JP2001065166A - Interior finish material having soundproof property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the function and workability of an interior finish material by bonding a decorated plywood, a wood plate having a viscous or an elastic resin injected thereto, and a buffer material together in this order from above, to form lamination. SOLUTION: An interior finish floor material or an interior finish wall material is formed by bonding a decorated plywood 1 consisting of an inexpensive wood veneer and a decorative veneer formed of a natural valuable wood stuck to a surface of the former, an elastic resin injected plate 2 obtained by injecting a viscous or an elastic resin into a wood plate, and a buffer material 5 formed of a foamed resin or the like, together in this order from above, to thereby form lamination. Alternatively, the decorated plywood 1, the elastic plate 2, a wood substrate 4 such as a plywood, and the buffer material 5 may be bonded together in this order from above. Next, cut grooves are formed in a rear surface of the substrate 4, and therefore the internal finish material may conform to an uneven surface of concrete when it is directly stuck to the same. Further, impact sound from above is dispersed. When the decorated plywood 1 is hit at its upper portion, the elastic plate 2 functions as a buffer material, to damp hit sound. Thus, high soundproof property can be ensured, the workability and dimensional stability are improved at a low cost, and further the weight reduction is achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-insulating interior material such as a floor material used for a building such as a house, and more particularly to a floor material requiring sound insulation.

[0002]

2. Description of the Related Art Wooden boards are widely used as interior materials for houses, stores, offices and the like. Its application is widely used for floors, walls, and ceiling flat surfaces excluding structural materials such as pillars. Floors, walls,
Plywood is the most widely used wood board for ceilings. However, plywood has low soundproofing performance,
This is a major problem especially in the case of flooring. Wall materials also have the same problems as floor materials, albeit to varying degrees. In the case of flooring, to improve soundproofing performance,
As in the cross-sectional shapes of FIGS. 1 to 3, a cushioning material having a soundproofing property is attached to the back surface, or a cushioning material is interposed in the inner layer of the flooring material, or a cut groove is formed in the base material. Measures have also been adopted. It is generally accepted that the thicker the cushioning material, the better the soundproofing performance.

[0003]

Since the cushioning material is expensive, studies have been made to reduce the thickness as much as possible to improve the soundproofing effect, and inexpensive cushioning materials have also been developed. In the case of flooring, thickening the cushioning material not only increases the manufacturing cost. When a person walks, the body weight sinks down and the person feels fluffy, and the walking feeling deteriorates, so that a too thick cushioning material cannot be used. It is clear from empirical rules and experiments that the soundproofing performance is improved when the cushioning material is further provided on the intermediate layer, rather than provided on the back surface.

[0004] Also, since soundproofing floor materials are often directly adhered to the concrete floor surface, as shown in the lower diagram of FIG. 1 and FIG. Making it easier. Further, it is described in Japanese Patent Publication No. 56-23509 that the kerfs can disperse the impact sound from above and improve the soundproofing performance.

[0005] As described above, two measures for improving the soundproofing performance of the floor material are mainly employed, namely, the kerf and the cushioning material. However, a decorative veneer of natural wood is mainly used for the surface of the flooring material. The veneer veneer made of natural wood is not only excellent in aesthetic appearance, but also does not become a source of mites like a carpet, and also absorbs or releases moisture depending on the surrounding environment, so it is like a synthetic resin plate It has many advantages over other materials, including no condensation. Therefore, it is certain that natural veneer veneers will continue to be used in large quantities as decorative materials on the floor surface.

However, decorative veneers made of natural wood used for the floor surface are mainly precious wood veneers with a beautiful grain, and are expensive. Therefore, in many cases, plywood or plywood manufactured from inexpensive wood is used. It is used in combination with a veneer substrate such as a veneer. That is, in many cases, a thin veneer veneer is attached to the surface of a plywood or veneer made of inexpensive wood.

[0007] However, wood itself is a sounding body, and emits sound when hit. Therefore, when the surface of the flooring material is formed with a wooden decorative board, a sound generated when an object is dropped on the floor surface or a chair leg is rubbed is not absorbed and transmitted to the surroundings. Generally, the thicker the wooden decorative board, the larger the sound output. Therefore, the soundproofing performance is improved by forming the surface of the flooring with a thin wooden decorative board, but in the case of a soundproofing flooring directly attached to concrete,
Since the cushioning material is stuck on the back surface, the woody portion excluding the cushioning material needs to have a certain thickness or more. If the wooden portion excluding the cushioning material is too thin, when a large load is locally applied, local sinking occurs, and the floor material may crack. Also, when a person is walking on it, the walking feeling is not good because of the fluffy feeling.

Therefore, it is necessary to reduce the sound while securing the thickness of the wooden portion excluding the cushioning material of the flooring.
However, at a reasonable cost, the workability required for flooring,
At present, there is no suitable material that satisfies light weight and has dimensional stability such that it does not warp significantly due to environmental changes such as ambient humidity and temperature, and yet has low sound production.

[0009]

As a result of intensive studies, the present inventors have solved the above problems by the following means. First, the observation that motivated the completion of the present invention will be described. In ordinary wood, a hollow portion exists inside a wood fiber cell in addition to a conduit, a temporary conduit, and the like inside. In this analogy, wood has a structure like a bundle of hollow pipes. Therefore, when struck from the outside, it reverberates in the hollow portion inside, amplifies and emits a loud sound, and the sound is sustained. On the other hand, if the hollow portion of the pipe is filled with water, even if the pipe bundle is hit, a dull sound will be produced, which will be attenuated immediately, and the duration of the sound will be short. Similarly, when wood is hit with high moisture content, which contains a large amount of water inside, it produces a duller sound than dried wood, and its duration is shorter.

[0010] When wood is used for flooring or the like, shrinkage occurs due to changes in surface hardness and moisture content, which are defects of wood.
In order to improve the property of expanding, WPC (Wood Plastic Combination) in which plastic is injected or impregnated into wood is known, and is often used as a decorative veneer on the surface of flooring. These WPC-treated woods are translucent and have a three-dimensional effect, so the design of the floor material surface is improved, and since the hardness is higher than the wood and it is less susceptible to scratching, it is used as a decorative material for the surface of the floor material. It is widely used.

The WP used on the surface of these flooring materials
Most of the C-treated veneer veneers are mainly infused or impregnated with a polyester resin and cured, and those infused or impregnated with other resins are hardly practically used. The reason is that, in addition to the above-mentioned requirements from the design aspect, in the case of flooring materials, high surface hardness, heat resistance and durability are required. This is because a resin which satisfies these conditions and is relatively inexpensive and which is equal to or superior to the polyester resin is not found.

However, since the cured polyester resin is harder than wood, the wood decorative veneer in which the polyester resin is injected or impregnated is almost acoustically integrated inside the veneer to attenuate the impact sound from the surface. I can't let it.
In other words, a wood veneer veneer infused or impregnated with a hard resin such as a polyester resin has characteristics intermediate to those of a wood and a plastic plate, and almost no effect of attenuating the impact sound can be expected.

Therefore, the present inventor has devised to inject or impregnate a resin having acoustic characteristics much closer to water than polyester resins. A wooden board injected or impregnated with a hard resin such as a polyester resin has an acoustic characteristic intermediate between that of wood and a plastic board, whereas a wooden board injected or impregnated with a viscous or elastic resin such as rubber ( Hereinafter, simply referred to as an elastic resin injection plate)
Has acoustic characteristics close to those between rubber and wood. However, a wooden board into which a viscous or elastic resin such as rubber is injected or impregnated has a soft surface hardness, is easily damaged, has low heat resistance, and does not have a sufficiently soft function as a floor surface material. Therefore, the inventor has devised the configuration of the floor material shown in FIGS.

In FIGS. 1 to 3, the uppermost layer 1 is a decorative material for the surface of the flooring material, which is mainly a decorative veneer of natural precious wood or a wooden veneer of natural precious wood is attached to the surface of a thin and inexpensive wooden veneer. A decorative board is used. In the case of an interior wall or the like, a thin synthetic resin plate or printed paper may be used. The second layer 2 is an elastic resin injection plate obtained by injecting or impregnating a viscous or elastic resin such as rubber into a wooden plate such as a wooden veneer or a plywood. Constitutes the wooden decorative panel 6. 5 is foamed resin, sponge, non-woven fabric,
It is a cushioning material having a cushioning effect, such as a rubber plate or a cork plate. FIG. 3 includes the above three layers. Reference numeral 4 denotes a wood base material such as plywood, fiber board, or particle board. Reference numeral 3 denotes a cushioning material having a cushion effect such as a foamed resin, sponge, nonwoven fabric, rubber plate, or cork plate having substantially the same properties as the third layer.
These layers are adhered by an adhesive or the like.

In the case of the lower drawing of FIG. 1 and the upper drawing of FIG.
There is a kerf from the back side, but the effect of this kerf is, as described above,
The purpose is to make it easier to conform to the uneven surface of the concrete and to disperse the impact sound from above to improve the soundproofing performance.

Next, the soundproofing performance of the floor material having the structure shown in FIG. 1 will be described. When the uppermost layer of the decorative material 1 is hit from above, if the decorative material 1 is a hard sounding body such as a wooden veneer, the amplitude is pronounced. In the case where 2 is a normal wooden board into which no elastic resin is injected, the acoustic properties of this wooden board are almost the same as those of the upper decorative material 1, so that the decorative material 1 and the wooden substrate 4 are integrated. Amplitude. However, in the case of the present invention, since the elastic resin injection plate 2 has an acoustic characteristic intermediate between that of elastic or viscous resin such as rubber and wood, it plays a role of a cushioning material and attenuates the impact sound. .

In the case of FIG. 2, when the reference numeral 2 is a conventional wood board into which no elastic resin is injected, the amplitude is integrated with the upper decorative material 1. That is, the decorative material 1 and the wooden board 2
As a result, a loud sound is emitted, and the loud sound is transmitted to the wooden base material 4 although it is attenuated by the lower cushioning material 3. On the other hand, in the case of the present invention, the decorative material 1 is a relatively large sounding body, but since the thickness is thin, the sounding amount is small. Since the elastic material is injected into the lower wooden board of the decorative material 1 and has an intermediate acoustic characteristic between an elastic body such as rubber and wood, the decorative material 1 and the elastic resin injection plate 2 are bonded and integrated. However, the sound transmitted to the lower part is much lower than in the case of the prior art flooring. The same applies to the one in FIG.

On the other hand, regarding the surface hardness and heat resistance required for the surface decorative material of the flooring material, there is no problem because the decorative material such as wood veneer of natural precious wood same as the prior art is used for the uppermost layer. The elastic resin injection plate 2 has a hollow portion in which an elastic or viscous resin is injected or impregnated. Since the skeleton is made of wood, the elastic resin injection plate 2 has dynamics such as compressive strength, tensile strength, and bending strength. The target performance is almost the same as wood, so there is no problem in strength.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a wooden veneer in which a decorative material 1 such as a thin veneer of natural wood is pasted on the surface of a wooden plate 2 in which a viscous or elastic resin such as rubber is injected or impregnated. 6
Is used. The decorative material 1 of the first layer and the elastic resin injection plate 2 are bonded and integrated to form a wooden decorative plate 6, and the decorative material 1 of the uppermost layer of the integrated wooden decorative plate 6 is a floor material. Since the surface needs to have the necessary design, surface hardness, and heat resistance, it is inevitably selected from a relatively large sounding body such as a wooden veneer of natural wood.

However, since the decorative material 1 may be very thin, the sound volume of the decorative material 1 can be reduced. The elastic resin injection plate 2 below the decorative material 1 has a smaller sound volume than a normal wooden plate, but it does not mean that it hardly sounds like a cushioning material, so it is meaningless to make it thicker than necessary. As described above, in the case of flooring, it is necessary to secure a certain thickness of the wooden portion. Therefore, in the case of the configuration of FIG. 1, it is better to make the wood base material 4 as thin as possible and to make the elastic resin injection plate 2 thicker, so that the soundproofing property is improved. Since it is more expensive than the base material, the thickness of the elastic resin injection plate 2 is 1/3 to 1/2 of the thickness of the wooden base material 4.
Good degree.

In the case of the structure shown in FIG. 2, the cushioning material 3 is provided on the third layer. As the thickness of the cushioning material 3 increases, the soundproofing performance improves. In order to improve the soundproofing performance, the wooden decorative board 6
Is extremely thin and the thickness of the cushioning material 3 is increased,
The sinking during walking becomes large, and the feeling becomes fluffy, and not only the walking feeling is deteriorated, but also the wooden decorative board 6 is cracked. If the cushioning material 3 does not have a thickness of at least 0.5 mm or more, there is almost no soundproofing effect, so it cannot be made very thin. Further, as described above, if the thickness is too large, the sinking becomes large, and in order to alleviate this, the wooden decorative board 6 must be further thickened, and as much as the cushioning material 3 and the wooden decorative board 6 are thickened, Floor material costs will increase. Therefore, the thickness of the cushioning material 3 is suitably about 0.5 mm to 2 mm, and the thickness of the wooden decorative board 6 is suitably about 3 to 9 mm. Within this range, it is appropriate that the thicker the cushioning material 3 is, the thicker the woody decorative board 6 is, and the thinner the cushioning material 3 is, the thinner the woody decorative board 6 is. It is.

The wood base material 4 has better soundproofing performance if a cut groove is provided, but may not be provided. Wood substrate 4
In the normal case, it is appropriate that each of them is about 6 to 9 mm. Like the cushioning material 3, the thickness of the lowermost cushioning material 5 is determined in consideration of the balance between the amount of sinking during walking or the weight of the furniture and the soundproofing performance.
mm is appropriate. FIG. 3 shows an example in which the present invention is applied to a floor material or a soundproof wall. The cushioning material has one layer, and the elastic resin injection plate 2 also serves as the wooden base material 4.

In the present invention, since the resin injected or impregnated into the elastic resin injection plate 2 is an elastic or viscous resin, for example, an elastic resin such as an acrylic resin is injected or impregnated. An example of a method of injecting or impregnating an acrylic resin is as follows.

As the resin liquid to be injected or impregnated, an aqueous solution of an acrylic resin is used. The wooden board is first degassed by reducing the pressure in a closed container. Next, the resin liquid is introduced into the closed container, and the hollow portion in the wooden board is filled with the resin liquid by applying pressure. When the resin liquid is sufficiently filled, the wooden board is taken out of the container and heated to disperse the water in the resin liquid and polymerize the resin. If the wooden board is extremely thin, do not use a closed container, apply the resin liquid to the front and back surfaces of the wooden board, allow it to penetrate into the wooden board, and then heat to disperse the water in the resin liquid and polymerize the resin. Is also good.

Previously, it has been described that general WPC-treated wood is infused with a polyester resin, and is hard to exert the effect of the present invention. It is viscous and can be used in the present invention. In that case, a diluent such as styrene for viscosity adjustment so as to easily penetrate into the wood board, into a mixture of several types of oligomers obtained by polymerizing the polyester resin to some extent,
A resin liquid mixed with a polymerization inhibitor such as hydroquinone for ensuring long-term storage of the resin is prepared.

The wood board is first depressurized and degassed in a closed container, as in the case of the acrylic resin. Next, the polyester resin liquid is introduced into a closed container, and the hollow portion in the wooden board is filled with the resin liquid by applying pressure. When the resin liquid is sufficiently filled, remove the wooden board from the container and heat it with a hot press to generate radicals in the resin,
Polymerize the resin. Immediately before the injection of the resin liquid, a polymerization initiator (catalyst) such as benzoyl peroxide is added to the resin liquid.
Insert As described above, if the degree of polymerization of the polyester resin injected into the wooden board is kept low, it is possible to use the polyester resin.

It is very difficult to inject a resin having a very high molecular weight, such as rubber, into the wood cells of the wooden board. It is possible to inject into the conduit part formed at the end. In many southern lumber, the conduit is very thick and the ratio of the volume of the conduit to the volume of wood is large. Many of these southern materials have a low specific gravity and poor surface appearance, but in the case of the present invention, the wood board into which the resin is injected does not appear on the surface of the flooring material. It is possible to inject a resin having a high molecular weight such as rubber into the material and use it.

[0028]

According to the first to fourth aspects of the present invention, the wooden decorative board 6
In addition, since a wooden board into which a viscous or elastic resin such as rubber is injected is used, the sound generated when the decorative material 1 is struck is small and is immediately attenuated. It is possible to obtain higher soundproofing performance. According to the fourth aspect of the present invention, since the cut groove is formed from the back surface of the wooden base material 4, when the cut surface is directly adhered to the concrete surface, it is well adapted to the concrete surface.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a soundproof flooring material of the present invention.

FIG. 2 is a cross-sectional view of the soundproof flooring material of the present invention.

FIG. 3 is a cross-sectional view of the soundproof flooring material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Makeup material 2 Elastic resin injection board 3 Buffer material 4 Wooden base material 5 Buffer material 6 Wood decorative board

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shun Tojo 5-2-1-1, Oji, Kita-ku, Tokyo Nippon Paper Industries Co., Ltd.

Claims (4)

[Claims] An interior wall material or floor material comprising a decorative material, a wooden board into which a viscous or elastic resin is injected or impregnated, and a cushioning material laminated and adhered in this order from the top. 2. A flooring material comprising a decorative material, a wooden board into which a viscous or elastic resin is injected or impregnated, a wooden base material, and a cushioning material laminated and bonded in this order from the top. 3. A flooring material comprising a decorative material, a wooden board into which a viscous or elastic resin is injected or impregnated, a cushioning material, a wooden base material, and a cushioning material laminated and bonded in this order from the top. 4. The flooring material according to claim 2, wherein a kerf is cut from the back surface of the wooden base material.