JPH09111911A - Fireproof lamination body provided with sound absorbing efficiency - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof lamination body excellent in sound absorbing efficiency for noises specially in a low frequency range. SOLUTION: A fireproof lamination body 1 is equipped with the basic material of a punched metal 2 and a noncombustible or flame retardant fiber sound absorbing material layer 3 laminated on both sides or one side of the basic material, and gas permeability of the sound absorbing material layer 3 is controlled at most 200cm<3> /cm<2> .second. It is desirable that the rear side air layer 4 efficient in the promotion of sound absorbing efficiency is provided to the rear of the lamination body 1 by mounting it to a frame structural body through angle machining of the punched metal 2 or the space.

Description

Detailed Description of the Invention

[0001]

The present invention relates to soundproofing of houses, buildings, etc.
The present invention relates to a laminate used as a fire wall.

[0002]

2. Description of the Related Art In a soundproof wall of a house or a building, soundproof performance is enhanced by filling the inside of the wall with a fiber material such as rock wool or glass wool. Further, in order to omit the work for filling the fibrous material, a laminated body in which the fibrous material is previously laminated on a metal plate, a plywood or the like may be used.

[0003]

When a noise absorbing material such as rock wool or glass wool is used to absorb noise, 2K is required.
Noise in the high frequency range above Hz can be absorbed by a relatively thin material, but it is necessary to thicken the sound absorbing material for absorbing sound in the low frequency range below 2 KHz. However, if the sound absorbing material is applied thickly, the economical efficiency and the workability of the work are deteriorated. The present invention has been devised to solve such a problem. By using a punching metal as a base material and combining this base material with a fiber material excellent in sound absorption and fire protection, It is an object of the present invention to provide a laminate that can efficiently absorb even noise of high frequency and has good fire protection.

[0004]

In order to achieve the object, the fireproof laminate of the present invention comprises a base material made of punching metal, and is made of a non-combustible or flame-retardant material laminated on both sides or one side of the base material. A fibrous sound absorbing material layer is provided, and the air permeability of the sound absorbing material layer is adjusted to 200 cm ³ / cm ² · sec or less. As the fibrous sound absorbing material, in order to impart fireproofness, non-combustible non-woven fabric or non-woven fabric such as inorganic fiber, metal fiber, carbon fiber, or woven fabric or non-woven fabric of organic fiber subjected to flame-retardant treatment is used. For example, there is a glass cloth in which long glass fibers obtained by winding molten glass with a high-speed winder are used as the inorganic fiber.
When this fibrous sound absorbing material is combined with a punching metal, the sound absorbing performance through the holes formed in the punching metal is combined with the fibrous sound absorbing performance to form a laminate having excellent sound absorbing properties. As the punching metal, a metal having a chevron shape is also used so that an air layer is formed on the back side when the punching metal is attached to a support such as a frame structure made of grooved steel or the like. Alternatively, a grooved steel or the like having a recess may be used as the frame structure to which the laminated body is attached, and a back air layer may be formed between the frame structure and the flat laminated body.

The fireproof laminate 1 according to the present invention has a structure in which a fibrous sound absorbing material layer 3 is laminated on one surface of a punching metal 2 as shown in FIG. 1, for example. For the fibrous sound absorbing material layer 3, for example, nonflammable glass cloth having excellent sound absorbing properties is used. The fibrous sound absorbing material layer 3 can be laminated on both surfaces of the punching metal 3 as shown in FIG.
The fibrous sound absorbing material layer 3 has a large number of continuous fine gaps inside. When the sound wave (vibration of air) enters the fine gap of the fibrous sound absorbing material layer 3, it is consumed due to the viscous resistance of the air and becomes heat to be attenuated. In order to ensure good sound absorption, the air permeability of the fibrous sound absorbing material layer 3 should be 200 cm ³ /
It is necessary to increase the viscous resistance of air by adjusting the pressure to cm ² · sec or less.

In the fireproof laminate 1 of the present invention, the fibrous sound absorbing material layer 3 is constrained at the portion of the punching metal 2 where the holes are not formed. The punching metal has a function as a structural material without impairing the sound absorbing performance of the fibrous sound absorbing material. Further, by providing the back air layer 4 as shown in FIG. 3, it is possible to efficiently absorb noise in the low frequency region of 2 KHz or less. The back air layer 4 is formed by subjecting the punching metal 2 on which the fibrous sound absorbing material layer 3 is laminated to a chevron process. Alternatively, the fibrous sound absorbing material layer 3 may be laminated on the punching metal 2 which is formed in a predetermined shape in advance. Alternatively, as shown in FIG. 4, by mounting the flat laminated body 1 on the frame structure 5 having a recess such as a channel steel,
A back air layer 4 is provided.

[0007]

[Example] A hole diameter of 8 m in a stainless steel plate having a thickness of 0.6 mm
A hole having a large number of holes and a pitch of 10 mm was used as punching metal. The sound absorbing material shown in Table 1 was attached to this punched metal using a hot melt adhesive. As the sound absorbing material, glass cloth and flame-retardant non-woven fabric having different air permeability were used. As the glass cloth, four kinds of twill weave glass cloths A and B and plain weave glass cloths C and D were used. As the flame-retardant non-woven fabric, four types of flame-retardant non-woven fabrics A to D obtained by subjecting polyester fibers to a flame-retardant treatment were used.

[0008]

For each laminate having the fibrous sound absorbing material layer bonded together, vertical incidence was performed under the condition that the back air layer was set to 100 mm using a B & K 4206 type 2 microphone measuring tube and a 2032 type FFT analyzer. The sound absorption performance was investigated by measuring the sound absorption coefficient. The survey results are also shown in Table 1. Also, using a Frazier type tester, JISL
The air permeability was measured by method A. Table 1 and Figure 5 showing the survey results
As can be seen from the above, the laminate according to the present invention exhibited a high sound absorption coefficient in a wide frequency range. The air permeability is generally inversely proportional to the sound absorption property, and the air permeability is 205 cm ³ / cm.
^In the comparative example in which the time was ² seconds, the sound absorbing effect was reduced. From this, it is understood that the air permeability of 200 cm ³ / cm ² · sec or less is required.

When a large rear air layer is taken, excellent sound absorbing performance was observed especially in the low frequency region as shown in FIG. FIG. 6 shows that the peak frequency of the sound absorption coefficient changes depending on the size of the back air layer. Therefore, it can be seen that when the size of the rear air layer is set using the relationship of FIG. 6, the noise of the desired frequency is efficiently absorbed. Further, as shown in FIG. 7, by setting the back air layer to 100 mm, even when a thin glass cloth is laminated, the peak value is equivalent to that of the conventional sound absorbing material in which glass wool is laminated with a thickness of 50 mm. The sound absorption coefficient of was obtained. This shows that by securing the back air layer, good sound absorbing performance can be obtained even when a thin sound absorbing material such as glass cloth is attached to the punching metal.

[0011]

As described above, the fireproof laminate of the present invention is a wall material excellent in sound absorbing performance and fireproof by laminating a fibrous sound absorbing material layer on one side or both sides of a punching metal. Used as floor material, ceiling material, etc. The sound absorption performance is further improved by subjecting the punched metal to a chevron process or the like, or by providing a back air layer when the punched metal is attached to a frame structure such as a grooved steel, and particularly sound absorption in a low frequency region becomes possible. Among them, by extending the thickness of the back air layer, it is used as a sound absorbing material or a sound absorbing structure that exhibits a high peak value in the frequency range where sound is to be absorbed.

[Brief description of the drawings]

FIG. 1 Fire-retardant laminate in which a fibrous sound absorbing material layer is attached to one side of punching metal

[Fig. 2] Fireproof laminate in which fibrous sound absorbing material layers are attached to both sides of punching metal

[Fig. 3] Fire-retardant laminate in which a fibrous sound absorbing material layer is pasted on a chevron-shaped punched metal

FIG. 4 Fire-retardant laminate attached to frame structure via back air layer

FIG. 5 is a graph showing changes in sound absorbing performance depending on the sound absorbing material.

FIG. 6 is a graph showing the influence of the back air layer on the sound absorption performance.

FIG. 7 is a graph comparing the sound absorbing performances of the laminate according to the present invention and a conventional sound absorbing material.

[Explanation of symbols]

1: Fireproof laminated body 2: Punching metal 3: Fibrous sound absorbing material layer 4: Rear air layer 5: Frame structure

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kenji Koshiishi 7-1 Takayashinmachi, Ichikawa-shi, Chiba Prefecture Nisshin Steel Co., Ltd.

Claims (2)

[Claims] 1. A base material made of punching metal, comprising a non-combustible or flame-retardant fibrous sound absorbing material layer laminated on both sides or one side of the base material, and the air permeability of the sound absorbing material layer is 200 c.
A fireproof laminate having sound absorbing properties, characterized by being adjusted to m ³ / cm ² · sec or less. 2. The fireproof laminate according to claim 1, wherein a punching metal is used which has a chevron shape so that an air layer is formed on the back side when it is attached to a support.