WO2014122939A1

WO2014122939A1 - Insulation panel

Info

Publication number: WO2014122939A1
Application number: PCT/JP2014/000670
Authority: WO
Inventors: 宅島　司; 遠田　正和; 麻衣子中里
Original assignee: パナソニック株式会社
Priority date: 2013-02-07
Filing date: 2014-02-07
Publication date: 2014-08-14
Also published as: CN104995447A; JPWO2014122939A1

Abstract

An insulation panel is provided with at least a vacuum insulation material (3) and a foam insulation material. The core material (8) of the vacuum insulation material (3) is covered by an outer cover material (9) and is vacuum sealed. The thickness of the vacuum insulation material (3) is at least 1/2 of the thickness of the insulation panel. The vacuum insulation material (3) comprises a fin fixing section (12) in which a fin section (11) that is a peripheral edge section is folded over and fixed to the central side of the vacuum insulation material (3). The fin section (11) is fixed by an adhesive member (4) that is arranged on the inner surface of the fin section (11).

Description

Thermal insulation panel

The present invention relates to a heat insulating panel provided with a vacuum heat insulating material and a foam heat insulating material between a front surface material and a back surface material.

In recent years, attention has been focused on energy-saving technology, and various products such as refrigerators and vending machines equipped with vacuum insulation have been released and gained popularity. This vacuum heat insulating material is obtained by sealing a core material such as glass wool and an adsorbent under reduced pressure in a jacket material having a gas barrier property, and has a heat insulating performance about 20 times that of a conventional urethane foam. For this reason, the vacuum heat insulating material is attracting attention as an effective means that can achieve energy saving while satisfying customer demands for refrigerators that have a large internal volume with respect to the external dimensions.

Also in the housing field, it is known from Patent Document 1 that glass wool or a vacuum heat insulating material is used in a conventional wall.

Recently, an in-situ heat insulation method in which a vacuum heat insulating material and urethane foam are multilayered from the indoor side has been proposed taking advantage of the feature of the vacuum heat insulating material that can make the thickness thin by making use of high heat insulating properties. This inner heat insulation method can obtain high heat insulation without narrowing the indoor space using a thin vacuum heat insulating material, and moreover, it can be constructed from the indoor side compared to general heat insulation methods. The cost and construction period can be reduced without any major construction.

JP 2012-12860 A

By the way, in the above-mentioned inner heat insulating method, after fixing the vacuum heat insulating material to the surface material and filling the periphery with urethane foam, it is necessary to adhere the entire surface of the outer surface of the vacuum heat insulating material to the urethane foam. However, in the vacuum heat insulating material, there is a fin portion (peripheral edge portion of the vacuum heat insulating material) in addition to the portion where the core material is sealed, and the fin portion impairs urethane filling properties. Folded to the center of the material and fixed with a tape whose material is OPP (biaxially oriented polypropylene).

Since this OPP tape does not adhere to the urethane foam, there is a problem that the portion peels off and a dent deformation is likely to appear in the surface layer portion.

In particular, a thin vacuum heat insulating material has a problem that if there is a portion where the vacuum heat insulating material and the urethane foam do not adhere as described above, the surface layer portion is likely to be deformed, resulting in a defective product.

The present invention solves the above-mentioned conventional problems, and even if it is a thinly attached internal heat insulating panel, a good appearance quality can be obtained.

In order to achieve the above object, the heat insulation panel of the present invention is a heat insulation panel including at least a vacuum heat insulation material and a foam heat insulation material, and the vacuum heat insulation material is vacuum-sealed with a core material covered with a jacket material. The thickness of the vacuum heat insulating material is 1/2 or more of the thickness of the heat insulating panel, and the fin is fixed to the vacuum heat insulating material by folding the fin portion, which is a peripheral portion, to the center side of the vacuum heat insulating material. The fin portion is fixed by an adhesive member disposed on the inner surface of the fin portion.

According to the said structure, even if it is a thin heat insulation panel whose thickness of a foam heat insulating material is 15 mm or less, a part which a foam heat insulating material does not adhere easily to a fin fixed part arises by fixing a fin part using an adhesive member. This can be suppressed. For this reason, the part which a foaming heat insulating material peels is suppressed, and it can suppress that the dent deformation | transformation in a surface layer part appears. Thereby, a good appearance quality can be obtained.

According to the heat insulation panel according to the present invention, it is possible to suppress the foam heat insulating material from being peeled off from the vacuum heat insulating material, and to obtain a good appearance quality.

FIG. 1 is a cross-sectional view of a heat insulation panel according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the vacuum heat insulating material shown in FIG. FIG. 3 is a perspective view seen from the front of the vacuum heat insulating material shown in FIG. FIG. 4 is a cross-sectional view of a heat insulation panel of Modification 1 according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view of the heat insulation panel according to Embodiment 2 of the present invention. FIG. 6 is a cross-sectional view of a heat insulation panel of Modification 1 according to Embodiment 2 of the present invention.

1st invention is equipped with the vacuum heat insulating material, the foam heat insulating material, and the adhesive member, the core material is accommodated in the bag formed with the jacket material, and is vacuum-sealed. The thickness is ½ or more of the thickness of the heat insulation panel, the fin portion that is the peripheral portion of the vacuum heat insulating material is folded back to the center side of the vacuum heat insulating material, the adhesive member is disposed on the inner surface of the fin portion, The first portion on the inner side of the fin portion of the jacket material is fixed by an adhesive member.

2nd invention is equipped with the vacuum heat insulating material, the foam heat insulating material, and the adhesive member, and the vacuum heat insulating material contains the core material in the bag formed of the jacket material, and is vacuum-sealed. The thickness is ½ or more of the thickness of the heat insulating panel, the fin portion which is the peripheral portion of the vacuum heat insulating material is folded back to the center side of the vacuum heat insulating material, and the adhesive members are the outer surface of the fin portion and the fin portion of the jacket material. It arrange | positions so that it may cover the 2nd part of the inner side rather than, and the fin part and the 2nd part are being fixed by the adhesive member.

The vacuum heat insulating material used in the first or second invention may be sealed under reduced pressure using a moisture adsorbent together with the core material. Thereby, the residual moisture adhering to the core material and moisture entering from the outside can be adsorbed and the reduced pressure state can be maintained. For this reason, since the fall of the heat insulation of a vacuum heat insulating material can be suppressed, and since the air which penetrate | invades from the outside is further adsorbed when a moisture adsorbent and a gas adsorption device are used, a reduced pressure state can be maintained. The high heat insulation performance of the vacuum heat insulating material can be maintained over a long period of time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted. Further, in all the drawings, only components necessary for explaining the present invention are extracted and illustrated, and other components may be omitted from illustration. Furthermore, the present invention is not limited to the following embodiments.

(Embodiment 1)
The heat insulating panel according to Embodiment 1 of the present invention is a heat insulating panel including at least a vacuum heat insulating material and a foam heat insulating material, and the vacuum heat insulating material is vacuum-sealed with a core material covered with a jacket material, The thickness of the vacuum heat insulating material is 1/2 or more of the thickness of the heat insulating panel, and the vacuum heat insulating material has a fin fixing portion in which a fin portion which is a peripheral portion is folded and fixed to the center side of the vacuum heat insulating material, Is fixed by an adhesive member disposed on the inner surface of the fin portion.

In the heat insulation panel according to Embodiment 1 of the present invention, the adhesive member may be a hot melt adhesive.

Further, the heat insulating panel according to Embodiment 1 of the present invention may further include a front surface material and a back surface material arranged so as to sandwich the vacuum heat insulating material or the foam heat insulating material.

[Configuration of thermal insulation panel and vacuum thermal insulation]
FIG. 1 is a cross-sectional view of a heat insulation panel according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the vacuum heat insulating material shown in FIG. FIG. 3 is a perspective view seen from the front of the vacuum heat insulating material shown in FIG.

As shown in FIG. 1, the heat insulation panel 20 in this Embodiment 1 is provided with the vacuum heat insulating material 3 between the surface material 1 and the back surface material 2, and is filled with urethane foam (foam heat insulating material) 5. Yes.

Further, as shown in FIG. 2, the vacuum heat insulating material 3 is sealed in a vacuum after a core material 8 made of fibers such as glass, a moisture adsorbent 6 and a gas adsorbent 7 are enclosed in a jacket material 9. More specifically, in the first embodiment, the jacket material 9 includes a first laminate film 9a and a second laminate film 9b, and is configured by the first laminate film 9a and the second laminate film 9b. The core material 8, the moisture adsorbent 6, and the gas adsorbent 7 are accommodated in the bag.

The outermost layer of the first laminate film 9a and the second laminate film 9b is made of nylon, and a nylon film, an aluminum deposited film of PET film, and a polyethylene film are laminated from the outside.

It is also possible to use a nylon film and an aluminum foil instead of the PET film aluminum vapor deposition film.

As the moisture adsorbent 6, for example, a chemical adsorption material such as calcium oxide or magnesium oxide, or a physical adsorption material such as zeolite can be used. The gas adsorbent 7 is sealed in the storage container 10 and is opened after the vacuum heat insulating material 3 is sealed, thereby increasing the sealing degree of the vacuum heat insulating material 3 and improving the heat insulating performance.

Examples of the gas adsorbent 7 include zirconium, vanadium and tungsten alloys, iron, manganese, yttrium, alloys containing one element of lanthanum and rare earth elements, Ba-Li alloys, and zeolites ion-exchanged with metal ions. Is mentioned. Moreover, as a material of the storage container 10, metal materials, such as aluminum, iron, a trunk | drum, and stainless steel, are mentioned.

Further, as shown in FIGS. 1 to 3, the fin portion 11, which is the peripheral edge portion of the vacuum heat insulating material 3 (cover material 9), is folded back toward the center of the vacuum heat insulating material 3. An adhesive member 4 is disposed on the inner surface of the fin portion 11 facing the outer cover material 9. And the fin part 11 is being fixed to the 1st part 13 of the inner side rather than the fin part 11 of the jacket material 9 with the adhesive member 4. FIG. The first portion 13 is a portion of the outer cover material 9 that faces the fin portion 11 when the fin portion 11 is folded back. Moreover, the part in which the fin part 11 in the vacuum heat insulating material 3 is being fixed to the 1st part 13 comprises the fin fixing | fixed part 12. FIG.

The adhesive member 4 uses a hot-melt adhesive in the first embodiment. As the hot-melt adhesive, for example, an olefin-based hot-melt material such as “MORESCOME RAC-18Z” manufactured by MORESCO Co., Ltd. may be used. The application amount of the adhesive member 4 to the fin portion 11 may be, for example, 0.5 gram / m to 1.5 gram / m. Further, the adhesive member 4 may be applied to the fin portion 11 in a board shape or a bead shape.

[Method of manufacturing heat insulating panel and vacuum heat insulating material]
Next, the manufacturing method of the heat insulation panel 20 which concerns on this Embodiment 1 is demonstrated.

First, a rectangular first laminated film 9a and a rectangular second laminated film 9b are produced, and are arranged so that the first laminated film 9a and the second laminated film 9b face each other, thereby producing a laminate.

Next, the three sides of the peripheral portions of the first laminate film 9a and the second laminate film 9b are pressed while being heated and thermally welded to produce a bag-like laminate film. Under the present circumstances, it seals because the part which the polyethylene films located in the innermost side contact is heat-welded. Next, the storage container 10 storing the core material 8, the moisture adsorbent 6 and the gas adsorbent 7 is inserted from the opening of the bag-shaped laminate film, and the inside of the bag-shaped laminate film is used using a vacuum packaging machine. The vacuum heat insulating material 3 is obtained by thermally welding the opening while evacuating.

Next, after fixing the back material 2 and the vacuum heat insulating material 3 with double-sided tape, the urethane foam 5 is foamed and applied between the surface material 1 and the back material 2. And the heat insulation panel 20 is obtained by hold | suppressing with the surface material 1 so that it may become fixed thickness.

[Example 1]
Here, an example (Example 1) of the heat insulation panel 20 manufactured with the said manufacturing method is demonstrated. In the heat insulation panel 20 of Example 1, the thickness t2 at the inner dimension of the heat insulation panel 20 was 15 mm, whereas the thickness t1 of the vacuum heat insulating material 3 was 8 mm. That is, the thickness t1 of the vacuum heat insulating material 3 was equal to or greater than ½ of the thickness t2 of the heat insulating panel 20.

Further, the distance Δt = t2−t1 from the vacuum heat insulating material 3 to the back surface material 2 of the heat insulating panel 20 was 15 mm−8 mm = 7 mm, and it was a very thin urethane foam layer where Δt was 10 mm or less. It did not occur and the appearance deformation could be prevented.

In addition, in the heat insulation panel 20 of the said Example 1, (DELTA) t was a thing of 10 mm or less, However, When it experimented, even if (DELTA) t is a thing of 10 mm or more and 20 mm or less, an unevenness | corrugation is on the surface of the heat insulation panel 20. It did not occur and the appearance deformation could be prevented.

[Effect of insulation panel]
As described above, the surface of the tape is exposed to the vacuum heat insulating material 3 when the fin portion 11 is fixed with a tape having poor adhesion to urethane foam as in the prior art. For this reason, urethane does not adhere to the tape surface, and the density of the urethane foam is low, or the urethane foam is separated to form a recess, which may cause appearance deformation.

However, as in the first embodiment, an adhesive member (hot melt adhesive) 4 is arranged between the fin portion 11 and the jacket material 9, and the fin portion 11 is fixed by the hot melt adhesive. As a result, the surface of the tape with poor adhesion to the urethane foam is not exposed. For this reason, also in the fin fixing | fixed part 12, external appearance deformation | transformation can be prevented because the jacket material 9 and the urethane foam 5 contact | adhere directly.

Thus, in the heat insulation panel 20 according to the first embodiment, it is possible to suppress the occurrence of a portion where the urethane foam 5 is difficult to adhere to the fin fixing portion 12. For this reason, generation | occurrence | production of the part from which the urethane foam 5 peels is suppressed, and it can suppress that the dent deformation | transformation in a surface layer part appears. Thereby, in the heat insulation panel 20 which concerns on this Embodiment 1, a favorable external appearance quality can be obtained.

In Embodiment 1, the first laminate film 9a and the second laminate film 9b are used as the covering material 9, and the four heat insulating sides are used to obtain the vacuum heat insulating material 3. However, the present invention is not limited to this. For example, a form in which the vacuum heat insulating material 3 is obtained by folding one rectangular outer covering material 9 in two and welding three sides other than the folded portion may be adopted.

[Modification 1]
Next, the heat insulation panel of the modification 1 in this Embodiment 1 is demonstrated.

FIG. 4 is a cross-sectional view of the heat insulation panel of Modification 1 according to Embodiment 1 of the present invention.

As shown in FIG. 4, the heat insulation panel 20 of the modification 1 in this Embodiment 1 has the same basic structure as the heat insulation panel 20 according to Embodiment 1, but the vacuum heat insulating material 3 is a foamed phenol foam 15. The surface material 1 and the back surface material 2 are used, the surface material 1 and the back surface material 2 are not disposed, the surface material 1 and the back surface material 2 are used as the adhesive member 4. It differs from the point which forms the heat insulation panel without.

Specifically, the adhesive member 4 is disposed so as to stick the inner surface of the fin portion 11 and the first portion 13 of the jacket material 9. In addition, as a double-sided tape, you may use the double-sided tape which apply | coated the acrylic adhesive to the base material, for example.

Further, in the first modification, the foamed phenol foam 15 is used as the foam heat insulating material. In addition, as a foaming heat insulating material, you may use a foaming polypropylene etc., for example.

Even the heat insulation panel 20 of the first modification configured as described above has the same effects as the heat insulation panel 20 according to the first embodiment.

In addition, as a result of manufacturing the heat insulation panel which takes the structure of the heat insulation panel 20 of the said modification 1, these inventors etc. are the one main surface of the heat insulation panel 20, and the outer surface of the fin part 11 in the vacuum heat insulating material 3. Even when the distance Δt between them is 10 mm or more and 20 mm or less, it has been confirmed that unevenness does not occur on the surface of the heat insulation panel and appearance deformation can be prevented.

Further, the present inventors have a heat insulation panel in which the fin portion 11 is fixed to the inner side of the fin portion 11 of the jacket material 9 using a normal aluminum tape, and Δt is 10 mm or more and 20 mm or less. Even so, it is observed that deformation has occurred on the surface.

(Embodiment 2)
The heat insulation panel according to Embodiment 2 of the present invention is a heat insulation panel including at least a vacuum heat insulation material and a foam heat insulation material, and the vacuum heat insulation material is vacuum-sealed with a core material covered with a jacket material, The thickness of the vacuum heat insulating material is ½ or more of the thickness of the heat insulating panel. The vacuum heat insulating material has a fin fixing portion in which a fin portion which is a peripheral portion is folded and fixed to the center side of the vacuum heat insulating material, Is fixed by an adhesive member from the outer surface of the fin portion, and the surface of the adhesive member has a close contact portion with good adhesion to the foam heat insulating material.

The good adhesion of the adhesion part in the present invention means that the OPP (biaxially oriented polypropylene) tape and urethane foam as described in the prior art are bonded, or the outer surface material of the jacket material is nylon. This refers to those with stronger adhesive strength than urethane foam.

Moreover, in the heat insulation panel according to Embodiment 2 of the present invention, the adhesive member is a tape, and a close contact portion may be provided on the outer surface side of the tape.

Furthermore, in the heat insulation panel according to Embodiment 2 of the present invention, the close contact portion may be formed in a shape having irregularities.

[Configuration of thermal insulation panel]
FIG. 5 is a cross-sectional view of the heat insulation panel according to Embodiment 2 of the present invention.

As shown in FIG. 5, the heat insulation panel 20 according to the second embodiment has the same basic configuration as the heat insulation panel 20 according to the first embodiment, but uses a tape as the adhesive member 4. The point that the fin part 11 is fixed by the adhesive member 4 from the outer surface of the fin part 11 is different.

Specifically, the adhesive member 4 is disposed so as to cover the outer surface of the fin portion 11 and the second portion 14 on the inner side of the fin portion 11 of the covering material 9, and the fin portion 11 and the second portion 14. Are fixed by the adhesive member 4. The second portion 14 is a portion located closer to the center of the vacuum heat insulating material 3 than the first portion 13.

In the second embodiment, the surface 4a of the tape used as the adhesive member 4 has a close contact portion that is treated with the urethane foam 5 and enhanced. As a close_contact | adherence part, you may be comprised by the shape which has an unevenness | corrugation, for example. The uneven shape may be a mesh-like uneven shape such as a cloth tape, or a fine uneven shape such as a paper surface.

Further, as another example of the close contact portion, the adhesiveness of the foam heat insulating material can be increased by devising a coating agent on the surface 14a of the tape. In general, the surface 14a of the tape has a release agent, but in the second embodiment, by using a coating agent that does not contain silicon and fluorine that have low adhesion to urethane, which is a foam heat insulating material, An adhesion portion can be formed on the surface 14a of the tape.

[Example 1]
Here, an example (Example 1) of the heat insulation panel 20 according to the second embodiment configured as described above will be described. In the heat insulation panel 20 of Example 1, cloth tape is used as the adhesive member 4.

In the heat insulating panel 20 of Example 1, the thickness t2 of the inner dimension of the heat insulating panel 20 was 15 mm, whereas the thickness t1 of the vacuum heat insulating material 3 was 8 mm. That is, the thickness t1 of the vacuum heat insulating material 3 was equal to or greater than ½ of the thickness t2 of the heat insulating panel 20.

Further, in the heat insulating panel 20 of Example 1, the distance Δt = t2-t1 from the vacuum heat insulating material 3 to the back surface material 2 of the heat insulating panel 20 is 15 mm-8 mm = 7 mm, and a very thin urethane foam having a Δt of 10 mm or less. Although it was a layer, a concave portion or the like was not generated, and appearance deformation could be prevented.

In addition, in the heat insulation panel 20 of the said Example 1, (DELTA) t was a thing of 10 mm or less, However, When it experimented, even if (DELTA) t is a thing of 10 mm or more and 20 mm or less, an unevenness | corrugation is on the surface of the heat insulation panel 20. It did not occur and the appearance deformation could be prevented. On the other hand, when a normal aluminum tape was used as the adhesive member 4, the surface was deformed even when Δt was 10 mm or more and 20 mm or less.

[Effect of insulation panel]
In the heat insulating panel 20 according to the second embodiment configured as described above, even if the surface 4a of the adhesive member 4 is exposed to the vacuum heat insulating material 3, an adhesion portion is formed on the surface 4a of the tape. Therefore, the surface 4a and the urethane foam can be in direct contact with each other, and deformation of the appearance can be prevented.

[Modification 1]
Next, the heat insulation panel of the modification 1 in this Embodiment 2 is demonstrated.

FIG. 6 is a cross-sectional view of the heat insulation panel of Modification 1 according to Embodiment 2 of the present invention.

As shown in FIG. 6, the heat insulation panel 20 of the modification 1 in this Embodiment 2 has the same basic configuration as the heat insulation panel 20 according to Embodiment 2, but the vacuum heat insulating material 3 is a foamed phenol foam 15. The point which is covered and formed, the point which the surface material 1 and the back surface material 2 are not arrange | positioned, and the point which forms the heat insulation panel without using the surface material 1 and the back surface material 2 differ.

Specifically, in the first modification, the foamed phenol foam 15 is used as the foam heat insulating material. In addition, as a foaming heat insulating material, you may use a foaming polypropylene etc., for example.

Even the heat insulation panel 20 of the first modification configured as described above has the same effects as the heat insulation panel 20 according to the second embodiment.

In addition, as a result of manufacturing the heat insulation panel which takes the structure of the heat insulation panel 20 of the said modification 1, these inventors etc. are the one main surface of the heat insulation panel 20, and the outer surface of the fin part 11 in the vacuum heat insulating material 3. Even when the distance Δt between them is 20 mm or less, it has been confirmed that the surface of the heat insulation panel does not have irregularities and the appearance deformation can be prevented.

From the above description, many modifications and other embodiments of the present invention are apparent to persons skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the scope of the invention. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment.

Since the heat insulation panel of the present invention can maintain heat insulation performance for a long period of time and can reduce the total thickness, it can be used as a building material panel for buildings such as houses, in addition to refrigerators, vending machines, hot water supply containers, It can also be used for applications such as automotive insulation, cold insulation / heat insulation boxes.

DESCRIPTION OF SYMBOLS 1 Surface material 2 Back surface material 3 Vacuum heat insulating material 4 Adhesive member 4a Surface 5 Urethane foam 6 Moisture absorbent 7 Gas adsorbent 8 Core material 9 Jacket | cover material 9a 1st laminated film 9b 2nd laminated film 10 Storage container 11 Fin part 12 Fin fixing part 13 1st part 14 2nd part 15 Foamed phenol foam 20 Thermal insulation panel

Claims

A heat insulation panel comprising at least a vacuum heat insulating material and a foam heat insulating material,
The vacuum heat insulating material is vacuum-sealed with a core material covered with a jacket material,
The thickness of the vacuum heat insulating material is 1/2 or more of the thickness of the heat insulating panel,
The vacuum heat insulating material has a fin fixing portion in which a fin portion which is a peripheral portion is folded and fixed to the center side of the vacuum heat insulating material,
The said fin part is the heat insulation panel currently fixed with the adhesive member arrange | positioned at the inner surface of this fin part.
A heat insulation panel comprising at least a vacuum heat insulating material and a foam heat insulating material,
The vacuum heat insulating material is vacuum-sealed with a core material covered with a jacket material,
The thickness of the vacuum heat insulating material is 1/2 or more of the thickness of the heat insulating panel,
The vacuum heat insulating material has a fin fixing portion in which a fin portion which is a peripheral portion is folded and fixed to the center side of the vacuum heat insulating material,
The fin portion is fixed with an adhesive member from the outer surface of the fin portion,
The surface of the said adhesive member is a heat insulation panel which has a close_contact | adherence part with sufficient adhesiveness with the said foam heat insulating material.
The heat insulation panel according to claim 1, wherein the adhesive member is a hot melt adhesive.
The heat insulation panel according to claim 1, wherein the adhesive member is a double-sided tape.
The heat insulation panel according to claim 2, wherein the adhesive member is a tape, and a close contact portion is provided on an outer surface side of the tape.
The heat insulating panel according to claim 5, wherein the contact portion is formed in a shape having irregularities.
The heat insulating panel according to any one of claims 1 to 6, further comprising a front surface material and a back surface material arranged so as to sandwich the vacuum heat insulating material or the foamed heat insulating material.