JPH08199703A - Flame-retardant building material for insulating heat and sound, having function of shielding electromagnetic wave - Google Patents

Abstract

PURPOSE: To prevent electromagnetic waves from leaking inside or outside, by a method wherein metallic foil, which has a specified thickness and of which the extended part has a specified size, is stuck on either surface of a flame-retaradant expanded polystyren base-board with a specified thickness, and an inorganic board with a specified thickness is stuck thereon. CONSTITUTION: Metallic foil 3 is stuck on either of the upper and lower surfaces a 10-100mm thick base-board 1 flame-retardant expanded polystyrene beads molding or of an extruded foam polystyrene molding. In this case, the metallic foil 3 is made at a thickness of 20 to 200μm, the metallic foil 3 is extended by 1 to 100mm at adjacent sides of the base board 1, and parts to be joined with adjacent members are formed. After that, an inorganic board 5 having a thickness of 9.5 to 25mm is stuck on the metallic foil 3. At this time, an adhesive 2 with which the metallic foil 3 is stuck on the base board 1 and with which the inorganic board 5 is stuck on the metallic foil 3, is made of urethane resin, silicone resin or epoxy resin. In the case where an enclosed space is formed of this building material, electromagnetic waves generated at the inside of the space is prevented from leaking outside. Furthermore, this building material is effective as a shield against the electromagnetic waves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a ceiling material, a floor material, a side wall material, a partition material, a wall covering material, etc. of a room such as a factory, an office, or a general house, and has an electromagnetic wave shielding function. The present invention relates to a heat insulating and sound insulating building material.

[0002]

2. Description of the Related Art In recent years, in addition to personal computers and word processors used in factory construction, offices, and rooms in general houses, various electronic devices such as digital mobile phones, home security systems, home automation systems have been developed. Introduction is
Electromagnetic interference caused by the generation of electromagnetic noise from these electronic devices often leads to malfunction of devices and mechanical equipment. This is because recent electronic devices often use digital technology, and digital signals generate electromagnetic waves that are interfering waves over a wide range of frequencies.

In order to block such influences, various work rooms having an electromagnetic wave shielding function have been developed so far.

In such an electromagnetic wave shielded room, the interior surface is finished with a conductive material, that is, a metal plate, a metal foil, a metal vapor deposition film or the like.

[0005]

However, according to such a conventional method, it is necessary to request a professional craftsman to apply the shielding material such as copper foil, which causes a cost increase. There is. Further, these electromagnetic wave shielding materials cannot be used alone, and a base material having mechanical strength is provided on the outdoor side thereof, and a finishing material having a protective role is provided on the indoor side thereof. For this reason, there is a problem that it takes a lot of time and effort to make adjustments with finishing works, etc., and the structural strength of these electromagnetic wave shielding materials is low, and careful handling is required, resulting in a reduction in work efficiency.

An object of the present invention is to provide a flame-retardant, heat-insulating and sound-insulating building material having an electromagnetic wave shielding function, which can solve the conventional problems.

[0007]

In order to achieve the above object, the inventors of the present invention have earnestly studied, and as a result, adhered a metal foil to either one of the upper and lower surfaces of the flame-retardant polystyrene foam substrate,
On the two adjacent sides of the substrate, the metal foil is extended by a predetermined dimension to form a joint with an adjacent member, and an inorganic board is stuck on the metal foil to solve the conventional problems. The invention was completed.

That is, according to the present invention, a metal foil is attached to either one of the upper and lower surfaces of a flame-retardant polystyrene foam substrate, and the metal foil is extended by a predetermined dimension on two adjacent sides of the substrate. The present invention relates to a flame-retardant heat-insulating and sound-insulating building material having an electromagnetic wave shielding function, in which a joint portion with an adjacent member is formed, and an inorganic board having the same outer dimensions as the flame-retardant expanded polystyrene substrate is laminated thereon.

Examples of the flame-retardant expanded polystyrene substrate in the present invention include, but are not limited to, bead foam molded products and extrusion foam molded products. The flame-retardant styrofoam substrate may be any one containing a flame-retardant commonly used for polystyrene resins, for example, a brominated compound such as hexabromocyclododecane or tetrabromobutane. The outer mold size of the flame-retardant Styrofoam substrate is 910 mm × 1620 mm, commonly known as 3 × 6 plate or 1,000 mm × 2,00
Either 0 mm, commonly known as meter plate, thickness is 11 mm, 25 m
Five types of m, 35 mm, 50 mm, and 100 mm are usually prepared, so that they can be preferably used, but they can be changed if necessary. In addition, this thickness is prepared in such a form as to meet the heat insulation standard corresponding to the first to sixth areas of the energy saving standard stipulated in Ministry of Construction Notification No. 451. In order to ensure heat insulation, it is preferable to adopt a thickness according to the heat insulation standard for each region.

Next, a metal foil is attached to either one of the upper and lower surfaces of the flame-retardant polystyrene foam substrate. As the metal foil used here, generally used aluminum foil, copper foil, etc. However, other metal foils may be used, or a plastic film or sheet on which these metals are vapor-deposited, or a plastic film or sheet on which a paint containing metal powder is applied may be used. As the thickness of the metal foil, a thickness of 20 to 200 μm is often used, but any thickness other than the thickness may be used as long as it has an electromagnetic wave shielding function. However, if it is less than 20 μm, the electromagnetic wave shielding function may be unsatisfactory. In the case of vapor-deposited plastic film or sheet, the thickness of the vapor-deposited layer is preferably 20 to 200 μm, and in the case of plastic film or sheet coated with metal powder-containing paint, the metal in the coating layer after coating and drying of the paint The powders are preferably in contact with each other, and the thickness of only the metal powder in the coating layer is preferably 20 to 200 μm. In the case of a plastic film or sheet coated with a metal powder-containing paint, the effect of the electromagnetic wave shielding function becomes unsatisfactory unless the metal powders are in contact with each other.

Further, the metal foil is extended by a predetermined dimension on the two adjacent sides of the flame-retardant expanded polystyrene substrate, in order to secure the conductivity at the joint portion with the adjacent member by the fin portion. By this, the entire wall surface maintains conductivity and the electromagnetic wave shielding function is secured. Normally, the size of the fin that is the extension is 1 to 100 m
m, preferably 5 to 50 mm is used.

Furthermore, an inorganic board having the same outer dimensions as the flame-retardant expanded polystyrene substrate is laminated on this. As the inorganic board in the present invention, a gypsum board product based on JIS A 6901 or the like is preferably used, but in addition to this, lightweight cement board and various inorganic boards can be used. This inorganic board is non-combustible or semi-combustible based on the Building Standards Law. The thickness of the inorganic board is preferably 9.5 to 25 mm.

As the adhesive for sticking the metal foil and the flame-retardant polystyrene foam substrate, and the metal foil and the inorganic board,
Those having no volatile component and having the property of not dissolving the polystyrene foam substrate are preferable, and examples thereof include adhesives such as urethane resin, silicone resin or epoxy resin.

The flame-retardant heat-insulating building material having the electromagnetic wave shielding function of the present invention having the above-described structure has excellent sound insulation by adopting this structure, in addition to the above-mentioned effects. Needless to say, if the construction material of the present invention is used and a hollow wall is applied, the sound insulation performance is significantly improved.

The flame-retardant, heat-insulating and sound-insulating building material having the electromagnetic wave shielding function of the present invention can be finished with mortar, lysine or the like on the outer surface, and can be finished with mortar, lysine or the like on the inner surface. It can be finished by attaching a decorative sheet, decorative paper, etc.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. As shown in Fig. 1, the room temperature curing 2-liquid type epoxy resin adhesive is applied on the flame-retardant styrofoam (JIS A9511 B type 1 class) substrate (1) with a thickness of 50 mm and a bulk density of 30 kg / m ^3. After applying with a roller to 10 g / m ² , the specific gravity is
A copper foil (3) having a thickness of 2.0 and a thickness of 25 μm was attached. At this time, the copper foil was formed by extending the copper foil by 25 mm on two adjacent sides of the substrate. Further, the coating amount of the epoxy resin adhesive on the copper foil is 10 g / m ²
After applying with a roller so as to be, a 12 mm thick non-combustible gypsum board (5) based on JIS A 6901 was stuck. The epoxy adhesive was cured by allowing it to stand overnight at room temperature, and the degree of adhesion of each was good. The obtained product has a thermal conductivity of 0.027 kcal / m.hr. ° C and has a good heat insulating property. The sound insulation and electromagnetic wave shielding performance were also good.

[0017]

The flame-retardant Styrofoam substrate of the present invention is
It is flame-retardant and has a heat insulation effect, and meets the heat insulation standard applicable to the first to sixth areas of the energy-saving housing specified by the Ministry of Construction. Also used in the present invention
Metal foils such as aluminum foil and copper foil with a thickness of 20 to 200 μm not only simply reflect the electromagnetic waves that hit this building material, but also attenuate the reflected waves by absorbing the electromagnetic waves. . Therefore, when the sealed space is formed by this building material, there is no risk of leaking electromagnetic waves generated inside the space to the outside of the space, and electromagnetic waves from the outside are also reflected by the above layer, which has a shielding effect. The inorganic board that is laminated on top of it not only retains the mechanical strength during construction, but also has the mechanical strength as a structure, and also has fireproof performance based on the Building Standards Act. There is.

[Brief description of drawings]

FIG. 1 is a perspective view of a flame-retardant, heat-insulating and sound-insulating building material of the present invention.

[Explanation of symbols]

 1 Flame Retardant Styrofoam Substrate 2 Adhesive 3 Metal Foil 4 Adhesive 5 Inorganic Board

Claims (8)

[Claims] 1. A metal foil is attached to either one of the upper and lower surfaces of a flame-retardant polystyrene foam substrate, and adjacent two of the substrates are bonded together.
On the side, the metal foil is extended by a predetermined size to form a joint with an adjacent member, and an electromagnetic wave shielding function is provided by laminating an inorganic board having the same external dimensions as the flame-retardant Styrofoam substrate on it. Flame-retardant sound insulation and building materials. 2. The flame-retardant heat-insulating and sound-insulating building material according to claim 1, wherein the flame-retardant polystyrene foam substrate is a flame-retardant expanded polystyrene bead molded product or an extruded expanded polystyrene board molded product. 3. The thickness of the flame-retardant expanded polystyrene substrate is 10 to
The flame-retardant heat-insulating and sound-insulating building material according to claim 1 or 2, which is 100 mm 2. 4. The flame-retardant heat insulating and sound insulating building material according to claim 1, wherein the metal foil is an aluminum foil or a copper foil. 5. The flame-retardant, heat-insulating and sound-insulating building material according to claim 1, wherein the metal foil has a thickness of 20 to 200 μm. 6. The flame-retardant, heat-insulating and sound-insulating building material according to claim 1, wherein the extension of the metal foil has a dimension of 1 to 100 mm. 7. The flame-retardant, heat-insulating and sound-insulating building material according to claim 1, wherein the inorganic board has a thickness of 9.5 to 25 mm. 8. The adhesive for bonding the metal foil and the flame-retardant polystyrene foam substrate, and the metal foil and the inorganic board to each other is a urethane resin, a silicone resin or an epoxy resin. Flame-retardant, heat-insulating and sound-insulating building materials described in.