JP2692926B2 - Method of manufacturing wood veneer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a wooden decorative veneer formed by slicing a flitch formed by pressure-molding a large number of pieces of wood with an adhesive. It is a thing.

[Prior Art] In recent years, with the diversification of building materials, a material with a highly novel appearance is required. In particular, there is a need for a veneered veneer that retains the warmth and tenderness of wood and has an appearance that can be used in a modern living space. In order to meet this requirement, the applicant of the present patent has previously filed Japanese Patent Application No. 62-2117.
I applied for the one disclosed in No. 56. Such a product is manufactured by applying an adhesive to a thin piece of wood, forming a flitch by forming a block by compression molding, and slicing the flitch.

[Problems to be Solved by the Invention] Although the wood decorative veneer manufactured as described above is very soft and highly flexible, there is a problem in that the strength of the veneer itself is insufficient.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a method for manufacturing a wooden decorative veneer that can increase the strength of the veneer itself and has a soft feel. Another object of the present invention is to provide a method of manufacturing a wood decorative veneer capable of increasing the strength without using a wet color.

[Means for Solving the Problems] In order to achieve the above object, the method for manufacturing a wood decorative veneer of the present invention is as follows: a thin wood piece 1 made of a urethane adhesive, a urethane emulsion adhesive, a soft (elongation 40% or more) polyester resin, An adhesive selected from vinyl acetate-based adhesives is applied, and blocks are formed by compression molding to form a flitch 2. At the same time, the flitch 2 is sliced to form a sliced veneer 3, and the sliced veneer 3 is subjected to WPC. It is characterized by processing. It is also preferable that the sliced veneer 3 is subjected to foaming WPC treatment.

[Operation] For sliced veneer 3 formed by slicing flitch 2
By applying WPC treatment, it is possible to obtain a wood decorative veneer with enhanced strength and a soft feel. Also foam WP
It is possible to obtain a wood decorative veneer that has been strengthened so that it does not become wet color by the C treatment.

Example A wood slice 1 obtained by slicing wood as shown in FIG. 1 is first chemically treated, then dried, and then the wood slice 1
Is squeezed to form a flitch 2, and the slicing blade 4 slices the flitch 2 to form a sliced veneer 3
The sliced veneer is subjected to WPC treatment to form a wood decorative veneer. The thin wood piece 1 has a thickness t of 0.05 to 0.80 mm (desirably 0.10 to 0.50 mm) as shown in FIG.
The area is 6 to 400 mm ² (desirably 25 to 250 mm ² ) and the aspect ratio (height a / b) is 0.4 to 7.0 (desirably 0.8 to 3.0). These wood thin pieces 1 may be rounded.
Further, if the above-mentioned shape is 60% or more, it may be mixed with other dimensions. Dyeing treatment for chemical treatment,
There are insect repellent treatment, antiseptic treatment, flame retardant treatment and the like. The dyeing process is performed, for example, by immersing the inner basket 8 containing the thin wood pieces 1 in the dyeing solution 7 in the dyeing tank 6 as shown in FIG. Wood flakes 1
The application of the adhesive to is performed by spraying or kneading. The type of adhesive is not particularly limited as long as it can be sliced after bonding, but the following adhesives are suitable. For example, there are a urethane adhesive, a urethane emulsion adhesive, a soft (elongation rate of 40% or more) polyester resin, and a vinyl acetate adhesive. Wood flakes coated with adhesive 1
Although the press-molding is carried out by the press machine 9, as shown in FIG. 1, the wood thin piece 1 is put into the container 10 and pressed by the press board 11. The pressure applied by the pressing device 9 is sufficient to crush the thin wood piece 1 along the pressing surface, and is ² Kg / cm ^{2 to} 25 Kg / cm ² (desirably 7
^{Kg / cm 2 ~14Kg / cm 2} ) it is. The flitch 2 formed by pressing with the pressing device 9 is sliced into sliced veneer 3
Are formed, and WPC treatment is performed as follows to form a wood decorative veneer. First, the sliced veneer 3 is dried, and this sliced veneer 3 is put into a processing pot and decompressed. Then, a resin such as polyester, acrylic, melamine, etc. is injected, pressurized, and then taken out from the processing pot. After taking out from the processing kettle, squeezing press is performed and it is semi-cured by drying. This semi-cured sliced veneer 3 is adhered to a substrate 12 such as plywood with an adhesive, and the above injected resin is cured while adhering. In this way, a wood decorative veneer reinforced by WPC treatment is obtained. Since the sliced veneer 3 does not have directivity or grain unlike ordinary wood, cracks are less likely to occur from the semi-cure to the pasting.

When WPC treatment is performed as described above, the wooden decorative veneer becomes a wet color, but when strengthening without making it a wet color, foamed WPC
Do the processing. The foamed WPC treatment is basically the same as the above WPC treatment, but a foamable resin is used as the injected resin. In this case, the semi-curing step is omitted.

Next, a specific example of the method for producing a wood decorative veneer of the present invention will be introduced.

(Specific example 1) As a thin piece of wood 1, pine tree was finely sliced to obtain a thickness of 0.10 to 0.40 mm, an area of 12 to ²⁰⁰ mm2, and an aspect ratio of 1.0.
Use a main component (80% or more) with a size of ~ 3.0. This wood flakes 1 are dyed to obtain a dye (Suminol)
Milling Brawn 3G Immersed in Sumitomo Chemical Co., Ltd. 0.1%) for 10 seconds and then dried. Insect repellent (Pendine Mitsui Toatsu Chemicals 2%) soaked for 10 seconds and dried. TIG Made by Keshholtz 1
%) Soak for 10 seconds in it and dry it. Flame retardant treatment agent (Nonen W-2-50 Maruzen Yuka Kogyo 40%)
It was dipped in 10 seconds and dried. An adhesive was applied to the wood flakes 1 by adding 70 g of a urethane adhesive (GA601-01 manufactured by Sumitomo Bakelite Co., Ltd.) to 100 g of the wood flakes 1 thus treated and kneading. Next, this wood thin piece 1 was pressed at a pressure of 10 kg / cm ² for 1 hour to prepare a flitch 2, and this flitch 2 was sliced to a thickness of 0.50 mm to obtain a sliced veneer 3.

This sliced veneer 3 was WPC processed as follows. Dry sliced veneer 3 to a water content of 6% or less, put it in a treatment kettle, depressurize at 10 mmHg for 2 hours, inject the resin for WPC with the following composition, and apply it at a pressure of 18 Kg / cm ² for 1 hour. Pressed.

After pressurizing, take it out of the processing pot, squeeze press it at a pressure of 6 kg / cm ² for 5 minutes, and semi-cure for 10 minutes at 120 ° C.
Paste the slice veneer 3 which is Semikyua plywood as, 145 ° C. at bonding press bonded under pressure for 3 minutes under the conditions of 8 Kg / cm ^2, and allowed to cure. In this way, a wood veneer reinforced by WPC treatment was obtained.

(Specific Example 2) The above is the same as that of Specific Example 1 until the sliced veneer 3 is formed and the sliced veneer 3 is dried. After drying, the WPC treatment is performed as follows. Put the dried sliced veneer into the processing kettle, depressurize at 4 mmHg for 2 hours, inject T-833 (manufactured by Sanken Kako) as a resin for foaming WPC, pressurize at 18 Kg / cm ² for 1 hour, and 6 Kg / cm ^2. Substrate 1 after squeezing and pressing at a pressure of cm ² for 5 minutes
Attach the above sliced veneer 3 to the plywood as 2 and put it at 135 ℃, 8K
Pressure was applied for 8 minutes under the condition of g / cm ² to bond and cure. In this way, a wood decorative veneer that was strengthened by foaming WPC treatment and that did not become wet color was obtained.

[Effect of the invention] As described above, the present invention applies an adhesive selected from urethane adhesives, urethane emulsion adhesives, soft (elongation 40% or more) polyester resin, and vinyl acetate adhesives to wood flakes and presses them. Since it is formed into blocks by molding to form flitch, and this flitch is sliced to form a sliced veneer, it is possible to obtain a veneered veneer that has a woody appearance and is compatible with modern living spaces. As a matter of course, since the sliced veneer is subjected to WPC treatment, the sliced veneer having flexibility is strengthened to obtain a wood veneer with high strength. In other words, WPC is made into sliced veneer obtained by slicing a flitch obtained by solidifying wood flakes with an adhesive selected from urethane adhesive, urethane emulsion adhesive, soft (40% or more elongation) polyester resin, and vinyl acetate adhesive. By applying the treatment, while maintaining the flexibility to some extent, which is a good point of the sliced veneer obtained by slicing the flitch, which is obtained by solidifying the wood veneer with an adhesive, its strength (each piece of the wood veneer that constitutes the sliced veneer itself It is possible to obtain a wood-made decorative veneer that is hard to be cracked or scratched as a whole, has strength, and has a soft feeling. Further, in the invention according to claim 2 of the present invention, since the sliced veneer is subjected to the foamed WPC treatment, it is possible to obtain a wood-made decorative veneer that does not become wet color while strengthening, and a wide range of interior materials, etc. It is possible to obtain a wooden veneer that can be used as.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a manufacturing process of one embodiment of the present invention, and FIG. 2 is an enlarged perspective view of the above-mentioned wood thin piece, wherein 1 is a wood thin piece, 2 is a flitch, 3 is a sliced veneer. .

Claims (2)

(57) [Claims] 1. A thin piece of wood is coated with an adhesive selected from urethane adhesive, urethane emulsion adhesive, soft (40% or more in elongation) polyester resin, and vinyl acetate adhesive, and block-formed by compression molding. Form a flitch and slice this flitch to form a sliced veneer.
A method for producing a wood decorative veneer characterized by subjecting this sliced veneer to WPC treatment. 2. An adhesive selected from urethane adhesive, urethane emulsion adhesive, soft (elongation 40% or more) polyester resin, and vinyl acetate adhesive is applied to a thin piece of wood and is blocked by pressure molding. Form a flitch and slice this flitch to form a sliced veneer.
A method for producing a wood decorative veneer, which comprises subjecting this sliced veneer to foaming WPC treatment.