JPS6153959A - Vibration-proof sound blocking floor structure - 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 vibration-proof and sound-proof floor structure, particularly a floor structure in which a vibration-proof and sound-proof flooring material is laid on a concrete slab of a frame that divides the floors of a high-rise apartment complex. This relates to a vibration and soundproof floor structure that prevents vibrations and noise from being transmitted upstairs.

[Problems that conventional technology and inventions attempt to solve] In recent years,
Vibrations and noise in the residential environment cause discomfort to residents, and in some cases can become unbearable obstacles, and especially in apartment complexes, the impact on others is significant, so improving vibration and sound insulation is an important issue. It is said that

In order to prevent the propagation of such vibrations and noise, it is basically important to simultaneously satisfy the sound insulation effect and sound absorption effect of air-borne sound, and the vibration-proofing effect and vibration allocation effect of solid-borne sound. Since the sound insulation effect 2 is to absorb sound wave energy, it is appropriate to use a material with a high specific gravity. Ideally, materials such as lead or steel plates would be used, and the thickness of the concrete in the building frame would normally be kept above a certain level. Since sound absorption is to prevent the reflection of sound, materials with rough surfaces, materials with pores, and materials with many fine voids inside are effective. The materials used are:
Plastic foam, felt, rock wool, glass wool, inorganic spray materials, etc. Furthermore, since the vibration damping effect must absorb the vibrations of a vibrating object, a material with a high self-damping capacity due to internal friction is preferably used, such as a rubber elastic body.

As mentioned above, it is difficult to obtain a single product that satisfies different functions or mutually contradictory properties at the same time, and therefore,
BACKGROUND ART Conventionally, in order to prevent vibration and noise, research and development have been carried out and commercialization has been carried out on the creation of composite materials of various materials and the provision of secondary structure by laminating different materials.

Conventionally, typical materials used as vibration and soundproof flooring materials include those with lead fiber non-woven fabric embedded between rubber layers, those with lead foil pasted on urethane sponge, and those with lead foil laminated between sound-insulating steel plates. Those with a secondary structure such as those containing rock wool or glass wool, those that use urethane foam, styrene foam, concrete foam, etc. alone, those that use plywood or boards as floating floors, and the supports that are made of plastin 7 There are also dry double-layer structures that use anti-vibration rubber.

However, when creating a secondary structure by combining different materials, construction is not only very complicated and disadvantageous in terms of cost, but also heavy and impractical. Ta.

In addition, although the use of the above-mentioned foam is lightweight and the construction is relatively hourly, it can only be expected to have a sound absorption effect, and the vibration damping effect is not at a satisfactory level, especially vibration in the low frequency range.
The vibration and sound insulation effect against noise was low, and it was not possible to demonstrate any effect beyond the sound insulation properties of concrete slabs0
Normally, when foam is used for flooring, it is laid on a concrete slab using adhesive or mortar, but in this case, it requires skill to level the floor, and
If the construction conditions were poor, there was a risk that the sound insulation effect would be significantly inferior.

Dry double structure has the advantage of being easy to construct and being inexpensive, but the vibration and soundproofing effect is only achieved at the branch office and is incomplete, and the vibration and soundproofing effect of concrete slabs cannot be achieved. It was customary for the effects to be worse than the effects.

As stated above, each of the conventional vibration and soundproof flooring materials has its own drawbacks, so the method of construction is to make the concrete slab as thick as possible, but this still reduces the cost and overall building cost. There is a limit due to weight.

In view of the above-mentioned problems of the prior art, the present invention provides a soundproofing and sound-absorbing effect as well as vibration-proofing and vibration-damping effects, which is lightweight, easy to install, and inexpensive, and which has excellent heat insulation and fire resistance. The purpose is to provide a vibration-proof sound floor structure.

[Means for solving problems]

The means according to the present invention for solving the above-mentioned problems is a vibration-proof and sound-proof floor structure in which a vibration-proof and sound-proof flooring material is laid on a concrete slab of a building frame structure, in which the vibration-proof and soundproof flooring material is made of benzyl ether. A polyurethane matrix comprising a polyol component having a group and a polyisocyanate component having a polyisocyanate group having two or more isocyanate groups in at least one molecule and foaming the iron oxide particle component. The material containing the oxide particle component is 20 to 80% by weight based on the total of the three components. It is composed of a sandwich structure in which a foam with a density of 50 to 800 kg/g is sandwiched between a surface material and a back material, and the vibration-proof and sound-proof floor structure is made of a concrete slab, the above-mentioned vibration-proof and sound-proof floor material, and between the two. It consists of a three-layer structure consisting of an air layer formed with struts interposed therebetween.

The polyol component containing a benzyl ether group (hereinafter referred to as component (I)) used in the present invention is obtained by reacting the two in the presence of a catalyst at a ratio of 1 to 3 moles of formaldehyde per 1 mole of phenol. It is a phenol formaldehyde resin obtained by
It is a liquid resin having an average of 0.1 to 2 hensyl ether groups and 0.5 to 3 methylol groups per unit.

The structural formula of one example is as follows.

This liquid resin can be used either in a solvent-free system or in a solvent system, but it is preferable to set the viscosity of the liquid to 20.000 cp or less at room temperature because this facilitates the blending of the iron oxide particle component. Furthermore, phenol formaldehyde resins include those in which a portion of the phenolic hydroxyl groups are converted to alcoholic hydroxyl groups, or those in which the hydroxyl group concentration, reactivity, and elasticity of the resin are adjusted.

Typical polyisocyanate components having two or more incyanate groups in at least one molecule (hereinafter referred to as component (■)) used in the present invention include 4,4'-diphenylmethane diisocyanate (MDI), 2.4
-In addition to toluene diisocyanate (TDI), phenylene diisocyanate, etc., there are also diisocyanates prepared by prepolymerizing them with a polyol component, in which reactive isocyanate & remains.

Further, the iron oxide particle component (hereinafter referred to as component (■)) used in the present invention is generally ferrite, magnetite, hematite, limonate, iron sand, etc., with a particle size of 0.1 to 100 μm, preferably 0.5 to 50 μm. Iron oxide particles such as Its composition is not particularly limited, and mill scale generated from forged products whose main components are red iron oxide and triiron tetroxide can also be used.

If the particle size of the iron oxide is larger than 100 μm, the weight per particle becomes too large and homogeneous mixing and dispersion cannot be achieved, and if the particle size is less than 0.1 μm, it is practically difficult to obtain.

In the present invention, the mixing standard of component (1) and component (II) can be freely selected based on the hydroxyl value as a reactive group and the ratio with isocyanate i, but the preferred ratio is hydroxyl value/isocyanate group 0.5 to 2. iJ depending on the curing speed within the range
I! do.

In addition, the proportion of component (III) in the foam molded product is (I[I) / (I + n + I[[) in a weight ratio of 0.2 to
0.8, preferably 0.4 to 0.7. If it is less than 0.2, the sound and vibration absorption effect of the lightweight molded product will be small, and if it is more than 0.8, the viscosity of the resin component will increase significantly, making it difficult to handle as a fluid and significantly reducing workability. make it worse

The density of the foam molded product used in the present invention is 50 to 800k.
g/r+? , preferably 70 to 600 kg/rcr. At less than 50 kg/i, the compressive strength is 2 kB/i
CII+ or less, and sufficient strength as a molded body cannot be obtained, and in particular, the noise shielding effect, which requires mass, is not sufficient. 800kg/n? If it is larger, the internal porosity will decrease and the sound absorption effect will deteriorate. There are no particular limitations on the density adjustment method, but the most preferred method is:
Component (I) is added to component (1) and/or component (I()) in advance.
II) is premixed, and if necessary, a blowing agent such as a low boiling point halogenated hydrocarbon is mixed, or a solvent that reacts with the isocyanate to generate gas such as carbon dioxide is added. They are blended together and finally mixed and cured. At this time, a curing accelerator and a foaming inhibitor may be used in combination, if necessary. Density control can be achieved by varying the amount and temperature of the blowing agent and the volume of the mold.

Surface materials used in the vibration-proof and sound-proof flooring materials of the present invention include base materials and floor finishing materials, and the floor finishing materials may be used in combination with the base material or alone.

Base materials include concrete panels, plywood plywood, gypsum boards, asbestos cement boards, calcium silicate boards, etc., and floor finishing materials include wood laminated flooring materials, vinyl tiles, etc.

On the other hand, as the backing material, wooden boards such as plywood, concrete panels, hardboards, or inorganic boards such as gypsum boards and asbestos boards are preferably used, but as long as they are inexpensive and have a strength reinforcing effect. Either is fine (but is not particularly limited).

Next, a method for manufacturing a vibration-proof and sound-proof flooring material having a sandwich structure will be explained. Preferably, a method is used that utilizes the self-adhesive properties of polyurethane resin. That is, when foaming the foaming composition in a mold, after setting the front material and the back material on the upper and lower surfaces of the mold in advance, pouring the composition and simultaneously performing foaming and adhesion with the facing material,
This is a method of obtaining the sandwiched flooring material. However, the method is not limited to this method, and a method may also be used in which a foamed molded product is first molded and a front material and a back material are adhered thereto using an adhesive. However, this method has some problems in terms of cost and construction.

In the present invention, the struts that are interposed between the concrete slab and the vibration/sound insulating flooring material and used to form an air layer between the two also have the function of adjusting the height. The material of the support column may be plastic, metal, wood, rubber, etc. alone or in combination, but is not particularly limited.

The thickness of the air layer is basically determined by the flexibility of the flooring material (for example, 1
0.1 to II under a static load of 00 kg), but it can be determined freely depending on the flatness of the flooring material or the installation environment (for example, the height of floor piping, stile, etc.).

[For production]

The polyurethane resin used for vibration and soundproof flooring is composed of the component (I
) reacts with the isocyanate group of component (n) to give a strong, rigid, and elastic cured product. Furthermore, the length of the bond spacing between the benzyl ether groups in component (1) provides appropriate elasticity, and the cured product takes on a stretchable structure.As a result, it has self-damping ability against vibrations, and Improves dynamic absorption. The cured product is based on phenol formaldehyde resin and has high heat resistance, improving fire resistance and heat resistance.

The foamed molded product made of the polyurethane resin and iron oxide particles has countless fine voids inside thereof, thereby preventing the reflection of sound. In other words, it acts as a sound absorber. In addition, iron oxide particles have a relatively high specific gravity and have sufficient mass to absorb sound wave energy, further enhancing the sound absorption effect.

The front and back materials used in vibration-proof and sound-proof flooring materials reinforce the strength of the foam molded product, and in particular, the back material is made by interposing struts between the concrete slab and the flooring material to create an air space between them. It makes it possible to form. That is, the foam is prevented from being destroyed by the struts. The surface material also eliminates the need for raising the floor, which is conventionally done.

Concrete 1 - The support provided between the slab and the vibration/soundproof flooring has the function of forming an air layer between the two, and also has the function of adjusting the height of the flooring. This allows for easy leveling (parallelism).

In addition, the air layer provided between the concrete slab and the vibration/sound insulating flooring material is based on the viscoelasticity of the flooring material against vibrations (it develops a self-damping force due to instantaneous and minute deflection phenomena). In addition to reducing its natural vibration, when the above-mentioned phenomenon occurs, the sound absorption effect is increased by the conversion of sound energy into thermal energy by the iron oxide particles such as ferrite in the flooring material, and furthermore, the vibration is directly transmitted to the concrete slab. It acts to prevent the spread of the virus.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on examples.

Resin Production Example 1 200 kg of phenol and 204 kg of 47% formalin were placed in a 10001 reaction vessel, 1.4 kg of lead naphthenate was added as a catalyst, the temperature was raised, and a condensation reaction was carried out at 100 to 103° C. for 4 hours. Next, length L = 23 m, diameter D =
0.023 m (L / D = 1000), the inlet is 1.5 kg/cnl, the middle is 3.5
kg/a+! , outlet 3, 0 kg/cot of heated steam, the condensate at a pressure of 0.8” g/cnl, a flow of f
Infused at fl 50 kg/hr. At this time, the evaporation tube at the outlet was set at 125° C. with 60 ng to 1100 IIIlt1, and continuous concentration under reduced pressure was performed. The concentrated benzyl ether type phenolic resin had the following characteristics. (Hereinafter referred to as resin A) Viscosity 9
000cp/20℃ Concentration 85% Moisture 0.9% Free phenol 4.3% Free Polmarin 0.2% OH value 5
60 x Tyrol group/Ether group 1/1 Resin production example 2 100 kg of resin A and 42 kg of ethylene carbonate were placed in a reaction vessel, and further 1 kg of 2CO30 was added and reacted at 110°C for 40 minutes. After the reaction was completed, the monomer was removed under reduced pressure while carbon dioxide gas generated as the reaction progressed was removed from the system to obtain an alcohol-modified Hensyl ether type phenol resin.

The resin properties were as follows. (Hereinafter referred to as resin B.

) Viscosity 2500cp/20”C concentration
85% Moisture 0.9% Free phenol 4.3% Free formalin 0.2% OH value 4
03
g and 7.15 kg of iron oxide particles with a particle size of approximately 1 to 10 μm.
was added and mixed uniformly at 300 rpm for 3 to 5 minutes.

Next, 0.02 kg of silicone L-5420 (manufactured by Nippon Unica) as a foam stabilizer, 0.2 kg of fluorocarbon-based Freon 11 (manufactured by Asahi Glass) as a foaming agent, 0.03 kg of triethanolamine as a curing accelerator, and a foaming inhibitor. Then, 0.01 kg of p-)luenesulfonic acid was added, and the mixture was further mixed uniformly for 1 to 2 minutes. After mixing, 2 kg of resin A was added, stirred at 300 rpm for 1 minute, and the front and back materials were immediately set on the 900 x 1,800
Pour into a 60x mold, foam, and reduce the density to 100.
A sandwich foam flooring material for the front and back surfaces of 7d was obtained.

The facing materials used were 1211Il concrete panels on both the front and back surfaces, which were firmly adhered by the self-adhesive force of the foam.

Attach six plastic bolts and screws to the back of the resulting sandwich foam flooring, and make a floor area of 20n? It was laid on a 15 (h + m) concrete slab in the room to create an air layer of 50 m. Floor finishing was unnecessary as the surface material was used as is.

The vibration and soundproofing effect was determined by hitting a test specimen on the constructed floor using a bang machine in accordance with JIS-A-1418r "Method for measuring floor impact sound level on site" and measuring 1/1 on the lower floor.
Sound pressure levels were measured for each octave band. As a result, the sound insulation grade for heavy floor impact noise according to the Architectural Institute standards was L-4.
4, the application grade was good, special grade. The data are shown in Table ■.

The flooring material had an oxygen index of 28 as defined by JIS-7201, and passed grade 2 flame retardancy. In addition, the thermal conductivity was 0.019 kcal/m, br, °C, and the floor structure had an excellent vibration and sound insulation effect.

The density of the foam is 500 kg/rr according to Example 1.
, 200kg/i, 70kg/n? A vibration and soundproof flooring material was obtained.

As a result of conducting the same test as in Example 1, the sound insulation grade was L-44 and mustard-45, and the application grade was special grade. Data are shown in Table I. The flooring material passes grade 2 flame retardancy, and has a thermal conductivity of 0.019 kcal/m, hr, °C.
It was a vibration and soundproof flooring material with excellent heat insulation effects.

The amount of iron oxide in Example 1 is 1.15 kg, 3.15
kg.

Vibration and soundproof flooring materials were manufactured using the same procedure except that the weight was changed to 11.1 kg. The density of the obtained flooring material is 100 to 8/n
i. As a result of conducting the same test as in Example 1, the applicable grade for each was special grade. The data are shown in Table ■.

In addition, all of the obtained flooring materials passed the flame retardant class 2 and had a thermal conductivity of 0.
．． 019kcal/m, hr, "C" vibration and soundproof flooring material.

Examples 8 to 10 Tests were conducted in accordance with Example 1 except that the surface material used was changed.

As a result, each application grade was special grade. Display data■
Shown below.

Example 11 A test was conducted in accordance with Example 1, except that the props used were changed to cushion rubber. As a result, the application grade was special grade. The data are shown in Table I.

Lost Journey ■1 The vibration and sound insulating flooring material produced in Main Example 1 was laid on a 120 mm concrete slab in a room with a floor area of 20 m, and the sound insulation grade was L-50 and the applicable grade was grade 1. Table I
Shown below.

Stop ■Upper floor area 20n? As a result of conducting a test according to JIS-A-1418 on a 150 mm concrete slab indoors, the sound insulation grade was L-55 and the applicable grade was 2nd grade.

The data are shown in Table ■.

Northern comparison 1. According to Example 1, the density was 40 kg/n? , 90
We manufactured and installed vibration and soundproof flooring materials using 0kg/rd foam moldings.

As a result of conducting the same test as in Example 1, the density was 40 kg/
n? The compressive strength of the product is as low as 0.9 kg/-, and the bread'
A crank occurred during a test using a gum machine, and the material could no longer be used as a flooring material. Also, density 1000kg/
The product of rrr had a sound insulation grade of L-53 and an application grade of grade 2, which was almost equivalent to direct finishing on concrete. The data are shown in Table I.

A flooring material was obtained and installed using the same manufacturing method as in Kitakasa ■Work Example 1, except that the iron oxide was not used.

As a result of conducting the same test as in Example 1, the sound insulation grade was L-5.
6, the application grade was grade 2, which was worse than direct finishing on concrete. The data are shown in Table ■.

Comparative Examples 5 to 6 The vibration and soundproof flooring material obtained in Example 1 was directly adhered to a 15 ha concrete slab in a room with a floor area of 20 rrr using an epoxy adhesive to finish the floor.

As a result of testing according to JIS-A-1418, the sound insulation grade was L-50 and the applicable grade was 1st grade, which was good.

However, the test results for the 120 Dragon concrete slab used in Example 12 showed that the sound insulation grade was L-57 and the application grade was grade 2, and no effect sufficient to reduce the thickness of the concrete slab was found.

Comparative Example 7 Two 121 concrete panels were installed on a 120m+a concrete slab in a room with a floor area of 20m' using plastic bolts to form a dry double structure with an air space of 50 fins, and the JIS- As a result of testing according to ^-1418, the sound insulation grade was L-65, and the applicable grade was not equal. The data are shown in Table ■.

As a result of conducting a test in accordance with JIS-A-1418 on a 120+U concrete slab with a floor area of 20 rrf, the sound insulation grade was L-60 and the applicable grade was grade 3. The data are shown in Table ■.

2nd garden ■ Land owner: Use resin B instead of resin A and use Tris as a flame retardant.
A sandwich foam law was made using the same manufacturing method as in Example 1, except that 0.6 kg of β-chloroethyl phosphate was used, and a construction test was conducted in the same manner as in Example 1. As a result, the sound insulation grade was L-44. was a special grade. still,
According to this law, the oxygen index was 30, which passed the grade 2 flame retardancy.

The heat transfer rate was 0.019 kcal/m, hr, ``C'', and the floor structure was vibration and soundproof with excellent heat insulation effects.

〔Effect of the invention〕

As is clear from the above description, the present invention has a three-layer structure consisting of a concrete slab, an air layer, and a vibration/soundproof flooring material, which has the effect of insulating and absorbing air-borne sound due to the synergistic effect of each structure. It has a vibration-proof and sound-proof floor structure that satisfies both the effects of vibration isolation and damping of vibrations caused by solid-borne sound. In particular, the vibration and soundproofing properties in the low frequency range of 63Hz, which could not be achieved conventionally, were reduced by more than 10 dB compared to conventional methods, which was an extremely improved effect (see Table 1).

In addition, due to the lightweight nature of vibration- and sound-insulating flooring materials made from foam moldings, the ground-ground structure not only reduces the total weight of the frame structure that separates floors, especially in apartment complexes, but also has great vibration- and sound-proofing effects. , the thickness of conventional concrete slabs can be reduced, and since the front and back surfaces are used for vibration and soundproof flooring, the floor finishing process can be omitted and floor leveling becomes easier. The ability to drastically reduce construction costs is an amazing effect.

In addition, the ground-contact structure has excellent heat resistance, so it softens the cold feeling of concrete and provides a comfortable residential space, and also has excellent heat resistance and fire resistance.

It goes without saying that the floor structure of the present invention can be fully utilized not only in high-rise housing complexes but also in floor structures for ordinary houses and other buildings.

Claims (1)

[Claims] 1. A vibration-proof and sound-proof floor structure in which a vibration-proof and sound-proof flooring material is laid on a concrete slab of a building frame structure, wherein: (i) the vibration-proof and soundproof flooring material contains a benzyl ether group; and a polyisocyanate component having at least two or more isocyanate groups in one molecule, the iron oxide particle component is contained in a polyurethane matrix and foamed. A sandwich structure in which a foam having a particle component content of 20 to 80% by weight based on the total of the three components and a density of 50 to 800 kg/m^3 is sandwiched between a surface material and a back material. and (ii) the vibration-proof and sound-proof floor structure is a three-layer structure consisting of the concrete slab, the vibration-proof and sound-proof floor material, and an air layer formed by interposing struts between the two. A vibration-proof and sound-proof floor structure characterized by: