JPH08312880A - Vacuum heat insulating panel and its manufacture - Google Patents

Abstract

PURPOSE: To form a through-hole portion through which wiring, piping and equipment are inserted on a heat insulating core material by fitting a cylindrical edge material in a through-hole formed on a heat insulating base material, and forming the through-hole portion by means of a sealing part which is prepared by welding a gas barrier lapping member to both ends of the edge member. CONSTITUTION: A heat insulating core material has a heat insulating base material 1a formed with a through-hole 11a and a cylindrical edge material 12a. The edge material 12a is inserted into the through-hole 11a formed on the heat insulating base material 1a with its both ends being substantially flush with both surfaces of the heat insulating base member 1a. As for the heat insulating core material, both ends 2a of the edge material 12a are welded to a gas barrier lapping member, showing function for forming a sealing part. A through-hole portion of a vacuum heat insulating panel is formed by the sealing part and the through-hole as a hollow portion of the edge material 12a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum insulation panel and a method for manufacturing the same. More specifically, the present invention relates to a vacuum heat insulating panel having a through hole that can be suitably used as a heat insulating material for a heat insulating box such as a refrigerator or a cool box, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, there has been known a vacuum heat insulating panel in which an inorganic fine powder such as silica or calcium silicate is used as a heat insulating material, and this is sealed in a bag made of a gas barrier film under reduced pressure. This fine powder enclosed vacuum insulation panel is
Since fine powder is used as the heat insulating material, the end part is not well-defined and dust is severe when it is discarded, so it cannot be said to be satisfactory. Further, as an improvement of the drawbacks of the fine powder-filled type vacuum heat insulation panel, there is known a molded body-filled type vacuum heat insulation panel using a foamed polyurethane molded body, a calcium silicate molded body or the like as a heat insulating material.

In such a vacuum heat insulating panel, in addition to the low thermal conductivity of the heat insulating material itself enclosed, the depressurized state of the inside greatly suppresses convective heat transfer inside the heat insulating panel. It is characterized in that it exhibits excellent heat insulation performance due to a synergistic effect. Conventionally, a flat plate-shaped object has been used by arranging it in a space formed by an inner wall and an outer wall of a refrigerator, a cool box or the like. However, although this type of vacuum heat insulation panel exhibits excellent heat insulation performance due to the above synergistic effect, it cannot be perforated as a post-process, and therefore has many restrictions in use.

Taking a refrigerator as an example, an electric wire, a refrigerant gas pipe, a temperature adjusting device, etc. are provided through the heat insulating wall. It is conceivable to use a conventional heat insulating plate (for example, foamed polyurethane molded body or calcium silicate molded body) that can be punched in the area where such wiring, piping, equipment, etc. are provided. Insulation performance is inferior in comparison, and this difference in insulation performance cannot be ignored considering the period of use in units of years, and its economic loss becomes enormous. Also, by combining a large-area vacuum heat insulation panel and a small area vacuum heat insulation panel, use a small area vacuum heat insulation panel at the site where wiring, piping, equipment, etc. are provided.
Although it may be possible to dispose the device away from the equipment, a gap is formed on the combined joint surface, and the heat insulation performance is deteriorated.

To solve this problem, a vacuum heat insulating panel having a through hole for passing wiring, piping, equipment, etc. in its surface is used.
The problem can be solved by arranging the pipes, equipment, etc., and the door hinge fixing member, etc. so as to match the positions where they are provided. However, a vacuum heat insulating panel having a through hole that can be used for this purpose and a method for manufacturing a vacuum heat insulating panel having such a structure have not been developed yet, and the development thereof has been strongly desired.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional state of the art, the present invention is a vacuum having a through hole portion through which wiring, piping, equipment, etc. can be passed, particularly a through hole portion protected by an edge member. It is an object of the present invention to provide a heat insulating panel and a manufacturing method thereof.

[0007]

In the vacuum heat insulation panel according to the present invention, however, the heat insulation core material is enclosed in a bag made of a gas barrier packaging material in a vacuum-exhausted state. In the above heat insulating core material, a tubular edge member is fitted in a through hole formed in a heat insulating base material, and a seal portion in which a gas barrier packaging material is fused to both end surfaces of the edge member. Therefore, a means for forming a vacuum heat insulating panel having a through hole is formed.

Further, in the method for manufacturing a vacuum heat insulating panel according to the present invention, in the method for manufacturing a vacuum heat insulating panel, the heat insulating core material is enclosed in a bag made of a gas barrier packaging material while being evacuated. , A through hole is formed in the heat insulating base material and a tubular edge member is fitted into the through hole to form a heat insulating core material, and the heat insulating core material is introduced into the bag from the opening of the bag made of the gas barrier packaging material. And the inside of the bag is evacuated from the opening of the bag to maintain a desired degree of vacuum, and a seal portion (A) in which the gas barrier packaging material is fused to both end surfaces of the edge member, and the opening of the bag. The manufacturing method of forming the seal part (B) in which the gas barrier packaging materials of the parts are fused to each other is taken.

The vacuum heat insulating panel and the method for manufacturing the vacuum heat insulating panel according to the present invention will be described below with reference to FIG.
Although detailed description will be given with reference to FIGS. 6A to 6C, the present invention is not limited to the vacuum heat insulating panel and the manufacturing method illustrated here.

First, the vacuum heat insulating panel according to the present invention will be described. The vacuum heat insulating panel of the present invention has a basic structure in which a heat insulating core material is enclosed in a bag made of a gas barrier packaging material in a vacuum-exhausted state.

[Heat Insulating Core Material] As the heat insulating core material, there is used a heat insulating core material having a specific structure in which a through hole is preliminarily formed in a heat insulating base material, and a cylindrical edge member is fitted in the through hole. ing.
Specific examples thereof are shown in FIGS. 3 (a) and 3 (b). FIG.
(A) and FIG. 3 (b), (3a), (3b)
Is a heat insulating core material, (12a) and (12b) are edge members, and (13
Reference characters a) and (13b) respectively denote through holes that are hollow portions of the edge member.

The heat insulating core material (3a) illustrated in FIG. 3 (a) is
A heat insulating substrate (1a) having a through hole (11a) as shown in FIG. 1 (a) and a cylindrical edge member (12a) shown in FIG. 2 (a) are used. 1a) is easily formed by fitting the edge member (12a) into the through hole (11a) formed so that both end surfaces thereof are substantially flush with the front and back surfaces of the heat insulating base material (1a). can do.

In the heat insulating core material (3a) illustrated here, both end surfaces (102a) of the edge member (12a) have a function of being fused with the gas barrier packaging material to form a seal portion. The through hole (13a), which is the hollow portion of the seal portion and the edge member (12a), forms the through hole of the obtained vacuum heat insulating panel.

The heat-insulating core material (3a) illustrated here is for obtaining a vacuum heat-insulating panel having a single through-hole, but when obtaining a vacuum heat-insulating panel having a plurality of through-holes. A plurality of through holes (11a) are formed in the heat insulating base material (1a), and the edge member (12a) is fitted into each through hole in the above manner.

The heat insulating core material (3b) illustrated in FIG. 3 (b) is
A tubular edge member (12b) having a heat insulating substrate (1b) having a through hole (11b) as shown in FIG. 1 (b) and a flange portion (103) as shown in FIG. 2 (b). The two end portions of the flange member (103) of the edge member (12b) are substantially flush with the front surface and the back surface of the heat insulating substrate (1b) in the through hole (11b) of the heat insulating substrate (1b). It can be easily created by fitting it so that In this case, the heat insulating base material (1b) is provided with a through hole (11b) provided with flange fitting portions (111b) on both front and back surfaces, and one edge member is provided from the surface side of the through hole (11b). The opposite side of the flange portion (103) may be inserted first, other edge members may be similarly inserted from the back surface, and the tips of both may be fixed by adhesion or the like.

In the heat insulating core material (3b) exemplified here, both flange surfaces (102b) of the edge member (12b) are fused with the gas barrier packaging material to form a seal portion, and this seal is formed. The through hole (13b), which is a hollow portion of the portion and the edge member (12b), forms the through hole of the vacuum insulation panel obtained. This insulation core (3
When b) is used, since the seal portion is formed by the flange surface (102b) which can take a large area, the seal portion can be easily formed and the formed seal portion is more durable, which is preferable.

In the heat insulating core material shown in FIGS. 3 (a) and 3 (b), a through hole is formed in a direction perpendicular to the surface of the heat insulating base material, and an edge member is fitted into this through hole. However, the heat insulating core material used in the present invention may be one in which a through hole is formed in an oblique direction with respect to the surface of the heat insulating base material, and an edge member is fitted into this through hole, and in this case, a cylindrical shape is used. When the edge member is fitted, the end surface of the edge member has an elliptical shape.

Insulating base materials (1a, 1) used for the above insulating core material.
b) is not particularly limited as long as it has an outer shape that can be stored in a bag made of a gas barrier packaging material described later, and a molded body made of various conventionally known heat insulating materials is arbitrarily used. be able to. Typical examples thereof include porous inorganic moldings such as calcium silicate moldings and foamed resin moldings such as polyurethane foam moldings.

When the above-mentioned porous inorganic molded body or foamed resin molded body is used as the heat insulating base material, the communicating porous space formed therein can be easily evacuated to form a heat insulating core material. In addition to its own low thermal conductivity, the presence of a vacuum-exhausted space significantly suppresses convective heat transfer, resulting in excellent heat insulation performance as a whole.

Among the above heat insulating base materials, calcium silicate containing 50% by weight or more of calcium silicate from the viewpoint of having low thermal conductivity, light weight, mechanical strength, moldability, durability, reusability and the like. Molded bodies made of the system composition are preferable, and calcium silicate molded bodies are most preferable. Various grades of calcium silicate compacts have been developed for heat insulating materials, have a low apparent density and excellent compressive strength, and are suitable as heat insulating core materials.

The above-mentioned calcium silicate compact is usually obtained by dispersing a siliceous raw material and a calcareous raw material in water and carrying out a hydrothermal synthesis reaction under heating to obtain an aqueous slurry of calcium silicate hydrate. It is produced by a method of dehydrating the obtained aqueous slurry, followed by drying or steam curing, but the calcium silicate compact that can be used is not limited to the one obtained by this method.

In the above method for producing a calcium silicate compact, the siliceous raw material may be amorphous or crystalline, and specific examples of the siliceous raw material include diatomaceous earth,
Examples thereof include natural products such as silica stone and quartz, silicon dust, and industrial by-products such as silica obtained by the reaction of hydrosilicofluoric acid by-produced in the wet phosphoric acid production process and aluminum hydroxide. In addition, specific examples of calcareous raw materials include quick lime, slaked lime, and slag of slag, and these are often used by preparing lime milk containing bulky lime particles.
In the hydrothermal synthesis reaction, the amount of water is usually 15 times by weight or more relative to the solid content (silicic material and calcareous material), and the reaction time is 1 at a saturated vapor pressure of 10 kg / cm ² or more. It is carried out under the condition of ˜5 hours, and this hydrothermal synthesis reaction gives an aqueous slurry of calcium silicate hydrate.

Dehydration molding of the aqueous slurry is usually carried out by a dehydration molding machine utilizing a filter press or the like, and molded articles having various shapes having flat plates or curved portions can be obtained depending on the shape of the dehydration section. The desired calcium silicate compact can be obtained by drying the dehydrated compact directly or after steam curing. Drying is usually performed at a temperature of 150 to 200 ° C. for 5 to 30 hours, and steam curing before drying is usually performed under the same conditions as in the hydrothermal synthesis reaction.

The calcium silicate compact produced by the above method has a structure in which needle crystals of calcium silicate are three-dimensionally entangled, and has a high specific strength and is very suitable as a heat insulating core material. Specifically, the apparent density is 0.02 to
Are obtained as a 0.09 g / cm ^3, these compression strength 2 kg / cm ² or more, usually 2~6kg / cm ^2. The needle crystals are mainly composed of tobermorite, zonotorite or a mixture thereof. The crystal seed is adjusted by CaO / S in the hydrothermal synthesis reaction.
Although made by the molar ratio of iO _2, typically this molar ratio is in the range of 0.8 to 1.2, Zonotoraito are found to predominantly generated according molar ratio increases.

As the foamed polyurethane molded body used as the heat insulating base material, a usual foamed molded body conventionally used as a heat insulating material can be used. An example of the outer dimensions of the heat insulating core material is 400 mm in length and width and 10 mm in thickness. However, the vertical and horizontal lengths are appropriately changed in a wide range of 150 to 1000 mm depending on the use, but the thickness is usually 10 to 10 mm.
The range is 0 mm.

As the edge members (12a, 12b),
It has a hollow cylindrical outer shape, and a gas barrier packaging material can be fused to both end faces of the cylinder, and its length is longer than that of the heat insulating base material (1a, 1
There is no particular limitation as long as it is almost the same as the thickness of b). In the edge member (12b) shown in FIG. 2 (b), the length when the two are abutted, that is, both flange surfaces (10
The distance between 2b) is the length of the edge member.

The edge member of the type shown in FIG. 1 (a) may have a circular cross section or a polygonal shape such as a quadrangle or a hexagon. In the edge member of the type shown in FIG. 1 (b), the flange portion and the tubular portion both have a circular cross section, and the flange portion and the tubular portion both have a circular shape.
Similar to the edge member of the type shown in (a), the cross section may be a polygon such as a quadrangle or a hexagon. Further, the length as described above, the dimension of the hollow portion of the edge member having a cross-sectional shape, regardless of the thickness of the heat insulating core material, the wiring to be penetrated using here,
It can be appropriately determined according to the size and number of pipes, equipment, etc., but usually the diameter or the length of one side is 1 to 100.
It is about mm.

The edge members (12a, 12b) may be made of a thermoplastic resin, various kinds of rubber, metal, glass, ceramics, etc., but the tubular portion thereof has a gas barrier property. ) End faces and edge members (1
It is important that both flange surfaces of 2b) can be fused with a gas barrier packaging material to form a seal portion, and that heat conduction is small as a whole. In consideration of such desired characteristics, an integrally molded product made of a heat-fusible material such as a thermoplastic resin is preferable. Edge member (12
As a, 12b), those made of a material such as metal, glass, or ceramic which does not have heat-melting property itself or gas barrier property can be used, but at this time, the surface thereof is made of thermoplastic resin or the like. Surface treatment such as coating with a material having heat fusion property and gas barrier property is required.

[Bag Made of Gas Barrier Packing Material] In the vacuum heat insulating panel of the present invention, the heat insulating core material is enclosed in a bag made of a gas barrier packing material in a vacuumed state. When manufacturing this vacuum heat insulating panel, a bag that is made of a gas barrier packaging material and that can accommodate the flat insulating core material and has an opening for vacuum exhaust is usually used. As shown in FIG. In FIG. 4, (2) is a bag made of a gas barrier packaging material, and (2)
1) shows the opening of the bag (2), and (22) and (23) show the sealing part of the bag (2).

The bag (2) used in the present invention will be described by taking the case of using the heat insulating core (3a) as an example.
It is a container that houses the heat insulating core material (3a), and after the inside is evacuated, the inside of the bag is in a vacuum or highly depressurized state due to the gas impermeability of the gas barrier packaging material that constitutes the container. It serves the function of maintaining.
Therefore, the heat insulating core material (3
It has a portion capable of forming a seal portion B (25) (see FIG. 5 described later) for sealing the heat insulating core material after accommodating a) and evacuating the inside of the bag.

As the gas barrier packaging material constituting the bag (2), a metal foil made of aluminum or the like, a base film made of plastic or a metal such as aluminum or the like is used to maintain the inside of the bag in a vacuum or highly depressurized state. A vapor-deposited film obtained by vapor-depositing ceramics such as silicon oxide, and a single-layer film or a multi-layer film made of plastic, either alone or in combination, are used.

Among these gas barrier packaging materials,
In addition to being excellent in gas barrier properties, it is also excellent in flexibility and can be adhered well when the heat insulating core material is enclosed in the bag in a state of being evacuated, and therefore aluminum foil is deposited on the vapor deposition film or plastic film. Most preferred are laminated laminated films.

As the base film of the vapor deposition film or the base film to be laminated with the aluminum foil, aromatic polyester such as polyethylene terephthalate and polybutylene terephthalate, polyolefin such as polyethylene and polypropylene, olefin copolymer, nylon 6,
Polyamide such as nylon 66, polyvinyl alcohol,
Acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, polymethylmethacrylate, acrylic acid ester and methylmethacrylic acid ester copolymer, etc., preferably polyethylene terephthalate, a film produced from polybutylene terephthalate. . The surface of the substrate film may be subjected to surface treatment such as corona treatment or anchor coat treatment prior to the formation of the metal or ceramic vapor deposition layer.

The thickness of the vapor deposition layer in the vapor deposition film varies depending on the type of metal or ceramic to be vapor deposited, but is usually 10 to 300 nm, preferably 20 to 200 n.
m. If the thickness of the vapor deposition layer is too thin, a sufficient gas barrier cannot be obtained, and if it is too thick, the flexibility of the vapor deposition film is impaired and cracks occur in the vapor deposition layer, which is not preferable.
As the ceramic for forming the vapor-deposited layer, an inorganic oxide having a small thermal conductivity is usually used, and oxides of silicon, magnesium, manganese, nickel, chromium, indium, tin, etc., particularly silicon oxide is preferable.

Examples of the single layer film and the multilayer film made of plastic include vinylidene chloride resin film, vinylidene chloride resin coated film, polyvinyl alcohol film and the like.

As the bag (2) to be used, it is preferable to use a laminated film in which a heat-welding layer is provided on at least one surface of the above various gas barrier packaging materials. When the heat-welding layer is provided on one side of the gas barrier packaging material, the heat-welding layer is used inside the bag (on the side in contact with the heat insulating material). When the laminated film provided with the heat-welding layer is used in this way, a bag can be easily formed by the heat-sealing method (heat-sealing method), and a heat-insulating core material is sealed in the bag and then evacuated. The sealing of the exhaust port and the like can be easily performed by the heat welding method.

As the heat-welding layer, a resin that can be welded by heating, specifically, a resin that can be melted by heating at about 100 to 300 ° C. is used. Specific examples are polyolefin resins such as polyethylene and polypropylene, and nylon 6 , Polyamide resin such as nylon 66, acrylonitrile-butadiene-styrene copolymer, acrylonitrile copolymer such as acrylonitrile-styrene copolymer, polymethylmethacrylate, acrylic acid ester and methylmethacrylic acid ester copolymer, and the like, Polyolefin resins are preferred.

[Vacuum Heat Insulation Panel] The vacuum heat insulation panel of the present invention uses a heat insulation core material having a specific structure in which a tubular edge member is fitted in a through hole formed in a heat insulation base material. A significant structural feature is that the through-holes are formed by the seal portions in which the gas barrier packaging material is fused to both end surfaces of the edge member fitted to the material.

The above-mentioned characteristic structure of the vacuum heat insulating panel of the present invention will be described with reference to FIGS. FIG.
FIG. 5 is a schematic plan view showing a vacuum heat insulation panel in which the heat insulation core material (3a) shown in (a) is enclosed in a bag (2) made of the gas barrier packaging material shown in FIG. 6 is a schematic cross-sectional view taken along the line XX 'of FIG.

In FIGS. 5 and 6, (31a) represents a through hole portion, which is formed corresponding to the through hole (13a) of the heat insulating core material (3a). A (24a)
Represents a seal portion in which a gas barrier packaging material is fused to the end surface of the edge member (12a) fitted to the heat insulating base material (1a), and (41a) represents the gas barrier inside the seal portion A (24a). Represents a sex packaging material. Further, B (25) represents a seal portion formed by fusing the opening of the bag (2), and other reference numerals are the same as those in FIGS. 1 to 4.

The above-mentioned seal portion A (24a) functions to seal the inner peripheral portion of the through hole portion (31a) of the vacuum heat insulating panel by being dusted with the longitudinal portion of the edge member (12a). Therefore, since the seal portion A (24a) is formed, the gas barrier packaging material (41a) left inside the seal portion A (24a) is cut off or provided with a slit. However, the inside of the vacuum insulation panel is maintained to be evacuated. The remaining portion of the gas barrier packaging material (41a) is used for passing wiring, piping, equipment and the like.

In the through hole portion (31a) illustrated here, the seal portion A (24a) is formed in an annular shape with a width corresponding to the thickness of the edge member (12a), and this seal portion A (24a). ) Is not limited to such a shape, and is not particularly limited as long as it is continuously formed on the end surface of the edge member. The shape of the seal portion A (24a) is a quadrangle, a hexagon or the like depending on the shape of the end surface of the edge member (12a) used.

As can be understood from the above description, the through hole portion (31a) means a portion where the through hole can be formed in the vacuum heat insulating panel. In order to form a through hole in the through hole portion (31a), the gas barrier packaging material (41a) left inside the seal portion A (24a) is cut off,
A slit may be provided here. The vacuum heat insulating panel of the present invention also includes one in which the gas barrier packaging material (41a) is left inside the seal portion A (24a).

In the vacuum heat insulating panel of the present invention, the number of through holes and the positions where they are provided are appropriately determined according to the intended use of the vacuum heat insulating panel, and the shape and size of the through holes are determined by these. It can be appropriately determined according to the purpose of use, that is, the cross-sectional shape and size of wiring, piping, equipment and the like to be penetrated by using the through-hole portion. The cross-sectional shape of the through-hole portion is usually a polygon such as a circle, a quadrangle, or a hexagon, and its size can be appropriately determined as necessary regardless of the thickness of the heat insulating core material, and the diameter or the length of one side is usually It is about 1 to 100 mm.

Next, a method for manufacturing the vacuum heat insulating panel according to the present invention will be described. In the manufacturing method of the present invention, (a) a through hole is formed in the heat insulating base material, and a heat insulating core material in which a tubular edge member is fitted in the through hole is prepared (hereinafter, also referred to as “first step”). (B) The prepared heat insulating core material is stored in the bag with the opening portion of the bag made of the gas barrier packaging material (hereinafter, also referred to as “second step”), and then (c) the bag While maintaining the desired degree of vacuum by evacuating the inside of the bag through the opening, the seal portion (A) in which the gas barrier packaging material is fused to both end surfaces of the edge member of the heat insulating core, and the opening of the bag It is necessary to form a seal part (B) in which the gas barrier packaging materials are fused to each other (hereinafter, also referred to as “third step”).

Hereinafter, the manufacturing method of the present invention will be described in detail with reference to the above-mentioned FIGS. 1 to 6 showing an embodiment thereof. It is not limited to. In the manufacturing method of the present invention, the heat insulation core material shown in FIG. 3 (a) or FIG. 3 (b) can be used, and the heat insulation core material is composed of a gas barrier packaging material. As a bag,
The one shown in can be used. Figure 3 (a) or Figure 3 (b)
The heat-insulating core material shown in FIG.
1] to paragraph [0014].

In the manufacturing method of the present invention, the heat insulating core material shown in FIG. 3 (a) will be explained as a representative example. First, the heat insulating core material (3a) is inserted through the opening (21) of the bag (2). It is housed in the bag (2) (second step), and then, the inside of the bag is evacuated from the opening (21) of the bag (2) to maintain a desired degree of vacuum, and at the same time, the edge member of the heat insulating core material. A seal portion A (24a) where the gas barrier packaging materials are fused to each other and a seal portion B (25) where the gas barrier packaging materials are fused to each other at the opening of the bag are formed on both end surfaces of the sheet (third step). )
The desired vacuum insulation panel having the structure as shown in FIG. 5 is obtained.

In the above third step, the seal portion A (2
4a) and the order of forming the seal portion B (25) are not particularly limited. For example, (i) the seal portion A (A (2
4a) is formed, and then the seal portion B (25) is formed. (Ii) The seal portion A (24a) and the seal portion B (2)
5) at the same time, (iii) seal portion B (2
After forming 5), the seal portion A (24a) can be formed, and the same thing can be obtained in any order.

The seal portion A (24a) in the third step,
The seal portion B (25) is formed such that the inside of the bag (2) is evacuated and the entire bag (2) is heat-insulated core material (1).
To the edges of the heat insulation core material,
Since the upper and lower gas barrier packaging materials are in close contact with each other, they may be fused by an appropriate means.

When the heat insulating core material having only through holes is used, the thickness of the heat insulating core material is relatively large. Even if you evacuate and maintain the desired vacuum level,
It is difficult to bring the gas barrier packaging materials into close contact with each other along the inner circumference of the through hole, and it is difficult to form the seal portion here. However, in the method of the present invention, since the specific heat insulating core material to which the edge member is fitted is used and the gas barrier packaging material is fused to the end surface of the edge member to form the seal portion (A), There is no such problem.

Each of the seal portions (A (24a), B (2)
As the fusing means for forming 5)), various conventionally known methods can be used. For example, a heat-welding method (heat-sealing method) in which a heating block is pressed, a method in which a jig to which ultrasonic vibration is applied is pressed in, and a structure in which a conductor does not exist in the gas barrier packaging material and dielectric heat can be generated. If so, a method of pressing a jig to which a high-frequency electric field is applied can be adopted, but in general, a thermal welding method is simple and preferable.

The above seal portion A (24a) is provided to seal the through hole portion (31a) of the vacuum heat insulating panel, and the inside (41a) of this seal portion allows wiring, piping, equipment, etc. to pass through. Used to. In the through hole portion (31a) illustrated here, the seal portion A (24a) is formed in an annular shape, but as long as it is formed continuously over the entire circumference of the through hole portion (31a), the seal portion A (24a) is formed. 24a) is not limited to such a shape.

As described above, in the vacuum heat insulating panel obtained by the method of the present invention, the through hole portion (31a) means a portion where the through hole can be formed. In order to form a through hole in the through hole part (31a), after the third step, the gas barrier packaging material (41a) left inside the seal part A (24a) is cut off, or A slit may be provided. Therefore, the vacuum heat insulating panel obtained by the method of the present invention also includes one in which the gas barrier packaging material (41a) is left inside the seal portion A (24a).

[0054]

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the description of these examples unless it exceeds the gist. In the following description, “%” means weight basis unless otherwise specified.

Production Example [Production of Calcium Silicate Compact] Quick lime (CaO: 9)
49.6 parts by weight of warm demineralized water was added to 49.6 parts by weight (6.2% by weight) for slaked water to prepare lime milk having a sedimentation volume of 46 ml. The settling volume is the volume of the slaked lime particle settling layer measured after gently pouring 50 ml of lime milk into a cylindrical container having a diameter of 13 mm and a volume of 50 ml and allowing it to stand for 20 minutes.

The above lime milk was mixed with silica stone (S
iO _2: 96.4 wt%) 50.4 parts by weight was added (C
A molar ratio of aO / SiO ₂ charged was 1.05), and demineralized water was added so that the total amount of water with respect to the solid content was 35 weight times to obtain a suspension. The suspension was transferred to an autoclave having a volume of 10 liters, and a gauge pressure of 15 kg / cm ² ,
The mixture was reacted under stirring at a temperature of 200 ° C. for 3 hours to obtain an aqueous slurry of calcium silicate hydrate containing zonotolite as a main component.

Next, to 100 parts by weight of the obtained aqueous slurry, 1 part by weight of reinforcing glass fiber and 1 part by weight of pulp were added and mixed, and this was supplied to a dehydration molding machine for pressure dehydration molding. 200mm in length, 200mm in width, thickness about 2
A 0 mm plate-shaped molded body was dried at 150 ° C. for 8 hours to obtain the desired calcium silicate molded body. The obtained molded body had an apparent density of 0.066 g / cm ³ and a compressive strength of 2.8 kg / cm ² , and this molded body was composed of a spherical aggregate of needle-like crystals, and There were those in which needle-like crystals were present and those in which needle-like crystals were not present.

Example 1 Calcium silicate compact (200 m in length) obtained in the production example
m, width 200 mm, thickness about 20 mm) with a heat insulating substrate (1a) having a through hole with a diameter of 20 mm, and an outer diameter of 20 m
An edge member (12a) made of a 6-nylon tube having a length of m, a length of 20 mm, and a wall thickness of 5 mm is used, and the edge member (12a) is a through hole (11a) of the heat insulating base material (1a). The heat insulating core material (3a) was prepared by fitting the two surfaces so as to be flush with both surfaces. Further, as a bag (2) made of a gas barrier packaging material, polyethylene terephthalate (1
6 μ) / Al foil (9 μ) / polyethylene terephthalate (16 μ) / 6 nylon (30 μ) / laminated film, with the 6 nylon layer inside the bag to accommodate the heat insulating core (1) , Leaving the opening (21) 3
A bag having the shape shown in FIG. 4 with sealed sides was prepared.

These heat-insulating core materials (3a) and bags (2)
The heat-insulating core material (3a) is housed inside the bag (2) through the opening (21) for vacuum evacuation, and the inside of the bag (2) is opened to a gauge pressure of 0.02 Torr. While further evacuating, the gas barrier packaging material is adhered to both end surfaces of the edge member (12a), and a width of 5 m is applied to this portion by a heat welding method.
m, inner continuous diameter 10 mm, seal part A (24a)
After forming the seal, the seal portion B (25) is formed in the opening portion (21) of the bag (2) by a heat welding method, so that the through hole portion (31a) of the type shown in FIG. 5 (FIG. 6) is formed. A vacuum heat insulation panel having a seal part A (24
The wrapping material inside a) was cut off. In the obtained vacuum heat insulating panel, the thermal conductivity in the thickness direction of the main part of the panel (the part where there is no through hole) is 0.0095 Kcal.
/ M · hr · ° C.

Example 2 In the example described in Example 1, instead of the heat insulating substrate (calcium silicate molded body) used in the same example, heat insulation made of expanded polystyrene flat plate (length 200 mm, width 200 mm, thickness about 20 mm) A vacuum heat insulating panel having a through hole portion (31a) of the type shown in FIG. 5 (FIG. 6) was prepared in the same manner as in the example except that the core material (3a) was used.
The packaging material inside the seal portion A (24a) was cut off. In the obtained vacuum heat insulating panel, the thermal conductivity in the thickness direction of the main part of the panel (the part where the through hole does not exist) was 0.0.
It was 25 Kcal / m · hr · ° C.

[0061]

According to the present invention, the wiring in the plane of the panel,
Provided are a vacuum heat insulating panel having a through hole through which pipes, equipment, etc. can be passed, and an industrially advantageous manufacturing method of the vacuum heat insulating panel having this specific structure. In addition, by using this vacuum insulation panel with its through-holes matching the installation sites of wiring, piping, equipment, etc., it is possible to significantly suppress the deterioration of the insulation performance of the heat insulation wall surface. . Further, in the vacuum heat insulating panel of the present invention, since the through hole portion is formed by the seal portion in which the gas barrier packaging material is fused to both end surfaces of the edge member, the through hole portion with respect to the thickness of the vacuum heat insulating panel is formed. It is possible to reduce the inner diameter of
And its manufacture is also easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a heat insulating substrate used in the present invention.

FIG. 2 is a perspective view showing an example of an edge member used in the present invention.

FIG. 3 is a schematic sectional view showing an example of a heat insulating core material used in the present invention.

FIG. 4 is a perspective view showing an example of a bag made of a gas barrier packaging material used in the present invention.

FIG. 5 is a schematic plan view showing an example of the vacuum heat insulating panel of the present invention.

6 is a view of the vacuum insulation panel shown in FIG. 5, taken along line XX ′ in FIG.
2 is a schematic sectional view.

[Explanation of symbols]

 1a, 1b: Thermal insulation base material 11a, 11b: Through hole provided in the thermal insulation base material 111b: Flange fitting part 12a, 12b: Edge member 13a, 13b: Hollow part of the edge member (through hole of thermal insulation core material) 102a, 102b: End surface of edge member 103: Flange portion of edge member (12b) 104b: Cylindrical portion of edge member (12b) 3a, 3b: Insulating core material 2: Bag made of gas barrier packaging material 21: Opening portion of bag 2 22: Sealing part of bag 2 23: Sealing part of bag 2 24a: Sealing part (A) formed in through hole part 25: Sealing part (B) formed in opening part 31a: Through hole part of vacuum heat insulation panel 41a: Gas barrier packaging material inside the seal part (A)

Claims (12)

[Claims] 1. A vacuum heat insulation panel in which a heat insulation core material is enclosed in a bag made of a gas barrier packaging material in a vacuum-exhausted state, wherein the heat insulation core material is a through hole formed in a heat insulation base material. A vacuum heat insulation panel, characterized in that a cylindrical edge member is fitted in the hole, and a through hole portion is formed by a seal portion in which both ends of the edge member are fused with a gas barrier packaging material. . 2. The vacuum heat insulating panel according to claim 1, wherein a cutout or a slit is formed inside the seal portion. 3. The vacuum heat insulating panel according to claim 1 or 2, wherein the heat insulating base material is a porous inorganic molded body. 4. The vacuum heat insulation panel according to claim 1, wherein the heat insulation base material is a foamed resin molding having open cells. 5. The porous inorganic molded body contains calcium silicate in an amount of 5
The vacuum heat insulation panel according to claim 3, which is a molded product made of a composition containing 0% or more. 6. The vacuum heat insulation panel according to claim 4, wherein the foamed resin molded body is a foamed polyurethane molded body. 7. A method of manufacturing a vacuum heat insulating panel, wherein a heat insulating core material is enclosed in a bag made of a gas barrier packaging material in a state of being evacuated, and a through hole is formed in a heat insulating base material. A heat insulating core material in which a tubular edge member is fitted in the hole is created, and the heat insulating core material is stored in the bag through the opening of the bag made of the gas barrier packaging material, and the inside of the bag is vacuumed through the opening of the bag. While evacuating and maintaining a desired degree of vacuum, a seal portion (A) where the gas barrier packaging material is fused to both end surfaces of the edge member, and a seal where the gas barrier packaging materials at the opening of the bag are fused to each other. A method for manufacturing a vacuum heat insulating panel, which comprises forming a part (B). 8. The method for manufacturing a vacuum heat insulating panel according to claim 7, wherein after forming the seal portion (A), a cutout or a slit is formed inside the seal portion (A). 9. The method for producing a vacuum heat insulating panel according to claim 7, wherein the heat insulating base material is a porous inorganic molded body. 10. The method for producing a vacuum heat insulating panel according to claim 7, wherein the heat insulating base material is a foamed resin molded product having open cells. 11. A porous inorganic molded body containing calcium silicate 5
The method for producing a vacuum heat insulating panel according to claim 9, wherein the vacuum heat insulating panel is a molded body made of a composition containing 0% or more. 12. The method for manufacturing a vacuum heat insulation panel according to claim 10, wherein the foamed resin molded body is a foamed polyurethane molded body.