JP3499352B2 - Sound insulation material for piping - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe sound insulation member for covering the periphery of a pipe in a building through which a gas or a liquid flows.

[0002]

2. Description of the Related Art Heretofore, as a sound insulating member of this type, there has been a plate-shaped or sheet-shaped member formed by mixing a high specific gravity filler such as iron powder into asphalt or vinyl chloride. In other words, the specific gravity of the sound insulation member is increased and the sound insulation member is attached to the inside of the wall, floor or the like to reduce the propagation of sound and vibration from the adjacent room or the upper floor.

[0003]

However, in the case of the above-mentioned conventional sound insulation member, since the flexibility or elasticity of the member itself is poor, the member shape may be formed flat according to the application position of the sound insulation member, or It is necessary to set the shape in advance such that it is formed to have a predetermined curvature. And once the shape is set, if it needs to be greatly deformed when it is attached,
There is a problem in that it is difficult to attach the sound insulation member and the workability is poor.

The object of the present invention is to solve the above-mentioned drawbacks of the prior art, to have sufficient flexibility and elasticity, and to improve workability,
An object of the present invention is to provide a sound insulation member for pipes having excellent workability.

[0005]

[Means for Solving the Problems]

(Structure 1) The characteristic structure of the present invention for achieving this object is, as described in claim 1, a weight ratio of 6
0-90 ethylene propylene diene rubber, 40
The point is that a pipe sound-insulating member is formed by mixing metal powder with a base material blended with 10 to 10 chlorinated butyl rubber. (Operation / Effect) The sound insulation member for piping of this configuration is a material having a high specific gravity, but also has flexibility and elasticity. Therefore, when wound around the pipe, it is easy to attach the sound insulating member to a predetermined place while largely deforming it, and it is expected that the elasticity of the sound insulating member will allow the sound insulating member to come into close contact with the pipe. The high specific gravity and, in particular, the excellent impact absorption of chlorinated butyl rubber also effectively prevent the sound and vibration generated from the piping inside the building from propagating to the living space. You can

(Structure 2) The sound insulation member for pipes of the present invention can be formed by mixing iron oxide as the metal powder as described in claim 2. (Operation / Effect) According to this configuration, the specific gravity of the pipe sound insulation member can be significantly increased while using an easily available and inexpensive material. Therefore, it is possible to supply a sound insulation member for piping having a good sound insulation effect at low cost.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The sound insulation member 1 for a pipe of the present invention (hereinafter, simply referred to as "sound insulation member 1") can be formed into a sheet shape, for example, as shown in FIG. One of these surfaces is used as the contact surface 2 with the in-building pipe P, and has a shape having a plurality of irregularities. The unevenness has a function of improving the contact property of the sound insulation member 1 with respect to the pipe P. That is, it is troublesome to bring the pipe P and the sound insulation member 1 into contact with each other in a uniform pressure state at all positions, and a strong contact portion and a weak contact portion are likely to occur. In such a case, if the irregularities are formed as described above, the tip of the convex portion 3 is largely compressed and deformed in a portion that strongly contacts, so that the pipe P and the sound insulating member 1 are also formed in other portions. The contact of will be reliable. If the pipe P and the sound insulation member 1 come into contact with each other over a wider area, the sound generated from the pipe P
Since the vibration can be absorbed by the entire sound insulation member 1, the sound insulation performance is improved. Then, as described above, if the contact between the pipe P and the sound insulation member 1 is ensured, it is unlikely that the two are displaced even after the mounting.
Good sound insulation can be maintained for a long time. The shape of the irregularities is not particularly limited, and as shown in FIG. 1, the stripe-shaped convex portions 3 having a rectangular cross section may be continuous, and although not shown, they have a triangular pyramid shape. Alternatively, the pyramidal protrusions may be dispersed and formed on the entire contact surface 2. The other surface is simply exposed surface 4
However, the surface shape is not particularly limited. Further, the overall shape is not limited to the above-mentioned sheet shape, and as shown in FIGS. 2 and 3, it can be formed into a cylindrical shape or a spiral shape. With such a shape, the sound insulation member 1 itself elastically urges the pipe P by the elasticity of rubber, and reliable mounting can be performed without separately using a fixing band or the like. Of course, since it is possible to elastically deform the sound insulation member 1 when it is attached to the pipe P, the good workability of the sound insulation member 1 can be effectively utilized.

The sound insulating member 1 is composed of ethylene / propylene / diene rubber (hereinafter referred to as “EPDM”) which enables highly-filled blending of metal powder and chlorinated butyl rubber (hereinafter referred to as “EPDM”) which imparts tackiness to the material to which the metal powder is added. The base material is a blend of "CIIR"). The blend ratio of these is 60 to 90 EP by weight.
Blending 40 to 10 CIIR with DM gives good results. In addition, when only the EPDM is used, the adhesiveness becomes insufficient, and roll kneading
The workability such as calendering and extrusion becomes poor.
On the other hand, when only the CIIR is used, it has an excessive tackiness, which also deteriorates the workability such as roll kneading, calendering, and extrusion.

Since the metal powder to be blended with the base material is intended to increase the specific gravity of the sound insulation member 1, basically any metal powder having a specific gravity larger than that of the base material can be used. It may be metal. However, iron oxide is optimal in the sense that the specific gravity of the sound insulation member 1 can be made as large as possible, and the metal powder is easily available and inexpensive.

(Example) An example of the sound insulating member 1 of the present invention will be shown below. In this example, various raw materials were blended at the weight ratios shown in Table 1 to form a sheet having a thickness of about 4 mm. As the iron oxide, triiron tetroxide (specific gravity 5.16) was used.

[0012]

[Table 1] EPDM ……………… 70 CIIR ……………… 30 Powdered iron oxide ………… 630 Sulfur …………………… 1 Vulcanization accelerator ……………… 1 Zinc oxide ……………… 2 Stearic acid ………… 1 Process oil ………… 5

As a result, the hardness Hs (JIS A) = 9
0, tensile strength = 25 kgf / cm ² , elongation = 60%, specific gravity = 3.0, physical properties, good flexibility and elasticity, and excellent workability and workability. I was able to get

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a sheet-like sound insulation member for piping according to the present invention.

FIG. 2 is a sound insulation member for a pipe of the present invention formed in a substantially cylindrical shape.

FIG. 3 is a sound insulation member for piping of the present invention formed in a spiral shape.

[Explanation of symbols]

1 Sound insulation material for piping P Building piping

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Claims (2)

(57) [Claims] 1. A sound insulation member for a pipe (1) covering a periphery of an in-building pipe (P) through which a gas or a liquid flows, the ethylene / propylene / diene rubber having a weight ratio of 60 to 90 and 40 to A sound insulation member for piping, in which a metal powder is blended with a base material blended with 10 chlorinated butyl rubbers. 2. The sound insulation member for a pipe according to claim 1, wherein the metal powder is iron oxide.