JPH08303686A - Vacuum heat insulating panel and manufacture of it - Google Patents

Abstract

PURPOSE: To enable a wire or a pipe to be inserted without deteriorating heat insulating properties by providing a through hole part and a cutout part on a vacuum heat insulating panel to be used for a heat insulating box body of a refrigerator, and forming seal parts by which gas barrier packing materials are welded to each other along the inner peripheries of the through hole and the cutout part. CONSTITUTION: In manufacturing of a vacuum heat insulating panel, a heat insulating core material 1 and a bag 2 made of a gas barrier packing material are used, the heat insulating core material 1 is housed in the bag 2 from an opening 21, and then the bag 2 is evacuated and exhausted from the opening 21. A seal part 24 by which gas barrier packing materials are welded to each other along the inner periphery of the through hole 31, a seal part 25 by which gas barrier packing materials are welded to each other along the inner periphery of the cutout 32, and a seal part 26 by which gas barrier packing materials of the bag 2 and the opening are welded to each other are formed while maintaining the desired degree of vacuum. A porous inorganic formed body made of composite containing calcium silicate of 50% or foamed resin formed body is preferably used for the heat insulating core material 1.

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 and / or a notch 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 base material and this is enclosed in a bag made of a gas barrier film in a reduced pressure state. Since this fine powder-filled type vacuum heat insulating panel uses fine powder as a heat insulating base material, its end portion has a bad rule of shape and dust is not generated sufficiently when it is discarded. Further, as an improved one of the drawbacks of the fine powder-filled type vacuum heat insulating panel, there is known a molded body-enclosed vacuum heat insulating panel using a foamed polyurethane molded body, a calcium silicate molded body or the like as a heat insulating base material.

In such a vacuum heat insulating panel, in addition to the low thermal conductivity of the heat insulating base material itself enclosed, the depressurized state of the inside significantly suppresses convective heat transfer inside the heat insulating panel. It is characterized in that it exhibits excellent heat insulation performance due to this 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 subjected to post-processing such as punching and notching, and thus has been restricted in use.

Taking a refrigerator as an example, an electric wire, a refrigerant gas pipe, a temperature adjusting device and the like are provided through the heat insulating wall surface, and a door hinge fixing member and the like are provided in the vicinity of the edge of the heat insulating wall surface. Has been. It is conceivable to use a conventional heat insulating plate (for example, a foamed polyurethane molded body or a calcium silicate molded body) capable of punching or notching at a portion where such wiring, piping, equipment, etc. are provided,
The heat insulation performance is inferior to that of the vacuum heat insulation panel, and this difference in heat insulation performance cannot be ignored in consideration of the period of use in units of years, and the economic loss thereof will be enormous. Also, combining a large area vacuum insulation panel with a small area vacuum insulation panel,
It is conceivable to use a small area vacuum insulation panel in the area where wiring, piping, equipment, etc. are installed, and to avoid the area where wiring, piping, equipment, etc. are installed, but there is a gap in the combined joint surface and heat insulation It will reduce the performance.

Such a problem is caused by using a vacuum heat insulating panel having a through hole portion through which wiring, piping, equipment, etc. can be formed in the surface thereof and / or a notch portion at its edge,
It is possible to solve the problem by disposing such a vacuum heat insulating panel so as to match the position where the wiring, the pipe, the device, and the member for fixing the door hinge are provided. However, a vacuum heat insulating panel having through holes and / or notches that can be used for this purpose, and a method for manufacturing a vacuum heat insulating panel having such a structure have not yet been developed, and their development has been strongly desired. .

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional state of the art, the present invention is capable of providing through holes and / or door hinge fixing members, etc., through which wiring, piping, equipment, etc. can pass. An object of the present invention is to provide a vacuum heat insulating panel having a cutout portion and a method for manufacturing the same.

[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 vacuum insulation panel, there is a through hole portion and / or a cutout portion, and a sealing portion in which gas barrier packaging materials are fused together along the inner peripheral portion of the through hole portion and / or the cutout portion. A means for forming a vacuum heat insulating panel having a structure in which the above is formed is taken.

Further, in the method of manufacturing a vacuum heat insulating panel according to the present invention, the heat insulating core material is a vacuum heat insulating panel which is enclosed in a bag made of a gas barrier packaging material in a vacuum-exhausted state, The vacuum heat insulating panel has a through hole and / or a notch, and a seal portion is formed along the inner periphery of the through hole and / or the notch by fusing gas barrier packaging materials together. In the method for manufacturing a vacuum heat insulating panel, a flat heat insulating core material having a through hole and / or a notch is housed in the bag through the opening of the bag made of a gas barrier packaging material. While evacuating the inside of the bag to maintain a desired degree of vacuum, the through hole and / or
Alternatively, a seal portion (A) in which the gas barrier packaging materials are fused to each other and an seal portion (B) in which the gas barrier packaging materials are fused to each other at the opening of the bag are formed along the inner peripheral portion of the cutout portion. The manufacturing method is adopted.

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.
4 will be described in detail with reference to FIGS. 4A to 4C, 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.

[Adiabatic core material] As the adiabatic core material, a plate-shaped adiabatic core material provided with through holes and / or notches in advance is used, and a specific example thereof is shown in a perspective view in FIG. In FIG. 1, (1) is a plate-shaped heat insulating core material, (11) is a through hole provided in the heat insulating core material (1), and (12) is a cut provided at the edge of the heat insulating core material (1). Represents a lack.

Although the example of the heat insulating core material illustrated here is provided with one through hole and one notch, only one of the through hole and the notch or a plurality of these are provided. May be. The positions where the through holes and the cutouts are provided are appropriately determined depending on the intended use of the vacuum heat insulating panel, and the shapes and dimensions of the through holes and the cutouts are determined according to these uses, that is, the through holes. It can be appropriately determined in accordance with the cross-sectional shape and size of the wiring, piping, equipment and the like to be penetrated through, and the shape and size of the door hinge fixing member and the like installed using the notch. The cross-sectional shape of the through hole is usually a polygon such as a circle, a quadrangle, or a hexagon, and its size is about 30 to 100 mm in diameter or one side, although it varies depending on the thickness of the heat insulating core.

The heat insulating core material 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. Can be used arbitrarily. 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 core 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-mentioned heat insulating core 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 performing a hydrothermal synthesis reaction under heating to obtain an aqueous slurry of calcium silicate hydrate, and then obtaining 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 either 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 and 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-like 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 core 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.

[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 insulation panel, a bag which is made of a gas barrier packaging material and which can accommodate the flat heat insulation core material (1) and has an opening for evacuation is usually used. Is shown in FIG. 2 as a perspective view. Figure 2
In (2), a bag made of a gas barrier packaging material,
(21) is the opening of the bag (2), (22) and (23)
Represents the seal of the bag (2).

The bag (2) used in the present invention is a container for accommodating the heat insulating core material (1) and, after the inside has been evacuated, a gas barrier packaging material that constitutes the bag. The gas impermeability of (1) serves to maintain the inside of the bag in a vacuum or highly depressurized state. Therefore, the opening portion (21) of the bag (2) contains the heat insulating core material (1), the inside of the bag is evacuated, and then the seal portion B (26) for sealing the heat insulating core material (see FIG. 3 described later). ) Can be formed.

As the gas barrier packaging material constituting the bag (2), in order to maintain the inside of the bag in a vacuum or highly depressurized state, 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. 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 or polybutylene terephthalate, polyolefin such as polyethylene or 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 monolayer film and 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 each 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 melted 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 ester and methylmethacrylate ester copolymer, and the like, Polyolefin resins are preferred.

[Vacuum Heat Insulation Panel] The vacuum heat insulation panel of the present invention has a through hole and / or a notch, and has a gas barrier property along the inner peripheral portion of the through hole and / or the notch. A major structural feature is that a seal portion formed by fusing the packaging materials together is formed.

The above characteristic structure of the vacuum heat insulating panel of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic plan view showing a vacuum heat insulation panel in which the heat insulation core material (1) shown in FIG. 1 is enclosed in a bag made of the gas barrier packaging material shown in FIG. FIG. 4 is a schematic cross-sectional view taken along line XX ′ of FIG.

3 and 4, (31) indicates a through hole portion, and (32) indicates a notch portion, which are respectively formed in the through hole (11) and the notch (12) of the heat insulating core material (1). Correspondingly formed. A (24) is a seal portion in which the gas barrier packaging materials are fused together along the inner peripheral portion of the through hole portion (31), and A (25) is gas along the inner peripheral portion of the cutout portion (32). Represents a seal part made by fusing barrier packaging materials together,
(41) and (42) represent the gas barrier packaging material inside the seal portion A (24) and the seal portion A (25), respectively. Further, B (26) represents a seal portion formed by fusing and sealing the opening of the bag (2), and other reference numerals are the same as those in FIGS. 1 and 2.

The seal portion A (24) and the seal portion A (25) have a function of sealing the inner peripheral portions of the through hole portion (31) and the cutout portion (32) of the vacuum heat insulating panel. The inside (41, 42) of each of these seal portions is used for passing wiring, piping, equipment, etc., and for providing a member for fixing a door hinge, etc.

In the through hole portion (31) illustrated here, the seal portion A (2 along the inner peripheral portion of the through hole portion (31).
4) is formed in an annular shape with a required width, but the seal portion A (24) is not limited to such a shape and is continuously formed along the inner peripheral portion of the through hole portion (31). As long as it is provided, it may extend over the entire surface in the through hole portion (31). The same applies to the notch (32),
In the figure, the seal portion A (25) is formed in a reverse U shape with a required width, but as long as it is continuously formed along the inner peripheral portion of the cutout portion (32), the cutout portion is formed. It may be the entire surface within (32).

As can be understood from the above description, the through hole portion (31) means a portion where the through hole can be formed,
The notch portion (32) means a portion where the notch can be formed. To form a through hole in the through hole portion (31), the inside (41) of the seal portion A (24) may be cut off or a slit may be provided here. Further, in order to form the notch in the notch (32), the inside (42) of the seal portion A (25) is formed.
You can cut out. The vacuum heat insulating panel of the present invention also includes one in which the gas barrier packaging material is left inside the seal portion A (24) inside (41) and the seal portion A (25) inside (42).

Next, a method for manufacturing the vacuum heat insulating panel according to the present invention will be described. In the production method of the present invention, (a) a plate-shaped heat insulating core material having a through hole and / or a notch is housed in a bag having an opening of a bag made of a gas barrier packaging material (hereinafter, (Also referred to as "first step"), and then (b) the inside of the bag is evacuated from the opening of the bag to maintain a desired degree of vacuum, and along the inner periphery of the through hole and / or the notch. To form a seal portion (A) in which the gas barrier packaging materials are fused together and a seal portion (B) in which the gas barrier packaging materials are fused together at the opening of the bag (hereinafter, also referred to as “second step”). Need to say).

Hereinafter, the manufacturing method of the present invention will be described in detail with reference to the above-mentioned FIGS. 1 to 4 showing an example of the embodiment, but as long as it does not exceed the gist, it is limited to the method exemplified here. Not something. In the manufacturing method of the present invention, the flat insulating core material having through holes and / or notches may be the one shown in FIG. 1, and the gas barrier property for accommodating the insulating core material may be used. The bag shown in FIG. 2 can be used as the bag made of the packaging material.

In the manufacturing method of the present invention, the bag (2) made of the heat insulating core material (1) and the gas barrier packaging material is used. First, the heat insulating core material (from the opening (21) of the bag (2) ( 1) is housed in the bag (2) (first step), and then the bag is evacuated from the opening (21) of the bag (2) to maintain a desired degree of vacuum while the through hole is formed. The seal part A (2) in which the gas barrier packaging materials are fused together along the inner peripheral part of (31)
4) and / or the seal portion A (2) in which the gas barrier packaging materials are fused together along the inner peripheral portion of the cutout portion (32).
5), and forming a seal portion B (26) in which the gas barrier packaging materials at the opening of the bag are fused (second step)
As a result, the desired vacuum heat insulating panel having the structure as shown in FIG. 3 is obtained.

In the above second step, the seal portion A (2
4), seal portion A (25), and seal portion B (26)
There is no particular limitation on the order of forming the. For example, (i)
After forming the seal portion A (A (24), A (25)), the seal portion seal portion B (26) is formed (i
i) The seal portion A (A (24), A (25)) and the seal portion seal portion B (26) are simultaneously formed. (iii) The seal portion seal portion B (26) is formed, and then the seal portion A is formed. (A (24), A (25)) can be formed, and the same thing can be obtained in any order.

The formation of the seal portion A (24), the seal portion A (25), and the seal portion B (26) in the second step is performed as the inside of the bag (2) is vacuum-exhausted.
The whole is in close contact with the heat insulating core material (1), and the gas barrier packaging materials above and below the heat insulating core material (1) are in close contact with each other at the through holes and the notches provided in the heat insulating core material (1) and the opening of the bag. Therefore, it may be fused by an appropriate means.

When the heat insulating core material (1) having a through hole (11) and a notch (12) having a relatively large thickness and particularly small dimensions is used, the inside of the bag is evacuated to a desired value. Even if the vacuum degree is maintained, it may be difficult to bring the gas barrier packaging materials into close contact with each other along the inner periphery of the through hole (11) or the notch (12). In such a case, when an assisting plug having a cross section slightly smaller than the cross section of the through hole (11) or the notch (12) is prepared and a contacting assisting means such as pressing the assist plug from one or both is used, The gas barrier packaging materials can be reliably brought into close contact with each other.

As the fusing means for forming the above-mentioned respective seal portions, 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 seal portion A (24) and the seal portion A (25) are provided to seal the inner peripheral portions of the through hole portion (31) and the cutout portion (32) of the vacuum heat insulating panel. The insides (41, 42) of these seals are used for passing wires, pipes, equipment, etc., or for providing members for fixing door hinges, etc.

In the through hole portion (31) illustrated here, the seal portion A (2 along the inner peripheral portion of the through hole portion (31).
Although 4) is formed in an annular shape with a required width, the seal portion A (24) is not limited to such a shape and is continuously formed along the inner peripheral portion of the through hole portion (31). As long as it is provided, it may be formed over the entire surface in the through hole portion (31). The same applies to the cutout portion (32). In the figure, the seal portion A (25) is formed in a reverse U shape with a required width, but along the inner peripheral portion of the cutout portion (32). As long as it is formed continuously, it may be formed over the entire surface of the notch (32).

In the vacuum heat insulation panel obtained by the method of the present invention, the through hole portion (31) means a portion where a through hole can be formed, and the notch portion (32) means a portion where a notch can be formed. Means

In order to form the through hole in the through hole portion (31), after the second step, the inside (41) of the seal portion A (24) may be cut off or a slit may be provided therein. In addition, to form a notch in the notch (32),
Similarly, after the second step, the inside (42) of the seal portion A (25) may be cut off. Therefore, in the vacuum heat insulation panel obtained by the method of the present invention, the gas barrier packaging material is left inside the seal part A (24) inside (41) or the seal part A (25) inside (42). Is also included.

[0047]

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 lime milk is 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 product has an apparent density of 0.066.
g / cm ³ and compressive strength 2.8 kg / cm ² , and this molded body is composed of a spherical aggregate of needle-like crystals, and needle-like crystals are present inside the sphere. Some of the crystals were not present.

Example 1 As a heat insulating core material (1), the calcium silicate compact (200 mm in length, 200 mm in width, about 20 m in thickness) obtained in the production example was prepared.
m) with a through hole having a diameter of 50 mm was prepared. Further, as the bag (2) made of a gas barrier packaging material, a laminated film composed of 6 nylon (30 μ) / polyethylene terephthalate (16 μ) / Al (9 μ) / polyethylene terephthalate (16 μ) / 6 nylon (30 μ) A bag having the shape shown in FIG. 2 in which the heat insulating core material (1) can be housed, and the three sides are sealed, leaving the opening (21), was prepared.

Using these heat-insulating core material (1) and bag (2), the heat-insulating core material (1) is housed inside the vacuum exhaust opening (21) of the bag (2) to form the bag (2). While evacuating the interior from the opening (21) to a gauge pressure of 0.02 Torr, the gas barrier packaging material portion located in the through hole has a cross section that is slightly smaller than the cross section of the through hole (11). Press the plug to ensure a tight contact,
Along the inner circumference of the through hole portion (31), a width of 5
mm, continuous seal part A (24) with an inner diameter of 30 mm
At the same time as forming the seal portion B (26) by the heat welding method in the opening portion (21) of the bag (2), a through hole portion similar to that shown in FIG. 3 (FIG. 4) is formed. (3
A vacuum insulation panel having only 1) was prepared, and then the packaging material inside the seal part A (24) was cut off. In addition,
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 0.009.
It was 5 Kcal / m · hr · ° C.

Example 2 In the example described in Example 1, as the heat insulating core material (1),
Calcium silicate compact (200 m in length) obtained in the production example
m, width 200 mm, thickness about 20 mm), except that a notch (12) having a length and width of 50 mm is provided on one edge of the notch as in the same example. 5m width along the inner circumference of the part (32) by heat welding
3 (FIG. 4) by simultaneously forming a continuous seal portion A (25) of m and also forming a seal portion B (26) in the opening portion (21) of the bag (2) by a heat welding method.
A vacuum insulation panel having only a notch (32) similar to that shown in (1) was prepared, and then the wrapping material inside the seal A (25) was cut off. In addition, 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 notch portion does not exist) was 0.0095 Kcal /
It was m · hr · ° C.

[0055]

According to the present invention, the wiring in the plane of the panel,
(EN) Provided are a vacuum heat insulating panel having a through hole through which piping, equipment, etc. can be passed and / or a notch in the edge of which a door hinge fixing member and the like can be provided, and an industrially advantageous manufacturing method of the vacuum heat insulating panel having this specific structure. To be done. In addition, this vacuum insulation panel, wiring, piping,
By using it in conformity with the installation site of the equipment and the door hinge fixing member, it is possible to significantly suppress the deterioration of the heat insulation performance on the heat insulation wall surface.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing an example of a bag made of a gas barrier packaging material used in the present invention.

FIG. 3 is a schematic plan view showing an example of the vacuum heat insulating panel of the present invention.

4 is a view of the vacuum insulation panel shown in FIG. 3, taken along line XX ′ in FIG. 3;
2 is a schematic sectional view.

[Explanation of symbols]

 1: Heat insulation core material 11: Through hole provided in heat insulation core material 12: Notch provided in heat insulation core material 2: Bag made of gas barrier packaging material 21: Opening portion of bag 2 22: Sealing portion of bag 2 23 : Sealing part of bag 2 24: Sealing part formed in through hole part 25: Sealing part formed in cutout part 26: Sealing part formed in opening part 31: Through hole part of vacuum insulation panel 32: Vacuum Notch part of heat insulation panel 41: Inside of seal part (through hole part) 42: Inside of seal part (notch part)

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[Procedure amendment]

[Submission date] August 29, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 7

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

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 flat heat insulating core material having through holes and / or notches is housed in the bag through the opening of the bag made of a gas barrier packaging material, and the inside of the bag is evacuated to a desired degree. A seal part (A) in which gas barrier packaging materials are fused together along the inner periphery of the through hole and / or the notch while maintaining the degree of vacuum, and the gas barrier packaging material at the opening of the bag. A manufacturing method is adopted in which a sealing part (B) is formed by fusing each other.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

The heat insulating core material illustrated here is provided with one through hole and one notch, but only one of the through hole and the notch or a plurality of these are provided. Good. The positions where the through holes and the notches are provided are appropriately determined depending on the intended use of the vacuum heat insulating panel, and the shapes and dimensions of the through holes and the notches are used for these purposes, that is, the through hole portion of the vacuum heat insulating panel. Can be appropriately determined according to the cross-sectional shape and size of wiring, piping, equipment and the like to be penetrated by utilizing the above, and the shape and size of the door hinge fixing member and the like to be installed utilizing the notch. The cross-sectional shape of the through-hole is usually a circle or a polygon such as a quadrangle or a hexagon, and its size varies depending on the thickness of the heat insulating core material, but the diameter or the length of one side is 30 to 1.
It is about 00 mm.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

In the above second step, the seal portion A (2
4), seal portion A (25), and seal portion B (26)
There is no particular limitation on the order of forming the. For example, (i)
(Ii) The seal portion A (A (24), A (25)) and the seal portion are formed after forming the seal portion A (A (24), A (25)). B (26)
(Iii) After forming the seal portion B (26), the seal portions A (A (24), A (2) are formed simultaneously.
5)) can be formed and the same is obtained in either order.

Claims (15)

[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 state of being evacuated, wherein the vacuum heat insulation panel has through holes and / or notches. A vacuum heat-insulating panel, characterized in that a seal portion is formed by fusing gas barrier packaging materials together along the inner peripheral portion of the through hole portion and / or the cutout portion. 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 insulation panel according to claim 1, wherein the heat insulation core material is a porous inorganic molded body. 4. The vacuum heat insulation panel according to claim 1, wherein the heat insulation core 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 vacuum insulation panel in which a heat insulation core material is enclosed in a bag made of a gas barrier packaging material in a state of being evacuated, wherein the vacuum insulation panel has through holes and / or notches. And a through hole and / or a notched portion along the inner peripheral portion of the gas barrier packaging material is sealed to form a seal portion, the method for manufacturing a vacuum insulation panel, the through hole and A flat heat insulating core material with a cutout is stored in the bag opening made of a gas barrier packaging material in the bag, and the bag is evacuated from the bag opening to a desired degree of vacuum. Through hole and / or
Alternatively, a seal portion (A) in which the gas barrier packaging materials are fused to each other and an seal portion (B) in which the gas barrier packaging materials are fused to each other at the opening of the bag are formed along the inner peripheral portion of the cutout portion. A method for manufacturing a vacuum heat insulating panel, comprising: 8. The method for manufacturing a vacuum heat insulating panel according to claim 7, wherein the seal portion (A) is formed and then the seal portion (B) is formed. 9. The method for manufacturing a vacuum heat insulating panel according to claim 7, wherein the seal portion (A) and the seal portion (B) are formed at the same time. 10. The method for manufacturing a vacuum heat insulating panel according to claim 7, wherein the seal portion (B) is formed and then the seal portion (A) is formed. 11. The method according to claim 7, wherein after forming the seal portion (A), a cutout or a slit is formed inside the seal portion (A).
A method for manufacturing a vacuum insulation panel according to the item. 12. The method for manufacturing a vacuum heat insulating panel according to claim 7, wherein the heat insulating core material is a porous inorganic molded body. 13. The method for manufacturing a vacuum heat insulation panel according to claim 7, wherein the heat insulation core material is a foamed resin molding having open cells. 14. A porous inorganic molded body containing calcium silicate 5
The method for producing a vacuum heat insulating panel according to claim 12, wherein the vacuum heat insulating panel is a molded product made of a composition containing 0% or more. 15. The method for manufacturing a vacuum heat insulating panel according to claim 13, wherein the foamed resin molded body is a foamed polyurethane molded body.