JPH09193326A - Warpage prevention polyester decorative board - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a polyester decorative board using an inexpensive base material having a light specific gravity and having less warpage. SOLUTION: In a polyester decorative board having a decorative layer whose main component is an unsaturated polyester resin containing a thermal polymerization initiator, an inorganic base material is used as the base material, and a sealer layer is provided on the back surface of the base material. It is characterized by being provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses a decorative board used for building interior materials such as building construction and stores, and in particular, uses a fiber cement board such as calcium silicate board, asbestos cement board, gypsum slag cement board as a base material. The present invention relates to a polyester decorative board.

[0002]

2. Description of the Related Art Conventionally, there is a decorative board obtained by subjecting an inorganic base material such as a fiber cement board to a polyester decorative processing, and these decorative boards have been used for building construction, interior decoration of stores and the like.

However, in many cases, the decorative board is warped due to curing shrinkage of the polyester resin on the surface of the decorative board. As a solution, it is general to prevent warpage by using a base material having a large specific gravity, but on the other hand, there are problems such as an increase in the weight of the base material and an increase in the price of the base material.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to use an inexpensive base material having a light specific gravity and to prevent warpage. It is to provide less polyester veneer.

[0005]

In order to solve this problem, the present invention provides a polyester decorative board having a decorative layer whose main component is an unsaturated polyester resin containing a thermal polymerization initiator, in which the above-mentioned base is added. Provided is a warp-preventing polyester decorative board, which comprises an inorganic base material as a material and a sealer layer provided on the back surface of the base material. Further, the sealer layer is characterized in that it is 110 to 160 g / m ² , and the specific gravity of the inorganic base material is less than 1.0 and the thickness thereof is 6 mm.
Provided is a warp-preventing polyester decorative board characterized by the following:

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
FIG. 1 shows a cross-sectional structure of an embodiment of the decorative board of the present invention.
As the inorganic base material 1 in the present invention, a fiber cement board such as a calcium silicate board, an asbestos cement board or a gypsum slag cement board can be used. When the specific gravity of the base material is less than 1.0 and the thickness is 6 mm or less, the cost difference is higher than that of a decorative board using a conventional base material having a high specific gravity and a thickness for preventing warpage. Is clearly preferred according to the invention.

As the resin used for the sealer layer 2 on the back surface of the base material in the present invention, for example, a one-pack type resin such as moisture-curable urethane is preferable because it is easy to work when the sealer layer is provided by coating. .

Application of resin used for sealer layer on back surface of substrate
The amount depends on the thickness of the decorative layer 3 on the surface,
110 g / m for a flat decorative layer^TwoAbove, the surface is uneven
150 g / m for the makeup layer^TwoThe above is appropriate. Was
However, the coating amount is 160 g / m ^TwoIf there is more, it will be nourished after coating.
For the delay of the raw time and the sealer layer on the back surface of the base material
There is wraparound of the resin used, making the coating difficult
You.

The coating viscosity of the resin used for the sealer layer is 15
Approximately 20 seconds (according to "Zahn Cup No. 3" manufactured by Riaisha Co., Ltd.) is suitable, and it is possible to properly penetrate into the base material while forming a sealer layer on the back surface to secure adhesion. It is possible. If it is around 10 seconds, it penetrates into the inside of the base material and the resin layer cannot be formed on the back surface, and if it exceeds 20 seconds, it does not penetrate into the base material at all and the sealer layer easily peels off from the base material. .

The decorative layer containing an unsaturated polyester resin containing a thermal polymerization initiator as a main component in the present invention includes:
The surface of the base material is subjected to a sealer treatment and then the unsaturated polyester resin 5 to which a thermal polymerization initiator is added is applied, or
After the adhesive layer 3 is provided on the sealer-treated surface, the decorative paper 4 is attached thereto, and the unsaturated polyester resin 5 added with the thermal polymerization initiator is coated thereon, and then vinylon or cellophane is applied from above. It is possible to form a decorative layer by coating with a shaped film such as the above, rolling with a rubber roll, defoaming, and then thermosetting the resin.

As described above, according to the present invention, since the sealer layer is formed on the back surface of the base material, it is possible to reduce the warpage due to the curing shrinkage of the polyester resin layer on the front surface, and the low specific gravity and low cost. It is possible to make a decorative board with little warpage even with various base materials. Further, since the sealer layer is provided on the back surface, it becomes possible to prevent moisture from entering from the back surface of the base material, and the water resistance is improved. At the same time, since the sealer layer is formed at the time of construction, sticking to the wall is easy and adhesion is also improved.By limiting the thickness of the sealer layer,
It is possible to prevent the curing time after application and the wraparound of the resin used in the sealer layer on the back surface of the base material to the front surface of the base material. Also,
By limiting the specific gravity and thickness of the inorganic base material, the cost difference is clearly preferable in comparison with a conventional decorative board using a base material having a high specific gravity and a thickness for preventing warpage. Becomes

[0012]

EXAMPLE A fiber-containing calcium silicate plate having a substrate specific gravity of 0.8 was used as an inorganic substrate, and a moisture-curable urethane sealer (manufactured by Otani Paint Co., Ltd .: “2000-AA”) was used on this surface.
Of 110 g / m ² and a coating viscosity of 11 seconds (manufactured by Sogo Co., Ltd .:
"Zahn cup No. 3"), and then moisture-curable urethane sealer (Otani Paint Co., Ltd.) on the back side:
"2000-AA") 150 g / m ² , coating viscosity 20
Seconds (manufactured by Riaisha Co., Ltd .: “Zahn Cup No. 3”), and dried at room temperature for 30 minutes.

Thereafter, 30 g / m ^{2 of} vinyl acetate emulsion adhesive was applied to the surface, and 30 g of wood grain pattern was applied.
/ M ² thin paper decorative paper is pasted together, 100 ℃, 10kg
/ Cm ² was pressed for 60 seconds for adhesion. On this decorative paper, a thermal polymerization initiator (methyl ethyl ketone peroxide) was added to 1. 0 parts by weight of unsaturated polyester resin.
120 g / m ^{2 of} a resin containing 5 parts by weight was applied, a patterning film was coated on the resin, rolled with a rubber roll, and defoamed.
After curing the unsaturated polyester resin by heating, the patterning film was peeled off to obtain a decorative board of the present invention.

<Comparative Example (No Sealer on Back Side)> Moisture-curing urethane sealer (manufactured by Otani Paint Co., Ltd.): only on the surface of a fiber-containing calcium silicate plate having a substrate specific gravity of 0.8 (same as the example). 2000AA ") at 110 g / m ² and a coating viscosity of 11 seconds (by" Zern Cup No. 3 "manufactured by Koshigo Co., Ltd.) and dried at room temperature for 30 minutes.

Thereafter, 30 g / m ^{2 of a} vinyl acetate emulsion adhesive was applied on the surface, and 30 g of wood grain pattern was applied.
/ M ² thin paper decorative paper is pasted together, 100 ℃, 10kg
/ Cm ² was pressed for 60 seconds for adhesion. On this decorative paper, 120 g / m ^{2 of} a resin containing 1.5 parts by weight of a thermal polymerization initiator (methyl ethyl ketone peroxide) was applied to 100 parts by weight of an unsaturated polyester resin, and a patterning film was coated thereon. After rolling with a rubber roll and defoaming to cure the unsaturated polyester resin, the patterning film was peeled off to obtain a decorative board.

The decorative plates of the above-mentioned Examples and Comparative Examples were placed at 40 ° C.
After leaving it in a 90% atmosphere for 168 hours, the warp of the decorative plate was measured by the measuring method shown in FIG. Table 1 shows the above results.

[0017]

[Table 1]

From the decorative boards of the above Examples and Comparative Examples, FIG.
After cutting a 50 mm square sample as shown in Fig. 4 and leaving it in an atmosphere of 60 ° C for 24 hours, the surrounding area was sealed with a silicon-based sealing agent (Chemedine Co., Ltd .: "Vascoke") to absorb moisture from the surrounding area. Then, it was immersed in normal temperature water for 24 hours. After the immersion, the sample was taken out, the moisture was wiped off, the decorative layer on the surface was peeled off with a knife, and the concrete moisture system (Ket Kagaku Kenkyusho: “HI-50”) was used.
0 ") was used to measure the water content. Table 2 shows the above results.

[0019]

[Table 2]

The remaining sample, which had been cut out, was cut into a 300 mm square, and a double-sided tape (“No.500” manufactured by Nitto Denko Corporation) was stuck on the entire back surface and stuck to a 10 mm thick plywood board. When it was peeled off from the veneer plate after being left at room temperature for 24 hours, the material of the veneer base material was finally destroyed in the examples, but in the comparative example, interfacial peeling easily occurred between the double-sided tape and the sample base material.

[0021]

As described above, according to the present invention, since the sealer layer is formed on the back surface of the substrate, it is possible to reduce the warpage due to the curing shrinkage of the polyester resin layer on the surface, and to reduce the light specific gravity. It is possible to make a decorative board with less warpage even with an inexpensive base material. Further, since the sealer layer is provided on the back surface, it becomes possible to prevent moisture from entering from the back surface of the base material, and the water resistance is improved. At the same time, since the sealer layer is formed during construction, it can be easily attached to the wall and the adhesion is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross-sectional structure of an embodiment of a decorative board of the present invention.

FIG. 2 is an explanatory diagram showing a method for measuring a warp of a decorative board of the present example and a comparative example.

FIG. 3 is an explanatory diagram showing a method for measuring water resistance of the decorative boards of the present example and the comparative example.

[Explanation of symbols]

1 ... Inorganic substrate 2 ... Sealer layer 3 ... Adhesive layer 4 ...
Decorative paper 5 ... Unsaturated polyester resin layer containing a thermal polymerization initiator

Claims (3)

[Claims] 1. A polyester decorative board having a decorative layer containing an unsaturated polyester resin containing a thermal polymerization initiator as a main component on a base material, wherein an inorganic base material is used as the base material, and a sealer layer is provided on the back surface of the base material. A warp-preventing polyester decorative plate characterized by being provided with. 2. The backside sealer layer is 110 to 160 g.
^2. The warp-preventing polyester decorative board according to claim 1, which is / m ² . 3. The warp-preventing polyester decorative board according to claim 1, wherein the inorganic base material has a specific gravity of less than 1.0 and a thickness of 6 mm or less.