JPH0791898B2 - Soundproof flooring - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a soundproof flooring material, and particularly useful as a soundproofing floor material for a second floor of a wooden house, especially as a floor structure. The present invention relates to a soundproof floor material capable of greatly reducing the amount of propagation to the downstairs and preventing floor noise that meets the strong demands of wooden house residents.

[Prior Art] With regard to soundproof floors of conventional houses, in concrete construction houses, due to the use of floating floor structures and cushioning materials, it is currently about JI.
Improvements have been achieved by the time it can pass the floor impact sound level sound insulation class L-60 specified by S, but for wooden houses it is extremely difficult due to the relationship of the structure and the properties of the materials, and a person skilled in the art makes an effort to research day and night. However, the current situation is that we have not yet completed a soundproof floor that satisfies us, and recently there are two floors above and below.
This desire has become stronger and stronger as the number of apartments in which the households live is increasing, and as a builder, it is unavoidable that the second floor should be laid with carpet or joutan in all places except tatami mats to prevent impact noise. However, this is not yet satisfactory, and it is a place where we often hear complaints from residents, and also it is harmful to insects such as house mites of carpets or Jewtan, or hygiene aspects such as adsorption of dust and dust. However, due to problems, residents are now hungry for soundproof floors that are made of wood and have excellent soundproofing effects.

[Problems to be Solved by the Invention] In the present invention, the second-floor slab of a two-story wooden house usually uses synthetic wood or particle board, and the sound insulation of the wooden slab is extremely poor. A soundproof floor (material) with excellent sound insulation is installed on the wooden slab to greatly reduce the propagation of floor impact sound, and the floor impact on the light weight sound within the JIS building sound insulation class (A1419) The objective is to pass the sound insulation class L-60 regarding sound level.

Other objects and novel features of the present invention will be apparent from the entire description of the present specification and the accompanying drawings.

[Means for Solving the Problems] In the soundproof flooring material according to the present invention, one surface of the vulcanized foam rubber sheet containing iron powder or iron oxide powder and having a large number of bubbles in the surface layer, or An asphalt consisting of a composite of two or more sheets and two veneers for plywood, the lower layer of which is kneaded into a plate by adding iron powder, iron oxide powder and / or steel slag. It consists of a plate,
It is characterized by comprising a structure in which a porous and elastic organic or inorganic impact material is interposed between the surface layer and the lower layer to be integrated.

The background of the development of the soundproof flooring material according to the present invention is as follows.

That is, the inventors of the present invention have conducted various experiments and trials on the relationship between various materials, the physical properties of the materials, and the sound insulation characteristics. (1) As the members constituting the surface layer, the surface is wood and One or two or more foam rubber sheets containing iron powder or iron oxide powder and vulcanized by filling a large number of bubbles with a single volume used for plywood production, as a low-volume sound and a low-noise sound. A composite plate in which two or more plates were bonded together was selected. As a result, the sound generated by the impact of the object can be greatly reduced.

(2) On the other hand, the asphalt plate-like body was selected as the member constituting the lower layer. In general, it is said that it is very difficult to insulate the low-to-middle frequency range of 63 to 500 Hertz that constitutes the generated impact sound, but the present inventors have found that as a result of experimental research, iron powder on asphalt, The asphalt plate-like body made of iron oxide powder, one kind of iron and steel slag (slag), or a mixture of these, or a part of which is replaced with sand or crushed stone, produces a floor impact sound I learned that there is a function of sound insulation that can effectively reduce the sound in the middle range.

(3) Furthermore, in order to block the sound in the high frequency range of 1 to 4 kilohertz, which is the internal frequency of the generated impact sound, it is effective to reduce it by a sound absorbing action or the like. It has been found that the organic or inorganic cushioning material contained therein may be used as an intermediate layer member between the surface layer and the lower layer.

Further, by being characterized in that the above three types of layers are combined and integrated, a soundproof floor material having excellent sound insulation performance against floor impact sound can be obtained.

Next, the soundproof flooring material of the present invention will be described with reference to the drawings.

FIG. 1 shows an example cross section of a composite plate used for the surface layer according to the present invention. 1,2,4,5, shows four veneers used to manufacture plywood,
Reference numeral 3 denotes a foam vulcanized rubber sheet containing iron powder or iron oxide powder and filled with a large number of bubbles.

FIG. 2 shows an example of the structure of the soundproof floor according to the present invention. In the figure, A is a soundproof flooring material of the present invention, 6 is a composite plate of the surface layer,
7 is a porous and elastic organic or inorganic cushioning material, and 8 is an asphalt plate-like material in which iron powder or iron oxide powder or steel slag, or a part of which is replaced with sand or crushed stone, is kneaded. . Further, in the same figure, 9 indicates a wooden slab (plywood or particle board) on the second floor of a wooden house.

Next, each layer constituting the present invention will be described in detail.

(1) Preferred examples of the surface layer include, for example, butadiene rubber, isoprene rubber, and chloroprene copolymerized or homopolymerized by emulsion polymerization with a monomer having a conjugated double bond, such as butadiene, isoprene, or chloroprene as the main composition (70% or more). A mixed latex obtained by replacing one or more synthetic rubber latex such as rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber latex or a part of the synthetic rubber latex with natural rubber latex (hereinafter, these are simply latex. Is used as a main agent, and additives necessary for vulcanizing at least the rubber component in the latex, for example, vulcanization aids such as sulfur powder and various vulcanization accelerators, and surfactants and High-speed latex mixed solution made by adding a foaming agent such as metal soap The foamed latex is agitated by stirring, and 1 part by weight or more and 10 parts by weight or less of iron powder or iron oxide powder is added to and mixed with 1 part of the rubber component contained in the mixture solution. It may be foamed after adding iron powder or iron oxide powder), and the foamed latex mixed solution prepared by adding a delaying gelling agent such as sodium silicofluoride to this foamed latex mixed solution is cast on a flat body. A liquid layer having an appropriate thickness, and one or two or more foam rubber sheets obtained by vulcanization after gelling and molding, and two or more veneer sheets used for plywood production, and adhesion to bond them well An example is a composite plate obtained by laminating and adhering a compound (for example, a mixed type of synthetic rubber latex and amino resin), and when this composite plate produces impact sound by hitting, ordinary plywood or particle board In a similar way It was found that the volume of sound generated was 10 to 30% less than that of the impulsive sound generated, and the sound reduction effect was remarkable especially in the mid-high range. Regarding the method for producing the composite plate, Japanese Patent Application No. 61-229806 (see Japanese Patent Publication No. 7-8537) filed by the present applicant is applied.

(2) The lower layer is preferably made of asphalt JIS standard type 60-80 (softening point 44 to 52 ° C) to 10-20 as a raw material.
Use asphalt with a softening point of 55 ° C or higher, and if necessary, add blown asphalt, synthetic resin (eg polyethylene, polyvinyl chloride, etc.), synthetic rubber (eg isoprene rubber, chloroprene rubber, styrene-butadiene rubber, etc.) Asphalt may have improved physical properties such as heat resistance and deformation resistance.

After asphalt is heated and melted, asphalt is mixed with 200 to 900 parts by weight of iron powder, iron oxide powder or steel slag, or 100 parts by weight, or one or more kinds thereof, or 1
Add parts in which sand and crushed stones are replaced, and mix and mix basalt-like or sand-like substances on a flat plate by casting or stacking to obtain a substantially uniform thickness, and roll or flat plate pressure With the required thickness, by cooling and solidifying this, it is possible to obtain a heavy plate-shaped material having a specific gravity of 2.0 or more.

In the present invention, it is preferable to use such a heavy asphalt plate having a specific gravity of 2.0 or more as the lower layer in order to achieve the object of the present invention. This asphalt plate has a manufacturing process,
For the convenience of storage and handling, one or both sides of this plate-like body may be covered with a plate material such as cardboard or plywood and melt-bonded.

The sound insulation property of this asphalt plate is frequency 63,12.
Not only is it excellent at isolating the bass at 5,250 Hz,
It has been found that the middle frequency of 00 Hz can be effectively reduced. The sound insulation performance of this asphalt plate was measured and found to be 63,1
It was found that 10 to 20 dB (decibel) can be reduced at 25,250 Hz and 15 to 35 dB can be reduced at 500 Hz.

(3) The cushioning material to be interposed between the surface layer and the lower layer as an intermediate layer is a porous and elastic cushioning material such as commercially available glass wool, rock wool, foam rubber, urethane foam, felt, amber board, and soft fiber board. Examples thereof include polyethylene or polyvinyl chloride foams. As the sound insulation performance characteristics of these cushioning materials, it is extremely effective in reducing the high sound of 1,2,4 kHz. When its sound insulation performance is measured, it is possible to reduce the sound by 10 to 40 dB (Digibell) in these high frequencies. However, it was found that the effect was not so great in the low and mid frequency range, and that the attenuation range was 10 dB or less.

This cushioning material does not withstand the load applied to the floor and its thickness is reduced, so that it is easily deformed. Therefore, it is preferable to select and use not only the sound insulation performance but also the physical properties which are not easily deformed under load and whose processing is improved or a composite of two or more kinds.

As described above, the three layers constituting the soundproof flooring of the present invention are individually described, and these three layers have different sound insulation characteristics,
The soundproofing material in which these three layers are combined and integrated has the respective soundproofing properties exhibiting a synergistic effect, and as a result, the soundproofing flooring material of the present invention is placed on the wooden slab (plywood or particle board) of the wooden house, which is currently extremely difficult. JIS A-1418
When the floor impact sound is generated using the light weight floor impact sound generator specified in s.1, the sound insulation performance that can pass L-60 of the floor impact sound level sound insulation class specified in JIS A-1419 is obtained. It was

In the present invention, a cushioning material may be further attached to the lower portion of the lower layer asphalt plate-shaped body of the soundproof floor material having the three-layer structure.

EXAMPLES Next, the present invention will be described based on examples.

[Example-1] [Production of composite plate constituting soundproof floor] Production of foam rubber sheet 70% of SBR (styrene-butadiene rubber) synthetic rubber latex with 67% of rubber component used in production of foam rubber and 60 of rubber component % Natural rubber latex 30% is mixed and used as the main agent.

The following chemicals were added as additives.

Chemical name Solid content Compounded rubber latex (base) Approx. 65% 100.0 parts Potassium oleate 40% 8.0 parts Anti-aging agent SP 60% 1.0 part Trimen base 50% 1.0 part Vulcanization accelerator MZ 50% 1.5 parts Vulcanization acceleration Agent EZ 50% 0.5 parts Sulfur 50% 2.0 parts Zinc white 50% 6.0 parts Clay (powder) 10.0 parts The above agents are added and stirred at high speed to foam simultaneously with the mixing of the agents and the expansion ratio (by volume) is about 2 Triple.

Iron oxide powder was added to this foamed latex in a weight ratio of latex 10
350 parts was added to 0 parts and mixed with stirring, and further 4 parts by weight of sodium silicofluoride (50%) was added and mixed to obtain a foamed latex mixed solution.

The foamed latex mixed liquid on a continuous non-woven fabric is regulated to a liquid layer having a thickness of 3 m / m by controlling the thickness of the non-woven fabric by the operation of the non-woven fabric by the operation of a doctor knife and a conveyor, and the far-infrared device 120 ° C. Heat the mixture for 1.5 minutes to gelate the mixture, cut it to a specified size, put it in a heating chamber and vulcanize it for about 20 minutes at 125 ° C. It contains iron oxide with a specific gravity of 2.1. A foam rubber sheet filled with a large number of bubbles was obtained.

Two layers of lauan veneer used for manufacturing plywood with a thickness of 1 m / m on both sides of this rubber sheet are combined in a five-layer structure so that the fiber directions on both sides are parallel to each other. Good compatibility with urea resin on both sides of 4th layer veneer
60 parts (weight ratio) of SBR latex and 40 parts (weight ratio) of urea resin are mixed to form the main agent, and 2 parts (weight ratio) of ammonium chloride and 10 to 20 parts (weight part) of flour for viscosity adjustment are added to this. Adhesive formed by adding and mixing, applying a coating amount of 350 g / m ² and stacking these veneers and rubber sheets, pressure 5 Kg / cm ²
After cold-pressing for about 30 minutes, the temperature is 115 ° C and the pressure is 5 Kg / cm ^{2 for} 3 minutes, and the foam rubber sheet containing iron oxide is sandwiched between the core layers. A 5-layer composite plate having two sheets (however, the fiber directions on the front and back sides were parallel to each other) was obtained.

[Lower layer structure] Asphalt 10 with penetration of 60-80 (softening point 44.0-52.0 ° C)
Melt 0 parts by weight at 120 ° C and add 500 parts by weight of iron oxide powder preheated to 120 ° C to this to knead while heating at 120 ° C or higher to form a base, which is cast on a cardboard, This asphalt plate is rolled with a pressure roll to regulate the thickness to 15 m / m, covered with cardboard, and then pressed with a pressure roll to be pressed and solidified to form an asphalt plate. Had a specific gravity of 2.8.

[Manufacture of soundproof floor material] As a cushioning material between the surface layer and the lower layer, a density of 20 m / m 4
A urethane foam of 9.6 kg / m ² was interposed.

The above three-layer soundproof floor is constructed on a particle board slab with a thickness of 25 m / m, and the floor impact sound generated by operating the lightweight floor impact sound generator specified in JIS is generated on this floor.
As a result of the measurement according to the method specified in 1), the measured value for each octave band center frequency is as shown in Table 1, and it was found that it can pass JIS, the floor impact sound level sound insulation class L-60.

[Example-2] (1) The composite plate used in Example-1 was used for the surface layer, and (2) 100 parts by weight of asphalt having a penetration of 60-80 was melted at 125 ° C for the lower layer. 400 parts by weight of iron oxide powder and 150 parts by weight of sand heated in advance to 125 ° C. were added, and a kneaded black sticky sandy substance was deposited on a 4 m / m plywood plate to a uniform thickness of about 18 m / m, A 4 m / m plywood is further laid on top of this, and this is put in a cold press with an insertion pressure of 1 to 4 kg / cm, pressurized to a thickness of 15 m / m, and then allowed to cool. A 2.6 bitumen board was obtained.

(3) A cushioning material with a thickness of 20 m / m and a weight of 1.8 Kg / m ² is inserted as a cushioning material to be interposed between the surface layer and the lower layer, and a sound-insulating floor having a three-layer structure is used to form particles with a thickness of 25 m / m. It was constructed on a board slab.

The floor impact sound was generated by the method of Example 1 and the measurement result by the method of Example-1 was as shown in Table 2.
It was found that the I, S, floor impact sound level sound insulation class L-60 could be passed.

[Example-3] (1) The composite floor used in Example-1 was used for the surface layer, and (2) 70 parts by weight of asphalt with a penetration of 60 to 80 and blown with a penetration of 10 to 20 for the lower layer. Asphalt 30 parts by weight 150
370 parts by weight of iron oxide powder and 150 parts by weight of iron and steel slag that had been melt-mixed at ℃ and preheated at 150 ℃ were added and kneaded to obtain a black sticky sandy material, and this sandy material had a thickness of 3 m / m on plywood. 18 m / m is deposited to a uniform thickness, 3 m / m plywood is covered on top of this, and the stack is inserted into a cold press to apply pressure of 2-5 Kg / cm to 15 m / m to let it cool and plywood sandwich. Specific gravity of mold
A 2.7 bitumen board was obtained. Using this as the lower layer, a thickness of 20 m / m as an impact material to be interposed between the surface layer and the lower layer,
A molded glass wool board having a weight of 3 kg / m ² was inserted, and a soundproof floor having a three-layer structure was constructed on a particle board slab having a thickness of 25 m / m.

This floor was made to generate a floor impact sound by the method of Example 1, and the results of measurement by the method of Example-1 are as shown in Table 3 J,
It was found that the I, S floor impact sound level sound insulation grade L-60 could be passed.

[Advantages of the Invention] According to the above invention, a soundproof flooring material having a high soundproof effect can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a surface layer showing an embodiment of the invention,
The figure is a cross-sectional view of the structure of the soundproof floor according to the present invention. A: Soundproof floor material 6: Surface layer 7: Impact material 8: Lower layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-61-261048 (JP, A) Actually open 62-203338 (JP, U) Actually open 62-155158 (JP, U)

Claims (2)

[Claims] 1. The surface layer of the flooring material contains one or more vulcanized foam rubber sheets containing iron powder or iron oxide powder and having a large number of bubbles, and a veneer 2 for plywood. A composite plate made by laminating two or more sheets together, and the lower layer of the flooring material is one or more of asphalt, iron powder, iron oxide powder and steel slag, or 1 of iron powder, iron oxide powder and steel slag. Or a mixture of two or more species and sand or crushed stone and kneaded to form a plate-like body, or a plate material is joined to the asphalt plate-like body, and the surface layer and the lower layer A soundproof flooring material, characterized by comprising an integrated structure with a porous and elastic organic or inorganic cushioning material interposed therebetween. 2. The soundproof flooring material according to claim 1, wherein the asphalt is an asphalt obtained by adding, melting and mixing a synthetic resin or a synthetic rubber.