JPS62253867A - Soundproof 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 a residence or office, particularly an apartment complex, and has an excellent effect of reducing floor impact noise.

(Prior art) Conventionally, the floors of living rooms, studies, and other living rooms in apartment complexes have been generally covered with foamed glass flooring, known as side-lit cushion floors, carpets, and tatami mats. If the latter is insufficient, it may become damp and dust may adhere to it, leading to house dust mites.
Alternatively, there is a tendency to use synthetic wood with a superior wood feel. In addition, in high-traffic areas such as meeting halls, offices, and school auditoriums, the above-mentioned parquet plywood or even surface hardness is required in place of vinyl tile sheets in terms of the luxurious feel and abrasion resistance of wood. Ceramic tiles and resin-filled concrete decorative tile surfaces are also 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. For example, there are construction methods such as laying high-density glass wool as a sound absorbing material under the flooring material, but these are not effective in reducing impact noise and are cumbersome to install. However, flooring materials such as magnetic tiles and resin-containing concrete decorative tiles produce a loud tapping sound from the heels of shoes when walking or jumping, and there is a need to reduce this noise.

(Means for Solving the Problems) The present inventors have conducted various studies on methods for reducing impact noise on the floor by combining cushioning materials, vibration isolating materials, and camera control materials, and have A flooring material is used in which a three-dimensional network structure is laminated to the 9-9 side of a wooden board material in which a viscoelastic material having a shear modulus of elasticity at 100 Hz of 105 to 108 dyne/m2 is arranged in a sandwich-like manner. The present inventors have discovered that an excellent impact sound reduction effect can be achieved by doing so, and have completed the present invention.

That is, the gist of the present invention is to laminate wood-based boards on both sides of a viscoelastic body with a shear modulus of 105 to 108 dyn 7 cm" at 100 Hz, and to intertwine metal filaments or synthetic or natural fibers on at least the - side of the board. This invention pertains to soundproof flooring material formed by pasting a nine-dimensional mesh structure into a shape.

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

FIG. 1 shows an embodiment of the soundproof flooring material according to the present invention, in which wood-based boards 1.1' are laminated on both sides of a viscoelastic body 20, and a three-dimensional network structure is formed on the board surface on the floor side. It is constructed by pasting 3.

In addition, as shown in Fig. 2, a decorative surface material 4 is provided on the front side of the board material.
It may also be configured by pasting (i @ As shown in Figures 3 and 434, between the plate material 2' and the three-dimensional network structure (Figure 3)
Furthermore, a woven or nonwoven fabric 5 may be attached to both sides of the three-dimensional network structure (FIG. 4).

The wood-based board material 1.1' may be, for example, a single-layer board, plywood, or a wood-based fiberboard such as particle board. The thickness is determined based on the rigidity and impact sound attenuation characteristics of the composite plate with the viscoelastic body 2 interposed therebetween, but it is usually about 2 to 15 watts, preferably about 3 to 10 watts. If the thickness is 2 or less, the rigidity of the floor will generally be insufficient, although it depends on the rigidity of the other board.On the other hand, if the thickness is 15W or more, this will also be insufficient. Although it depends on the characteristics of the viscoelastic body inserted,
In general, it becomes difficult for the vibration damping effect of a viscoelastic body to be expressed,
As a result, it becomes difficult to achieve the effect of reducing floor impact noise, which is undesirable.

Further, the materials of the upper plate material and the lower plate material may be the same or a combination of different materials, and may be determined depending on the use and purpose.

The viscoelastic body 2 has a shear modulus of 10 at 100 Hz.
It is necessary to use a material in the range of 5 to 108 dyn/m. In other words, in order to expect an impact sound attenuation effect as a soundproof flooring material, the loss coefficient of the wood flooring material must be 0.05 or more. For this purpose, the shear modulus must be set at 105 to 10 dyn/c-
It needs to be within the range. Further, the larger the tan δ of the viscoelastic body is, the more preferable it is, but it is suitable if tan δ>0.5. Furthermore, by setting the shear modulus at a frequency of 100 Hz within the above range of 10 to 10 dyn/crs, it is possible to reduce the frequency of 63 to 250 Hz, which is a particular problem with floor impact noise.
This means that soundproofing measures can be effectively obtained in the low frequency range of .

The thickness of such a viscoelastic body is usually about 0.25 to 3.0 mm, preferably about 0.5 to 1.5 wm. When the thickness is less than 0.25, the loss coefficient of the composite wood board material is not effectively expressed, and therefore floor impact sound cannot be effectively attenuated. 9, the thickness is 3. If it exceeds Otm, it is preferable as a flooring material because it is a viscoelastic material and may flow from the joints under high temperatures such as under direct sunlight in the summer or when a large load is applied to the floor. do not have.

Materials for such a viscoelastic body include butyl rubber, S
Synthetic rubbers such as BR and NBR and synthetic resins such as polyvinyl chloride are used, and various oils, plasticizers, fillers, etc. are blended to adjust the elastic modulus, tan δ, etc. for the purpose, and the material is made into a sheet. Formation and thoughts are used.

In addition, adhesives are usually used to secure this viscoelastic material between wooden boards, but the viscoelastic material itself has a self-adhesive property that does not change over time. It is not always necessary to use adhesive.

The three-dimensional network structure 3 of the present invention is a three-dimensional network structure made by three-dimensionally intertwining synthetic resin filaments with relatively high monotony or filaments of similarly rigid natural fibers. It is preferable that the structure exhibits a value of 7 ON/ro2·m or less at room temperature using a strong vibration type dynamic stiffness tester, and the lower this value is, the better. This value is 7
This is because if the value exceeds ON/crtt"·G, the effect of alleviating impact noise will not be sufficient.

Materials for the network structure satisfying 7ON/cm"・α of the present invention include nylons such as nylon 6 and nylon 66;
High-medium density? Examples include filaments of polyethylene, polypropylene, rigid and semi-rigid polyvinyl chloride, polyacetal, and polyester resins. Filaments made of low-density polyethylene, ethylene/vinyl acetate copolymer, ABS resin, rubber-modified polystyrene, etc. lack "stiffness" and therefore include only a three-dimensional network structure consisting of a certain range.

Also, certain ranges of stiffness among natural fibers such as rock wool, gnome, etc. may be utilized as the network structure within the numerical values of the present invention. However, when natural, highly rigid fibers are used in housing complexes, 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. Metal filaments have a similar effect, but iron filaments are prone to rust, and aluminum and bronze yield to impact stress and static loads and lose their elasticity.
A material with a large spring constant, such as stainless steel or stainless steel, is preferable.

These network structures are formed into a rough mat shape by intertwining filaments as described above, and have a large porosity and appropriate elasticity, and are highly effective in absorbing vibration energy. It is also effective in absorbing undulations (flicks). The thickness of the filament varies depending on the material, but in order for the structure to have physical property values of 7 ON/cm"・1 or less, a filament with a diameter of 0.2 to 3 mm is usually used. If it is thin, no matter how dense the network structure is, it will be deformed by the load or impact and will not be effective.In addition, if the diameter is 3 Wm or more, it will be too rigid and many materials will not exhibit behavior that can alleviate impact noise. The thickness of this three-dimensional network structure is preferably in the range of 3 to 20 mm at room temperature and in the open without any load (in the atmosphere).3+
If it is less than +wa, the effect of reducing impact noise such as tapping is poor, and even if it is 20 m or more, the impact noise reduction effect does not increase by that percentage, which increases the cost and increases the amount of floor sinking when a load is applied. This is because such problems arise.

Furthermore, as described above, this net-like structure can be used by laminating non-woven fabric or woven fabric on one or both sides of the structure in order to improve adhesion to wood board materials or floor slabs or to reinforce the net-like structure itself. (Figures 3 and 4).

Furthermore, as shown in Figure @2 to Figure @4, a decorative surface material may be pasted on the surface of this soundproof flooring material to make it a more practical or decorative flooring material.◎ Such decorative surface material 4 The material is selected from parquet plywood, hegi board, cedar decorative plywood, various veneer boards, synthetic wood, ceramic tiles, etc., and hard materials with a thickness of usually about 0.2 to 5 mm are preferably used.

In addition, the flooring material according to the present application may be a structure formed by laminating these constituent materials in advance, or may be a virtual structure formed by laminating each of these constituent materials on-site. .

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

Examples 1 and 2 Flooring materials having the structure shown in the following table were laid without gaps on the concrete floor of a concrete apartment building with a slab thickness of 200m+, and the JIS A 1418 (Floor impact noise at building sites) The impact sound from the tapping machine from upstairs was measured in accordance with the Level Measurement Method. The three-dimensional network structure 9 used in Table 1 is made from nylon filament and has a dynamic stiffness test value of 65N/
crn”・(7), and the viscoelastic material used was oil-temperature butyl rubber with a shear modulus of elasticity G = 5 at 100 Hz.
X 10'dyn/1M", tan δ = 0.7. As the wood-based wood, 12 plywood was used with the thickness shown in Table 1, and the decorative surface material was 0.25 rrr.
A veneer board of size m was used. The measurement results are shown in Table 2 and FIG.

Comparative Example 1 A 9-inch thick plywood was laminated on the three-dimensional network structure used in the example, and a 0.25-thick plywood was further attached to the plywood to form a flooring material. Regarding this flooring material, as in the example, JIS
Impact sound was measured based on A 1418. Second result
It is shown in the table and FIG.

Comparative Example 2 One side of the 911111 thick plywood used in Comparative Example 1 was coated with JI
A 9 m thick rubber sheet made of natural rubber with an S hardness of 80 was laminated with adhesive, and the plywood board used in the example was attached to the other side of the plywood to form a flooring material. Impact sound was also measured for this flooring material in the same manner as in the example. The results are shown in Table 2 and Figure 5.

Comparative Example 3 For comparison, impact sound was measured on only a concrete floor with a slab thickness of 200 mm in the same manner as in Example 1, without using any flooring material. The results are shown in Table 2 and Figure 5.

As shown in Table 2 and Figure 5, with the floor construction material made of only a three-dimensional network structure or rubber sheets, the consonant rating is about L-55, whereas in the case of the bottom construction example of this invention, Better results have been achieved than with L-50, which has traditionally been difficult to achieve in the bass range. In addition, it can be seen that L-65 is very poor when using only a concrete slab.

Effects of the Invention) The soundproof flooring material according to the present invention obtained in this way can be suitably used for concrete-based and ALC-based flooring materials. Compared to wet floating floor structures such as glass cool, rock wool, etc., and dry floating floor structures such as rubber blocks and rubber bats, the construction period is shorter and the action of the net structure is better able to absorb undulations on the concrete surface. It has characteristics such as being able to effectively reduce the floor impact level over a wide frequency range up to the low frequency range, which has been considered difficult in the past, as well as the high frequency range.

[Brief explanation of drawings]

FIGS. 1 to 4 are partial sectional views showing embodiments of the soundproof flooring material according to the present invention. In the figure, reference numerals 1 and 1' indicate a wooden board, 2 a viscoelastic body, and 3 a network structure. Patent Applicant Zeon Corporation Zeon Kasei Co., Ltd. Figure 3 Figure 4 Octave band center frequency (Hz) Procedural amendment (method) % formula % 1. Name of the invention Soundproofing Person who corrects the flooring material 1 Relationship with the cow Patent applicant address 6-1 Marunojiju-chome, Chiyoda-ku, Tokyo 1988
June 24, 2016 (shipment date) Subject of amendment/Request: The column for the brief explanation of the drawings will be amended as follows. In the figure, numerals 1 and 1 are wood-based boards, and 2 is a viscoelastic material. 3 each shows a network structure. that's all

Claims (1)

[Claims] 1. Shear modulus is 10^5 to 10 at 100Hz
Wood-based boards are laminated on both sides of a viscoelastic body with ^8 dyn/cm^2, and a three-dimensional network structure formed by intertwining metal filaments or synthetic or natural fibers is pasted on at least one of the boards. A soundproof flooring material that is characterized by: