JPS6218441Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Field of Application] The present invention relates to a light-weight sound absorbing material that is fireproof, heat insulating, and sound insulating. [Prior Art] Generally, glass wool, rock wool, polyurethane foam, etc. are said to be optimal as sound absorbing materials. However, fibrous materials are hygroscopic and water-absorbing, and have drawbacks such as large changes in sound absorption properties and corrosion of the base. In addition, in the case of soft polyurethane foam, it has excellent water absorption resistance, moisture absorption resistance, and corrosion resistance, but on the other hand, although it is lightweight,
It lacks shape retention, is flammable and generates a large amount of smoke, and cannot be used in areas subject to fire prevention regulations.In addition, it has poor sound absorption properties.
It was effective only in the frequency band of 250-2000Hz. Of course, this foam had no sound insulating properties even in terms of the mass law. [Purpose of the invention] In order to eliminate these drawbacks, the present invention has improved fire retardancy, heat insulation, corrosion resistance, chemical resistance, sound absorption,
To propose a lightweight and inexpensive sound absorbing material that has excellent sound insulation and wearability. [Structure of the invention] The following is a diagram showing the sound-absorbing material having heat-insulating and fire-retardant properties (hereinafter simply referred to as sound-absorbing material) according to the present invention.
will be explained in detail. FIG. 1 is a perspective view showing the above-mentioned sound-absorbing material, in which 1 is a heat-insulating fireproof layer (hereinafter simply referred to as a heat-insulating fireproof layer) made of polyisocyanurate foam or phenol foam, and at least one surface thereof is flexible at room temperature. An adhesive layer 2 with a certain thickness is integrally provided. That is,
The thickness H ₁ of the above heat insulation fire protection layer 1 is 10 to 100 mm, and the density is
30~80Kg/m ³ , cellar structure is closed cell or open cell. In addition, the adhesive layer 2 functions to exhibit sound absorption, sound insulation, adhesiveness, vibration proofing, and fireproofing properties, and has a thickness H ₂ of 1 to 5 mm.
It is the rank. Further, the adhesive layer 2 is made of butyl-based synthetic rubber 3 and metal powder 4, and the butyl-based synthetic rubber has a penetration of 60 to 70 (at 20°C), a melting temperature of 170 to 190°C, and a melting temperature of 170 to 190°C. Viscosity 3000~
10400cps (at 180℃), softening point 100-110
℃, tensile test (film physical properties) elongation rate of approximately 1550%, breaking strength 8.5Kg/cm ² Heat resistance, no sagging (apply caulking agent to a slate board at 76 to 80℃, and hold it vertically for 76 hours. However, it does not sag), and there is no UV deterioration, cracking, discoloration, or change in hardness, and it also has sufficient flowability (it flows only 2 to 3 mm and retains its shape). The weather resistance remains unchanged even after 72 hours, and the adhesive strength is 60 kg/mm ² at 20°C and a tensile speed of 50 mm/min. The metal powder 4 mainly improves sound insulation and compression resistance, such as lead powder,
It is made of artificial graphite and aluminum powder. The amount added to the butyl synthetic rubber 3 is 20 to 50% (parts by weight). Furthermore, the butyl-based synthetic rubber 3 has a certain degree of adhesiveness and flexibility, so that it can be applied closely to the base without any gaps during installation. Next, an example will be explained. Polyisocyanurate foam and phenol foam are prepared as the heat insulating fire protection layer 1, and the thickness is
H ₁ was 25 mm, density was 42, and 44 Kg/cm ² . Note that the above is a closed cell structure, a closed cell ratio of 10%, or an open cell structure. In addition, the adhesive layer 2 has a composition in which 30 parts by weight of butyl-based synthetic rubber 3 and 30 parts by weight of lead powder (0.1 mmφ) as metal powder 4 are added to 100 parts by weight of the butyl-based synthetic rubber 3. H ₂ =
5mm and 6mm were laminated and integrated on one surface of the heat insulating fire protection layer 1. Further, as a comparative example, a case of a single polyurethane foam was taken as an example. Therefore, JIS-
The results of measuring the sound absorption properties according to A-1405 are shown in Figure 2. In addition, in FIG. 2, the one-dot chain line indicates Example 1, the two-dot chain line indicates Example 2, and the dotted line indicates Comparative Example. Next, a semi-noncombustible material drilling test was conducted according to JIS-A-1321.

【table】

[Other Examples]

What has been described above is only one embodiment of the sound absorbing material according to the present invention, and the sound absorbing material may be formed as shown in FIGS. 4 a to 4 e, for example. In other words, figure a shows a sound absorbing material made of a metal plate (thickness 0.1 to 1 mm) 5 made of lead, iron, aluminum, etc. with a heat-insulating fire protection layer 1 attached, and figure b shows a sound-absorbing material made of a heat-insulating fire protection layer 1 made of glass fiber, rock wool, or carbon fiber. A sound absorbing material containing approximately 10 to 30 parts by weight of mineral fiber 6 such as c.
The figure shows a net-like material 7 in the heat insulating fire protection layer 1 in figure a.
Figure d shows a sound absorbing material laminated with gypsum board 8 on the back of adhesive layer 2, and Figure e shows soft polyurethane foam 9 - phenol foam 1 - radiation crosslinked polyethylene foam 10 - adhesive layer 2 in this order. This shows a sound absorbing material that is laminated and integrated. [Effects of the invention] As mentioned above, according to the sound absorbing material according to the present invention,
It has excellent sound absorption, sound insulation, heat insulation, vibration isolation, workability, flexibility, and adhesive properties, as well as a certain degree of sound insulation, and is also lightweight. Furthermore, it has a fire-retardant property that passes a semi-flammability test due to the heat-insulating fire-retardant layer made of polyisocyanurate foam or phenol foam.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a sound absorbing material having heat insulating and fire retardant properties according to the present invention, FIGS.
Figures a to e are explanatory diagrams showing other embodiments. 1... Insulating fireproof layer made of polyisocyanurate foam or phenol foam, 2...
...adhesive layer.

Claims (1)

[Scope of utility model registration request] A heat insulating and fire-retardant property characterized by an adhesive layer made of butyl-based synthetic rubber mixed with metal powder being integrally laminated on one surface of a heat-insulating fire-retardant layer made of polyisocyanurate foam or phenol foam. Sound absorbing material with.