JP2013204255A - Vacuum insulating panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum insulating panel with increased freedom of design.SOLUTION: A vacuum insulating panel with vacuum insulating materials stored inside foam comprises: plate-like foam having a plurality of vacuum insulating material storing chambers to store vacuum insulating materials; and a plurality of vacuum insulating materials stored in the vacuum insulating material storing chambers. The plate-like foam is made of rigid resin foam which has compressive strength of 0.3 MPa or larger, bending strength of 0.6 MPa or larger and density of not less than 35 kg/mand not more than 150 kg/m.

Description

  The present invention relates to a vacuum heat insulating panel, and more particularly to a vacuum heat insulating panel in which a vacuum heat insulating material is accommodated in a foam.

In recent years, energy saving is strongly desired from the viewpoint of global warming, and energy saving is an urgent issue for buildings as well.
A heat insulating material made of a general resin foam can achieve a heat insulating property up to about 0.02 W / m · K, but this value is almost the limit for this type of heat insulating material, especially in cold regions. It is difficult to achieve the heat insulation performance required for buildings in extremely hot regions.
For this reason, when desired heat insulation performance is exhibited with this type of heat insulating material, it may be necessary to add not only the inner wall but also external heat insulation, which may cause the need to install the heat insulating material thickly. .
On the other hand, as shown also in the following Patent Document 1, the use of a vacuum heat insulating material superior in heat insulating performance as compared with a general resin foam for heat insulation of a building has been studied, By using the vacuum heat insulating material, the heat insulating performance can be improved as compared with the conventional one while suppressing the thickness of the heat insulating material.

However, in the following Patent Document 1, a plurality of body edges are disposed, a prescribed number of vacuum heat insulating materials are attached thereto, and a time-consuming method such as attaching a foam separately to a place where the vacuum heat insulating material cannot be attached. Is adopted, and there is a problem in workability.
In order to solve such a problem, as described in Patent Documents 2 and 3 below, use of a vacuum heat insulating panel in which a vacuum heat insulating material is accommodated in a plate-like foam made of a resin foam has been studied.

By the way, as a vacuum heat insulating material, a porous core material is generally sealed under reduced pressure in an exterior material such as a bag made of a gas-impermeable sheet.
Accordingly, when the vacuum heat insulating material has a hole in the exterior material, the degree of vacuum inside is reduced and the heat insulating property is greatly reduced.
In other words, the vacuum heat insulating panel in which the vacuum heat insulating material is accommodated in the foam can handle the vacuum heat insulating material and the foam as one body and has good workability, and the vacuum heat insulating material is foamed. Since it is protected to some extent by the body, it is possible to suppress the risk of the vacuum heat insulating material being damaged during construction and reducing the degree of vacuum.

On the other hand, as the core material, a material having a higher specific gravity than a resin foam such as ceramic powder is used. For example, in the case of a large size of 910 mm × 1820 mm, which is called a so-called 3 × 6 (sub-rock) size, when two workers try to carry with both ends in the longitudinal direction, There is a risk that it will be greatly bent by the mass, or in some cases it will break at the center.
In addition, when installing a vacuum heat insulation panel in an inner wall formed of a frame material with a thickness of about 4 cm and a width of about 10 cm as in a two bar four house, the installation space has a depth of about 10 cm, a width of several tens of cm, and a height of several meters. The vacuum insulation panel will be placed vertically. If the vacuum insulation panel has a thickness of about 5 cm, for example, and there will be an extra space in the installation space, the vacuum insulation panel will be solidified by some method. If it is not fixed to the inner wall, the inner wall may be greatly bent.

It can be considered that a vacuum heat insulating material using a lightweight core material to prevent such a situation is accommodated in a foam to form a vacuum heat insulating panel, or the size of the vacuum heat insulating panel is limited. Such a restriction is not preferable for the side using the vacuum heat insulation panel.
In other words, the conventional vacuum heat insulation panel simply accommodates the vacuum heat insulating material in the foam and is not considered in terms of strength, and there is a possibility that the method of use is limited.

JP 2010-261157 A JP 2009-236183 A JP 2005-282840 A

  This invention makes it a subject to solve the above problems, and makes the subject the provision of the vacuum heat insulation panel with a high design freedom.

The present invention relating to a vacuum heat insulating panel for solving the above-mentioned problems is a vacuum heat insulating panel in which a vacuum heat insulating material is accommodated in a foam, and a vacuum heat insulating material accommodating chamber for accommodating the vacuum heat insulating material. A plurality of formed plate-like foams and a plurality of vacuum heat insulating materials accommodated in the vacuum heat insulating material accommodation chamber, the plate-like foam has a compressive strength of 0.3 MPa or more, a bending strength of 0.6 MPa or more, It is characterized by being formed of a hard resin foam having a density of 35 kg / m ³ or more and 150 kg / m ³ or less.

According to the present invention, since the plate-like foam for accommodating the vacuum heat insulating material has a predetermined strength, the size of the vacuum heat insulating panel and the risk of being restricted by the vacuum heat insulating material to be accommodated can be suppressed.
That is, according to the present invention, it is possible to provide a vacuum heat insulation panel having a high degree of design freedom.

(A) The schematic perspective view which shows a vacuum heat insulating material. (B) The schematic front view which shows a vacuum heat insulating material. (C) Schematic sectional view showing a sectional structure of the vacuum heat insulating material (sectional view taken along line X-X ′ in FIG. 5B). (A) The schematic front view of a plate-shaped foam and a vacuum heat insulating material. (B) The schematic perspective view which showed a mode that a vacuum heat insulation panel was produced using a plate-shaped foam and a vacuum heat insulating material. (C) The schematic front view of a vacuum heat insulation panel. (A) The schematic front view which shows the vacuum heat insulation panel of 2nd embodiment. (B) The schematic sectional drawing which shows the cross-section of a vacuum heat insulation panel (X-X 'arrow sectional drawing of a figure (a)). (A) The schematic front view which shows the vacuum heat insulation panel of 3rd embodiment. (B) The schematic sectional drawing which shows the cross-section of a vacuum heat insulation panel (Y-Y 'arrow sectional drawing of a figure (a)). The schematic perspective view for demonstrating the heat insulation construction method. (A) The schematic front view which shows the vacuum heat insulation panel of Example 1. FIG. (B) ZZ schematic sectional drawing in Fig.1 (a). (A) The schematic front view which shows the vacuum heat insulation panel of Example 2. FIG. (B) ZZ schematic sectional drawing in Fig.1 (a).

Embodiments of the present invention will be described below with reference to the drawings.
The vacuum heat insulation panel of this embodiment has a plate-like shape in which a vacuum heat insulating material is accommodated in a foam.
Further, the vacuum heat insulation panel of the present embodiment includes a plate-like foam in which a plurality of vacuum heat insulating material accommodation chambers for accommodating the vacuum heat insulating material are formed, and a plurality of vacuum heat insulations accommodated in the vacuum heat insulating material accommodation chambers. The plate-like foam is formed of a hard resin foam having a compressive strength of 0.3 MPa or more, a bending strength of 0.6 MPa or more, and a density of 35 kg / m ³ or more and 150 kg / m ³ or less.

First, the vacuum heat insulating material used for the vacuum heat insulation panel of this embodiment is demonstrated.
FIG. 1A is a schematic perspective view showing a vacuum heat insulating material 10 used in the vacuum heat insulating panel of this embodiment, and FIG. 1B is a schematic front view of the vacuum heat insulating material 10.
And FIG.1 (c) is the schematic sectional drawing which showed the XX 'arrow cross section shown by the virtual line in FIG.1 (b).

As shown in this sectional view, the vacuum heat insulating material (reference numeral 10) includes a core material (reference numeral 11) and a gas-impermeable exterior material (reference numeral 12) for sealing the core material under reduced pressure. The overall shape is a rectangular plate.
The core material in the present embodiment is not particularly limited, but it is usually possible to employ a porous body having an air-layer ratio of about 90% processed into a sheet or plate, such as urethane foam, Conventionally known materials such as open cell bodies such as styrene foam and phenol foam, fiber bodies such as glass wool, rock wool, alumina fibers, silica alumina fibers and silica fibers, powders such as perlite, wet silica and dry silica are used. Can be used.

Further, the exterior material is not particularly limited, but a metal laminate film having a three-layer structure of surface protective layer / gas barrier layer / heat seal layer can be used, and a metal laminate film is used as the exterior material. In such a case, the heat seal layer is formed of a thermoplastic resin such as low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polyacrylonitrile, or a mixed resin thereof. Can do.
In addition, as the metal laminate film, a film in which the gas barrier layer is formed by a metal foil such as an aluminum foil or a copper foil, or a vapor deposition film of metal atoms such as aluminum or copper can be employed.
Furthermore, as the metal laminate film, a film in which the surface protective layer is formed of a polyamide film, a polyethylene terephthalate film, a polypropylene film, or the like can be employed.

  On the other hand, acrylic resin foam, polyurethane resin foam, polystyrene resin foam, phenol resin foam, polyvinyl chloride resin foam, etc. can be adopted as the hard resin foam that forms the plate-like foam. From the viewpoint of strength, a polyvinyl chloride resin foam and an acrylic resin foam are preferable, and an acrylic resin foam is more preferable from the viewpoint of safety during combustion.

When the foam conventionally used in this respect is concretely demonstrated, when compared with the foam of the comparable density, it is about 0.18 MPa, for example in a phenol resin foam.
And it is about 0.35 MPa with a polystyrene resin foam having a relatively high strength, and about 0.49 MPa with a polyvinyl chloride resin foam.
On the other hand, if the acrylic resin foam has, for example, the same density (expanding ratio of about 25 times) and a closed cell ratio of 80% or more, the 5% compression stress becomes 0.35 MPa or more, If it has an expansion ratio of about 10 times and a closed cell ratio of 80% or more, 5% compression stress of 1.5 MPa or more can be exhibited.

In order to exhibit such excellent strength more reliably, as the acrylic resin foam, methyl methacrylate 50 mass% to 70 mass%, (meth) acrylic acid 14 mass% to 30 mass%, and It is preferable to employ a polymerized solution containing a monomer mixture containing 10% by mass or more and 20% by mass or less of styrene and a foaming agent composed of urea or a urea derivative.
“(Meth) acrylic acid” contained in the monomer mixture means “acrylic acid” or “methacrylic acid”. In the monomer mixture, only acrylic acid is used alone. Or methacrylic acid alone, or both acrylic acid and methacrylic acid.
As described above, the content of “(meth) acrylic acid” in the monomer mixture is preferably 14% by mass or more and 30% by mass or less, and “(meth) acrylic acid” is “acrylic”. In the case where both the “acid” and “methacrylic acid” are contained in the monomer mixture, the total amount thereof is preferably within the above range.
Specific embodiments will be described below, but the present invention is not limited thereto.

(First embodiment)
Below, 1st embodiment of the vacuum heat insulation panel of this invention is described, referring FIG.
2A is a schematic front view showing the vacuum heat insulating material 10 and the plate-like foam 20 constituting the vacuum heat insulating panel 1 of this embodiment, and FIG. 2B is the vacuum heat insulating material 10. The step of accommodating the vacuum heat insulating material 10 in the plate-like foam 20 in which the through-hole 20a serving as the vacuum heat insulating material accommodating chamber for housing the vacuum heat insulating panel 1 is formed is a part of the plate-like foam 20. It is the schematic perspective view expanded and shown.
Moreover, FIG.2 (c) is the schematic front view which showed a mode that the vacuum heat insulation panel 1 completed by the process of FIG.2 (b) was installed vertically.
In the present embodiment, as shown in FIG. 1, a bag body 12 made of a gas-impermeable aluminum laminate film is employed as the exterior material of the vacuum heat insulating material 10.

In addition, as the said vacuum heat insulating material 10 of this embodiment, what the core material 11 sealed under reduced pressure inside the bag body 12 is used.
The core material 11 is a rectangular plate-shaped porous body having a substantially square outline shape in plan view.
The bag body 12 has an internal volume that can accommodate the core material 11, and more specifically, is wider than the length of one side of the core material 11 that is substantially square in plan view, and the length of the one side. A rectangular aluminum laminate film having a length more than twice the length is half-folded with the heat seal layer facing inward in the form of a crease at the center in the longitudinal direction, and one side and the other through the crease The two sides of the three sides excluding the crease are heat-sealed by heat-sealing to form a bag shape.
And the said vacuum heat insulating material 10 accommodates the said core material 11 in the inside of this bag body from the opening location where the heat sealing of the said bag body 12 is not carried out, and evacuates the inside, and this opening location is made into other 2 sides. The core material is sealed under reduced pressure in the bag body by heat-sealing in the same manner as described above.

Therefore, in the vacuum heat insulating material 10 of this embodiment, the palm seal 12a formed by heat-sealing the aluminum laminate film in a palm state is formed on three side surfaces of the four side surfaces, The joint seal 12 a is formed so as to protrude outward from the outer edge of the sealed portion of the core member 11.
That is, the vacuum heat insulating material of the present embodiment has a joint seal 12 a outside the sealed portion of the core material 11, so that the shape in plan view is a rectangle that is slightly larger than the core material 11. Yes.

In place of the rectangular aluminum laminate film as described above, for example, two aluminum laminate films having a square shape slightly larger than the core material 11 are stacked with the heat seal layer facing inward, A bag body obtained by opening and sealing the remaining three sides can also be used as an exterior material for a vacuum heat insulating material in the same manner as the bag body 12 shown in the figure.
In this case, the vacuum heat insulating material obtained by sealing the opening portion is formed with a palm seal over the entire circumference outside the sealed portion of the core material. Since it is formed of two aluminum laminate films, the protruding joint seal 12a can be folded along the core housing portion and used, and there is little possibility of causing a practical problem.

In the present embodiment, the plate-like foam body 20 having a vertically long rectangular shape in plan view having a plurality of rectangular through holes 20a that are slightly larger than the core material 11 so as to accommodate the vacuum heat insulating material 10 in a state where the palm seal 12a is folded. And the vacuum heat insulation panel 1 is comprised by the several vacuum heat insulating material 10 accommodated in the through-hole 20a of this plate-shaped foam 20. FIG.
More specifically, the vacuum heat insulation panel 1 of the present embodiment includes a total of six through-holes 20a, three in the vertical direction and two in the horizontal direction, and has a thickness equal to or greater than that of the vacuum heat insulating material 10. Plate-like foam body 20 (hereinafter also referred to as “plate-like frame material 20x”), and the vacuum heat insulating material 10 is accommodated in each through-hole 20a of the plate-like foam body 20. Is formed.

That is, the plate-like frame member 20x in the present embodiment includes six rectangular frame-like outer frame portions 20b that define the outline shape of the plate-like frame member 20x in plan view, and six spaces inside the outer frame portion 20b. The crosspiece 20c is divided into a vertical crosspiece 20c1 extending in the vertical direction to partition the space left and right, and two pieces that divide the space into upper, middle, and lower three stages. And a horizontal crosspiece c2.
The plate-like frame member 20x is not separated from the outer frame portion 20b and the crosspiece portion 20c, and has a compressive strength of 0.3 MPa or more, a bending strength of 0.6 MPa or more, and a density of 35 kg / m ^3. The outer frame portion 20b and the crosspiece portion 20c are integrally formed by punching a single plate-like acrylic foam board having a characteristic of 150 kg / m ³ or less to form the through hole 20a. It has become a thing.
In this embodiment, since the vacuum heat insulating material 10 is accommodated in the plate-shaped frame member 20x having such strength, a vacuum heat insulating panel having excellent strength can be obtained.

  In this embodiment, since the vacuum heat insulating material 10 is accommodated in the plate-shaped frame member 20x having such strength, a vacuum heat insulating panel having excellent strength can be obtained.

The “compressive strength” described in the present specification is intended to be a value measured by the method described in JIS K7220: 2006 “Rigid Foamed Plastic-Determination of Compression Properties”.
That is, five test pieces having a cross-section of 100 mm × 100 mm and a thickness of 50 mm were prepared, and 10% compression was performed using a Tensilon universal testing machine UCT-10T (manufactured by Orientec Co., Ltd.) with a compression speed of 5 mm / min. Three compressive strengths measured at the time of 5% compression are calculated based on the following formula, and three of the five test pieces are excluded from the test piece showing the maximum value and the test piece showing the minimum value. The compressive strength of the test piece can be obtained by arithmetic averaging.

σ ₅ = F ₅ / A ₀ × 10 ³

σ ₅ : Compression strength (kPa)
F ₅ : Maximum force reached within a deformation rate of 5% (N)
A ₀ : Initial cross-sectional area of the test piece (mm ² )

Further, the “bending strength” is intended to be a value measured by the method described in JIS K7222-1: 2006 “Hard foamed plastic—bending test—Part 1: Determination of deflection characteristics”.
That is, a support base provided with two fulcrum points with a 5R roundness at the upper end and separated by a distance of 100 mm is set on a Tensilon universal testing machine UCT-10T (manufactured by Orientec Co., Ltd.), and the center between the fulcrum points Set the pressure wedge with the lower end processed to 5R above the part, and place the test piece of width 25mm x length 120mm x thickness 20mm on the support base so that the surface of 25mm x 120mm is the upper surface side The “bending strength” can be obtained by the following equation based on the result of three-point bending by pressing the test body from the upper surface side with the pressure wedge at a speed of 10 mm / min. it can.
In addition, the said bending strength can be calculated | required by measuring about 5 test bodies and calculating the average value of 3 test bodies except the minimum value and the maximum value.

R = (1.5FR × L / bd ² ) × 10 ⁶

R: Bending strength (kPa)
FR: Maximum load (kN)
L: Distance between fulcrums (mm)
b: Width of test piece (mm)
d: Test piece thickness (mm)

Furthermore, “density” intends a value measured by the method described in JIS K 7222: 2005 “Foamed Plastics and Rubber—How to Obtain Apparent Density”.
That is, a test piece of 100 cm ³ or more can be cut so as not to change the original cell structure of the material, the mass thereof can be measured, and the following equation can be calculated.

Density (kg / m ³ ) = Test piece mass (g) / Test piece volume (mm ³ ) × 10 ⁶

In addition, the test piece for measurement uses what was left to stand for 16 hours or more on the atmospheric condition of temperature 23 +/- 2 degreeC and humidity 50 +/- 5%.

In the present embodiment, the plate-like frame member 20x used to constitute the plate-like foam 20 is formed in a vertically long rectangle as shown in the figure, and the size thereof is 425 mm in the vertical direction. It is preferably 2500 mm or less and the lateral dimension is 210 mm or more and 1200 mm or less.
The thickness of the plate-like frame member 20x is preferably 4 mm or more and 75 mm or less. As the plate-like foam 20, the plate-like frame member 20x may be a single or a plurality of laminated plate-like frame members. It is preferable that the vertical and horizontal dimensions are the same as 20x and the thickness is 10 mm or more and 100 mm or less.
In addition, it is preferable that the plate-like foam 20 has the above-mentioned size. For a plate-like foam smaller than the above range, one having a relatively high specific gravity among general vacuum heat insulating materials is selected. This is because the problem itself that the obtained vacuum heat insulation panel is bent by its own weight hardly occurs even if it is accommodated in the through hole.
Moreover, it is preferable that the plate-like foam 20 has the above-mentioned size even if the vacuum heat-insulating panel is formed using a large plate-like foam exceeding the above range. This is because panels have a narrow range of use in ordinary buildings and may be difficult to handle.
That is, it is preferable that the plate-like foam 20 has the above-mentioned size in order to exhibit the effect of the present invention more remarkably, and the plate-like foam having the above-mentioned size is used. This is because it is easy to obtain a vacuum heat insulation panel having excellent strength, easy handling, and a wide range of use.

Moreover, it is preferable that the plate-like foam 20 is provided with a plurality of the through holes separated from each other by a distance of 5 mm or more.
That is, it is preferable that the vertical beam portion 20c1 and the horizontal beam portion 20c2 have a formation width of 5 mm or more in a front view.
In addition, it is preferable that the crosspiece 20c of the plate-like foam 20 is 5 mm or more because, if the crosspiece 20c is less than 5 mm, there is a risk of breakage when the vacuum heat insulating material 10 is accommodated. .
On the other hand, if the crosspiece 20c is excessively wide, the proportion of the vacuum heat insulating material is reduced, and it may be difficult to sufficiently exhibit the heat insulating properties required for the vacuum heat insulating panel.
From this, the width of the crosspiece 20c (distance between adjacent through holes 20a) is preferably 100 mm or less, more preferably 50 mm or less in consideration of heat insulation and workability.
In the present embodiment, by using the hard resin foam as described above as the material for forming the plate-like foam 20, it is possible to form the crosspiece 20c having a width of about 5 mm which is the lower limit value. The ratio of the vacuum heat insulating material to the whole can be improved.
Furthermore, the plate-like foam 20 of the present embodiment preferably has an outer frame 20b having a width of 10 mm or more, and considering the workability such as nailing, the outer frame 20b has a width of 50 mm to 150 mm. More preferably.

In the present embodiment, since the plate-like foam 20 is composed only of the plate-like frame member 20x, the vacuum heat insulating material accommodation chamber for accommodating the vacuum heat insulating material is both front and back surfaces of the plate-like foam 20. It is formed by the through-hole 20a that is open to the top.
Therefore, in this embodiment, in order to prevent the vacuum heat insulating material from dropping from the vacuum heat insulating material accommodation chamber, the side surface portion of the vacuum heat insulating material 10 is bonded to the side surface portion of the outer frame portion 20b or the crosspiece portion 20c. It is fixed and accommodated in the through hole 20a.
That is, in the vacuum heat insulating panel 1 of the present embodiment, the vacuum heat insulating material 10 protects the side surface portion with the hard resin foam.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
In the vacuum heat insulation panel of the first embodiment, the plate-like foam 20 is constituted by only one plate-like frame member 20x. However, in this embodiment, two plate-like frame members 20x ′, This is different from the first embodiment in that a plate-like foam 20 for accommodating a vacuum heat insulating material is formed by stacking 20x ″.
These plate-like frame members 20x ′ and 20x ″ are substantially the same as those described above, except that the size of the through-hole 20a ′ formed is slightly larger than that of the core member 11. It is formed similarly to the plate-like frame member 20x of the embodiment.
Further, the plate-like frame members 20x ′ and 20x ″ in the second embodiment are formed to have the same shape as the plate-like frame member 20x of the first embodiment when the outer peripheral edges are aligned and laminated. Yes.
That is, in the present embodiment, one plate-like frame member 20x can be formed by two plate-like frame members 20x ′, 20x ″, and the two plate-like frame members 20x ′, 20x ”are formed. "" Makes the through holes 20a 'common to each other.
In addition, it is the same as that of 1st embodiment also in the point which one through-hole 20a formed by mutually overlapping through-hole 20a 'becomes a vacuum heat insulating material accommodation chamber.

In the second embodiment, since the two plate-like frame members 20x are stacked and used, when the vacuum heat insulating material 10 having the joint seal 12a as described above is used, as in the first embodiment. There is no need to use the joint seal 12a in a folded state. Rather, the joint seal 12a is left in an outwardly projecting state, and the joint seal 12 is attached to the two plate-like frame members 20x. It can be used for fixing the vacuum heat insulating material 10 to the plate-like foam 20 by being sandwiched between them.
That is, as shown in FIG. 3, the total thickness of the two plate-like frame members 20x ′ and 20x ″ is equal to or greater than the thickness of the vacuum heat insulating material 10, and one plate-like frame member 20x ′ is connected to the joint seal 12a. By making the thickness of the other plate-shaped frame member 20x ″ more than the thickness from the formation position of the palm seal 12a to the back surface of the vacuum heat insulating material 10, It is possible to prevent the vacuum heat insulating material 10 from protruding on both surfaces of the plate-like foam 20 obtained by laminating the two plate-like frame members 20x ′ and 20x ″, and the through hole as in the first embodiment. It can be set as the state which accommodated the vacuum heat insulating material 10 in 20a.

In the second embodiment, for example, the joint seal 12a and the plate-shaped frame members 20x ′ and 20x ″ are bonded using an adhesive such as a hot melt adhesive, a reaction curable adhesive, or a pressure sensitive adhesive. The vacuum heat insulating material 10 can be fixed inside the through hole 20a ′.
At this time, for example, an adhesive is applied to one side of each of the two plate-like frame members 20x ′ and 20x ″, and one plate-like frame member 20x ′ (hereinafter “first plate-like frame member 20x ′”) is applied. (Also referred to as “adhesive”) is placed on a table so that the adhesive application surface faces upward, and the core material sealing portion of the vacuum heat insulating material 10 is fitted into the through hole 20a of the first plate-like frame member 20x ′. After bonding one side of the joint seal 12a to the surface of the crosspiece around the hole, another plate-shaped frame member 20x ″ (hereinafter referred to as “the first plate-shaped frame member 20x ′) with the adhesive-coated surface facing downward. And the second plate frame material 20x ″ and the first plate frame material 20x ′ are bonded together, and the second plate frame material 20x ″ and the above What is necessary is just to adhere | attach the vacuum heat insulating material 10 using the said palm seal 12a.

In order to further strengthen the adhesive force between the plate-shaped frame members 20x ′ and 20x ″ and the joint seal 12a, the plate-shaped frame members 20x ′ and 20x ″ are more dense than the central portion in the thickness direction. Also, it is preferable to use one having a higher density of the surface layer portion.
In order to obtain such plate-like frame members 20x 'and 20x "whose surface layer part has a higher density than the central part, a high-density layer called a surface skin layer is formed on the surface layer part in a so-called resin foam board or resin foam sheet. It is sufficient to adopt a technique for making them.

The plate-like frame members 20x ′ and 20x ″ are made of an acrylic resin foam as described above and once formed into a plate-like body (acrylic foam board) in which the through holes are not formed, the plate-like body is punched. Can be formed by adopting a conventional method when the plate-shaped body is manufactured.
That is, when the acrylic resin foam is foamed in the mold, the surface skin layer can be formed by quenching the entire mold after foaming.
That is, the surface skin layer can be formed by making the density of the surface in contact with the mold higher than the inside.
Alternatively, the surface skin layer may be formed by applying pressure in the thickness direction during the production of the acrylic foam board or during the punching process.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.
The vacuum heat insulation panel 1 of this third embodiment forms a single plate frame member 20x by laminating a first plate frame member 20x ′ and a second plate frame member 20x ″, and the plate frame In the point which comprises the plate-shaped foam 20 for accommodating the vacuum heat insulating material 10 with the material 20x, it is the same as the vacuum heat insulating panel of 2nd embodiment.
On the other hand, in the vacuum heat insulation panel 1 of the third embodiment, the plate-like frame members 20x ′ and 20x ″ are sandwiched between two thin plate members 20y ′ and 20y ″ made of the same hard resin foam as the plate-like frame member. Second, in that the through-hole 20a is closed by the thin plate materials 20y ′ and 20y ″ on both sides of the plate-shaped frame member, and the vacuum heat insulating material accommodation chamber is closed. It is different from the vacuum heat insulation panel of the embodiment.

That is, the vacuum heat insulation panel 1 of the present embodiment includes a first thin plate material 20y ′ (hereinafter also referred to as “first thin plate material 20y ′”) in order from the front side toward the back side in FIG. A plate-like foam 20 having a four-layer structure of a first plate-like frame member 20x ′, a second plate-like frame member 20x ″, and a second thin plate member 20y ″ (hereinafter also referred to as “second thin plate member 20y ″”) is formed. Has been.
The thin plate materials 20y ′ and 20y ″ have the same size as the plate-shaped foam, and the thickness of one sheet is usually the plate-shaped foam formed by the thin plate material and the plate-shaped frame material. The thickness is less than ½ of the body, preferably not more than the thickness of the plate-like frame material.

  Although the vacuum heat insulation panel 1 of this embodiment becomes thick even if it uses the same vacuum heat insulation material compared with the vacuum heat insulation panel of 1st embodiment and 2nd embodiment, by said thin plate material 20y ', 20y' '. Since the vacuum heat insulating material storage chamber is a closed space, there is a low risk that the vacuum heat insulating material 10 will fall during transportation and the like, and the risk that the tool etc. will hit the vacuum heat insulating material and reduce its vacuum will be suppressed. Can do.

For fixing the thin plate members 20y ', 20y "and the plate-like frame members 20x', 20x", the surfaces may be joined using an adhesive, a double-sided tape, a hook-and-loop fastener, etc. You may make it fix with a staple in a side part using a tool.
Furthermore, the thin plate material and the plate-shaped frame material may be fixed so that nails, screws, rivets and the like are penetrated from the first thin plate material 20y ′ to the second thin plate material 20y ″.
That is, when an adhesive or double-sided tape is used, the vacuum insulation panel obtained because the thin plate member and the plate-like frame member can be joined using a large area can be made excellent in strength while being stapled. When using nails, screws, hook-and-loop fasteners, etc., the vacuum insulation panel can be easily disassembled as necessary, so the joining method between the thin plate and plate frame can be selected according to the application. do it.

  For example, in the case where an adhesive is applied to the surface of the thin plate material and bonded to the plate frame material, the thin plate material is also surface skin as in the case of the plate frame material in order to improve the adhesive strength. It is preferable to use a layer formed.

Next, the vacuum heat insulation panel of the third embodiment will be described by taking as an example a case where a vacuum heat insulation panel having a size of 910 mm × 1820 mm is produced.
First, a mold having an internal method of 910 mm × 1820 mm is prepared, and a polymerizable solution containing an acrylic monomer, a urea foaming agent, a polymerization initiator, etc. is poured into this, and the decomposition start temperature of urea (about 130 ° C.) After the acrylic monomer is polymerized at a lower temperature (for example, 50 to 80 ° C.) to form a foamable polymer, the foamable polymer is heated to a temperature higher than the decomposition start temperature of urea to An acrylic foam board having a surface skin layer of 910 mm × 1820 mm and a density of 35 kg / m ^{3 to} 150 kg / m ³ is produced.
Similarly, a total of four acrylic foam boards are produced, and two of them are formed into the plate-shaped frame members 20x ′ and 20x ″ by forming through holes 20a ′ by cutting or punching.
The remaining two sheets are used as the thin plate materials 20y ′ and 20y ″, and an adhesive is applied to one side (for example, the second thin plate material 20y ″), and the plate frame materials 20x ′ and 20x ″ are applied. 1 (for example, the second plate-shaped frame member 20x ″) and the outer edge are aligned and bonded together.
And the vacuum heat insulating material 10 is accommodated in through-hole 20a 'of this 2nd plate-shaped frame material 20x ".
At this time, an adhesive is applied to the joint seal 12a of the vacuum heat insulating material 10, and the joint seal 12a is adhered and fixed to the outer frame portion 20b and the crosspiece portion 20c of the second plate-like frame member 20x ″. preferable.
Thereafter, an adhesive is applied to one side of the remaining first plate-shaped frame member 20x ′, and the second plate-shaped frame member is formed so that the adhesive-coated surface becomes an adhesive surface with the second plate-shaped frame member 20x ″. Adhere to 20x ".
At this time, the joint seal 12a of the vacuum heat insulating material 10 is bonded and fixed also to the first plate-like frame member 20x ′.
And the vacuum insulation panel 1 of 3rd embodiment can be produced by adhere | attaching and fixing the remaining 1st thin plate material 20y '.

  If the surface strength of the vacuum heat insulating panel 1 to be obtained is not so important, the thin plate members 20y ′ and 20y ″ may have a surface skin layer only on the side of the surface to be bonded to the plate-like frame member. For example, one acrylic foam board having a surface skin layer formed on both sides may be divided into two in the thickness direction by a slicer and used as two thin plates.

Also, here, the use of an acrylic foam board as a plate-like frame material or thin plate material is exemplified, but if the plate-like frame material or thin plate material has a predetermined strength, the material is made of an acrylic resin foam. It is not limited to the body.
Although not described in detail here, the thin plate material is not limited to the resin foam, and may be a non-foamed resin sheet, paper, or the like.

In addition, as long as the vacuum heat insulation panel 1 which concerns on these embodiment has produced the acrylic foam board etc. beforehand, the operation | work which forms a through-hole in this acrylic foam board is the construction site which performs heat insulation construction. It can be implemented and can be produced by a simple method.
Therefore, it is possible to produce a vacuum heat insulation panel while confirming whether the vacuum heat insulating material 10 is normal because the vacuum heat insulating material 10 can be accommodated in the plate-like foam 20 at the construction site. Walls and floors with excellent heat insulation can be reliably formed.

(Other cases)
In addition, various aspects other than the said illustration can be employ | adopted for this invention.
For example, the plate-like foam does not have to be a rectangular plate shape, and may be a triangle, a pentagon or more polygon, a circle, an L shape, or any combination thereof.
Further, in the present embodiment, the plate-like foam that accommodates the vacuum heat insulating material is formed by combining planar members such as a plate-like frame material and a thin plate material. It is also possible to produce a vacuum heat insulation panel as shown in the third embodiment by producing two three-dimensional structures in which the plate frame material and the thin plate material in the third embodiment are combined.
Furthermore, even in matters not directly described above, conventionally known matters relating to the vacuum heat insulating material, the resin foam, the vacuum heat insulating panel, etc. can be adopted in the present invention.

(Insulation method)
It can be said that the vacuum heat insulation panel of this embodiment is useful for the heat insulation construction method as shown in FIG. 5, for example.
FIG. 5 is a diagram showing the heat insulation method for the inner wall. Reference numeral 100 represents a vertical frame, and reference numeral 110 represents a plywood lined on the vertical frame 100.
And the vacuum heat insulation panel 1 obtained by this embodiment is vertically installed and used between the said vertical frames.

At this time, for example, the building is formed by 2 × 6 (two-by-six) construction method, the thickness of the vertical frame 100 from the plywood 110 is 140 mm, and the thickness of the vacuum heat insulation panel 1 is determined from the required heat insulation performance. When it is about 50 mm, an extra space of 90 mm is formed inside.
Then, if it is a conventional vacuum heat insulation panel, the vacuum heat insulation panel will be greatly bent without any padding, and the vacuum heat insulation material may bend and a space is formed inside, which may deteriorate the heat insulation performance. In the embodiment, since the plate-like foam containing the vacuum heat insulating material has excellent strength, the occurrence of bending can be suppressed.
In addition, even when using the vacuum heat insulation panel of the present embodiment, it is the same in that it is preferable to stabilize the upright state by stuffing when a large gap is formed, and the present invention denies the stuffing. It is not a thing.

Moreover, since the vacuum heat insulation panel of this embodiment is also suppressed about the bending | flexion at the time of conveyance, it can suppress that a vacuum heat insulating material bends at the time of conveyance, and reduces heat insulation performance.
Therefore, it is effective not only in the wall but also in the case of use for floor insulation such as a joisting room and a large drawing room.
Moreover, the vacuum heat insulation panel of this embodiment can be arranged in multiple numbers not only under the floors, such as joists and large draws, but in the ceiling, and can form the heat insulation structure of a building.
For example, in the case of a framed building, it can be arranged between rafters, beams, columns, studs, and the like.
In addition, if the building is based on a wooden framework wall construction method such as the above-mentioned two-by six or two-by-four, it can be used for other than the inner wall, and a plurality of frames can be arranged between the frame members to form a heat insulating structure on the floor, ceiling, outer wall, etc. .

  Moreover, the vacuum heat insulation panel obtained by the manufacturing method of the present embodiment can be used by being embedded in the soil concrete of a building having underfloor heating in which a heater is embedded between concrete soils. Is available.

Next, specific examples of the present invention will be described.
(Production of hard resin foam)
1. Preparation of polymerizable solution 62 parts by weight of methyl methacrylate, 23 parts by weight of methacrylic acid, 15 parts by weight of styrene, 0.48 parts by weight of polymerization initiator t-butyl hydroperoxide, 0.04 parts by weight of cetyltrimethylammonium chloride, calcium formate A polymerizable monomer mixed solution consisting of 0.15 parts by mass, sodium sulfate 0.58 parts by mass, N, N-dimethylaniline 0.48 parts by mass, and blowing agent urea 5 parts by mass was heated and stirred at 35 ° C.
Thereafter, a polymerizable solution was prepared by removing residual inorganic salts.

2. Production of Expandable Polymer 15 kg of the polymerizable solution was placed in a Teflon rectangular parallelepiped mold having an internal method of 2.5 cm × 100 cm × 50 cm.
The mold is sandwiched between hot plates of metal cuboid designed to circulate hot water inside, 56.0 ° C for 4.5 hours, 50.0 ° C for 20 hours, and 58.5 ° C for 9 hours. A foamable polymer (resin density 1150 kg / m ³ ) was obtained by heating for a period of time.

3. Preparation of Acrylic Resin Foam The foamable polymer is placed in a 100 cm × 200 cm × 7 cm mold and heated stepwise at 140 ° C. for 60 minutes and 170 ° C. for 40 minutes to form a foaming agent in the resin. Was decomposed to obtain an acrylic resin foam.

When the “compressive strength”, “bending strength”, and “density” were measured on the acrylic resin foam, the following results were obtained.
Compressive strength: 2.17 MPa
Bending strength: 2.75 MPa
Density: 98kg / m ³

Example 1
Two pieces of plate-like frame material in which a total of nine through-holes of 900 mm square, 5 mm thickness and 250 mm square, 3 in the vertical direction and 3 in the horizontal direction are arranged by the previous acrylic resin foam And two thin plate materials of 900 mm square and 10 mm thickness.
A vacuum heat insulation panel having the same configuration as that exemplified in the third embodiment as shown in FIG. 6 was prepared in such a manner that nine vacuum heat insulation materials of 250 mm square and 10 mm thickness were accommodated therein.
Note that the width of the outer frame portion of the plate-shaped frame member was 45 mm, and the width of the crosspiece portion was 30 mm.
The total mass of the obtained vacuum heat insulation panel was 2.8 kg, and in order to investigate the heat insulation performance, when the heat transmissivity was measured, the heat transmissivity was 0.74 W / m ² · K.

In addition, the "heat transmissivity" described in this specification is a value measured according to the method of Appendix B of JIS A 1420 (Measurement method of thermal insulation of building components-calibration heat box method and protective heat box method). Say.
Specifically, it is the value measured by producing a vacuum heat insulation panel of 900 mm (length) × 900 mm (width) × 30 mm (thickness) under the following conditions.
<Test conditions>
Heat flow direction: Upward set temperature: Air in heating box 35 ° C
Air in constant temperature room 15 ℃
Airflow: Heating box side 0.5 m / s or less
Constant temperature side natural convection

(Example 2)
When the above acrylic resin foam is foamed in the mold, the surface skin layer (surface density 146 kg / m ³ , center density 98 kg / m) is obtained by quenching the mold with the cold water at 10 ° C. after foaming. ³ ) The plate frame material is formed with a width of the outer frame portion (vertical 100 mm × width 57 mm) and a crosspiece width (vertical 60 mm × width 40 mm). It is assumed that a total of 20 through holes of 130 mm × width 125 mm are arranged in the vertical direction and 5 in the horizontal direction, and the vacuum heat insulating material 20 having a length of 130 mm × width 125 mm, thickness 10 mm. A vacuum heat insulating panel as shown in FIG. 7 was produced in the same manner as in Example 1 except that the sheet was used.
The total mass of the obtained vacuum heat insulation panel was 3.1 kg, and the heat permeability was 0.73 W / m ² · K.

The vacuum heat insulation panels according to these examples were less bent and excellent in strength.
Therefore, according to this invention, it turns out that it can suppress that the kind of vacuum heat insulating material to accommodate, the size of the said vacuum heat insulation panel, etc. are restrict | limited from an intensity | strength surface.

DESCRIPTION OF SYMBOLS 1 Vacuum heat insulation panel 10 Vacuum heat insulating material 11 Core material 12 Bag body 12a Joint seal 20 Plate-shaped foam 20x Plate-shaped frame material 21a Through-hole

Claims (5)

A vacuum heat insulation panel in which a vacuum heat insulating material is accommodated in a foam,
A plate-like foam in which a plurality of vacuum heat-insulating material accommodating chambers for accommodating the vacuum heat-insulating material are formed; and a plurality of vacuum heat-insulating materials accommodated in the vacuum heat-insulating material-containing chamber, A vacuum heat insulating panel formed of a hard resin foam having a compressive strength of 0.3 MPa or more, a bending strength of 0.6 MPa or more, and a density of 35 kg / m ³ or more and 150 kg / m ³ or less.   A plate-shaped frame member having a plurality of through holes serving as the vacuum heat insulating material accommodation chamber and formed in a rectangular shape by the hard resin foam is used. The vertical dimension is 425 mm or more and 2500 mm or less, and the lateral dimension is 210 mm or more. The plate-like foam is formed by laminating a single or a plurality of the plate-like frame members having a thickness of 1200 mm or less, a thickness of 4 mm or more and 75 mm or less, and a plurality of the through holes spaced apart from each other by 5 mm or more. The vacuum insulation panel according to claim 1, wherein a body is formed, and the plate-like foam is formed in a rectangular shape having a vertical dimension of 425 mm to 2500 mm, a horizontal dimension of 210 mm to 1200 mm, and a thickness of 10 mm to 100 mm.   The plate-like foam has a sandwich structure in which the plate-like frame member is sandwiched between two thin plate members having a thickness less than ½ of the plate-like foam, and the through hole is formed in the plate-like frame. The vacuum heat insulation panel according to claim 2, wherein the vacuum heat insulation material accommodation chamber is closed by being closed with the thin plate material on both surfaces of the material.   A monomer mixture containing the hard resin foam in an amount of 50 to 70% by weight of methyl methacrylate, 14 to 30% by weight of (meth) acrylic acid, and 10 to 20% by weight of styrene; The vacuum heat insulation panel according to any one of claims 1 to 3, which is an acrylic resin foam obtained by polymerizing and foaming a polymerizable solution containing a foaming agent made of urea or a urea derivative.   The plate-shaped frame material is formed at least by the acrylic resin foam, and the plate-shaped frame material is provided with a plate-shaped frame material having a density of a surface layer portion higher than a density of a central portion in a thickness direction. Item 5. The vacuum insulation panel according to Item 4.

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