JPH0656225U - Sound insulation - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an excellent sound insulating material. [Structure] A synthetic resin layer 3 in which barium sulfate 3A having a large specific gravity is dispersed is formed on the surface of a plastic foam 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sound insulation material used for buildings and structures.

[0002]

[Prior art]

 Conventionally, plastic foams such as polystyrene foam, polyethylene foam and polypropylene foam have been used as this type of sound insulation material.

[0003]

[Problems to be solved by the device]

 However, the plastic foam only has a sound insulation effect due to the sound absorption effect of the air contained therein, and a sufficient sound insulation effect cannot be obtained.

[0004]

[Means for Solving the Problems]

 The present invention provides a sound insulating material (1) having a synthetic resin layer (3) in which barium sulfate (3A) is dispersed on the surface of a plastic foam (2) as a means for solving the above conventional problems. Is.

[0005]

[Action]

 The sound insulating material (1) of the present invention comprises a plastic foam (2) and a synthetic resin layer (3) in which barium sulfate (3A) is dispersed, and the plastic foam (2) contains the air contained therein. Therefore, the synthetic resin layer (3) has a sound damping effect due to the weight of the barium sulfate (3 A) dispersed therein.

[0006]

【Example】

 The present invention will be described with reference to an embodiment shown in FIGS. 1 and 2. (2) is a plate-like plastic foam, which is a polyethylene foam, a polypropylene foam, a polystyrene foam, or a polyethylene-polystyrene mixed foam. Body, polypropylene-polystyrene mixed foam, etc. are mainly made of plastic foam having independent foaming, and a large number of grooves (2A) are formed on the surface.

As shown in FIG. 2, a synthetic resin layer (3) in which barium sulfate (3A) is dispersed is formed on the surface of the plastic foam (2). The synthetic resin layer (3) is usually formed to have a thickness of about 100 to 500 g / m ² . The synthetic resin layer (3) is made of, for example, 100 parts by weight of synthetic resin or rubber such as vinyl acetate resin, ethylene-vinyl acetate resin, acrylic resin, epoxy resin, styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber. About 1000 parts by weight of barium sulfate (3A) is dispersed. A viscous substance such as asphalt or pitch may be further added to the synthetic resin layer (3).

In the sound insulating material (1), the plastic foam (2) has a sound absorbing function because it contains air inside, and the synthetic resin layer (3) has a specific gravity of about 4.5 barium sulfate (3). 3A) has a sound damping effect because of its weight. Further, the synthetic resin layer (3) digs into the groove (2A) on the surface of the plastic foam (2) and exhibits good adhesion due to the anchor effect.

As shown in FIG. 3, a plastic foam (2) of the same kind or different kind may be further attached to the sound insulation material (1) by using the synthetic resin layer (3) as an adhesive. The sound insulating material (1A) is, for example, driven into a wall, floor or slab of a concrete building, or attached to a wall or floor of a wooden or steel frame building to serve as a heat insulating material. It can also be used as a sound insulation bran by fitting a frame around it.

Still another embodiment is shown in FIGS. 4 and 5. In this embodiment, a large number of holes (2B) are provided on the surface of the plate-shaped plastic foam (2), and a synthetic resin layer (3) in which barium sulfate (3A) is dispersed is formed on the surface. The synthetic resin layer (3) digs into the hole (2B). Then, a plywood (4) is attached onto the synthetic resin layer (3) using the synthetic resin layer (3) as an adhesive. The sound insulation material (1B) is used, for example, as a concrete formwork, and the concrete formwork is used as a sound insulation material by being attached to the concrete structure to be molded without peeling off. Further, the sound insulation material (1B) may be attached to a wall surface of a wooden or steel frame building, and both surfaces of the sound insulation material (1B) may be coated with mortar to be used as a wall base material.

Except for the above-mentioned embodiments, in the present invention, it is not always necessary to form grooves or holes on the surface of the plastic foam.

[0012]

[Effect of device]

 Therefore, according to the present invention, an excellent sound insulating material having a sound absorbing function and a sound damping function can be obtained.

[Brief description of drawings]

 1 and 2 show an embodiment of the present invention.

Figure 1: Surface view of plastic foam

[Fig. 2] Cross section of sound insulation material

FIG. 3 is a sectional view of a sound insulation material of another embodiment. FIGS. 4 and 5 show still another embodiment.

[Figure 4] Surface view of plastic foam

[Figure 5] Cross section of sound insulation material

[Explanation of symbols]

 1,1A, 1B Sound insulation 2 Plastic foam 3 Synthetic resin layer 3A Barium sulfate

Claims (1)

[Scope of utility model registration request] 1. A sound insulation material, characterized in that a synthetic resin layer in which barium sulfate is dispersed is formed on the surface of a plastic foam.