JPS5849183B2 - Manufacturing method of reinforced decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a reinforced decorative board using synthetic resin injection treated wood.

Synthetic resin injection treated wood has greatly improved physical properties such as abrasion resistance, impact resistance, water absorption and hygroscopicity compared to normal wood.
In addition, since the surface of the cylinder is beautiful as the wood grain is emphasized, it is used for building materials, furniture, etc. by being attached to the surface of a base material.

In order to obtain such a decorative board, conventional methods include placing a thin wood board injected with a synthetic resin liquid on top of the base material and curing the resin by means such as heat pressure to integrate it with the base material; A method has been adopted in which a resin injected into the thin board is cured, and then the resin-injected wood thin board is attached to the base material using an adhesive.

However, according to the former method, the volume of the injected resin contracts at the same time as it hardens, and in addition, the resin and the base material have different expansion, contraction rates, Young's modulus, etc., which tends to cause cracks in the thin wood board. Furthermore, when the thin wood board is extremely thin, the irregularities of the base material tend to appear on the surface, and for this reason, a relatively thick thin wood board must be used.

On the other hand, the latter method allows the use of thinner boards than the former method, but because the injected resin is hardened, cracks may occur due to slight impact during transportation or other handling. Moreover, it is difficult to perform sanding or other surface finishing on the surface of the thin plate.

In order to eliminate such drawbacks, the present invention aims to integrate a thin wood board injected with a synthetic resin liquid onto the surface of a base material by curing the synthetic resin, using a material that has less directionality and more flexibility than wood. The present invention provides a method for manufacturing a reinforced decorative board, characterized in that a fibrous sheet is also integrated therein.

That is, in the present invention, after a synthetic resin liquid is injected into a thin wood board, the thin wood board and a fibrous sheet are laminated on a base material in a desired order, and then the synthetic resin liquid is cured by means such as heat pressure. In this way, the thin wood board, the fibrous sheet, and the base material are integrated.

As mentioned above, the thin wood board and the synthetic resin liquid used in the method of the present invention can be cured by injecting a suitable combination of wood species and grain, thermosetting resin, thermoplastic resin, etc., or shrinkage of the resin. Since cracks occur due to the generation of internal stress, there is no particular limitation.

Injection of synthetic resin into thin wood boards is generally carried out by a reduced pressure method or a reduced pressure method, but even these methods cannot prevent the occurrence of cracks and the like.

In the method of the present invention, a fibrous sheet is used in order to eliminate the occurrence of such cracks and improve the physical properties of the decorative board obtained, and the sheet is generally made of paper such as kraft paper or cotton paper. However, fibrous sheets other than paper such as non-woven fabric can also be used.

This fibrous sheet is placed on the surface of the resin-injected thin plate,
Alternatively, it may be on the surface of the base material, that is, anywhere between the resin-injected thin board and the base material, but when superimposed on the surface of the resin-injected thin board, it is necessary to make the wood grain pattern of the resin-injected thin wood board appear on the surface. It is preferable to use tissue paper, linter paper, etc., which becomes transparent when the resin permeates into the sheet, and to use titanium paper, etc., to provide concealment properties when disposed between the thin wood board and the base material.

In addition, if the fibrous sheet is thin, wrinkles will occur, so for handling purposes, it is better to use a sheet of zog/m or more, and in order to allow the resin to penetrate easily, use a sheet of 6 og/m or less. .

Such resin-infused thin wood boards and fibrous sheets are laminated on a base material and integrated by heat pressure, etc. However, when the fibrous sheet is placed between the thin wood boards and the base material, the thin wood boards and the base material It is very effective in stress relief to counterbalance the movement of
Moreover, it increases the strength of the wood veneer against cracking causes.

However, in this case, the resin liquid adhering to the surface of the thin wood board acts on adhesion to the base material through the fibrous sheet, but there is a difference depending on the type of fibrous sheet and the amount of resin liquid adhered to the base material. It is desirable to apply adhesive to the surface in advance.

On the other hand, when a fibrous sheet is placed on the wood surface, it increases the strength of the thin wood board against cracking, and at the same time absorbs the resin liquid adhering to the surface of the wood board, making the surface smooth, so there is no need for treatments such as sanding. become.

Furthermore, by appropriately coloring or printing these fibrous sheets, it is possible to obtain a beautiful decorative board that combines the color and grain of the wood veneer, which has never been seen before.

As the base material, wooden materials such as plywood, asbestos cement boards, and other inorganic boards are used.

After laminating fibrous sheets and synthetic resin-infused wood thin plates on such a base material in an appropriate order, the resin is cured by heating or other methods, or once softened, the resin is cooled and solidified to be integrated. It is.

Next, examples of the present invention will be shown.

Example 1 After putting a one-meter-thick sliced veneer of stainless steel material into a resin injection pot, it was heated at 15 imH. ! After reducing the pressure to li', a synthetic resin solution containing 1.5% by weight of benzoyl peroxide was injected into the sliced veneer for 1 hour.

Next, the resin-injected sliced veneer was adjusted so that the amount of resin adhering to its front and back surfaces was 100, i7/m, and then the lauan plywood 1 with a thickness of 1.2 mm was prepared as shown in Fig. 1.
50 fi/tri' kraft paper 2 and resin-injected sliced veneer 3 were sequentially laminated on top, and hot pressed at a temperature of 120°C and a pressure of 10 kg/C1? Heat-pressing was carried out for 5 minutes under the conditions of L to obtain a decorative board in which these were integrated.

This decorative board cannot see through the surface defects of lauan plywood, and
No cracking was observed when the cold/heat cycling test A specified for JAS decorative plywood was conducted.

Example 2 Stainless steel material 0. After putting the 5 mrapi sliced veneer into the resin injection pot, 1 5 mrrtHf! After reducing the pressure to , a synthetic resin solution containing 1.5% by weight of benzoyl peroxide was placed in a pot, and the resin solution was injected into the veneer for 1 hour.

Next, the amount of resin attached to the front and back surfaces of the resin-injected veneer is Zoo! 9/m” and then the second
As shown in the figure, on the surface of lauan plywood 1 with a thickness of 12 ridges,
0 g/m kraft paper 2 and resin-infused veneer 3 and 2 0
g/m linter paper 2 was sequentially laminated and hot pressed for 5 minutes at a temperature of 120° C. and a pressure of 10 kg/= in a hot press to obtain a decorative board in which these were integrated.

This decorative plywood was subjected to the cold/heat cycling test A specified for JAS decorative plywood, but no cracking was observed.

In the above embodiments, laminated or resin-injected wood thin boards 3 were laminated on lauan plywood 1 as a base material with a fibrous sheet 2 such as kraft paper interposed therebetween, but as shown in FIG. The synthetic resin injection-treated thin wood board 3 and the fibrous sheet 2 may be laminated in sequence on the base material 1.

According to the present invention, a synthetic resin liquid is injected into a thin wood board, the wood thin board is laminated with paper or other fibrous sheets, and an appropriate base material, and then the synthetic resin liquid is cured to form a thin wood board, a fibrous sheet, etc. Since it relates to a method for manufacturing a reinforced decorative board characterized by integrating a sheet and a base material,
The fibrous sheet not only increases the strength of the thin wood board against cracking, but also reduces the directionality of the wood grain in the thin wood sheet, preventing the occurrence of cracks, which not only eliminates the occurrence of defective products in manufacturing, but also improves the strength of the thin wood board against cracking. Even if the thickness of the base material is reduced, the unevenness of the base material is less likely to appear on the surface, and cracks are less likely to occur, so the consumption of wood and resin liquid can be reduced and resources can be saved.

Furthermore, in the method of the present invention, by disposing a fibrous sheet on the surface of the thin wood board, the fibrous sheet can absorb the resin liquid adhering to the surface of the thin wood board and make it transparent.
A deep decorative board can be obtained, and processing such as sanding to remove adhering resin is not required.In addition, titanium paper or the like is used as the fibrous sheet, and this is placed between the thin wood board and the base material. By doing so, it is possible to hide defects, color patterns, etc. of the base material, and therefore, by arranging fibrous sheets on both sides of the synthetic resin injection-treated thin wood board, it is possible to provide both of the above-mentioned effects. .

Furthermore, since the method of the present invention can be carried out even if the thickness of the thin wood board is relatively thin, the injected resin can be bonded at the same time as the resin is cured without having to be bonded after curing, so that a large number of manufacturing steps can be omitted.

[Brief explanation of drawings]

The drawings show three embodiments of the present invention; FIG. 1 is a sectional view of Example 1, FIG. 2 is a sectional view of Example 2, and FIG. 3 is a sectional view of Example 3. 1... Base material, 2... Fibrous sheet, 3
...Synthetic resin injection treated wood thin board.

Claims (1)

[Claims] 1. After injecting a synthetic resin liquid into a thin wood board, the thin wood board is laminated with paper, other fibrous sheets, and an appropriate base material,
A method for manufacturing a reinforced decorative board, characterized in that the thin wood board, the fibrous sheet, and the base material are then integrated by curing the synthetic resin liquid. 2. A method for producing a reinforced decorative board according to claim 1, characterized in that a fibrous sheet is interposed between the synthetic resin-infused thin wood board and the base material. 3. The reinforced decorative board according to claim 1 or 2, characterized in that an adhesive is applied to the surface of the base material when laminating the base material, the fibrous sheet, and the synthetic resin-infused thin wood board. manufacturing method. 4. A method for manufacturing a reinforced decorative board according to claim 1, characterized in that the fibrous sheet is placed on a thin wood plate face tube. 5. Claims 1 to 4, characterized in that the fibrous sheet is appropriately printed or colored.
A method for producing a reinforced decorative board as described in Section 1.