JPS62129461A - Soundproof building material and its production - 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 [Technical Field] The present invention relates to a building material having a soundproofing effect and a manufacturing method thereof.

[Background Art] Floors of buildings made of steel frames, reinforcing bars, etc. are often made by laying floor finishing materials such as wooden tiles, synthetic resin tiles, rubber tiles, etc. on a floor base made of concrete or the like.

Using wooden tiles as a floor finishing material has the advantage of giving rooms a calmer feel and adding a sense of luxury to buildings, but wooden tiles have poor sound absorption properties, so the sound of footsteps echoes. There are disadvantages such as: On the other hand, synthetic resin tiles and rubber tiles have higher sound absorption properties than wooden tiles, so using them as floor finishing materials has the advantage of not making the sound of footsteps as loud, but it also gives the building a luxurious feel. The disadvantage is that it is difficult to provide

Therefore, a soundproof flooring material as shown in Figure 3 was developed. In this soundproof flooring material 11, a wooden piece 2 is adhered to the surface of a sheet 3 made of a sound absorbing material. When such soundproof flooring material 11 is laid down and fixed on top of the floor base, the upper surface of the wooden piece 2 constitutes the floor surface, making the room etc. feel calm and giving a sense of luxury to the building. You can also do it.

Furthermore, since the sheet 3 made of a sound absorbing material is provided on the back side of the wooden piece 2, a soundproofing effect can also be obtained.

However, with such soundproof flooring materials, the sound insulation effect (transmission loss of floor impact sound) is small, and the surface to which it is installed is uneven (uneven).
The problem was that it was difficult to absorb.

[Purpose of the invention]

In view of the above, it is an object of the present invention to provide a soundproof building material that further improves the sound insulation effect. are spread and bonded to one side of a sheet made of a sound-absorbing material, and a sheet made of a cushioning material is bonded to the other side of the sheet made of the sound-absorbing material. The first gist is a step in which a predetermined number of wooden pieces are spread and joined on one side of a sheet made of an absorbent material, and a step in which a sheet made of a cushioning material is joined to the other side of the sheet made of the sound absorbing material. The second gist is a manufacturing method for soundproof building materials that have the following characteristics.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 illustrate one embodiment of the invention. As shown in FIGS. 1 and 2, this soundproof building material 1 has a predetermined number of wooden pieces 2 spread over and joined to one side of a sheet 3 made of sound absorbing material, and a sheet 3 made of sound absorbing material. A sheet 4 made of cushioning material is joined to the other side. The soundproof building material of the present invention is used so that the side with the wooden piece is the front side, and the side with the sheet of cushioning material is the mounting surface side.

The cushioning material is not particularly limited, but a foam or the like can be used. The foam used is one made by foaming polyethylene resin, polystyrene resin, polyurethane resin, rubber, etc., but is not limited thereto. The expansion ratio of the foam is not particularly limited, but is preferably 5 to 15 times.

If it is below this range, the sound insulation effect may be reduced, and if it is above this range, the strength of the soundproof building material may be reduced. It is preferable that the foam has a closed cell structure because it has good heat insulation properties and is difficult for water to pass through, but a structure including both the continuous cell structure and the like may also be used.

The thickness of the sheet made of cushioning material is not particularly limited, but it is preferably 2.0 to 5.0 mm, and 3.0 mm to 5.0 mm.
mm, the sound insulation effect is particularly good. If it is below this range, the sound insulation effect may deteriorate, and if it exceeds this range, the surface of the soundproof building material may become unstable.

If a pigment colorant is mixed into the foam during molding,
The sound insulation effect can be further improved. In this case, it is preferable that the amount of the pigment coloring agent be 1.0 to 5.0% by weight of the foam from the viewpoint of sound insulation effect. In addition, the foam may contain an inorganic filler such as calcium carbonate.

As the sound absorbing material, for example, soft rubbers such as urethane rubber and silicone rubber, soft plastics, and others are used. When using soft rubber or soft plastic, it is preferable to use one with a hardness (Shore hardness) of 10 to 70" after curing. If it falls below this range, the strength of the soundproof building material may be weakened. , if it exceeds this range, there is a risk that the sound absorption effect will not be obtained.

The thickness of the sheet made of sound absorbing material is 3.0 to 20. It is preferable to use Oxs.

As for the wooden piece, the entire piece may be a single piece, but a piece in which an artificial decorative veneer or a natural decorative veneer is bonded to a substrate made of two plywood boards is used. As for the wood pieces, it is recommended to use reinforced wood (WPC), which is impregnated with monomers and then chemically polymerized using radiation or catalysts to strengthen it with resin. preferable. Strength of wood piece 1 dimensional stability.

This is because properties such as weather resistance, corrosion resistance, and abrasion resistance are improved. The thickness of the wooden piece is 1.0 to 20, considering the strength of the wooden piece, sound absorption effect 1 walking feeling, etc.
．． It is preferable to set it to 0 + n. Further, in consideration of preventing the phenomenon of pushing up the wooden pieces due to expansion and contraction of the wooden pieces, it is preferable that the interval between the wooden pieces is 0.51 or more. In this way, the sound of pedestrians passing through one wooden piece will be transmitted to the neighboring wooden piece by being blocked by the sound-absorbing material surrounding the wooden piece. In order to prevent the front side of the soundproof building material from becoming flat, it is recommended to connect the wooden pieces with uneven fittings such as a tongue-and-groove joint, as shown in Figure 2. Preferably. The size of the sheet made of cushioning material, the sheet made of sound absorbing material, and the wooden pieces, and the number of wooden pieces to be joined to the sheet made of sound absorbing material are appropriately determined depending on the installation location, etc.

As shown in FIG. 2, a substrate 2a made of plywood or the like, and a decorative veneer 2b having a wood edge pattern reinforced with resin.
By using a wooden piece 2 in which the two are integrally joined, it becomes possible to arrange a wood grain pattern on the floor surface using the obtained soundproof building material.

When a wood piece with a butthole pattern is made by cutting wood into rings, the wood fibers are cut into short pieces, so when dried, cracking, chipping, warping, etc. are very likely to occur. 1
．． When the thickness is about 0 to 10.0 ++n, cracks are more likely to occur because it is thin. Therefore, it is difficult to use such a wooden piece in the soundproof building material according to the present invention. However, as mentioned above, when decorative veneer with a wood edge pattern is reinforced with resin, cracks, chips, etc.
Wooden pieces, which are less likely to warp or curl and have good water resistance, can be used as soundproof building materials, for example, in the following way. The veneer is made by slicing hardwoods such as lauan, softwoods such as Japanese cypress, Japanese cypress, Japanese cypress, other logs, and square lumber into rounds.The thickness is 1.
It is preferable to set it as 0-10.0 mm. Next, the veneer is impregnated with a thermosetting resin such as polyester resin, melamine resin, or phenol resin by vacuum pressure impregnation. The amount of impregnation is preferably 100 to 120%. after this,
The veneer is adhered to a substrate such as plywood, and the impregnated resin is cured. After adhering the veneer to the substrate, it may be integrally molded with the sound absorbing material and the impregnated resin may be cured. It is preferable to use plywood as the substrate. Normally, plywood often has rough conduits, so the bonding (adhesion) of the wooden piece to the sound absorbing material is good.

Wooden pieces are not limited to square shapes;
It is also not necessary for the wooden pieces to be arranged parallel to the sheet of sound absorbing material, as shown in FIG. For example, rectangular wooden pieces may be laid and bonded to a sheet of sound absorbing material.

When using a wooden piece whose base is wider than the front side and integrally molding it with the sound absorbing material, the base of the wooden piece is joined to the sound absorbing material by applying a mold release agent to the base of the wooden piece, but it is not bonded. By doing this, it becomes possible to obtain a soundproof building material that includes wooden pieces that are difficult to peel off when installed, but can be removed from the sound-absorbing sheet as needed. You can easily replace only those that are damaged or worn out.By using wooden pieces with dovetail grooves on the back side, the wooden pieces can be firmly bonded to the sound-absorbing sheet. By impregnating sound-absorbing materials and cushioning materials with flame retardants, or by impregnating wood pieces with flame retardants, flame-retardant sound-proof building materials can be obtained. become.

Moreover, as shown in FIG. 2, on the end surface of the part of the wooden piece 2 that is to be joined to the sheet 3 made of sound absorbing material,
If a sheet 3 made of sound-absorbing material is provided with notches 5 that increase the distance between the wooden pieces 2 in the same area when spread, the notches 5 are filled with the sound-absorbing material and the wooden pieces 2 is less likely to come off from the sheet 3 made of a sound absorbing material.

The method for manufacturing soundproof building materials according to the present invention includes a step in which a predetermined number of wooden pieces are laid on one side of a sheet made of sound absorbing material and joined together (hereinafter referred to as step A), and a step on the other side of the sheet made of sound absorbing material. Any of the steps (hereinafter referred to as step B) in which a sheet made of a cushioning material is joined to the sheet may be performed first. Step A may involve, for example, adhesively bonding a predetermined number of wooden pieces by laying them on one side of a sheet made of sound-absorbing material. It is also possible to form a sheet and fit wooden pieces into the recesses.A box-shaped formwork with a flat bottom is used, liquid sound-absorbing material is poured into this formwork, and a predetermined number of pieces are placed on top of it. After laying the wooden pieces, the liquid sound-absorbing material may be cured. Alternatively, a box-shaped formwork may be used and a predetermined number of wooden pieces are laid at the bottom of the box-shaped form with the front side facing towards the back. (At this time, it is best to use a mold that prevents the sound-absorbing material from reaching the front side of the wooden piece even when the liquid sound-absorbing material is poured.) After that, it is also possible to pour the liquid sound-absorbing material and allow it to harden. , or other methods may be used. If step A is carried out using the second and fourth methods just described, it is possible to prevent the wooden piece from getting dirty with the sound absorbing material or adhesive. Step B is carried out, for example, by interposing an adhesive between a sheet made of a sound absorbing material and a sheet made of a cushioning material, and curing the adhesive at room temperature, or by other methods. The soundproof building material of the present invention may be made by a method other than this method.

In the soundproof building material of this invention, wooden pieces are spread and bonded to one side of a sheet made of sound absorbing material, and a sheet made of cushioning material is bonded to the other side of the sheet made of sound absorbing material. It has the effect of absorbing sound in the space that the front side faces, that is, it has a sound absorption effect, and it also has the effect of absorbing sound in the space that the front side faces.
It has the effect of blocking sound (for example, floor impact sound, etc.) that is transmitted to adjacent spaces (downstairs, one floor above, next room, etc.) through flooring, wall, ceiling, etc.), that is, it has a sound insulation effect.

Moreover, even if the surface to which it is attached has unevenness and is not flat (referred to as "uneven"), the sheet made of cushioning material absorbs the unevenness, so that the front surface of this soundproof building material becomes flat.

The soundproof building material of this invention is used as interior materials such as flooring materials, wall materials, ceiling materials, etc., but when used as a flooring material that is directly attached to the subfloor, in addition to the above effects, it provides a soft feeling when walking. As a result, it is possible to create a floor that is comfortable to walk on, where the sound of footsteps does not resonate much, and where impact noise does not resonate on the floor below (clears floor impact noise level 55).

Next, Examples and Comparative Examples will be shown.

(Example) A square wooden piece was prepared in which plywood with a thickness of 5.5 mm and a decorative veneer (thickness: 0.3+n) reinforced with resin and having a wood grain pattern were joined and integrated.

A box-shaped formwork with a flat bottom is used, and urethane rubber is used as the sound absorbing material.Liquid urethane rubber is poured into the formwork, and a prepared wooden piece is placed on top of it with a flat surface. After that, the liquid urethane rubber was cured, and the wooden pieces were spread and joined together on one side of the urethane rubber sheet. The thickness of the urethane rubber sheet was 3.2 am. Adhesive adhesive (Oshika Shinko II T
S-1) and a sheet made of polyethylene resin foam (manufactured by Lion Board UL. Thickness 3.0 mm.

A foaming ratio of 5 to 15 times, a closed cell structure, containing 1.0 to 5.0% by weight of a brown pigment colorant and calcium carbonate) is bonded, and the adhesive is cured at room temperature to adhere. 8 Qcmx 180cmX 12. A soundproof building material of O++n as shown in FIG. 1 was obtained.

(Comparative example) A box-shaped formwork with a flat bottom, the same as that used in the example, was used, and urethane rubber was used as a sound absorbing material, and liquid urethane rubber was poured into the formwork. After that, the same wooden pieces used in the example were laid on top of it in the same manner as in the example, and then the liquid urethane rubber was cured, and the wooden pieces were laid on one side of the urethane rubber sheet and joined. soundproof building materials (18
0 cm x 18 Q cm x 9. Q Dragon) was obtained. The thickness of the urethane rubber sheet was 3.2 mm.

When each of the soundproof building materials obtained in the Examples and Comparative Examples was applied to a concrete slab with a similarly uneven surface, it was found that the soundproof building materials of the Examples absorbed the unevenness of the concrete slab and had a flat surface. However, the comparative soundproof building material did not absorb the unevenness of the concrete slab very well, and the surface was not flat.

Further, each of the soundproof building materials obtained in Examples and Comparative Examples was attached to a concrete slab with a thickness of 150 mm, and the floor impact sound level was measured in accordance with JIS A 141B, and the results are shown in FIG. 4.

In addition, each of the soundproof building materials was attached to a concrete slab with a thickness of 180 μl, and the floor impact sound level was measured in accordance with JIS A 1418, and the results are shown in Figure 5. In both Figures 4 and 5, the horizontal axis shows the measurement frequency (Hz) on a logarithmic scale, the left vertical axis shows the floor impact sound level (dB) on an evenly spaced scale, and the right vertical axis shows the floor impact sound level (dB) on a logarithmic scale. Sound insulation grades are measured on a equally spaced scale. In both cases, A is an example,
B is a comparative example.

As shown in Figure 4, the thickness of the concrete slab is 15
Even though it is as thin as 0.01 m, the example has a sound insulation grade of L-65, while the comparative example has a poor rating of outside the grade. As shown in FIG. 5, the thickness of the concrete slab is 180 mm (thickness).The example has a sound insulation grade of L-55, while the comparative example has a poor sound insulation grade of L-65.

When I walked on each of the soundproof building materials used to measure the floor impact sound level, the material of the example gave a soft walking feeling, while the material of the comparative example gave a hard feeling of walking.

〔Effect of the invention〕

As seen above, the soundproof building material of the present invention has a sheet made of a sound absorbing material, on one side of which a predetermined number of wooden pieces are spread and bonded, and a sheet made of a cushioning material bonded to the other side. It has a large sound absorption effect and has the effect of increasing the transmission loss of impact sound. Even if the surface to which it is installed, such as the flooring, is uneven and uneven, the sheet made of cushioning material absorbs the unevenness. , the surface becomes flat.

The manufacturing method of the soundproof building material of the present invention includes a step in which a predetermined number of wooden pieces are spread and bonded on one side of a sheet made of sound absorbing material, and a sheet made of cushioning material is bonded to the other side of the sheet made of sound absorbing material. Therefore, it is possible to obtain a soundproof building material having the above-mentioned excellent effects.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the soundproof building material of the present invention, FIG. 2 is a sectional view of a portion thereof, FIG. 3 is a sectional view of a portion of a conventional example, and FIGS. Each figure is a graph showing the frequency characteristics of the floor impact sound level. ■...Soundproof building material 2...Wood piece 3...Sheet made of sound absorbing material 4...Sheet made of cushioning material Agent Patent attorney Takehiko Matsumoto Figure 2 Figure 3 Figure 4 Zhou Nianfu [Hz)

Claims (30)

[Claims] (1) A soundproof building material in which a predetermined number of wooden pieces are spread and joined on one side of a sheet made of sound absorbing material,
A soundproof building material characterized in that a sheet made of a cushioning material is joined to the other side of the sheet made of the sound-absorbing material. (2) Claim 1 in which the cushioning material is a foam
Soundproof building materials listed in section. (3) The soundproof building material according to claim 2, wherein the foam has an expansion ratio of 5 to 15 times. (4) The soundproof building material according to claim 2 or 3, wherein the foam has a closed cell structure. (5) The soundproof building material according to any one of claims 2 to 4, wherein the foam contains a pigment colorant. (6) The thickness of the sheet made of cushioning material is 2.0 to 5.
．． The soundproof building material according to any one of claims 1 to 5, which has a thickness of 0 mm. (7) The soundproof building material according to any one of claims 1 to 6, wherein the wooden piece is made by integrally bonding a decorative veneer to the surface of a substrate made of plywood. (8) The soundproof building material according to claim 7, wherein the decorative veneer has a wood grain pattern. (9) The soundproof building material according to any one of claims 1 to 8, wherein the wooden piece is made of reinforced wood. (10) The soundproof building material according to any one of claims 1 to 9, wherein the wood piece has a thickness of 1.0 to 20.0 mm. (11) The soundproof building material according to any one of claims 1 to 10, wherein the interval between the wooden pieces is 0.5 mm or more. (12) Claims 1 to 1, wherein the sound absorbing material is either soft rubber or soft plastic.
The soundproof building material according to any of Item 1. (13) The thickness of the sheet made of sound absorbing material is 3.0 to 20.
The soundproof building material according to any one of claims 1 to 12, which has a thickness of 0 mm. (14) The soundproof building material according to any one of claims 1 to 13, which is a flooring material that is used by being directly attached to a subfloor. (15) A soundproof building material comprising a step of laying and joining a predetermined number of wooden pieces on one side of a sheet made of sound absorbing material, and a step of joining a sheet made of cushioning material to the other side of the sheet made of sound absorbing material. manufacturing method. (16) The step of joining the sheet made of cushioning material to the other side of the sheet made of sound absorbing material involves interposing an adhesive adhesive between the sheet made of sound absorbing material and the sheet made of cushioning material, and 16. The method for producing a soundproof building material according to claim 15, which is carried out by curing an adhesive at room temperature. (17) The process of laying and joining a predetermined number of wooden pieces on one side of a sheet made of sound-absorbing material uses a box-shaped formwork with a flat bottom. 17. The method for manufacturing soundproof building materials according to claim 15 or 16, which is carried out by pouring the material, laying a predetermined number of wooden pieces thereon, and then curing the liquid sound absorbing material. (18) The process of laying and joining a predetermined number of wooden pieces on one side of a sheet made of sound-absorbing material uses a box-shaped formwork, and places a predetermined number of wooden pieces on the bottom of the box-like form with the front side facing the back. 17. The method for manufacturing soundproof building materials according to claim 15 or 16, which is carried out by laying down wooden pieces, pouring in a liquid sound absorbing material, and curing the material. (19) The method for producing a soundproof building material according to any one of claims 15 to 18, wherein the cushioning material is a foam. (20) The method for producing a soundproof building material according to claim 19, wherein the foam has an expansion ratio of 5 to 15 times. (21) The method for producing a soundproof building material according to claim 19 or 20, wherein the foam has a closed cell structure. (22) The method for producing a soundproof building material according to any one of claims 19 to 21, wherein the foam contains a pigment colorant. (23) The thickness of the sheet made of cushioning material is 2.0~
Claims 15 to 22 which are 5.0 mm.
A method for producing soundproof building materials as described in any of the paragraphs. (24) Claim 15, wherein the wooden piece is a decorative veneer integrally bonded to the surface of a substrate made of plywood.
A method for producing a soundproof building material according to any one of Items 23 to 23. (25) The method for producing a soundproof building material according to claim 24, wherein the decorative veneer has a wood grain pattern. (26) The method for producing a soundproof building material according to any one of claims 15 to 25, wherein the wood piece is made of reinforced wood. (27) The method for producing a soundproof building material according to any one of claims 15 to 26, wherein the wood piece has a thickness of 1.0 to 20.0 mm. (28) The method for producing a soundproof building material according to any one of claims 15 to 27, wherein the interval between the wooden pieces is 0.5 mm or more. (29) The method for producing a soundproof building material according to any one of claims 15 to 28, wherein the sound absorbing material is one of soft rubber and soft plastics. (30) The thickness of the sheet made of sound absorbing material is 3.0 to 20.
The method for manufacturing a soundproof building material according to any one of claims 15 to 29, wherein the thickness is 0 mm.