JPH11226907A - Decorative veneer and manufacture of decorative plate using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To express a woodgrain with a cubic sense like a summerwood of a natural precious wood by repeatedly adhesively laminating plural times a resin-impregnated sheet having a resin content of a specific range and a resin-impregnated sheet having a specific impregnation rate more than that of the previous sheet in this order to obtain a flitch, and slicing it in a direction intersecting with their laminating surface. SOLUTION: A woody veneer equivalent to a springwood, a low resin-impregnated sheet having a resin content of 30 to less than 70% and a high resin-impregnated sheet having a resin content of 70 to less than 100% are adhesively laminated many times in this order to manufacture a flitch. This flitch is thinly sliced in a direction intersecting with their laminating surface to form an artificial decorative veneer. In this veneer, an opague springwood A, transfer parts B, C, D from the springwood to a summerwood, a summerwood E having a high transparency, and transfer parts F, G, H from the summerwood to the springwood are sequentially arranged in this order in a lateral direction. Thus, a substrate decorative plate base material can be seen through the transfer parts having low transparency and the summerwood having the high transparency. And, a woodgrain similar to a natural precious wood with a steric sense can be really expressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to housing equipment, furniture,
The present invention relates to a decorative board used for building interior materials and the like, and an artificial veneer used for manufacturing the decorative board.

[0002]

2. Description of the Related Art A decorative veneer obtained by thinly slicing a so-called natural precious wood, which is selected from natural woods and has an excellent appearance, has been often used for surface decoration of housing equipment, furniture, building interior materials and the like. Was. Wood that deserves a reputation as a so-called precious wood is characterized not only by its color, but also by the delicate grain pattern formed by annual rings, and the design formed by the combination of color and grain pattern is highly evaluated. is there.

However, in recent years, natural precious wood resources have been depleted, and prices have risen accordingly. Therefore, instead of natural precious wood, relatively inexpensive and large-amount available wood, such as southern timber, has been replaced with a slicer or wood. Thin slices were obtained by rotary lace, bleached or bleached as necessary, and then dyed to resemble a natural precious wood.

However, relatively inexpensive and large quantities of timber, such as southern timber, have large or monotonous grain patterns, or most of them do not have a clear grain. It is far from aesthetic. Therefore, simply dyeing these veneers cannot create a high-quality feel like a natural precious wood. For this reason, recently, artificial veneers obtained by dyeing raw veneers made from these inexpensive wood, laminating and bonding them in the thickness direction to form flitches, and slicing them thinly in the direction intersecting the laminating surface are obtained. Veneer veneers have come into practical use.

That is, a veneer veneer obtained from inexpensive timber such as southern timber is dyed in a color corresponding to the spring lumber of a natural precious wood to be expressed and in a color corresponding to the autumn lumber. This is intended to obtain a wood veneer veneer very similar to a natural veneer veneer by thinly slicing flitches in which laminations are alternately laminated and bonded in a direction intersecting the lamination surface.

[0006] The thickness of the veneer is set with reference to the grain of the natural precious wood to be expressed. In addition, veneers made of raw materials such as Nanyang lumber are usually bleached or dyed before dyeing in order to make the color tone of the natural veneer to be reproduced as close as possible and to keep the color tone of the veneer after dyeing within a certain range. It is common to bleach.

However, for example, a pine grain pattern, which is preferred as a coniferous precious tree, has a color similar to a normal wood color in the spring wood part, but a translucent candy color in the autumn wood part, and The difference in color is obvious. Therefore, even if it is attempted to manufacture an artificial wood veneer veneer by the above-mentioned laminated flitch, the veneer constituting the spring lumber can be obtained relatively easily, but the veneer constituting the autumn lumber must be obtained. Have difficulty.

[0008] There is also a method of using a single plate constituting the autumn material portion which has been made translucent by WPC processing, but the cost is high.

[0009]

SUMMARY OF THE INVENTION The present invention is to solve the above problems by the following method.

[0010]

The present invention has solved the above-mentioned problems by the following method. In other words, in the laminated flitch for artificial wood veneer veneer in the conventional method, instead of the veneer veneer constituting the autumn wood part, it is fluidized by hot pressing at a high temperature of 110 ° C. or more, and the resin molecules are polymerized. An impregnated paper of a thermosetting resin (hereinafter, also simply referred to as a resin) which hardens and becomes transparent is used.

For example, DAP resin impregnated paper is made by impregnating DAP resin into kraft paper and is opaque at normal temperature, but becomes fluid when heated and pressed at a high temperature of 110 ° C. or more, and contains air contained in the resin impregnated paper. Is discharged, and the resin molecules polymerize and cure, and become transparent. The use of a resin that fluidizes, hardens, and becomes transparent at a temperature of 110 ° C. or higher is used when applying a normal wooden veneer or a veneer veneer according to the present invention to a veneer substrate such as a plywood or a fiberboard by hot pressing. This is because most of the adhesives used for curing start curing at a temperature of 100 to 110 ° C. and exhibit adhesive strength. Further, most of these adhesives are apt to be deteriorated by high heat when the temperature is 200 ° C. or higher. Therefore, the operating temperature range is approximately 110 to 200 ° C.

As a suitable resin used for the impregnated paper in the present invention, in addition to the DAP resin, a polyester resin, a melamine resin, and a mixture of two or three kinds of resins selected from the above three kinds of resins. Can be mentioned. There are other suitable resins, but resin price, curing temperature,
The above resins are suitable in consideration of the degree of transparency, hardness after curing, physical properties, and the like. Among them, a mixture of a dap resin and a polyester resin is most suitable as shown in the following examples.

The procedure for obtaining the decorative board of the present invention will be described below. First, a wood veneer corresponding to a spring material portion and a resin-impregnated paper such as a dap resin are alternately laminated and adhered to obtain a flitch. Next, the flitch is sliced in a direction intersecting the lamination surface to obtain a decorative veneer. Then, the decorative veneer is bonded to a wooden decorative board base material such as plywood or fiberboard by hot pressing at 110 to 200 ° C. using a hot press. Then, the opaque resin-impregnated paper becomes transparent, and the base of the decorative board underneath can be seen through, so it is possible to express a transparent or translucent and three-dimensional grain like the autumn wood part of a natural precious tree such as pine. Can be. In addition, when the base material is a wooden base material, the pressure at the time of the heat pressing is the same as that used in the manufacture of a normal wood decorative board.
１５15 kg / cm ² is appropriate. If the pressure is too high, in the case of a wooden substrate, the thickness may be reduced due to heat pressure.

Since the color tone of the decorative board base material is different from the color tone of the natural precious wood to be expressed, if the color tone of the decorative board to which the artificial veneer is applied is different from the color tone of the natural precious wood to be expressed, Coloring is applied appropriately so as to match the color tone of the natural precious wood to express the surface of the decorative board base material. Instead of applying a colored coating to the decorative board substrate, the adhesive used when attaching the decorative veneer may be colored, or both the decorative board substrate and the adhesive may be colored.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The base paper of resin-impregnated paper used in the present invention is most preferably a base paper of unbleached laminate. The reason is not only that the price is low, but also that the resin can be easily impregnated, the transparency when hot pressed is high, and it is easy to express autumn wood color such as pine. Also, its thickness is
A thickness of approximately 0.5 to 2 mm, which is approximately the same as the thickness of the wooden veneer, is appropriate.

The degree of transparency of the resin-impregnated paper can be adjusted by the resin impregnation rate. That is, the higher the resin impregnation rate, the higher the degree of transparency increases, and the lower the resin impregnation rate, the lower the degree of transparency. For normal wood,
There is a transition between the spring wood part and the autumn wood part, which exhibits an intermediate color between the two. Therefore, using a resin impregnated paper with a high impregnation rate,
In addition to expressing the autumn wood part of the wooden veneer veneer, it is also possible to use a resin-impregnated paper with a low impregnation rate to express the transition part existing between the spring wood part and the autumn wood part. By expressing this transition portion, an artificial veneer veneer similar to a natural precious wood can be manufactured more realistically.

That is, a wood veneer corresponding to a spring material portion, a resin-impregnated paper having a low impregnation rate, and a resin-impregnated paper having a high impregnation rate are laminated and bonded many times in this order to produce a flitch. Slice thinly in the direction crossing the plane to obtain an artificial veneer veneer. As shown in FIG. 1, the artificial veneer veneer thus obtained has an opaque spring material portion A, transition portions B, C, and D from the spring material portion to the autumn material portion, a highly transparent autumn material portion E, and an autumn material. The transitions F, G, H from the section to the spring wood section are arranged in this order in the width direction. The transition portion with low transparency and the autumn material portion with high transparency can see through the base material of the base plate, so that a three-dimensional effect can be felt and a grain pattern very similar to a natural precious wood can be realistically expressed.

Further, when producing a resin-impregnated paper, a dye or pigment is added to the resin to be impregnated, and a method of coloring the resin-impregnated paper is appropriately used to produce a decorative veneer very similar to a natural precious wood. It is also possible.

In the present invention, a resin-impregnated paper having a high resin impregnation rate is defined as 70% or more and 100% or more based on the weight of the paper.
The resin-impregnated paper impregnated with a resin having a low resin impregnating rate is a resin impregnated with a resin having a weight of 30% or more and less than 70%. Although it is possible to impregnate the resin with 100% or more, it not only increases the cost,
There is no need to increase the transparency further. When the resin impregnation rate is 30% or less, the resin is hardly transparent even when hot-pressed.

The transition between the spring lumber and the autumn lumber in the natural precious wood gradually approaches the dark autumn lumber color as it approaches the autumn lumber. When it is intended to express the above, as shown in the following examples, it is desirable to form the transition portion using a resin-impregnated paper having a low resin impregnation rate. Further, since the degree of transparency of the resin-impregnated paper can be adjusted by increasing / decreasing the resin-impregnation rate, the color tone of the transition portion is gradually darkened by using two or three types of resin-impregnated paper having the resin impregnation rate stepwise increased. It is possible to approach the color of autumn wood, and it is possible to manufacture a decorative board with a grain pattern similar to a natural precious wood.

A moisture-curable urethane resin adhesive is most suitable as the adhesive used for laminating flitches. Moisture-curable urethane resin adhesive can bond wood with high moisture content and has sufficient water resistance even after bonding,
It is widely used for flitch production of artificial wood veneer using wood veneer.

[0022]

The impregnated paper having a resin impregnation rate of 30% or more becomes transparent or translucent when heated and pressed. Therefore, an artificial decorative veneer obtained by thinly slicing a flitch obtained by alternately laminating and bonding this resin-impregnated paper with a wooden veneer in a direction intersecting the laminated surface is hot-pressed to a decorative plate base such as plywood. When glued together, the transparent or semi-transparent resin-impregnated paper can be seen through the decorative board base material, so that a three-dimensional appearance is felt like a natural precious wood, and it looks very similar to a natural precious wood. A wood-grain decorative board can be manufactured.

Since the degree of transparency can be adjusted by increasing or decreasing the resin impregnation rate, two or three types of resin-impregnated paper having a stepwise higher resin impregnation rate are used in a portion corresponding to a transition part of a natural precious wood. It is also possible to gradually bring the color tone of the transition portion closer to the dark autumn wood color, and it is possible to produce a decorative board having a wood grain pattern very similar to a natural precious wood.

[0024]

[Example] 110 mm in width, 4 m in length, 1 in thickness
mm, 0.15mm, 0.05mm, density 0.34g
/ Cm ³ laminated base paper each 60 sheets, Dap resin 40 parts,
Immersed in a resin solution containing 60 parts of an unsaturated polyester resin, 5 parts of benzoyl peroxide peroxide as a polymerization initiator, and 5 parts of white carbon as a filler, for 1 minute;
Excess resin was squeezed out with a squeezing roll, and the resin impregnation rate was adjusted to 100%, 65%, 50%, and 35%, respectively, and then dried with a hot air drier at 80 ° C. for 15 minutes.

A thickness of 1.0 mm having the same dimensions as the resin-impregnated paper.
Is sliced using a moisture-curable urethane resin adhesive so as to intersect a flitch repeatedly laminated and adhered many times in the order of A to H so as to intersect with the laminating surface to obtain a thickness of 0. A 3 mm artificial veneer veneer was obtained.

A. Gallo-garo veneer, thickness 1.0 mm B. B. Resin impregnated paper thickness 0.15 mm, resin impregnation rate 35% D. Resin-impregnated paper thickness 0.15 mm, resin impregnation rate 50% E. Resin impregnated paper thickness 0.15mm, resin impregnation rate 65% F. Resin impregnated paper thickness 1.0 mm, resin impregnation rate 100% G. Resin impregnated paper thickness 0.05mm, resin impregnation rate 65% Resin impregnated paper thickness 0.05 mm, resin impregnation rate 50% Resin impregnated paper thickness 0.05mm, resin impregnation rate 35%

Subsequently, the artificial veneer veneer was hot-press bonded to a 12 mm-thick plywood with an acrylic resin adhesive using a hot press to obtain a decorative plate shown in the schematic diagram of FIG. The surface of the plywood was previously coated with a colorant prepared by mixing 10% of a pigment of the same color as that of the pine autumn material with an acrylic resin and toning the surface, and coloring.

The veneer on which the artificial veneer veneer is stuck on the surface is
The part of the resin-impregnated paper corresponding to the autumn material part of the pine and the part of the resin-impregnated paper corresponding to the transition part become transparent or translucent through hot pressure by hot pressing, and see through this transparent or translucent layer. The color of the dark colorant applied on the surface of the plywood base material is changed from A corresponding to the spring material to E corresponding to the autumn material,
Since it is seen that the color gradually increases, a three-dimensional effect can be felt like a natural precious pine grain, and a transition portion where the color tone gradually changes is observed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the color tone of a wood veneer according to the present invention.

[Explanation of symbols]

 A Vari-single veneer B Resin-impregnated paper C Resin-impregnated paper D Resin-impregnated paper F Resin-impregnated paper G Resin-impregnated paper H Resin-impregnated paper

Claims (5)

[Claims] 1. A wood veneer, an impregnated paper impregnated with a resin selected from a dap resin, a polyester resin, and a melamine resin, wherein the resin impregnation rate is 30% or more and less than 70%, and a resin impregnation. An artificial veneer veneer obtained by slicing a flitch obtained by repeatedly laminating and bonding a resin-impregnated paper having a ratio of 70% or more and less than 100% in this order a plurality of times in a direction intersecting the lamination surface. 2. The artificial makeup unit according to claim 1, wherein the resin to be impregnated is a mixture of two kinds of resins selected from a dap resin, a polyester resin, and a melamine resin, or a mixture of the above three kinds. Board. 3. Applying an adhesive to the surface of the wooden base material, and bonding the artificial veneer of claim 1 or 2 at a temperature of 110 ° C. or more and 200 ° C. or less by hot pressing. A method for producing a decorative board characterized by the following. 4. An artificial cosmetic veneer according to claim 1 or 2, wherein an adhesive is applied to the surface of the wooden base material, and the veneer is bonded by hot pressing at a temperature of 110 ° C. or more and 200 ° C. or less. A decorative plate characterized by being made. 5. The surface of the wooden base material is colored and painted in the color of the autumn lumber of the natural precious wood, the adhesive is colored in the color of the autumn lumber of the natural precious wood, or the surface of the wooden base material is 5. The decorative board according to claim 4, wherein the decorative board is colored and painted in a fall wood color and the adhesive is colored in a fall wood color of a natural precious wood.