on the decorative sheet.
Below, a surface decorative laminate in which a modified thermoplastic resin layer having an adhesive function is laminated is used as a means for solving the above problems. In the invention according to claim ² , a surface decorative laminate obtained by laminating a resin sheet having a moisture permeability of 100 g / m ² · 24 h or less on a decorative sheet via a resin adhesive layer is used as a means for solving the above problems. .

According to the third aspect of the present invention, a surface makeup obtained by laminating a back sheet on a decorative sheet with a modified thermoplastic resin layer having a moisture permeability of 100 g / m ² · 24 h or less and having an adhesive function. The laminated body was used as a means for solving the above problems. In the invention according to claim 4, a resin sheet having a water vapor permeability of 100 g / m ² · 24 h or less and a back sheet formed on the resin sheet are laminated on a decorative sheet via a resin adhesive layer. The above surface decorative laminate was used as a means for solving the above problems.

In a fifth aspect of the invention, in the surface decorative laminate of the third or fourth aspect, the backsheet having a Gurley stiffness of 50 mg or more is used. According to the sixth aspect of the invention, a surface decorative laminate obtained by laminating a back sheet having a Gurley stiffness of 50 mg or more on a decorative sheet via a resin adhesive layer is used as a means for solving the above problems.

In the invention according to claim 7, the surface decorative laminate according to claim 1 or 2 is provided with a modified thermoplastic resin layer or a resin sheet on one or both sides of the base material layer via an adhesive. A surface-decorated wood board, which is adhered so as to be on the side of the base material layer, was used as a means for solving the above problems. In the invention according to claim 8, the backsheet of the surface decorative laminate according to any one of claims 3 to 6 is provided on one side or both sides of the base material layer with an adhesive on the back sheet side. A surface-decorated wood board, which is adhered as described above, is used as a means for solving the above problems.

The present inventor has conducted various studies and experiments on the cause of the warpage in the case of a surface-decorated wood board having asymmetrical front and back, and as a result, from the surface-decorated material of the surface-decorated wood board to the wood-base layer. This is due to the movement of water, which increases the difference in expansion coefficient between the surface decorative material and the wood base material layer that easily absorbs moisture, and increases the dimensional difference between the wood base material layer and the surface decorative material. , It was found that the phenomenon of warpage occurs, and if the resin sheet satisfying the condition that the moisture permeability is 100 g / m ² · 24 h or less can be used, it is possible to prevent the water migration as described above.
We have found that it is possible to prevent the warp of the surface decorative wood board.

In the present invention, the water vapor permeability is 100 g / m ²
The reason why the resin sheet satisfying the condition of 24 hours or less is used is as follows. For example, MDF with a thickness of 21 mm, a length of 2,267 mm, and a width of 396 mm
12 μm thick polyester sheet on both sides of
0g / m ² · 24h) was attached and pasted with an EVA emulsion adhesive to prepare a test piece, and the ambient temperature was set to 3
Room A kept at 5 ℃ and 90% humidity, and ambient temperature 35
At the boundary with the B room kept at 20 ° C and 20% humidity, the test pieces were placed upright so as to separate the A room and the B room, and the warp amount of the test piece after being left for 48 hours was examined. (Below,
Described as a warp test. ) However, the warp amount in the length direction is 3.5.
mm. From this result, it was found that the above-mentioned test piece passed the standard (warp amount of 5 mm or less) used as a wood panel product such as a closet door.

Then, the amount of warpage when the moisture permeability of the polyester sheet or polyethylene sheet was changed to various values was measured by the above-described warpage test, and the relationship between the moisture permeability and the amount of warpage was investigated. As a result, the water vapor permeability (measured according to JIS Z0208-1976 moisture vapor proofing test method condition B of JIS Z0208-1976) of about 10 is satisfied.
It was found that the limit was 0 g / m ² · 24 h. The results here are shown in FIG. FIG. 1 is a graph showing the relationship between moisture permeability and the amount of warpage. Therefore, the water vapor permeability of 100 g / m ²
-It was found that 24h is the upper limit that satisfies the criteria that the warp amount of the surface-decorated wood board is 5 mm or less.

Further, when the inventor of the present application uses a wood base material layer having an uneven portion having a surface roughness of about 50 μm to 2000 μm on the surface such as OSB and P / B, the surface smoothness of the surface-decorated wood board is improved. As a result of various studies and experiments to improve the quality of the material, the surface of the wood base material has excellent rigidity, namely, Gurley stiffness (J. TAPPI Paper Pulp Test Method No. 40-83 Paper and paperboard by load bending method). 50m in accordance with the stiffness test method (Gurley method)
It has been found that it is difficult for the surface decorative material to pick up the irregularities of the wood base material layer by covering with a back sheet of g or more.

In the present invention, the Gurley stiffness is 50 m.
The reason why the backsheet satisfying the condition of g or more is used is as follows. Various OSBs with different surface roughness are prepared, and a paper sheet of various Gurley stiffness (thickness 0.1 mm, surface roughness 2 is provided on this OSB (thickness 21 mm, length 2,267 mm, width 396 mm).
0 μm) was attached to the test pieces, and the relationship between the Gurley stiffness and the surface roughness (μm) was examined for these test pieces. In Fig. 2, the unevenness of the wood base material layer is not picked up with a paper sheet having a surface roughness of about 20 μm (surface roughness of 40 μm or less).
The relationship between the Gurley stiffness of the paper sheet and the wood base material layer having irregularities on the surface was shown.

From the results shown in FIG. 2, when the surface roughness of the wood base material layer is 50 μm to 2000 μm, the Gurley stiffness of the paper sheet which can make the surface roughness of the surface decorative wood board 40 μm or less is obtained. It was found that the amount should be 50 mg or more.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION In order to make the present invention easier to understand, examples of the surface decorative laminate and the surface decorative wooden board of the present invention will be described below. Such an example shows one embodiment of the present invention and does not limit the present invention. It can be arbitrarily changed within the scope of the present invention. FIG. 3 is a cross-sectional view showing a first example of the surface decorative wood board of the present invention.
In the figure, reference numeral 10 is a surface-decorated wood board of the first example, and this surface-decorated wood board 10 has a first surface-decoration laminate 13 on the upper surface of a base material layer 11 via an adhesive 12. The modified thermoplastic resin layer 14 is adhered to the base material layer 11 side.

The base material layer 11 is made of wood material such as particle board (P / B), directional wood thin plate (OSB), medium density fiberboard (MDF), orthogonal plywood (R / C). Is. The wood flakes laminated plate herein is a product in which wood flakes having a thickness of 0.2 to 1.5 mm are bonded with a binder and are integrally molded. The medium-density fiberboard is made of wood and other plant fibers as a main raw material, and has a specific gravity of 0.4 or more and less than 0.8 formed by once fiberizing them. Orthogonal plywood is a laminate made by laminating and laminating so that the fiber directions of the single plates are alternately at right angles. An adhesive forming the adhesive 12 is applied to the upper surface of the base material layer 11.

As the material forming the adhesive 12, urea resin, urea-melamine resin, a mixture of styrene-butadiene rubber (SBR) and melamine resin, styrene-
A mixture of butadiene rubber and urea resin, vinyl-urethane resin, vinyl acetate resin, epoxy resin, urethane resin, phenol resin, ethylene-vinyl acetate copolymer,
Polyamide, polyester, etc. are used. A first surface decorative laminate 13 is laminated on the adhesive 12.

The first surface decorative laminate 13 has a moisture permeability of 100 g / m ² · 24 h or less on the decorative sheet 16,
In addition, the modified thermoplastic resin layer 14 satisfying the condition of having an adhesive function is laminated. The decorative sheet ^{16, 10g / m 2 ~100g / m} 2 about print decorative ^{paper, 10g / m 2 ~300g / m} 2 about paper, wallpaper such as printing paper or cloth wallpaper cosmetic surface material, decorative single A plate, a vinyl chloride resin laminated decorative material, a diallyl phthalate resin-impregnated and hardened decorative material, a melamine resin-impregnated and hardened decorative material, a decorative cloth and the like are used. As the decorative veneer here, a veneer having a thickness of about 0.1 mm to 3.0 mm and made of oak, cypress, teak, walnut, spruce, oak or the like is used.

As the material forming the modified thermoplastic resin layer 14 satisfying the above-mentioned conditions, a material exhibiting thermoplasticity or thermosetting property and also having an adhesive function is used, and for example, polyethylene, polycarbonate, polyester, Resins such as polypropylene, ethylene vinyl acetate copolymer, ionomer, polyvinyl chloride and urethane are used. The moisture permeability of the modified thermoplastic resin layer 14 is 100 g.
If / m exceeds ² · 24h when the surface decorative wood board is used such as in high humidity atmosphere, it can not be sufficiently prevented from moisture moves to the substrate layer 11 from the decorative sheet 16 surface, surface decorative wood board 10 This is because the warp tends to occur.

The modified thermoplastic resin layer 14 has a thickness of about 5 μm to 100 μm, preferably 10 μm to 8 μm.
0 μm. The thickness of the modified thermoplastic resin layer 14 is 5μ
When it is less than m, when the surface-decorated wood board 10 is used in a humid atmosphere or the like, it is not possible to sufficiently prevent water from moving from the surface of the decorative sheet 16 to the base material layer 11, and thus the surface-decorated wood board 10 has Warpage may occur, while 100 μm
Even if the thickness is exceeded, the effect cannot be expected to increase any more, and it is economically disadvantageous. It is desirable that the modified thermoplastic resin layer 14 and the decorative sheet 16 described above are bonded to each other before being laminated on the base material layer 11 to form the first surface decorative laminate 13.

As a method for producing such a first surface decorative laminate 13, for example, the above-mentioned modified thermoplastic resin is melted, and the modified thermoplastic resin liquid is applied to the decorative sheet 16 by using a flow coater or the like. It can be produced by a method of coating so as to form a coating film on the back surface, or by laminating a modified thermoplastic resin sheet on the decorative sheet 16 and then thermocompression bonding.

In the surface-decorated wooden board 10 of the first example, due to the above-mentioned constitution, even if the surface-decorated wooden board 10 is used in a humid atmosphere, moisture will move from the surface of the decorative sheet 16 to the base material layer 11. Of the modified thermoplastic resin layer 14 having a low water vapor transmission rate.
Can be sufficiently prevented by the first surface decorative laminate 13
The difference in expansion coefficient between the base material layer 11 and the base material layer 11 can be prevented from increasing, and the dimensional difference between the base material layer 11 and the first surface decorative laminate 13 is less likely to occur, thus preventing warpage. be able to.

Further, in the surface-decorated wood board 10 of the first example, the first surface-decorated laminate 13 is provided on one surface of the base material layer 11 with the adhesive 12 interposed therebetween.
4 has been described so as to adhere to the base material layer 11 side, but the first surface decorative laminate 13 is provided on both surfaces of the base material layer 11 with the adhesive 12 interposed therebetween and the modified thermoplastic resin layer thereof. You may adhere so that 14 may be the said base material layer 11 side.

FIG. 4 is a sectional view showing a second example of the surface-decorated wood board of the present invention, and the reference numeral 10a in FIG. 4 is the surface-decorated wood board of the second example. The same components as those of the surface-decorated wooden board 10 of the first example are designated by the same reference numerals to simplify the description. In the surface-decorated wood board 10a of the second example, a resin sheet 14a of the second surface-decorated laminate 13a is provided on the upper surface of the base material layer 11 with an adhesive 12 interposed therebetween.
It is formed by adhering so that it is on the first side.

The second surface decorative laminate 13a has a moisture permeability of 1 on the decorative sheet 16 via the resin adhesive layer 15.
The resin sheets 14a having a weight of 00 g / m ² · 24 h or less are laminated.

The resin sheet 14 satisfying the above conditions
Examples of a include a resin sheet made of polyethylene, polycarbonate, polyester, polypropylene, ethylene vinyl acetate copolymer, ionomer, polyvinyl chloride, urethane, etc., and moisture-proof cellophane. The thickness of the resin sheet 14a is about 5 μm to 100 μm, preferably 10 μm to 80 μm, for the same reason as that of the modified thermoplastic resin layer 14 described above.

Examples of the adhesive forming the resin adhesive layer 15 include emulsion type water-based adhesives such as vinyl acetate resin, acrylic ester resin, ethylene acid vinyl copolymer, vinyl acetate acrylic copolymer, and ionomer resin, and natural adhesives. Latex-type water-based adhesives such as rubber, styrene-butadiene copolymers, acrylonitrile-butadiene copolymers, starch-based starches such as starch and dextrin, protein-based glues such as glue and casein, carboxymethylcellulose-based cellulose-based, polyvinyl alcohol etc. Examples include water-soluble adhesives of molecular type, solvent-type adhesives of polyurethane, polyester, epoxy, vinyl chloride, etc., and solventless adhesives of polyurethane, polyester, epoxy, etc.

In the surface-decorated wood board 10a of the second example, due to the above-mentioned constitution, even if the surface-decorated wood board 10a is used in a humid atmosphere, moisture moves from the surface of the decorative sheet 16 to the base material layer 11. Can be sufficiently prevented by the resin sheet 14a having a low moisture permeability, so that the difference in expansion coefficient between the second surface decorative laminate 13a and the base material layer 11 can be prevented from increasing, and the base material layer 11 and The dimensional difference from the second surface decorative laminate 13a is less likely to occur, and thus warpage can be prevented from occurring.

FIG. 5 is a cross-sectional view showing a third example of the surface-decorated wood board of the present invention, and the reference numeral 10b in FIG. 5 is the surface-decorated wood board of the third example. The same components as those of the surface-decorated wooden board 10 of the first example are designated by the same reference numerals to simplify the description. In the surface-decorated wood board 10b of the third example, the backsheet 24 of the third surface-decorated laminate 13b is provided on the upper surface of the base material layer 11 via the adhesive 12.
It is formed by adhering so that it is on the first side.

In the third surface decorative laminate 13b, the back sheet 24 is provided on the decorative sheet 16 with the moisture permeability of 100 g / m ² · 24 h or less and the modified thermoplastic resin layer 14 having an adhesive function interposed therebetween. It is made up of layers. The back sheet 24 has a thickness (weighing) of 10 g / m.
A sheet-shaped material of about ^{2 to} 1,000 g / m ² is used, and examples thereof include paper and adhesive resin-impregnated paper such as polyester-impregnated paper, phenol-impregnated paper, diallylphthalate-impregnated paper, and melamine-impregnated paper. As the back sheet 24, it is desirable to use one having a Gurley stiffness of 50 mg or more. Back sheet 24 in this case
The thickness of a 80g / m ² ~1,000g / m ² approximately. When the Gurley stiffness of the back sheet 24 is less than 50 mg, the rigidity is insufficient and the decorative sheet is laminated on the upper surface of the base material layer 11 via the adhesive 12 or when the base material layer 11 expands due to moisture absorption. 16 may pick up irregularities on the surface of the base material layer 11, and the surface smoothness may become poor.

In the surface-decorated wood board 10b of the third example, the back sheet 24 is provided on the side of the surface-decorated laminate 13b which is adhered to the base material layer 11, so that the first sheet is not provided.
As compared with the surface-decorated wood board 10 of the above example, there is an effect that the adhesiveness between the base material layer 11 and the surface-decorated laminate 13b is excellent.
The upper limit of the thickness of the back sheet 24 for obtaining such effects is 80 g / m ² . Further, in the case where the back sheet 24 having a Gurley stiffness of 50 mg or more is provided, even if the base material layer 11 having an uneven portion having a surface roughness of 50 μm to 2,000 μm is used, the base material layer 11 Since the irregularities of the base sheet are covered with the back sheet 24 having excellent rigidity, the decorative sheet 16 is prevented from picking up irregularities on the surface of the base material layer 11 and has good surface smoothness, which is also aesthetically preferable. Becomes

FIG. 6 is a sectional view showing a fourth example of the surface-decorated wood board of the present invention, and the reference numeral 10c in FIG. 6 is the surface-decorated wood board of the fourth example. The same components as those of the surface-decorated wooden board 10a of the second example are designated by the same reference numerals to simplify the description.

The surface-decorated wood board 10c of the fourth example is
The fourth surface decorative laminate 13c is adhered to the upper surface of the base material layer 11 with an adhesive 12 so that the back sheet 24 of the fourth surface decorative laminate 13c is on the base material layer 11 side. The fourth
The surface decorative laminate 13c of No. 1 has a moisture permeability of 100 g / m ² · 24 h on the decorative sheet 16 via the resin adhesive layer 15.
The following resin sheet 14a and a back sheet 24 formed on the resin sheet 14a are laminated. Further, as the back sheet 24 here, it is desirable to use one having a Gurley stiffness of 50 mg or more for the same reason as the surface-decorated wood board of the third example.

In the surface-decorated wooden board 10c of the fourth example, the backsheet 24 is provided on the side of the surface-decorated laminate 13b to which the base material layer 11 is adhered, so that the second sheet is used.
There is an effect that the adhesiveness between the base material layer 11 and the resin sheet 14a is improved as compared with the surface-decorated wood board 10a of the example.
In addition, Gurley stiffness of 50 mg or more back sheet 24
In the case where the base material layer 11 having a surface roughness of 50 μm to 2,000 μm is used as the base material layer 11, the back sheet having excellent rigidity in the base material layer 11 Since it is covered with 24, the decorative sheet 16 is prevented from picking up irregularities on the surface of the base material layer 11, and the surface smoothness is good, which is also aesthetically preferable.

FIG. 7 is a sectional view showing a fifth example of the surface-decorated wood board of the present invention. Reference numeral 20 in FIG. 7 is the surface-decorated wood board of the seventh example. The same components as those of the surface-decorated wooden board 10 of the first example are designated by the same reference numerals to simplify the description. In the surface-decorated wood board 20 of the fifth example, the second surface-decorated laminate 23 and the backsheet 24 of the second surface-decorated laminate 23 are provided on the upper surface of the base material layer 21 having irregularities on the surface via the adhesive 12. The base material layer 21 is adhered to the side of the base material layer 21.

The base material layer 21 here is the above-mentioned first layer.
A wood material similar to the base material layer 11 used in the surface-decorated wood board of the above example and having an uneven portion with a surface roughness of about 50 μm to 2000 μm is preferably used. The fifth surface decorative laminate 23 has a Gurley stiffness of 50 mg or more 70 on the decorative sheet 16 via a resin adhesive layer 25,
The back sheets 24 satisfy the condition of 000 mg or less are laminated.

As a material forming the resin adhesive layer 25, an adhesive or an adhesive sheet made of a resin such as urea, melamine, phenol, urethane, rubber, vinyl acetate emulsion, ethylene-vinyl acetate (EVA) emulsion or the like is used. Can be mentioned. Polyester-impregnated paper, melamine-impregnated paper, phenol-impregnated paper, diallyl phthalate-impregnated paper, or the like is used as the back sheet 24 that satisfies the above conditions. Such a back sheet 24
The thickness of the (weighing) is 80g / m ² ~1,000g / m ² approximately.

Gurley stiffness of the back sheet 24 is 50
If the amount is less than mg, the rigidity is insufficient, and when the base material layer 21 is laminated on the upper surface of the base material layer 21 via the adhesive 12 or when the base material layer 21 expands due to moisture absorption, the decorative sheet 16 becomes the base material layer 21. It picks up irregularities on the surface, resulting in poor surface smoothness. On the other hand, even if the Gurley stiffness is increased to more than 70,000 mg, the effect cannot be expected to increase anymore, the productivity is poor, the cost is high, and it is economically disadvantageous. The back sheet 24 has a thickness of about 50 to 20,000 μm.

In the surface-decorated wood board 20 of the fifth example, the surface roughness of 50 μm or more is obtained by adopting the above-mentioned configuration.
Even if the base material layer 21 having a rugged portion of 2,000 μm is used or the base material layer 21 expands when used in a humid atmosphere, the rugged portion of the base material layer 21 has excellent rigidity. As it is covered with a back sheet 24,
6 is prevented from picking up irregularities on the surface of the base material layer 21 and has good surface smoothness, which is aesthetically pleasing.

In the surface-decorated wooden board 20 of the fifth example, the backsheet 24 of the fifth surface-decorated laminate 23 is provided on one surface of the substrate layer 21 via the adhesive 12. Although the case where they are adhered so as to be on the 21st side has been described, the backsheet 24 of the fifth surface decorative laminate 23 is attached to both sides of the base material layer 21 via the adhesive 12 and the backsheet 24 is on the base material layer 21 side. You may adhere so that.

(Experimental Example 1) Between a print paper (reinforced paper between sheets) having a thickness of 30 g / m ² (trade name: Daisek Sheet Dai Nippon Printing Co., Ltd.) and a thin paper having a thickness of 20 g / m ^2. Polyethylene resin (trade name; Mitsubishi Polyethylene-LD
LM-40) melted at 250 to 330 ° C. is interposed so as to have a thickness of 50 μm (water vapor transmission rate 15 g / m ² · 24 h) and extrusion laminated at a linear pressure of 35 kg / cm to produce a surface decorative laminate. did. The moisture vapor permeability of this surface decorative laminate was 14 g / m ² · 24 h. Two such surface decorative laminates were prepared.

Then, an adhesive (commercial name: Bond CV3105, manufactured by Konishi Co., Ltd.) made of EVA emulsion was applied at 70 to 80 g / m ² on both sides of a 21 mm thick OSB (Wearhauser Star Dee Wood). Then, the surface decorative laminates prepared on both sides are laminated so that the thin papers thereof are on the OSB side, and about 40 to 5
At 0 ° C., a pressure of 1.0 to 2.0 kg / cm ² was applied to bond and a surface decorative wood board was obtained. The surface-decorated wood board thus obtained was placed in a room A kept at an ambient temperature of 35 ° C. and a humidity of 90%,
A room B and a room B kept at an ambient temperature of 35 ° C. and a humidity of 20% were placed so as to separate the room A and the room B, and a warp test was conducted to examine the warp amount after standing for 48 hours. Warp amount 2mm (length 2267mm, width 396m
m), which proved to be less likely to warp.

(Experimental Example 2) An EV was printed on the surface of a print paper having a thickness of 30 g / m ² (paper reinforced paper, surface roughness of about 10 μm) (trade name: Daisek Sheet Dai Nippon Printing Co., Ltd.).
Adhesive consisting of A emulsion is applied, and the Gurley stiffness is 3,500 mg in the vertical direction and 1,600 in the horizontal direction.
After being laminated with 207 g / m ² of polyester impregnated paper (198 g of base paper, impregnated with 40% of polyester) in mg,
A surface decorative laminate was produced by applying a linear pressure of 35 kg / cm and adhering at about 150 to 80 ° C.

Then, the surface has a surface roughness of 100 to 200 μm.
An adhesive (commercial name: CV3105, manufactured by Konishi Co., Ltd.) made of EVA emulsion is applied at 70 to 80 g / m ² on the upper surface of a 21 mm thick OSB (Wearhauser Star Dee Wood) having m irregularities. Then, the surface decorative laminate prepared previously is laminated thereon so that the polyester-impregnated paper of the laminate is on the OSB side, and about 40-50.
A pressure of 1.0 to 2.0 kg / cm ² was applied at 0 ° C. to bond and a surface-decorated wood board was obtained. When the appearance of the obtained surface-decorated wood board was visually examined, it was not found that OSB irregularities were picked up on the print paper on the surface. Moreover, when the surface roughness of the print paper was measured, it was 39
It was found to have a good smoothness and a favorable appearance.

(Experimental Example 3) Print paper having a thickness of 30 g / m ² (paper-strengthened paper, surface roughness of about 10 μm) (trade name: Daisek Sheet Dai Nippon Printing Co., Ltd.) and Gurley stiffness in the vertical direction 3,500 mg, lateral 1,600 mg
And a polyester-impregnated paper with a thickness of 277 g / m ² (base paper 1
Polyethylene resin (trade name; Mitsubishi Polyethylene-LD LM-40) between 98 g and 40% polyester impregnation)
Melted at 250 ℃ -330 ℃ thickness 50μm
The surface decorative laminated body was produced by interposing so as to have (moisture permeability of 15 g / m ² · 24 h) and extruding and laminating at a linear pressure of 35 kg / cm. The moisture vapor permeability of this surface decorative laminate was 11 g / m ² · 24 h. The Gurley stiffness was measured to be 7,000 mg in the vertical direction and 4,0 in the horizontal direction.
It was 00 mg. Two such surface decorative laminates were prepared.

Next, an adhesive (commercial name: Bond CV3105, Konishi) made of EVA emulsion was applied to both sides of a 21 mm thick OSB (Wearhauser Stardy Wood) having irregularities with a surface roughness of 400 μm (maximum value). Co., Ltd.) at 70 to 80 g / m ² , and then the surface decorative laminates prepared on both sides are laminated so that the polyester-impregnated paper of the laminate is on the OSB side, and at about 40 to 50 ° C. A pressure of 1.0 to 2.0 kg / cm < ² > was applied to bond and obtain a surface-decorated wood board. A warp test was conducted on the obtained surface-decorated wood board in the same manner as in Experimental Example 1 above. As a result, a warp amount of 1.5 mm (length 22
67 mm, width 396 mm), which proved to be warped. The appearance of the obtained surface-decorated wood board was visually inspected.
I could not find that I picked up the unevenness of SB. The surface roughness of the print paper was 37 μm, and
It was found that the smoothness was good and the appearance was favorable.

[0049]

As described above, the first and second aspects are provided.
Since the surface decorative laminate described above has the above-mentioned constitution, it has excellent moisture resistance. Further, since the surface decorative laminate according to claims 3 and 4 has the above-mentioned constitution, it is excellent in moisture resistance and, at the same time, when adhered to the base layer, adhesion between the base layer and the surface decorative laminate. There is an effect that the property is particularly excellent. Further, since the surface decorative laminate according to claim 5 has the above-mentioned configuration, it has excellent moisture resistance and rigidity. Further, since the surface-decorated laminate according to claim 6 has the above-mentioned configuration, it has excellent rigidity.

Further, in the surface-decorated wood board using the surface-decorated laminate according to claim 1 or 2, even when it is used in a humid atmosphere, water moves from the surface of the decorative sheet to the base material layer. Can be sufficiently blocked by the modified thermoplastic resin layer or resin sheet having a low water vapor transmission rate, so that the difference in the expansion coefficient between the surface decorative laminate and the base layer can be prevented from increasing, and the base layer and the surface decorative layer can be reduced. A dimensional difference from the laminated body is less likely to occur, and thus warpage can be prevented from occurring. Also,
The surface-decorated wood board using the surface-decorated laminate according to claim 3 or 4 has the same effects as those of the surface-decorated wood board using the surface-decorated laminate according to claim 1 or 2. The adhesiveness between the material layer and the surface decorative laminate is particularly excellent.

Further, in the surface-decorated wood board using the surface-decorated laminate according to the fifth aspect, even when the surface-decorated wood board is used in a humid atmosphere, moisture is prevented from moving from the surface of the decorative sheet to the base material layer. A modified thermoplastic resin layer or resin sheet having a low water vapor transmission rate can sufficiently prevent the expansion of the difference in expansion coefficient between the surface decorative laminate and the base material layer, and reduce the base material layer and the surface decorative laminate. It becomes difficult for the dimensional difference to occur, and thus warpage can be prevented from occurring. Further, the surface roughness is 50 μm
Even if a base material layer having an unevenness of 2,000 μm is used, the unevenness of the base material layer is covered with the back sheet having excellent rigidity, so that the decorative sheet picks up the unevenness on the surface of the base material layer. And the surface smoothness is good, which is aesthetically pleasing.

The surface-decorated wood board using the surface-decorated laminate according to claim 6 has a surface roughness of 50 μm to 50 μm.
Even if a base material layer having an uneven portion of 2,000 μm is used or the base material layer expands when used in a humid atmosphere, the unevenness on the surface of the base material layer has excellent rigidity. Since it is covered with the sheet, the decorative sheet is prevented from picking up irregularities on the surface of the base material layer, and the surface smoothness is good, which is also aesthetically pleasing. Therefore, according to the present invention, it is possible to simplify the manufacturing process, without increasing the cost,
Further, it is possible to provide a surface-decorated wood board having at least one of excellent moisture resistance and excellent surface smoothness, and a surface-decorated laminate for obtaining such a surface-decorated wood board.

[Brief description of drawings]

FIG. 1 is a graph showing the relationship between moisture permeability and the amount of warpage.

FIG. 2 is a Gurley stiffness of a paper sheet and a wood base material layer having unevenness on the surface when the paper base material having a surface roughness of about 20 μm does not pick up the unevenness of the wood base material layer (surface roughness 40 μm or less). It is a graph showing the relationship with.

FIG. 3 is a cross-sectional view showing a first example of a surface decorative wood board of the present invention.

FIG. 4 is a cross-sectional view showing a second example of the surface decorative wood board of the present invention.

FIG. 5 is a cross-sectional view showing a third example of the surface decorative wood board of the present invention.

FIG. 6 is a cross-sectional view showing a fourth example of the surface decorative wood board of the present invention.

FIG. 7 is a cross-sectional view showing a fifth example of the surface decorative wood board of the present invention.

FIG. 8 is a sectional view showing an example of a conventional surface decorative wood board.

[Explanation of symbols]

10, 10a, 10b, 10c, 20 ... Surface decorative wood board 11, 21, ... Base material layer, 12 ... Adhesive layer, 13, 13
a, 13b, 13c, 23 ... Surface decorative laminate, 14 ...
Modified thermoplastic resin layer, 14a ... Resin sheet, 15, 2
5 ... Resin adhesive layer, 16 ... Decorative sheet, 24 ... Back sheet.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI technical display location B32B 27/10 B32B 27/10 (72) Inventor Hirohisa Nagashima 10-1 Nakazawa-machi, Hamamatsu-shi, Shizuoka Yamaha Stock Company (72) Inventor Tatsuo Iwata 10-1 Nakazawa-machi, Hamamatsu City, Shizuoka Prefecture Yamaha Stock Company

Claims (8)

[Claims] 1. A moisture permeability of 100 g / m on a decorative sheet.
^A surface decorative laminate, which is a laminate of modified thermoplastic resin layers having an adhesive function for 2/24 hours or less. 2. A surface decorative laminate obtained by laminating a resin sheet having a water vapor transmission rate of 100 g / m ² · 24 h or less on a decorative sheet via a resin adhesive layer. 3. A moisture permeability of 100 g / m on a decorative sheet.
^A surface decorative laminate which is laminated for ² hours or less and has a backsheet through a modified thermoplastic resin layer having an adhesive function. 4. A surface makeup in which a resin sheet having a moisture permeability of 100 g / m ² · 24 h or less and a back sheet formed on the resin sheet are laminated on a decorative sheet via a resin adhesive layer. Laminate. 5. The surface decorative laminate according to claim 3, wherein the back sheet has a Gurley stiffness of 50 mg or more. 6. A surface decorative laminate obtained by laminating a back sheet having a Gurley stiffness of 50 mg or more on a decorative sheet via a resin adhesive layer. 7. A modified thermoplastic resin layer or a resin sheet of the surface decorative laminate according to claim 1 or 2 is provided on one side or both sides of the base material layer with an adhesive interposed therebetween. Surface-decorated wood board that is adhered in the same way. 8. The surface decorative laminate according to any one of claims 3 to 6 with an adhesive on one or both sides of the base material layer so that the backsheet of the laminate is on the base material layer side. A surface-decorated wood board that is adhered.