JPS63308150A - Soundproof composite floor 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 flooring material that provides good livability for residences, offices, and apartment complexes, and has an excellent effect of reducing floor impact noise.

(Prior art) Conventionally, foamed plastic flooring called cushion flooring, carpets, and tatami mats have been generally used on the floors of rooms such as living rooms and studies in apartment complexes, but the former lacks warmth, while the latter Because of this, there is a risk of dust mites occurring due to the moisture attached to the wood.
Alternatively, there is a tendency to use synthetic wood flooring with an excellent wood feel. In addition, in meeting halls, offices, school auditoriums, and other places where people often come and go, the parquet plywood, which has the high quality feel of wood, wear resistance, etc., or even surface hardness is required instead of vinyl tile sheets. Ceramic tiles, resin-containing concrete decorative tiles, etc. are used in these cases.

(Problems to be Solved by the Invention) However, when the above-mentioned parquet plywood or the like is used as a flooring material, it tends to generate tapping noise, that is, impact noise, and impact noise from above floors is a particular problem in apartment complexes. 1. For example, there is a construction method such as laying high-density glass wool as a sound absorbing material under the flooring material, but it is not effective in reducing impact noise and the construction is troublesome. In addition, flooring materials such as magnetic tiles and decorative concrete tiles with a small amount of resin make tapping noises caused by the heels of shoes when walking or jumping, and there is a need to reduce this.

(Preliminary measure to solve the problem) The inventors of the present invention have repeatedly studied ways to reduce the floor impact noise.
Although an improved soundproof flooring material has already been proposed in Japanese Patent Application No. 61-224004, etc., the present invention has been completed after further study to reduce floor impact noise. That is, the gist of the present invention is that when laminating a viscoelastic material on one or both sides of a wooden board or between a plurality of wood boards, at least 4 pieces of the wood board are coated on one or both sides in the thickness direction of the board. Cuts with a depth of 10 to 75% of the thickness are provided at predetermined intervals, and the density is 50 to 2001 Q/, 3. The present invention relates to a soundproof composite flooring material formed by pasting a fibrous material having a thickness of 5 to 150 mm.

The present invention will be explained below based on the accompanying drawings.

1 to 7 are partially enlarged sectional views showing embodiments of the flooring material according to the present invention. Figure 1 shows two wooden planks 1.1
A viscoelastic material 3fC is inserted between the holes 1 and 2, and a fibrous material 4 is pasted on the lower surface (floor side) of the composite board, which is made by making cuts 2 on one side of the upper board. In relation to this, Figure 2 shows the flooring shown in Figure 1 with cuts 2 also in the lower wooden board 1.
Fig. 3 shows a wood-based board 1 with cuts 2 on one side, and Fig. 4 shows a composite board with viscoelastic material 3 laminated on both sides. This relates to a flooring material formed by applying substance 4. Incidentally, a decorative surface material 5 may be adhered to the upper surface of the present soundproof composite flooring material as shown in FIG. 5. The floor material shown in FIGS. 6 and 7 is formed by making cuts 2 on both sides of a single wooden board 1. There are no fancy illustrations.

The soundproof composite flooring may be made with other block configurations as long as it does not contradict the purpose of the present invention. Also, depending on the cutting density, it is generally better to install soundproofing on both sides of a wooden board (it is better to install it on one side), and to install it on the upper and lower boards of a composite board than when the second son installs it on only one board. Performance is improved.

The wood-based board 1.1' shown in this embodiment is, for example, a single-layer board 1.
May be plywood, ・9-Wood-based materials such as tickle gates
It may also be an aMI board or the like. The thickness is determined based on the depth of the cut, the density, the rigidity of the composite board due to lamination with the viscoelastic material, the impact sound damping properties, etc. for those with a cut 2, or 4 to 30, preferably 5 to 30. About 10 proverbs are used. If the thickness is less than 4W, it will be difficult to make cuts with effective soundproofing performance.In general, the rigidity of the floor will be insufficient, while if the thickness is 30W or more, the vibration distribution due to the viscoelastic material will be insufficient. It is difficult for the effect to appear,
Therefore, it becomes difficult to make the loss coefficient of the composite plate material equal to or higher than O, OS, and the effect of reducing floor impact noise cannot be obtained, which is not preferable. Furthermore, in the case of wood-based boards without notches, wood having a thickness of about 2 to 15 mm is preferably used.

The materials of the upper plate and the lower plate may be the same, or may be a combination of different materials.

The cuts to be made in the wood-based boards are made on one side of at least one of the boards (Figs. (Fig. 7), or each of a plurality of plate materials (
(Figures 2 and 7) Good.

The depth of the cut is 10 to 75%, preferably 25 to 50% of the thickness of the plate. Depth of cut is 10%
If it is less than 75%, it will be difficult to achieve the purpose of the present invention which aims to improve floor impact noise by providing notches, and if it is more than 75%, it will cause problems in maintaining the strength of the flooring material when a load is applied. Either way, it's not preferable.

The cuts may be made at predetermined regular intervals in the vertical or horizontal direction of the surface of the wooden board, or may be provided at irregular intervals.

Further, the cuts may be provided in a grid pattern vertically and horizontally, and these cuts may be provided not only in straight lines but also in dotted lines, broken lines, curved lines, etc. The predetermined interval is preferably 10 to 500 m. This is to keep in mind that if it is less than 10 m, the density of the cuts will be too high, depending on the depth of the cuts, and the strength of the wood board will be poor, and if it is more than 500 meters, the soundproofing effect of the cuts will not be expected.

Note that the cut may be formed with a groove width of about the same as a typical sawtooth (it may be formed in a U-shape, V-shape, concave shape, etc., but the width of the cut may be 1 to 5 mm at its maximum part). Provided in degrees.

The effect of this cut is to reduce impact noise in the low frequency range, which has been considered difficult in the past, and is to reduce the floor impact sound level by moving or dispersing the resonance that occurs in the wood board.

In other words, in general, the light impact sound of a wooden floor set on a concrete slab often has a peak at a frequency of 125,250 Hz when frequency analysis is performed in an octave band. By lowering the apparent rigidity of the plate material and partially changing it, the resonant frequency is moved and then dispersed, and the 125,250
This is a lick that reduces the floor impact sound level at Hz.

When the viscoelastic body 3 is inserted between the intermediate layers of a plurality of wood boards, a material with low elasticity and high tan δ is used, and it is placed on one or both sides of the wood boards. When J is used, it is preferable to use a material with high elastic modulus and high tan δ. In other words, although the mechanism that exerts vibration damping properties is different in each case, in order to expect impact sound attenuation effects as a soundproofing composite flooring material, the loss coefficient of the composite board material due to the lamination of the wood board material and the viscoelastic material is important. must be 0.05 or more.

In order to satisfy these conditions, the thickness of the viscoelastic material must be different when it is inserted into the middle layer of multiple wood planks and when it is laminated on one or both sides of the wood planks. However, in the former case, a thickness of about 0.25 to 3.0 m, preferably about 0.5 to 1.5 m, is used. If the thickness is less than 0.25 m, the loss coefficient of the composite plate material will not be effectively expressed, and therefore floor impact sound cannot be effectively attenuated. When the thickness is 3.0cm or more, it becomes a viscoelastic material, but under high temperatures such as under direct sunlight in summer,
It is not preferred as a flooring material because it may flow from the joints when a large load is applied to the floor.

Furthermore, in the latter case, although it depends on the material and thickness of the wood-based board, in order to make the loss coefficient of the composite board 0.05 or more, a viscoelastic material with a thickness of 1 or more is usually used. It is preferable. Further, when the thickness is 5 m or more, depending on the material, in addition to the vibration damping effect, effects such as mass and acoustic impedance ratio are also expressed.

Examples of materials for such a viscoelastic body include ptylated rubber,
Synthetic rubbers such as SBR and NBR and synthetic resins such as polyvinyl chloride are used, and various oils and plasticizers are used to adjust elasticity, t+Lnδ, etc. to meet the purpose.

A sheet formed by adding fillers and the like is used.

In addition, adhesive is usually used to layer this viscoelastic material between multiple wood-based boards or on one or both sides of wood-based boards, but the viscoelastic material itself does not change economically. It is not necessarily necessary to use an adhesive as long as it has self-adhesive properties.

The fibrous material 4 used in the present invention has a density of 50 to
200kl? /m3, thickness 5-150m.

Preferably, those in the range of 10 to 100 pieces are used.

If the density is less than 50 kg 7 m'', the general spring constant will be low, depending on the thickness K, and it will not be able to maintain its physical properties as a floor, resulting in instability when walking, subsidence when installing heavy objects, etc. Problems such as durability will arise.Also, if the density is 20
When the weight exceeds 0 kg/1ts3, the hard material becomes hard, and when it is laid as a floor, the spring constant becomes high and the floor impact sound level is reduced, although this also depends on the thickness and the material of the fiber. It becomes impossible to reduce the amount.

Furthermore, its thickness is 5 to 150 m, preferably 10 to 1
Used in 00-. The range of this thickness is the same as the density above, and it also depends on the material and density, but if the thickness is less than 5cm, the spring constant is too high and floor impact noise cannot be effectively reduced. On the other hand, if it exceeds 150 mm, it is not preferable because it will cause a feeling of instability when walking and problems with the physical properties of the floor.

The fibrous materials used in the present invention include inorganic FR fibers such as glass wool and rock wool.

Nylon, f! Examples include synthetic fibers such as realester, acrylic, and rayon, and natural fibers such as cotton and linen, but the types thereof are not limited.

Moreover, the above-mentioned fibers may be used alone, or two or more types of fibers may be used in combination.

Furthermore, the soundproof flooring material according to the present invention may be used as a practical or decorative flooring material by pasting a decorative surface material 5 on its surface as shown in FIGS. 5 to 7. .

Such decorative surface materials are selected from parquet plywood, hegi board, cedar decorative plywood, various veneer boards 1 synthetic wood, ceramic tiles, etc.
A hard material with a thickness of usually about 0.2 to 5 cm is preferably used.

Note that the soundproof composite flooring material according to the present application may be a structure formed by laminating these constituent materials in advance, or may be a structure formed by laminating each of these constituent materials on-site. Good too.

(Example) The present invention will be described in more detail with reference to Examples below.

Example 1 A viscoelastic body made of a butyl rubber sheet with a thickness of Im, a plywood of JAS standard type 1 with a thickness of 3 cm on the lower surface, and a plywood with a thickness of 5.2 mm on the upper surface.
At m, U-shaped notches with a depth of 2 tm are formed in a lattice pattern in the longitudinal direction at equal intervals of 50 mm on the surface facing the viscoelastic body 7'
j A composite board was created by laminating JAS standard 1 type plywood with adhesive. The loss coefficient of this composite plate material was determined to be 0.25 based on the resonance half width of the mechanical impedance. Furthermore, rock wool with a density of 125 klil/m'' and a thickness of 15+W was pasted on the bottom surface of this composite board (the side of the plywood without notches), and a decorative surface material made of 0.25 sardine veneer board was pasted on the top surface. Then, a soundproof composite flooring according to the present invention as shown in FIG. 5 was formed.

Next, No. 8 simulated a concrete apartment complex.
A two-story, Tux-shaped concrete room with a floor area of 2,680 x 3,580 square meters was constructed as shown in the cross-sectional view of the figure, and the soundproof composite flooring material according to the present invention was applied to the upper surface of the concrete floor on the first floor without any gaps. It was laid down. 1st floor floor l)1
A microphone is installed at a height of 200m, and JIS A
1418 (Method for Measuring Floor Impact Sound Level at Building Sites) Impact noise from a tapping machine from above the floor was measured in accordance with K. The measurement results are shown in Table 2.

Example 2゜Molded by mixing iron powder etc. with a thickness of 3sw+, U-shaped notches with a depth of 4cm were made in the vertical direction only at equal intervals of 100cm on the surface that would become the soft polyester side. A composite board was created by laminating plywood with adhesive. The loss coefficient of this composite board material was 0.23. Furthermore, rock wool with a K density of 125 kg/m'' and a thickness of 25 mm was pasted on the lower temperature vinyl surface of this composite board (Nachi key is the sheet surface), and the same decorative surface material as in Example 1 was pasted on the top surface. A soundproof composite flooring material according to the present invention was formed.

Similar to Example 1, this soundproofing composite flooring also meets JIS A standards.
1418, the impact noise from the tapping machine from upstairs was measured. The measurement results are shown in Table 2.

Comparative Example 1 The same rock wool as in Example 1 was laminated on the lower surface of a Class 1 plywood board having a thickness of 8 days, and the same decorative surface material as in Example 1 was laminated on the upper surface to form a flooring material. The loss coefficient of the plywood portion of this flooring material was determined to be 0.01.

As with Example 1, JIS A1418 was also used for the wooden flooring material.
Impact sound was measured using a tapping machine based on the above. The results are shown in Table 2.

Comparative Example 2゜In Comparative Example 1, instead of rock wool, J
A natural rubber sheet with an IS hardness of 80 was adhesively laminated to plywood to form a flooring material.

As with Example 1, this flooring material also complies with JIS A 141.
The impact sound was measured using a tapping machine based on 8. The results are shown in Table 2.

Comparative Example 3: Impact noise was also measured using a tapping machine based on JIS A 1418, which can be washed in the case of only a concrete floor (150 am thick). The results are shown in Table 2.

Comparative Example 4 In Example I, the depth of the notch provided in one plywood was 4
．． A flooring material was formed in the same manner except that the thickness was changed to 5■ (86.5% of the board thickness). This flooring material is laid on the top surface of the concrete floor shown in Figure 8 and weighs approximately 60kl. When a human walking test was conducted, many cracks appeared in the notched plywood after a few minutes.
A similar walking test was conducted on the nine soundproof composite floorings formed in Examples 1 and 2 for comparison, but no cracks were observed.

Table 1 shows a summary of the constituent materials used in the Examples and Comparative Examples and their thicknesses.

1st Umbrella mark is plywood with notches (unit: simple)
Shown in the table.

Table 2 As shown in Table 2, in Comparative Example 3, which uses only a bare slab, the sound insulation grade of the floor according to the Architectural Institute of Japan standards is L-85, while in Comparative Example 2, which uses a rubber sheet, the sound insulation grade is L-85. -7
0, and in Comparative Example 1 using a fibrous material, the sound insulation grade was improved to L-65.1 The sound insulation composite flooring material according to the present invention had a sound insulation grade of L-55 in both Examples 1 and 2. has been significantly improved.

(Effects of the Invention) As explained above, the soundproof composite flooring material according to the present invention is particularly suitable for use in concrete and ALC flooring materials, and is suitable for use with glass wool and rock wool, which have been conventionally used as floor impact noise prevention structures. The construction period is shorter compared to dry floating floor structures such as wet floating floor structures such as ma, -'mblock, and fmpat, and the waving of the concrete surface can be absorbed by the action of the fibrous material, and the high frequency range is Of course, the present invention has features such as being able to effectively reduce the floor impact sound level over a wide frequency range including the low frequency range, which has been considered difficult in the past.

[Brief explanation of the drawing]

1 to 7 are partial sectional views showing examples of the soundproof composite flooring material according to the present invention, and FIG. 8 is a longitudinal sectional view of a box-shaped room in which a floor impact sound test was conducted. In the figure, 1.1' indicates a wooden board, 2 indicates a notch, 3 indicates a viscoelastic material, 4 indicates a fibrous material, and 5 indicates a decorative surface material. Patent applicant: Zeon Corporation Zeon Kasei Co., Ltd. No. 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. When laminating a viscoelastic material on one or both sides of a wood-based board or between a plurality of wood-based boards, 10 to 75% of the thickness in the thickness direction of at least one of the wood-based boards is applied to one or both sides of the wood-based board. Fibers with a density of 50 to 200 kg/m^3 and a thickness of 5 to 150 mm are coated on one side of a composite plate material formed by making cuts with a depth of A soundproof composite flooring material characterized by being made by pasting a similar substance.