JPH071405A - Decorative plate and manufacture thereof - Google Patents

Abstract

PURPOSE:To reduce the cost and to improve the strength of a decorative veneer by using a simple unit in a method for manufacturing a decorative plate adhered with the veneer. CONSTITUTION:A method for manufacturing a decorative plate comprises the steps of coating a surface of a decorative veneer 1 with thermosetting synthetic resin (p), then heating to press it between pressing plates to impregnate and cure the veneer 1 with part of the resin (p), then forming an impregnated part 3, thereafter so laminating an unimpregnated part of the veneer 1 on a surface of a board 4 as to be brought into contact with the board 4 through adhesive (c), then heating to press it between the pressing plates to impregnate the unimpregnated part of the veneer with the adhesive (c), and curing and adhering it.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a decorative board having a hard surface impregnated with a synthetic resin.

[0002]

[Prior Art and its Problems] Conventionally, a decorative veneer is pressed,
The synthetic resin is put into a depressurizing device and injected into the decorative veneer to impregnate the synthetic resin, and then cured to obtain a resin-impregnated decorative veneer. Then, the resin-impregnated decorative veneer thus obtained was attached to a substrate via an adhesive to form a decorative plate. The entire decorative veneer was impregnated with synthetic resin, and the decorative veneer itself had a high hardness, and the performance (wear resistance, day cracking resistance, etc.) of the decorative veneer could be improved.

However, since the pressurizing and depressurizing devices are used, large-scale equipment is required, and the productivity remains low. Further, since the entire decorative veneer is impregnated with the synthetic resin, the amount of the synthetic resin used is large and the cost is high.

Further, since the synthetic resin is left on the surface, the adhesive does not penetrate into the decorative veneer at the time of bonding to the substrate,
Anchor effect cannot be expected and adhesive force cannot be obtained. Therefore, the adhesive force associated with the intermolecular attractive force must be strongly required, and it becomes necessary to use a synthetic resin adhesive of the same type as the synthetic resin used for the impregnation, which has been a cause of increasing the cost.

[0005]

[PROBLEMS TO BE SOLVED] To improve the strength of a decorative veneer at low cost by using a simple device in a method for manufacturing a decorative veneer to which a decorative veneer is attached.

[0006]

[Technical Means] A decorative plate provided with a decorative veneer 1 in which an impregnated portion 3 impregnated with a thermosetting synthetic resin p and an adhesive impregnated portion 6 impregnated with an adhesive c are formed on a surface of a substrate 4. And its manufacturing method.

[0007]

[Description of Configuration] 1 is a decorative veneer, such as a slice veneer, a sawn veneer, a rotary veneer, a half-land veneer, an artificial wood veneer, etc., having a thickness of 0.1 to 2.0 mm. Is used.

A sheet-like material such as a non-woven fabric, algae paper, or kraft paper, which does not prevent press-fitting and impregnation of the adhesive 5, may be attached to the back surface of the decorative veneer 1.

Thermosetting synthetic resin p is applied to the surface of the decorative veneer 1 by using a coating device (roll coater, flow coater, curtain coater, spreader, etc.). The thermosetting synthetic resin p is a phenol resin, a urea resin, a melamine resin, a phenol resin, an acrylic resin, a polyester resin, a polyurethane resin, an isocyanate or the like, and a thermosetting synthetic resin obtained by singly or arbitrarily modifying them is used.

The coating amount of the thermosetting synthetic resin p is 30 to 15
It is preferably 0 g / m ² and its viscosity is 0.2 to 3.0 poise.

If the coating amount is 30 g / m ² or less and the viscosity is 0.2 poise or less, the thermosetting synthetic resin is impregnated into the decorative veneer 1 but is not uniformly applied to the surface layer and the surface hardness is I cannot measure improvement.

The coating amount of the thermosetting synthetic resin p is 150 g /
Even if m ² or more and the viscosity is 3.0 poise or more, the surface hardness can be improved if the thermosetting synthetic resin p is uniformly applied to the surface layer. And, although the performance is the same as when the coating amount is 30 to 150 g / m ² , it causes a high cost.

Further, if the viscosity is high, there is a problem that the decorative veneer 1 cannot be pressed and impregnated uniformly. Further, during pressing, the thermosetting synthetic resin p may be squeezed out, and the decorative veneer 1 or equipment may be contaminated.

Next, the decorative veneer 1 coated with the thermosetting synthetic resin p is heated and pressed between the upper and lower pressing machines by using a flat plate pressing machine to press-fit and impregnate the thermosetting synthetic resin p with heat. The curable synthetic resin p is cured to form the thermosetting synthetic resin coating layer 2 on the surface layer. Thus, the impregnated portion 3 in which the thermosetting synthetic resin p is impregnated is formed on the surface of the decorative veneer 1.

Next, the surface of the substrate 4 is subjected to a surface treatment such as a sealing treatment, a sealer treatment, and a polishing treatment, if necessary, and then a coating device (roll coater, flow coater, curtain coater, spreader, sprayer, etc.). To apply the adhesive c.

The substrate 4 includes plywood, fiber board (hard fiber board, medium fiber board, etc.), wood chip board (particle board, flake board, strand board, OSB etc.), inorganic board (calcium silicate board, cement board, Slag cement board, gypsum board, etc.) is used.

The adhesive c is a vinyl acetate resin, a urea resin, a melamine resin, a phenol resin, an acrylic resin, a polyurethane resin, an isocyanate, a synthetic resin such as SBR or MBR, or a rubber-based adhesive, which may be used alone or optionally modified. The used adhesive is used.

The amount of adhesive c applied is 50 to 150 g / m ²
However, the viscosity is preferably 100 to 300 poise.
The coating amount is 150 g / m ² or more, and the viscosity is 100.
If it is less than or equal to poise, an excessive amount of coating is applied, and the adhesive c will squeeze out at the time of pressing, and the decorative board or equipment will be contaminated.

If the same type of decorative veneer 1 as the thermosetting synthetic resin of the decorative veneer is used on the surface of the substrate 4 coated with the adhesive c, the anchoring effect and the intermolecular attractive force are sufficiently exerted. Adhesive strength is obtained. The amount of adhesive c applied is 50 g /
If it is m ² or less or the viscosity is 300 poise or more, it is difficult to press-fit and impregnate the decorative veneer 1 and the adhesive force due to the anchoring effect cannot be expected.

Next, the surface of the substrate 4 coated with the adhesive c is laminated so that the non-impregnated portion of the decorative veneer 1 which is not impregnated with the thermosetting synthetic resin is in contact with the substrate. Next, by pressing the substrate 4 and the decorative veneer 1 between the pressing plates, the adhesive c is impregnated in the non-impregnated part of the thermosetting synthetic resin of the decorative veneer 1 and the decorative veneer 1 is attached to the substrate 4 The adhesive impregnated portion 6 is formed on the decorative veneer 1. In the present invention, since the impregnated layer 3 of the thermosetting synthetic resin p is formed on the decorative veneer 1, the adhesive c is prevented from seeping out onto the surface of the decorative veneer 1.

The decorative veneer 1 and the decorative veneer in which the surface of the substrate 4 is thus formed with the impregnated portion 3 impregnated with the thermosetting synthetic resin p and the adhesive impregnated portion 6 impregnated with the adhesive c. A decorative board having a thermosetting synthetic resin coating layer 2 on one surface was obtained. Although the adhesive layer 5 appears in the drawing, it almost disappears as a decorative plate.

Further, a colored transparent paint may be applied to the surface of the obtained decorative plate to form a colored film. Further, a colorant may be mixed with either or both of the thermosetting synthetic resin and the adhesive.

[0023]

The decorative veneer 1 stuck to the substrate 4 is press-impregnated with a part of the adhesive c from the back side, and the thermosetting synthetic resin layer 2 is formed on the surface side by coating. At the same time, since a part of the thermosetting synthetic resin 2 was press-fitted and impregnated, the decorative veneer 1 itself was impregnated with resin, and the surface hardness could be improved and the dimension could be stabilized. Further, also in the manufacturing method thereof, a simple coating device and a pressing device can be easily and without waste.

[Brief description of drawings]

FIG. 1 is a sectional view of a decorative board of the present invention,

[Explanation of symbols]

1: Veneered veneer, 2: Thermosetting synthetic resin coating layer, 3: Thermosetting synthetic resin impregnation part, 4: Substrate, 5: Adhesive layer, 6: Adhesive impregnation part, c: Adhesive, p : Thermosetting synthetic resin.

Claims (2)

[Claims] 1. A decorative board, characterized in that a decorative veneer having an impregnated portion impregnated with a thermosetting synthetic resin and an adhesive impregnated portion impregnated with an adhesive is provided on a surface of a substrate. 2. The surface of the decorative veneer is coated with a thermosetting synthetic resin, and then heat-pressed between the pressing plates to impregnate and cure a part of the thermosetting synthetic resin into the decorative veneer. After forming the part, the non-impregnated part of the decorative veneer is laminated on the surface of the substrate with an adhesive so that the part is in contact with the substrate. A method of manufacturing a decorative board, which comprises impregnating an impregnated portion with an adhesive, and curing and adhering.