JPS6280032A - Sound-insulating processing material and sound-insulating processing method of board material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Application Field The present invention relates to a soundproofing material and a soundproofing method for plate materials. The present invention relates to a soundproofing material using a nonwoven fabric or a fibrous material, and a soundproofing method in which the soundproofing material is attached to a rigid board.

13. Prior Art Conventionally, soundproofing has been required for walls, ceilings, partitions, etc. of buildings, factories, warehouses, etc. For example, these have been treated with gypsum boards, asbestos slate boards, or a predetermined air layer. The concrete structure installed provides soundproofing.

Problems to be solved by the C0 invention However, this type of soundproofing treatment has poor soundproofing effect per unit weight, is complicated to construct, requires a long construction period, and requires a large amount of expense. There were drawbacks.

SUMMARY OF THE INVENTION In view of this situation, it is an object of the present inventors to provide a soundproofing material and a soundproofing method that have a simple structure, can be completed in a short period of time, are inexpensive, and have excellent soundproofing properties.

Means for Solving the D0 Problem In order to solve the above-mentioned technical problem, the present inventors conducted intensive research and found that a damping sheet material formed into an arbitrary uneven shape, or an arbitrary uneven structure integrated with a non-woven fabric. This book was developed based on the knowledge that the soundproofing material, which is made by filling the recesses of a vibration-damping sheet with fibrous materials, is lightweight, strong, has sound insulating and sound absorbing properties, and is easy to assemble. The invention was completed.

E. Construction One embodiment of the present invention will be described. A raw material composition constituting a vibration damping sheet is kneaded, extruded from an extruder, then rolled and cut to form the original fabric of the vibration damping sheet (i). A bulky nonwoven fabric is placed on the obtained original fabric, and heated and pressed using a mold having a predetermined uneven shape to obtain an integrated product of a vibration damping sheet having an uneven shape and a bulky nonwoven fabric. Next, a fibrous material is filled into the recesses of the integrated structure of the vibration damping sheet and the bulky nonwoven fabric, which has an uneven shape, and is bonded to a rigid plate material.
The soundproofing material of the present invention can be obtained by joining the materials by, for example, the following methods.

The damping sheet material used in the present invention is made of a bituminous material, vulcanized rubber, or thermoplastic synthetic rubber as a main component, kneaded with a filler having a relatively large specific gravity, and then molded.

The bituminous material may be any asphalt, such as through asphalt, blown asphalt, mixtures thereof, or recycled asphalt, and the vulcanized rubber component may be, for example, nitrile rubber, polybutanoene, polyisoprene, styrene-butanoene rubber. , natural rubber, recycled rubber, etc.

Thermoplastic synthetic rubber may be referred to as a thermoplastic elastomer, and its properties are rubber elasticity in the temperature range from low to room temperature, fluidity and plasticity at high temperatures (100°C or higher), and moldability. It is a material that can be

For example, as a thermoplastic elastomer, a block copolymer of styrene-butanoene-styrene or styrene-isoprene-styrene, especially a glass transition point (Tg)
Examples include block copolymers of polystyrene (thermoplastic Itr, min), which is an amorphous polymer with a temperature above room temperature, and polybutanoene or polyisoprene (rubber component), which is an amorphous polymer with a glass transition point below room temperature.

It is preferable to use one with a molecular weight of about 10,000 to 300,000,
More preferably, it is a thermoplastic elastomer having a molecular weight of about 50,000 to 80,000. The component ratio (ball ratio) of polystyrene and polybutadiene or polyisoprene in the block copolymer is preferably from 5:95 to 50:50. Furthermore, usable thermoplastic synthetic rubbers include polyurethane-based thermoplastic elastomers obtained by polyaddition reaction of various polyethers or polyesters with aromatic diincyanates, and polyether-polyester brosokubo+)mer F4 & Examples include flexible elastomers, trans-1,4-polyisoprene, 1,2-polybutanoene thermoplastic polyolefins, butyl-glutoethylene, mixtures of EPDM and polyolefins, or reaction products. .

Filler components include clay, talc, calcium carbonate, asbestos, barium sulfate, magnesium carbonate, lead powder, lead compounds such as lead carbonate, or lead sulfate, iron powder or iron compounds, barium carbonate, diatomaceous earth, mica, Zinc compounds such as alumina sulfate, graphite, molybdenum disulfide, zinc powder, or zinc carbonate can be used. Needless to say, commonly used flame retardants, antioxidants, heat stabilizers, vulcanizing agents, crosslinking agents, vulcanization accelerators, activators, dispersants,
It is used by adding and mixing anti-oxidizing agents, reinforcing agents, softening agents, coloring agents, etc. The blending ratio of the main component material and filler component is
The ratio is preferably 1:0.5 to 1:2.5. If the filler content is less than 0.5, sufficient sound insulation cannot be expected;
If the filler content is too large (2.5 or more), breakage or cracking may occur during molding, which is undesirable. The method of mixing each material is not particularly limited, and the materials are kneaded using a Banbury mixer, rolls, or the like. The obtained mixture is formed, for example, into a rubber sheet before vulcanization using an extrusion molding machine or a calendar processing machine, and is molded into a desired shape using a heat-pressing molding machine and simultaneously vulcanized.

The temperature during molding is about 130-230℃, and the pressure is about 1-1
00 kg/c+a2, and the molding time is about 1 to 10 minutes.

A pressure-sensitive adhesive may be applied to the vibration-damping sheet obtained in this way, and the pressure-sensitive adhesive used in this case may be a conventionally well-known adhesive, such as a synthetic Pressure-sensitive adhesives made of rubber, gum, petroleum resin, solvent, etc. can be mentioned.

Any method may be used to apply these adhesives (spray, roll coater or 70:+9-''4 can be preferably used).

In the present invention, the bulky nonwoven fabric that is integrally molded with the vibration damping sheet material is subjected to heat and pressure molding after the integration or in advance, so that the shape retention after the heat and pressure molding is improved. Therefore, it is necessary to contain a thermosetting synthetic resin as a binder and to scatter it in an uncured state in the bulky nonwoven fabric. If this requirement is met, the discontinuous fiber material that is the main material of the bulky nonwoven fabric may be one or more selected from animal, vegetable, mineral, synthetic resin, etc., or may be combined. There is no problem in using a thermoplastic synthetic resin as an agent.

Generally, it is made of discontinuous fiber material 11 or 2a or more selected from fallen cotton, waste wool, synthetic resin a fiber waste, etc., and thermosetting synthetic resin such as phenol resin, and the state before molding is usually thick. Size 8-40a+a+, areal density 400-4000g
/a+2 sheet-like material.

If necessary, the bulky nonwoven fabric can be optionally subjected to nonflammability, flame retardant treatment, waterproof treatment, water repellent treatment, fluff prevention treatment, etc. Moreover, there is no problem even if these treatments are performed after heat molding. For example, sodium silicate aqueous solution, silicon-based,
Spraying of water repellents such as hexafluoride-based water repellents, organic IJ compounds, organic sulfur halogen compounds, inorganic antimony/amide compounds, 7) flame retardants such as sodium silicate, pasting of non-flammable T11 leaf-like non-woven fabrics, etc. can be given.

Treatment agents used for flame retardancy, waterproofing, and decorative purposes include flame retardant thin nonwoven fabrics, saran cloths, and 0.011
Adhesion of thin plastic film of 11/Ifl or less,
Generally, a phosphoric acid compound, a halogenated organic sulfur compound, a flameproofing agent such as sodium heptafluorosilicate, a silicone-based waterproofing agent, a fluorine-based waterproofing agent, etc. are sprayed alone or in combination.

When a space is formed between the molded vibration damping sheet of the present invention and the plate material, it is preferable to fill the space with a fiber ML material, such as bulky nonwoven fabric, needle felt, or glass wool mat. is preferably used. Such a fibrous material may be cut into a shape similar to the shape of the molded vibration damping sheet and adhered to the damping sheet or simply filled, or an appropriate number of circular or 77-shaped fibrous materials may be cut. However, it is preferable to fill the entire concave portion of the damping sheet, and when a plurality of circular or rectangular sheets are pasted and filled, the ends may overlap. Furthermore, overlap 2 pieces of any part, 3
It is also possible to use the damping sheet in a stacked manner, and in this case, the damping sheet may be shaped so that the distance between the part and the plate material is large.

Rigid plate materials used in the present invention include steel plates, slate plates,
It is a board that is commonly used as a board material such as a gypsum board or an aluminum board, and is not limited to a board.

The methods and means for bonding the above-described molded bodies to these plate materials may be arbitrary, and it is preferable to bond any flat part of the molded body to the plate materials by directly contacting them, but the four sides of the plate materials The effect of the present invention can be achieved by providing a spacer on the plate and pasting only that part, or by bending any side of the plate material to form a U-shape and pasting the flat part of the molded body in contact with the part. It is possible.

Moreover, there is no problem in applying the molded body not only to one side of the plate but also to both sides.

F. Effects Although the soundproofing material of the present invention is lightweight, it has excellent soundproofing properties and is easy to manufacture and construct.

Examples will be given below for more detailed explanation.

Naturally, the present invention is not limited to the following examples.

Example 1 To 100 parts by weight of a rubber component consisting of 70% by weight of recycled tire rubber and 30% by weight of styrene-butanoene rubber, 130 parts by weight of calcium carbonate, 20 parts by weight of asbestos, 6 parts by weight of process oil, 3 parts by weight of zinc white, sulfur 3ffi
parts by weight and 0.5 parts by weight of the vulcanization accelerator were mixed in a Banbury mixer and extruded from an extrusion mill, then calender rolled, rolled, and cut to a material with a thickness of 311IIn and a specific gravity of 1.5.
A raw fabric before molding was obtained.

(i) Using a mold heated to 160°C,
Pressing was carried out for 3 minutes at a pressure of 0 kg/c+n' to obtain an expanded molded article with irregularities.

Glass wool 50% by weight and synthetic tone 3 (oily fiber 50%
100 parts by weight of the fiber component consisting of 100 parts by weight of the fiber component '100% by weight is spread and mixed, 25 parts by weight of the phenol υ (fat component) is spread and mixed, and 7 leases are formed using a fleece forming machine, and then passed through a heating furnace at 180°C to a thickness of 25a+/m. A bulky nonwoven fabric having an areal density of 955 g/+112 was obtained.

The concave portions of the concavo-convex shaped molded article 2 were filled with a bulky nonwoven fabric to obtain a composite. When the resulting composite was then mounted on a rigid material, it was found to be a lightweight soundproofing material with excellent soundproofing properties.

Example 2 Fiber component 10 consisting of 40% by weight of recycled wool and 60% by weight of fallen cotton
0 ffi parts were opened and mixed, and 25 parts by weight of 7-technol resin powder with a melting point of 170°C and a reaction temperature of 200°C was sprinkled and mixed to form 7 leases in a 7 lease forming machine, and then passed through a heating furnace at 180℃. Thickness 30+o/rO1 areal density 1151) g/
A bulky nonwoven fabric of 112 was obtained.

The original fabric obtained in Example 1 (using a mold on which the bulky nonwoven fabric was placed and heated to 200°C) was 3 kF!/cI
Pressing was carried out for 5 minutes at a pressure of 112 mm to obtain a molded article having an uneven shape.

Next, the bulky non-woven fabric described in Example 1 was filled into the concave portions of the uneven molded body in the same manner as in Example 1 to obtain a composite.

When the resulting composite was mounted on a slate board, it was found to be lightweight and have excellent soundproofing properties.

Example 3 100 parts by weight of the main component consisting of 75% by weight of blown asphalt and 25% by weight of styrene-butadiene rubber was used to give a thickening of 40fflfi/! Inhibition process oil 9
Parts by weight and 1 part of 75,000 FIt of asbestos were kneaded with a mixing roll and extruded from the extrusion allowance, and then rolled and cut with a calendar roll to obtain an unmolded raw fabric with a thickness of 2111111 and a specific gravity of about 1.3.

Using a mold heated to 140°C, the obtained original fabric was molded into 8 kg.
Pressing was carried out for 2 minutes at a pressure of /c+a' to obtain an uneven shaped molded article.

Next, the I'' described in Example 1 was applied to the concave portion of the uneven molded body.
? A composite was obtained by filling according to L-height nonwoven fabric Example 1.

When one slate board was attached to the resulting composite, it was found to be lightweight and have excellent soundproofing properties.

Claims (1)

[Scope of Claims] 1. The invention is characterized by filling the recesses of a vibration damping sheet-like material having an arbitrary uneven shape or a vibration-damping sheet-like material having an arbitrary uneven shape integrated with a non-woven fabric with a fibrous material. A soundproofing material 2, in which a fibrous material is filled between a vibration-damping sheet-like material having an arbitrary uneven shape or a vibration-damping sheet-like material having an arbitrary uneven shape integrated with a nonwoven fabric and a rigid plate material. A soundproofing method characterized by