JPS63308153A - Soundproof laminated 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 <Industrial Field of Application> The present invention relates to a flooring material that provides good livability for residences or offices, particularly apartment complexes, and has an excellent effect of reducing floor impact noise.

<Conventional technology> Conventionally, the floors of rooms such as living rooms and studies in apartment complexes have generally been constructed with foamed glass flooring, carpets, carpets, and tatami mats, for example. The former lacks warmth, while the latter is damp and has the risk of attracting dirt and dust mites.For this reason, for example, parquet plywood for oak flooring, decorative plywood for decorative plywood such as cherry wood with beautiful grain, etc.
Alternatively, there is a tendency to use synthetic wood with a superior wood feel. In addition, in place of meeting places, offices, school auditoriums, etc., where many people come and go, parquet plywood can be used as an alternative to vinyl tile sheets in terms of the high quality feel of wood, wear resistance, etc., and also the surface hardness required. In some cases, ceramic tiles and resin-filled concrete decorative tiles are also used.

<Problems to be solved by the invention> However, when the parquet plywood etc. mentioned above 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. For example, there is a fly method, such as laying a density glass wall as a sound absorbing material under the flooring material, but it is not effective in reducing impact noise and is cumbersome to install. However, flooring materials such as magnetic tiles and resin-containing concrete decorative tiles make loud tap and ping noises caused by shoes when walking or jumping, and there is a need to reduce this noise.

<Means for Solving the Problems> The present inventors have repeatedly studied various acoustic materials and combination structures thereof as a method of reducing impact noise on the floor, and have finally arrived at the present invention.

That is, the gist of the present invention is that the thickness in the thickness direction is 10 to 75L.
Synthesis on one side of a composite board made by laminating a viscoelastic material on one or both sides of a wood-based board with cuts of depth s made at predetermined intervals on at least one side so that the loss coefficient is 0.05 or more. Alternatively, the present invention relates to a soundproof laminated flooring material characterized by pasting a three-dimensional network structure formed by intertwining natural fibers or metal filaments.

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

Figure 1 shows 19r of an embodiment of the soundproof laminated flooring material according to the present invention.
It is a plan view, in which a wooden board 1 is laminated on the upper surface of a viscoelastic body 3, and a three-dimensional network structure 4 is laminated on the lower surface, and a notch 2 of a predetermined depth is formed on the surface of the wooden board on the viscoelastic body side. are formed at predetermined intervals.

This floor material may be constructed by pasting a decorative surface material 5'f on its upper surface as shown in FIG. Fig. 3 shows a structure in which notches 2 are bored on both sides of a wooden board l.

The wood-based board 1 may be, for example, a single-layer board, plywood, or a wood-based fiberboard such as a particle gate.

The plate thickness is determined based on the notch spacing density, depth, the rigidity and impact sound damping properties of the composite plate made by laminating 3 tons of viscoelastic material, but it is usually about 2 to 15+ m, preferably about 4 to 101 IIE. things are used. If the thickness is less than 2B, it will generally lack the rigidity as a floor, although it depends on the effect of the depth of cut.
m or more, although it depends on the characteristics of the laminated viscoelastic bodies, it generally becomes difficult for the viscoelastic bodies to exert their distribution effect, and as a result, the effect of reducing floor impact noise appears and becomes steeper. I don't like it.

The cuts 2 made in this wooden board may be made only on one side as shown in FIG. 1, or may be made on both sides as shown in FIG.

The depth of the cut is in the range of 10 to 75 inches, preferably 25 to 50 meters, of the thickness of the wood board. If the depth of cut is less than 10 inches, the effect of the cut will not be realized, and if it is more than 75 inches, it will generally result in a decrease in strength when a load is applied, although it depends on the thickness of the wood board. It is unfavorable in terms of physical properties as a floor.

The cuts may be made in either the vertical or horizontal direction of the surface of the wood board, or may be in the form of a grid that intersects vertically and horizontally. The edge shape may also be a broken line or a white piece, and it is preferable that the interval between the cuts is 10 to 500+g *If it is less than 10fi, the cut density will be high, depending on the depth of the cut, and the strength will be increased. If it is 5,000 or more, the cutting effect, which will be described later, is hardly produced. Note that the notches may be arranged at equal intervals or at irregular intervals.

The width of the cut should be about 0.5 to 50, and if it is more than 50, the vibration damping effect of the floor material will decrease. Further, the cross-sectional shape of the cut may be U-shaped, V-shaped, or concave, and the cut can move or disperse the resonance of the wooden board and reduce the floor impact sound level due to resonance. In other words, in general, the light impact sound of a wooden floor installed on a concrete slab is 1 when frequency analysis is performed in an octave band.
In many cases, it has a peak at frequencies of 25 Hz and 250 Hz, but by making cuts in the wood board, the apparent stiffness of the board can be lowered or partially changed to move or disperse the resonant frequency. , 125Hz
This is because the floor impact sound level at , 250Hs is reduced.

The viscoelastic body 3 usually has a shear modulus of 10' dyn/cIg? at 100 Hz. The above are used.

In other words, in order to expect an impact sound attenuation effect as a soundproof flooring material, it is necessary that the loss coefficient of the wooden board material for the floor be 0.05 or more. Then, the shear modulus needs to be 10'dyn/- or more. Further, the larger the −δ of the viscoelastic body, the more preferable it is, but it is preferable if −δ>0.5.

The thickness of such a viscoelastic body depends on the type and thickness of the wood-based board material, the elastic modulus of the viscoelastic body, and the value of 1 ctuδ, but it is usually 1 or more, preferably 1.5 to 5. A level of about On is used. When the thickness is 1n or less, it is difficult to make the loss coefficient more than 0.05, although it depends on the type and thickness of the wood board. If the thickness is more than Otx, depending on the thickness of the plywood, the thickness of the splitting material may be thicker than the wood-based board material, and the characteristics of the wood-based material may be lost.

Materials for such viscoelastic bodies include butyl rubber, SB
Synthetic rubber such as R%NBR, synthetic resin such as polyvinyl chloride, etc. are used, and various oils, plasticizers, fillers, etc. are blended so that the elastic modulus, -δ, etc. meet the purpose. The one formed is used.

In addition, adhesives are usually used to laminate and fix this viscoelastic body between wooden boards, but if the viscoelastic body itself has self-adhesive properties that do not change over time, this is not necessarily the case. No need to use adhesive.

The three-dimensional network structure 4 used in the present invention is a three-dimensional network structure made by three-dimensionally intertwining relatively rigid synthetic resin filaments or similarly rigid natural fiber filaments, and the non-resonant A structure showing a value of 70 N1011t-1 or less at room temperature using a dynamic stiffness tester at a forced vibration shop is preferable, and the lower this value is, the better. -cns or more, the effect of alleviating impact noise will not be sufficient.

Examples of the material of the three-dimensional network structure satisfying 70 N/-1 of the present invention include nylons such as 6-nylon and 66-nylon, polypropylene, hard, #! - Rigid polyvinyl chloride, polyacetal, polyester resin filaments. Filaments made of low-density polyethylene, ethylene/vinyl acetate copolymer, ABS resin, rubber-modified polystyrene, etc. lack a stiffness of 1, so only three-dimensional network structures consisting of a certain range are included. Additionally, a certain range of natural fibers such as fibers, fural, palm, etc. can be utilized as three-dimensional network structures that fall within the numerical values of the present invention. However, if fiber wire is used in housing complexes, which have high natural rigidity, there is a risk of insufficient ventilation, which may encourage the growth of dust mites, or a decrease in strength due to strong alkaline moisture. It is preferable to take measures such as resin impregnation treatment before use. Metal filaments have a similar effect, but iron filaments are prone to rust, and aluminum and bronze are susceptible to impact stress.
Since the material yields to the static load iK and loses its elasticity, a material with a large spring constant such as stainless steel or special steel is preferable.

These three-dimensional network structures, which are formed into a rough mat shape by intertwining filaments as described above, have a large porosity and appropriate elasticity, are highly effective in absorbing vibration energy, and are similar to concrete. Slab waving (Frik)
It also has the effect of absorbing '5c. The thickness of the filament varies depending on the material, but the structure is 70N/6I.
Since it has a physical property value equal to or less than P.tan, a diameter of K of 0.2 to 3 φ is usually used. If it is thinner than this, no matter how dense the network structure is, it will be deformed by the load or impact and no vibration damping effect will be achieved.If the diameter is 3u or more, it will be too rigid and will not behave in a way that dampens impact noise. The thickness of this three-dimensional network structure, which includes many materials not shown, is preferably in the range of 3 to 20 layers at room temperature and in the open without any load (in the atmosphere).

The impact noise reduction effect of pink etc. is poor, and even if the distance is 20 m or more, the impact noise reduction effect does not increase to that extent, resulting in cost reduction and problems such as an increase in the amount of floor sinking when a load is applied. This is because it causes

In addition, as mentioned above, this three-dimensional network structure is coated with non-woven or woven fabric on one or both sides to improve adhesion to wood-based boards or floor slabs or to reinforce the three-dimensional network structure itself. can be used by stacking them.

Furthermore, as shown in FIGS. 2 and 3, a decorative surface material 5 may be attached to the bow side of this soundproof flooring material to make it a decorative or decorative flooring material.

Such decorative surface material 5 is selected from parquet plywood, hegi board, plywood decorative plywood, various veneer boards, synthetic wood, ceramic tiles, etc., and is preferably made of a hard material with a thickness of usually about 0.2 to 5 rugs. used for.

Note that the soundproof laminated flooring material according to the present invention 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.

<Effects of the Invention> The soundproof laminated flooring material according to the present invention obtained in this manner is particularly suitable for concrete-based and ALC-based flooring materials, and is superior to glass wool, which has conventionally been used as a floor impact noise prevention structure. , mouth, wet floating floor structure such as fural, rubber block,
Compared to dry floating floor structures such as rubber bats, the construction period is shorter, the three-dimensional network structure can absorb undulations on the concrete surface, and it has a wide frequency range, not only in the high frequency range but also in the low frequency range, which was previously considered difficult. It has features such as being able to effectively reduce the floor impact sound level over the area.

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

Example 1 A polyvinyl chloride vibration damping sheet (trade name: Sunmem DM, manufactured by Zeon Kasei) formed by mixing iron powder with a thickness of 2fi was formed on the top surface of a viscoelastic body, and the viscoelastic body side and the viscoelastic body side were coated with a thickness of 8fi. A composite board material was formed by adhesively laminating plywood of JAS standard type 1, which had U-shaped notches with a depth of 2 mm arranged in a lattice pattern in the longitudinal direction at equal intervals of 50 m on the surface. When the loss coefficient of the composite plate was calculated by the resonance half width of the mechanical impedance, it was found to be 0.
．． It was 09. Furthermore, on the lower surface (viscoelastic body side) of this composite plate, a three-dimensional network structure with a thickness of 8 nm and a dynamic spring constant value of 65 N/cal formed from K nylon filaments (trade name: Zeosonic TP, Zeon chemical cracking A soundproof laminated flooring material according to the present invention as shown in FIG. 2 was formed by pasting a decorative surface material made of a veneer board with a thickness of 0.25 m on the upper surface.

Next, the fourth building, which is a concrete housing complex, was built.
A two-story building with a floor area of 2,680 x 3,580 square meters, with the structure shown in the cross-sectional view of the figure. A box-shaped concrete arrow room was created, and the soundproof laminated flooring material according to the present invention was laid on the upper surface of the concrete floor on the upper floor without any gaps. 1st floor above floor level 5
A microphone was installed at a height of 1200m, and JIS A
1418 (method for measuring floor impact sound levels at building sites), impact noise from a tapping machine from above the floor was measured.

The measurement results are shown in the second garment.

Example 2 In Example 1, the thickness of the polyvinyl chloride damping sheet was 3m1m, and the notch provided in the plywood was 4tm deep.
A soundproof laminated flooring material according to the present invention was formed with the same configuration except that they were provided at equal intervals of 100 m only in the vertical direction. Regarding the soundproof SM flooring material according to this example, which measured the coefficient and found it to be 0.18, JISA 141 was also used in the same manner as in Example 1 using the room shown in Figure 4.
Based on Section 8, the impact noise from the tapping machine from above was measured. The measurement results are shown in Table 2.

Comparative Example 1 The same three-dimensional network structure as in Example 1 was laminated on the lower surface of JAS Standard Class 1 plywood (without notches) with a thickness of 8 m, and the decorative surface material made of the same plywood as in Example 1 was layered on the upper surface. The loss coefficient of the plywood portion of the 0-piece flooring material that was laminated to form the flooring material was determined to be 0.01.

As for this flooring material, KJIS A 141 is used as in Example 1.
Impact sound was measured using an 8-nimoto tapping machine. The results are shown in Table 2.

Comparative Example 2 In Comparative Example I, a thickness of 8 m was used instead of the three-dimensional network structure.
A flooring material was formed using a natural rubber sheet with a JIS hardness of 80.

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 the second technique.

Comparative Example 3 Concrete floor (thickness 150 mm) in the room shown in Figure 4
Impact sound was also measured using a tapping machine based on JIS A 1418 in the case of only ++a).

The results are shown in Table 2.

Comparative Example 4 In Example 1, the depth of the notch provided in the plywood was 7
Example 1 except that tyi (plate thickness of 87.5 mm)
A flooring material was formed in the same manner.

When this flooring material was laid on the top surface of the concrete floor shown in Figure 4 and a walking test was conducted with a person weighing 60 yen, many cracks appeared after a few minutes, mainly at the notched parts of the plywood and board. It became unbearable to use.

For comparison, a similar walking test was conducted on the soundproof laminated flooring materials formed in Examples 1 and 2, but no cracks were observed.

A summary of the constituent materials and their thicknesses of the Examples and Comparative Examples is shown in 1st ff.

Next, Table 2 shows the measurement results of each floor impact sound of the examples and comparative examples.

Table 2 As shown in Table 2, Il! Comparative Example 3K with Nu5P only, the sound insulation grade of the floor according to the Architectural Institute of Japan standards is L-85, whereas in Comparative Example 2, the sound insulation grade is L-70, and a comparison using a three-dimensional network structure. In example 1, the sound insulation class is L.
However, the sound insulation grade of the sound insulation laminated flooring material according to the present invention is significantly improved to L-55 in both Examples 1 and 2.

[Brief explanation of the drawing]

1 to 3 are partial cross-sectional views showing examples of the soundproof laminated flooring material according to the present invention, and FIG. 4 is a vertical cross-sectional view of a Gex-shaped room in which a floor impact sound test was conducted. In the figure, 1 indicates a wooden board, 2 indicates a notch, and 3 indicates a three-dimensional network structure. Patent applicant: Nippon Zeon Co., Ltd. Zeon Kasei Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A viscoelastic material is laminated on one or both sides of a wood-based board with cuts at a depth of 10 to 75% of the thickness at predetermined intervals on at least one side in the thickness direction to achieve a loss coefficient of 0.05 or more. 1. A soundproof laminated flooring material, characterized in that a three-dimensional network structure formed by intertwining synthetic or natural fibers or metal filaments is attached to one side of a composite plate material formed to have the following shape.