JP2000352146A - Building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve functions and workability by laminating a metal plate of a specified thickness and an ethylene-propylene copolymer rubber foam of a specified specific gravity. SOLUTION: An ethylene-propylene copolymer rubber foam plate 2 is crimped and laminated to a metal plate 1 through an acrylic ester adhesive material 3 to form a roof material, and when necessary, a reinforcing material made up of a nonwoven fabric or a synthetic resin film is crimped and laminated between the plates 1 and 2 through the adhesive material 3. Subsequently, the plate 1 is made up of a colored steel sheet, a colored plated steel sheet, plated steel sheet, an aluminum plate, or a colored aluminum plate and is 0.1 to 2.0 mm thick. The plate 2 has an apparent specific gravity of 0.03 to 0.07. Furthermore, the reinforcing material is preferably a strong flexible material selected from the group of a polyester, polyolefin, polycarbonate, nylon 6, 4 or the like and is 2 to 300 μm thick, whereby the structure can be simplified, the sound insulating property can be improved and workability can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to excellent soundproofing,
The present invention relates to a building material, such as a roofing material, which has a low impact sound due to a rain sound or the like and also has a heat insulating effect.

[0002]

2. Description of the Related Art In a construction material such as a roofing material having a soundproofing and heat insulating effect, as a base material, for example, an inorganic material such as a concrete slate plate, wood, a particle board, an iron plate, a colored zinc iron plate, a zinc iron plate, a colored steel plate, a copper plate, A metal plate such as a colored stainless steel plate, a stainless steel plate, a colored aluminum plate, an aluminum plate, a zinc plate, and a zinc alloy plate is used, or a metal plate laminated with a material having a soundproofing and heat insulating effect is used. For example, as a material having a soundproofing and heat insulating effect, a crosslinked polyolefin foam, a synthetic resin material such as a polyurethane foam or an inorganic material such as glass fiber laminated with an adhesive or heat fusion, or By roll forming them,
Waveform-imparted ones are used (Japanese Unexamined Patent Application Publication No. 9-8
8250 and JP-A-3-182342).

[0003] Such building materials are widely used as roofing materials for buildings because they are lightweight and easy to process during construction. However, since the base material is a metal plate, when rainfall occurs, raindrops are formed on the metal plate. The impact sound when falling on the floor is intense, and if materials that provide soundproofing and heat insulation effects are laminated, it is expected that the impact sound will be somewhat reduced, but the quietness of offices, factories, etc. Living environment, quiet work environment, etc. are more demanded these days, but it is natural as a roofing material for buildings, but it is unsuitable and suitable for quiet living environment, quiet work environment, etc. The appearance was expected.

In order to meet such expectations, a roofing material in which a material having a sound absorbing property and a heat insulating property such as glass fiber is laminated and integrated with a metal plate as a base material is known, and the sound absorbing performance of glass fiber is known. Is better than a polyolefin foam, for example, a closed-cell polyethylene foam, but glass fiber has a better sound absorption performance for the sound generated on the outer surface, for example, the rain sound, compared to the sound absorption performance for indoor generated sound. However, it is not always good, and there is a problem in using it as a soundproofing material for a roofing material.

[0005] On the other hand, in the case where the above-mentioned base material, which is a metal plate laminated with glass fibers, is processed into a corrugated form, for example, in the case of processing by roll forming, the glass fibers are crushed and scattered around. The glass fiber is formed into a uniform shape in a corrugated shape by laminating a glass plate on a metal plate with poor followability to the corrugation of the metal plate, that is, a desired shape retention property. It is difficult. Further, as shown in FIG. 6, when a metal plate (1) laminated with a synthetic resin foam (6), for example, a crosslinked polyethylene foam, is processed into a corrugated shape by roll forming, the bent portion (7) is formed by bending. ) The synthetic resin foam (6) located in the vicinity is compressed, crushed, thinned, becomes a permanent set, decreases linearly, and shows the appearance of the bent portion (7) of the synthetic resin foam (6). This has the disadvantage of impairing the effects of heat insulation, soundproofing and dew condensation. In particular, the general specification of a roofing material for a detached house is that the pitch of the corrugated irregularities is short, so that the synthetic resin foam (6) is subjected to corrugation while being stretched by the corrugation processing by roll forming. Since the mold processing is completed, the occurrence of breakage with the passage of time is inevitable, and as in the preceding paragraph, there is a drawback that the effects such as heat insulation, soundproofing, and dew condensation are hindered. In addition, a roofing material in which glass fibers are sandwiched between two metal sheets to form a three-layer laminate has been proposed (Japanese Patent Application Laid-Open No. 3-182342).
Although an improvement in the soundproofing effect against external rain noise is recognized, there is a disadvantage that indoor noise is reflected by a metal sheet on the indoor side to cause indoor divergence.

Further, as a substrate, a roofing material of a laminated metal sheet in which a thermoplastic resin film (viscoelastic material) having self-adhesive property is sandwiched between two metal sheets has been proposed (Japanese Patent Publication No. Hei 2 (1994)).
A roofing material obtained by laminating a foam or the like on this laminated metal sheet has an excellent soundproofing effect against rain noise.

However, the roofing material using the laminated metal plate as a substrate has a serious problem in manufacturing. That is,
Usually, a method of laminating a foam or the like on a substrate made of a laminated metal plate includes a method of applying an adhesive to one side of the foam or the laminated metal plate and laminating the foam or the laminated metal plate, and heating one of the foam or the metal plate. There is a method of laminating by heat fusion. However, when a laminated metal plate proposed in Japanese Patent Publication No. 55555/1990 is used as the base material, the base material has a structure in which a thermoplastic resin film (viscoelastic material) is interposed therebetween. Since the resin film functions as a heat insulating material, it hinders the averaging of heating, and the latter method of heat fusion cannot be adopted. Is bad.

Further, when a foam is laminated on the laminated metal plate as a substrate and then subjected to corrugation processing by conventional roll forming, a "displacement" occurs in the bonding surfaces of the laminated metal plates as a substrate, and This is a factor that lowers the sound absorption of the plate, and from the "deviation", rainwater enters and promotes corrosion of the laminated metal plate.
Requires waterproofing of parts. On the other hand, as one of the inevitable steps during roof construction, one roof unit is completed by engaging a plurality of roof materials in the longitudinal direction with each other, is important. That is, it is absolutely necessary to avoid rain leaks from the engagement points. However,
As shown in FIG. 7, a cross section of a conventional roofing material is formed by bending one end face to form a flange (8), and bending another opposite end face in a direction opposite to the one end face to form a flange (8). In many cases, a plurality of roofing materials are engaged with each other by engaging a flange (8) having a different bending direction with a scooping structure. Although the synthetic resin foam (6) is laminated on the metal plate (1) as the substrate, the synthetic resin foam (6) is not disposed near the flange (8). This will be described with reference to FIG. 6.
Is compressed, crushed, thinned, becomes permanent set, decreases linearly, and impairs the appearance of the bent portion (7) of the synthetic resin foam (6). However, dare to avoid disposing the synthetic resin foam (6). For this reason, the flanges with different bending directions (8)
In the case of engaging with a ladle structure, since the engaging portion is packingless, the water stoppage is almost nonexistent, so that infiltration of rainwater or the like cannot be completely prevented, causing corrosion. As described above, conventional building materials, particularly roofing materials, have many problems.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves the problems of conventional building materials, especially roofing materials, and provides excellent soundproofing and heat insulating effects by a simple laminated structure, and also has excellent processing characteristics such as bending. It is another object of the present invention to provide a building material, particularly a roofing material, which has not only a water stopping function at an interengaging portion but also a conventional roll forming apparatus which can be used as it is.

[0010]

The object of the present invention is to provide (1) "a building material comprising a metal plate and a rubber foam of ethylene propylene copolymer laminated" and (2) "a metal plate and a synthetic material. A building material in which a reinforcing material made of a resin film or a nonwoven fabric and a rubber foam of an ethylene propylene copolymer are laminated in this order ”, (3)“ the specific gravity of the ethylene propylene copolymer is 0.03 to The building material according to claim 1 or 2, wherein the building material is 0.07 (g / cm ³ ).
(4) “The building material according to claim 2 or 3, wherein the metal plate and the reinforcing material are laminated via an adhesive layer”, (5)
"The building material according to any one of claims 2 to 4, wherein the reinforcing material and the foam are laminated via an adhesive layer",
(6) “The building material according to claim 5, wherein the pressure-sensitive adhesive layer contains an acrylic acid ester-based pressure-sensitive adhesive as a main component”, (7) “The metal plate has a thickness of 0.1 to 0.1 mm. 2.0
mm, a colored steel plate, a colored plated steel plate, a plated steel plate, an aluminum plate or a colored aluminum plate, wherein the building material according to any one of claims 1 to 6 is used. Polyester, polyolefin, polycarbonate having a thickness of 2 μm to 300 μm, 6,4
The building material according to any one of (1) to (7) above, which is a flexible material selected from the group consisting of nylon.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
As a base material of the building material according to the present invention, a metal plate such as an iron plate,
Colored galvanized sheet, galvanized sheet, colored steel sheet, copper sheet, colored stainless steel sheet, stainless steel sheet, colored aluminum sheet, aluminum sheet,
Zinc plates, zinc alloy plates, etc. can be used, and as inorganic materials, for example, concrete slate plates, wood, particle boards, and the like, or composite materials composed of such metal plates and inorganic materials, wood, particle boards, etc. Depending on the roof material, it is preferable to use the above-mentioned metal plate, and a colored steel plate, a colored plated steel plate, a plated steel plate, an aluminum plate, or a colored aluminum plate is particularly preferable. And the thickness is 0.1
It is preferably from 2.0 mm to 2.0 mm in terms of ease of molding, convenience in handling such as transportation, strength and durability, and economic efficiency.

According to the rubber foam of the present invention, in consideration of the required degree of soundproofing, heat insulation and waterproofness depending on the application, in the case of a building material such as a roofing material, the impact noise when raindrops fall on a metal plate is reduced. Ethylene-propylene copolymer rubber (EPDM) foam with excellent soundproofing, heat-insulating properties, moisture resistance and heat resistance, taking into account the workability of building materials consisting of laminates of metal plates and rubber foam, etc. Most preferably, the body is used. The ethylene propylene copolymer rubber used in the present invention preferably has a Mooney viscosity (125 ° C.) of 50 or less and an iodine value of 25 or less in order to obtain sufficient foamability.

The foam of ethylene propylene copolymer rubber used in the present invention is a foam obtained by kneading butadiene rubber, isoprene rubber or chloroprene rubber as a rubber material with the ethylene propylene copolymer, and subjecting the mixture to foaming. The kneading ratio of the rubber material to the propylene copolymer is preferably 1: 0.2 to 10 parts by weight. Such a rubber foam is firmly adhered to a metal plate as a substrate, and its plasticity and flexibility reduce vibration energy as a cause of a collision sound when raindrops or the like fall on a rigid elastic metal plate. It absorbs well and rapidly disperses and transmits the energy of the absorbed part to the surrounding foam skeleton, thereby mitigating the collision sound. If the kneading ratio of the rubber material is less than 0.2 part by weight, excellent soundproofing, heat insulating effect, processing characteristics such as bending and the like cannot be obtained, and if kneading exceeds 10 parts by weight, undesired independent A cellular foam is obtained and the soundproofing is not satisfactory.

The ethylene-propylene copolymer rubber foam used in the present invention is, for example, a general-purpose ethylene-propylene copolymer rubber foam produced by the method described in JP-A-50-30960. can do. About hardness, 50% hardness is 0.002-0.5.
kg / cm ^2, in particular 0.04~0.05kg / cm ² is preferred (JIS K 6767). If it is too soft or too hard, workability may be impaired.

The kneaded material is then subjected to a foaming treatment, and the obtained foam is firmly fixed on a metal plate as a substrate. An adhesive is usually used for fixing. When laminating a metal plate and an ethylene propylene copolymer rubber foam plate, it is most preferable to laminate using an adhesive rather than an adhesive, such as terminal processing during roof construction, corrugation processing by roll forming, and the like. At this time, it is possible to manufacture a building material, especially a roofing material, which absorbs a "shift" of the laminate of the metal plate and the ethylene propylene copolymer rubber foam.

Examples of the pressure-sensitive adhesive include commercially available acrylates and isocyanates based on acrylates such as butyl acrylate, isobutyl acrylate, 2-methylheptyl acrylate and 2-ethylhexyl acrylate. Can be
In particular, an acrylate-based pressure-sensitive adhesive mainly containing an acrylate such as butyl acrylate is preferably used. An epoxy-based adhesive or the like can be added to these adhesives as long as the adhesiveness and the adhesiveness are not impaired. When only a hardening adhesive is used, it is bonded in a state of lack of flexibility, so it may resonate with a rigid elastic metal plate, and "deviation" when building materials are applied to a structure Is not only difficult to absorb, but also may not be able to withstand the bending process, resulting in a decrease in the function as a building material, which is not preferable.

Alternatively, the foam can be firmly fixed on a metal plate as a substrate by improving the adhesive performance of the foamed kneaded material itself without using an adhesive.
For that purpose, an isocyanate compound and an organic hydroxy compound are externally added to the kneaded product for foaming. The external addition amount is 1 part by weight or less, preferably 0.5 part by weight or less, more preferably 0.3 part by weight or less per 1 part by weight of the kneaded material for foaming.

The basic feature of the present invention is that a metal plate / ethylene propylene copolymer rubber foam plate is interposed via an adhesive, but a resin film, a metal film, a metal A more excellent building material can be obtained by reinforcing with a non-woven fabric, a synthetic non-woven fabric, a reticulated body or the like interposed therebetween. The resin film as a reinforcing material, a nonwoven fabric, a reticulated body, or the like is preferably a flexible material having excellent strength selected from the group consisting of polyester, polyolefin, polycarbonate, and 6,4 nylon. Preferably an aluminum film,
Their thickness is preferably between 2 μm and 300 μm.

By way of non-limiting example, such a reinforcing material can be firmly attached without using an adhesive, for example, by heat fusion to a metal plate. Preferably, it can be firmly fixed. As the pressure-sensitive adhesive in this case, the acrylate-based pressure-sensitive adhesive is preferably used. Further in the present invention,
Such a pressure-sensitive adhesive layer can be preferably used for firmly fixing the reinforcing material and the rubber foam.

As foaming agents for obtaining ethylene propylene copolymer rubber foams, DPT (N, N'-dinitrosopentamethylenetetramine), ADCA (Associacarbonamide), BS
H (Hensensulfonyl / Hydroxylate) or the like is used, and the amount of these foamed materials is preferably in the range of 5 to 25 parts by weight per 1 part by weight of the kneaded material. If the amount is less than 5 parts by weight, a sufficient expansion ratio cannot be obtained, and if the amount exceeds 25 parts by weight, the necessary strength of the building material may not be obtained. The foaming temperature is preferably in the range of 113C to 220C.

The apparent specific gravity of the thus-formed ethylene propylene copolymer rubber foam of the present invention is preferably from 0.02 to 0.2 g / cm ³ , more preferably from 0.030 to 0.2 g / cm ^3. It is preferably 0.070 g / cm ³ . If the apparent specific gravity is less than 0.02 g / cm ³ , breakage may occur during corrugation,
When the apparent specific gravity is larger than 0.2 g / cm ³ ,
The weight becomes heavy, and the strong fixation between the metal plate and the ethylene propylene copolymer rubber foam cannot be maintained, causing delamination, and also increasing the weight of the roofing material. It is not preferable in transporting the roofing material as a material. (The measurement of apparent specific gravity is based on the Japan Rubber Association Standards (S
RIS-0101) According to the method a of apparent specific gravity measurement method a) Tensile strength is 0.2 to 1.5 (kg / cm ² ), preferably 0.3 to 0.7 (kg / cm ² ). 100 to 400 (%), preferably 150 to 30
0 (%) 50% compression load is 3 to 50 (kg / 200φ), preferably 5 to
30 (kg / 200φ) Air permeability is 20 (cc / cm ² / sec) or less, preferably 10
(Cc / cm ² / sec) or less The cell diameter of 5 (mm) or less, preferably 3 (mm) or less satisfies the soundproofing and heat insulating effects and the price.
Also, regarding the thickness of the ethylene propylene copolymer rubber foam plate, if the thickness is too thin, there is a possibility that the soundproofing and heat insulating effect is reduced, and if it is too thick, there is a risk of impairing processability. 2 to 30 mm, preferably 3 to 1 mm
It is preferably 5 mm.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings based on embodiments, but the present invention is not limited to these embodiments and the like. FIG. 1A shows a first embodiment of the present invention.
FIG. 1 is a cross-sectional view showing a typical laminated structure of a roofing material.
FIG. 2B is a cross-sectional view illustrating a mutual longitudinal engagement structure of the roofing material according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating another stacking structure of the roofing material according to the second embodiment of the present invention. FIG. 3 is a cross-sectional view showing still another laminated structure of a roofing material according to a third embodiment of the present invention, FIG. 4 is a cross-sectional view showing a conventional laminated structure, and FIG.
FIG. 6 is a cross-sectional view showing a form in which the roof material of Example 1 shown in FIG. 1A of the present invention is formed into a corrugated shape by roll forming. FIG. 6 is a cross-sectional view of the conventional example shown in FIG. FIG. 7 is a cross-sectional view showing a conventional roof material having a flanged end face and an aspect of its longitudinal engagement, and FIG. 8 is a solid sound evaluation device using an electromagnetic excitation method. ) Is a metal plate, (2) is an ethylene propylene copolymer rubber foam, (3) is an adhesive, (4) is a nonwoven fabric, (5) a synthetic resin film, (6) a synthetic resin foam,
(7) shows a bent portion, (8) shows a flange, and (9) shows a water blocking structure.

The metal plate (1) used in each of the examples was an iron plate having a thickness of 1.6 mm. The metal plate (1) was used for evaluating the sound insulation performance (see Table 1). 1) This is adopted as a comparative example as a single unit.

Example 1 In Example 1, as shown in FIG. 1 (a), a 5-mm-thick ethylene propylene copolymer rubber foam plate (2) was formed from butyl acrylate on the metal plate (1). This is a roofing material obtained by applying an acrylic ester-based pressure-sensitive adhesive (3) containing an acrylic ester as a main component by roll coating and laminating by pressure. That is, when the laminated structure is schematically shown, it is a metal plate / adhesive / ethylene propylene copolymer rubber foam plate. Then, as shown in FIG. 1 (b), the longitudinal engagement structure of the roofing material of the first embodiment is such that the ethylene propylene copolymer rubber foam plates (2) are mutually pushed at the engagement portions. It is crushed and comes into contact, and a water stop structure (9) appears to prevent permeation of rainwater and the like. In addition, the roofing material obtained in Example 1 was roll-formed (waveform dimensions were 200 mm pitch between peaks, and 90 mm height).
Fig. 5 shows a corrugated roofing material processed into a corrugated
Shown in As clearly seen in FIG. 5, the bend (7)
No significant deformation such as crushing of the ethylene propylene copolymer rubber foam plate (2) was observed.

Example 2 In Example 2, as shown in FIG. 2, a reinforcing material was provided between the metal plate (1) and a 5 mm-thick ethylene propylene copolymer rubber foam plate (2). A non-woven fabric (4) mainly composed of polyester fiber is interposed, and an acrylate-based pressure-sensitive adhesive (3) mainly composed of acrylate composed of butyl acrylate is applied by roll coating and laminated by pressure bonding. In this case, since the pressure-sensitive adhesive (3) is applied to both surfaces of the nonwoven fabric (4), the laminated structure is schematically shown as a metal plate / pressure-sensitive adhesive / nonwoven fabric / pressure-sensitive adhesive / ethylene propylene copolymer rubber foam plate. Will be.

Example 3 In Example 3, as shown in FIG. 3, a reinforcing material was provided between the metal plate (1) and a 5 mm-thick ethylene propylene copolymer rubber foam plate (2). An acrylic ester-based pressure-sensitive adhesive (3) mainly composed of an acrylate of butyl acrylate is applied by roll coating and pressure-bonded and laminated with a polyester film as a synthetic resin film (5) interposed therebetween.
In this case, since the pressure-sensitive adhesive (3) is applied to both sides of the synthetic resin film (5), the laminated structure is schematically shown as follows: metal plate / pressure-sensitive adhesive / synthetic resin film / pressure-sensitive adhesive / ethylene propylene copolymer rubber It is a foam board.

[Conventional example] In the conventional example, as shown in FIG.
A crosslinked polyethylene foam plate (specific gravity 0.02), which is a synthetic resin foam plate (6) having a thickness of 5 mm, is formed on the metal plate (1).
6 g / cm ³ ) of an acrylate-based pressure-sensitive adhesive (3) containing acrylate of butyl acrylate as a main component is applied by roll coating and laminated by pressure bonding. That is, when the laminated structure is modeled, it is metal plate / adhesive / synthetic resin foam plate.

In each of the above embodiments and the conventional example, the amount of the adhesive and the thickness of the adhesive may be such that the laminated materials are not separated from each other, and the dimensions thereof are determined by the electromagnetic vibration method described below. The size was set to 500 mm × 600 mm in consideration of the size of the test body evaluated by the solid sound evaluation device.

Next, a method of evaluating the sound insulation performance will be described.
This evaluation method is an electromagnetic excitation method for evaluating the sound insulation performance of an insulator structure against panel excitation sound. As shown in FIG. 8, a reference iron plate (base panel) is fixed to a box whose inside has been subjected to sound absorption processing. A reference iron plate (base panel) is vibrated by an electromagnet that is not in contact with the iron plate installed at a fixed distance below the iron plate, and the reference iron plate (base panel) is vibrated.
Is pronounced. DUT is a standard iron plate (base panel)
It is placed on the upper surface, and its end is sealed with clay or the like. Then, the sound pressure level of the test object is measured, and the sound pressure level in the case of only the reference iron plate (base panel) is set to 0 dB, and the difference from the sound pressure level of the test object is evaluated for the sound insulation performance.

Table 1 shows the results of evaluation of the present invention by the above-described method for evaluating sound insulation performance. In the evaluation, the rain sound was 100
Because of the center frequency of 0 Hz, the frequency range is 400 Hz,
The evaluation was made at 630 Hz and 1250 Hz.

[0031]

[Table 1]

The ethylene propylene copolymer rubber foam used in the present invention is not particularly limited in its blending and production method, and generally commercially available ones are used. As for the rubber, EP-80 of JSR Co., Ltd., 3045H of Mitsui Chemicals, Inc., and Esplene 505A of Sumitomo Chemical Co., Ltd. are preferably used.

The ethylene propylene used in each of the Examples
The blending of polymer rubber foam is already known
Table 2 shows two examples of compounding (A) and compounding (B).
However, in the examples of the present invention, the compound (A) was used.
Ming is by no means limited to this formulation. Combination
(A) is kneaded and aged by a known method, and has a specific gravity of 1.16 g.
/ Cm^ThreeOf dough (Mooney viscosity 46 (125
C)), heat at 150 ° C for 30 minutes, which is also a known method.
In the wind, foam and crosslink, ethylene propylene copolymer
A rubber foam was produced. This ethylene propylene copolymer
Specific gravity of the body rubber foam is 0.05 g / cm ^Three, Pull
The strength is 0.5kg / cm^Two, Elongation is 200%, 50% pressure
The compression load is 6 (kg / 200φ), and the air permeability is 0.1 (cc / c
m^Two/ Sec), cell diameter is 2 (mm), heat insulation performance is 0.0
It was 3 kcal / mh ° C (T = 245 ° C). Also,
Remarkable compression permanence for thicknesses associated with roll forming
No distortion was observed.

[0034]

[Table 2]

[0035]

As is apparent from the above description, the present invention provides an excellent soundproofing effect and excellent processing by a simple structure of laminating a rubber foam, particularly an ethylene propylene copolymer rubber foam plate on a metal plate. It is possible to provide a building material, especially a roofing material, which exhibits properties.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view showing a typical structure of a roofing material of the present invention. (B) is sectional drawing which shows the mutual longitudinal direction engagement structure of the roofing material of Example 1 of this invention.

FIG. 2 is a sectional view showing another structure of the roofing material of the present invention.

FIG. 3 is a sectional view showing still another structure of the roofing material of the present invention.

FIG. 4 is a cross-sectional view showing a structure of a conventional roofing material.

5 is a cross-sectional view showing a form in which a roof material corresponding to FIG. 1A of the present invention is processed into a corrugated shape by roll forming.

FIG. 6 is a cross-sectional view showing a form in which a structure of a conventional roofing material is processed into a corrugated shape by roll forming.

FIG. 7 is a cross-sectional view of a longitudinal engagement of a conventional end flanged roofing material.

FIG. 8 is a schematic diagram of a solid-state sound evaluation device using an electromagnetic excitation method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal plate 2 Ethylene propylene copolymer rubber foam 3 Adhesive material 4 Nonwoven fabric 5 Synthetic resin film 6 Synthetic resin foam 7 Bending part 8 Flange 9 Waterproof structure

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) E04C 2/08 E04C 2/08 E E04D 3/35 E04D 3/35 G F-term (Reference) 2E001 DD01 DF01 FA16 GA23 GA42 GA82 HA04 HB01 HB02 HB03 HB04 HB07 HC01 HC04 HD11 HD14 HE01 LA04 2E108 CC01 CC02 CC03 CC05 CC07 CC11 GG04 2E162 CA11 CB01 CB02 CB07 CB08 CC01 CC05 CD04 CE01 4F100 AB01A AB10A AK01C AK03C01 AK25BAKB BAK AK25BAKA GB07 HB00A JA15B JH01 JK17C JL01 JL10A YY00A YY00B YY00C

Claims (8)

[Claims] 1. A building material comprising a metal plate and a rubber foam of ethylene propylene copolymer laminated. 2. A building material comprising a metal plate, a reinforcing material made of a synthetic resin film or a nonwoven fabric, and a rubber foam of an ethylene propylene copolymer laminated in this order. 3. The building material according to claim 1, wherein the rubber foam of the ethylene propylene copolymer has a specific gravity of 0.03 to 0.07 (g / cm ³ ). 4. The building material according to claim 2, wherein the metal plate and the reinforcing material are laminated via an adhesive layer. 5. The building material according to claim 2, wherein the reinforcing material and the foam are laminated via an adhesive layer. 6. The adhesive layer according to claim 5, wherein the adhesive layer contains an acrylic ester-based adhesive as a main component.
Building materials described in. 7. The metal plate has a thickness of 0.1 to 2.0 mm.
7. A colored steel plate, a colored plated steel plate, a plated steel plate, an aluminum plate or a colored aluminum plate of claim 1.
Building materials according to any of the above. 8. The synthetic resin film or the nonwoven fabric is a flexible material selected from the group consisting of polyester, polyolefin, polycarbonate, and 6,4 nylon having a thickness of 2 μm to 300 μm.
A building material according to any one of claims 1 to 7.