JPH10180919A - Vibration damping sheet and vibration damping material - Google Patents

Abstract

(57) [Problem] To provide a vibration-damping and sound-insulating sheet and a vibration-damping and sound-insulating material which do not require a laminating step using a pressure-sensitive adhesive or an adhesive, have a large vibration-damping and sound-insulating effect, and are excellent in workability. SOLUTION: This is a vibration damping sound insulating sheet in which a protective layer made of paper is laminated on at least one surface of the vibration damping sound insulating layer, wherein the vibration damping sound insulating layer contains a high specific gravity filler and an emulsion of non-vulcanized rubber. It is formed from an aqueous slurry and a composition comprising a water-crosslinkable urethane prepolymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration-damping sound-insulating sheet and a vibration-damping sound-insulating material used for a vibration damping and sound-insulating material of a house or the like.
More specifically, the present invention relates to a vibration-damping and sound-insulating sheet and a vibration-damping and sound-insulating material that can be used for walls of a house or the like to prevent vibration and noise.

[0002]

2. Description of the Related Art Conventionally, gypsum board has a specific gravity of 0.65 to 0.65 due to its excellent cutting property and workability with a cutter.
0.95 gypsum board is commonly used as a typical building interior material. However, gypsum cured products
In general, gypsum board has a drawback that it is easily broken, so that the gypsum core is covered with a gypsum board base paper or the like to make it easy to break.

[0003] On the other hand, in recent years, demand for sound insulation for houses has been increasing, and studies have been made to provide gypsum boards with sound insulation. The gypsum core used for the gypsum board generally has a small specific gravity of about 0.6 to 1.4, so that the sound insulation property due to the surface density was insufficient. However, when the specific gravity is increased to increase the surface density of the gypsum core in order to improve the sound insulation, the gypsum core itself becomes hard, and the workability, for example, the nailing property is reduced, or it becomes difficult to cut with a cutter. There was a problem.

For example, Japanese Patent Application Laid-Open No. 8-42111 discloses a gypsum core having a specific gravity of 1 to 1.6 in which 0.5 to 5 parts by weight of fiber is dispersed with respect to 100 parts by weight of calcined gypsum. A gypsum board which has been improved in easiness of cracking, sound insulation, rigidity and impact resistance by coating with base paper has been proposed. However, when the specific gravity of the gypsum core was 1 to 1.6, the surface density was small and the sound insulation was still insufficient.

In order to improve the sound insulation of a gypsum board, a method of laminating a vibration-damping and sound-insulating sheet on one side of a gypsum board has been proposed. As a vibration damping sound insulation sheet, for example,
An adhesive-processed lead sheet is used. Furthermore, for example, a binder (binder) such as a thermoplastic resin, rubber or asphalt, and a high specific gravity filler (filler) such as iron sand, slag, and iron powder are kneaded and processed into a sheet, and the surface thereof is formed. A structure in which a vibration-damping and sound-insulating sheet having a nonwoven fabric laminated thereon is laminated on one surface of a gypsum board with an adhesive has been proposed (Japanese Patent Publication No. 4-67777).

However, the method of laminating the vibration-damping and sound-insulating sheet on one side of the gypsum board has a problem that a lamination step using an adhesive or an adhesive is required separately.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration damping and sound insulating layer and a gypsum layer which are laminated in a process of forming a vibration damping and sound insulating layer, so that a laminating step using an adhesive or an adhesive is not required. It is an object of the present invention to provide a vibration-damping and sound-insulating sheet and a vibration-damping and sound-insulating material which have a large vibration damping and sound insulating effect and are excellent in workability.

[0008]

According to a first aspect of the present invention, a vibration-damping and sound-insulating sheet according to the first aspect of the present invention has a protective layer made of paper laminated on at least one surface of the vibration-damping and sound-insulating layer. A vibration damping and sound insulating sheet, wherein the vibration damping and sound insulating layer comprises:
It is characterized by being formed from an aqueous slurry containing a high specific gravity filler and an emulsion of unvulcanized rubber, and a composition comprising a water-crosslinkable urethane prepolymer.

The invention according to claim 2 of the present invention (hereinafter referred to as "second
The vibration-damping and sound-insulating sheet is a vibration-damping and sound-insulating sheet in which protective layers are laminated on both sides of the vibration-damping and sound-insulating layer, wherein at least one of the protective layers is made of paper,
It is characterized by being formed from an aqueous slurry containing a high specific gravity filler and an emulsion of unvulcanized rubber, and a composition comprising a water-crosslinkable urethane prepolymer.

The invention according to claim 3 of the present invention (hereinafter referred to as “third”)
The vibration-damping and sound-insulating material is a vibration-damping and sound-insulating material in which a gypsum layer is laminated with a vibration-damping and sound-insulating layer, and the vibration-damping and sound-insulating layer is made of a high specific gravity filler and a non-vulcanized rubber. It is characterized by being formed from an aqueous slurry containing an emulsion and a composition comprising a water-crosslinkable urethane prepolymer.

The invention described in claim 4 of the present invention (hereinafter referred to as the fourth
The vibration-damping and sound-insulating material according to the present invention is characterized in that the vibration-damping and sound-insulating sheet according to claim 1 or 2 is laminated on at least one surface of a gypsum layer.

The vibration-damping and sound-insulating layer used in the present invention is composed of a high specific gravity filler and an unvulcanized rubber emulsion (binder component).
And a composition comprising a water-crosslinkable urethane prepolymer.

The high specific gravity filler is obtained by crushing iron ore into fine powder; converter slag, rolling scale, pickling scale, and B produced in iron making, rolling, and surface treatment processes.
F cast floor scale; These have a specific gravity of 4.5 to 5.5 containing iron oxide as a main component.

The particle size of the high specific gravity filler is preferably 2 mm or less, more preferably 5 to 500 μm. If the particle size exceeds 2 mm, it becomes difficult to mix uniformly, so that the performance of the obtained vibration damping and sound insulating sheet may be uneven.
The shape of the high specific gravity filler is not particularly limited, but various shapes such as fibrous, spherical, granular, and flake shapes can be used.

When one or more light metal-based fillers selected from the group consisting of carbonates and hydroxides of light metals having a specific gravity of 2.0 to 3.0 are used in combination with the iron oxide-based high specific gravity filler, the vibration damping and sound-insulating layer is further improved. Rigidity and density can be improved.

The light metal-based filler includes, for example, calcium carbonate, magnesium hydroxide, sodium carbonate, etc. Among them, calcium carbonate and magnesium hydroxide are preferably used. The particle size of these light metal-based fillers is preferably 2 to 60 μm.

The compounding ratio of the high specific gravity filler in the vibration damping sound insulating layer is preferably 70 to 99.5% by weight, more preferably 80 to 99%. If the compounding ratio of the high specific gravity filler is less than 70% by weight, the areal density is lowered, and it becomes difficult to obtain a sufficient vibration damping and sound insulating effect. If the compounding ratio exceeds 99.5% by weight, a rubber emulsion as a binder component is not obtained. It becomes difficult to mix uniformly.

Examples of the rubber emulsion include natural rubber, SBR (styrene butadiene rubber), N
Emulsions of unvulcanized rubber such as BR (nitrile butadiene rubber), CR (chloroprene rubber), BR (butadiene rubber), and IR (isoprene rubber).

As the rubber emulsion, it is preferable to use, for example, an SBR emulsion, an NBR emulsion or the like from the viewpoint of easy formation of the vibration damping and sound insulating sheet. In addition, when the above-mentioned emulsion is used, it is preferable to mix and adjust the filler to form a slurry, because the handleability and the molding efficiency are improved.

When an aqueous slurry is prepared using the above-mentioned rubber emulsion, a method of mixing a filler with the emulsion and adding water as a dispersant to form a slurry is preferred. To the aqueous slurry, a plasticizer such as DOP (dioctyl phthalate), a thickener such as methyl cellulose, a processing aid, a pigment, and the like may be added to adjust the viscosity.

The urethane prepolymer is used as a gelling agent, and is a prepolymer containing an NCO group at a terminal obtained by a reaction between a polyol and a polyisocyanate. To form

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. Examples include a hydrolyzate of a union and chloroprene polyol.

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

The urethane prepolymer is preferably hydrophilic in consideration of dispersibility in an aqueous slurry. For example, the polyol component contains polyethylene glycol and polypropylene glycol in a molar ratio of about 85:15, the isocyanate component contains tolylene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI), and the terminal NCO A prepolymer having a group ratio of about 5% can be suitably used.

The molecular weight of the above prepolymer is usually from 800 to 30,000 in weight average molecular weight (Mw).
0, more preferably 2,000 to 20,000.
0, and a number average molecular weight (Mn) of 500 to 1
000 is preferred, and more preferably 800 to 8.0.
00.

In the composition comprising the aqueous slurry and the water-crosslinkable urethane prepolymer, the mixing ratio of the rubber emulsion (solid content) and the water-crosslinkable urethane prepolymer is determined by the reaction rate, molecular weight, temperature and the like. However, the weight ratio is preferably 30: 1 to 0.5: 1, and more preferably 10: 1 to 1: 1. When the rubber emulsion has a weight ratio of 3 to the water-crosslinkable urethane prepolymer,
If the ratio is more than 0: 1, shape retention at the time of manufacturing is impaired, and if the weight ratio is less than 0.5: 1, the rubber exhibits insufficient vibration-damping and sound-insulating performance.

The vibration-damping and sound-insulating sheet of the first invention is obtained by laminating a protective layer made of paper on at least one surface of the vibration-damping and sound-insulating layer.

The paper (recycled paper) used for the protective layer is preferably a gypsum board base paper conventionally used for a gypsum board, and its basis weight is 150 to 300.
g / m ² , more preferably 180-200 g
/ M ² . If the basis weight is less than 150 g / m ² , the strength is insufficient, and if it exceeds 300 g / m ² , the cost increases.

The vibration-damping and sound-insulating layer is formed by applying a composition comprising the aqueous slurry and the water-crosslinkable urethane prepolymer to paper using a coating plate or a coating roll and drying.

In the above composition, the reaction of the water-crosslinkable urethane prepolymer usually proceeds at room temperature, but gelation (crosslinking) can be promoted by heating. However, if the temperature of the composition is too high, the reaction speeds up, but it is difficult to control gelation during coating, so that it is difficult to obtain sufficient thickness accuracy.

The laminate of the vibration-damping and sound-insulating layer and the paper is dried to remove water, and a vibration-damping and sound-insulating sheet can be obtained. The drying method is not particularly limited, and a conventionally known method can be employed.

The thickness of the vibration-damping and sound-insulating layer is preferably from 1 to 7 mm, more preferably from 2 to 5 mm. When the thickness of the vibration-damping and sound-insulating layer is less than 1 mm, the vibration-damping and sound-insulating properties are insufficient, and the production is also difficult. Further, when the thickness of the vibration damping sound insulating layer is 7
If it exceeds mm, it may become too heavy and may hinder conveyance during construction.

Next, the second invention will be described. The vibration-damping and sound-insulating sheet of the second invention has a structure in which protective layers are laminated on both sides of the vibration-damping and sound-insulating layer, and paper is used for at least one of the protective layers. Examples of the paper used for at least one of the protective layers of the vibration damping and sound insulating sheet include the same gypsum board base paper as in the first invention.

The vibration-damping and sound-insulating layer used in the second invention is formed by applying the composition comprising the aqueous slurry and the water-crosslinkable urethane prepolymer to the protective layer using the same coating plate or coating roll as in the first invention. It is formed by coating and drying.

The thickness of the vibration-damping and sound-insulating layer is preferably 1 to 7 mm, more preferably 2 to 5 mm, for the same reason as the vibration-damping and sound-insulating sheet of the first invention.

Next, a description will be given of the vibration damping and sound insulating of the third invention. The vibration-damping and sound-insulating material according to the third invention is obtained by laminating the vibration-damping and sound-insulating layer on at least one surface of a gypsum layer.

The vibration-damping and sound-insulating layer used in the third invention is a gypsum layer formed from the above-mentioned aqueous slurry and the water-crosslinkable urethane prepolymer by using the same coating plate or coating roll as in the first invention. It is formed by coating and drying.

The thickness of the vibration-damping and sound-insulating layer is preferably 1 to 7 mm, more preferably 2 to 5 mm, for the same reason as the vibration-damping and sound-insulating sheet of the first invention.

As the gypsum layer, for example, a gypsum board (commercially available) is used. The gypsum board is a hardened gypsum in which α-type hemihydrate gypsum or β-type hemihydrate gypsum is hydrated, and the specific gravity of the gypsum board is preferably from 1 to 1.6, more preferably from 1.2 to 1.4. is there.

The α-type or β-type hemihydrate gypsum (calculated gypsum)
In addition to natural gypsum and chemical gypsum, flue gas desulfurization gypsum etc. generated in the flue gas desulfurization process of exhaust gas (including sulfur disulfide) generated when burning coal and petroleum are obtained by firing in water or air. be able to. The calcined gypsum includes β-type and α-type. Β-type is obtained by firing in the air, and α-type is obtained by firing in water. Β-type calcined gypsum is usually used for the production of gypsum board.

In the production of the gypsum board, either β-type or α-type calcined gypsum may be used. When using β-type calcined gypsum for the production of gypsum board, a suspension of gypsum powder is prepared using water of 70 to 80% by weight based on β-type calcined gypsum. In addition, when α-type calcined gypsum is used for the production of gypsum board, a suspension of gypsum powder is usually prepared using 35 to 45% by weight of water. This suspension is, for example, 2
A hard plaster board is obtained by pouring and drying between sheets of base paper.

The specific gravity of the gypsum board is determined by the amount of water to be added (mixing water amount). The smaller the mixing water amount, the higher the specific gravity, and the strength of the gypsum board tends to increase.

In the above-mentioned suspension of gypsum powder, as an additive, a foaming agent such as sodium alkylbenzenesulfonate; a starch such as corn starch for improving the adhesion between the gypsum core and the base paper for gypsum board; Aggregates such as pearlite for weight reduction; gypsum hardening regulators such as potassium sulfate; strength reinforcing agents such as inorganic fibers such as glass fibers and organic fibers such as waste paper pulp may be added. .

The above-mentioned vibration-damping and sound-insulating layer is obtained by applying the above composition to a gypsum layer using the same coating plate or coating roll as in the first invention.
It is formed by drying.

In the vibration damping and sound insulating sheet of the third invention, the vibration damping and sound insulating layer is formed on at least one surface of the gypsum layer, but the surface of the gypsum layer, the surface of the vibration damping and sound insulating layer, or the gypsum layer and the vibration damping and sound insulating layer. It is preferable to provide a protective layer at the interface with the substrate. Further, it is preferable to use paper (recycled paper) for at least one of the protective layers, and it is particularly preferable to use the same gypsum board base paper as in the first invention.

By using the gypsum board base paper for the protective layer, it is obvious that even when the gypsum layer is in contact with the protective layer, even when the vibration-damping and sound-insulating layer is in contact with the protective layer, especially the rubber in the composition is used. Emulsion components are less likely to penetrate than when nonwoven fabric of recycled fibers such as synthetic fibers and rayon is used as a protective layer, and therefore it is difficult for them to accumulate on the contact surface such as a conveyor belt during production. The use of base paper is preferred.

The above-mentioned other protective layer includes the above-mentioned gypsum board base paper having moisture permeability when dried; non-woven fabric such as synthetic fiber and recycled fiber such as rayon; polyvinyl chloride, vinylon, nylon, phenolic resin, fluororesin And open-cell foams such as polyurethane resins.

Next, the vibration damping and sound insulating material of the fourth invention will be described. The vibration-damping and sound-insulating material of the fourth invention has the gypsum layer on which the vibration-damping and sound-insulating layer of the first invention or the second invention is formed.

The vibration damping sound-insulating layer used in the fourth invention is a gypsum layer made of the above-mentioned composition comprising the aqueous slurry and the water-crosslinkable urethane prepolymer by using the same coating plate or coating roll as in the first invention. It is formed by coating and drying.

The thickness of the vibration-damping and sound-insulating layer is preferably 1 to 7 mm, more preferably 2 to 5 mm, for the same reason as the vibration-damping and sound-insulating sheet of the first invention.

As the gypsum layer used in the fourth invention, for example, the same gypsum board (commercially available) as in the first invention is used.

[0052]

DETAILED DESCRIPTION OF THE INVENTION Preparation of water-based slurry 750 parts by weight of iron sand (specific gravity: 4.6, particle size: 200 mesh pass) as a high specific gravity filler, and carboxy-modified SBR emulsion (manufactured by Nippon Synthetic Rubber Co., Ltd.) as an emulsion of unvulcanized rubber 40 parts by weight of "JSR-0619", specific gravity 1.0, solid content 48% by weight, methylcellulose ("Metroze 90SH30000" manufactured by Shin-Etsu Chemical Co., Ltd.) as a thickening agent.
An aqueous slurry was prepared by stirring and mixing 3 parts by weight and 100 parts by weight of water as a dispersant.

Water-Crosslinkable Urethane Prepolymer As a water-crosslinkable urethane prepolymer, a mixture containing tolylene diisocyanate and a polyol [polyethylene glycol: polypropylene glycol = 85: 15 (molar ratio)] [“Monotac” manufactured by Daiichi Kogyo Seiyaku Co., Ltd. 30
5 ", weight average molecular weight (Mw) = 3200, number average molecular weight (Mn) = 1200, Mw / Mn = 2.7, specific gravity 1.
1] was used.

Example 1 A gypsum board having a protective layer (200 g / m ² gypsum board base paper) on both sides with a composition obtained by stirring and mixing 100 parts by weight of the aqueous slurry and 1 part by weight of a water-crosslinkable urethane prepolymer. (Commercially available, 12.5m
A m-thickness x 910 mm x 1820 mm) was applied using a mold and a knife coater to form a 2 mm-thick vibration-damping and sound-insulating layer (iron sand 95 wt%, binder component 5 wt%).
Further, a gypsum board base paper (200 g / m ² ) similar to the above was laminated as a protective layer on the vibration damping sound insulating layer. The laminate having the five-layer structure is dried and cured in a drying furnace maintained at about 50 ° C. for 5 hours, cut into predetermined dimensions, and subjected to vibration damping and sound insulating sheets (14 mm thick × 910 mm × 1820 mm, 24 k
g) was obtained. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

(Example 2) Using a mold and a knife coater on the same protective layer (plaster board base paper) as in Example 1,
After applying the same vibration-damping and sound-insulating layer (2 mm thick) as in Example 1, 120 parts by weight of β-gypsum, 90 parts by weight of water and 0.03 parts by weight of sodium alkylbenzene sulfonate as a foaming agent were stirred and mixed using a mixer. The resulting suspension was applied to form a gypsum layer, and a protective layer (plaster board base paper) similar to that of Example 1 was further laminated on the gypsum layer. Next, the laminate was dried and cured in a drying furnace maintained at 70 ° C. for 24 hours to obtain a vibration damping and sound insulating sheet. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

Example 3 2 mm thick spunbond polyester nonwoven fabric (basis weight 30 g / m ² ) as a protective layer
Was obtained on the opposite side of the gypsum layer of the vibration-damping and sound-insulating layer in the same manner as in Example 1. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

Example 4 As a protective layer, a flexible polyurethane foam having a thickness of 1.5 mm (manufactured by Bridgestone Chemical Co., Ltd.)
A vibration-damping and sound-insulating sheet was obtained in the same manner as in Example 1, except that open cells (30-fold foam) were laminated on the side of the vibration-damping and sound-insulating layer (2 mm thick) opposite to the gypsum layer. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

(Comparative Example 1) A 2 mm thick asphalt-based vibration damping sheet [Super Shizu, sold by Sumisho Metal Co., Ltd., surface density 5 kg / m ² , spunbond polyester non-woven fabric on both sides (weight per unit area: 70 g / m ² )] It was laminated on a commercially available gypsum board (area density 10 kg / m ² ) using a vinyl acetate emulsion adhesive (“Sekisui Woodwork Bond” manufactured by Sekisui Chemical Co., Ltd.).

Comparative Example 2 A 12 mm thick gypsum board (area density: 9.5 kg / m ² ) was used.

With respect to the vibration-damping and sound-insulating sheets obtained in the above Examples and Comparative Examples, the following performance evaluations (1) and (2) were carried out, and the results are shown in Table 1. (1) Measurement of transmitted sound A damping sound insulation sheet was installed on the partition wall of a unit type prefabricated house ("Sekisui Heim" manufactured by Sekisui Chemical Co., Ltd.) and JIS.
The inter-room sound pressure level difference was measured according to the measurement method and the sound insulation grade according to A1417. In addition, the vibration-damping and sound-insulating sheet was constructed such that the gypsum core was on the indoor side.

(2) Evaluation of Cutability After a 50 cm square sample was prepared from the vibration damping and sound insulating sheet, as shown in FIG.
A square piece of cm square was laid, a ruler was applied to the cut surface, a cut was made at once using a cutting NT cutter, and cutting was attempted.
It was confirmed whether or not the rear end of the blade having been inserted was broken by hand. When a single cut did not cause breakage, multiple cuts were made and the number of breaks was measured. It was determined that the cutability was better and the workability was better as the number of cuts was smaller. For the vibration damping and sound insulating sheet of the example, a cut was made on the side of the gypsum board base paper, and a new blade was used by breaking the blade of the NT cutter for each break.

[0062]

[Table 1]

Example 5 A composition obtained by stirring and mixing 100 parts by weight of the above aqueous slurry and 1 part by weight of a water-crosslinkable urethane prepolymer was applied on a protective layer 1 (200 g / m ² gypsum board base paper). After forming a 10 mm thick vibration damping sound insulation layer (95% by weight of iron sand, 5% by weight of a binder component),
Further, the protective layer 2 (200 g / m ²
Except that the gypsum board base paper was laminated in the same manner as in Example 1 (10 mm thick × 610 mm ×
610 mm, 9 kg). In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

Example 6 The same composition as in Example 1 was used.
A protective layer (20) having both ends bent to have a U-shaped cross section
0 g / m ² of gypsum board base paper) to form a vibration-damping and sound-insulating layer, and a protective layer (20
0 g / m ² of gypsum board base paper)
A vibration damping and sound insulating sheet was obtained in the same manner as in Example 1. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

Example 7 A vibration-damping and sound-insulating sheet was obtained in the same manner as in Example 1, except that a spunbond polyester nonwoven fabric (basis weight 70 g / m ² )) was used as the protective layer 2. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

(Embodiment 8) As the protective layer 2, 1.5 mm
A vibration-damping and sound-insulating sheet was obtained in the same manner as in Example 1, except that a thick flexible polyurethane foam (manufactured by Bridgestone Chemical Co., Ltd., open cells, 30-fold foaming) was used. In the obtained vibration damping and sound insulating sheet, moisture was removed by evaporation in the drying step, and the sheet was integrated without delamination between layers.

(Comparative Example 3) A 10 mm thick asphalt-based vibration-damping sheet [Super Shizu, sold by Sumisho Metal Co., Ltd., surface density 5 kg / m ² , spunbond polyester non-woven fabric on both sides (weight per unit area: 70 g / m ² )] used.

Comparative Example 4 A 15 mm thick gypsum board (area density 15 kg / m ² ) was used.

The vibration-damping and sound-insulating sheets obtained in Examples 5 to 8 and Comparative Examples 3 and 4 were subjected to the following performance evaluations (3) and (4), and the results are shown in Table 1. (3) Acoustic evaluation A vibration-damping and sound-insulating sheet was installed on the second floor of a unit-type prefabricated house ("Sekisui Two You Home" manufactured by Sekisui Chemical Co., Ltd.).
The construction method is to lay a vibration-damping and sound-insulating sheet on a 20 mm-thick particle board (floor base material), layer a 6 mm-thick wooden flooring material on top of it, and dampen the sound-absorbing sound-insulating sheet and a wooden flooring material (floor finishing material). Was fixed using an adhesive (“Esdine Wood Flooring” manufactured by Sekisui Chemical Co., Ltd., vinyl acetate emulsion). In addition, a butt portion (tongue portion) of the wooden flooring material was formed by placing finish nails (length: 40 mm) at intervals of 150 mm to fix the floor finishing material and the floor base material. Using a tapping machine on the second floor, a light floor impact sound level difference was measured by a measurement method and a sound insulation class in accordance with JIS A1417. In addition, the vibration damping and sound insulating sheet using the soft polyurethane foam was constructed so that the soft polyurethane foam faced downward.

(4) Evaluation of Cutability The cutability was measured in the same manner as in Example 1. In addition, about the vibration damping sound insulation sheet of an Example, the cut was made in the base paper side for plasterboard.

[0071]

[Table 2]

[0072]

As described above, the vibration-damping and sound-insulating sheet of the first invention has a large vibration-damping and sound-insulating performance and can be easily cut by a cutter, so that the workability is excellent. Further, in the vibration damping and sound insulating sheet of the first invention, since the gypsum layer and the vibration damping and sound insulating layer are laminated at the same time as the formation of the vibration damping and sound insulating layer, an adhesive bonding step is not required at all.

The vibration-damping and sound-insulating sheet of the second invention is as described above, has great vibration-damping and sound-insulating performance, and is excellent in workability because it can be easily cut by a cutter.

Therefore, the vibration damping and sound insulating sheet of the present invention can be suitably used as a vibration damping and sound insulating material for a house floor.

[Brief description of the drawings]

FIG. 1 is a front view showing a method for evaluating cutability.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 1/86 E04B 1/86 T

Claims (4)

[Claims] 1. A vibration-damping and sound-insulating sheet in which a protective layer made of paper is laminated on at least one surface of the vibration-damping and sound-insulating layer, wherein the vibration-damping and sound-insulating layer contains a high specific gravity filler and an emulsion of non-vulcanized rubber. A vibration-damping and sound-insulating sheet comprising a water-based slurry and a composition comprising a water-crosslinkable urethane prepolymer. 2. A vibration-damping and sound-insulating sheet in which protective layers are laminated on both sides of a vibration-damping and sound-insulating layer, wherein at least one of the protective layers is made of paper, and the vibration-damping and sound-insulating layer is made of a material having a high specific gravity filler. A vibration-damping and sound-insulating sheet comprising a water-based slurry containing a vulcanized rubber emulsion and a composition comprising a water-crosslinkable urethane prepolymer. 3. A vibration-damping and sound-insulating material comprising a gypsum layer and a vibration-damping and sound-insulating layer laminated on at least one surface of the gypsum layer, wherein the vibration-damping and sound-insulating layer contains a high-specific-gravity filler and an emulsion of unvulcanized rubber. A vibration damping and sound insulating material characterized by being formed from a slurry and a composition comprising a water-crosslinkable urethane prepolymer. 4. A vibration damping and sound insulating material comprising the gypsum layer and the vibration damping and sound insulating sheet according to claim 1 laminated on at least one surface of the gypsum layer.