JPS60236704A - Manufacture of reinforced 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 producing a resin-reinforced decorative wood material in which the transparent wood grain pattern and the color of the colored backing material are harmonious.

Structure of conventional examples and their problems Conventionally, in order to manufacture this type of decorative material, resin liquid is injected into a wood veneer under reduced pressure, increased pressure, or reduced pressure in a closed container such as an injection pot, and then coloring is performed. A known method is to place and bond the resin-injected wood veneer onto a plate-like base material coated with an adhesive, but this method involves injecting resin into the wood veneer, solidifying process, and colored plate-like base material. Since the adhesion process is a separate process,
The manufacturing process requires considerable time and effort, and the resin injection process is performed in a closed container such as an injection pot, resulting in the following problems.

(2) It is difficult to change the type, blending ratio, color, etc. of the resin liquid to be injected frequently and for each small lot, making it impossible to handle 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. There are problems such as liquid adhesion and contamination of equipment, making it difficult to handle.

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

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems.The present invention has been made in view of the above-mentioned problems of the conventional art. To develop a method for manufacturing decorative wood materials that can be produced inexpensively and efficiently without the need for large-scale equipment such as injection pots, that can be easily handled during the process, and that can be produced in small quantities and in a wide variety of products. This is what we provide.

Structure of the Invention In order to achieve the above object, the method for manufacturing a reinforced wooden decorative board material of the present invention includes a thin wood board and a gap between the thin wood board and the thin wood board filled between a transparent sheet and an opaque colored backing material. A liquid layer of synthetic resin is applied in an amount sufficient to make the spring material transparent, and this is pressurized between upper and lower pressure plates to press the liquid layer of synthetic resin into the void of the thin wood board. The thin wood board, the transparent sheet, and the colored backing material are integrated to make the spring material part of the thin wood board transparent, and the color of the colored backing material is made to appear through the transparent sheet and the spring material part.

The transparent sheet used in the method of the present invention includes pv
c, synthetic resin sheets, films, or thin plates such as acrylic, ABS, polyethylene, polypropylene, and polyester; and fibrous sheets such as thin paper, linter paper, and synthetic paper that become transparent by impregnating them with resin liquid; The type of sheet to be used is selected depending on the properties of the desired decorative material.

Incidentally, such a transparent sheet may be colored as appropriate to the extent that transparency is not lost, or may be partially printed with a wood grain pattern or the like as necessary.

On the other hand, opaque colored backing materials include colored synthetic resin sheets, synthetic resin boards, paper, vapor-deposited films, metal sheets, or colored coating or coating on the surface of organic or inorganic plate-like materials such as synthetic resin sheets, synthetic resin boards, vapor-deposited films, and synthetic boards, particle boards, and silica boards. A material with an opaque colored layer provided by pasting a colored sheet is used, and such colored backing material is selected depending on the properties of the decorative material to be obtained, and the thickness is variable. Not particularly limited. Note that the base color may be used as is, like a metal sheet.

The thin wood plates that are superimposed and integrated between the colored backing material and the transparent sheet may be thin wood plates of any species, such as conifers or hardwoods, but they may be made transparent by press-fitting a resin liquid. A thin plate with an upper thickness of 0.6 mm or less is used.

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 aggregate block body, and slicing this block body.
It may be bleached or the like.

The reason for using a thin wood board with a thickness of 0.6 mm or less is as follows.

In other words, when a thin wood board is sliced to a thickness of 0.6 mm or less, a portion of the conduit or tracheid passes through the thin board from the front surface to the back surface, which improves air permeability and resin liquid permeability. 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 general classification, the thermosetting resins mentioned here include phenol/formaldehyde cocondensates, melamine/formaldehyde cocondensates, polyurethane resins, polyester resins, epoxy resins, diallylphthalate resins, benzoguanamine resins, etc. Thermoplastic resins include acrylic resins, modified vinyl resins, etc., and not only prepolymers and polymers of these resins, but also mixtures of monomers and oligomers may be used.

In addition, when obtaining a flexible decorative material, it is preferable to use a synthetic resin liquid that has appropriate flexibility after curing; for example, in the case of a thermosetting resin, it is preferable to It is possible to use resins produced by blending or reaction conditions such that the resin exhibits the desired properties, or resins that are imparted with flexibility by adding a plasticizer.

Further, this synthetic resin liquid can be colored by adding dyes or pigments to the extent that transparency is not lost.

The following methods are available for disposing a thin wood board and a synthetic resin liquid layer between the transparent sheet and the backing material.

a. A method of applying resin liquid directly to the surface of a thin wood board, for example, applying a resin liquid to one or both sides of a thin wood board using a device such as a spray gun, roll coater, flow coater, knife coater, etc., and coloring the transparent sheet. A method in which it is inserted between the backing materials and polymerized.

b. Methods for applying to other materials than wood laminates, e.g.
A method in which a synthetic resin liquid is applied to either the colored backing material or the transparent sheet, or both, and the resin liquid coated surface is superimposed on the thin wood board.

C0 A method of combining a and b above.

Among the above methods, if a synthetic resin liquid is applied to a transparent sheet and the coated layer of the synthetic resin liquid is superimposed on a thin wood board, the transparent sheet absorbs almost no synthetic resin liquid compared to a thin wood board, so the resin liquid It is possible to apply a layer with a uniform thickness and polymerize it with the thin wood board, making it easy to adjust the coating thickness of the resin liquid layer, achieving uniform transparency, and making it possible to coat the thin wood board. It is easier to handle when stacking resin layers because it is less likely to cause cracks in the sheet than when handling it by applying it, and the cosmetic properties are also stable because air does not enter the interface between the thin wood board and the transparent sheet. You get what you get.

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

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 0.6 fins, 150~
A coating amount of 450 g/i is sufficient.

In this way, the thin wood board is placed between the transparent sheet and the opaque colored backing material via the synthetic resin liquid layer, and then inserted between a pair of upper and lower heating press plates and compressed by the hot press platen. The resin liquid pressure is increased at the same time as the synthetic resin liquid is sufficiently compressed.

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 from the surface of the thin wood board toward the inside.

Here, the resin liquid is press-fitted into most of the cell cavities of the thin wood board, but if the heating method or resin composition is such that the viscosity of the resin liquid drops rapidly, the resin liquid will flow into the minute voids in the thin wood board. As a result, not only can the resin liquid not be sufficiently press-fitted into the thin wood board, but also the hot press platen and pressure equipment may be contaminated with the resin liquid. It is necessary to adjust the viscosity.

In addition, the pressurizing force of the hot pressing plate, the pressurizing schedule, and the temperature rise 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 viscosity change depending on the temperature of the resin solution, and the resin Determine by taking into account the surface tension and fluidity of

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 cases, a synthetic resin liquid layer is placed between the thin wood board and the transparent sheet and polymerized, and the backing material is made of a breathable material such as non-woven fabric, paper, or wood board. By doing so, it is possible to improve the escape of air in the voids of the thin wood board through the backing material, and to perform uniform resin press-fitting.

In this way, the synthetic resin liquid press-filled 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.

At this time, the opaque colored backing material and transparent sheet become integrated with the thin wood board as the synthetic resin liquid solidifies.

The decorative material made of the synthetic resin-impregnated thin wood board with the transparent sheet and backing material integrally layered on the front and back surfaces obtained in this way has a color contrast between the transparent thin wood board and the opaque colored backing material. The combination results in a wood-based decorative material with a new color and flexibility in bending.

Furthermore, when applying this decorative material to the surface of another material such as a base material, by pasting it through a backing material, the defects of the base material are hidden and the defects of the base material do not appear.

Description of examples Next, embodiments of the present invention will be described based on the drawings.

A soft PVC sheet (4) colored brown was placed on a pair of upper and lower heat press plates (11 (21), lower heat press plate (2)),
On top of this sheet (4) is a thin plate (5) of cypress wood with a thickness of 0.2 mm, and on the bottom surface is a polyester resin liquid (40% unsaturation).
A transparent polyester film (6) made by applying 150g/rrr of a resin liquid (3) mixed in a ratio of : hardening agent (BPO) = 100:1 is sequentially superimposed, and then the upper hot pressing plate (11) is Move it down and press the top and bottom heat pressing plate fil
(The resin liquid (3) was press-fitted into the gap of the thin wood board (5) by heating and pressurizing at 100°C for 21 minutes at 15 km/cut for 15 minutes, and a part of it was placed on the top side of the thin wood board (5). The resin liquid is allowed to penetrate and make the spring material transparent, and the resin liquid is cured to form a polyester film (
6) and the soft PVC sheet (4) were integrated with each other via a hardened resin.

The decorative material obtained in this way has extremely excellent translucency due to the transparent spring material of the thin wood board (5), and also has a soft PVC sheet (
The brown color (4) appeared on the surface, a deep wood grain appeared, and it had excellent flexibility.

When this decorative material was further adhered to the surface of the plywood with an ethylene-vinyl acetate adhesive, defects such as scratches on the surface of the plywood, which was the base plate, were hidden and the cosmetic properties were not affected in any way.

Effects of the Invention As described above, the method for producing a reinforced decorative material of the present invention includes a thin wood board between a transparent sheet and a colored backing material, and a coating sufficient to make at least the spring wood portion of this thin wood board transparent. This is placed between the upper and lower pressure plates and pressurized by the pressure plate. At the same time, the thin wood board, the transparent sheet, and the colored backing material are integrated to form the thin wood board. Since the spring wood part is made transparent and the color of the colored backing material is made to appear through the transparent sheet and the spring wood part, as in the past, a synthetic resin liquid is applied to the thin wood board in advance by applying reduced pressure or pressure. Without going through the complicated process of injecting honey and solidifying it in another process, the synthetic resin liquid was injected into at least most of the cell cavities of the thin wood board using vertical pressure plates, making the thin wood board transparent and strengthening it at the same time. It is possible to obtain a wood decorative material, simplify the process, and significantly reduce manufacturing costs.

Furthermore, when the synthetic resin liquid solidifies, the transparent thin wooden board, the transparent sheet, and the backing material are integrated to obtain a decorative material with excellent translucency and flexibility. The colors appear on the surface through the spring wood parts of the thin wood boards, creating a beautiful decorative material with a three-dimensional effect.

In addition, it is now possible to continuously perform various processes such as applying resin liquid to thin wood boards, transparent sheets, and backing materials, laminating the thin wood boards, transparent sheets, and backing materials, and integrating them using upper and lower pressure plates. At the same time, wood thin plates of a certain size are continuously fed between pressure plates through a backing material, and then a long transparent sheet, etc. is fed out, and then integrated under heat and pressure using a resin liquid to form a continuous strip. It is also possible to obtain decorative materials.

In addition, since the resin liquid layer can be placed and handled only on thin wood boards, transparent sheets, and backing materials, equipment, etc. will not be contaminated with resin liquid as in conventional injection methods, and work can be carried out smoothly. In addition, 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 potripes, giving you a wider range of options for selecting resins that suit the intended use. be.

The wood decorative materials obtained in this way can be used for many purposes, such as floor materials, furniture surface materials, wall materials, ceiling materials, etc., and can also be used as decorative materials for screens, lighting, etc. It can be used alone, and since both sides are reinforced with sheets, it has excellent flexibility, so it can be continuously molded and bonded to the surface of a member molded at a predetermined angle or curvature. In addition, the widely known cutting method involves pasting this reinforced wood decorative material on the base material with the transparent sheet on the front side and cutting it, or using a plate-like material as the backing material. This is possible by making a V cut on the back side, and the transparent sheet on the front side prevents the thin wood board from cracking at the bending part, allowing for good bending.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Figure 1 is a front view of a state in which synthetic resin liquid is applied to a backing material and overlapped with a thin wood board, and Figure 2 is a front view of a state in which it is hot-press molded. , FIG. 3 is a perspective view of the obtained decorative material. (1) F2)...Upper and lower heat pressing plate, (3)...Synthetic resin liquid, (4)...Backing material, (5)...Thin wood board,
(6) Transparent sheet. Patent applicant: Daiken Kogyo Co., Ltd. Shibe Otsu Tahe9jiK Ko Tahe

Claims (7)

[Claims] (1) A synthetic resin liquid layer with a coating amount sufficient to fill the thin wood board and the voids in the thin wood board between the transparent sheet and the opaque colored backing material to make the spring material portion of the thin wood board transparent. By pressurizing this between the upper and lower pressure plates, the synthetic resin liquid layer is press-fitted into the gap of the thin wood board, and at the same time, the thin wood board, the transparent sheet, and the colored backing material are integrated to form the spring material of the thin wood board. A method for producing a reinforced wood decorative material, characterized in that the colored backing material is made transparent so that the color of the colored backing material is exposed through the transparent sheet and the spring wood portion. (2) The method for producing a reinforced wood decorative material according to claim 1, wherein the thickness of the thin wood board is 0.6 mm or less. (3) A method for manufacturing a reinforced wood decorative material according to claim 1 or 2, characterized in that the synthetic resin liquid layer is applied to a transparent sheet and placed between upper and lower pressure plates. (4) A method for producing a reinforced wood decorative material according to claim 1 or 2, characterized in that the synthetic resin liquid layer is applied to a thin wood board and placed between upper and lower pressure plates. (5) A method for manufacturing a reinforced wooden decorative material according to claim 1 or 2, characterized in that the synthetic resin liquid layer is applied to a colored backing material and placed between upper and lower pressure plates. (6) The reinforced wood makeup according to any one of claims 1 to 5, wherein the colored backing material is a sheet-like material such as a synthetic resin sheet, a metal sheet, or paper. Method of manufacturing wood. (7) Any one of claims 1 to 5, characterized in that the colored backing material is a plate-like material with a colored layer provided on the surface of plywood or other plate-like material. A method for producing reinforced wood decorative materials.