JPS58131174A - Production of decorative plate excellent in wear resistance - Google Patents

Abstract

PURPOSE:To produce a decorative plate excellent in wear resistance, by undercoating the decorative surface of a decorative plywood with paint in which the limited amount of mineral power is mixed, and then topcoating said surface with paint in which the mineral powder is not mixed. CONSTITUTION:The decorative surface of a decorative plate material 3 is undercoated 2 with paint in which 1-4wt% pref. 1.5-3.5%, mineral powder such as green carbon, aluminium carbide or diamond is mixed. When the undercoat paint layer 2 where the mineral powder 1 floats on its surface is under a condition set to touch, the surface is topcoated 4 with paint not-contg. mineral powder to form a protective coating film on the decorative surface. In this way, the decorative plate having a surface paint film having sufficient transparency and excellent wear-resistance is obtained. Phenol resin paint or the like may be used as said paint, and its application amount as each of the topcoat and the undercoat is at about 20-150g/m<2>, respectively. The particle size of the mineral powder is preferably at about 20-80mu.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing decorative laminate materials with improved wear resistance.

Lay the paint mixed with mineral powder on the surface of the makeup and shrine.
It has been known for a long time to improve wear resistance by adding mineral powder, but it has not been possible to obtain a desirable product because it is difficult to set the amount of mineral powder mixed in. That is, when the amount of mineral powder required to obtain desired wear resistance is mixed, the transparency of the decorative surface coating is reduced, and the surface cosmetic properties are reduced, such as the wood grain pattern becoming blurred. On the other hand, if the mixing amount is reduced in order to maintain the desired transparency, the abrasion resistance will decrease, which is a trade-off.

In view of the above circumstances, the inventors of the present invention have conducted intensive research to develop green carbon and aluminum carbide.

A paint containing 1 to 4 coats of mineral powder such as diamond, preferably 1.5 to 3.5% by weight, is applied to the board surface, and then a top coat is applied with a normal paint containing no mineral powder. As a result, we succeeded in obtaining a decorative board material whose surface coating film has sufficient transparency and favorable abrasion resistance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

What is shown in FIG. 1 is a state in which a slope 2 mixed with an appropriate amount of mineral powder 1 is applied to the surface of a decorative board material 3 and dried and hardened. As is clear from this figure, when the coating film is cured, the 10 particles of mineral powder are in a suspended state in the coating material 2F. When we conducted a surface abrasion test using the JAS Abrasion B test on the decorative board in this condition, we found that there were ores protruding from the surface! l! The i21 particles peeled off from the coating midway through the process, resulting in a value of 7 that was lower than expected. From this, it has been found that sufficient wear resistance can be obtained even with a small amount of mixing by taking steps to prevent the mineral particles from peeling off during use.

The one shown in Figure 2 is one in which 1 part of mineral powder is mixed with 1 part of mineral powder.
- On top of the coating y2, a top coat 4 is further applied with a paint containing no mineral powder. By doing this,
In the one shown in FIG. 1, the mineral particles 1 protruding from the surface are covered with a -F coating film 4 to prevent them from peeling off during use.

The results shown in Figure 5 are the results of measuring the abrasion resistance (1) and transparency (a) of the product obtained by varying the amount of mineral powder mixed in jt (x) in the product shown in Figure 2. This is a graph. In more detail, green carbon powder is mixed into a polyurethane resin paint, and then applied to the surface of the decorative board using a roll coder. 4 of the obtained product.
JAS abrasion B test was used to check the quality of the tag, and JISK was used to check the transparency.
6111 was determined by the 5400 hiding power test.

As is clear from this graph, the abrasion resistance is 500 revolutions with a mixed amount of 1% by weight, showing a high value of 1100 revolutions or more from 1.5% by weight, and the transparency is high from 6.5% by weight. It rapidly decreased to 6° at 4% by weight. Therefore, if the amount of mixture is between 1 and 4, the wear resistance will be more than 500 rotations and the transparency will be more than 6 degrees, and furthermore, the amount of mixture will be 1.5 to 3.5.
In terms of vehicle volume, wear resistance is 1100 rpm or more, transparent IA
It is possible to obtain extremely high values of k80 or higher. This was also the case when aluminum carbide mineral powder was used.

The paints include phenolic resin pigments, algide resin paints, amino alkyd resin paints, vinyl resin paints, chlorinated rubber paints, epoxy resin paints, thermosetting acrylic resin paints,
Unsaturated 11th polyester resin paint, polyurethane resin paint, silicone resin paint, etc. can be used, and the top coat and undercoat paints may be the same or different. The coating amount is preferably 20 to 150 g/door for the undercoat and 20 to 150 ji/rrl for the top coat, and the particle size of the mineral powder is preferably 20 to 80 μm.

Further, it is preferable that the top coat is applied when the base coat containing the mineral powder is dry to the touch. This is because if a top coat is applied after complete curing, there is a risk of poor adhesion between the upper and lower layers.

Examples of the present invention will be described below.

Example 1 Polyurethane resin paint 1100N: parts, particle size 70-8
After stirring and mixing 3m-M parts of 0μ green carbon, it was applied at a rate of 60g/- to the surface of a decorative board made by gluing a sliced veneer on a 12mm thick plywood.
After applying an undercoat with AIIQ-Lucoda and drying it at 60°C for 60 minutes to make it dry to the touch, apply 100 fl/n of polyurethane resin paint.
? Top coated with a flow coder at a ratio of 10% at 60°C.
It was dried for 0 minutes to form a surface endotherm. The abrasion resistance of the obtained decorative board was 1,300,300 rotations and 85.

Example 2 Polyurethane resin paint 100'Mi part, particle size 70-8
A surface coating was formed in the same manner as in Example 1, except that a mixture of 1 part of 0μ alumina carbide 2i was used as an undercoat. The abrasion resistance of the obtained decorative board material was 90 at 1200200 rotations.

Example 3 Amino alkyd resin paint 100 parts by weight, particle size 40~
A surface coating was formed in the same manner as in Example 1, except that 1.5 parts by weight of 50μ green carbon was stirred and mixed and an undercoat was applied, and an amino alkyd resin paint was applied as an overcoat. The abrasion resistance of the obtained decorative board material is 1100 rotations, and the transparency is 95.
Met.

As described above, according to the method of the present invention, the resistance to 11 JV is...
6- It is possible to obtain a decorative board system with excellent surface cosmetic properties.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a decorative board material subjected to surface board removal by the conventional method, Fig. 2 is an explanatory diagram of a decorative board material subjected to surface board cutting by the method of the present invention, and Fig. 6 is an explanatory diagram of a decorative board material subjected to surface board cutting by the conventional method.
1 is a graph showing the relationship between the mixed lid, abrasion resistance, and transparency of /lJ quality powder. 1... Mineral particles, 2... Undercoat paint, 6... Makeup coating, 4... Top coat paint. Patent applicant Sadashige Special Plywood Industry Co., Ltd. 7- Figure 1 Figure 2 2 Y Figure 3 12345% by weight

Claims (1)

[Scope of Claims] 1) A paint in which mineral powder such as green carbon, aluminum carbide, and diamond is mixed in 1 to 4 layers, preferably 1.5 to 6.5% by weight, on the decorative surface of decorative plywood. Applying an undercoat and then applying a topcoat with a paint that does not contain mineral powder to form a decorative protective coating;
A method for manufacturing decorative board materials with excellent wear resistance. 2) The method for producing a decorative board material with excellent wear resistance according to claim 1, wherein the top coat is applied when the undercoat film is dry to the touch.