JP2023058364A - Metal sandwich panel and building material - Google Patents

Abstract

To provide a metal sandwich panel and building material with excellent sound insulation performance.SOLUTION: In a metal sandwich panel 1 having a surface material 11 and a back surface material 12 made of metal material adhered to the front and back surfaces of a core material 10, a high-density face material 16 having a face density of 0.5 to 4 times the face density of the surface material 11 or back surface material 12 is adhered to the surface of the surface material 11 or back surface material 12.SELECTED DRAWING: Figure 1A

Description

The present invention relates to metal sandwich panels and building materials.

Conventionally, metal sandwich panels have been widely used in the construction field due to their lightness and workability. A metal sandwich panel consists of a front and back surface made of metal plates that are fixed to the front and back surfaces of a core material. Foamed plastic is often used for the core material, and the front and back surfaces and the foamed plastic are strongly bonded together. A predetermined strength as a metal sandwich panel is obtained by integrating the panels.

Further, rock wool has been proposed as a core material when fire resistance is required (see, for example, Patent Document 1). Fire resistance and strength were obtained by using high-density rock wool and firmly bonding the front and back materials on both sides to the high-density rock wool.

Japanese Patent No. 3657692

However, with the increasing use of metal sandwich panels for major partitions that require fire resistance, rather than for ceilings and minor partitions where metal sandwich panels have traditionally been used, the sound insulation is inferior. is becoming a problem. In particular, when metal sandwich panels are used for applications that require sound insulation, special considerations such as double walling are required, resulting in increased costs and difficulty in construction. It's here.

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal sandwich panel and a building material which are excellent in sound insulation performance, low in cost and easy to construct.

[1] In a metal sandwich panel in which a surface material and a back material made of a metal material are fixed to the front and back surfaces of a core material, on the surface of the surface material or the back material, the surface density of the surface material or the back material is 0 A metal sandwich panel, characterized in that a high-density face material having a surface density of 5 times or more and 4 times or less is fixed.

[2] A metal sandwich panel in which a surface material and a back material made of a metal material are fixed to the front and back surfaces of a core material,
The core material consists of a plurality of heat insulating layers and a high-rigidity layer sandwiched between the plurality of heat insulating layers,
A metal sandwich panel, wherein a ratio of the thickness of the heat insulating layer on the surface material side to the thickness of the heat insulating layer on the back material side is 1.8 or more and 4.0 or less.

[3] The metal according to [2] above, wherein a high-density surface material having an area density of 1.5 to 4.0 times the surface density of the surface material is adhered to the surface of the surface material. sandwich panel.

[4] The metal sandwich panel according to [2] or [3], wherein the heat insulating layer is a foamed resin layer, and the high-rigidity layer is an inorganic material layer.

[5] A plurality of metal sandwich panels according to any one of [1] to [4] are arranged adjacent to each other in the width direction, and between the adjacent metal sandwich panels, the high-density face material metal sandwich panels having interpanel joints that are not affixed.

[6] A building material comprising the metal sandwich panel according to [5] above, wherein a sealing material is placed in the joints between the panels.

ADVANTAGE OF THE INVENTION According to this invention, the metal sandwich panel and building material which were excellent in sound insulation performance can be provided.

1 is an overall view of a preferred example of a metal sandwich panel according to a first embodiment of the present invention; FIG. 1B is a vertical cross-sectional view of the metal sandwich panel shown in FIG. 1A; FIG. 1B is a horizontal sectional view of the metal sandwich panel shown in FIG. 1A; FIG. FIG. 5 is a vertical cross-sectional view of a preferred example of a metal sandwich panel according to a second embodiment of the present invention; FIG. 4 is a vertical cross-sectional view of another preferred example of a metal sandwich panel according to the second embodiment of the present invention; 1 is an overall view of a partition wall as an example of building material according to the present invention; FIG. Figure 3B is a vertical cross-sectional view of the partition wall shown in Figure 3A; 3B is a horizontal sectional view of the partition wall shown in FIG. 3A; FIG. 3D is an enlarged view of an example of the inter-panel joint portion of the partition wall shown in FIG. 3C. FIG. 3D is an enlarged view of another example of the inter-panel joint portion of the partition wall shown in FIG. 3C. FIG. It is the figure which showed an example of the fixing method to the building of a partition wall.

(metal sandwich panel)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The metal sandwich panel according to the first embodiment of the present invention is a metal sandwich panel in which a surface material and a back material made of a metal material are fixed to the front and back surfaces of a core material, and the surface material or the back material is attached to the surface of the surface material or the back material. A high-density surface material having a surface density of 0.5 to 4 times the surface density of the back surface material is fixed.

The inventor of the present invention has made intensive studies on how to provide a metal sandwich panel with excellent sound insulation performance. As a result, since the metal sandwich panel is originally lightweight, the transmission loss according to the law of mass is small and the sound insulation is poor. By firmly bonding the metal materials on both sides through the core material, the front and back materials on both sides resonate, creating extremely sharp coincidences that are unparalleled in other materials. It was found that the influence of the mounting method and joint structure of the metal sandwich panel is negligible. As a result, they came up with the idea of fixing the face material to the surface of the surface material or the back material that constitutes the metal sandwich panel. However, as a result of investigation by the present inventors, it was found that sufficient sound insulation cannot be obtained simply by adhering the face material to the surface of the surface material or the back material. Therefore, as a result of further studies by the present inventors, the sound source side can The inventors have found that the resonance between the surface material of the sound receiving side and the surface material of the sound receiving side can be suppressed easily and at low cost, and the sound insulation performance can be improved, and the present invention has been completed. Each configuration of the metal sandwich panel according to the present invention will be described below.

FIG. 1 shows a preferred example of a metal sandwich panel according to the invention. In the metal sandwich panel 1 shown in FIG. 1, a surface material 11 and a back material 12 made of metal material are fixed to front and back surfaces of a core material 10 . A high-density surface material 16 is fixed to the surface of the surface material 11 . In the metal sandwich panel 1 illustrated in FIG. 1 , the core material 10 is composed of heat insulating layers 13 and 14 and a high rigidity layer 15 .

－Surface material and back surface material－
The surface material 11 and the back material 12 are made of metal material. When the surface material 11 and the back material 12 are made of a metal material, the metal material may be formed into a predetermined cross-sectional shape by press molding, roll molding, or the like.

Examples of metal materials include hot-dip 55% aluminum-galvanized steel sheets, hot-dip galvanized steel sheets, and painted hot-dip 55% aluminum-galvanized steel sheets (coating: polyester resin, acrylic resin, silicone resin, amino-alkyd resin , vinyl chloride resin, fluorine resin, epoxy resin, urethane resin), painted hot-dip galvanized steel sheet (coating: polyester resin, acrylic resin, silicone resin, amino/alkyd resin, vinyl chloride resin, fluorine-based resin, epoxy-based resin, urethane-based resin), painted stainless steel plate (coating: polyester-based resin, acrylic-based resin, silicon-based resin, amino-alkyd-based resin, vinyl chloride-based resin, fluorine-based resin, epoxy-based resin, urethane resin), vinyl chloride resin film covering/metal plate, highly weather-resistant rolled steel (coating: epoxy resin, urethane resin), polyester resin coating on both sides/hot-dip aluminum plated steel plate, ferrite stainless steel plate, acrylic resin on both sides A system coating/zinc alloy plate or the like can be used. In addition, the coating of the metal plate is generally applied not only to the surface but also to the surface to be adhered to the organic insulation board. The resin is selected from the viewpoint of combustibility, and it is preferable to use a polyester resin, a urethane resin, an acrylic resin, or the like.

Further, surface densities of the surface material 11 and the back material 12 are preferably 2.7 kg/m ² or more and 7.9 kg/m ² or less. By setting the surface density of the surface material 11 and the back material 12 to 2.7 kg/m ² or more, the strength required for the metal sandwich panel 1 can be ensured. On the other hand, by setting the surface density of the surface material 11 and the back material 12 to 7.9 kg/m ² or less, the surface material can be easily shaped and cut, and the lightness of the metal sandwich panel 1 can be ensured.

The dimensions of the surface material 11 and the back material 12 can be appropriately set according to the design. For example, the length can be 0.6 to 12 m and the width can be 300 to 1000 mm. The thickness of the surface material 11 and the back material 12 can be 0.3 to 1.6 mm, more preferably 0.4 to 1.0 mm, in terms of strength, weight, and economy. be.

-core material-
The core material 10 forming the matrix of the metal sandwich panel 1 can be made of an appropriate material according to the properties required for the metal sandwich panel 1, such as fire resistance and heat insulation. For example, the core 10 can be configured with insulating layers 13,14. Thereby, the metal sandwich panel 1 having high heat insulation can be obtained. Also, the heat insulating layers 13 and 14 can be foamed resin layers made of foamed resin. This makes it possible to obtain the metal sandwich panel 1 that is lightweight and has high heat insulating properties. The foamed resin layer will be detailed later.

In addition to the foamed resin layer, the core material 10 can further have a high-rigidity layer 15 made of a material having high rigidity. Thereby, the metal sandwich panel 1 having high rigidity and high heat insulation can be obtained. The high-rigidity layer 15 can be an inorganic material layer made of an inorganic material. This makes it possible to obtain the metal sandwich panel 1 that is lightweight, has high heat insulation and high fire resistance. The inorganic material layer will be detailed later.

Furthermore, the core material 10 is composed of a plurality of (two in the example of FIGS. 1A to 1C) heat insulating layers 13 and 14 and a high rigidity layer 15 sandwiched between the plurality of heat insulating layers 13 and 14. be able to. With such a configuration, the thicknesses of the heat insulating layers 13 and 14 to which the surface material 11 and the back material 12 are respectively fixed, that is, the support conditions of the surface material 11 and the back material 12 are made different from each other, thereby improving the vibration characteristics. By making them different, the resonance between the surface material 11 and the back material 12 can be suppressed, and the sound insulation can be improved.

The method of fixing the surface material 11 and the back material 12 to the core material 10 is a method in which the surface material 11/back material 12 and the core material 10 are firmly fixed and integrated, and the strength of the metal sandwich panel 1 can be secured. There is no particular limitation, and an adhesive such as an organic adhesive or an inorganic adhesive, a double-sided tape, or the like can be used. Among them, organic adhesives are often used because they are low cost and excellent in working efficiency if dedicated equipment is provided.

Organic adhesives include urethane resin-based (main component: urethane resin, solvent: esters, ketones), epoxy resin-based (main component: (main agent) epoxy resin, (curing agent) modified polyamine, modified polythiol, solvent : esters, ketones, alcohols), vinyl acetate resin-based (main component: vinyl acetate resin, solvent: alcohols, esters, ketones), and modified silicon-based ones can be used. Among them, urethane resin-based adhesives are preferable because they are excellent in adhesiveness, can exhibit high adhesive strength in a wide temperature range, and can easily set curing characteristics during panel production.

-- Foamed resin layer --
Here, a case where the heat insulating layers 13 and 14 are made of foamed resin layers will be described. The foamed resin layers 13 and 14 are layers made of foamed resin, and can provide the metal sandwich panel 1 with lightness and heat insulation. Polyurethane resin, isocyanurate resin, phenol resin, polystyrene resin, polyethylene resin and the like are preferably used as the foamed resin because they are excellent in cost.

Moreover, it is preferable that the foamed resin is composed of a thermosetting resin from the viewpoint of fire resistance of the panel 1 . As a result, even after the surface material 11 (back material 12) and the foamed resin layer 13 (14) are separated when the surface material 11 (back material 12) is heated in a fire, etc., the foamed resin layer 13, 14 can be pinned to the surface of the rigid layer 15 .

--- Thermosetting resin ---
A polyurethane resin, an isocyanurate resin, a phenol resin, or the like can be used as the thermosetting resin. Among them, it is preferable to use a phenolic resin as the thermosetting resin because of its high flame retardancy, and it is more preferable to select a resin that expands when heated and carbonized.

The foamed resin layers 13 and 14 can be formed by mixing a thermosetting resin, a curing agent, a foaming agent, etc. together, foaming and curing, and forming the resulting resin foam into a board shape. The foamed resin layers 13 and 14 may have surface materials on the front and back surfaces in terms of molding convenience and adhesiveness with the surface material 11 (back material 12) and the high-rigidity layer 15. .

The foamed resin layers 13 and 14 having such a resin foam and face material are formed by mixing a thermosetting resin, a curing agent, a foaming agent, etc. on the face material and discharging the mixture onto the face material running at a constant speed. It can then be molded into a board between conveyors in a curing oven. Alternatively, the foamed resin layers 13 and 14 may be constructed by placing the surface material 11, the back material 12 and the high-rigidity layer 15 in advance with a predetermined gap, and then injecting an organic resin material into the gap. In this case, if the above organic resin material is properly selected, it can also be used as an adhesive due to its self-adhesive strength.

Polyester nonwoven fabric, polypropylene nonwoven fabric, aluminum foil, aluminum vapor-deposited paper, nonflammable processed paper, and combinations of these materials can be used as the face material. Among these, the polyester nonwoven fabric is preferable because it has performances that combine price, heat resistance, and moisture permeability.

The dimensions of the foamed resin layers 13 and 14 can be appropriately set according to the heat insulation properties of the metal sandwich panel 1 and the strength of the panel 1 . The foamed resin layers 13 and 14 can be configured by arranging a plurality of foamed resin boards in the length direction, and the portion exceeding the length of the panel 1 can be cut to match the length. Moreover, the foamed resin layers 13 and 14 can be configured by arranging a plurality of foamed resin boards in the width direction, and the portion exceeding the width of the panel 1 can be cut to match the width. Thus, the foamed resin layers 13 and 14 can be composed of a plurality of foamed resin boards adjacent to each other in the in-plane direction.

Further, in order to achieve both the heat insulating properties and strength of the metal sandwich panel 1 and economic efficiency, the thickness of the foamed resin layers 13 and 14 is preferably 20 to 150 mm, more preferably 30 to 100 mm. Also, the density of the foamed resin layers 13 and 14 is more preferably 0.02 to 0.08 t/m ³ , more preferably 0.025 to 0.05 t/m ³ .

－High rigidity layer－
The heat insulating layer is divided into two or more layers, a high rigidity layer 15 is provided between the heat insulating layers 13 and 14, and the thickness of the heat insulating layers 13 and 14 to which the surface material 11 and the back material 12 are respectively fixed is made different. By changing the supporting state of the surface material 11 and the back material 12, the sound insulation can be improved. The high-rigidity layer 15 has a sufficiently high rigidity compared to the heat insulating layers 13 and 14 so as not to resonate due to vibrations of the surface material 11 and the back material 12 . The out-of-plane bending rigidity of the high-rigidity layer 15 is preferably at least five times the out-of-plane bending rigidity of the heat insulating layers 13 and 14 .

The natural frequency of the surface material 11 and the back material 12, which causes coincidence, depends on the mass of the surface material 11 and the back material 12 and the elastic properties of the heat insulating layers 13 and 14 supporting the surface material 11 and the back material 12, that is, the springs. Determined by the coefficient. The higher the surface density of the surface material 11 and the back material 12, and the smaller the spring coefficient, that is, the thicker the heat insulating layers 13 and 14, the lower the natural frequency of the surface material 11 and the back material 12 (lower frequency). .

Next, if the high-rigidity layer 15 is made of an inorganic material layer, fire resistance can be imparted at a low cost, which is preferable. The high-rigidity layer 15 can be made of lightweight cellular concrete, gypsum board, silica gel board, or the like. Among others, the inorganic material layer 15 is more preferably made of lightweight cellular concrete. As the lightweight cellular concrete, those cured under high temperature and high pressure and reinforced with reinforcing bar mats or metal laths (steel wire netting) that have undergone special antirust treatment inside are preferred. In addition, due to the characteristics of the manufacturing method of lightweight aerated concrete, it is possible to easily arrange reinforcing-bar mats and metal laths inside.

Further, the density of the inorganic material layer 15 is preferably 0.3 to 1.2 t/m ³ , more preferably 0.3 to 0.6 t/m ³ because the balance between lightness and strength is good.

When the inorganic material layer 15 is composed of a gypsum board or a silicate board, these materials have a large amount of water of crystallization and have been widely used for fireproofing in the past. Therefore, it is necessary to increase the thickness and fill the interior with non-combustible reinforcing materials. Since it is difficult to fill the interior with a reinforcing material with the current molding method, it is necessary to use a method such as stacking multiple sheets and sandwiching them between them. Although an organic adhesive can be used to bond the gypsum board and the silica plate, if an inorganic adhesive with a binder such as water glass or colloidal silica and an oxide such as alumina as a filler is used, the heating time will be reduced. It is preferable because the adhesiveness can be maintained for a long time during and after heating.

As the nonflammable reinforcing material, a glass fiber net, a metal lath, or the like can be used.

The dimensions of the inorganic material layer 15 can be appropriately set according to the design of the metal sandwich panel 1 . The inorganic material layer 15 can be configured by arranging a plurality of inorganic boards in the length direction, and the portion exceeding the length of the panel 1 can be cut to match the length. Further, the inorganic material layer 15 can be configured by arranging a plurality of inorganic boards in the width direction, and the portion exceeding the width of the metal sandwich panel 1 can be cut to match the width. Thus, the inorganic material layer 15 can be composed of a plurality of inorganic boards adjacent to each other in the in-plane direction.

When the inorganic material layer 15 is composed of a plurality of inorganic boards, the plurality of inorganic boards may be arranged so that the vertical joints are shifted, or arranged so that the vertical joints are aligned. good.

When the inorganic material layer 15 is composed of a plurality of inorganic boards, the edge surfaces of the plurality of inorganic boards are bonded to each other with a fire-resistant adhesive, or a thermal expansion material is loaded between the edge surfaces of the plurality of inorganic boards. Preferably, a plurality of inorganic boards are fixed to each other against movement in the out-of-plane direction, the in-plane direction, or the out-of-plane and in-plane directions by connecting fittings, or these means are used in combination.

As a fire-resistant adhesive, sodium silicate is the main component, and inorganic components such as silica, kaolin, talc, and clay minerals are added, and organic additives such as styrene-butadiene copolymer are added. Those having improved properties can be used. In addition, cementitious materials to which binders are appropriately added can also be used.

As the thermally expansive material, a sheet-like or string-like thermally expansive material, or a fire-resistant paint, or the like can be used. As a thermally expandable sheet material, it starts to expand at about 150 to 200°C, expands about 5 to 15 times at 300°C, and about 10 to 30 times at 600°C, and does not disappear even at the heating temperature of about 900°C. A sheet containing about half or more of the inorganic material can be processed into a predetermined size and used. As for the composition, for example, expanded graphite as an expanding material is added to an inorganic filler such as boric acid that forms the expanded layer, additives such as mineral oil and carbon black, and a binder such as butyl rubber are added to form a sheet. things can be used. Further, when boric acid is used as the inorganic filler, aluminum oxide is added in a weight ratio of 0.45 to 1.5 with respect to boric acid, and the total content of the silicic acid compound, magnesium salt and calcium salt is By making the weight ratio less than 10% with respect to boric acid, the shape retention ability of the thermally expandable sheet material after expansion can be enhanced, which is preferable.

When the core material 10 is composed of two foamed resin layers 13 and 14 and an inorganic material layer 15 disposed between these two foamed resin layers 13 and 14, horizontal joints in the foamed resin layers 13 and 14 and the horizontal joints in the inorganic material layer 15 are preferably shifted in the longitudinal direction. Thereby, the strength of the metal sandwich panel 1 can be improved. This deviation is preferably about 1 to 3 times the thickness of the foamed resin layers 13 and 14 . In addition, it is preferable to provide the same degree of deviation from the viewpoint of fire resistance, heat insulation, airtightness, sound insulation, and moisture resistance.

As for the adhesion between the inorganic material layer 15 and the foamed resin layers 13 and 14, it is preferable to select a material so as not to cause the carbonized foamed resin layers 13 and 14 to come off as much as possible during the fire resistance test. Although fire resistance is improved by using an inorganic adhesive, it takes time and effort to manufacture the metal sandwich panel 1 . On the other hand, when an organic adhesive is used, considering that the heating side surface temperature of the inorganic material layer 15 remains at 100° C. for a long time while the water of crystallization of the inorganic material layer 15 evaporates during the fire resistance test, a temperature of at least 100° C. is sufficient. It is necessary to select a material that maintains adhesive strength and does not cause deterioration of adhesive strength due to jetting water vapor. Urethane resin, epoxy resin, or the like is preferably used as a material having such properties. Further, it is preferable to use the same adhesive as the adhesive between the surface material 11 (back material 12) and the foamed resin layer 13 (14), because the manufacturing efficiency is excellent.

In addition, the amount of adhesive applied is preferably approximately 100 to 500 g/m ² per layer, and the type and surface flatness of the base material of each adhesive layer, the pressure and time of pressing after application, and the metal sandwich panel 1 determined according to the target performance of

When a large bending load is required for the metal sandwich panel 1, it may be designed so that each adhesive layer is firmly adhered to the base material until it breaks. Between 11 (12) and foamed resin layer 13 (14) is preferably 100 to 300 g/m ² , between foamed resin layers 13 and 14 is preferably 100 to 300 g/m ² , and foamed resin layer 13 (14) and the inorganic material layer 15 is preferably 200 to 500 g/m ² .

If the amount of adhesive applied between the front surface material 11 (back surface material 12) and the foamed resin layer 13 (14) is too large, it will take a long time until the adhesive is peeled off when heated during a fire, which is preferable. do not have. Considering this, the amount of adhesive applied is preferably 100 to 300 g/m ² . It is preferable that the adhesive spreads evenly on each layer by pressing, and the amount of adhesive applied and the press pressure are determined according to the viscosity of the adhesive, the flatness of the material to be adhered, and the ease with which the adhesive spreads. do. Between the foamed resin layers 13 (14) and between the foamed resin layer 13 (14) and the inorganic material layer 15, if too much adhesive is applied, the adhesive will protrude from the layers during pressing. do not have.

When bonding the inorganic material layer 15 and the foamed resin layers 13 and 14 with an adhesive, it is preferable to apply a primer to the surface of the inorganic material layer 15 in advance before applying the adhesive. . Thereby, the inorganic material layer 15 is impregnated with the primer, and the adhesion strength between the inorganic material layer 15 and the foamed resin layers 13 and 14 can be improved.

By applying the primer, it is possible not only to obtain the same adhesive strength even if the amount of adhesive applied is reduced, but also to save the trouble of cleaning the surface of the inorganic material layer 15 from dust, etc. It is possible to reduce the influence of the water content of the layer 15 and reduce the variation in adhesive strength. Furthermore, the overall material costs associated with gluing can be reduced.

Heat resistance can be improved by using thermosetting resins such as epoxy, urethane and phenol as the primer. On the other hand, although acrylic primers are thermoplastic, they have relatively good heat resistance and are particularly excellent in terms of workability and cost.

－High density face material－
In the metal sandwich panel 1, it is essential that the high-density face material 16 is fixed to only one of the surfaces of the surface material 11 and the back material 12 (the surface of the surface material 11 in the example shown in FIG. 1). is. Thereby, the sound insulation of the metal sandwich panel 1 can be improved.

As a material for the high-density surface material 16, a sheet obtained by mixing high-density minerals with rubber or asphalt to increase the specific gravity can be used. Among them, it is preferable to use rubber (because high sound insulation can be realized), and it is more preferable to use non-vulcanized rubber. It is preferable to use a sheet having a nonwoven fabric such as polyester adhered to the surface of the sheet because it is low in cost and has an improved appearance performance. A metal material, an inorganic material, or the like can also be used as the high-density surface material 16 .

It is essential that the high-density face material 16 has an areal density of 0.5 to 4 times the areal density of the surface material 11 or the back material 12 . As shown in Examples to be described later, the sound insulation of the metal sandwich panel 1 is improved by using the high-density surface material 16 having an area density of 0.5 to 4 times the surface density of the surface material 11 or the back surface material 12. can be sufficiently improved.

Note that the surface density of the high-density surface material 16 is a surface density calculated including the weight of the adhesive and double-sided tape used for fixing to the surface material 11 . Moreover, the high-density surface material 16 does not need to be adhered to the entire surface of the surface material 11 or the back material 12, and may be partially adhered. In this case, the surface density of the high-density surface material 16 is obtained by dividing the actual surface density of the high-density surface material 16 by the ratio of the area of the fixed high-density surface material 16 to the entire surface of the surface material 11 or the back surface material 12. means the effective areal density multiplied. The ratio of this area is generally set to 100% (the high-density surface material 16 is fixed to the entire surface of the surface material 11 or the back surface material 12), but the weight reduction of the metal sandwich panel 1 as a whole and the construction work For reasons such as fitting on site, it may be less than 100% (the high-density surface material 16 is fixed only to a portion of the surface material 11 or the back material 12). Even if this area ratio is less than 100%, as long as the effective areal density calculated by the above method is in the range of 0.5 to 4 times the areal density of the surface material 11 or the back material 12 , the sound insulation of the metal sandwich panel 1 can be sufficiently improved.

The method of fixing the high-density face material 16 to the surface material 11 or the back material 12 is not particularly limited, as in the method of fixing the surface material 11 and the back material 12 to the core material 10, and organic adhesives or inorganic adhesives can be used. It can be performed using an adhesive such as an agent, a double-sided tape, or the like. Also, after the parts other than the high-density face material 16 of the metal sandwich panel 1 have been manufactured, they may be fixed using double-sided tape, glue, screws, or the like at a factory or construction site. Also, when the existing wall is repaired for sound insulation, it is preferable to use double-faced tape, screws, or the like, or to fix the high-density surface material 16 with glue applied in advance. In either method, if there is a gap between the surface material 11 or the back material 12 and the high-density surface material 16, vibration will occur and this may adversely affect the sound insulation performance. preferable.

A metal sandwich panel according to a second embodiment of the present invention is a metal sandwich panel in which a surface material and a back material made of a metal material are fixed to the front and back surfaces of a core material, and in which a heat insulating layer having a plurality of core materials and the plurality of heat insulating layers and a high-rigidity layer sandwiched between sheets of heat insulating layers, and the ratio of the thickness of the heat insulating layer on the surface material side to the thickness of the heat insulating layer on the back material side is 1.8 or more and 4.0 or less. It is characterized by

FIG. 2A shows another preferred example of a metal sandwich panel according to the invention. The same reference numerals are assigned to the same configurations as those shown in FIGS. 1A to 1C. In the metal sandwich panel 2 shown in FIG. 2A, a surface material 11 and a back material 12 made of metal material are fixed to front and back surfaces of a core material. The core material is composed of a plurality of heat insulating layers 13 and 14 and a high rigidity layer 15 sandwiched between the plurality of heat insulating layers 13 and 14, and the thickness of the heat insulating layer 14 on the back material 12 side is The thickness ratio of the heat insulating layer 13 on the side of the surface material 11 is set to 1.8 or more and 4.0 or less.

As described above, in the metal sandwich panel 1 of the first embodiment shown in FIGS. The sound insulation performance of the metal sandwich panel 1 is improved by fixing the high-density face material 16 having a surface density of 1 to 4 times.

As a result of the investigation by the present inventor, instead of fixing the high-density face material 16 to the surface of the surface material 11 or the back material 12, the heat insulation layer is divided into two layers, the heat insulation layer 13 and the heat insulation layer 14, and the heat insulation layer A highly rigid layer 15 is provided between 13 and 14 to make the thickness of the heat insulating layer 13 on the surface material 11 side different from the thickness of the heat insulating layer 14 on the back material 12 side, thereby making the cross-sectional structure of the panel asymmetrical. Also, it was found that the sound insulation performance can be improved.

However, even if the thicknesses of the heat insulating layers 13 and 14 are slightly different, the effect of improving the sound insulation performance is not sufficient. It is difficult to deal with the case where the same performance is required from both sides, such as a partition panel, because there is a big difference in the use as a panel. Therefore, as a result of intensive studies by the inventors, the sound insulation performance can be improved by setting the ratio of the thickness of the heat insulating layer 13 on the side of the surface material 11 to the thickness of the heat insulating layer 14 on the side of the back material 12 to 1.8 or more. is obtained sufficiently and is 4.0 or less, there is no significant difference in bending performance, etc., between when viewed from the surface material 11 side and when viewed from the back material 12 side. .

The structures of the surface material 11, the back surface material 12, the heat insulating layers 13 and 14, and the high-rigidity layer 15 in the metal sandwich panel 2 can be the same as those of the metal sandwich panel 1 according to the first embodiment described above. By configuring the heat insulating layers 13 and 14 with foamed resin layers and configuring the high-rigidity layer 15 with an inorganic material layer, it is possible to obtain the metal sandwich panel 2 that is lightweight and has high heat insulating properties.

Moreover, as shown in FIG. 2B, it is preferable that a high-density surface material 16 is fixed to the surface of the surface material 11 of the metal sandwich panel 2 . Thereby, the sound insulation performance of the metal sandwich panel 2 can be further improved. However, in the metal sandwich panel 2, the thicknesses of the heat insulating layers 13 and 14 are different, and the effect of improving the sound insulation performance of the panel has already been obtained. Therefore, in order to further improve the sound insulation performance of the metal sandwich panel 2, it is preferable to use a high-density face material 16 having a higher density than the metal sandwich panel 1 shown in FIGS. 1A to 1C. Specifically, the high-density surface material 16 preferably has an area density of 1.5 to 4.0 times the surface density of the surface material 11 .

As described above, the high-density surface material 16 must be fixed not to the back surface material 12, but to the surface material 11, which is the thicker side of the heat insulation layers 13 and 14. If it is fixed to the back surface material 12 on the side, the sound insulation performance is lowered. Therefore, unlike FIG. 2B, if the heat insulating layer 14 on the backing material side is made thicker, the high-density face material 16 needs to be fixed to the backing material 12 .

A plurality of metal sandwich panels 1 and 2 according to the present invention as described above can be arranged adjacent to each other in the width direction. In this case, it is preferable that the adjacent metal sandwich panels 1 and 2 have inter-panel joints to which the high-density face material 16 is not fixed. As a result, even when the metal sandwich panel undergoes in-plane deformation due to an earthquake or the like, the high-density surface materials do not interfere with each other, so the high-density surface material 16 does not peel off or the high-density surface material 16 inhibits the deformation of the panel. I don't. As a result, the in-plane deformation followability is excellent, and dimensional errors of the high-density surface material 16 can be easily dealt with. Furthermore, as described above, joints do not become a weak point and cause deterioration of sound insulation performance.

(building materials)
Next, the construction material according to the present invention will be explained. FIG. 3A shows an overall view of a partition wall, which is a preferred example of a building material according to the present invention. 3B is a vertical cross-sectional view of the partition wall shown in FIG. 3A, FIG. 3C is a horizontal cross-sectional view, and FIG. 3D is an enlarged view of the inter-panel joint portion of FIG. 3C. The partition wall 3 shown in this figure is a vertical partition wall that spans between floors of the building, that is, between the floor slabs 22 and 23, and is fixed at the upper and lower ends. are arranged adjacent to each other in the width direction, and between the adjacent metal sandwich panels 1, there is a joint between the panels to which the high-density face material 16 is not fixed. The partition wall 3 may be fixed to an upper mounting member 24c attached to a fireproof-coated steel beam or the like placed on the ceiling or floor by using an upper fastening member 24a, or as shown in FIG. Alternatively, a square pipe 30 or the like may be attached instead of the upper mounting member 24c and fixed to the square pipe 30 using a long screw V passing through the metal sandwich panel. The square pipes 30 are fixed to the steel beams 32 via piece angles 31, for example. In addition, the lower part of the partition wall 3 is fixed in the out-of-plane direction by pressing and sandwiching the lower mounting member 25c against both sides of the partition wall 3 and fixing the lower mounting member 25c to the floor surface with the lower anchor member 25b. . Furthermore, when fixing the partition wall 3 also in the in-plane direction, the lower fastening member 25a is screwed into the surface member 11 through a circular hole or an elongated hole previously provided in the lower mounting member 25c. However, if the frame is a steel structure and the interlayer deformation amount is large, even if the lower fastening member 25a is omitted, it is restrained in the out-of-plane direction and does not collapse, and the in-plane deformation follow-up performance is excellent, which is preferable. In the case of an application that requires a heat insulating material to be placed on the floor surface as well, after stacking the heat insulating material from the floor slab surface on both sides of the partition wall 3, concrete is placed on the heat insulating material to form the floor. It is often finished as a plane, and in this case, the metal sandwich panel 1 is fixed in the out-of-plane direction by concrete on both sides. The partition wall 3 has a plurality of metal sandwich panels 1 according to the present invention arranged adjacent to each other in the width direction.

Further, as shown in FIG. 3C, if the joints of the plurality of metal sandwich panels 1 are filled with a thermal expansion material 21, the fire resistance can be improved, which is preferable. Further, as shown in FIG. 4D , a bond breaker material 29 for securing elongation performance of the sealing material 28 is laid in the joints between the metal sandwich panels 1, and then the sealing material 28 is cast. The surface of 28 and the surface of the high-density face material 16 are flush. The sealing material 28 improves the airtightness, and the joint serves as an accent, thereby improving the appearance. Moreover, since the surface of the sealing material 28 is exposed without the high-density surface material 16 and the like, the sealing material 28 hardens quickly, and the construction period can be shortened.

The type of sealing material is not particularly limited, and sealing materials such as modified silicon, silicon, polysulfide, and urethane can be used.

Moreover, FIG. 3E is an enlarged view of another example of the joint portion between panels, and the surface material 11 and the back material 12 have second bent portions 11bi and 11bo in addition to the first bent portion 11a. It differs from FIG. 3D in that a bond breaker material 29 is laid on the surfaces of the second bent portions 11bi and 11bo. Further, in the example of FIG. 3D, the metal sandwich panel 1 with the high-density face material 16 preliminarily fixed at the factory is manufactured, and after the installation at the construction site, the sealing material 28 is applied to the joint portion. The surface of the is almost flush with the surface of the high-density surface material 16, but in FIG. As a result, the surface of the sealing material 28 is sunk from the surface of the high-density surface material 16 . If the existing sealing material 28 does not deteriorate over time, the airtightness and appearance can be exhibited in the same way as when the sealing material 28 is placed at the same time as the panel is erected. , the sealing material 28 may be additionally applied. Note that the presence or absence of the sealing material 28 does not affect the sound insulation performance of the building material comprising the metal sandwich panel 1 of the present invention.

The lower part of the partition wall 3 is fixed to the floor slab 23 by means of lower fastening members 25a and lower anchor members 25b via lower mounting members 25c. Although not shown, the upper part of the partition wall 3 is similarly fixed to the floor slab 22 via the upper mounting member 24c by the upper fastening member 24a and the upper anchor member 24b. The joint between the partition wall 3 and the floor slab 22 is filled with an upper joint material 26, and the joint between the partition wall 3 and the floor slab 23 is filled with a lower joint material 27. .

The upper anchor member 24b and the lower anchor member 25b are selected to withstand the inertial force of about 1 G acting during an earthquake, which is the design load of a normal partition wall. Concrete anchor materials with a depth of about 30 to 70 mm are placed in the necessary number according to the bearing capacity.

As the thermal expansion material 21 filled in the joints between the plurality of panels 1, the same thermal expansion material as used in the joints when the plurality of inorganic material layers 15 are arranged can be used.

In addition, the upper joint material 26 and the lower joint material 27 do not create a gap through which flames and heat can penetrate when the wall material is displaced or rotated during a fire, and the function of the wall material as a fire stop material is impaired. It is a material that does not cause chipping or falling off, and also reduces heat transmission flow in normal times. As the upper joint material 26 and the lower joint material 27, ceramic fiber, alkaline earth silicate blanket (biosoluble fiber), or the like can be used.

Although FIGS. 3A to 3C illustrate the case where the partition wall 3 is constructed by arranging a plurality of metal sandwich panels 1 according to the present invention in the width direction, the present invention is not limited to this. For example, the partition wall 3 can be constructed using the metal sandwich panel 2 shown in FIGS. 2A and 2B, and can be used not as a partition wall but as a floor or ceiling material.

Examples of the present invention will be described below, but the present invention is not limited to these examples.

(Example 1)
A metal sandwich panel 1 shown in FIGS. 1A-1C was fabricated. First, two coated galvalume steel plates (registered trademark) as the surface material 11 and the back material 12 (dimensions: 2665 mm × 888 with a 10 mm wide bent portion, thickness: 0.4 mm (JISG3321), surface density: 3.3 kg / m ² ), 2 types of phenolic foam boards as foamed resin layers, 3 sheets each, total 6 sheets (first phenolic foam board (Neomafoam (registered trademark) manufactured by Asahi Kasei Construction Materials Co., Ltd., dimensions: 1828 mm × 913 mm, thickness: 65 mm , density: 40 kg/m ³ ), and a second phenolic foam plate (Neomafoam (registered trademark) manufactured by Asahi Kasei Construction Materials Co., Ltd., dimensions: 1820 mm × 910 mm, thickness: 50 mm, density: 40 kg/m ³ )), inorganic material layer 3 sheets of lightweight cellular concrete as 15 (power board NEXT manufactured by Asahi Kasei Kenzai Co., Ltd., dimensions: 1820 mm × 606 mm, thickness: 36 mm, density: 350 kg / m ³ ), non-vulcanized rubber, resin, inorganic as high-density surface material A surface material (manufactured by Saitama Rubber Co., Ltd., model number: SR1165FA, thickness 3 mm, surface density 5.5 kg/m ² ) is made by fixing polyester nonwoven fabric on the surface of a sheet made of filler, blown asphalt, etc., and acrylic adhesive on the back surface. each prepared.

Next, coated galvalume steel plate (registered trademark), second phenolic foam plate (thickness: 50 mm), first phenolic foam plate (thickness: 65 mm), lightweight cellular concrete (thickness: 36 mm), first phenolic foam plate , a second phenolic foam plate, and a coated galvalume steel plate (registered trademark) were laminated and bonded in this order using a urethane-based adhesive (KU570 manufactured by Konishi Co., Ltd.). The amount of adhesive to be applied is 150 to 200 g/m ² between the coated galvalume steel plate (registered trademark) and the phenolic foam plate and between the phenolic foam plates, and 200 to 300 g/m 2 between the lightweight cellular concrete and the phenolic foam plate. m ² and cured for one night with a press of 1 t/m ² . Next, a sheet made of non-vulcanized rubber, resin, inorganic filler, blown asphalt, etc. is adhered to the entire surface of the surface material 11 using an acrylic adhesive (weight: 70 g/m ² ) pre-applied to the sheet. bottom. Thus, a metal sandwich panel 1 was obtained. Details of the metal sandwich panel according to Example 1 are shown in Table 1.

(Comparative example 1)
A metal sandwich panel was produced in the same manner as in Example 1. However, the high-density surface material 16 was not adhered to the surface of the surface material 11 . All other configurations are the same as those of the first embodiment. Details of the metal sandwich panel according to Comparative Example 1 are shown in Table 1.

(Example 2)
A metal sandwich panel was produced in the same manner as in Example 1. However, the metal sandwich panel according to Example 2 is the metal sandwich panel 2 shown in FIG. state), the thickness of the phenolic foam plate on the back material 12 side is 98 mm (one first phenolic foam plate (65mm thick) and a third phenolic foam plate (Neomafoam (registered trademark) manufactured by Asahi Kasei Construction Materials Co., Ltd., dimensions: 1828 mm × 913 mm, thickness: 33 mm, density: 40 kg/m ³ ), and the ratio of the thickness of the phenol foam plate on the surface material 11 side to the thickness of the phenol foam plate on the back surface material 12 side is 1. .33. As the high-density face material 16, a face material (manufactured by Saitama Rubber Co., Ltd., model number: SR1165F, thickness 3 mm, Surface density of 5.5 kg/m ² ) was adhered on site using double-sided acrylic adhesive tape (weight of 0.1 kg/m ² ) over about 70% of the area. All other configurations are the same as those of the first embodiment. Details of the metal sandwich panel according to Example 2 are shown in Table 1.

(Comparative example 2)
A metal sandwich panel was produced in the same manner as in Example 2. However, the high-density surface material 16 was not adhered to the surface of the surface material 11 . All other configurations are the same as those of the second embodiment. Details of the metal sandwich panel according to Comparative Example 2 are shown in Table 1.

(Example 3)
A metal sandwich panel was produced in the same manner as in Example 2. However, the thickness of the high-density surface material 16 fixed to the surface of the surface material 11 was set to 5.5 mm (area density of 10.0 kg/m ² ). All other configurations are the same as those of the second embodiment. Details of the metal sandwich panel according to Example 3 are shown in Table 1.

(Comparative Example 3)
A metal sandwich panel was produced in the same manner as in Comparative Example 1. However, the thickness of the surface material 11 and the back material was 0.8 mm (area density: 6.4 kg/m ² ). All other configurations are the same as in Comparative Example 1. Details of the metal sandwich panel according to Comparative Example 3 are shown in Table 1.

(Comparative Example 4)
A metal sandwich panel was produced in the same manner as in Comparative Example 2. However, the thickness of the surface material 11 and the back material was 0.8 mm (area density: 6.4 kg/m ² ). All other configurations are the same as those of Comparative Example 2. Details of the metal sandwich panel according to Comparative Example 4 are shown in Table 1.

(Example 4)
A metal sandwich panel was produced in the same manner as in Example 3. However, the thickness of the surface material 11 and the back material was 0.8 mm (area density: 6.4 kg/m ² ). All other configurations are the same as those of the third embodiment. Details of the metal sandwich panel according to Example 4 are shown in Table 1.

(Comparative Example 5)
A metal sandwich panel was produced in the same manner as in Comparative Example 1. However, the thickness of the phenolic foam plate on the surface material 11 side is 98 mm (a state in which one first phenolic foam plate (65mm thick) and one third phenolic foam plate (33mm thick) are stacked), and the backing material 12 The thickness of the side phenolic foam plate was also 98 mm (a state in which one first phenolic foam plate (65mm thick) and one third phenolic foam plate (33mm thick) were stacked). All other configurations are the same as in Comparative Example 1. Details of the metal sandwich panel according to Comparative Example 5 are shown in Table 2.

(Example 5)
A metal sandwich panel was produced in the same manner as in Comparative Example 5. However, the thickness of the phenol foam plate on the surface material 11 side is 130 mm (a state in which two first phenol foam plates (65 mm thick) are stacked), and the thickness of the phenol foam plate on the back material 12 side is 65 mm (the first phenol foam plate). The ratio of the thickness of the phenolic foam plate on the surface material 11 side to the thickness of the phenolic foam plate on the backing material 12 side was 2. All other configurations are the same as those of Comparative Example 5. Details of the metal sandwich panel according to Example 5 are shown in Table 2.

(Comparative Example 6)
A metal sandwich panel was produced in the same manner as in Comparative Example 5. However, the thickness of the surface material 11 and the back material was 0.8 mm (area density: 6.4 kg/m ² ). All other configurations are the same as those of Comparative Example 5. Details of the metal sandwich panel according to Comparative Example 6 are shown in Table 2.

(Example 6)
A metal sandwich panel was produced in the same manner as in Example 5. However, the thickness of the surface material 11 and the back material was 0.8 mm (area density: 6.4 kg/m ² ). All other configurations are the same as those of the fifth embodiment. Details of the metal sandwich panel according to Example 6 are shown in Table 2.

(Example 7)
A metal sandwich panel was produced in the same manner as in Example 6. However, as the high-density surface material 16 fixed to the surface of the surface material 11, two sheets made of non-vulcanized rubber, resin, inorganic filler, blown asphalt, etc. (manufactured by Saitama Rubber Co., model number: SR1165FA, thickness 3 mm) Laminated, areal density 11.0 kg/m ² ) was used. All other configurations are the same as those of the sixth embodiment. Details of the metal sandwich panel according to Example 7 are shown in Table 2.

(Comparative Example 7)
A metal sandwich panel was produced in the same manner as in Comparative Example 6. However, the thickness of the phenolic foam plate on the surface material 11 side is 83 mm (a state in which one second phenolic foam plate (50mm thick) and one third phenolic foam plate (33mm thick) are stacked), and the backing material 12 The thickness of the side phenolic foam plate was also 83 mm (a state in which one second phenolic foam plate (50mm thick) and one third phenolic foam plate (33mm thick) were stacked). All other configurations are the same as in Comparative Example 6. Details of the metal sandwich panel according to Comparative Example 7 are shown in Table 2.

(Example 8)
A metal sandwich panel was produced in the same manner as in Example 6. However, the thickness of the phenol foam plate on the surface material 11 side is 130 mm (a state in which two first phenol foam plates (65 mm thick) are stacked), and the thickness of the phenol foam plate on the back material 12 side is 33 mm (the third phenol foam plate). The ratio of the thickness of the phenolic foam plate on the surface material 11 side to the thickness of the phenolic foam plate on the backing material 12 side was 3.94. All other configurations are the same as those of the sixth embodiment. Details of the metal sandwich panel according to Example 8 are shown in Table 2.

(Example 9)
A metal sandwich panel was produced in the same manner as in Example 8. However, the same high-density surface material as in Example 1 was adhered to the surface of the surface material 11 as the high-density surface material 16 . All other configurations are the same as those of the eighth embodiment. Details of the metal sandwich panel according to Example 9 are shown in Table 2.

(Comparative Example 8)
A metal sandwich panel was produced in the same manner as in Comparative Example 7. However, the thickness of the phenol foam board on the surface material 11 side is 65 mm (one first phenol foam board (65 mm thick)), and the thickness of the phenol foam board on the back material 12 side is also 65 mm (the first phenol foam board (65 mm thick) (thickness) 1 sheet), and other configurations are all the same as in Comparative Example 7. Details of the metal sandwich panel according to Comparative Example 8 are shown in Table 3.

(Example 10)
A metal sandwich panel was produced in the same manner as in Comparative Example 8. However, the thickness of the phenolic foam plate on the surface material 11 side is 98 mm (a state in which one first phenolic foam plate (65mm thick) and one third phenolic foam plate (33mm thick) are stacked), and the backing material 12 The thickness of the phenolic foam plate on the side is 33 mm (one third phenolic foam plate (33 mm thick)), and the ratio of the thickness of the phenolic foam plate on the surface material 11 side to the thickness of the phenolic foam plate on the back material 12 side is 2. .97. All other configurations are the same as those of Comparative Example 8. Details of the metal sandwich panel according to Example 10 are shown in Table 3.

(Example 11)
A metal sandwich panel was produced in the same manner as in Example 10. However, as a high-density surface material 16 on the surface of the surface material 11, a sheet made of non-vulcanized rubber, resin, inorganic filler, blown asphalt, etc. (manufactured by Saitama Rubber Co., model number: SR1165FA, thickness 3 mm, two sheets stacked, surface density of 11.0 kg/m ² ) was used. All other configurations are the same as those of the tenth embodiment. Details of the metal sandwich panel according to Example 11 are shown in Table 3.

(Comparative Example 9)
A metal sandwich panel was produced in the same manner as in Comparative Example 5. However, the thickness of the phenol foam board on the surface material 11 side is 50 mm (one second phenol foam board (50 mm thick)), and the thickness of the phenol foam board on the back material 12 side is also 50 mm (the second phenol foam board (50 mm thick) thickness) 1 sheet). All other configurations are the same as those of Comparative Example 5. Details of the metal sandwich panel according to Comparative Example 9 are shown in Table 3.

(Example 12)
A metal sandwich panel was produced in the same manner as in Comparative Example 9. However, the thickness of the phenol foam board on the surface material 11 side is 65 mm (one first phenol foam board (65 mm thick)), and the thickness of the phenol foam board on the back material 12 side is 33 mm (the third phenol foam board (33 mm 1 sheet), and the ratio of the thickness of the phenolic foam plate on the surface material 11 side to the thickness of the phenolic foam plate on the backing material 12 side was set to 1.97. All other configurations are the same as those of Comparative Example 9. Details of the metal sandwich panel according to Example 12 are shown in Table 3.

(Comparative Example 10)
A metal sandwich panel was produced in the same manner as in Comparative Example 9. However, the thickness of the phenol foam board on the surface material 11 side is 33 mm (one third phenol foam board (33 mm thick)), and the thickness of the phenol foam board on the back material 12 side is also 33 mm (second phenol foam board (50 mm thick)). thickness) 1 sheet). All other configurations are the same as those of Comparative Example 9. Details of the metal sandwich panel according to Comparative Example 10 are shown in Table 3.

(Example 13)
A metal sandwich panel was produced in the same manner as in Comparative Example 10. However, as the high-density surface material 16, 82% of the surface of the surface material 11 is a sheet made of rubber, asphalt, inorganic filler, etc. (manufactured by Saitama Rubber Co., model number: 1530, thickness 1.5 mm, surface density 2 .6 kg/m ² ) was adhered using an acrylic adhesive double-sided tape (weight: 100 g/m ² ). All other configurations are the same as those of the tenth embodiment. Details of the metal sandwich panel according to Example 13 are shown in Table 3.

(Example 14)
A metal sandwich panel was produced in the same manner as in Example 13. However, as the high-density surface material 16, a sheet made of rubber, asphalt, inorganic filler, etc. (manufactured by Saitama Rubber Co., Ltd., model number: 1532, thickness 3 mm, surface density 5.1 kg) is applied to 58% of the surface of the surface material 11. /m ² ) was fixed. All other configurations are the same as those of the thirteenth embodiment. Details of the metal sandwich panel according to Example 14 are shown in Table 3.

<Sound insulation performance evaluation>
The sound insulation performance of the metal sandwich panels of Examples 1-14 and Comparative Examples 1-10 was evaluated. Specifically, the transmission loss at each frequency in the frequency band from 125 Hz to 4000 Hz was evaluated according to JISA1419-1 2000. Table 1 shows the transmission loss obtained. Table 1 also shows the weighted transmission loss weighted for each frequency for the transmission loss from 800 Hz to 2500 Hz. This weighted transmission loss was determined according to JISA1419-12000. The sound insulation performance of each metal sandwich panel was evaluated based on the obtained minimum value of weighted transmission loss. The surface density of the high-density surface material 16 in Tables 1 to 3 also includes the weight of the pressure-sensitive adhesive and double-sided tape used to adhere to the surface material 11 . In addition, when the high-density surface material 16 is fixed to a part of the surface material 11 (in the case of partial attachment), the surface density of the high-density surface material 16 is the actual surface density of the high-density surface material 16. The effective area density is obtained by multiplying the ratio of the area of the fixed high-density surface material 16 to the entire surface of the surface material 11 .

As is clear from Table 1, a metal sandwich panel (e.g., Example 1 , Example 2), the minimum value of the weighted transmission loss is increased compared to the metal sandwich panel (Comparative Example 1, Comparative Example 2) to which the high-density face material 16 is not fixed. From the results of Examples 1 and 2, it can be seen that the effect of improving the sound insulation performance is obtained regardless of whether the cross-sectional structure of the panel is symmetrical or asymmetrical. It is said that the human sense of hearing can distinguish a difference in sound volume if there is a difference of about 3 dB, but the present invention has a sound insulation effect of approximately 5 dB or more, which is effective.

Furthermore, the effect of improving the sound insulation performance in the frequency range where the weighted transmission loss is the smallest in the comparative example is greater, and when the noise source is specified and the present invention is used as a countermeasure against noise at a specific frequency, the effect is extremely large. have
In addition, it is easy to apply the high-density face material to existing walls after the building is completed, and the present invention is extremely effective as a sound insulation repair method.

Also, as is clear from Table 2, even in a panel in which the high-density face material 16 is not fixed to the surface of the surface material 11, the heat insulation on the surface material 11 side with respect to the thickness of the heat insulation layer 14 on the back material 12 side Panels in which the thickness ratio of the layer 13 is 1.8 or more and 4.0 or less (e.g., Examples 5 and 6) are compared to panels in which the ratio is 1 (e.g., Comparative Examples 5 and 6). It can be seen that the sound insulation performance is improved. Furthermore, from a comparison between Examples 6 and 7 and a comparison between Examples 8 and 9, it was found that the sound insulation performance was further improved by adhering the high-density surface material 16 to the surface of the surface material 11. I understand.

From the data shown in Tables 1 to 3, it can be seen that the effect of improving the sound insulation performance of the metal sandwich panel according to the present invention is obtained regardless of the thickness of the core material.

ADVANTAGE OF THE INVENTION According to this invention, the metal sandwich panel and building material which were excellent in sound insulation performance can be provided.

1, 2 metal sandwich panel 3 partition wall 11 surface material 12 back material 13, 14 heat insulating layer (foamed resin layer)
15 High rigidity layer (inorganic material layer)
16 High density face material 21 Thermal expansion material 22, 23 Floor slab 24a Upper fastening material 24b Upper anchor material 24c Upper mounting material 25a Lower fastening material 25b Lower anchor material 25c Lower mounting material 26 Upper joint material 27 Lower joint material 28 Sealing material 29 bond breaker 30 square pike 31 piece angle 32 steel beam V screw

Claims (6)

In a metal sandwich panel in which a surface material and a back material made of metal are fixed to the front and back surfaces of a core material,
A metal characterized in that a high-density surface material having an areal density of 0.5 to 4 times the surface density of the surface material or the back material is fixed to the surface of the surface material or the back material. sandwich panel. In a metal sandwich panel in which a surface material and a back material made of metal are fixed to the front and back surfaces of a core material,
The core material consists of a plurality of heat insulating layers and a high-rigidity layer sandwiched between the plurality of heat insulating layers,
A metal sandwich panel, wherein a ratio of the thickness of the heat insulating layer on the surface material side to the thickness of the heat insulating layer on the back material side is 1.8 or more and 4.0 or less. 3. The metal sandwich panel according to claim 2, wherein a high-density surface material having an area density of 1.5 to 4.0 times the surface density of the surface material is adhered to the surface of the surface material. 4. The metal sandwich panel according to claim 2, wherein said heat insulating layer is a foamed resin layer, and said high-rigidity layer is an inorganic material layer. A panel in which a plurality of metal sandwich panels according to any one of claims 1 to 4 are arranged adjacent to each other in the width direction, and the high-density face material is not fixed between the adjacent metal sandwich panels. A metal sandwich panel with joints. A building material comprising the metal sandwich panel according to claim 5, wherein a sealing material is cast in the joint between the panels.

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