JP6414381B2 - Heat insulating material, method for manufacturing heat insulating material, and combination of article and heat insulating material - Google Patents

Description

  The present invention relates to a heat insulating material, a method for manufacturing the heat insulating material, and a combination of an article and a heat insulating material.

  In recent years, reduction of greenhouse gases has been promoted to prevent global warming, and energy saving is required for various articles such as containers, vehicles, buildings, equipment, and electrical products. Therefore, a heat insulating material is widely used to keep the inside of these articles cold or warm. For example, as one of the particularly effective heat insulating materials for the demand for energy saving and space saving, it is possible to achieve a heat insulating performance equivalent to urethane foam, which is a typical heat insulating material, in a thinner shape. A heat insulating material whose inside is decompressed is known.

  An example of this heat insulating material has a structure provided with a core material such as glass wool and a bag-shaped exterior material that houses the core material and whose inside is decompressed. An example of the exterior material has an opaque laminated structure including an aluminum foil gas barrier layer and a plastic base material layer. When the exterior material is used as a heat insulating material, the base material layer is more than the gas barrier layer. Also, the gas barrier layer is protected by the base material layer by being disposed on the outer surface side of the heat insulating material. For example, Patent Document 1 discloses a heat insulating material having such a configuration.

International Publication No. 2010/073762

  By the way, the above-mentioned heat insulating material is pressure-reduced in order to suppress the heat transfer by the convection of the gas inside a heat insulating material, and if a gas penetrate | invades inside a heat insulating material, heat insulation performance will fall. Therefore, when foreign matter such as oil or resin dust is mixed in the heat insulating material in the manufacturing process, gas is generated inside the heat insulating material due to decomposition or evaporation of the foreign material, and the heat insulating performance of the heat insulating material is lowered. There is a fear. Alternatively, when a foreign material such as a sharp metal is mixed in the heat insulating material during the manufacturing process, the foreign material may be damaged by the foreign material and the heat insulating performance of the heat insulating material may be reduced. Therefore, it is desirable to visually inspect the inside of the heat insulating material from the outside in the manufacturing process or after the manufacturing to inspect for the presence of the foreign matter inside. However, since the conventional heat insulating exterior material is opaque, such an inspection cannot be performed.

  In addition, as described above, since the heat insulation performance deteriorates when gas enters the heat-insulating material whose inside is decompressed, if the presence or absence of gas or its degree, or the state of heat insulation performance can be confirmed easily and easily, It can be said that it is preferable. However, with conventional heat insulating materials, it is necessary to check the state of heat insulating performance using a dedicated measuring device such as thermal conductivity, which is expensive and time-consuming.

  The present invention has been made in view of such points, and provides a heat insulating material that can visually recognize the decompressed interior from the outside, a method for manufacturing the heat insulating material, and a combination of the article and the heat insulating material. For the purpose.

Means for Solving the Invention

  The heat insulating material of the present invention includes a core material and a bag-shaped exterior material that houses the core material and has a reduced pressure inside, and at least a part of the exterior material is transparent.

  The combination of an article and a heat insulating material according to the present invention includes an article and a heat insulating material provided on the article, and the heat insulating material contains a core material, the core material, and a bag shape in which the inside is decompressed. And at least a part of the exterior material is transparent.

  The method for manufacturing a heat insulating material of the present invention includes a first step of preparing an exterior material that is at least partially transparent, a step of forming the exterior material in a bag shape, a step of storing a core material inside the exterior material, And a second step of performing a step of depressurizing the inside of the exterior material and a step of sealing the exterior material, and the presence or absence of foreign matter is determined during and / or after the second step. It is characterized by visual inspection.

  According to the present invention, the decompressed interior of the heat insulating material can be viewed from the outside.

FIG. 1 is a side sectional view showing a heat insulating material according to an embodiment of the present invention. FIG. 2 is a side cross-sectional view showing a heat insulating exterior material according to an embodiment of the present invention. FIG. 3 is a plan view showing a heat insulating material according to the embodiment of the present invention. FIG. 4 is a side view showing a combination of an article and a heat insulating material according to an embodiment of the present invention. FIG. 5 is a side view showing a modification of the combination of the article and the heat insulating material according to the embodiment of the present invention. FIG. 6 is a front view showing a modification of the combination of the article and the heat insulating material according to the embodiment of the present invention. FIG. 7 is a process diagram illustrating a method for manufacturing a heat insulating material according to an embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.
Here, FIGS. 1-6 is a figure which shows the heat insulating material by the embodiment of this invention, and the assembly of an article | item and a heat insulating material. In this specification, the term of the combination of the article and the heat insulating material is used to mean both the combination of the article and the heat insulating material and the combination of the article and the heat insulating material module.

<Insulation material>
As shown in FIG. 1, the heat insulating material 10 according to the present embodiment includes a core material 12 and a bag-shaped exterior material 11 that houses the core material 12 and is decompressed inside. Some are transparent.

  The core material 12 is preferably a porous body, and examples thereof include powders such as silica, foams such as urethane polymers, and fiber bodies such as glass wool, and glass wool having excellent heat insulation performance is preferable.

  The core material 12 preferably contains a gas adsorbent in order to adsorb a minute amount of moisture or oxygen penetrating from the outside. Examples of the gas adsorbent include silica, alumina, zeolite, or activated carbon.

  The packaging material 11 is a flexible film or sheet, and at least a part thereof is transparent. Therefore, it is possible to see through an object such as a foreign material, a core material, or a detection agent stored in the heat insulating material 11. The visible light transmittance of the exterior material 11 measured at 550 nm is preferably 20% or more, more preferably 50% or more, and particularly preferably 70% or more. In order to inspect the presence or absence of internal foreign matter, it is possible to confirm every corner of the interior, and therefore it is preferable that the entire exterior material 11 is transparent. Further, when the change of the detection agent is visually confirmed, it is not necessary to adjust the position of the detection agent as long as the exterior material 11 is all transparent, which is simple. On the other hand, in order to prevent the core material, the detection agent, and the like from being affected by external light, a part of the exterior material 11 can be transparent and the other part can be opaque.

  As the exterior material 11, a laminate in which at least a base material layer, a gas barrier layer, and a heat seal layer are laminated in this order from the outer surface side of the heat insulating material is preferably used. At this time, in order to make at least a part of the exterior material 11 transparent, at least a part of all the layers may be made transparent and at least a part of the transparent portions of the respective layers may be overlapped.

  The base material layer of the exterior material 11 has a function of holding other layers and protecting the gas barrier layer. There may be a plurality of substrate layers. By using a combination of base material layers having different characteristics, the protective function can be enhanced. For example, a combination of nylon (Ny) and polyester (Pes) base material layers is preferable. As a material for the base material layer, it is preferable to use plastic as a main component because it is easy to handle. Examples thereof include polyesters such as nylon, polyethylene terephthalate (PET), and polyethylene naphthalate (PEN), polyolefins, acrylics, and celluloses. It is done.

The gas barrier layer of the exterior material 11 has a function of blocking the intrusion of gas such as water, oxygen, nitrogen, etc., and maintaining the reduced pressure state of the heat insulating material. The gas barrier property of the gas barrier layer is preferably such that the oxygen transmission rate (23 ° C., 65% RH) is 0.5 cc · m ⁻² · day ⁻¹ · atm ⁻¹ or less, and the water vapor transmission rate (23 ° C., 65% RH) is preferably 0.5 cc · m ⁻² · day ⁻¹ · atm ⁻¹ or less. The material of the gas barrier layer is preferably mainly composed of a metal or a metal oxide, and examples thereof include aluminum, alumina, and silica. By stretching, vapor-depositing, or coating these materials, the gas barrier layer is formed. Can be formed. It is preferable to use an alumina layer and / or a silica layer having a thickness of 1 nm to 1 μm for the transparent portion of the gas barrier layer.

  The heat seal layer of the exterior material 11 has a function of sealing the facing exterior materials. As a material for the heat seal layer, a polymer having a glass transition temperature or a heat melting temperature of 80 ° C. to 300 ° C. is preferably a main component. For example, polyolefin such as polyethylene or unstretched polypropylene (CPP), urethane, or acrylic Is preferred.

  In addition, each layer of the exterior material 11 may be directly contacted and laminated, or may be laminated via an adhesive.

The inside of the heat insulating material 10 (in other words, the inside of the bag-shaped exterior material 11) contains the core material 12 and is depressurized in order to suppress heat transfer due to gas convection inside the heat insulating material. Yes. It is preferable to reduce the pressure to a vacuum state of 5 Pa or less. The preferable heat conductivity (23 degreeC65% RH) of the heat insulating material 10 is 10 * 10 <^-3> W * m <^-1> * K- ¹ or less.

  The heat insulating material 10 has an edge portion 13 formed along the outer edge portion of the core material 12 in order to store the core material 12 under reduced pressure. In the edge part 13, the two exterior | packing materials 11 which oppose by welding the outer periphery of the core material 12 mutually are welded. A small space 14 is formed between the exterior material 11 and the core material 12.

  When using the heat insulating material, the edge 13 of the heat insulating material 10 may be folded toward the center of the heat insulating material, and as shown in FIG. It is also possible to join with the edge 13 of another adjacent heat insulating material 10.

  Next, FIG.2 and FIG.3 shows an example of the exterior material 11 of the heat insulating material 10. FIG. The exterior material 11 is arranged in order from the outside, a transparent Ny layer 11a as a first base material layer, a transparent PET layer 11b as a second base material layer, a transparent deposited silica layer 11c as a gas barrier layer, and heat It is a transparent laminate including a transparent CPP layer 11d as a seal layer (see FIG. 2). Although not shown, a transparent adhesive is present between the Ny layer 11a and the PET layer 11b, and the deposited silica layer 11c and the CPP layer 11d. Then, a pair of exterior materials 11 are overlapped so that the CPP layers 11d face each other, and the CPP layer 11d in the entire outer peripheral edge of the core material housed inside is heat-sealed to form the edge portion 13 in this way. A bag-like transparent exterior material 11 with all sides sealed is obtained (see FIG. 3). The edge portion 13 has a heat seal portion 13 a that forms the outer edge of the exterior material 11, and a slight space 14 is formed between the heat seal portion 13 a and the core material 12. Since the exterior material 11 is transparent as described above, the decompressed interior of the heat insulating material can be viewed from the outside.

  It is preferable that a detection agent 15 whose change is visually identifiable is disposed inside the exterior material 11. It is because a detection agent can be visually recognized from the transparent site | part of an exterior material. Examples of such a detection agent 15 include a detection agent that causes a visually identifiable change by detecting gas, and a detection agent that causes a visually identifiable change by detecting temperature. Further, the visually identifiable change includes a color change and a shape change.

  For example, some commercially available oxygen detectors and moisture detectors change their color by detecting gases such as oxygen and moisture. By disposing such a gas detection agent inside the heat insulating material, it is possible to easily and easily visually confirm whether or not gas has entered the inside through a transparent portion of the exterior material. Furthermore, when such a gas detection agent also serves as a gas adsorbent, it is possible to maintain an internal reduced pressure environment while detecting gas intrusion.

  In addition, for example, some commercially available temperature indicating agents change their color by detecting a change in temperature. By arranging such a temperature detection agent inside the heat insulating material, it can be easily and easily visually confirmed through the transparent part of the outer covering material whether the heat insulating performance of the heat insulating material is deteriorated and becomes an abnormal temperature. be able to.

  In addition, for example, commercially available hygroscopic agents such as silica gel include those whose surface changes due to moisture and changes its shape. By disposing such a gas detection agent inside the heat insulating material, it is possible to easily and easily visually confirm whether or not gas has entered the inside through a transparent portion of the exterior material. Furthermore, when such a gas detection agent also serves as a core material, it is possible to maintain an internal reduced pressure environment while detecting gas intrusion.

  When a part of the exterior material 11 is transparent, the detection agent 15 inside the heat insulating material 10 is disposed at a position where it can be seen through the transparent portion of the exterior material 11. The position of the detection agent can be fixed by bonding the detection agent 15 to the exterior material 11 or the core material 12. Even when the entire exterior material 11 is transparent, the detection agent 15 may be bonded to the exterior material 11 or the core material 12 in order to place the detection agent at a position that is easy to see from the outside. preferable.

  In addition, a heat insulating material module can be obtained by joining at least two heat insulating materials 10 together. It is preferable that the heat insulating materials 10 are detachably joined to each other using, for example, a peelable adhesive or a fixing tool such as a tape or a stable. Furthermore, the change of the detection agent 15 arranged inside the exterior material 11 of at least one of the heat insulating materials 10 is identified by arranging the detection agent 15 whose change is visually identifiable inside the exterior material 11. In this case, the heat insulating material can be easily repaired by removing the heat insulating material from the heat insulating material module and replacing the heat insulating material. In this specification, being removable means that it can be removed while maintaining the reduced pressure inside the heat insulating material.

<Combination of goods and insulation>
The above-described heat insulating material 10 is used together with a building material such as a wall material 20.

  For example, as shown in FIG. 4, a plurality of heat insulating materials 10 are arranged on the surface of the wall material 20 in the vertical direction and the horizontal direction via an adhesive 22. In this case, each heat insulating material 10 is disposed in close contact with the heat insulating materials 10 adjacent to each other in the vertical direction and the horizontal direction, thereby enhancing the heat insulating function of the wall material 20. In addition, each heat insulating material 10 is provided in the surface of the wall material 20 so that removal is possible via the adhesive agent 22, and each heat insulating material 10 is joined so that the edge parts 13 can be removed. In this way, the wall material 20 and the heat insulating material 10 constitute an article / heat insulating material combination 20A.

  Or as shown in FIG.5 and FIG.6, you may arrange | position the some heat insulating material 10 along with the up-down direction and the left-right direction through the attachment jig 23 on the surface of the wall material 20. As shown in FIG. In this case, each heat insulating material 10 is disposed close to the heat insulating material 10 adjacent in the up-down direction and the left-right direction, and enhances the heat insulating function of the wall material 20. 5 and 6, an attachment jig 23 for attaching the heat insulating material 10 is attached to the surface of the wall material 20. Each heat insulating material 10 is detachably provided in the mounting jig 23, and the wall material 20 and the heat insulating material 10 constitute an article / heat insulating material combination 20 </ b> A.

  In addition, although the wall material 20 was demonstrated as an example, the content mentioned above is applicable similarly to various articles | goods, such as a container, a vehicle, a building, equipment, and an electrical product.

  In the combination 20A of the article and the heat insulating material, it is preferable that the heat insulating material 10 is detachably provided on the article. Moreover, it is preferable that the heat insulating materials 11 are mutually joined so that removal is possible. When the heat insulation property of at least one of the heat insulating materials deteriorates due to deterioration during use, the combination of the article and the heat insulating material can be easily repaired by removing and replacing the heat insulating material. is there.

  Further, in the combination 20A of the article and the heat insulating material, it is preferable that the detection agent 15 whose change is visually identifiable is disposed inside the heat insulating material 10.

  For example, when the heat insulating material 10 is used for a long time, a gas such as oxygen or moisture may enter the heat insulating material 10 from a portion where the exterior material 11 is heat-sealed. As described above, when gas enters the heat insulating material 10, the gas detection agent 15 reacts with the intruded gas, and the color of the gas detection agent 15 changes or the shape of the gas detection agent 15 changes.

  The operator P visually observes the inside of the heat insulating material 10 attached to the wall material 20 through a transparent portion of the exterior material 11, and based on a change in color or shape of the gas detection agent 15, Judgment that the heat insulation performance deteriorated. Next, the worker P can remove the heat insulating material 10 determined to have deteriorated the heat insulating performance from the wall material 20 and attach a new heat insulating material 10 to the wall material 20.

  Thus, since the pressure-reduced interior of the heat insulating material 10 can be visually recognized from the outside, the heat insulating performance of the heat insulating material 10 can be visually determined.

  In addition, although the example which visually observes a gas detection agent from the exterior of the heat insulating material 10 through the exterior material 11, and judges the fall of heat insulation performance was shown, it does not restrict to this but temperature detection is used instead of a gas detection agent. An agent may be used.

  Alternatively, the state of the core material 12 can be observed from the outside of the heat insulating material 10 through the transparent portion of the exterior material 11, and it can be observed whether an abnormality such as generation of mold occurs in the core material 12. It is also possible to observe whether foreign matter is mixed in the heat insulating material 10 through the transparent portion of the exterior material 11.

<Manufacturing method>
The manufacturing method of the heat insulating material 10 according to the embodiment of the present invention includes a first step of preparing an exterior material 11 that is at least partially transparent, a step of forming the exterior material 11 in a bag shape, and a core material 12 inside the exterior material 11. And a second step of performing a step of depressurizing the interior of the exterior material 11 and a step of sealing the exterior material 11. At this time, the quality insulating material 10 can be manufactured by visually inspecting the presence or absence of foreign matter through the exterior material 11 in the middle of the second step and / or after the second step.

  Below, as an example of a manufacturing method, as shown in FIG. 7, the example by exterior material preparation process S1, core material accommodation process S2, and vacuum sealing process S3 is demonstrated.

  In the exterior material preparation step S1, a bag-shaped transparent exterior material 11 in which at least one side is sealed by heat sealing or the like and an opening is formed is prepared. The exterior material 11 is preferably formed in a bag shape in which three sides are sealed in consideration of workability in a core material storage step S2 and a vacuum sealing step S3 described later.

  In the core material storage step S2, the core material 12 is stored inside the bag-shaped transparent exterior material 11 prepared in step S1. Specifically, the core material 12 is accommodated in the exterior material 11 from the opening of the bag-shaped exterior material 11.

  In the vacuum sealing step S3, the inside of the bag-shaped transparent exterior material 11 in which the core material 12 is accommodated in the step S2 is decompressed, and the opening of the exterior material 11 is sealed by heat sealing or the like. By this process, the core material 12 is accommodated in the exterior material 11 which is decompressed and vacuumed.

  In this way, a transparent heat insulating material 10 in which all sides of the rectangular shape are sealed and the inside is decompressed is obtained.

  Next, in the manufacturing method of the article and heat insulating material combination 20A according to the embodiment of the present invention, the heat insulating material 10 obtained by the above-described manufacturing method is applied to the goods through, for example, the adhesive 22 and the mounting jig 23. It is to be fixed.

DESCRIPTION OF SYMBOLS 10 Heat insulating material 11 Exterior material 12 Core material 13 Edge 15 Detection material 20 Wall material 20A Combination 22 of articles | goods and heat insulating material Adhesive 23 Mounting jig

Claims (3)

Goods,
A plurality of heat insulating materials provided on the article,
Each insulation is
A core material,
A bag-like exterior material that houses the core material and has a reduced pressure inside;
At least a part of the exterior material is transparent, the article is made of a wall material, and a lattice-shaped mounting jig is provided on the wall material. An assembly of an article and a heat insulating material, wherein the assembly is detachably fitted into the mounting jig while abutting against the mounting jig . Goods,
A plurality of heat insulating materials provided on the article,
Each insulation is
A core material,
A bag-like exterior material that houses the core material and has a reduced pressure inside;
At least a part of the exterior material is transparent, the article is made of a wall material, and a plurality of heat insulating materials are detachably provided on the wall material via an adhesive, and each heat insulating material has its respective edge portion. A combination of an article and a heat insulating material characterized in that they are detachably joined to each other. In the combination of an article and a heat insulating material according to claim 1 or 2, a detection agent that can visually identify a change is disposed inside the exterior material,
A combination of an article and a heat insulating material, characterized in that when a change in a detection agent disposed inside the exterior material of at least one heat insulating material is identified, the heat insulating material is removed from the wall material and replaced. How to repair your body.

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