JPH08297492A - Damping sound insulating material - Google Patents

Abstract

PURPOSE: To obtain a damping sound-insulating material which is excellent in shielding property against impact sound on a floor and is suitable as a flooring material by laminating each specified sound insulating layer and synthetic fiber nonwoven fabric layer. CONSTITUTION: This damping and sound-insulating material is produced by laminating a sound insulating layer comprising a high-sp.gr. filler and a binder component essentially comprising a nonvulcanized rubber and a synthetic fiber nonwoven fabric layer having the weight per unit area between >=100g/m<2> and <=500g/m<2> . In this case, the high sp.gr. filler is iron sand, iron powder, iron oxide, calcium carbonate, zircon sand, chromite sand, slag powder in iron manufacturing process, silica sand, lead sand, tin oxide, zinc oxide, barium sulfate, iron sulfide, mica, aluminum hydroxide, talc, or clay. The nonvulcanized rubber is a rubber not treated for vulcanization such as natural rubber, SBR, NBR, CR, BR, and IR. Moreover, the synthetic fiber nonwoven fabric is a nonwoven fabric of synthetic long fibers produced, for example, in processes of spinning synthetic fiber, forming a fiber web and bonding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping and soundproofing material used for soundproofing a house or the like, and particularly to a vibration damping and soundproofing material suitable for use on a floor of a house.

[0002]

2. Description of the Related Art With the recent increase in wooden floors, multi-family houses, and the like, in apartment houses and general individual houses, there is an increasing demand for prevention of floor noise downstairs. It is important that the vibration damping and soundproofing material used to prevent floor noise has excellent vibration damping and soundproofing properties.

A suitable vibration damping and soundproofing material for improving the impact sound of a floor, particularly a wooden floor, is disclosed in, for example, JP-A-63-
Japanese Patent No. 259595 proposes a sheet in which a high specific gravity filler is added to rubber. This sheet is usually applied on a floor base material such as plywood, and wood flooring is applied on it.

[0004]

However, the above-mentioned sheet cannot sufficiently reduce the noise due to the vibration of the floor plate which is generated in the case of floor impact.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a vibration damping and soundproofing material having a very excellent floor impact sound insulation and suitable for floors. To provide.

[0006]

A vibration-damping and sound-proofing material according to the present invention is a sound-proofing layer comprising (A) a high-specific-gravity filler and a binder component whose main component is unvulcanized rubber, and ( B) A synthetic fiber non-woven fabric layer having a surface weight of 100 g / m ² or more and 500 g / m ² or less is laminated, and thereby the above object is achieved.

The vibration damping and soundproofing material according to the invention of claim 2 is
(A) Sound-insulating layer composed of a high-specific-gravity filler and a binder component containing unvulcanized rubber as a main component, and (B) surface weight is 100 g.
/ M ² or more and 500 g / m ² or less, synthetic fiber nonwoven fabric layer,
And (A) a soundproof layer composed of a high-specific-gravity filler and a binder component containing unvulcanized rubber as a main component is laminated in this order, whereby the above object is achieved.

(High Specific Gravity Filler) The high specific gravity filler used in the present invention is preferably a filler having a specific gravity of 2 or more, more preferably 4 or more. When the specific gravity is less than 2, the vibration damping and soundproofing property is deteriorated. As the high-density filler, sand iron, iron powder, iron oxide, calcium carbonate, zircon sand, chromite sand, iron slag powder, silica sand, lead powder, tin oxide, zinc oxide, barium sulfate, iron sulfide, mica, aluminum hydroxide , Talc, clay, etc. are used.

The high specific gravity filler may be in the form of powder, fibrous, flaky, or the like.
From the viewpoint of mixing, powder is preferable. The particle size of the high specific gravity filler is preferably 3 μm to 2 mm. More preferably, it is 5 μm to 500 μm. If it exceeds 2 mm, it is difficult to uniformly mix, so that the performance of the obtained vibration damping and soundproofing material tends to be non-uniform, and the bulk density becomes too large.
It may be difficult to mix a large amount of high specific gravity filler. If it is less than 3 μm, the bulk specific gravity becomes too small, and it is difficult to mix a large amount of high-specific-gravity filler, so it is difficult to obtain a sheet with high specific gravity, and a vibration-damping and sound-insulating material with high vibration damping properties. May be difficult to obtain.

(Unvulcanized Rubber) Unvulcanized rubber used in the present invention includes natural rubber, SBR, NBR, CR, BR and IR.
Such a rubber is a rubber that has not been vulcanized. From the viewpoint of manufacturing, those which can be emulsified can be preferably used. For example, SBR emulsion, NB
R emulsion and the like can be preferably used.

(Ratio of high specific gravity filler and unvulcanized rubber contained in soundproof layer) The proportion of high specific gravity filler contained in the soundproof layer is preferably 85 to 99.5% by weight, more preferably 95 to 99. % By weight. High specific gravity filler content is 8
If it is less than 5% by weight, it is difficult to obtain a soundproof material having a high specific gravity and excellent impact sound insulation. Further, if it exceeds 99.5% by weight, uniform mixing with the binder component tends to be difficult.

The unvulcanized rubber preferably has a solid content weight of 0.5 based on 100 parts by weight of the high specific gravity filler.
˜15 parts by weight, more preferably 1 to 5 parts by weight. If the compounding amount is less than 0.5 part by weight, the high specific gravity filler is not sufficiently retained by the rubber, so that the strength of the obtained vibration damping and soundproofing material is lowered. If the compounding amount exceeds 15 parts by weight, the vibration damping and soundproofing property of the obtained vibration damping and soundproofing material is deteriorated.

Other components of the soundproof layer are, for example, a rubber used as a binder and a plasticizer for adjusting the softness of a urethane prepolymer that can be used as a gelling agent, a thickener, and a gelling agent. Processing aids such as and pigments may be blended. For example, the plasticizer includes DOP, the thickener includes methyl cellulose, and the gelling agent includes urethane prepolymer.

(Manufacturing Method of Soundproof Layer) As a manufacturing method of the soundproof layer, for example, the soundproof layer can be manufactured according to the following steps.

(1) A step of preparing an aqueous slurry containing an emulsion of a high specific gravity filler and an unvulcanized rubber, (2)
A step of applying the aqueous slurry onto a synthetic fiber non-woven fabric and laminating it, and (3) a step of drying and removing water in the slurry.

In the step (1), a mixer having a stirring blade, a screw type mixer or the like can be used for mixing the high specific gravity filler and the emulsion of unvulcanized rubber.

Water is preferably 20 to 40 parts by weight, and more preferably 1 to 100 parts by weight of the high specific gravity filler.
It is blended in a proportion of 0 to 25 parts by weight.

In the above step (2), as a method of shaping the aqueous slurry into a sheet, a method using an extruder, a spray coating method, etc. are used in addition to the above.
In addition, it can be shaped into a desired shape by press molding, cast molding, or the like.

As the base material to which the above-mentioned aqueous slurry is applied, wood panels such as plywood, gypsum board and the like may be used.

In the step (3), a usual method can be adopted as a heating method, and for example, a hot air heating furnace or a heating plate can be used.

(Synthetic fiber non-woven fabric layer) The synthetic fiber non-woven fabric used in the present invention is a synthetic fiber long-fiber non-woven fabric produced by, for example, having a synthetic fiber spinning step, a fiber web forming step and a bonding step. Say that.

Nylon, polyester, polyethylene, polypropylene and the like are preferably used as the raw material of the synthetic fiber. The material of the synthetic fiber non-woven fabric is not particularly specified, but the most commonly used polyester resin is suitable because of its proven track record. As a manufacturing method, any method such as a spunbond method, a melt flow method, a flash spinning method, a tow opening method, a burst fiber method, or a film method may be used.

The bonding method is usually thermal bonding, mechanical entanglement (needle punching, water punching), or adhesive bonding. According to these bonding methods, ear fraying occurs even if sewing fusion processing is not performed. Absent. In addition, by using the bonding method, the bulkiness and thickness of the nonwoven fabric can be freely changed, and the texture can be changed from soft to hard. The synthetic fiber nonwoven fabric used in the present invention is preferably relatively thick, that is, bulky, in order to enhance its impact force absorption.

Surface weight of synthetic fiber non-woven fabric, that is, basis weight
The preferred range of (g weight per m ² ) is 100 to 500 g.
/ M ² , and more preferably 150 to 300
It is in the range of g / m ² . When the surface weight is less than 100 g / m ² , the impact buffering effect becomes small, and when it exceeds 500 g / m ² , the walking feeling when constructed under the floor material may be impaired. The thickness of the synthetic fiber nonwoven fabric layer is preferably in the range of 1 mm to 5 mm. If it is less than 1 mm, the shock absorbing property is poor, and if it exceeds 5 mm, the feeling of walking may be deteriorated when the vibration damping and soundproofing material is installed under the floor material.

(Overall Structure of Damping and Soundproofing Material) The damping and soundproofing material of the present invention is characterized in that the soundproofing layer and the synthetic fiber nonwoven fabric layer are laminated.

This soundproofing material is usually used for a floor structure of a house such as plywood, particle board, OSB board, MDF.
It is used by being laminated and adhered in a sandwich form between floor base materials such as boards and floor finishing materials such as parquet flooring materials.

Since the bonding method is usually carried out using a solvent-based adhesive, as described above, when the synthetic fiber non-woven fabric layer, which is apt to be impregnated with the adhesive, has a construction problem, the method according to claim 2 is used. As shown, a laminated form in which a synthetic fiber non-woven fabric layer is arranged in the central portion is suitable. This is because, in the laminated form in which the synthetic fiber nonwoven fabric layer is exposed, not only the adhesive is difficult to apply, but also the original adhesiveness of the synthetic fiber nonwoven fabric layer may be deteriorated due to the soaked adhesive.

The thickness of the vibration damping and soundproofing material of the present invention is 2-1.
It is preferably 0 mm, more preferably 3 to 5 mm. If it is less than 2 mm, it is difficult to manufacture, and if it exceeds 10 mm, the vibration damping and soundproofing material becomes too heavy, resulting in poor workability.

[0029]

The vibration-damping and sound-proofing material of the present invention comprises a high-density filler, a sound-proofing layer composed of a binder component containing unvulcanized rubber as a main component, and a synthetic fiber nonwoven fabric layer. As described above, the soundproof layer has a high specific gravity by containing the high specific gravity filler, and is excellent in sound insulation. Further, in the soundproof layer, by using unvulcanized rubber having a large internal loss as a binder of a high specific gravity filler, a loss coefficient is large and vibration damping performance is excellent.

Further, in the vibration-damping and sound-proofing material of the present invention, the synthetic fiber nonwoven fabric layer is laminated, so that the vibration-damping and sound-proofing material can be provided with impact force absorption and exhibit sound absorbing and vibration damping effects. You can

Further, as described in the invention of claim 2, by disposing the synthetic fiber non-woven fabric layer between the upper and lower soundproof layers, the soundproof layer is adhered to the floor material when the vibration-damping soundproof material is adhered to the floor material. Can be fixed by using an adhesive, etc.
It is possible to eliminate the drawbacks of the synthetic fiber nonwoven fabric layer, which is difficult to apply the adhesive.

[0032]

【Example】

 (Example 1) 1. Raw materials used The following materials were used.

(Synthetic fiber nonwoven fabric layer) Spunbond polyester nonwoven fabric (4131N: Toyobo Co., Ltd. product) Face weight 130 g / m ² , thickness 1.5 mm This nonwoven fabric is characterized by a bulky entanglement method without using a binder. Since it has a large thickness for its surface weight, it has excellent shock absorption.

(Soundproofing layer) (1) High specific gravity filler: iron sand, specific gravity = 4.6, particle size = 50
Mesh pass (2) Unvulcanized rubber: Carboxy-modified styrene-butadiene rubber (SBR), emulsion with specific gravity = 1.0 (solid content concentration = 48%) is used (Japan Synthetic Rubber Co., Ltd. product: J
SR-0619) (3) Thickener: Methylcellulose (MC) (Shin-Etsu Chemical Co., Ltd. product: Metroze 90SH30000) (4) Plasticizer: Dioctyl phthalate (DOP) (Coating base material) Single-sided release paper: SJA70A SAN-A Chemical industry products 2. Manufacture of vibration damping and soundproofing material The vibration damping and soundproofing material was manufactured as follows.

(1) Slurry mixing process

[0036]

[Table 1]

The slurry having the above composition was stirred and mixed using a stirring blade.

(2) Slurry coating step The mixed slurry obtained in the above step (1) was coated on a release paper with a thickness of 1 mm using a mold and a knife coater.
Further, the above synthetic fiber nonwoven fabric was laminated thereon. Further, on the synthetic fiber non-woven fabric, a mixed slurry obtained in the above (1) was used to a thickness of 1 m by using a mold and a knife coater.
m was coated and laminated.

(3) Drying Step About 50 times the laminate having the three-layer structure obtained in the above step (2)
It was dried for 24 hours in a drying chamber kept at ° C.

Through the above steps (1) to (3), a vibration damping and soundproofing material was obtained.

The water used during the production was evaporated and removed in the drying step (3) and integrated without peeling between layers.

The characteristics of the obtained vibration damping and soundproofing material were as follows.

Total thickness = 3.0 mm Material composition of soundproof layer Sand iron 98.0% by weight Other binder components 2.0% by weight Total weight = 6.0 kg / m ² (Example 2) Slurry of Example 1 A vibration damping and soundproofing material was obtained in the same manner as in Example 1 except that the coating step (2) in Example 2 was changed as follows.

The slurry obtained in step (1) of Example 1 was applied to a release paper with a thickness of 2 mm by using a mold and a knife coater.

A synthetic fiber non-woven fabric was laminated thereon and lightly compressed to bond them.

The characteristics of the obtained vibration damping and soundproofing material were as follows.

Total thickness = 2.9 mm Soundproof layer material composition Sand iron 98.0% by weight Other binder components 2.0% by weight Total weight = 5.9 kg / m ² (Comparative Example 1) Synthesized in Example 1. A vibration damping and soundproofing material was obtained in the same manner as in Example 1 except that a fibrous nonwoven fabric was not used and a closed-cell foam sheet was used instead.

The closed-cell foam used was a polyethylene foam (thickness 1.2 mm, foaming ratio 20 times, trade name: Softlon Sekisui Chemical Co., Ltd. product).

The characteristics of the obtained vibration damping and soundproofing material were as follows.

Total thickness = 3.5 mm Soundproof layer material composition Sand iron 98.0% by weight Other binder components 2.0% by weight Total weight = 6.3 kg / m ² (Comparative Example 2) Synthesis in Example 1 As the fibrous nonwoven fabric, 6301A (manufactured by Toyobo Co., Ltd.), which is also a nonwoven fabric obtained by the spunbond method and having a surface weight of 30 g / m ² , was used, and the slurry coating step (2) of Example 1 was used. Example 1 except that is changed as follows.
A vibration damping and soundproofing material was obtained in the same manner as in.

The slurry obtained in the step (1) of Example 1 was applied to a release paper with a thickness of 2 mm by using a mold and a knife coater. The synthetic fiber non-woven fabric was laminated on this, lightly compressed and bonded.

The characteristics of the obtained vibration damping and soundproofing material were as follows.

・ Overall thickness = 2.3 mm ・ Soundproof layer material composition Sand iron 98.0% by weight Other binder components 2.0% by weight ・ Overall weight = 6.0 kg / m ² (evaluation) Light weight floor impact sound by reverberation chamber method Level Evaluation The soundproofing materials obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were
An adhesive floor and a nail were used together between a particle board having a thickness of 15 mm and a parquet flooring material having a thickness of 6.2 mm to prepare an evaluation floor.

This evaluation floor is placed between the upper and lower reverberation chambers of 2 m × 3 m.
Set in the opening.

A shock was applied to the floor by a tapping machine, and the noise level in the reverberation room on the lower floor was measured.

The results are shown in Table 2.

[0057]

[Table 2]

[0058]

According to the first aspect of the present invention, the soundproof layer has a high specific gravity and thus is excellent in sound insulation, and since the loss coefficient is large, the vibration damping performance is excellent. Furthermore, since the synthetic fiber non-woven fabric layer is laminated, it is possible to impart a cushioning property and a vibration damping property to the vibration damping and soundproofing material, and to exert the effect of absorbing and damping the sound.

Further, according to the invention of claim 2, in addition to the above-mentioned advantages of the vibration damping and soundproofing material of claim 1, the use of the synthetic fiber non-woven fabric layer lowers the adhesiveness to the floor material and the like. It can be resolved.

As described above, the vibration-damping and sound-proofing material of the present invention has an extremely high sound-proofing performance due to the high cushioning property and the vibration-damping property of the synthetic fiber nonwoven fabric layer and the sound-insulating property of the sound-proofing layer due to its high mass. high. In addition, the vibration damping and soundproofing material having the soundproofing layer on the surface is also effective as a soundproofing material for the wood flooring material because the surface has a good adhesive coating property.

Claims (2)

[Claims] 1. A soundproof layer comprising (A) a high specific gravity filler and a binder component containing unvulcanized rubber as a main component, and (B) a surface weight of 100 g / m ² or more and 500 g / m ² or less. A vibration-damping and sound-insulating material, characterized in that synthetic fiber non-woven fabric layers are laminated. 2. A soundproof layer comprising (A) a high specific gravity filler and a binder component containing unvulcanized rubber as a main component, and (B) a surface weight of 100 g / m ² or more and 500 g / m ² or less. A vibration-damping and sound-insulating material comprising a fibrous non-woven fabric layer, and (A) a high-density filler, and a sound-insulating layer composed of a binder component containing unvulcanized rubber as a main component, which are laminated in this order.