JP6617540B2 - Insulating member and method of attaching the same - Google Patents

Description

  The present invention relates to a heat insulating member and a mounting method thereof.

  In a house, a building, a vehicle, a heat insulation container, a refrigerator, a water heater, and the like, a vacuum heat insulating material is used to reduce energy consumption by heat insulation. As a vacuum heat insulating material, for example, a core material composed of powder or fiber is known that is sealed under reduced pressure in an outer bag composed of a gas barrier film (for example, Patent Document 1).

  The vacuum heat insulating material is usually plate-shaped, and is affixed to the construction surface of the heat insulating object using a double-sided adhesive tape or the like. When the construction surface of the object to be insulated is curved, the vacuum heat insulating material is attached while being curved according to the construction surface.

JP 2004-239300 A

  However, in the method of providing a vacuum heat insulating material on the construction surface of the heat insulating object, the heat insulating effect may not be sufficiently obtained. In particular, when the surface of the vacuum heat insulating material is uneven, such as when the surface of the vacuum heat insulating material is curved by bending the vacuum heat insulating material, or when the end of the gas barrier film in the vacuum heat insulating material is folded over, etc. It is difficult to obtain an effect. Moreover, even if it is a thick double-sided adhesive tape, it is difficult to obtain sufficient heat insulation effect.

  An object of this invention is to provide the heat insulation member from which the high heat insulation effect is obtained stably, and its attachment method.

The present invention has the following configuration.
[1] A plate-like vacuum heat insulating material and an elastic body, wherein the vacuum heat insulating material includes a core material and a gas barrier film covering the core material, and the core material is formed of the gas barrier film. The bag is sealed under reduced pressure, and the elastic body has a thickness of 3 mm or more, an elongation of 10% or more, an Asker F hardness of 10 or more, an Asker C hardness of 30 or less, and the elastic body is the vacuum heat insulating material. A heat insulating member provided at least on the periphery of the construction surface .
[ 2 ] The heat insulating member according to [1 ], wherein the elastic body is made of synthetic resin, natural rubber, or synthetic rubber.
[ 3 ] The heat insulating member according to [1] or [ 2], wherein the elastic body is an elastic foam.
[ 4 ] The elastic foam is at least one selected from the group consisting of flexible polyurethane foam, polyethylene foam, polypropylene foam, melamine foam, polyimide foam, natural rubber foam, and synthetic rubber foam. [ 3 ] Insulation member.
[ 5 ] The heat insulating member according to [ 3 ] or [ 4 ], wherein the elastic foam has at least one of sound absorption and water absorption.
[ 6 ] The heat insulating member according to any one of [ 3 ] to [ 5 ], wherein the elastic foam has a heat resistant temperature of 100 ° C or higher.
[ 7 ] A method for attaching a heat insulating member, wherein the heat insulating member according to any one of [1] to [ 6 ] is attached to a heat insulating object.
[ 8 ] A method of assembling the heat insulating member of any one of [1] to [ 6 ] to an object to be insulated, wherein the vacuum heat insulating material and the elastic body are separately prepared, and the elastic body is attached to the heat insulating object. A method for attaching a heat insulating member, wherein the vacuum heat insulating material is pasted through a heat sink.

The heat insulating member of the present invention can stably obtain a high heat insulating effect.
Moreover, according to the attachment method of the heat insulation member of this invention, a high heat insulation effect is obtained stably.

It is the perspective view which showed an example of the heat insulation member of this invention. It is sectional drawing of the heat insulation member of FIG. It is the perspective view which showed the other example of the heat insulation member of this invention. It is sectional drawing which showed a mode that the heat insulation member of FIG. 2 was attached to the heat insulation target object. It is sectional drawing which showed a mode that the heat insulation member of FIG. 3 was attached to the heat insulation target object. 5 is a graph showing changes in water temperature with respect to elapsed time in Example 1. It is sectional drawing which showed the other example of the heat insulation member of this invention. It is sectional drawing which showed the other example of the heat insulation member of this invention. It is sectional drawing which showed the other example of the heat insulation member of this invention. 10 is a sound absorption graph in Example 8 and Example 9.

[Insulation material]
The heat insulation member of this invention is equipped with a vacuum heat insulating material and the elastic body mentioned later provided in the at least periphery of the construction surface of this vacuum heat insulating material.

The elastic body in the heat insulating member of the present invention may be provided on at least the peripheral edge of the construction surface of the vacuum heat insulating material, and may be provided only on the peripheral edge of the construction surface of the vacuum heat insulating material. May be provided throughout.
Specifically, for example, as shown in FIGS. 1 and 2, a flat plate-like vacuum heat insulating material 10 having a rectangular shape in plan view, and an elastic body provided around the entire periphery of the construction surface 10 a of the vacuum heat insulating material 10. 12 is mentioned. Moreover, as shown in FIG. 3, the heat insulation member 2 provided with the flat-shaped vacuum heat insulating material 10 by the planar view rectangular shape, and the elastic body 12A provided in the whole construction surface 10a in the vacuum heat insulating material 10 is mentioned. .

Moreover, the heat insulation member of this invention is provided in the construction surface of a heat insulation target object so that an elastic body may become a heat insulation target object side.
Specifically, in the case of the heat insulating member 1, for example, as shown in FIG. 4, when the side surface of the heat insulating object 100 including the container body 110 having the upper opening and the lid body 112 is used as the construction surface 110a, the elastic member 1 is elastic. It attaches so that the body 12 may become the construction surface 110a side. Similarly, if it is the heat insulation member 2, as shown in FIG. 5, 12 A of elastic bodies will be attached to the heat insulation target object 100 so that it may become the construction surface 110a side.

  The heat insulating member of the present invention may include a vacuum heat insulating material having a curved construction surface. For example, as shown in FIG. 8, the heat insulation member 3 provided with the vacuum heat insulating material 10 bent and the elastic body 12 provided over the perimeter of the construction surface 10a in the vacuum heat insulating material 10 may be sufficient.

  The heat insulating member of the present invention may further include an elastic body on the surface of the vacuum heat insulating material that is not the construction surface. For example, as shown in FIG. 9, the heat insulating member 4 in which the elastic body 12A is provided on both the construction surface 10a of the vacuum heat insulating material 10 and the surface 10b that is not the construction surface may be used.

(Vacuum insulation)
The vacuum heat insulating material includes a core material and a gas barrier film that covers the core material, and the core material is sealed under reduced pressure in an outer bag formed of the gas barrier film.
The shape of a vacuum heat insulating material is not specifically limited, It can determine suitably according to the shape of the construction surface of a heat insulation target object. Usually, the shape of the vacuum heat insulating material is plate-like, and may be flat or curved with respect to the construction surface.

<Core>
As a core material, the well-known core material used for a vacuum heat insulating material can be used. For example, although the heat insulating material material containing a powder shape | molded in plate shape, glass wool, an airgel blanket etc. are mentioned, it is not limited to it. In the case of a core material containing powder, the heat insulating material preferably contains fibers in addition to the powder from the viewpoint of easily obtaining a high-strength core material.

<< Powder >>
The case of a core material containing powder will be described below as an example.
As powder, the well-known powder normally used for a core material can be used. Specific examples include fumed silica, porous silica, and a radiation suppressing material. The powder preferably contains fumed silica from the viewpoint of easily obtaining a core material having sufficient strength.
Only one type of powder may be used, or two or more types may be used in combination.

Since fumed silica is an extremely fine powder, a specific surface area is usually used as an index representing the particle size.
The specific surface area of the fumed silica is preferably 50 to 400 m ² / g, more preferably ^{100~350m 2 / g, 200~300m 2 /} g is particularly preferred. If the specific surface area of fumed silica is not less than the lower limit of the above range, excellent heat insulating performance can be easily obtained. If the specific surface area of fumed silica is not more than the upper limit of the above range, it is easy to attach a binder to the surface of the particles.
The specific surface area is measured by a nitrogen adsorption method (BET method).

Specific examples of fumed silica include, for example, Aerosil 200 (specific surface area 200 m ² / g, manufactured by Nippon Aerosil Co., Ltd.), Aerosil 300 (specific surface area 300 m ² / g, manufactured by Nippon Aerosil Co., Ltd.), CAB-O. -SIL M-5 (specific surface area 200 m ² / g, manufactured by Cabot Japan Co., Ltd.), CAB-O-SIL H-300 (specific surface area 300 m ² / g, manufactured by Cabot Japan Co., Ltd.), Leolosil QS30 (specific surface area) 300 m ² / g, manufactured by Tokuyama Corporation) and the like.
Fumed silica may use only 1 type and may use 2 or more types together.

When used in combination porous silica, the specific surface area of porous silica is preferably 100~800m ² / g, more preferably ^{200~750m 2 / g, 300~700m 2 /} g is particularly preferred. If the specific surface area of the porous silica is not less than the lower limit of the above range, excellent heat insulating performance can be easily obtained. When the specific surface area of the porous silica is not more than the upper limit of the above range, the amount of the binder absorbed by the porous silica can be reduced when the binder is used. Therefore, the core material can be molded with a lower pressure even if the amount of the binder to be added is small. As a result, the density of the core material can be lowered, and excellent heat insulation performance can be easily obtained.

The porosity of the porous silica is preferably 60 to 90%, more preferably 65 to 85%, and particularly preferably 70 to 80%. If the porosity of the porous silica is equal to or higher than the lower limit of the above range, the heat conduction of the solid can be reduced, so that excellent heat insulation performance is easily obtained. When the porosity of the porous silica is not more than the upper limit of the above range, the porous silica particles are hardly crushed at the time of molding, and excellent heat insulating performance is easily obtained because the porosity is maintained.
The porosity is measured by a nitrogen adsorption method (BJH method).

  The average particle diameter of the porous silica is preferably 1 to 300 μm, more preferably 2 to 150 μm, and particularly preferably 3 to 100 μm when measured on a volume basis by a laser diffraction scattering method, a Coulter counter method, or the like. If the average particle diameter of the porous silica is not less than the lower limit of the above range, porous silica having a high porosity can be easily obtained, and excellent heat insulation performance can be easily obtained. If the average particle diameter of the porous silica is not more than the upper limit of the above range, the density of the core material does not become too high, and excellent heat insulation performance is easily obtained.

  Specific examples of the porous silica include M.I. S. GEL and sunsphere (both manufactured by AGC S-Tech Co., Ltd.) are included.

  Examples of the radiation suppressing material include metal particles (aluminum particles, silver particles, gold particles, etc.), inorganic particles (graphite, carbon black, silicon carbide, titanium oxide, tin oxide, iron oxide, potassium titanate, etc.). It is done.

≪Binder≫
A binder can be included in the heat insulating material in order to maintain the shape of the core material from the viewpoint that sufficient strength can be easily obtained even if the core material has a low density. For example, fumed silica is used as a powder, and a fumed silica with a binder can be obtained by previously applying a binder to the surface of the fumed silica. The binder applied to the surface of fumed silica allows fumed silica with binder or fumed silica with binder and other materials (porous silica, fibers, etc.) to adhere to each other even when the pressure during molding is low. The
Even if the binder is applied to the porous silica, the binder is absorbed by the porous silica, so that it is difficult to obtain the effect of the binder.

The binder may be an organic binder or an inorganic binder. Especially, as a binder, an inorganic binder is preferable from the point that heat conductivity is low and the outstanding heat insulation performance is easy to be obtained.
Examples of the inorganic binder include sodium silicate, aluminum phosphate, magnesium sulfate, magnesium chloride and the like. Among these, sodium silicate is particularly preferable because it is easy to obtain excellent heat insulation performance.

  The binder is preferably dissolved in a solvent and used as a binder solution, and an aqueous solution is more preferable.

≪Fiber≫
When fibers are included in the heat insulating material, a high-strength core material is easily obtained.
As a fiber, the fiber normally used for a vacuum heat insulating material can be used, For example, a resin fiber and an inorganic fiber are mentioned. Of these, inorganic fibers are preferred because they have less outgas in a vacuum, can easily suppress a decrease in heat insulation performance due to a decrease in the degree of vacuum, and are excellent in heat resistance.

  Examples of the inorganic fiber include alumina fiber, mullite fiber, silica fiber, glass wool, glass fiber, rock wool, slag wool, silicon carbide fiber, carbon fiber, silica alumina fiber, silica alumina magnesia fiber, silica alumina zirconia fiber, silica magnesia. Examples include calcia fiber.

The fiber length D30 of the fibers used is preferably 100 μm or more, and more preferably 200 μm or more. If fiber length D30 is more than the said lower limit, it will be easy to suppress that a core material will generate a crack.
The fiber length D90 of the fiber used is preferably 20 mm or less, and more preferably 10 mm or less. If the fiber length D90 is equal to or less than the above upper limit value, the fibers are not easily entangled with each other, so that they are easily mixed with the powder and the effect of the fibers is easily obtained.
The thickness (diameter) of the fiber is preferably 15 μm or less from the viewpoint of suppressing an increase in solid heat transfer due to the fiber. Moreover, the thickness (diameter) of the fiber is preferably 1 μm or more from the viewpoint of easily preventing the core material from cracking. In the present specification, “fiber length D30” means the fiber length at 30% in the cumulative number distribution curve where the total number of fiber length distributions obtained on the basis of the number is 100%. “Fiber length D90” means a fiber length at a point of 90% in a cumulative number distribution curve where the total number of fiber length distributions obtained on the basis of the number is 100%. The fiber length distribution is obtained from a frequency distribution and a cumulative number distribution curve obtained by randomly measuring the length of 50 or more fibers in a photograph observed with an optical microscope.

≪Powder, binder, fiber ratio≫
The ratio of fumed silica in the powder (100% by mass) is preferably 50 to 100% by mass, more preferably 70 to 100% by mass, and particularly preferably 80 to 100% by mass. If the ratio of fumed silica is not less than the lower limit of the above range, a core material with high strength can be easily obtained.

  0-50 mass% is preferable, as for the ratio of the porous silica in powder (100 mass%), 0-30 mass% is more preferable, and 0-20 mass% is especially preferable. The larger the proportion of porous silica, the easier it is to obtain a vacuum heat insulating material with excellent heat insulating performance. If the ratio of porous silica is below the upper limit of the said range, a core material with high intensity | strength will be easy to be obtained.

If the powder contains a pre-binder with fumed silica was applied a binder on the surface and the porous silica, the ratio M _{A /} M _B of the mass M _B of the mass M _A and the porous silica fumed silica before the binder imparting Is preferably 50/50 or more, more preferably 70/30 or more, and particularly preferably 80/20 or more. If the ratio M _{A /} M _B is more than the lower limit, it has excellent thermal insulation performance at lower density, and tends core material is obtained having a sufficient strength.

  When the powder includes a radiation suppressing material, the proportion of the radiation suppressing material in the powder (100% by mass) is preferably 3 to 30% by mass, more preferably 5 to 25% by mass, and particularly preferably 10 to 20% by mass. preferable. If the ratio of the radiation suppressing material is equal to or higher than the lower limit of the above range, the effect of the radiation suppressing material is easily obtained. If the ratio of a radiation suppression material is below the upper limit of the said range, since the increase in the solid heat transfer by a radiation suppression material can be suppressed, the outstanding heat insulation performance is easy to be obtained.

  When using a fumed silica with a binder having a binder provided on the surface in advance, the binder ratio is preferably 0.1 to 15 parts by mass with respect to 100 parts by mass of the fumed silica before the binder is applied. 10 mass parts is more preferable, and 1-4 mass parts is especially preferable. When the ratio of the binder is equal to or higher than the lower limit of the above range, a core material having a lower density and sufficient strength can be easily obtained, and excellent heat insulation performance can be easily obtained. If the ratio of the said binder is below the upper limit of the said range, since the increase in the solid heat transfer by a binder can be suppressed, it is easy to suppress the fall of heat insulation performance. If the shape maintaining property of the core material can be ensured, the binder ratio is preferably small in order to obtain better heat insulation performance, and may not be added.

In addition, when fumed silica with a binder that has been previously provided with a binder is not used, such as when fumed silica, a binder and other components (porous silica, fibers, etc.) are mixed at the same time, 0.1-15 mass parts is preferable with respect to 100 mass parts of a body, 0.5-10 mass parts is more preferable, and 1-4 mass parts is especially preferable. If the binder ratio is at least the lower limit of the above range, a core material having a lower density and sufficient strength can be easily obtained, and excellent heat insulation performance can be easily obtained. If the ratio of a binder is below the upper limit of the said range, since the increase in the solid heat transfer by a binder can be suppressed, it is easy to suppress the fall of heat insulation performance.
When powder is used as the core material, the preferred composition of the powder is 70 to 90: 0 to 20:10 to 20 in terms of mass ratio (fumed silica: porous silica: radiation suppression material (the total is 100). Is preferred).

  1-30 mass parts is preferable with respect to 100 mass parts of powder, as for the ratio of a fiber, 2-20 mass parts is more preferable, and 4-10 mass parts is especially preferable. When the fiber ratio is equal to or higher than the lower limit of the above range, a high-strength core material is easily obtained. If the ratio of the fiber is equal to or less than the upper limit of the above range, an increase in solid heat transfer due to the fiber can be suppressed, and thus a decrease in heat insulation performance can be easily suppressed.

<Gas barrier film>
As the gas barrier film, a known film used for a vacuum heat insulating material can be used without limitation.
The size and shape of the outer bag formed of the gas barrier film are not particularly limited, and may be appropriately determined according to the size and shape of the core material.

<Degree of vacuum>
The vacuum degree in the outer bag of the vacuum heat insulating material is preferably 1 × 10 ³ Pa or less and more preferably 1 × 10 ² Pa or less from the viewpoint that excellent heat insulating performance is obtained and the life of the vacuum heat insulating material is increased. .

<Manufacturing method of vacuum heat insulating material>
The manufacturing method of the vacuum heat insulating material is not particularly limited, for example, a molding step of forming a heat insulating material material to obtain a core material, and the vacuum heat insulating material by sealing the core material under reduced pressure in an outer bag made of a gas barrier film. And a vacuum encapsulation step to be obtained.
As a method for obtaining a core material by molding a heat insulating material, a known method can be adopted, and examples thereof include a method in which a heat insulating material is put into a mold and pressed to form.

In the reduced pressure sealing step, for example, the core material is housed in an outer bag having an opening formed of a gas barrier film, and the outer bag is sealed with a heat seal or the like under a reduced pressure condition. The outside is returned to atmospheric pressure conditions to obtain a vacuum heat insulating material.
The seal portion (ear) formed by heat sealing or the like around the core material in the vacuum heat insulating material may or may not be folded. When the ear is not folded, a step is generated between the core portion and the ear portion of the vacuum heat insulating material, and the ear portion is not in close contact with the heat insulating object, so that heat is easily released. Specifically, as shown in FIG. 7, in the vacuum heat insulating material 10 in which the core material 14 is housed in the outer bag 13 and the peripheral portion of the outer bag 13 is heat sealed to form the seal portion 11, the vacuum heat insulating material 10 A step is generated on the construction surface 10a of the portion of the material 10 in which the core material 14 is accommodated and the seal portion 11. In this case, for example, the elastic body 12C having the same thickness as the step is attached to the heat insulation object side of the seal portion 11 to eliminate the step between the construction surface 10a and the seal portion 11 in the vacuum heat insulating material 10, and the construction surface 10a. It is preferable to provide the elastic body 12B so as to cover the elastic body 12C on the seal portion 11. Thereby, it is hard to produce a clearance gap between the construction surface of a heat insulation target object, and a seal | sticker part, and it becomes easy to suppress that air goes in / out between this construction surface and a vacuum heat insulating material, and heat enters / exits.

(Elastic body)
The elastic body in the heat insulating member of the present invention is a member having an elongation percentage of 10% or more, an Asker F hardness of 10 or more, and an Asker C hardness of 30 or less.

The elongation percentage of the elastic body is 10% or more, preferably 15 to 1000%, and more preferably 18 to 800%. If the elongation percentage of the elastic body is equal to or greater than the lower limit, it is possible to suppress the entry and exit of heat between the construction surface of the heat insulation object and the vacuum heat insulating material. If the elongation percentage of the elastic body is less than or equal to the upper limit of the above range, it can be suppressed that the elastic body is deformed excessively and the heat insulation becomes insufficient.
The term “elongation rate” means a value measured according to JIS K 6400 (2012 edition).

The Asker F hardness of the elastic body is 10 or more, preferably 12 or more, and more preferably 15 or more. If the Asker F hardness of an elastic body is more than the said lower limit, it can suppress that an elastic body deform | transforms excessively and heat insulation becomes inadequate.
The Asker C hardness of the elastic body is 30 or less, preferably 25 or less, and more preferably 20 or less. If the Asker C hardness of the elastic body is less than or equal to the above upper limit value, it is easy to suppress the entry and exit of heat between the construction surface of the object to be insulated and the vacuum heat insulating material.

  The thickness of the elastic body is preferably 1 mm or more, more preferably 1 mm or more and 50 mm or less, further preferably 2 mm or more and 40 mm or less, and particularly preferably 3 mm or more and 30 mm or less. If the thickness of the elastic body is not less than the lower limit of the above range, the effect of the elastic body can be easily obtained. If the thickness of the elastic body is not more than the upper limit of the above range, the heat insulating performance of the vacuum heat insulating material is likely to be effectively exhibited.

  When the elastic body is provided only on the peripheral edge on the construction surface of the vacuum heat insulating material like the heat insulating member 1, the width of the elastic body is preferably 3 mm or more, and more preferably 5 mm or more. If the width | variety of an elastic body is more than the lower limit of the said range, the outstanding heat insulation performance will be easy to be obtained.

The shape of the elastic body is not particularly limited, and can be appropriately determined according to the shape of the construction surface of the heat insulating object.
The elastic body includes an inorganic elastic body and an organic elastic body.
As the material for the organic elastic body, synthetic resin, natural rubber or synthetic rubber is preferable.
Examples of the synthetic resin include polyurethane resin, polyolefin resin, melamine resin, polyimide resin, polyamide resin, and fluorine resin.
Examples of the synthetic rubber include ethylene / propylene / diene rubber (EPDM), silicon rubber, and fluorine rubber.

Moreover, it is preferable that the material of an elastic body is selected according to the atmospheric temperature in which a heat insulation target object and a vacuum heat insulating material are used. For example, in the case of a high-temperature heat insulation object, melamine resin, polyimide resin, polyamide resin, fluororesin, EPDM, silicon rubber, and fluororubber are preferable. Moreover, in the case of a low-temperature heat insulation object, it can be arbitrarily selected from synthetic resins and synthetic rubbers.
Only one type of elastic body may be used, or two or more types may be used in combination.
When two or more types of elastic bodies are combined, two or more types of elastic bodies are laminated in layers, and when the temperature of the heat insulation target part is high, the heat-resistant elastic body is placed on the heat insulation target part side. When provided on the heat insulating material, deterioration of the elastic body can be suppressed.

The elastic body may be an elastic foam. When it is an elastic foam, it is difficult to form gaps when it is installed on the construction surface of the object to be insulated during construction, and it prevents air from going in and out between the construction surface and the vacuum insulation material. An elastic foam is preferable from the point of being easy to do.
Only one type of elastic foam may be used, or two or more types may be used in combination.

  The elastic foam is preferably at least one selected from the group consisting of flexible polyurethane foam, polyethylene foam, polypropylene foam, melamine foam, polyimide foam, natural rubber foam and synthetic rubber foam.

  Moreover, it is preferable that the material of an elastic foam is selected according to the atmospheric temperature in which a heat insulation target object and a vacuum heat insulating material are used. For example, in the case of a high-temperature insulation object, melamine foam, polyethylene foam, polypropylene foam, natural rubber foam and synthetic rubber foam are preferred. Moreover, in the case of a low-temperature heat insulation object, it can be arbitrarily selected from a synthetic resin foam and a synthetic rubber foam.

Furthermore, the elastic foam preferably has at least one of sound absorption and water absorption.
The elastic foam may have open cells or may have closed cells.
When the elastic foam has open cells, it is easy to suppress the entry and exit of heat, and since sound absorption and / or water absorption is good, entry and exit of sound and / or water can be suppressed. The elastic foam having open cells is not particularly limited as long as it has open cells, but a flexible polyurethane foam is preferable because an open cell foam can be easily obtained and sound absorption and / or water absorption are good.

Since the heat insulation and the vacuum heat insulating material having a sound absorbing property can reduce the sound generated from the heat insulation object together with the heat insulation, it can be suitably used for the heat insulation object where the sound is generated. Moreover, when the vacuum heat insulating material which has the suppression of heat | fever entry / exit and a sound absorption property is used as a heat insulating material of the wall surface and ceiling of a living space, the sound from the outside can be reduced with heat insulation.
Moreover, when a heat insulation target object is low temperature, water may adhere to a target object by dew condensation. Since the vacuum heat insulating material having suppression of heat in / out and water absorption absorbs moisture generated by dew condensation together with heat insulation, it can be suitably used for heat insulation of an object in which dew condensation occurs.

The density of the elastic foam is preferably ³ to 500 kg / m ³ , more preferably ⁵ to 400 kg / m ³ . If the density of an elastic body is more than a lower limit, it can control that an elastic body deforms excessively and heat insulation becomes insufficient. If the density of the elastic body is equal to or less than the upper limit of the above range, excellent heat insulating performance can be easily obtained.

  The elastic foam preferably has heat resistance. The heat resistance means that continuous use is possible at a temperature at which the heat insulating material is normally used. The temperature at which continuous use is possible is referred to as heat resistant temperature.

  The aspect of providing the elastic body on the construction surface of the vacuum heat insulating material is not particularly limited. For example, the aspect of attaching the elastic body to the construction surface of the vacuum heat insulating material with a double-sided adhesive tape, the aspect of attaching via an adhesive, Can be mentioned.

(Use)
The use of the heat insulating member of the present invention is not particularly limited, and examples thereof include a house, a vehicle, a heat and cold insulation container, a freezer, and a water heater.
The heat insulation member of the present invention is preferably used for heat insulation / cold insulation from the viewpoint of maintaining excellent heat insulation performance for a long period of time.

For example, as a water heater provided with the heat insulation member of this invention, what attached the heat insulation member of this invention to the outer surface of the hot water storage tank in a water heater, etc. are mentioned. By providing the heat insulating member of the present invention, a high heat insulating effect is stably exhibited.
In addition, when the heat insulating member of the present invention is used in a water heater, an elastic foam having a heat resistant temperature of 100 ° C. or higher is required to exhibit stable heat retention over a long period of time, depending on the temperature of hot water used. Is preferably used.

(Function and effect)
As described above, the conventional method of attaching the vacuum heat insulating material to the construction surface of the heat insulating object may not provide a sufficient heat insulating effect. When the present inventor examined this problem, because a gap is formed between the vacuum heat insulating material and the construction surface, the heat of the heat insulation object is diffused around by the air flowing through the gap. It turned out to be. In particular, if there are irregularities such as wrinkles on the surface of the vacuum heat insulating material, or if the end of the vacuum heat insulating material is folded over the ear, a gap is likely to occur between the vacuum heat insulating material and the construction surface, It is considered that the heat insulation effect is difficult to obtain. Moreover, even if the double-sided pressure-sensitive adhesive tape to which the vacuum heat insulating material is attached is thick, it cannot sufficiently follow the construction surface, and it is considered that a gap is likely to be generated between the vacuum heat insulating material and the construction surface.

On the other hand, in the heat insulation member of this invention, the elastic body which is easy to deform | transform compared with a vacuum heat insulating material is provided in the at least periphery of the construction surface of a vacuum heat insulating material. Thereby, in a state where the heat insulating member of the present invention is attached to the heat insulating object so that the elastic body is on the construction surface side, the elastic body is deformed according to the shape of the vacuum heat insulating material and the construction surface, and can be in close contact with them. Moreover, it is suppressed that a clearance gap produces between at least the periphery of a vacuum heat insulating material, and a construction surface. As a result, it is possible to stably obtain a high heat insulating effect by suppressing the heat of the heat insulating object from being diffused around by the air flowing between the heat insulating object and the vacuum heat insulating material.
Furthermore, since the material attached to the vacuum heat insulating material is an elastic body, for example, even if the space where the vacuum heat insulating material can be attached to the construction surface is limited, the attached elastic body is compressed and deformed in the thickness direction without cutting. Can be installed.

(Installation method of heat insulation member)
As a method of attaching the heat insulating member of the present invention to a heat insulating object, for example, a heat insulating member in which an elastic body is provided in advance on the construction surface of the vacuum heat insulating material is prepared, and the elastic body is on the construction surface side of the heat insulating object. The method of sticking this heat insulation member with a double-sided adhesive tape etc. is mentioned.

In addition, the vacuum heat insulating material and the elastic body are prepared separately, and the vacuum heat insulating material is attached to the heat insulating object through the elastic body, so that the heat insulating member is assembled while being assembled on the construction surface of the heat insulating target object. May be.
Specifically, for example, after attaching an elastic body such as a flexible urethane foam to a construction surface of a heat insulation object using a double-sided adhesive tape or the like, a method of attaching a vacuum heat insulating material to the elastic body using a double-sided adhesive tape or the like Etc. In addition, with the vacuum heat insulating material installed so that it is slightly separated from the construction surface of the object to be insulated, a caulking material is filled between the construction surface and the peripheral edge of the vacuum heat insulating material to form an elastic body. A material may be pasted. In addition, an elastic foam made of flexible urethane foam is formed by spraying between the work surface and the periphery of the vacuum heat insulating material in a state where the vacuum heat insulating material is placed slightly away from the work surface of the object to be insulated. And you may affix a vacuum heat insulating material.

EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by the following description. Examples 1-4 and 8 are examples, and examples 5-7 and 9 are comparative examples.
[Asker F hardness, Asker C hardness]
The Asker F hardness of the elastic body was measured using an Asker hardness meter F type at room temperature (22 ° C.) according to JIS K6253. In addition, about the flexible polyurethane foam, it measured with respect to the elastic body of thickness 38mm, and made it the value read 20 seconds after pressurization.
The Asker C hardness of the elastic body was measured in the same manner as the Asker F hardness except that an Asker hardness meter C type was used.

[Elongation rate, air permeability, density]
The elongation, air permeability, and density were measured according to JIS K6400 (2004 edition and 2012 edition).

[Production Example 1]
Fumed silica (trade name “Aerosil 300”, specific surface area 300 m ² / g, manufactured by Nippon Aerosil Co., Ltd., the same shall apply hereinafter) 40 parts by mass, sodium silicate 3 (manufactured by AGC S-Tech Co., Ltd.) ) Was mixed with a blender by diluting 3.4 parts by mass (1.3 parts by mass in terms of solid content) with 22.9 parts by mass of ion exchange water. Next, 40 parts by mass of fumed silica and M. as porous silica. S. 20 parts by mass of GEL (manufactured by AGC S-Itech Co., Ltd.) is added, and silica magnesia calcia fiber (trade name “Super Wool”, D30: 227 μm, D90: 902 μm, manufactured by Shin Nippon Thermal Ceramics Co., Ltd.) 2 as inorganic fiber A mass part was added and mixed by a blender to obtain a heat insulating material.
The obtained heat insulating material was put into a mold and formed into a flat plate having a length of 90 mm × width of 100 mm × thickness of 10 mm under pressure, and then heated at 200 ° C. for 1 hour to produce a core material. Next, two commercially available gas barrier films (ADY-134, manufactured by ADW Co., Ltd.) are stacked with the heat seal layer inside, and the core material is put into an outer bag in which only three sides are heat sealed, and the heat seal function It was installed in the attached vacuum chamber. After that, the pressure inside the chamber is reduced to 30 Pa, and the opening of the outer bag is heat-sealed and sealed in that state, and the outside of the outer bag is returned to the atmospheric pressure condition, and the vacuum is 90 mm long × 100 mm wide × 10 mm thick. Insulation was obtained.
Next, a flexible urethane foam having a length of 90 mm, a width of 100 mm, and a thickness of 5 mm was attached as an elastic body A to the entire surface of the vacuum heat insulating material with a double-sided adhesive tape to produce a heat insulating member. The flexible urethane foam used had an Asker F hardness of 25 (thickness 38 mm), an elongation of 280%, and a heat resistant temperature of 70 ° C. Other physical property values of the used flexible urethane foam were a permeability of 24 L / min and a density of 59.8 kg / m ³ .

[Production Example 2]
Production Example, except that the elastic body B is made of ethylene / propylene / diene rubber (EPDM) sponge (product name “Rubber Sponge E-4088”, manufactured by Inoac Corporation) instead of flexible urethane foam. In the same manner as in Example 1, a heat insulating member was produced. The rubber sponge used had an Asker C hardness of 6, an elongation of 220%, and a heat resistant temperature of 120 ° C.

[Production Example 3]
A heat insulating member was produced in the same manner as in Production Example 1 except that melamine foam having the same shape (product name “Basotect G”, manufactured by Inoac Corporation) was used instead of flexible urethane foam as elastic body C. . The melamine foam used had an Asker F hardness of 60, an elongation of 18%, and a heat resistant temperature of 150 ° C.

[Production Example 4]
A heat insulating member in the same manner as in Production Example 1 except that the same flexible urethane foam as used in Production Example 1 was attached to the four sides on one side of the vacuum heat insulating material along the periphery with a width of 20 mm and a thickness of 5 mm. Was made.

[Example 1]
A stainless steel container having a vertical and horizontal size of the upper opening of approximately 140 mm × 140 mm and a depth of 100 mm was prepared.
A vacuum heat insulating material having a size of length 140 mm × width 140 mm × thickness 10 mm obtained in the same manner as in Production Example 1 was attached to the bottom surface of the stainless steel container using a double-sided adhesive tape. Next, the four heat insulating members obtained in Production Example 1 were attached to the four side surfaces of the stainless steel container with a double-sided adhesive tape so that the elastic body was on the stainless steel container side. The flexible urethane foam having a thickness of 5 mm used in Production Example 1 was attached to the portion of the outer surface of the stainless steel container where the vacuum heat insulating material and the heat insulating member were not attached.
Fill the inside of the stainless steel container with water and heat it with a throwing heater. After setting the water temperature to 90 ° C, take out the throwing heater and cover the upper opening of the stainless steel container with a 25 mm thick Styrofoam resin plate (Styrofoam EX). Did. In the state which left this stainless steel container at room temperature (22 degreeC), the change of water temperature was measured with the thermocouple, and the time until water temperature became 50 degreeC was measured.

[Example 2]
Instead of the heat insulating member of Production Example 1, the change in water temperature was measured in the same manner as in Example 1 except that the heat insulating member of Production Example 2 was used, and the time until the water temperature reached 50 ° C. was measured.

[Example 3]
Instead of the heat insulating member of Production Example 1, the change in water temperature was measured in the same manner as in Example 1 except that the heat insulating member of Production Example 3 was used, and the time until the water temperature reached 50 ° C. was measured.

[Example 4]
Instead of the heat insulating member of Production Example 1, the change in water temperature was measured in the same manner as in Example 1 except that the heat insulating member of Production Example 4 was used, and the time until the water temperature reached 50 ° C. was measured.

[Example 5]
The change in the water temperature was measured in the same manner as in Example 1 except that the vacuum heat insulating material of Production Example 1 was attached to the four side surfaces of the stainless steel container instead of the heat insulating member obtained in Production Example 1, and the water temperature was 50 The time to reach ° C was measured.

[Example 6]
The change in water temperature was measured in the same manner as in Example 1 except that only the heat insulating member was not attached among the vacuum heat insulating material on the bottom surface of the stainless steel container, the heat insulating member on the side surface, and the flexible urethane foam in Example 1, and the water temperature was 50 The time to reach ° C was measured.

[Example 7]
In the same manner as in Example 1, a vacuum heat insulating material was attached to the bottom surface of the stainless steel container. Next, a flexible urethane foam having the same thickness of 5 mm as in Production Example 1 is attached to the four side surfaces of the stainless steel container with a double-sided adhesive tape so that the central portion in the width direction on the side surface is exposed in a strip shape having a width of 60 mm in the vertical direction. I attached. Next, the vacuum heat insulating material of Production Example 1 is attached to the flexible urethane foam on the four side surfaces of the stainless steel container with a double-sided adhesive tape, and a 5 mm gap is formed between the central portion in the width direction on the side surface of the stainless steel container and the vacuum heat insulating material. I was able to.
Next, as in Example 1, the stainless steel container was filled with water and heated, the change in the water temperature was measured with a thermocouple, and the time until the water temperature changed from 90 ° C. to 50 ° C. was measured.

The graph which showed the change of the water temperature with respect to the elapsed time in Example 1 is shown in FIG.
Further, Table 1 shows each physical property value of the elastic body in the elastic member of each example and the time until the water temperature reaches 50 ° C.

  As shown in Table 1, in Examples 1 to 4 using the elastic member of the present invention, the time until the water temperature changes to 50 ° C. is longer than in Examples 5 to 7 not using the elastic member of the present invention. Excellent heat insulation performance was obtained.

[Example 8]
In the same manner as in Production Example 1, a vacuum heat insulating material having a size of length 500 mm × width 500 mm × thickness 10 mm was obtained. Next, a flexible urethane foam similar to Example 1 having a length of 500 mm, a width of 500 mm, and a thickness of 5 mm was attached as an elastic body A to both surfaces of the vacuum heat insulating material with a double-sided adhesive tape to prepare a heat insulating member.
About the obtained heat insulation member, the sound absorption rate was measured in the range of frequency 400Hz-5000Hz by the reverberation room method based on ISO140-3.

[Example 9]
About the vacuum heat insulating material used in Example 8, the sound absorption rate was measured by the same method as Example 8.

  The measurement results of Examples 8 and 9 are shown in FIG. As shown in FIG. 10, by sticking a flexible urethane foam to a vacuum heat insulating material, not only the heat insulating performance is excellent, but also sound absorbing properties can be imparted.

  The heat insulating member manufactured by the manufacturing method of the present invention can be applied to a place where energy saving is required and heat insulation, cold insulation, and heat insulation are required. Specifically, for example, housing and building walls / roofs / floors / piping, solar / heat facilities, etc .; constant temperature baths, water heaters, hot water tanks, rice cookers, refrigerators, freezers, cold storage / cold storage tanks, Warm and cold storage fields such as vending machines, cooler boxes, cold covers, and cold clothes; electrical and electronic equipment such as notebook computers, liquid crystal projectors, copiers, batteries and fuel cells, and industrial equipment such as semiconductor manufacturing equipment; automobiles, It can be applied to mobile fields such as buses, trucks, cold trucks, trains, freight cars, ships, etc .;

1, 2 Heat insulation member 10 Vacuum heat insulation material 10a Construction surface 12, 12A Elastic body

Claims (8)

It has a plate-shaped vacuum heat insulating material and an elastic body,
The vacuum heat insulating material includes a core material and a gas barrier film covering the core material, and the core material is sealed under reduced pressure in an outer bag formed of the gas barrier film,
The elastic body has a thickness of 3 mm or more, an elongation of 10% or more, an Asker F hardness of 10 or more, an Asker C hardness of 30 or less, and the elastic body is provided at least on the periphery of the construction surface of the vacuum heat insulating material. Insulation member. The heat insulating member according to claim 1, wherein a material of the elastic body is synthetic resin, natural rubber, or synthetic rubber. The elastic body is an elastic foam insulation member according to claim 1 or 2. The elastic foam, flexible polyurethane foam, polyethylene foam, polypropylene foam, melamine foam, polyimide foam is natural rubber foam and at least one member selected from the group consisting of synthetic rubber foam, according to claim 3 Thermal insulation member. The heat insulating member according to claim 3 or 4 , wherein the elastic foam has at least one of sound absorption and water absorption. The heat insulation member according to any one of claims 3 to 5 , wherein the elastic foam has a heat resistant temperature of 100 ° C or higher. The heat insulation member attachment method which affixes the heat insulation member as described in any one of Claims 1-6 to a heat insulation target object. A method for assembling the heat insulating member according to any one of claims 1 to 6 to an object to be insulated,
A method for attaching a heat insulating member, wherein the vacuum heat insulating material and the elastic body are separately prepared, and the vacuum heat insulating material is attached to a heat insulating object via the elastic body.

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