JPS6192854A - Manufacture of woody decorative material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a decorative wood material suitable as a color top for washbasins, sinks, etc., or a decorative surface material for furniture, fittings, etc.

(Structure of conventional example and its problems) In the conventional resin injection treated wood board, which is made by injecting and hardening a synthetic resin liquid into a thin wood board, the resin liquid is a conduit of the wood.

It fills the voids of tracheids, etc., increasing its transparency, and the spring wood, which has a large percentage of voids, becomes transparent, revealing a three-dimensional wood grain pattern, exhibiting excellent cosmetic properties, and being used as construction materials and other materials. It is useful as a decorative material.

However, in order to inject the resin liquid into the interior of the wood sufficiently, the above-mentioned resin injection treated wood is carried out by injecting the resin liquid in a sealed container such as an injection pot using reduced pressure, pressurization, or reduced pressure. As a result, there are the following problems.

(2) It is difficult to frequently change the type of resin liquid to be injected, the mixing ratio of the 9 colors, etc. every small Q+y, and it is not possible to support small-lot, high-mix production.

■ Immediately after injection treatment, a large amount of unsolidified resin liquid adheres to the entire surface of the wood veneer.

When transferred to the next curing process or adhesion process with other materials, there are problems such as the resin liquid adhering to transportation equipment and the like, contaminating the equipment, making it difficult to handle.

■ There is also a lot of waste of resin liquid as it adheres to the wood veneer.

Furthermore, such thin wood boards are hardened by being injected with resin liquid, for example.

When used as a color top for washbasins, sinks, etc., the holes are difficult to work with, and the parts that are to be removed are also injected with resin, which is uneconomical as expensive resin is wasted. It is.

In addition, in order to solve this problem, it is possible to perform resin injection treatment after providing a coating that prevents resin liquid from penetrating the thin wooden board, but as mentioned above, resin injection treatment using an injection pot is possible. This poses problems in terms of productivity, etc.

(Purpose of the Invention) The present invention was made in view of these problems, and makes it possible to partially make the resin liquid transparent by press-fitting the resin liquid into the thin wood board partially without using an injection pot. To provide a method for producing a decorative wood material (Old structure) In order to achieve the above object, the method for producing a decorative wood material of the present invention is to provide a method for producing a decorative wood material between a thin wood board and a non-air permeable mold release sheet. After partially applying a synthetic resin liquid coating layer and overlapping them,
By pressurizing these, the synthetic resin liquid is pressurized into the voids of the thin wood board, thereby partially making the thin wood board transparent.

The release sheet used in the method of the present invention is 1 pv
c, acrylic, ABS, polyester.

Synthetic resin sheets such as polypropylene and polyester are used, and as thin wood boards, softwood is used.

Although any kind of hardwood may be used, a thin plate with a thickness of 0.6 fi or less is used because the resin liquid is press-fitted to make it transparent.

Further, the thin wood board may be a thin board made by laminating and bonding a plurality of wood blocks in advance to form an assembled product and slicing the block, and further dyeing, bleaching, etc. as necessary. The reason for using a thin wood board with a thickness of 0.6 m or less as the thin wood board is as follows.

In other words, when a thin wood board is sliced to a thickness of 0.6mm or less, a portion of the conduit or tracheid penetrates from the front surface to the back surface of the thin board, which improves air permeability and penetration of the resin liquid. This is because the coating layer of the resin liquid can be pressed onto the surface of the thin plate using a pressure plate and can be sufficiently penetrated from the surface to the inside.

The synthetic resin liquid that is press-fitted into the thin wood board is composed of either thermosetting resin or thermoplastic resin, or a mixture of both.

According to the general classification, the thermosetting resins mentioned here include phenol-formaldehyde co-condensates, melanin-formaldehyde co-condensates, polyuretashi resins, polyester resins, evo+shi resins, diallyl phthalate resins, and beshirizu anamishi resins. Thermoplastic resins include acrylic resins, modified vinyl resins, etc., and not only these polymers and polymers, but also mixtures of T-mer and J-mer may be used.

Further, this synthetic resin liquid can be used as a coral color by adding dye or pigment in advance to such an extent that transparency is not lost.

Partial application of the resin liquid may be performed on either the thin wood board or the release sheet, but since the release sheet absorbs almost no synthetic resin liquid compared to the thin wood board, the coating thickness of the resin liquid layer is It is possible to provide a uniform thickness and polymerize it with the thin wood board, making it easy to adjust the coating thickness of the resin liquid layer, resulting in uniform transparency and less cracking compared to thin wood boards. This makes it easy to handle when polymerizing the synthetic resin liquid layer, and furthermore, it prevents air from entering the interface between the release sheet and the thin wood board, resulting in a product with stable cosmetic properties.

The viscosity of the synthetic resin liquid is preferably such that it does not drip from the thin wood board or release sheet.

In addition, the amount of synthetic resin liquid applied depends on the performance required for the reinforced wood thin board, such as water resistance, abrasion resistance, weather resistance, etc.
The thickness of the reinforcing layer depends on the tensile strength, etc., and the degree of transparency,
Although it is difficult to make a general statement because it varies depending on the resin amount distribution or impregnated amount, it is sufficient to apply the amount as long as it is sufficient to fill the voids inside the thin wood board and make the spring material transparent.For example,
If it is a thin wood board with a thickness of 0.2 to 0.61111, then 1
An application amount of 50 to 4509 forces is sufficient.

The coating method is by applying a coat or using a device such as a spray coater, an O-ru coater, a blow coater, a knife coater, or the like.

In this way, the resin liquid is applied to either the thin wood board or the release sheet so that the resin liquid is layered on the thin wood board except for the areas where cutting, perforation, or cutouts are to be performed, and then the resin liquid layer is applied. The thin wood board and the release sheet are stacked so that they are interposed in a sac-duit pattern, and this is inserted between a pair of upper and lower heating press plates and compressed by the hot press plate to sufficiently crush the resin liquid on the thin wood board. At the same time, it increases the oil pressure resistance.

Under this condition, the temperature of the resin liquid is gradually raised using a hot platen to lower the viscosity of the resin liquid, and the resin liquid is press-fitted into a predetermined portion of the thin wood board from the surface toward the inside.

The pressurizing force of the hot pressing plate, the pressurizing schedule, and the temperature increase rate of the resin liquid are determined by the amount of voids in the thin wood board, the size of the voids, the length of the voids, the thickness of the resin press-in, the change in viscosity due to the temperature of the resin fluid, and the surface of the resin. Determine by considering tension and fluidity.

The pressurizing method and device may be either a commonly used flat plate press or a continuous press, and the pair of upper and lower pressurizing plates may be metal plates as long as they can uniformly transmit pressure to the resin liquid. It may be any plate-like material such as a plastic plate or the like.

Further, a method for heating the resin liquid is to directly heat the disk body with heated steam, heated oil, or an electric heater, and use this heat to raise the temperature of the resin liquid through a suitable material.
Although the plate body may be used as a hot platen as mentioned above,
Alternatively, the plate may be used as a pressure plate, and heating may be performed by directly increasing the temperature of the resin liquid using high frequency waves or electromagnetic waves.

Depending on the wood species, cell diameter, moisture content, void volume, resin composition, etc. of the thin wood board, it may be difficult for the resin liquid to enter.
In such a case, if a synthetic resin liquid layer is interposed between the thin wood board and the transparent sheet, and a breathable material such as nonwoven fabric or paper is placed between the thin wood board and the pressure plate, the breathable material can be removed. Through the thin wood, the air in the gaps in the board can escape and the resin can be press-fitted uniformly.

In this way, the synthetic resin liquid press-fitted into the voids of the thin wood board is solidified as it is between the pressure plates, or it is taken out from the pressure plate and solidified by appropriate means such as heating or cooling, and then the release film is peeled off. It is.

Note that plywood or other base material may be adhered to the back surface of the thin wood board in advance.

Additionally, if a concave groove is formed in advance on the surface of the thin wood board by pressing or the like at the boundary between the part that becomes transparent when the resin liquid is injected and the part that is not injected with the resin liquid, the resin liquid will be press-fitted into the thin wood board. The resulting flow is prevented from moving outside the boundary by the groove, and the boundary between the resin-injected portion and the non-injected portion within the wood becomes clear, which is preferable.

Next, embodiments of the present invention will be described with reference to the drawings.

Example 1 (Figures 1 to 3) A thin wood board (1) backed with a base material (4) made of plywood (
Corresponding to the part for opening the washbasin hole @) and the part for opening the piping port (b), which are provided in the center and outer periphery of the 0.2-thick hinoki wood), these parts -)■ ) has the same shape as the part d
> Polyester resin liquid (40% unsaturation): Curing agent (BPO) = in the part of the release sheet (2) excluding (6>)
1509/r of resin liquid mixed in a ratio of 100:1
x? After applying the resin at a ratio of
The resin liquid is pressed into the inside of the thin wood board (1) by heating and pressurizing it for 15 minutes and solidifying it, and then
The release sheet (2) was peeled off from the thin wood board (1).

The decorative material thus obtained is shown in the section (a) for opening the washbasin hole.
The spring wood part of the part other than the part for opening the washbasin hole (@) and the part for opening the pipe opening has become transparent due to the injection of resin liquid and solidification, and the wood grain appears three-dimensionally. Opening section■)
Since no resin liquid was injected into the parts, it was easy to cut out these parts.

Example 2 (Fig. 4) On the surface of the thin wood board (1) backed with the base material (4), the outer circumferential shapes of the toilet hole opening part (b) and the pipe opening opening part (b) were prepared in advance. A concave groove (5) with a contour matching that of Heat and pressurize the thin wood board (1) to form a concave groove (beyond the area surrounded by 5mm).
! The outside part was injected with resin.

At this time, the resin liquid layer (+) is prevented from flowing in the planar direction of the thin wood board (1) due to pressure, and is prevented from being cut off at the groove (5) and penetrating into the groove (5). As a result, a thicket with resin injection treatment and non-treatment areas clearly separated was obtained.

(Effects of the Invention) As described above, the present invention provides a method in which a synthetic resin liquid coating layer is partially provided between a thin wood board and an air-impermeable mold release sheet, the layers are overlapped, and then these are pressurized. This relates to a method for producing a decorative wood material, which is characterized in that the above-mentioned synthetic resin liquid is pressurized into the voids of a thin wood board to partially make the thin wood board transparent. There is no need to go through the complicated process of injecting a patch of synthetic resin liquid into a thin plate under reduced or increased pressure, and then solidifying it in another process.
The synthetic resin liquid is injected into at least most of the cell cavities of the thin wood board using the vertical pressure plate, making it possible to make the thin wood board transparent and at the same time obtain a reinforced wood decorative material, which simplifies the process and significantly reduces manufacturing costs. is possible.

Furthermore, it is now possible to perform each process continuously, such as applying resin liquid to thin wood plates or release sheets, laminating the thin wood plates and release sheets, and integrating them using heat and pressure. It allows for rationalization and is suitable for mass production.

In addition, since the resin liquid layer can be placed and handled only on the thin wood board or mold release sheet, the equipment etc. will not be contaminated by the resin liquid layer as in the conventional injection method, and the work can be carried out smoothly. Moreover, since the process from applying the synthetic resin liquid to press-fitting and solidifying can be done in a short time, it is also possible to use resins with short pot lives, which widens the range of resins that can be selected to suit the purpose and application. It is.

Moreover, since the resin liquid layer is applied only to the necessary parts of the thin wood board or release sheet, and the resin is injected into the desired parts of the thin wood board, subsequent processing is difficult.

For example, with Koumei, such processing can be easily performed without injecting resin liquid into parts, mounting parts, or appropriate cut-out parts, and other parts are beautiful due to resin injection, and have good wear resistance, hardness, etc. It can be formed into a decorative board with excellent physical properties.

[Brief explanation of the drawing]

The drawings show examples of the present invention; FIGS. 1 and 2 are simplified explanatory diagrams showing the method for manufacturing the decorative material of Example 1, FIG. 8 is a simplified perspective view of the decorative material obtained, and FIG. FIG. 3 is an explanatory diagram of a method for manufacturing a decorative material of Example 2. (1)...Thin wood board, (2)...Release sheet, (3
)...Resin liquid layer.

Claims (4)

[Claims] (1) After partially applying a coating layer of transparent synthetic resin liquid between the thin wood board and the non-breathable mold release sheet and overlapping them, pressurize them to create a space between the thin wood boards. A method for producing a decorative wood material, which comprises making a thin wood board partially transparent by pressurizing the synthetic resin liquid into the part. (2) A method for manufacturing a decorative wood material according to claim 1, characterized in that a groove is provided in advance at the boundary between a portion of the thin wood board where the resin is press-fitted and a portion where the resin is not press-fitted. (3) A method for producing a decorative wood material according to claim 1 or 2, which comprises adhering a thin wood board to a suitable base material in advance. (4) After partially making the thin wood board transparent, the release sheet is peeled off and the parts where the resin is not press-fitted are subjected to processing such as cutting. Or the method for producing a wood decorative material according to item 3.