JPH03246006A - Manufacture of woody decorative laminated sheet - Google Patents

Abstract

PURPOSE:To enhance the stability in size, water resistance and hardness of the title decorative laminated sheet by slicing an assembled flitch to form a sliced veneer and curing resin, which has been semicured, when the sliced veneer is allowed to adhere to a base sheet such as a plywood. CONSTITUTION:After wood flakes 1 produced by slicing wood have been subjected to a chemical treatment, they are dried, and an adhesive is then applied to the wood flakes 1 which are subsequently compressed and formed into a flitch 2 by a pressing device 7. The flitch 2 is impregnated with resin for a WPC treatment, and the resin is semicured. Then, a plurality of flitches 2 are assembled and, after the assembled flitch 3 is formed, it is sliced to be formed into a sliced veneer 4. Furthermore, the sliced veneer 4 is allowed to adhere to a base sheet 5 such as a plywood, and the resin in the sliced veneer 4 is cured, whereby a woody decorative laminated sheet 6 is obtained. The woody decorative laminated sheet thus obtained has good stability in size, good resistance to water and high surface hardness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a decorative wooden board having an appearance made of assembled wood flakes.

[Conventional technology 1] In recent years, with the diversification of building materials, there has been a demand for materials with a highly novel appearance, especially the warmth of wood.
There is a need for wood decorative boards that have an appearance that does not compromise on elegance and can also be adapted to modern living spaces. In response to such requests, the applicant for this patent previously published the patent application in 1986-55.
No. 204 M1 was filed for the disclosure. In such a conventional example, a flitch is formed by applying adhesive to a thin piece of wood and molding it with a pressure II bottom, then slicing the flitch to form a sliced veneer, and gluing the sliced veneer to a board such as plywood to create a wood material. It forms a decorative board.

[Problem to be Solved by the Invention 1] By the way, the following table shows a comparison of the dimensional stability of the above-mentioned conventional material and natural wood.

In the case of the conventional example, there is a problem that although the difference in dimension between the length direction and the width direction is reduced compared to natural wood, the absolute value is still large. Although its water absorption rate is somewhat better than that of natural wood, there are problems when using it in areas that require water resistance. Furthermore, there is a problem that the surface does not have hardness.

The present invention has been made in view of the above points, and the object of the present invention is to provide a method for manufacturing a wood decorative board whose surface is treated with WPC and has dimensional stability, water injection properties, and hardness. It is on offer.

[Means for Solving the Problems] The method for manufacturing a wood decorative board of the present invention involves applying an adhesive to a thin piece of wood 1 and forming it into a block by pressure molding to form a flitch 2. After semi-curing by impregnating with resin, a plurality of flitches 2 with different colors etc. are combined in a pattern, and a plurality of flitches 2 are integrated into a composite flitch 3 to form a composite flitch 3, and the composite flitch 3 is sliced into slices. After forming the veneer 4,
When the sliced veneer 4 is bonded to the substrate 5 such as plywood, and the semi-cured resin is cured at the time of bonding, this is referred to as a Vf characteristic.

[Action 1: By impregnating resin, semi-curing, and curing the sliced veneer 4, the WPC processing method J! ! ! It is possible to obtain products with dimensional stability, water injection properties, and surface hardness. Further, by assembling a plurality of flitches 2 to form a flitch assembly 3 and slicing the flitch assembly 3, a flitch having a checkerboard-like pattern on the surface can be obtained.

[Example] As shown in FIG. 1, a thin piece of wood 1 obtained by slicing wood is first treated with a chemical, then dried, an adhesive is applied to the thin piece of wood 1, and then the thin piece of wood 1 is processed using a press device 7.
is press-molded to form a flitch 2, the flitch 2 is impregnated with a resin for WPC treatment and semi-cured, and then a plurality of 79 pieces 2 are assembled to form an assembled flitch 3.
is formed, the flitch assembly 3 is sliced to form a sliced veneer 4, and the sliced veneer 4 is adhered to a substrate 5 such as plywood, and the resin of the sliced veneer 4 is hardened to form a wood decorative board 6. is obtained. Wood slice 1 has a thickness of 0
．． 05-0.80III (preferably 0.10-0.
50-1), and the area is 6 to 40012 (preferably 25
~250mm2) with an aspect ratio (height@/width) of 0.4~
7.0 (preferably 0.8 to 3.0). These wood thin pieces 1 may be rounded, and as long as the above-mentioned shape is 60% or more, dimensions other than the above-mentioned dimensions may be included.

Chemical treatments include dyeing treatments, insect repellent treatments, antiseptic treatments, and flame retardant treatments. The dyeing process is carried out, for example, by immersing the inner IL 10 containing the wood slices 1 in a dyeing liquid 9 in a dyeing tank 8, as shown in FIG. The adhesive is applied to the wood slice 1 by spraying or by cross-wiring. The type of adhesive is not particularly limited as long as it has a hardness that allows slicing after bonding, but the following adhesives are considered to be appropriate.For example, urethane adhesive, urethane emulsion adhesive, soft (elongation rate 40%) (above) polyester resins, vinyl acetate adhesives, etc. Pressure forming of the thin wood piece 1 coated with adhesive is carried out in a press device 7, and as shown in FIG. Ru.

The pressure applied by the press device 7 is sufficient to crush the wood flakes 1 along the press surface, and is 2K g/a.
m2-50 K g/am2 (preferably 7 K g
/ am'' ~ 14 Kg/c so 2), the flitch 2 formed by pressing with the single press device 7 is impregnated with a resin for WPC processing and semi-cured. Examples of the resin include melamine resin. Impregnation with this resin is performed under reduced pressure and pressure. An example of the state of reduced pressure and pressure at this time is shown in a graph as shown in Figure 2, and the symbol a in Figure 2 is The section indicated by is the section where the resin is added. Semi-curing is carried out using a high-frequency dryer, etc. In this way, a plurality of flitches 2 impregnated with resin for WPC processing are collected and assembled into an integrated flitch. A plurality of flitches 2 are prepared, for example, dyed in different colors, and the plurality of flitches 2 are arranged in a checkerboard-like pattern and integrated. A sliced veneer 4 is formed by slicing with a scissor blade. This sliced veneer 4 is glued onto a substrate 5 such as plywood to form a wood decorative board 6. When pasting the sliced veneer 4, it is heated and the resin for WPC treatment is cured.

The heating temperature at this time is about 120 to 140°C.

The surface of the wooden decorative board 6 configured as described above is coated with a paint such as urethane paint, if necessary. Incidentally, in the present invention, the reason why the WPC% embedding resin is impregnated at the flitch stage 2 is as follows. Conventional WPC
Normally, processing is carried out at the stage of slicing the veneer, but if this is done, the dimensions will vary due to resin impregnation, drying, etc., making it extremely difficult to handle items that require dimensional accuracy, such as the Ichimatsu Yokosama pattern. Therefore, the method of the present invention was adopted.

Do as above! ! The wood decorative board left behind can be used, for example, as flooring material.

[Effects of the Invention] Since the present invention is carried out as described above, it is possible to obtain a wooden decorative board whose surface appearance is made of thin wood flakes without detracting from the quality of the wood, and which has an appearance that can be adapted to modern living spaces. Of course,
The sliced veneer on the front side is treated with WPC to provide good dimensional stability and water resistance, and a wood decorative board with surface hardness.Furthermore, the composite flitch, which is an assembly of multiple flitches, is sliced. Therefore, it is possible to obtain wood decorative boards with various patterned appearances.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the manufacturing process of an embodiment of the present invention.
Figure @2 is a graph explaining the state of vacuum and pressurization impregnation of the same resin as above, where 1 is a wood thin piece, 2 is a 7-7 piece, 3 is a composite flitch, 4 is a sliced veneer, and 5 is a substrate. .

Claims (1)

[Claims] [1] A flitch is formed by applying adhesive to a thin piece of wood and forming it into a block by pressure molding. After semi-curing this flitch by impregnating it with a resin for WPC treatment, multiple flitches with different colors etc. are formed. combining them in a pattern and integrating a plurality of flitches to form a composite flitch; slicing the composite flitch to form a sliced veneer;
Thereafter, the sliced veneer is bonded to a substrate such as plywood, and the semi-cured resin is cured during bonding.