JPH09220799A - Decorative board with transparent film layered on the surface - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve the stain resistance and abrasion resistance of a decorative sheet in which a thermosetting resin-impregnated decorative sheet is integrally layered on the surface of a base material. SOLUTION: A transparent polyethylene terephthalate film is integrally layered on the surface of a thermosetting resin-impregnated decorative sheet layered on the surface of a base material, and this film is used for stain resistance,
It constitutes a decorative plate with improved abrasion resistance.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to water resistance, heat resistance,
The present invention relates to a decorative plate having a transparent film layered on the surface thereof, which has excellent abrasion resistance and exhibits excellent surface cosmetic properties and stain resistance over a long period of time.

[0002]

2. Description of the Related Art Conventionally, a decorative sheet impregnated with a thermosetting resin such as a phenol resin or an unsaturated polyester resin is laminated on the surface of a base material such as a wood material and heat-treated to heat the base material. 2. Description of the Related Art A decorative plate in which curable resin-impregnated decorative sheets are integrally layered is widely known. According to this decorative plate, the thermosetting resin obtained by impregnating and curing the decorative sheet imparts excellent properties such as water resistance, heat resistance, abrasion resistance, and hardness.

[0003]

However, the thermosetting resin-impregnated decorative sheet has a problem that stains due to dyes, foods, etc. are liable to be adhered and the appearance is impaired in a short period of time, and in addition, the hardness is high. Therefore, when a hard object collides, the surface may be cracked. Also, when the thermosetting resin-impregnated decorative sheet laminated on the surface of the base material is hot pressed by a press at the time of manufacturing, the thermosetting resin impregnated in the decorative sheet adheres to the hot plate of the press. Therefore, there is a problem that the work efficiency is lowered.

The present invention has been made in view of the above problems, and the surface of a thermosetting resin-impregnated decorative sheet integrally laminated on the surface of a base material is entirely covered with a transparent film, and heat treatment is performed. An object of the present invention is to provide a decorative board which has both excellent physical properties of a curable resin-impregnated decorative sheet and good surface cosmetic properties and stain resistance for a long period of time.

[0005]

In order to achieve the above object, the present invention employs a transparent film that has been conventionally used as a release paper, and impregnates the transparent film on a substrate with a thermosetting resin. The thermosetting resin-impregnated decorative sheet is layered and integrated on the surface of the base material by superimposing it on the surface of the decorative sheet and applying heat and pressure, and at the same time, a transparent film is layered and integrated on the surface of the thermosetting resin-impregnated decorative sheet. It has a structure formed by the conversion.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION As a base material, a plywood having a certain thickness, a wood board such as a particle board or a hard board, a gypsum board, a calcium silicate board or another inorganic board can be used. On the other hand, as the thermosetting resin-impregnated decorative sheet to be integrally layered on the surface of the base material, a thermosetting resin such as phenol resin, diallyl phthalate resin, unsaturated polyester resin or melamine resin can be obtained as a paper material. One or two types of thermosetting resins are selected according to the application and cosmetic properties of the decorative board, and a sheet-shaped product obtained by impregnating the thermosetting resin is used. An appropriate design pattern is printed on the surface of a decorative sheet made of a paper material impregnated with these thermosetting resins.

The amount of the thermosetting resin impregnated into the decorative sheet varies depending on the material of the base material, but is impregnated within the range of RC (resin impregnation rate for the decorative sheet) = 40 to 70%. That is, when the thermosetting resin-impregnated decorative sheet is placed on the surface of the base material and integrated by heat and pressure treatment, the base material easily absorbs the thermosetting resin liquid from a material such as a wood board or a calcium silicate board. In this case, considering the amount of resin absorbed from the thermosetting resin-impregnated decorative sheet into the base material, increase the impregnation amount within the above range so that the base material does not absorb the thermosetting resin liquid. In the case of using such a laminated body, the impregnation amount of the thermosetting resin is reduced within the above range. The decorative sheet impregnated with the thermosetting resin liquid is dried at a low temperature and is in a so-called B stage state.

On the other hand, as a transparent film integrally laminated on the surface of the thermosetting resin-impregnated decorative sheet, the thickness is
0.02-0.05mm polyethylene terephthalate (PET)
It is preferable to use a film. If it is thinner than 0.02 mm, it is easy to tear and difficult to handle, and if it is thicker than 0.05 mm,
It becomes impossible to obtain a three-dimensional effect by embossing, which will be described later. The PET film is usually not integrated with the thermosetting resin-impregnated decorative sheet. Therefore, the back surface of the film, that is, the surface in contact with the surface of the thermosetting resin-impregnated decorative sheet, is subjected to easy-adhesion treatment such as primer treatment, plasma treatment, or ion treatment to improve the adhesiveness with the thermosetting resin-impregnated decorative sheet. I'll do it.

When the thermosetting resin-impregnated decorative sheet and the transparent film are placed on the surface of the base material in this order, inserted between the upper and lower heating plates of the press and heated and pressed, the decorative sheet is impregnated. When the thermosetting resin is fluidized by heating and then cured, the thermosetting resin-impregnated decorative sheet is adhered and integrated on the surface of the base material, and at the same time, the transparent film is adhered and integrated on the surface of the decorative sheet. A decorative sheet in which a thermosetting resin-impregnated decorative sheet and a transparent film are integrally layered is obtained. At this time, since the transparent film is placed on the surface of the thermosetting resin-impregnated decorative sheet, the transparent film can prevent the thermosetting resin impregnated in the decorative sheet from adhering to the hot plate of the press. Even if it adheres, it can be easily removed.

Further, during the heat and pressure treatment by a press,
When the embossing plate is arranged on the surface of the transparent film, the thermosetting resin impregnated in the decorative sheet is fluidized by heating as described above to soften the decorative sheet, and the decorative sheet has irregularities of the embossing plate. Embossing according to the pattern is performed, and the transparent film is integrally adhered along the embossed pattern surface, so that a decorative plate having a three-dimensional effect can be obtained. If the base material is warped, place a backing material such as backer paper on the back surface of the base material with an adhesive and heat and press it with a press to integrate it. Good. Next, specific examples and comparative examples of the present invention will be described.

[0011]

EXAMPLE As an example, a slag gypsum plate having a thickness of 5 mm is used as a base material, in which straight grooves having a width of 3 mm are provided on the surface at intervals of 100 mm in the width direction and the length direction to form square grooves. The surface of the base material has a resin impregnation rate of 52% and the weight per unit area is 80 g.
/ M ² diallyl phthalate resin-impregnated decorative paper and a plasma-treated polyethylene terephthalate film with a thickness of 0.03 mm are sequentially laminated, and this is pressed by a pressure of 15 kg / cm ^{2 at} a temperature of 135 ° C. for 10 minutes. By hot pressing, a diallyl phthalate resin decorative plate having a polyethylene terephthalate layer integrally laminated on the surface layer was obtained.

As Comparative Example 1, the same base material and the same diallyl phthalate resin-impregnated decorative paper as in the above Example were used,
A release paper made of polypropylene was placed on the surface of this decorative paper and hot pressed by a press under the same conditions as in Example to obtain a diallyl phthalate resin decorative board. As Comparative Example 2,
A decorative board was obtained by coating the surface of the diallyl phthalate resin decorative board obtained in Comparative Example 1 with 30 to 35 g / m ² of inorganic coating material. Further, a commercially available urethane-coated calcium silicate plate having a flat surface is referred to as Comparative Example 3. Urethane paints are said to have excellent adhesion, high coating hardness, and also excellent abrasion resistance, durability, and chemical resistance. As Comparative Example 4, a commercially available UV-coated calcium silicate plate (having an embossed pattern on the coating layer) which has a flat surface and is considered to have higher hardness was used. Comparative Example 5
A commercially available diallyl phthalate resin decorative plate having a flat surface was used as.

The decorative boards of the above Examples and Comparative Examples 1 to 5 were subjected to a stain resistance test and an abrasion resistance test. Table 1 shows the results.
Shown in The stain resistance test was conducted by bringing the pollutant into contact with the decorative plate, heating it at 100 ° C. for 24 hours, washing it, and observing the state of contamination. In addition, the abrasion resistance test uses a Taber type abrasion tester, and the total load applied to the test piece is
The wear state and wear loss at each rotation speed were examined at 500 g. As pollutants, coffee, tea, soy sauce, sauce,
Cooking oil and curry were used. In Table 1, ⊚ means no pollution,
O indicates that slight pollution occurred, Δ indicates that considerable pollution occurred, and X indicates that severe pollution occurred.

[0014]

[Table 1]

As is clear from the above table, in the stain resistance test, the diallyl phthalate decorative boards of Comparative Examples 1 and 5 are superior to the urethane coated board of Comparative Example 3 and Comparative Example 2
It can be said that the decorative plates of Comparative Example 4 and Comparative Example 4 are substantially equivalent. However, the decorative boards of the examples are slightly more contaminated with sauces, curries, etc., but are superior to the other comparative examples, and the contamination resistance effect of the transparent film integrally laminated on the surface is exhibited.

In the abrasion resistance test, the urethane coated plate of Example 3 was the most worn, and in the diallyl phthalate decorative plates of Comparative Examples 1 and 5, 1/2 to 1/3 of the surface decorative layer was 10 to 10.
It disappeared in 0 times. In Comparative Examples 2 and 4, the abrasion resistance was good, but in the Examples, the surface decorative layer remained in a substantially complete state, and even after 200 rotations, the surface cosmetic properties of the comparative decorative plate were completely abolished. It can be understood that the decorative plate of the present example has only 1/3 of it disappeared, which means that the transparent film has excellent abrasion resistance.

[0017]

As described above, according to the decorative board of the present invention,
Since the transparent film is integrally layered on the surface of the base material via the thermosetting resin-impregnated decorative sheet, the decorative surface of the thermosetting resin-impregnated decorative sheet can of course be exposed through this transparent film. Since the transparent film does not easily attach dirt and can be easily wiped off even if it adheres, it has improved stain resistance as compared with a conventional decorative board and exhibits excellent cosmetic properties for a long period of time. Furthermore, the transparent film exhibits good impact absorption, prevents damage, and improves abrasion resistance.

Further, since the transparent film is provided on the surface during the production of the decorative plate, it is possible to prevent the impregnated resin of the decorative sheet from adhering to the hot platen when the pressure is applied by the press, and the mold release material. Etc. are not required and the production efficiency is improved. Moreover, it is not necessary to apply coating etc. on the surface to improve the performance, and the stain resistance, abrasion resistance, and makeup resistance can be obtained only by hot pressing. It is possible to obtain a decorative board having excellent properties.

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Claims (4)

[Claims] 1. A thermosetting resin-impregnated decorative sheet and a transparent film are sequentially laminated on a surface of a base material, and are integrally layered by heating and pressing, and a transparent film is layered on the surface. Made veneer. 2. The surface of claim 1 wherein the thermosetting resin impregnated into the decorative sheet is one or two of phenol resin, diallyl phthalate, unsaturated polyester resin and melamine resin. A decorative board with layers of film. 3. The decorative plate having a transparent film layered on the surface thereof according to claim 1, wherein the transparent film is a polyethylene terephthalate film having a thickness of 0.02 to 0.05 mm. 4. The transparent film on the surface according to claim 1 or 3, wherein the back surface of the transparent film is subjected to an easy-adhesion treatment by any of a primer treatment, a plasma treatment and an ion treatment. Layered veneer.