JPH09131824A - Damping soundproof material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damping soundproof material for a floor having excellent floor impact sound shielding properties. SOLUTION: The damping soundproof material 4 comprises a synthetic fiber nonwoven fabric layer 3, an open cell foam layer 2, a soundproof layer 1 containing a high-specific gravity filler and binder containing non-vulcanized rubber as main ingredient, wherein the layers 1 and 2 are laminated in this order. Since the layer 1 has high specific gravity, it has excellent sound shielding properties against other sound source, and since it has large loss coefficient, it has excellent damping performance. Further, since the open cell foam layers 2 are laminate don the upper and lower surfaces of the layer 1, impact force absorbing properties are given to the material 4 to perform the sound absorption and damping effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor vibration-damping and sound-insulating material for enhancing the sound-insulating performance of a building floor by arranging it between a building floor base and a floor material. The present invention relates to a vibration damping and soundproofing material suitable for use in a room.

[0002]

2. Description of the Related Art Conventionally, carpets are often attached to the floors of apartment houses, and floor impact noise from the upper floors has not been transmitted to the lower floors due to the softness of the carpets. However, in recent years, carpeting has been shifted to a wooden floor because of hygiene such as mite generation and maintenance. For this reason, floor impact noise, which was not a serious problem for carpeting, is becoming a serious problem for wooden floors.

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-63-2.
Japanese Patent Publication No. 59595 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 a floor impact.

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

[0006]

A vibration-damping and sound-proofing material according to the present invention comprises: (C) a synthetic fiber non-woven fabric layer; (B) an open-cell foam layer; (A) a high-density light filling material; A sound-insulating layer comprising a vulcanized rubber-based binder component, (B) an open-cell foam layer, and (C) a synthetic fiber non-woven fabric layer, which are laminated in this order. Is achieved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

(A) Soundproof Layer (A) -1 High Specific Gravity Filler Used in Soundproof Layer 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 specific gravity 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, fiber or scale, but powder is preferred from the viewpoint of mixing.

The particle size of the high specific gravity filler is 3 μm to 2 m.
m is preferred. More preferably, 5 μm to 500 μm
It is.

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,
In addition, the bulk specific gravity may become too large, and 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. Therefore, it is difficult to obtain a sheet having a high specific gravity, and a high damping property is obtained. It may be difficult to obtain a vibration damping material.

(A) -2 Unvulcanized Rubber Used in Soundproof Layer Unvulcanized rubber used in the present invention includes natural rubber, SBR,
It is a rubber such as NBR, CR, BR and IR, which is not vulcanized. From the viewpoint of manufacturing, those which can be emulsified can be preferably used. For example, S
BR emulsion, NBR emulsion and the like can be preferably used.

(A) -3 Ratio of high specific gravity filler and non-vulcanized rubber contained in the soundproof layer The ratio of high specific gravity filler contained in the soundproof layer is 85 to 9
9.5 wt% is preferable, and more preferably 95-99.
% By weight. When the content ratio of the high specific gravity filler is less than 85% by weight, it is difficult to obtain a high specific gravity filled soundproof layer excellent in impact sound insulation performance. Further, if it exceeds 99.5% by weight, uniform mixing with the binder component tends to be difficult.

The unvulcanized rubber has a solid content weight of preferably 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.

As components of the soundproof layer, 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, a gelling agent, etc. Processing aids, pigments and the like may be added.

For example, the plasticizer may be DOP, the thickener may be methyl cellulose, and the gelling agent may be urethane prepolymer. The urethane prepolymer as the gelling agent has NC at the end.
It is a crosslinked product having an O group and obtained by reacting with water.

The urethane prepolymer is a terminal NCO obtained by the reaction of a polyol and a polyisocyanate.
It is a group-containing prepolymer.

Examples of the polyol include polyoxyalkylene polyols such as polyethylene glycol and polypropylene glycol, polyester polyols, polycaprolactone polyols, dimer acid ester polyols, polycarbonate polyols, butadiene polyols, acrylic polyols, and ethylene-vinyl acetate copolymers. Hydrolyzate, chloroprene polyol, etc. are mentioned.

Examples of the polyisocyanate include tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polymethylene polyphenyl isocyanate (C-MDI), hexamethylene diisocyanate and xylylene diisocyanate (XD).
I), isophorone diisocyanate, hydrogenated XDI,
Examples include hydrogenated MDI.

The urethane prepolymer is preferably hydrophilic in consideration of dispersibility in an aqueous slurry. For example, as the polyol component, polyethylene glycol and polypropylene glycol are used in a molar ratio of 8
A prepolymer having a ratio of about 5:15, containing tolylene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI) as a polyisocyanate component, and having a ratio of terminal NCO of about 5% is preferably used. It

As the molecular weight of the prepolymer, the weight average molecular weight (Mw) is usually 8 × 10 ^{2 to} 3 × 10 ⁴ ,
Preferably 2 × 10 ³ to 2 × 10 ⁴ , the number average molecular weight (M
n) is 5 × 10 ² to 1 × 10 ⁴ , preferably 8 × 10 ² to
Those of 8 × 10 ³ are used.

The superposition ratio of the ignorant Ryu rubber and the crosslinked urethane resin in the binder component is preferably 5: 1 to 0.5: 1, and more preferably 3: 1 to 1: 1. When the weight ratio of the unvulcanized rubber to the cross-linked urethane resin exceeds 5: 1, the cross-linked urethane resin tends to be insufficient in preventing deformation by compression load. If the weight ratio of the unvulcanized rubber to the crosslinked urethane resin is less than 0.5: 1, the unvulcanized rubber tends to exhibit insufficient vibration damping performance.

(A) -4 Method for Producing Soundproof Layer The soundproof layer having the above structure can be produced, for example, according to the following steps.

(1): a step of preparing an aqueous slurry containing a high specific gravity filler and an emulsion of unvulcanized rubber, (2): applying the aqueous slurry onto a synthetic fiber nonwoven fabric or an open-cell foam sheet. And laminating, and (3): a step of drying and removing water in the slurry.

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

The water contained in the slurry is preferably 20 to 40 parts by weight with respect to 100 parts by weight of the high specific gravity filler.
More preferably, it is blended in a proportion of 10 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 method such as spray coating, and the like are used in addition to the above, and other methods such as press molding and cast molding. Thus, the desired shape, usually a sheet, can be formed.

In particular, when the synthetic fiber non-woven fabric layer and the foam layer are adhered, a method of applying an adhesive or a method of adhering a slurry by spray coating or the like can be used.

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 shaped or applied slurry,
The NCO group of the urethane prepolymer used reacts with water to form a crosslinked product by a urea bond, thereby gelling.

In this reaction, CO ₂ gas is generated, and the reaction product slurry has carbon dioxide gas bubbles. This general reaction is shown in formula (I) below.

2OCN-R-NCO + H ₂ O → OCN-R- (NHCONH) -R-NCO + CO ₂ (I) Since this reaction usually takes place at room temperature, heating is not required, but gelation does not occur. You may heat as a means to accelerate.

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

(B) Open Cell Foam Layer Generally, foams are mainly classified into two types. They are closed-cell foams typified by polyethylene foam and polystyrene foam, and open-cell foams typified by flexible polyurethane foam.

The distinction between closed cells and open cells is not clearly defined, but is usually determined by measuring the closed cell rate. (Measurement method: ASTM-D2856) The closed cell rate is a closed cell (complete bubble with no pores) present in the entire volume, which is expressed as a volume percentage.

A cell having a low closed cell rate, that is, a cell having a high open cell rate is called an open cell body. It is considered that when the open cell ratio becomes high, the air can move back and forth inside the foam, so that the sound absorbing property and the shock absorbing property become high. It is also considered that the compression set is small.

The preferred closed cell ratio of the open cell foam layer used in the present invention is 20% or less. If it exceeds 20%, for the above reason, the impact absorbability is lowered and the compression set is increased.

The open-cell foam layer is usually in the form of a sheet, and its thickness 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 walking feeling is deteriorated when the vibration damping and soundproofing material is installed under the floor material.

The material of the foam is not particularly limited, but the most commonly used soft polyurethane foam is suitable as it has a large track record as an impact cushioning material.

(C) Synthetic fiber non-woven fabric layer The synthetic fiber non-woven fabric layer is a layer formed by a synthetic fiber long-fiber non-woven fabric produced by having a synthetic fiber spinning step, a fiber web forming step and a bonding step.

As the synthetic fiber, nylon, polyester, polyethylene, polypropylene or the like is used.
As a manufacturing method, spun pond method, melt blow method,
Any method such as a flash spinning method, a tow opening method, and a burst fiber method may be used.

The preferred range of the basis weight (g weight per m ² ) of the synthetic fiber non-woven fabric is 10 to 150 g, more preferably 20 to 50 g. If the basis weight is less than 10 g, the accuracy of the non-woven fabric is likely to cause a problem.
If it exceeds 50 g, the adhesive permeates the nonwoven fabric when the adhesive is applied to the floor so that the work becomes difficult.

As the material of the synthetic fiber non-woven fabric, any one kind of polyester, polyethylene, rayon and glass may be used alone or a mixture of two or more kinds may be used, among which polyester, polyethylene and rayon are preferable. The basis weight is preferably 30 to 50 g / m ² for adhering to a floor material.

(D) Overall structure of vibration damping and soundproofing floor material The vibration damping and soundproofing floor material is formed by laminating the vibration damping and soundproofing material on a wooden layer.

Here, the wood layer refers to a wood panel that is usually used for a floor structure such as a base material or finishing material for a house. Examples of such a wood layer include floor base materials such as plywood, particle board, OSB (orientated strand board) and MDF board (medium density fiber board), and floor finishing materials such as parquet flooring. To be

In this vibration damping and soundproofing floor material, the vibration damping and soundproofing material of the present invention may be laminated on at least one side or both sides of the wood layer, or between the two woody layers, the vibration damping and soundproofing material may be formed. A floor material on which materials can be laminated.

When used as a floor material, it is preferably used as a base material because it is used with a vibration damping and soundproofing material provided between a base material and a finishing material. When it is used as a finishing material, it is laminated on the upper surface of the wooden layer when it is used.

The vibration-damping and sound-insulating material of the present invention is usually used by being laminated and adhered in a sandwich form between the floor base material and floor finishing material such as parquet flooring material.

The bonding method is usually carried out using a solvent-based adhesive.

On the other hand, when the open-cell foam layer constituting the vibration-damping and sound-proofing material of the present invention is bonded to the synthetic fiber non-woven fabric layer, when an adhesive is used, preferably a non-thinner type adhesive is applied. Then, a method of adhesively laminating or a method of adhesively laminating by spraying an aqueous slurry used in the production of the soundproof layer is used.

By the way, in the laminated form in which the open-cell foam layer is exposed, not only is it difficult to apply the adhesive, but the impregnated adhesive may greatly reduce the original cushioning property of the open-cell foam layer. .

The thickness of the vibration damping and soundproofing material of the present invention is 2-1.
It is preferably 5 mm, more preferably 3 to 10 mm. If it is less than 2 mm, it becomes difficult to manufacture, and if it exceeds 15 mm, the vibration damping and soundproofing material becomes too heavy, resulting in poor workability.

As shown in FIG. 1, the vibration damping and soundproofing material 4 of the present invention.
Is characterized in that it has a five-layer structure in which synthetic fiber nonwoven fabric layers 3 and 3 are laminated on the upper and lower two outermost layers, open cell foam layers 2 and 2 are laminated on the inner upper and lower two layers, and a soundproof layer 1 is laminated in the center. Have.

The synthetic fiber non-woven fabric layer 3 is mainly for adhesive workability with the wood layers which can be disposed on the upper and lower surfaces thereof.

The reason why two open-cell foam layers 2 are provided on the upper and lower surfaces of the soundproof layer 1 is to reduce the impact force generated on the floor due to the low elastic modulus of the foam layer 2.
The effect is increased by providing two layers.

Further, since the soundproof layer 1 has a high specific gravity, it is excellent in sound insulation from other sound sources, and has a large loss coefficient, so that it is excellent in vibration damping performance.

Due to the synergistic effect of the above points, the vibration damping and soundproofing material having the five-layer structure of the present invention has a high soundproofing property as a whole.

The operation will be described below.

The vibration damping and soundproofing material of the present invention comprises a high specific gravity filler and
A soundproof layer composed of a binder component containing unvulcanized rubber as a main component, and an open cell foam layer are laminated. The soundproof layer has a high specific gravity by containing a high specific gravity filler, and is excellent in soundproofing against other sound sources. Further, in the soundproof layer, a non-vulcanized rubber having a large internal loss is used as a binder for the high specific gravity filler, so that the loss coefficient is large and the vibration damping property is excellent.

When the soundproof layer contains a urethane prepolymer as a gelling agent, carbon dioxide gas is generated when the terminal NCO group of the urethane prepolymer reacts with water to form a crosslinked gel, and The mixed slurry of the filler and the rubber emulsion is dried by gelling the mixed slurry, and the mixed slurry of the filler and the rubber emulsion is simply dried by gelating the mixed slurry of the filler and the rubber emulsion. It is possible to obtain a molded product having a higher porosity than the molded product obtained as described above.

Since the vibration-damping and sound-insulating flooring material of the present invention laminated with the vibration-damping and sound-absorbing material is formed by laminating the vibration-damping and sound-absorbing material on the wood layer, it is possible to obtain the vibration-damping and sound-proofing property in terms of vibration-damping property and shock absorbing property. Is high.

Further, in the vibration damping and soundproofing material of the present invention, since the foamed foam layer is laminated, the vibration damping and soundproofing material is provided with shock absorbing power absorption property and at the time of movement of air due to the open cells. It is possible to exert the effect of sound absorption and damping by the friction.

Further, the synthetic fiber non-woven fabric layer on the surface is also effective as a soundproofing material for wood flooring materials because it has a good adhesive coating property.

Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. The evaluation items in the examples of the present invention are as follows.

[0066]

【Example】

 (Example 1) (A) The following raw materials were used.

(1) Synthetic fiber non-woven fabric layer Spunbond polyester non-woven fabric (6301A: manufactured by Toyobo Co., Ltd.) Weighted tatami mat 30 g / m ² (2) Open cell foam layer (2) -1 Soft polyurethane foam sheet (Soflan ether foam 360s) : Toyo Tire & Rubber Co., Ltd. West Japan Co., Ltd.)
Thickness 2.5 mm (2) -2 Adhesive: Adhesive for wood flooring "Aqueous one-component type / non-thinner" (Sekisui Bond; Sekisui Chemical Co., Ltd.) (3) Soundproof layer (3) -1 High specific gravity filler: Sand iron, specific gravity = 4.6, particle size = 50 mesh pass (3) -2 Unvulcanized rubber: carboxy-modified styrene-butadiene rubber (SBR), emulsion with specific gravity = 1.0 (solid content concentration = 48%) Use (Nippon Synthetic Rubber Co., Ltd .: JSR-0619) (3) -3 Thickener = methylcellulose (MC) (Shin-Etsu Chemical Co., Ltd .: Metroze 90SH30000) (B) Manufacture of vibration damping and sound insulating materials Manufactured in this way.

(1) Slurry mixing step

[0069]

[Table 1]

The slurries having the formulations shown in Table 1 above were mixed using a stirring blade.

The above wood flooring adhesive was thinly applied onto the above-mentioned synthetic fiber non-woven fabric, and immediately above the above-mentioned soft polyurethane foam sheets were adhesively laminated, and two sheets were prepared in advance.

(2) Slurry coating step The mixed slurry obtained in the above step (1) was applied in a thickness of 1 mm onto a flexible polyurethane foam sheet on which the synthetic fiber nonwoven fabric was adhesively laminated using a mold and a knife coater. Layered.

Finally, another soft polyurethane foam sheet having the above-mentioned synthetic fiber non-woven fabric adhered and laminated thereon was placed on this, lightly compressed and adhered.

(3) Drying Step About 50 layers of the 5-layer structure laminate 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 production was removed by evaporation during the drying step (3), and was integrated without peeling between layers.

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

Total thickness = 6.0 mm Material composition of soundproof layer Sand iron: 98.0% by weight Binder component: 2.0% by weight Total weight = 3.5 kg / m ² The reverberation room method described below was used to evaluate the floor impact noise level. Table 2 shows the evaluation results.

(Example 2) A vibration damping and soundproofing material was obtained in the same manner as in Example 1 except that the slurry coating step (2) in Example 1 was changed as follows.

The slurry obtained in step (1) of Example 1 was applied onto the above synthetic fiber nonwoven fabric by spray coating, and then a flexible polyurethane foam sheet was adhesively laminated.
Two pieces of this were prepared in advance.

The mixed slurry obtained in the above step (1) was applied and laminated to a thickness of 1 mm on a soft polyurethane foam sheet laminated and adhered with the synthetic fiber nonwoven fabric using a mold and a knife coater.

Finally, another soft polyurethane foam sheet having the above-mentioned synthetic fiber non-woven fabric adhered and laminated was placed on this and lightly compressed and adhered.

A soft polyurethane foam sheet was laminated on it and lightly compressed to bond them.

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

Total thickness = 6.5 mm Soundproof material composition Sand iron 98.0% by weight Other binder components 2.0% by weight Total weight = 4.3 kg / m ² The vibration damping and soundproofing material obtained was reverberated as described later. The room floor method was used to evaluate the floor impact noise level. Table 2 shows the evaluation results.

(Comparative Example 1) In the same manner as in Example 1, except that a closed cell foam layer was used as a substitute for the open cell foam layer (soft polyurethane foam sheet) in Example 1, vibration damping and soundproofing. I got the material.

The closed cell foam used was a polyethylene foam (thickness 1.2 mm, expansion ratio 20 times, manufactured by Sekisui Chemical Co., Ltd.).

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

Total thickness = 4.0 mm Soundproof material composition Sand iron 98.0% by weight Other binder component 2.0% by weight Total weight = 3.8 kg / m ² The light-weight floor impact noise level was evaluated by the reverberation room method. Table 2 shows the evaluation results.

Comparative Example 2 A vibration damping and soundproofing material was prepared in the same manner as in Example 1 except that the open cell foam layer was not used and the slurry coating step was changed as follows. Obtained.

The mixed slurry was applied and laminated in a thickness of 2 mm on a synthetic fiber non-woven fabric using a mold and a knife coater.

A synthetic fiber non-woven fabric was laminated on this, lightly compressed and bonded. The properties of the obtained vibration damping and soundproofing material were as follows.

・ Total thickness = 1.5 mm ・ Soundproof material composition Sand iron 98.0% by weight Other binder components 2.0% by weight ・ Total weight = 3.1 kg / m ² The room floor method was used to evaluate the floor impact noise level. Table 2 shows the evaluation results.

(Comparative Example 3) Thickness 15 used in Example 1
Only the mm particle board was evaluated for the lightweight floor impact noise level by the reverberation room method described later. Table 2 shows the evaluation results.

(Evaluation) The lightweight floor impact noise level was evaluated by the reverberation room method.

The above-mentioned Examples 1 to 2 and Comparative Examples 1 to 1
Regarding the particle board laminated with the vibration damping and soundproofing material manufactured in Comparative Example 2, the thickness of the particle board of Comparative Example 3 in which the vibration damping and soundproofing material is not laminated is 15 mm so that the vibration damping and soundproofing material is on top. The particle boards were respectively applied as floor structure base materials provided in the opening of 2 m × 3 m between the upper and lower reverberation chambers, and then on the vibration damping and soundproofing materials (for the particle board of Comparative Example 3, directly on it). ), A parquet flooring material having a thickness of 6.2 mm was used in combination with an adhesive and nails to prepare an evaluation floor.

Next, a shock was applied by a tapping machine to the above-mentioned floor for evaluation, the noise level in the reverberation room on the lower floor was measured, and the relative evaluation was made according to the following criteria.

B: Good 8 Odb at a noise level of 500 Hz
Less and less than 70 db at 1000 Hz B: Slightly good Noise level is 80 d at 500 Hz
Only one of the conditions below b or less than 70 db at 1000 Hz x: Defect 80d at a noise level of 500 Hz
b or more and 70 db or more at 1000 Hz

[0099]

[Table 2]

[0100]

As described above, the vibration damping and soundproofing material of the present invention is excellent in sound insulation from other sound sources because the soundproofing layer has a high specific gravity.
Moreover, since the loss factor is large, it has excellent vibration damping performance. Furthermore, since the open-cell foam layers are laminated on the upper and lower surfaces of the soundproof layer, respectively, it is possible to impart impact force absorption to the vibration damping and soundproofing material, and to exert sound absorbing and damping effects.

Therefore, the vibration-damping and sound-insulating material of the present invention is totally sound-proof due to the high cushioning property and vibration-damping property of the open-cell foam layer and the sound-insulating property of the sound-insulating layer against other sound sources due to its high mass. Extremely high performance. 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.

[Brief description of the drawings]

FIG. 1 shows a sectional view of a vibration damping and sound insulating material of the present invention.

[Explanation of symbols]

 1 Soundproof Layer 2 Open Cell Foam Layer 3 Synthetic Fiber Nonwoven Layer 4 Vibration Damping Soundproof Material

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G10K 11/16 G10K 11/16 D 11/162 A

Claims (1)

[Claims] 1. A soundproof layer comprising (C) a synthetic fiber non-woven fabric layer, (B) an open cell foam layer, (A) a high specific gravity filler and a binder component containing unvulcanized rubber as a main component, (B) ) A vibration-damping and sound-insulating material, characterized in that an open-cell foam layer and (C) a synthetic fiber nonwoven fabric layer are laminated in this order.