JP2000326431A - Laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively improve a heat insulation effect by using for a mounting material, a building material, fittings, a cabinet or the like by providing many independent spaces in a flat surface state between a laminated sheet and a flexible sheet. SOLUTION: The laminated sheet 1 is obtained by laminating a lattice-like protrusion A side of a flexible sheet 21 having lattice-like protrusions A having many recesses B independently formed on one surface side and one surface of a flexible sheet 22 having smooth both surfaces by using an adhering means 30 under a reduced pressure. The many recesses B made of pressure reduced spaces are incorporated to obtain the laminated sheet having an excellent heat insulation function. As the means 30, for example, an adhesive for a dry lamination such as one-liquid moisture curable urethane adhesive, two-liquid reaction curable urethane adhesive or the like, a thermoplastic resin for a sand lamination such as a polyethylene, a polypropylene or the like is used. As the flexible sheet, a polymer sheet having an inorganic material vapor deposited layer, a metal foil layer or a polyvinylidene chloride or the other is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet having a heat insulating effect, and more particularly, to a laminated sheet having a large number of spaces at atmospheric pressure or reduced pressure to exhibit a heat insulating effect.

[0002]

2. Description of the Related Art Conventionally, building materials used for houses and the like are:
Considering the cost-effectiveness of heat, if anything,
The thing of the interruption performance with which cost was emphasized was used. However, in recent years, high-performance building materials that actively incorporate a heat insulating function, such as improving the airtightness of a living space, have been used for the purpose of improving the living environment and reducing energy consumption.

[0003] Such high-performance building materials include, for example, window glass having multiple openings in windows and the like. However, any of the high-performance building materials becomes large-scale as compared with conventional building materials in consideration of cost-effectiveness, resulting in high costs.

[0004] Therefore, in order to obtain a living space having a better heat insulating effect than the conventional cost-effective building materials at low cost without using an expensive high-functional building material incorporating the above-mentioned heat insulating function, the heat insulating material is used. Floor materials, wall materials,
Various building materials such as ceiling materials are widely used. Typical examples of these building materials include floor materials and wall materials using a foam material as a constituent material. Certainly, building materials using a foam material as a constituent material are superior in heat insulation effect than conventional building materials in consideration of cost-effectiveness, but expensive high-performance building materials, such as the above-described multiple It was extremely inferior to a living space using a window glass with a structure.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and has as its object to provide a relatively inexpensive construction of flooring, wall material, ceiling material and the like. It is a laminated sheet excellent in heat insulation effect that can be used as a material or a building material, or a constituent material of a fitting, a cabinet, and the like. Also, by imparting transparency to the laminated sheet of the present invention, a window can be formed as a single item. An object of the present invention is to provide a laminated sheet that can be provided with heat insulation by attaching it to glass or the like.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, the laminated sheet according to the first aspect of the present invention has a structure in which two flexible sheets are interposed. The laminated sheet laminated by using the bonding means has a large number of independent spaces arranged in a plane between the flexible sheets of the laminated sheet. With this configuration, a laminated sheet having a heat insulating effect can be obtained.

The laminated sheet according to the second aspect of the present invention is a laminated sheet obtained by laminating adjacent flexible sheets of three or more flexible sheets by using an adhesive means, wherein each of the laminated sheets is It is characterized by having a large number of independent spaces arranged in a plane between flexible sheets. With this configuration, it is possible to obtain a laminated sheet having a further excellent heat insulating effect.

[0008] The invention described in claim 3 is based on claim 1,
2. In the laminated sheet according to any one of (2), a space surrounded by a concave portion or a convex portion formed on one surface of the flexible sheet opposed to the plurality of independent spaces arranged in the plane, or A large number of independent spaces arranged in a plane using an adhesive as the bonding means, and a space formed by a non-coated portion surrounded by a coated portion of the adhesive. is there. With this configuration, an independent space can be easily formed.

According to a fourth aspect of the present invention, in the laminated sheet according to the second aspect, the plurality of independent spaces arranged in a plane are formed on any one surface of the opposed flexible sheet. The space surrounded by the concave portion or the convex portion, or the large number of independent spaces arranged in a plane using an adhesive as the bonding means, is formed by a non-coated portion surrounded by a coated portion of the adhesive. In any of the following spaces. With this configuration, the degree of freedom in manufacturing the laminated sheet of the present invention is increased.

[0010] The invention according to claim 5 provides the invention according to claims 1 to 5.
5. The laminated sheet according to any one of the items 4, wherein the plurality of independent spaces arranged in a plane are decompressed spaces. With this configuration, a laminated sheet having an extremely excellent heat insulating effect can be obtained. In addition, by making the independent space a configuration according to any one of claims 3 and 4, even if the independent space is a decompression space, a space where adjacent flexible sheets do not adhere to each other in the independent space. It can be.

According to a sixth aspect of the present invention, in the laminated sheet according to the fifth aspect, the flexible sheet is a sheet made of a polymer having an inorganic vapor deposition layer, a metal foil layer, or a polyvinylidene chloride layer, or , Polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, and a sheet made of polyvinylidene chloride. With this configuration, the decompression space can be maintained for a long time.

The invention according to claim 7 is the first invention.
6. The laminated sheet according to any one of the above items 6, wherein at least one exposed surface is provided with an attaching means. With such a configuration, for example, a heat insulating effect can be obtained by attaching the transparent laminated sheet of the present invention to an existing window glass or the like.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, the flexible sheet used in the present invention is not particularly limited. Examples thereof include polyolefins such as polyethylene, polypropylene, polybutene, polypentene, and polymethylpentene, polyvinyl chloride, polyvinyl acetate, and polyvinyl alcohol. Polyvinyls, polyvinylidenes such as polyvinylidene chloride, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyesters such as polybutylene naphthalate, polymethyl methacrylate, polymethacrylates such as polyethyl methacrylate, Polyacrylates such as polybutyl acrylate, polyamides such as nylon 6 and nylon 66, celluloses such as cellulose triacetate and cellophane, polysterenes, polycarbonates, polyamides Sheets (including synthetic paper) made of polymers such as copolymers of polyurethanes, polyurethanes, or copolymers of two or more of these monomers, or sheets obtained by appropriately coating polyvinylidene chloride on sheets made of the above polymers Or aluminum or silicon oxide,
Deposition layers of inorganic substances such as aluminum oxide, indium oxide, tin oxide, zirconium oxide, aluminum, iron, copper,
Examples of the sheet on which a metal foil layer of tin or the like is formed include a sheet having a gas barrier property, or a single body or a laminate of two or more thereof. Further, the polymer sheet (including synthetic paper) may be an unstretched sheet or a stretched sheet stretched in a uniaxial or biaxial direction, provided with a concave portion or a convex portion on one surface. Flexible sheets are unstretched sheets. Also, a concave portion on one surface of the flexible sheet,
Or, as a method of providing a convex portion, for example, using a well-known sheet, or a rotary embossing machine, when the flexible sheet is at a temperature at which embossing can be performed, and after embossing with an embossing plate, It can be formed by cooling. The shape of the concave and convex may be any shape as long as each concave portion is surrounded by a convex portion without forming a large number of concave portions, and is configured to form an independent concave portion. For example, a triangle,
Various squares such as a square, a pentagon, and a hexagon, or a circle, an ellipse, and the like.

The laminated sheet of the present invention is a flexible sheet made of a polymer having an inorganic vapor-deposited layer, a metal foil layer, or a polyvinylidene chloride layer, or a polyvinyl alcohol, an ethylene-vinyl alcohol copolymer. The most preferred form is a sheet having a gas barrier property composed of a single body or a laminate comprising at least one sheet of polyvinylidene chloride. As a reason for this, the laminated sheet of the present invention is more preferably configured such that a large number of independent spaces are decompressed spaces.
This is because a suitable heat insulating effect can be obtained, and as the flexible sheet has a better gas barrier property against oxygen gas, nitrogen gas, and water vapor, the reduced pressure space can be maintained for a long time. . Regarding the gas barrier properties of the flexible sheet, the type and thickness of the sheet to be used, the configuration of the laminate, or the like may be considered depending on the required quality (such as the period during which the decompressed space is maintained).

As one of the sticking means provided on at least one surface of the laminated sheet of the present invention, for example, a pressure-sensitive adhesive layer made of a pressure-sensitive adhesive is provided. . The pressure-sensitive adhesive used for this purpose is a gravure printing method, a roll coating method, or the like, which can be arbitrarily selected from well-known pressure-sensitive adhesives conventionally used, such as natural rubber latex or synthetic rubber latex. It can be formed by coating using a well-known coating method described above, and additives such as a thickener, a dispersant, an antifoaming agent, an antistatic agent and a preservative can be added as necessary. It is appropriate that the amount of the pressure-sensitive adhesive layer applied when dry is approximately 20 g / m ² . When a pressure-sensitive adhesive layer is provided as a sticking means, naturally, a well-known separation paper having a release layer for protecting the pressure-sensitive adhesive layer is used on the pressure-sensitive adhesive layer until the laminated sheet is used. Have been.

Further, as another attaching means provided on at least one exposed surface of the laminated sheet of the present invention, for example,
Flame-retardant paper for wallpaper (sheet mainly composed of pulp, sheet treated with a flame retardant such as guanidine sulfamate, guanidine phosphate) on the exposed surface of the laminated sheet provided with the attaching means,
Aluminum hydroxide paper, inorganic paper, ordinary paper, such as the backing paper for wallpaper, etc. are bonded by any bonding means, and a rewet adhesive layer made of rewet glue or the like is formed on the surface of the backing paper. What is provided is another means. In this case, the pressure-sensitive adhesive layer may be provided on the backing paper in the same manner as described above.

Next, the present invention will be described in more detail with reference to the drawings and the like. FIG. 1 is a layer configuration diagram showing a first embodiment of a laminated sheet according to the present invention, FIG. 2 is a layer configuration diagram showing a second embodiment of the laminated sheet according to the present invention, and FIG. FIG. 4 is a perspective view showing another embodiment of the flexible sheet having a concavo-convex pattern, and FIG. 4 is a perspective view showing another embodiment of the flexible sheet.
1, 22, 23 and 24 are flexible sheets, 30 is an adhesive means, 31 is a grid-like adhesive layer, A is a grid-like convex portion, B is a concave portion, and C is a space.

First, FIG. 1 is a layer configuration diagram showing a first embodiment of the laminated sheet of the present invention. As shown in FIG. 3, the laminated sheet 1 of the present invention has a concave portion B on one surface side. A flexible sheet 21 having a plurality of grid-shaped convex portions A formed so as to be formed independently and having a smooth surface on both sides of the grid-shaped convex portions A and both sides.
Is bonded under reduced pressure using the bonding means 30. As shown in FIG. 1, the flexible sheet 21 and the flexible sheet 22 are formed by bonding the lattice-shaped protrusions A of the flexible sheet 21 and the flexible sheet 22 via the bonding means 30. The concave portion B surrounded by the lattice-shaped convex portions A of the flexible sheet 21 forms a reduced-pressure space, and has a large number of concave portions B formed of the reduced-pressure space, thereby forming a laminated sheet having an excellent heat insulating function. As the bonding means 30 in this case, for example, a well-known dry lamination adhesive such as a one-component moisture-curable urethane adhesive or a two-component reaction-curable urethane adhesive, or a well-known sand lamination such as polyethylene or polypropylene. Examples thereof include a thermoplastic resin. If necessary, the surfaces of the flexible sheets 21 and 22 that are in contact with the bonding means 30 may be subjected to a known treatment such as corona discharge treatment or anchor coating before the bonding means 30 is used.

FIG. 2 is a layer configuration diagram showing a second embodiment of the laminated sheet of the present invention.
On one surface of the flexible sheet 23 whose both surfaces are smooth, for example,
A well-known dry lamination adhesive such as the above-described one-component moisture-curable urethane adhesive or two-component reaction-curable urethane adhesive is applied in a grid pattern to form a grid-shaped adhesive layer 31, and the grid-shaped adhesive layer is formed. One surface of a flexible sheet 24 having both surfaces smoothed on the agent layer 31 under reduced pressure. As shown in FIG. 2, the laminated sheet 2 thus configured is a flexible sheet.
The space C surrounded by 23 and 24 and the grid-like adhesive layer 31 forms a decompressed space, and by having a large number of spaces C composed of the decompressed space, a laminated sheet having an excellent heat insulating function can be obtained.
Also in the second embodiment, if necessary, similarly to the above, the surfaces of the flexible sheets 23 and 24 that are in contact with the grid-like adhesive layer 31 may be treated by a known process such as corona discharge treatment or anchor coating. Can be performed in advance.

The laminated sheet of the present invention shown in FIGS. 1 and 2 is the simplest and most typical example in which a large number of independent reduced-pressure spaces are provided between two flexible sheets in a plane. The laminated sheet of the present invention is not limited to this, but is composed of, for example, three or more flexible sheets, and each of the flexible sheets adjacent to the flexible sheet The laminated sheet of the present invention includes a member provided with any one of the decompression spaces shown in FIGS. 1 and 2 or a member formed of a laminate instead of a single flexible sheet.

[0021]

Next, the present invention will be described in more detail with reference to the following examples. Example 1 A 50 μm biaxially stretched polyethylene terephthalate film (hereinafter, referred to as a substrate) having a corona discharge treatment on one surface and a 0.1 μm aluminum vapor-deposited layer formed on the other surface as a substrate.
An isocyanate-based anchor coating agent (hereinafter, referred to as an AC agent) is applied to a surface of a vapor-deposited layer of a vapor-deposited PET), subjected to knurling, and provided with a cooling roll having a desired uneven shape on its surface by T-die extrusion. Extrusion coating of the low-density polyethylene hot-melted on the AC agent surface with a machine.
The thickness KA of the base material is 50 μm, and the thickness TA of the extruded coating layer of the low-density polyethylene is 150 μm. A laminate having a large number of rectangular parallelepiped concave portions having a thickness of about 2 mm and a depth F of 100 μm and having the exposed surface subjected to corona discharge treatment was prepared.

The above-prepared laminate was cut into four 30 cm square laminates, and the above-mentioned 50 μm vapor-deposited PET was cut into one 30 cm square vapor-deposited PET. A two-component curable urethane adhesive is applied to the entire surface of the one-side deposited PET so as to be 1 g / m ² when dry,
In a decompression chamber of 20 mmHg, the deposited PET and one of the laminates were pasted together so that the concave side of the laminate faced the adhesive-coated surface to produce a first intermediate. Next, a two-component curable urethane adhesive was applied to the entire surface of the corona discharge treated surface of the primary intermediate so as to be 1 g / m ² when dry, and the adhesive was applied in a reduced pressure chamber of 20 mmHg. One laminated body was bonded to the first intermediate body so that the concave side of the laminated body came to the work surface, and a second intermediate body was produced. Subsequently, this operation was further performed twice to prepare a laminated sheet of the present invention.

Comparative Example 1 A 50 μm biaxially stretched polyethylene terephthalate film (hereinafter, referred to as a base material) having a corona discharge treatment on one surface and a 0.1 μm aluminum vapor-deposited layer formed on the other surface.
An isocyanate-based anchor coating agent (hereinafter, referred to as an AC agent) is applied to the surface of a vapor-deposited layer of vapor-deposited PET), and a T provided with a cooling roll having a substantially mirror-like surface.
A low-density polyethylene hot-melted on the AC agent surface was extruded and applied to a thickness of 150 μm by a die extruder, and a corona discharge treatment was applied to the extruded coated surface to produce a comparative laminate.

The above-prepared comparative laminate was cut to 30 cm
Four comparative laminates each having a square size and one of the above-described 50 μm vapor-deposited PET cut into a 30-cm square vapor-deposited PET were prepared.
A two-part curable urethane adhesive was applied to the entire surface of the single PET film on a vapor-deposited surface so as to be 1 g / m ² when dry, and the above-mentioned comparative example was applied to the adhesive-coated surface under normal pressure. A first comparative intermediate was produced by laminating the deposited PET and one of the comparative laminates such that the polyethylene side of the laminate was facing. Next, a two-component curable urethane adhesive is applied to the entire surface of the corona discharge treated surface of the first comparative intermediate so as to be 1 g / m ² when dry, and is applied to the adhesive-coated surface under normal pressure. One more of the comparative laminates was bonded to the first comparative intermediate so that the polyethylene side of the comparative laminate came, to prepare a second comparative intermediate. Then, do this work for two more
This was repeated to produce a comparative laminated sheet to be compared.

With respect to the laminated sheets of Example 1 and Comparative Example 1 produced as described above, an evaluation test of the heat insulating property was performed by the following test method, and the results are shown in Table 1.

[Table 1] * Thermal insulation evaluation test method: The laminated sheet of Example 1 and Comparative Example 1 was cut into a 10 cm square at the bottom of a cubic water tank with an external dimension of 30 cm on a side made of an aluminum plate having a thickness of 1 mm. After sticking the whole surface firmly to the bottom of the water tank, 18 l (liter) of ice water was poured into the water tank, and the temperature of the bottom of the water tank and the temperature of the bottom of the water tank of Example 1 and Comparative Example 1 were adhered. Each temperature (° C.) when the surface temperature of the laminated sheet was in an equilibrium state was measured, and a temperature difference between the bottom surface temperature of the water tank and the surface temperature of the laminated sheet was obtained. The heat insulation evaluation test was performed in an environment where the room temperature was 25 ° C.

As is clear from Table 1, the laminated sheet of the present invention shown in Example 1 having a large number of independent decompressed spaces exhibits an excellent heat insulating effect as compared with the comparative laminated sheet of Comparative Example 1. I do.

The laminated sheet of the present invention is not limited to the structure shown in this embodiment. For example, an adhesive for bonding two sheets is applied in a lattice form as described above. It can also be produced by laminating under reduced pressure as described above. Although the laminated sheet of the present invention has been described as a sheet having an excellent heat insulating effect, it is a sheet having a large number of decompressed spaces, and has not been measured but can be expected to have an excellent soundproofing effect.

[0029]

As described so far, the laminated sheet of the present invention is inexpensive as compared with high-performance building materials, and is used for building materials such as flooring, wall materials, ceiling materials, building materials, or fittings. It has excellent effects on the heat insulating function that can be used as a constituent material of cabinets and cabinets. Further, by providing the laminated sheet of the present invention with transparency, by providing the laminated sheet to a window glass or the like, the window glass It also has an effect on heat insulation such as.

[Brief description of the drawings]

FIG. 1 is a layer configuration diagram showing a first embodiment of a laminated sheet according to the present invention.

FIG. 2 is a layer configuration diagram showing a second embodiment of the laminated sheet according to the present invention.

FIG. 3 is a perspective view showing one embodiment of a flexible sheet having an uneven pattern.

FIG. 4 is a perspective view showing another embodiment of a flexible sheet having an uneven pattern.

[Explanation of symbols]

 1, 2 laminated sheet 21, 22, 23, 24 flexible sheet 30 bonding means 31 grid adhesive layer A grid convex part B concave part C space

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F100 AA01A AA01B AB01A AB01B AB10 AB33A AB33B AK06 AK16A AK16B AK21A AK21B AK42 AK51G AK69A AK69B BA02 BA11 BA14 BA32 BA33 BA44 CB00 CB02E DCE DCE DCE DCE DCE DCE DCE DCE DCE DCE DCE DCE DCE DCE DCE DCH JK17A JK17B JL11

Claims (7)

[Claims] 1. A laminated sheet obtained by laminating two flexible sheets using an adhesive means, and having a large number of independent spaces arranged in a plane between the flexible sheets of the laminated sheet. The laminated sheet characterized by the above. 2. A laminated sheet obtained by laminating adjacent flexible sheets of three or more flexible sheets by using an adhesive means, wherein the laminated sheets are arranged in a planar manner between the flexible sheets. A laminated sheet having a large number of independent spaces. 3. A space surrounded by a concave portion or a convex portion formed on one surface of the flexible sheet in which a large number of independent spaces arranged in the plane face each other, or arranged in the plane shape. The multiplicity of independent spaces using an adhesive as the bonding means and being a space formed by a non-coated portion surrounded by a coated portion of the adhesive, wherein
3. The laminated sheet according to any one of 2. 4. A space surrounded by a concave portion or a convex portion formed on one surface of the flexible sheet facing a plurality of independent spaces arranged in the plane, or arranged in the plane. 3. The method according to claim 2, wherein the plurality of independent spaces use an adhesive as the bonding means, and are any of spaces formed by a non-coated portion surrounded by a coated portion of the adhesive. Laminated sheet. 5. The laminated sheet according to claim 1, wherein the plurality of independent spaces arranged in a plane are reduced-pressure spaces. 6. The flexible sheet according to claim 1, wherein the flexible sheet comprises a polymer having an inorganic vapor deposition layer, a metal foil layer, or a polyvinylidene chloride layer, or polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, or polyvinylidene chloride. The laminated sheet according to claim 5, wherein the laminated sheet comprises a single body or a laminated body having at least one sheet. 7. The laminated sheet according to claim 1, further comprising a sticking means on at least one exposed surface.