JPH0228047Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a composite sheet that has soundproofing, sound-absorbing effects, shielding effects against radiation, electromagnetic waves, and magnetism, and is also excellent in fire resistance.

Recently, noise pollution has become a problem in various places. There are countless sources of noise, from factories to homes, and although factories in particular have come to be located far away from residential areas, there are also restrictions, and noise has not spread to residential areas. It is a major cause of noise pollution. Furthermore, it is no exaggeration to say that there are almost no items that do not generate noise, from various home appliances to commercial equipment, and the sounds of televisions, pianos, etc. in ordinary homes have become a problem as neighborhood noise. Much of the noise pollution in cities is due to the noise emitted by vehicles such as automobiles, which have rapidly increased in number, and noise pollution in residential areas near factories is due to the working sounds emitted from the factories.

In order to prevent noise pollution, attempts are being made to surround noise sources, and materials with high sound insulation and sound absorption effects are required, and generally lead plates, steel plates, plywood, and slate plates are used. etc. are used as the base material. These base materials are not used alone, but are usually used in the form of a laminate with a covering material such as foamed urethane, synthetic resin such as vinyl chloride, or synthetic rubber bonded thereto.

Generally, iron powder or lead powder is mixed into the synthetic resin, synthetic rubber, etc. to improve the soundproofing effect. However, since this material had to be laminated to the aforementioned lead plates, steel plates, plywood, and slate plates, the overall thickness of the plates became thicker, creating difficulties in construction and workability on site.

Against the background of the above-mentioned circumstances, the present invention not only has excellent soundproofing and sound absorption effects, but also can shield radiation, electromagnetic waves, and magnetism, and the overall thickness of the board is not very large, making it easy to construct on site. ,
It was created with the aim of providing a composite sheet with excellent workability, and its composition has a thickness of 10~
A base sheet is formed by forming a lead plating layer of 30μ or more on 50μ iron foil, and the base sheet is laminated on one or both sides of a base material made of paper, board, synthetic resin, synthetic rubber, or glass fiber. This is a characteristic feature.

Conventionally, in order to obtain soundproofing effects, lead plates have been tried to be laminated with a plate-shaped base material made of synthetic resin or synthetic rubber, but the lead plate itself has no rigidity and is soft, so it is difficult to laminate it. Even if we wanted to use a lead sheet with a thickness of 0.3 mm or less to reduce the overall board thickness, such a thin lead sheet could only be obtained with a width of 300 mm or less. Even if an attempt was made to apply it industrially, it would not be possible to match the width of the base material made of synthetic resin or synthetic rubber to be laminated, and therefore it would be impossible to achieve a satisfactory composite of the lead sheet and the base plate. It was hot.

In order to overcome the above-mentioned difficulties of the conventional technology, the inventor of this invention conducted extensive research and found that by applying lead plating to iron foil, a lead sheet of the desired thickness and width could be obtained.
They learned that it could be efficiently laminated with plate-shaped substrates made of synthetic resin, synthetic rubber, glass fiber, etc., and completed the present invention.

Next, embodiments of the present invention will be described with reference to the drawings.

Example 1 In FIG. 1, 1 is an iron foil, 2 is a lead plating layer formed by plating both surfaces of the iron foil, and the base sheet A is constituted by the above. 3 is a plate-shaped base material made of synthetic resin or synthetic rubber, on which the base sheet A is laminated on one of the lead plating layers 2 via an adhesive layer 4;
The above constitutes an example of the composite sheet of the present invention.

Example 2 As shown in FIG. 2, the composite sheet of Example 1 was laminated on another base material 3 on the other side of the lead plating layer 2 to constitute a composite sheet of another example of the present invention. Ru.

Example 3 FIG. 3 shows another example of a composite sheet of the present invention, in which a base sheet A is also laminated on the lower surface of the base material 3 of the composite sheet of Example 1 via an adhesive layer 4.

The composite sheet of the present invention configured as described above is
By using a base sheet with a lead plating layer formed on one or both sides of iron foil, this base sheet (lead sheets) can be stacked.

In fact, a base sheet with a total thickness of 100μ, made by forming a 40μ thick lead plating layer on both sides of 20μ thick iron foil, has a higher sound absorption effect than residential rock wool (50mm thick).

Therefore, when this base sheet was laminated to a plate-shaped base material made of vinyl chloride with a thickness of 1 mm to form a composite sheet, this composite sheet had a sound insulation effect similar to that of a 0.5 mm layer of lead plate. This composite sheet is 15mm
It has a better soundproofing effect than thick rubber-filled plywood, rubber slate, or 40mm thick steel door.

In addition, the base sheet in the composite sheet of the present invention is
Since it has a lead plating layer, the composite sheet of the present invention naturally has a radiation shielding effect, and since iron foil is used for the base sheet, it also has a shielding effect against electromagnetic waves and magnetism. Demonstrates excellent effectiveness.

Since the present invention is as described above, it has a wide range of applications and is highly practical as a composite sheet that has excellent soundproofing and sound absorption effects, as well as radiation, electromagnetic wave, and magnetic shielding effects, and is also fireproof. be.

[Brief explanation of the drawing]

1 to 3 are enlarged cross-sectional views of an embodiment of the present invention. A... Base sheet, 1... Iron foil, 2... Lead plating layer, 3... Base material, 4... Adhesive layer.

Claims (1)

[Scope of utility model registration request] A base sheet is formed by forming a lead plating layer of 30μ or more on iron foil with a thickness of 10 to 50μ, and the base sheet is laminated on one or both sides of a base material of paper, board, synthetic resin, synthetic rubber, or glass fiber. A composite sheet characterized by comprising: