JP2001348989A - Ceiling member having low emissivity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material useful as a ceiling member having insulation ability, a low heat emission, an excellent sound absorbing characteristics, specially a low luster and good design performance. SOLUTION: A sheet-shaped ceiling material with emissivity of 0.3 to 0.6 measured in conformity with JIS A 1432 (simplified measuring method for the emissivity by infrared radiation thermometer) is characteristically applied at least to the whole surface of a plate-shaped member with the heat transfer coefficient of less than 0.2 W/mK (at 25 deg.C).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling material, and more particularly to a ceiling material for a building having a high ceiling.

[0002]

2. Description of the Related Art Conventionally, in the roof of a normal building, the roof and ceiling are insulated with a plate-like material to suppress the heat up of the room due to the solar radiation. On the other hand, in buildings with high ceilings, such as gymnasiums and halls, even if the ceilings are sufficiently insulated to suppress heat intrusion from the outside, in general the movement of indoor heat due to the buoyancy of air causes The temperature near the ceiling was higher than the temperature near the floor, and a temperature difference of 15 to 20 ° C. often occurred between the floor and the ceiling.

[0003] The above-mentioned temperature difference causes heat transfer from the ceiling surface to the floor surface due to radiant heat, and has a problem that the sensible temperature near the floor rises excessively compared with the room temperature at that location. This problem occurred particularly in the summer, and had a problem that a large amount of energy was required to cool it. Further, this problem is not limited to the summer season. For example, in a facility in a large space such as an indoor artificial ski resort, there is a problem that the heat transfer due to the radiant heat is large, and the snow on the floor is easily melted.

[0004] In order to solve the above problems, as a building material, a sheet material in which aluminum foil is reinforced with kraft paper or glass cloth, a polished copper plate, or a plastic film in which aluminum is vapor-deposited has a relatively low emissivity. It is considered that the use of a sheet material or the like makes it possible to reduce the heat transfer due to the radiant heat.
However, both materials may be excessively glossy or colored to lower the emissivity, but the color is limited, so for indoors, the color of the ceiling material is uncomfortable. And it is not suitable for ceiling materials requiring designability.

When a ceiling material is used as a screen as a hall of an amusement facility and an image of the sky or the like is projected, it is difficult to project the image if the image is glossy or the color is limited. Had a problem. Further, since the use of the above-mentioned material does not have air permeability, there is a problem that even if the material is applied to a material having excellent sound absorbing properties such as glass wool, the sound absorbing property is poor, and the interior tends to reverberate.

As a low-emissivity building material having no luster, there is a plate-like material obtained by foaming aluminum. However, although it is excellent in that it does not have luster, it is expensive and has poor heat insulating performance. Therefore, there is a disadvantage that heat on the roof surface due to solar radiation or the like is transmitted to the room. In addition, it is a material that is not suitable for ceilings in large spaces because of its heavy weight per area.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and it is required to have heat insulation, low radiant heat, excellent sound absorption characteristics, low gloss, and design. It is intended to provide a ceiling material useful as a ceiling material.

[0008]

The above object is achieved by the following invention. That is, the present invention, JIS A 1432
A sheet material having an emissivity of 0.3 to 0.6 measured by (simple emissivity measurement method using an infrared radiation thermometer) is a plate-like material having a thermal conductivity of 0.2 W / mK (at 25 ° C.) or less. A ceiling material provided on at least one surface of the ceiling material. Further, the present invention provides a ceiling material, wherein the sheet material has a glossiness of not more than 20 measured by a method (60 ° specular glossiness) according to JIS Z 8741 (specular glossiness measuring method).

[0009]

Next, the present invention will be described in more detail with reference to preferred embodiments. As for the ceiling material of the present invention, as shown in FIG. 1, a sheet-like material B is provided on at least one surface of a plate-like material A having excellent heat insulation properties by using an adhesive C as necessary. Wherein the plate-like material A is
It is a plate-like material having a thermal conductivity of 0.2 W / mK (at 25 ° C.) or less, and the sheet material B has an emissivity of 0.3 to 0.6 measured according to JIS A 1432. I have.

[0010] The plate-like material A used in the present invention must have a thermal conductivity of 0.2 W / mK or less.
/ MK or less. If the thermal conductivity exceeds 0.2 W / mK, the amount of heat transferred from the roof due to solar radiation or the like increases, which is not preferable.

The plate-like material used in the present invention is not particularly limited as long as it has a thermal conductivity of 0.2 W / mK or less, and is relatively hard and rigid, or a cotton-like material having a relatively low density. Matte-shaped ones, for example, fibrous materials such as glass wool, rock wool, cellulose fiber, wool, and organic fiber cotton, wood chip glued materials, cork glued materials, wood-based materials made of pulp, polystyrene foam, phenol Organic foams such as resin foams and urethane resin foams are exemplified. Further, a slurry-like mixture is prepared by adding an organic or inorganic adhesive component to the above-described material, and then a plate-like material obtained by solidification or curing, or a honeycomb sandwich plate made of a metal material, a resin or pulp is used as a material. Is also preferably adopted. These can be used alone or in combination.

The above-mentioned plate-like material varies depending on required characteristics, but it is preferable to use glass wool or rock wool so as to satisfy the sound absorbing property, the incombustibility and the weight reduction. Further, the density of the plate-like material is 8 to 500 kg /
m ³ is preferred, and the density is particularly preferably from 32 to 150 kg / m ³ for imparting rigidity and reducing the weight. If the density is less than 8 kg / m ³ , it is difficult to maintain the shape of the plate-like object, while if the density exceeds 500 kg / m ³ , the sound absorption is reduced and the weight is increased, so that it is preferable. Absent.

Examples of the base material of the sheet material B used in the present invention include fibrous base materials such as woven and non-woven fabrics made of glass fibers, carbon fibers and organic fibers, resin films and papers. Among them, it is preferable to use a woven fabric or a nonwoven fabric of the glass fiber or the organic fiber because it is porous, has good air permeability, suppresses gloss, and is inexpensive. When a fibrous base material such as a woven fabric or a nonwoven fabric is used as the base material of the sheet material B in order to enhance the sound absorbing property of the ceiling material by integrating with the plate-like material, JIS L
1096 breathable as measured by breathable A method (general fabric test method) is preferably not less than 1.0cc / cm ² · sec, and more preferably in the range of 10~400cc / cm ² · sec.

The woven or non-woven fabric has a basis weight of 30.
It is preferable that it is ６００600 g / m ² . The basis weight is 6
200 g / m ² larger than the platelet and combination with undesirably sound absorption coefficient is inferior of the ceiling material, whereas, undesirably 30 g / m ² less than the emissivity is low. When the resin film is used as the base material of the sheet material B, the porosity is preferably 1 to 10%. If the porosity is less than 1%, the sound absorption coefficient when used in combination with a heat insulating material is inferior, and if it exceeds 10%, the film is easily damaged and may be damaged. Since the emissivity is lowered, the handling property is lacking, which is not preferable. On the other hand, if the basis weight is smaller than the above or the porosity exceeds the above value, the emissivity of the obtained sheet-like material is undesirably reduced.

Further, the resin film has a thickness of 7-1.
It is preferably 00 μm. When the film thickness is less than 7 μm, it is difficult to attach the film to the plate-like material A.
If it exceeds 0 μm, the ceiling material obtained by laminating it to a plate-like material is difficult to obtain nonflammability, which is not preferable. The resin used for the resin film is not particularly limited as long as it is a resin generally forming a film, and examples thereof include polyvinyl chloride, polyvinylidene chloride, polyethylene, polypropylene, and polyester.

As the base material of the sheet material B, it is preferable that the surface of the base material is coated with a metal material. The metal material is not particularly limited, and examples thereof include metal materials such as gold, silver, copper, aluminum, nickel, chromium, and titanium, and alloys of the metal materials such as monel and stainless steel. Further, these metal materials may be a single layer or multiple layers.

The alloy can be adapted to a required material by changing the ratio of constituent metals. For example, the monel is mainly composed of copper and nickel, but the proportion thereof can be changed depending on the required properties of the ceiling material, and other metals such as iron and manganese can be added as appropriate. These metal materials vary depending on the method of coating the substrate, but a sheet coated with a metal material such as stainless steel or Monel is preferable because of its excellent corrosion resistance. It is particularly preferred for reducing the rate.

The method of coating the surface of the base material with a metal material is not particularly limited, and examples thereof include the following method. a. A method in which a fibrous base material such as a woven fabric or a nonwoven fabric is used and the above-described metal material is attached to the surface of the base material by sputtering or vacuum deposition. b. A method of applying a resin-based paint mixed with a powder of the metal material using a fibrous base material such as a woven fabric or a nonwoven fabric. c. A method in which a fibrous base material such as a woven or nonwoven fabric, a base material such as a resin film or paper is used as a backing material, and a metal foil is adhered to the backing material. Preferably, a method of further applying a resin paint mixed with a matting agent to the metal foil. d. A method in which a metal material is vacuum-deposited on a resin film, followed by matting and coloring. e. A method of applying a resin paint mixed with the metal material powder to a resin film.

The sheet material B obtained by the above method a is excellent in air permeability since the base material has air permeability, and becomes a sheet having a sufficiently low emissivity by coating with a small amount of metal material. Furthermore, it is excellent in workability such as cutting and bending.
The thickness of the metal material to be coated is preferably 300 to 1200 °. When the angle is less than 300 °, the gloss of the sheet material is reduced, but the emissivity is set to 0.3 to 0.5.
6 is difficult to maintain, while if it exceeds 1200 °, the cost increases, which is not preferable. As an example of the metal material used in the method (a), aluminum, monel, or the like is preferably adopted, so that the sheet material B having a low emissivity can be obtained with a small amount of the metal material.

In the method (b), since the coloring can be performed simultaneously with the coating of the metal material, the method is suitable for further improving the design of the sheet material B, and is excellent in productivity. The obtained sheet material has good air permeability as described above, and also has excellent workability such as cutting and bending since the fibers are covered with the resin in the paint. The resin coating is preferably used alone polyvinyl chloride, polyvinylidene chloride, vinyl acetate, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, or a resin of a blend or copolymer thereof, Acrylic resins such as acrylic acid or polymethacrylic acid are particularly preferred for better adhesion to nonwoven fabrics. Moreover, an epoxy resin and a urethane resin are also mentioned, and these can be used alone or in combination.

In the method (c), the sheet material B is inexpensively produced by a relatively simple method of attaching a metal foil to a fibrous base material such as a woven or nonwoven fabric, or a base material such as a resin film or paper. It is preferable because it can be created. The metal foil in this case is
Those having a thickness of 7 to 500 μm are preferred. If it is less than 7 μm, the metal foil tends to peel off, while if it exceeds 500 μm, the workability such as cutting and bending is poor, which is not preferable. In addition, it is preferable to use a metal material such as copper or aluminum for the metal foil, and it is particularly preferable to use an aluminum foil in order to reduce the emissivity of the obtained sheet material.

The method of attaching the metal foil to the woven or nonwoven fabric depends on the material of the base material, and includes a method of integrating them by heating and pressing, and a method of integrating them by using an adhesive. Can be The obtained sheet material B preferably has holes in the metal foil in order to ensure air permeability. For this reason, a method is used in which holes are formed before the metal foil is attached to the woven or nonwoven fabric, or holes are formed by a method such as needling after being integrated with the woven or nonwoven fabric. The porosity of the holes is preferably 1 to 10%.

In the above method d, since the base material is a resin film and the vapor deposition efficiency of the metal material is high, the sheet material B can be produced at a low cost by a relatively simple method, and the emissivity can be reduced. It is easy to color while keeping it low, and the emissivity of the sheet material can be reduced relatively easily. Examples of the resin film include resins such as polyvinyl chloride, polyvinylidene chloride, polyethylene, and polyester.These resins can be used alone, or can be used as a blend or a copolymer. It can be used after being laminated.

Aluminum or Monel is preferably used as the metal material used for the vapor deposition process. After deposition,
When matte or colored coating is performed, it is possible to apply a paint (ink) by using the resin paint used in the above b and containing a matting agent and a pigment. Further, in order to improve the air permeability, a method of forming a hole before metal deposition on the resin film or a method of forming a hole after vapor deposition is adopted. In addition, the gloss is reduced to improve the design,
In order to improve workability in bonding to a plate-like material, it is preferable that embossing is performed in the state of the base material or in the state of a sheet-like material. The obtained sheet material has a thickness of 300 to 12 of the coated metal material.
It is preferably 00 °. When the film thickness is less than 300 °, the gloss is reduced, but the emissivity is 0.3 to 0.6.
Is difficult to maintain, while the film thickness is 1200
Exceeding the cost is undesirably high.

The metal material may be coated with the metal material on the base material to obtain a sheet material B and then integrated with the plate material A. After the base material of the sheet material is integrated with the material A, the metal material can be coated.

The sheet-like material B obtained as described above
Has an emissivity of 0.3 to 0.6 measured according to JIS A 1432.
It is necessary to be. If the emissivity is less than 0.3, it is glossy and inferior in design, while the emissivity is less than 0.3.
If it exceeds 6, heat transfer due to radiant heat increases, which is not preferable.

Further, the sheet material B is JIS Z 8741
Is preferably 20 or less as measured by the method (60 ° specular gloss). When the glossiness exceeds 20,
The gloss becomes strong and the design is poor, which is not preferable. Further, the sheet material preferably has an air permeability of 1.0 to 300 cc / cm ² · sec according to the method A of the air permeability test of JIS L 1096. The air permeability is 1.0 cc / cm ² · s
If it is smaller than ec, the sound absorption of the ceiling is reduced, while 30
If it is greater than 0 cc / cm ² · sec, the emissivity is undesirably reduced.

The method of obtaining the ceiling material by integrating the sheet material B with the sheet material A is not particularly limited, but at least one surface of the sheet material A, that is, the indoor surface of the sheet material,
It is obtained by coating the surface of the sheet material B having an emissivity of 0.3 to 0.6 toward the indoor side. The coating method may be such that the sheet-like material B is adhered to a surface to be arranged on the indoor side of the plate-like material A or a part or the whole of the other surface using an adhesive such as a hot-melt type or a solvent type. And foreskin the plate-like material A, preferably with a crease,
It is preferable to obtain the sheet-like material by partially bonding the sheet-like materials to cover the entire surface or multiple surfaces of the plate-like material. The ceiling material thus obtained has excellent heat insulation properties, good sound absorption properties, and can be used as a ceiling material having a low emissivity. Further, the glossiness is small and the design is excellent.

FIG. 2 shows a sheet-like material B used in the present invention.
1 shows a partial perspective view of an example of the above. In this example, a resin film perforated (not shown) so as to have appropriate air permeability is used as a substrate, and an aluminum layer 2 is provided on one surface of a resin film 1 as a substrate by vapor deposition. Further, using a blue ink containing a blue pigment and a matting material on the surface of the colored layer 3 with an appropriate dot density by gravure printing.
Is provided. Since the coloring layer 3 is provided as many dots by gravure printing, the air permeability of the perforated resin film 1 is not lost. By setting the thickness of the vapor deposition layer as described above, the emissivity can be controlled in a preferable range, and the glossiness can be controlled in the preferable range by the dot density and dot thickness of the printing. The air permeability can be controlled in the above-mentioned preferable range by the opening ratio of a hole (not shown).

FIG. 3 is a partially enlarged plan view of an example of another preferred sheet material B used in the present invention. This example
FIG. 4 is an example in which a suitable basis weight (breathable) glass cloth 4 is used as a substrate, and FIG.
Shown in The glass cloth 4 is formed by weaving a large number of glass fibers 5 as warp yarns and weft yarns, respectively, and by setting the basis weight to an appropriate value, preferable air permeability is secured. A resin layer 6 made of an acrylic resin or the like is provided on the surface of the glass fiber 5 as a vapor deposition base layer, and a colored layer 8 similar to that shown in FIG. 2 is formed on the metal vapor deposition layer 7 by gravure printing. In this case, the deposition underlayer 6
Since the vapor deposition layer 7 is formed on the surface of the glass fiber 5 constituting the glass cloth 4, the air permeability of the obtained sheet material B is not lost. The functions of the vapor deposition layer 7 and the coloring layer 8 are the same as those in FIG. 2 and FIGS.
In 4, the colored layer is preferred in the present invention, but is not essential.

[0031]

Next, the present invention will be described more specifically with reference to examples and comparative examples. Example 1 A glass cloth was used as a base material for a sheet material,
This glass cloth (manufactured by Asahi Fiber Glass Co., Ltd.,
5 g / m ² ) on one side, an acrylic resin emulsion was applied at 3% by mass of the mass of the glass cloth and dried,
Aluminum deposition processing (thickness: about 600 mm) was performed. When the emissivity (ε) of this sheet material was measured by the method of JIS Z 1432, a low value of ε = 0.4 was obtained. JIS Z at this time
The glossiness due to the 60-degree specular glossiness of the 8741 specular glossiness measuring method was as small as 4.1, and the design was excellent. This sheet-shaped material is subjected to thermal conductivity of 0.035 W / mK (at 25 ° C.),
One surface of glass wool having a density of 80 kg / m ³ and a thickness of 25 mm was integrated with a chloroprene-based hot melt adhesive to obtain a ceiling material of the present invention.

Example 2 In the same manner as in Example 1, a substrate glass cloth treated with an acrylic silane coupling agent (Asahi Fiberglass Co., Ltd .;
m ² ), a copper (75%)-nickel (25%) alloy was subjected to a sputtering process (film thickness: about 800 °) on one side. When the emissivity (ε) of this sheet material was measured, ε = 0.50 was obtained. However, since the sheet-like material became dark gray, as a result of applying a blue acrylic resin-based ink mixed with aluminum powder by gravure printing, the sheet-like material became bright blue and the emissivity was ε = 0.57. Since the surface of the sheet-like material was in a matte state, it was in a state of low gloss even if it was processed to reduce the emissivity. Further, the glossiness measured by the specular glossiness at 60 ° in the method for measuring the specular glossiness was 1.5, and the design was excellent. This sheet material was adhered to the glass wool used in Example 1 using the same adhesive as in Example 1 to obtain a ceiling material of the present invention.

Example 3 A glass cloth (available from Asahi Fiberglass Co., 140 g / m ² ) was used as a base material of a sheet-like material, and an organic solvent was made to contain vinyl chloride acetate-acrylic resin, aluminum powder and a blue pigment. 8g / m ² by gravure printing
Applied. When the emissivity of the sheet material was measured, it was ε = 0.56, which was blue and less glossy. Since the surface of the sheet-like material was in a matte state, it was in a state of low gloss even if it was processed to reduce the emissivity. At this time, the glossiness due to 60 ° specular glossiness of the JIS Z 8741 specular glossiness measuring method was 3.2, which was excellent in design. The sheet material was adhered to the glass wool used in Example 1 using the same adhesive as in Example 1 to obtain a ceiling material of the present invention.

Example 4 A glass cloth (available from Asahi Fiberglass Co., 80 g / m ² ) was used as a base material of the sheet-like material, and a 20 μm-thick metal material for coating the base material was used for the glossy and matte surfaces. The above-mentioned base material is stuck on the glossy side of the aluminum foil using the aluminum foil which has, and the acrylic resin type blue paint which mixed the matting agent with the aluminum side of the aluminum-glass cloth by gravure printing is 3.5 g / m ^2. This was applied to form a blue sheet material. Since the surface of the sheet-like material was in a matte state, it was in a state of low gloss even if it was processed to reduce the emissivity. A hole having a diameter of 1.5 mm and a permeability of 12 (opening ratio: 4%) was opened to improve the permeability. As a result, ε = 0.57, which was blue and less glossy. At this time, JIS Z 8741 Specular gloss measurement method 60
The glossiness due to the degree of specular gloss was 1.1, which was small and excellent in design. This sheet base material was attached to the glass wool used in Example 1 using the same adhesive as in Example 1 to obtain a ceiling material of the present invention.

Example 5 After a corona discharge treatment was applied to an unplasticized polyvinyl chloride film having a thickness of 50 μm, aluminum was vapor-deposited on the surface (film thickness: 700 °). Further, a blue colorant and a matting agent were applied. As a result, ε = 0.53, which was blue and less glossy. Since the surface of the sheet-like material was in a matte state, it was in a state of low gloss even if it was processed to reduce the emissivity. At this time, the glossiness by 60-degree specular gloss of the JIS Z 8741 specular gloss measurement method was 3.
5 and excellent in design. This sheet substrate is
A glass wool density of 80 kg / m ³ and a thickness of 25 mm were adhered to a plate-like material using the same adhesive as in Example 1 to obtain a ceiling material of the present invention.

COMPARATIVE EXAMPLE 1 A sheet was obtained by depositing aluminum on a polyethylene film having a thickness of 50 μm to a thickness of 400 °. Although the obtained sheet had an emissivity of 0.19 and a low emissivity and obtained a good result, the glossiness measured by the 60-degree specular gloss of the JIS Z 8741 specular gloss measurement method at this time was 150, which was a design property. Was inferior.

Comparative Example 2 Using a sheet material made of a white vinyl chloride sheet having an emissivity of 0.92 and a thickness of 100 μm, the same glass wool as in Example 1 was bonded and integrated with a styrene-butadiene adhesive. did. The sheet material had a high emissivity and could not obtain satisfactory emissivity. JIS Z at this time
The glossiness due to 60 ° specular gloss of the 8741 specular gloss measurement method was 2.3, which was small and excellent in design. This sheet base material was adhered to a plate-like material having a glass wool density of 48 kg / m ³ and a thickness of 25 mm using the same adhesive as in Example 1 to obtain a ceiling material.

Comparative Example 3 The glossy surface of the aluminum foil having a thickness of 20 μm used in Example 4 as a metal material was applied to the same glass cloth as that used in Example 4 as a base material with an acrylic adhesive at 20 g / m ² . Thus, a sheet-like material was prepared by bonding. The emissivity measured from the glass cloth surface of this sheet material was 0.91. At this time, the glossiness due to the 60-degree specular glossiness measured by the JIS Z 8741 specular glossiness measurement method was 18 which was small and excellent in design. The base material for this sheet is made of glass wool having a density of 48 kg / m.
^3. Affixed to a plate having a thickness of 25 mm using the same adhesive as in Example 1 to obtain a ceiling material.

Comparative Example 4 A glass cloth was used as a base material for a sheet material.
This glass cloth (manufactured by Asahi Fiber Glass Co., Ltd.,
On one side of 5 g / m ² ), an acrylic resin emulsion was applied at 3% by mass of the mass of the glass cloth and dried. The emissivity (ε) of this sheet material was measured by the method of JIS Z 1432, and it was ε = 0.93. JIS Z at this time
The gloss by the 60-degree specular gloss of the 8741 specular gloss measurement method was as large as 6.2. This sheet-shaped material was subjected to a heat conductivity of 0.035 W / mK (at 25 ° C.) and a density of 80 kg / m.
^{Using a} chloroprene-based hot melt adhesive on one surface of the glass wool of No. ³ , a ceiling material was obtained.

Comparative Example 5 Thermal conductivity of 0.25 W / mK (at 25 ° C.) and thickness of 5 mm
The sheet-like material used in Example 1 was bonded and integrated to a plate-like material made of FRP through a chloroprene-based adhesive.
Since the obtained plate-like material has inferior heat insulation performance to 1/30 of that of Example 1, a large amount of heat penetrates from the roof exposed to the solar radiation, and the inside of the room is expected to be high in temperature.

The above Examples and Comparative Examples are summarized in Table 1 below. Although some of the descriptions in the table are abbreviated, the contents are as described in the above Examples and Comparative Examples. Also, the unit of each physical property is the same as described in the above Examples and Comparative Examples. GW = glass wool, GC = glass cloth.

[0042]

[Table 1]

[0043]

[Table 2]

[0044]

As described above, according to the present invention,
By installing a ceiling material in which a low-emissivity sheet-like material is attached to a plate-like material on a building with a high ceiling, heat transfer due to radiant heat from the ceiling in summer is reduced, and cooling equipment is downsized. And cooling operation costs can be reduced. Furthermore, there is an effect that a low-emissivity ceiling material excellent in sound absorption and heat insulation can be provided by bonding with a material excellent in sound absorption and heat insulation such as glass wool.

The sheet material used in the present invention maintains a low gloss state even after being processed to reduce the emissivity because the surface of the base material is matte. In addition, it has air permeability that does not impair the sound absorption of glass wool or rock wool. By bonding these materials to a plate-like plate, a low-emissivity insulated ceiling material can be obtained. In addition, by bonding with a plate-like material having excellent sound absorbing properties such as glass wool or rock wool, a light-weighted sound-absorbing heat-insulating ceiling material having a low-emissivity and low-gloss finish surface can be provided.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a ceiling plate according to the present invention.

FIG. 2 is a perspective view of a part of a sheet-like material used for a ceiling plate of the present invention.

FIG. 3 is a plan view of a part of another sheet-like material used for the ceiling plate of the present invention.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 3;

[Explanation of symbols]

 A: Plate-like material B: Sheet-like material C: Adhesive layer 1: Resin film 2, 7: Metallized layer 3, 8: Colored layer 4: Glass cloth 5: Glass fiber 6: Vaporized base layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DD01 DF04 FA14 GA06 GA12 GA23 GA24 GA27 GA28 GA42 GA87 HA32 HA33 HB01 HB02 HB03 HB04 HB05 HB08 HC01 HC06 HC07 HC11 HD02 HD03 HD09 HD11 JA22 JA29 4F100 AA00A AB01A AB04A AB00 AG10 AG BA02 CB03 DG01A DG06 DG11 DG15 GB08 JA13A JD02A JH01 JJ00A JJ01B JJ02 JN21A YY00A YY00B

Claims (5)

[Claims] 1. The emissivity measured by JIS A 1432 (simple emissivity measurement method using an infrared radiation thermometer) is 0.3 to
The sheet-like material of 0.6 has a thermal conductivity of 0.2 W / mK
(At25 ° C) A ceiling material provided on at least one surface of a plate-like material having a temperature of not more than (at 25 ° C). 2. The ceiling material according to claim 1, wherein the sheet-like material has a glossiness of not more than 20 measured by a method of JIS Z 8741 (specular glossiness measuring method) (specular glossiness at 60 degrees). 3. The air permeability of the sheet material measured by the air permeability A method of JIS L 1096 (General woven fabric test method) is as follows:
The ceiling material according to claim 1, wherein the ceiling material is 1.0 to 300 cc / cm ² · sec. 4. The plate-like material has a density of 8 to 500 kg / m ^3.
The ceiling material according to any one of claims 1 to 3, which is an inorganic fiber. 5. The ceiling material according to claim 1, wherein a surface of said sheet material is coated with a metal material selected from Monel and stainless steel.