JP3490426B1 - Vacuum heat insulating material, and refrigeration equipment, cooling / heating equipment using the same, and vacuum heat insulating material core material and manufacturing method thereof - Google Patents

Vacuum heat insulating material, and refrigeration equipment, cooling / heating equipment using the same, and vacuum heat insulating material core material and manufacturing method thereof

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Publication number
JP3490426B1
JP3490426B1 JP2002192615A JP2002192615A JP3490426B1 JP 3490426 B1 JP3490426 B1 JP 3490426B1 JP 2002192615 A JP2002192615 A JP 2002192615A JP 2002192615 A JP2002192615 A JP 2002192615A JP 3490426 B1 JP3490426 B1 JP 3490426B1
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Japan
Prior art keywords
heat insulating
insulating material
material
vacuum heat
vacuum
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Active
Application number
JP2002192615A
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Japanese (ja)
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JP2004052774A (en
Inventor
善英 平井
Original Assignee
松下冷機株式会社
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Priority to JP2002160656 priority Critical
Priority to JP2002-160656 priority
Application filed by 松下冷機株式会社 filed Critical 松下冷機株式会社
Priority to JP2002192615A priority patent/JP3490426B1/en
Priority claimed from TW092114811A external-priority patent/TW593919B/en
Publication of JP3490426B1 publication Critical patent/JP3490426B1/en
Application granted granted Critical
Publication of JP2004052774A publication Critical patent/JP2004052774A/en
Application status is Active legal-status Critical

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Abstract

[PROBLEMS] To provide a vacuum heat insulating material having excellent heat insulating performance, light weight, excellent productivity, rigidity and high flatness accuracy in a heat insulation and cooling device such as a refrigerator, a freezer, and a vending machine, and a vacuum heat insulating material core used therefor A material and a method for manufacturing the same are provided. Moreover, the refrigerator which consists of a heat insulation box with high heat insulation performance and was excellent in appearance quality with energy saving is provided. SOLUTION: A vacuum heat insulating material comprising a board-shaped core material and a jacket material enclosing the core material, the inside of which is sealed after decompression, and the board-shaped core material is made of a laminate of fiber nonwoven webs. Thus, a hardened layer in which the fibers are heat-fixed with a binder is formed on at least one surface of the core material. This vacuum heat insulating material is arranged on the outer box side of the space formed by the outer box and the inner box so that the surface of the vacuum insulating material on the hardened layer side faces the inner surface of the outer box. By filling a foamed heat insulating material, a refrigerator excellent in heat insulation and appearance quality can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention requires thermal insulation.
Things, such as refrigerators, insulated containers, vending machines, electricity
Can be used as a heat insulator for water heaters, vehicles, houses, etc.
Related to vacuum insulation. [0002] [0002] In recent years, energy conservation has been achieved from the viewpoint of preventing global warming.
Rugby is strongly desired, and household appliances
Energy saving is an urgent issue. Especially refrigerated
Heat and cold storage equipment such as storage, freezer, and vending machine efficiently uses heat
From the point of view of use, it has excellent heat insulation performance
There is a need for insulation. As a general heat insulating material, glass wool, etc.
Foams such as fiber materials and urethane foam are used
Yes. However, to improve the thermal insulation of these insulations
It is necessary to increase the thickness of the heat insulating material.
Space is limited, space saving and effective use of space
It cannot be applied when necessary. Therefore, a vacuum heat insulating material as a high performance heat insulating material.
Has been proposed. This is a core material that acts as a spacer
Is inserted into the jacket material having gas barrier properties, and the inside is reduced.
It is a heat insulating material sealed with pressure. As vacuum insulation material,
For example, it is disclosed in Japanese Patent Laid-Open No. 9-138058.
As a core material, organic fiber fibers such as glass wool
Using a compacted binder
it can. By the way, the vacuum heat insulating material is used as a heat insulating material such as a refrigerator.
When applied to a box, it is formed by an outer box and an inner box
Foam insulation material, outer box side, inner box side or outside of the space to be filled
It can be placed at any position between the box and the inner box
However, it is actually placed on the outer box side. Specifically, inside the outer box
Adhesion of vacuum insulation on the surface with double-sided tape or hot melt
Adhesive is often used. It is rare to place a vacuum heat insulating material on the inner box side.
The reason is that if it is placed on the inner box side, the application area of the vacuum insulation material
Can be made smaller, but
The box is easier to deform than the outer box, and the outer surface of the inner box is inside the outer box.
Since there are irregularities compared to the surface, the vacuum insulation is firmly
It is difficult to fix to the outer surface and filled with foam insulation.
A void is easily formed between the vacuum insulation and the inner box
The inner box is deformed due to the formation of cavities, and the heat insulation performance is
This is because there is a problem of lowering. Further, the vacuum heat insulating material is placed between the outer box and the inner box.
The reason why it is rarely placed in the middle is between the outer box and the inner box
If placed in the position, foam insulation in close proximity to the outer box or inner box
There are refrigerant pipes, water pipes, electrical wiring, and other objects buried in the material.
If the vacuum insulation material can be applied to the surface
Although there is a merit, vacuum insulation is placed in the outer box and the inner box.
The number of parts is increased and the workability is improved.
If the problem is bad or the foam insulation is filled,
Thermal material and its fixing member provide resistance to flow of foam insulation
As well as the flow of foam insulation, the vacuum insulation is on the inner box side
In order to divert to the outer box side, the wall thickness of the heat insulation box is reduced.
Difficult in filling density of foam insulation, resulting in voids
Is easy to form, due to cavity formation outer box or inner box
May be deformed or the heat insulation performance may be reduced.
Because there is a problem. [0008] However, the vacuum break
Fiber and binder such as glass wool as a core material for heat
When molded using, the binder is in the entire glass fiber
Dispersed and the inside of the fiber compact is evenly bound
If a core material is used, the solid thermal conductivity of the core material is large.
Problem that the heat insulation performance of the vacuum heat insulating material deteriorates.
there were. Furthermore, the exhaust resistance is large when making vacuum insulation materials.
The vacuum inside the vacuum insulation is difficult to decrease.
Therefore, the exhaust time becomes longer to obtain the prescribed heat insulation performance,
There was a problem that productivity of the air insulation material deteriorated. Japanese Patent Laid-Open No. 62-14725 discloses
The core material is rigid urethane foam with open cell structure
It has been proposed that the insulation of a completely open cell structure
Hard urethane foam block surface to get the body
Take a high density skin layer with closed cells formed in
Since it is necessary to remove the product yield,
There is a problem that it cannot be manufactured inexpensively. On the other hand, a vacuum heat insulating material is applied to the inner surface of the outer box of the heat insulating box.
When placing, the unevenness of the adhesive surface of the vacuum insulation material is the outer surface of the outer box
It tends to appear as unevenness, especially in household refrigerators.
Appearance quality of outer box composed of relatively large planes
Degree) is severe and has a big impact on the product value
The Therefore, conventionally, the bonding surface of the vacuum heat insulating material
In order to reduce the impact of the unevenness on the outer box,
Make sure that there are no irregularities on the adhesive surface (the adhesive surface of the vacuum insulation
Thick adhesion (so that there is no space between the inner surface of the outer box)
An agent layer is provided, or a soft member that absorbs unevenness is interposed
In addition, the vacuum insulation material with a large area instead of thickness is warped.
To cover one plane with a single vacuum insulation
Complimenting, unavoidably using multiple vacuum insulation,
High appearance quality (planar accuracy) of outer box and heat insulation performance of heat insulation box
High rigidity and high plane accuracy to achieve both dimensions
There was a need for vacuum insulation. Accordingly, the present invention provides a refrigerator, a freezer, an automatic
Efficient use of heat in thermal insulation equipment such as vending machines
It has excellent heat insulation performance and is lightweight
The purpose is to provide vacuum insulation materials with excellent productivity.
The In addition, the present invention provides a vacuum break with high rigidity and high plane accuracy.
An object is to provide a thermal material. The present invention also includes
Consists of heat-insulated box with high thermal performance, energy saving and appearance quality
An object of the present invention is to provide an excellent refrigerator. Also book
The invention relates to a vacuum heat insulating material core material, and further to the vacuum heat insulating material core material.
An object is to provide a manufacturing method. [0014] [Means for Solving the Problems] To solve the above problems
Therefore, the vacuum heat insulating material of the present invention comprises a board-shaped core material and the core material.
A vacuum that consists of a jacket material that encloses and seals the interior after decompression
It is a heat insulating material, and the board-like core material is a fiber nonwoven web.
It is made of a laminate, and the fibers are formed on at least one surface of the core material.
A hardened layer is formed in which the fiber is heat-set by a binder.,
The board-shaped core material is packaged with the outer jacket material.
Surface hardness as a vacuum insulation after heating is in the range of 50-80
IsIt is characterized by that.Another vacuum insulation of the present invention is
It consists of a board-shaped core material and a jacket material that encloses the core material,
A vacuum heat insulating material sealed inside after depressurizing, the board
The core material consists of a laminate of non-woven fiber webs,
At least one side of the fiber is heat fixed with a binder
A cured layer is formed, and the board-shaped core material is coated with the outer cover.
Table as vacuum insulation after packaging with materials
The surface hardness is in the range of 50-80, and vacuum insulation is used.
The bob taken out by breaking the jacket material after use
The surface hardness of the core material is in the range of 15-50.
Characterize. Using laminated material of fiber nonwoven web
Heat insulation between fiber nonwoven web layers is less likely to occur
It is possible to obtain a vacuum insulation material with excellent properties and
The hardened layer improves handling and
Improved surface smoothness improves stability and thermal insulation during installation.
improves. On the other hand, a layer that is hardly cured is formed in the inner layer
Insulation effect due to the decrease in thermal conductivity in the inner layer
Will improve. In addition, because we use fiber nonwoven web,
A continuous hole structure is formed in the entire core material, and this continuous hole structure
Between the outer shell material and the molded body during decompression in a decompression vessel
The remaining air expanded and the peripheral edge of the weld was torn to provide a jacket material.
Quality can be avoided by avoiding loss of effectiveness
Is stabilized. In the vacuum heat insulating material of the present invention, the bow
The density of the core material is 100 to 400 kg / mThreeIn the range
It is preferable. Density is 100kg / mThreeAbove
Can ensure the proportion of the material that constitutes the core material,
It is possible to give sufficient strength, while the density is 4
00kg / mThreeIn the following cases, the ratio of the core material to the heat insulating material
Can be kept low, resulting in good heat insulation. In the vacuum heat insulating material of the present invention, the front
The surface hardness of the board-like core material is preferably 15 to 70
Good. If the surface hardness is 15 or more, handling and
Surface smoothness can be ensured, while surface hardness is 70
Disposal of insulation after disposal of refrigerators etc.
It becomes easy to do. This surface hardness is such that a hardened layer is formed on the surface of the core material.
Although it is expressed by being made, the cured layer is
The fibers are heat-set by a binder, i.e. fibers
Formed by binding fibers with a binder
The The cured layer has a small void ratio, and fibers and binders.
Because it is formed by binding with, the rigidity is high. Therefore
On at least one side (preferably both sides) of the core material
By forming a hardened layer, the rigidity of the core is improved and
Good gripping performance. Also, the hardness of the core material is high
After sealing the inside with a jacket material after decompression,
However, almost all the depressions and large irregularities on the surface of the heat insulating material occur.
Since the surface smoothness can be maintained,
Adhesion at the time of installation to warm equipment is improved, and the heat insulation effect is more uniform
The layer is good. In the vacuum heat insulating material of the present invention,
The mixer is preferably made of an inorganic material. binder
By using an inorganic material for the
Heat generation over time of vacuum insulation material
Performance is improved. The binder is boric acid or boric acid.
Salt, phosphoric acid, phosphate and their heating products
At least one compound selected from the group of compounds
More preferably. These compounds are themselves
Easier to form hardened layer to form glassy material
Especially with good affinity with inorganic fibers
Hard to strain. In the vacuum heat insulating material of the present invention, the curing is performed.
The layer is sprayed with water on the surface of the laminate of non-woven fabric web
It may be formed more. This hardened layer is
Simply spray water onto the surface of the nonwoven web laminate
What is formed and is eluted from the fiber due to water adhesion
The fibers are bound by the quality (binder). water
In the method of spraying, water should not completely penetrate to the inner layer.
The inner layer has a lower binding strength, so the inner layer is more flexible.
Can be obtained. The fibers are preferably inorganic fibers,
Glass wool or fiberglass is especially preferred
Yes. In the vacuum heat insulating material of the present invention, the front
The jacket material is a plastic-metal foil laminate film.
Preferably there is. Cover the core with laminate film
The heat insulation effect is improved, especially the metal foil is the inner layer
By using plastic as the outer layer,
With excellent heat insulation performance,
Easy to attach to the heat insulation box,
By increasing the compatibility, the heat insulating effect is further improved. Therefore, the vacuum heat insulating material of the present invention is
The thermal conductivity is 0.0015 because it has a unique configuration.
It is in the range of ~ 0.0025 W / mK. This insulation performance
Is 10 times the conventional urethane insulation, glass wool
It is equivalent to 20 times and is at a very high level.
The Next, the refrigeration equipment and cooling / heating equipment of the present invention
Formed by an outer box, an inner box, and the outer box and the inner box
A foam insulation and a vacuum insulation in the space to be
Air insulation is placed in the space, before the vacuum insulation
Refrigeration equipment filled with foam insulation in the space and cold temperature
It is a device, and the vacuum heat insulating material is the vacuum heat insulating material of the present invention.
It is a material. In the space consisting of the outer box and the inner box,
Place vacuum insulation material with excellent thermal performance in other spaces
Cooling with excellent heat insulation performance by filling with foam insulation.
Freezing equipment and cold / hot equipment can be obtained. The refrigerator of the present invention includes an outer box and an inner box.
And foam in the space formed by the outer box and the inner box
A heat insulating material and a vacuum heat insulating material, and the vacuum heat insulating material is
Placed on the outer box side between, the empty space other than the vacuum heat insulating material
A refrigerator filled with foam insulation,
The air heat insulating material is the vacuum heat insulating material of the present invention, and the vacuum breaker
The surface on the hardened layer side of the heat material is opposed to the inner surface of the outer box.
It is characterized by that. [0028] The vacuum heat insulating material of the present invention is a bar of the inner layer of the core material.
Binder that is uniform to the inside of the core material by reducing the inner density
-It is lighter than conventional vacuum insulation material using a core material with a high concentration.
Thermal performance can be increased. Moreover, the vacuum heat insulating material of the present invention has a core
Since the hardened layer is formed on the surface of the material, the rigidity is high. Ma
In addition, the vacuum heat insulating material of the present invention is pressed by a smooth die press.
A hardened layer is formed by forming a hardened layer on the core material by compression heating.
The plane accuracy of the side surface can be increased. Also book
The vacuum insulation material of the invention is lightweight, rigid and high in plane accuracy
Therefore, a large area can be used. An outer box of a space consisting of an outer box and an inner box
On the side, the light weight, rigidity and high heat insulation performance of the present invention
High-vacuum vacuum insulation material is placed over a wide area, and other empty spaces
Appearance quality of outer box by filling with foam insulation between
(Planar accuracy) and heat insulation performance of the heat insulation box are compatible at a high level
Refrigerated with excellent energy quality and appearance quality
You can get a warehouse. The refrigerator of the present inventionThe outer box and the inner box
And foam in the space formed by the outer box and the inner box
A heat insulating material and a vacuum heat insulating material, and the vacuum heat insulating material is
Placed on the outer box side between, the empty space other than the vacuum heat insulating material
A refrigerator filled with foam insulation,
An empty heat insulating material is a board-shaped core material and a jacket material that encloses the core material.
It is a vacuum heat insulating material that is sealed after reducing the pressure inside.
The board-like core material is made of a laminate of non-woven fiber webs.
The fiber is bonded to at least one surface of the core material.
A heat-hardened hardened layer is formed, and the vacuum insulation
The hardened layer side surface of the material is arranged to face the inner surface of the outer box
AndA refrigerant pipe is provided on the inner surface of the outer box.
Against the marked partOf the vacuum insulationThe cured layer side
The refrigerant pipe is collected by pressing from the outside of the jacket material on the surface of
Formable grooveShiThe refrigerant pipe fits in the groove
likeThe vacuum insulationArrangedIt is characterized by. Book
The vacuum heat insulating material of the invention has the binder concentration of the inner layer of the core material.
By thinning and softening the inner layer of the core material,
After manufacturing the air insulation material, press the vacuum insulation material from above the jacket material with a press.
Grooves can be formed on the surface. And the inner surface of the outer box
The refrigerant distribution is also applied to the part where the refrigerant piping is installed.
Avoid placing multiple small vacuum insulations around the tubes.
A large vacuum insulation to cover the refrigerant piping
Because it can be used with a small number of vacuum insulation materials,
This effectively insulates heat transfer from the refrigerant piping to
A refrigerator with excellent energy can be obtained. The vacuum heat insulating material of the present invention is a hot melt
Can be fixed to the outer box with an adhesive such as
The thickness of the agent layer should be in the range of 70 to 130 μm.
preferable. An adhesive layer with a thickness exceeding 130 μm is provided.
It is a waste of adhesive, and adhesive is foam insulation.
Because it is easy to transmit heat, it leads to a decrease in heat insulation performance. Ma
Also, if the adhesive layer is less than 70 μm, the reliability of adhesion
Decreases. In addition, the vacuum heat insulating material core of the present invention is a fiber-free material.
It consists of a laminate of woven webs, and at least one side of the core material
A cured layer in which the fibers are heat-fixed with a binder on the surface
Is formed. Generally, depending on the binder, the surface of the molded body
A small amount of bean that forms a hardened layer only in the layer and penetrates inside
Most of the disk is transferred to the surface layer by migration.
May not form a hardened layer inside.
The In this case, cracks are generated inside the molded body as a whole.
There is concern about a decrease in strength. But for example fiber board
After forming into a shape, a binder is applied to the surface and compression heating
According to the method of obtaining a board-shaped molded body by
In the surface layer, the applied binder has a cured concentration.
A large layer is formed and a small amount of binder penetrated inside.
Hardens inside the surface layer without much migration
To do. As a result, the binder in the thickness direction of the board
Molded bodies with different concentrations can be obtained, and inside the board
However, a small amount of binder is cured, and the strength is excellent.
A molded article can be obtained. Therefore, the vacuum insulation core material of the present invention is manufactured.
The manufacturing method is a step of laminating fibers so as to have a predetermined shape.
And at least one side of the outer surface of the laminated fiber web
Applying an aqueous solution of indah or water;
The temperature of the laminated fiber web coated with the kinder is 100 ° C or lower.
And compressing the laminated fiber web compressed with 10
Heating and compressing at a temperature of 0 ° C. or higher.
Features. [0035] BEST MODE FOR CARRYING OUT THE INVENTION The vacuum heat insulating material of the present invention has a board shape.
It consists of a core material and a jacket material that encloses the core material.
A vacuum heat insulating material sealed after pressing, wherein the board-like core material is
It consists of a laminate of non-woven fiber webs, and at least the core material
The fiber was heat fixed by a binder on one surface
A hardened (solidified) layer is formed. Take
The cord-shaped core material has a surface hardness of 15 to 70
This surface hardness is preferably
It represents the surface hardness of the core material prior to grinding. Therefore
As a vacuum insulation material after packaging with a jacket material
The surface hardness is preferably 50 to 80, and desired
Preferably, it is in the range of 60 to 75. It is also possible to break the jacket material after using the vacuum heat insulating material.
The surface hardness of the core material taken out by
~ 50, preferably 20-40
It should be a range. If the surface hardness is too low,
Poor drilling and low work efficiency in the disposal process
On the other hand, considering the durability of the core
Even if there is some hardness reduction, the surface hardness is too high
In some cases, it is necessary to cut the hardened (solidified) layer separately.
Therefore, the process may become complicated. In the present invention, the hardness is durometer.
Defined by the value when the hardness of the core surface is measured by
The larger the value, the harder and the smaller the softer
The In the vacuum heat insulating material of the present invention, the board shape
The fiber is a binder on at least one surface of the core material.
Hardened (solidified) layer formed by binding is formed
Therefore, the binder in the outer layer and the inner layer in which the cured layer is formed
-Concentration is different. More specifically, the vacuum heat insulating material of the present invention
Is the surface layer binder in the thickness direction of the board-shaped molded body.
Der concentration is higher than other layers. The binder concentration of the surface layer
By making it larger than other layers, in addition to the above effects,
A core material with excellent surface smoothness is obtained, and true appearance is also excellent.
An air insulation is obtained. Further, the concentration of the binder in the interior other than the surface layer.
By providing a part with a low degree of solid heat conduction inside
It can be made smaller and the heat insulation performance is improved. further,
The exhaust resistance of the part where the binder concentration is low becomes small,
The degree of vacuum during evacuation can be reduced easily,
The improvement of the productivity of the heat material can be expected. Thus, the molded body
Using core materials with different binder concentrations in the thickness direction
The core material rigidity, heat insulation performance, and productivity are excellent.
An empty heat insulating material can be obtained. The board-like core material in the present invention is a non-woven fiber.
If the web laminate is made into a board, the limitation is especially
Not. The fiber constituting the core material is the above-described bow of the present invention.
Organic fibers can be used if they satisfy the properties of the core material.
Or any of inorganic fibers may be used. For example, as a fiber
Glass wool, glass fiber, alumina fiber,
Silica alumina fiber, silica fiber, rock wool, carbonization
Inorganic fibers such as silicon fibers, or natural fibers such as cotton,
Presence of synthetic fibers such as polyester, nylon, and aramid
Machine fibers can be used, and known materials are used.
be able to. From the viewpoint of heat resistance during compression heating, inorganic fibers
Maintenance is desirable. Above all, it has high weather resistance and good water resistance.
Glass wool and fiberglass are preferred from a certain point.
Used frequently. In particular, from the point of being excellent in weather resistance and water resistance,
Those made of boron-containing glass are desirable. The fiber used in the present invention has a fiber diameter.
Is not particularly limited, but forms a continuous pore structure.
To obtain a lightweight core material with high surface hardness
From the point, 0.1 to 20 μm, preferably 1 to 10 μm,
More preferably, it is 2-7 micrometers. Also product
From the viewpoint of preventing peeling of the layered body, the average fiber length is 5 to 1.
5 mm is preferably used, but is not limited to this.
Absent. The fiber material is characterized by the board-like core material of the present invention.
You may add a powder in the range which does not impair property. Powder and
For example, silica, pearlite, carbon black
Such as inorganic powder such as
Can give Also, urethane foam, foam
Foam resin powder such as enol foam and styrene foam
Known materials such as crushed materials can be used as appropriate. The binder used in the present invention is inorganic.
Or an organic binder etc. can be used. In particular,
Colloidal silica, alumina sol, water glass, secco
C, boric acid or its salt, boron oxide, phosphoric acid or its
Salt, sodium silicate, alkyl silicate, etc.
Binder, phenol resin, urea resin, mela
Min resin, xylene resin, furan resin, epoxy resin, etc.
Thermosetting resin, vinyl acetate, acrylic resin
Organic resin such as thermoplastic resin or natural product adhesive
You can raise These alone or mixed
Or use them with water or a known
It is also possible to use it diluted with an organic solvent. Above all,
Inorganic binders are preferred, especially boric acid, borates,
Of phosphoric acid, phosphate, or their heating products
It is preferable to include at least one compound. Examples of boric acid compounds include boron.
Acid, metaboric acid, boron oxide, sodium tetraborate
Sodium borate such as hydrate or anhydride, boric acid
Ammonium, lithium borate, magnesium borate
, Calcium borate, aluminum borate, boron
Zinc acids, perborates, alkylboric acid, boroxine
Derivatives and the like. Examples of phosphoric acid compounds include phosphorus.
Acid, phosphorus oxide such as diphosphorus pentoxide, primary phosphate, secondary li
Phosphate, tertiary phosphate, pyrophosphate, tripolyphosphate
Salts, phosphates such as metaphosphates, their sodium
Salt, potassium salt, ammonium salt, magnesium salt, salt
Examples thereof include a ruminium salt. Of these, glass-formed products or water-soluble materials
Sexual substances are preferred. For example, boric acid, metaboric acid, oxidation
Boron, borax, phosphoric acid, monoaluminum phosphate,
Such as sodium oxametaphosphate. Board-like fibers used as binders in molded articles
In the case of producing a fibrous body, one of the above compounds is used.
Is a mixture of two or more or other binders
Use them together or after diluting them. A method for attaching a binder to the core material
Although not particularly limited, the binder
Or apply or spray the diluted solution.
The Specifically, after forming the core material to some extent,
By spraying and then heating and compressing
The binder concentration differs in the thickness direction of the molded body
A molded body can be obtained. In addition, the binder and its
Spray the dilute solution and the binder concentration on the part of the board
Large fibers, and other parts with low binder concentration
Place fiber or binder-free fiber
By solidifying the post-fiber laminate by compression heating, etc.
This is because the binder concentration differs depending on the thickness direction of the molded body.
It is also possible to obtain a mode. Use fiber laminates
This makes it difficult for heat transfer between layers to
improves. Further, without using the above binder,
Water is sprayed on the surface of the nonwoven fabric web and the water adheres to it.
The fiber is dissolved by the substance (binder) that elutes from the fiber.
It may be bound. In this case, water is completely immersed up to the inner layer.
Because the inner layer is weak without binding strength,
As the inner layer, a more flexible core material can be obtained. Alternatively, a board with a high binder concentration
2 shaped board and board shaped body with low binder concentration
By combining more than one sheet, the concentration varies in the thickness direction.
It is also possible to obtain a core material. The binder concentration is the binder with respect to the core material.
So that the solid content is 0.1 wt% or more and 20 wt% or less
It is desirable to attach a binder to the surface. binder
As the amount increases, the amount of gas generated from the binder increases and the
Concerned about the increase in body thermal conductivity, the heat insulation performance of vacuum insulation materials
This is because it may have an adverse effect. On the other hand,
If the amount of inder is small, solidification of the fiber laminate is insufficient.
Because it becomes. The binder concentration is the thickness of the board-shaped molded body.
Preferably different in direction, but the binder
-Reduction of solid thermal conductivity and exhaust resistance at low concentration
The effect of adding board rigidity to large parts
Each can be given. Especially board-shaped molding
Of at least one surface layer of the body, or both surface layers
A board-like molded body with a high binder concentration is preferred.
As a result, surface properties are improved when vacuum insulation is used.
The After attaching the binder, the laminated molded body is compressed
Or, it is made into a board by heat compression. In this case, the density (density) of the board-shaped core material is
100-400kg / mThreeCan be pressurized to be
Desirably, the density within the board may be different. Dense
The degree is 100 kg / mThreeIf smaller, shape as a molded body
400kg / mThreeGet bigger
The thermal conductivity of the vacuum insulation material is poor due to the increase in solid thermal conductivity.
This is because it is conceivable. Board density (dense
Degree) is preferably 120 to 300 kg / mThreeAnd
More preferably 150 to 250 kg / mThreeIn the range
It is better. The thermal conductivity of the board-shaped core material is the average temperature.
At a temperature of 24 ° C., a range of 0.030 to 0.038 W / mK
Preferably 0.033 to 0.037 W / mK
It should be a range. In addition, the board-like core material is easy to handle,
Considering productivity, etc., it must have a certain degree of rigidity.
desirable. Core thickness (total thickness when two or more layers are stacked
Is not particularly limited, but usually 5 to 20 mm thick
Is used. The jacket material in the present invention is particularly limited.
But at least it has a gas barrier layer and a heat fusion layer
If necessary, provide a surface protective layer, etc.
May be. The gas barrier layer is a metal foil.
Or metal or inorganic oxide or diamond
Uses plastic film with vapor-like carbon deposition
Can be used to reduce gas permeation
If it is a thing, it will not specifically limit. Examples of the metal foil include aluminum and stainless steel.
Foil, iron, etc. can be used, but is limited
It is not something. Also, it becomes a base material on which the metal or the like is deposited.
The material of the plastic film is not particularly limited
No polyethylene terephthalate, ethylene-vinyl
L-alcohol copolymer resin, polyethylene naphthalene
Vapor deposition on nylon, polyamide, polyamide, etc.
preferable. Metal deposition on the plastic film
The materials are aluminum, cobalt, nickel, zinc,
Examples include copper, silver, or a mixture thereof.
It is not limited to. Further, there is no need to put on the plastic film.
Examples of machine oxide deposition materials include silica and alumina.
However, it is not particularly limited. Further, as the heat welding layer, a low density polyethylene is used.
Ren film, chain low density polyethylene film, high density
Polyethylene film, polypropylene film,
Liacrylonitrile film, unstretched polyethylene tele
Phthalate film, ethylene-vinyl alcohol copolymer
Use a coalesced film or a mixture thereof
However, it is not particularly limited. Further, a surface protective layer is provided on the outer surface of the gas barrier layer.
It is also possible to provide it. As the surface protective layer, nylon film,
Polyethylene terephthalate film, polypropylene
Film stretch products can be used, and the outside
If an iron film is provided, flexibility is improved and folding resistance is improved.
Bendability is improved. For laminating the above film
Yes. Above all, plastic-metal foil laminate film
Are preferably used. In addition, as the jacket material,
Uses metal containers using metal plates such as tenless plates and zinc plates
May be. The bag shape of the jacket material is a four-sided seal bag or a gusset.
Bag, three-side seal bag, pillow bag, center tape seal
There is no particular limitation such as a bag. In addition, a metal plate
There are methods such as molding and using. In addition, the reliability of the vacuum insulation is further improved.
Getter materials such as gas adsorbents and moisture adsorbents
Can also be used. In the production of the vacuum heat insulating material of the present invention,
First, prepare the jacket material, and then insert the core material into the jacket material.
May be sealed under reduced pressure, or with a core material in a vacuum tank
From a roll or sheet laminate film
A roll or sheet of jacket material
Heat the outer cover material after keeping it in line with the core material.
You may make a vacuum heat insulating material by or
Directly decompress the inside of the jacket material with the insert inserted to seal the jacket material opening.
Manufacture vacuum insulation by stopping or metal
A board-shaped core is inserted into a container molded with a plate, and a vacuum pump
The container and the metal container are connected with a pipe to reduce the pressure in the container.
Those who use vacuum insulation by sealing the back tube
There is a law, but it is not specified. Also board
The core material may be moisture dried before inserting the jacket material,
The adsorbent may be inserted together when the jacket material is inserted. The vacuum heat insulating material of the present invention has a hardened layer formed on the surface.
As a result, it has excellent surface smoothness even after decompression.
Is obtained. The surface roughness is JIS B
0601 can be obtained. The vacuum heat insulating material of the present invention is a refrigeration equipment or
It is preferably used as a heat insulating material for cold / hot equipment. In that case
Formed by the outer box and inner box of refrigeration equipment and cold / hot equipment
Place foam insulation and vacuum insulation in the space where
The vacuum heat insulating material is disposed in the space, and other than the vacuum heat insulating material
The space is filled with foam insulation. For example, suitable for refrigerator
If used, the outer box side of the space between the refrigerator outer box and the inner box
Alternatively, apply vacuum insulation on the inner box side and apply resin to other spaces.
Fill with foam, or vacuum insulation and foam resin
Integrated foam insulation in the space between the outer box and the inner box of the refrigerator
Arranged or used in the same way on the door, or
The usage method is especially specified, such as for partition plates.
Not between the machine room and the inner box, or the freezer room
The use of the vacuum heat insulating material around is particularly effective for heat insulation efficiency.
It is desirable because it is excellent and can operate a refrigerator with low electric energy. Vacuum insulation for refrigeration equipment such as refrigerators and cold equipment
When affixing materials, the cavity between the vacuum insulation and the outer box
From the point of preventing the formation and improving the insulation effect, the hardness of the vacuum insulation material
Fix the inner layer side to the inner surface of the refrigerator outer box
Is preferred. For fixing, use double-sided tape or hot melt.
Any adhesive can be used, but the adhesive reliability is high
From this point, a hot melt adhesive is preferably used.
The type of hot melt adhesive is not particularly limited, and ethylene
-Vinyl acetate copolymer resin, polyamide resin, polyester
And the like based on resin, synthetic rubber and the like. As the resin foam, for example, hard resin is used.
Retin foam, phenol foam and styrene foam
Can be used, but is particularly limited.
There is no. Also, for example, foaming hard urethane foam
As the foaming agent used when
However, from the viewpoint of protecting the ozone layer and preventing global warming,
Clopentane, isopentane, n-pentane, isobuta
N-butane, water (carbon dioxide foaming), azo compound, a
Lugon is desirable, especially from the point of thermal insulation performance.
Tan is particularly desirable. In addition, refrigerants used in refrigeration equipment / cold temperature equipment
Chlorofluorocarbon 134a, isobutane, n-butane, propa
Such as ammonia, ammonia, carbon dioxide, water, etc.
is not. In the present invention, refrigeration equipment and cooling / heating equipment
Requires heat insulation from -30 ° C, which is the operating temperature range, at room temperature
It is shown as a representative of the equipment to be
From cars, refrigerators using electronic cooling, and vending
Cooling / heating equipment and gas machines that use hot / cold heat up to high temperatures
Equipment that does not require power, such as an air conditioner or cooler box
Is also included. Furthermore, the vacuum heat insulating material of the present invention is
It can also be used for jars, jar pots, rice cookers, etc.
The Next, the manufacturing method of the vacuum heat insulating material core of the present invention will be described.
explain. In the production method of the present invention, the fiber web is
Laminating to a predetermined shape and laminated fibers
Vine diluted with water on at least one of the outer surfaces of the fiber web
Applying an aqueous solution (or water)
The temperature of the laminated fiber web coated with the kinder is 100 ° C or lower.
And compressing the laminated fiber web compressed with 10
Heating and compressing at a temperature of 0 ° C. or higher. fiber
Laminated webs with a predetermined shape and laminated fibers
A binder aqueous solution diluted with water on the outer surface of the web (or
Apply water). At this time, one side of the laminated fiber, or
Dilute with water on both sides or any outer surface such as the entire surface
Apply binder aqueous solution (or water). afterwards,
Laminated fiber web coated with binder is 100 ° C or less
It compresses at temperature, but this is room temperature compression that prevents moisture from evaporating
Is preferred. Here, the concentration of the aqueous binder solution is
Because it varies depending on the type of the kneader, the amount applied, and the amount added
Cannot be specified roughly, but consider solubility in water
In this case, the content is desirably 0.5 to 20% by weight. Binder
-The amount of aqueous solution applied is not particularly limited,
50 to 300 parts by weight per 100 parts by weight of the fiber laminate
It is preferable to use it at a ratio of not more than parts. 50 usage
If less than part by weight, the aqueous solution penetrates into the fiber laminate.
It is difficult, and if it is more than 300 parts by weight, the subsequent heating compression work
Excess water will flow out in the liquid state and bein
Because the binder also flows out, causing loss in the binder.
is there. Thereafter, the laminated fiber is heated at a temperature of 100 ° C. or higher.
Heating and compressing, which evaporates moisture, and
The purpose is to cure the binder, the binder
It is desirable to heat above the curing temperature. During heat compression
Prevented binder from penetrating too much into the laminate
From the viewpoint of preventing fiber melting,
It is preferable. In general, a binder was applied during fiberization.
When a molded body is produced using fibers, a uniform bar is formed in the molded body.
It is easy to obtain a board with an inder distribution and has a concentration gradient.
It is difficult to obtain a molded body that does. However, the present invention
According to the manufacturing method, the fibers are laminated in a predetermined shape, and the lamination
Apply a binder to at least one side of the finished fiber
Once at a temperature of 100 ° C or lower, ie, at a temperature of moisture evaporation or lower
By shrinking, the surface layer has a high binder concentration inside.
Set the binder concentration to a low level and then
By evaporating moisture by compression heating at the above temperature,
The binder concentration varies in the thickness direction, and the inside of the molded body
However, it is easy to obtain a core material with a small amount of binder bound to it.
In addition, an excellent core material can be obtained. [0081] The following examples and comparative examples further illustrate the present invention.
However, the present invention is not limited to this example.
Is not something (Embodiment 1) FIG. 1 shows an embodiment of the present invention.
It is sectional drawing of the vacuum heat insulating material. 1 is a vacuum insulation material
Insert the board-like core material 2 into the jacket material 3 and depressurize the inside.
As a vacuum heat insulating material 1. The board-shaped core material 2 has an average fiber diameter of 5 μm first.
m, average fiber length 10 mm, true specific gravity 2.5 g / cmThreeNo
Lath wool 4 was laminated to a predetermined density. Binder
-Binder 5 for 100 parts by weight of glass wool
10 parts by weight of water glass is dissolved in 90 parts by weight of water,
What used 100 weight part of glass aqueous solution was used. this
A glass woofer in which an aqueous water glass solution is laminated with a spraying device
Sprayed on both surfaces of the heat source 4
The density is 230kg / mThree20 minutes pre-
The board-like core material 2 was obtained. Board density is 2
35 kg / mThreeThe thermal conductivity is 0.35 W / mK
It was. A cross-sectional view of the board-like core material 2 is shown in FIG.
The There is not much binder 5 left on the board inner layer
First, many binders harden on the outer layer of the board and
It was confirmed that a cured layer was formed. Table of this core material
The surface hardness was measured and found to be 65. Also, the surface appearance of the board-like core material is
Observe with a path optical microscope BH-2 (magnification: 580 times)
The result is shown in FIG. Crossed fibers become binder
It can be seen that it is more bound and hardened. The jacket material 2 is made of two laminated films.
Bags were made with a three-way seal. The two laminate films
One of the films is a linear low-density polyethylene as a heat-sealing layer.
Ren film (hereinafter referred to as LLDPE) is 50 μm,
15-μm thick ethylene-vinyl alcohol as a gas barrier layer
To a lecole copolymer film (hereinafter referred to as EVOH)
A film formed with an aluminum vapor deposition with a thickness of 450 Å.
Film and polyethylene terephthalate with a thickness of 12μm
450 angstroms on film (hereinafter referred to as PET)
The film on which the aluminum vapor deposition is formed is the same as the aluminum vapor deposition surface.
LLDP with heat-bonding layer
E and EVOH of gas barrier layer are dry laminated.
The The other sheet is a LL with a thickness of 50 μm.
DPE, 6 μm thick Al as a gas barrier layer on top of it
Mi foil, and nylon with a thickness of 12μm as the protective layer.
The outer layer is made of nylon with a thickness of 12 μm
The The board-shaped core material 2 is dried in a drying furnace at 140 ° C.
Dry for 1 hour, insert into jacket 3 and internal up to 3 Pa
The pressure was reduced for 5 minutes and sealing was performed. The vacuum heat insulating material 1 produced as described above
Thermal conductivity is 0.0022 W / mK at an average temperature of 24 ° C.
And the surface hardness was 70. In addition, an acceleration test is performed to confirm reliability over time.
We evaluated the deterioration of the insulation material due to the
The thermal conductivity is 0.005 W / mK at an average temperature of 24 ° C.
It was. Break the outer jacket material of this vacuum insulation material and take out the core material
When the surface hardness was measured, it was 60. Example 2 Vacuum heat insulating material having the structure shown in FIG.
Was made. Insert the board-like core material 2A into the jacket material 3
Then, the inside was sealed as reduced pressure to obtain a vacuum heat insulating material. baud
The core 2A has an average fiber diameter of 5 μm and an average fiber length of 1
0 mm, true specific gravity 2.5 g / cmThreePlace 4 glass wool
Lamination was performed until the density was constant. Binder 5A is glass
Boric acid 3 as binder for 100 parts by weight of wool
Parts by weight in 97 parts by weight of water,
What was used as an amount was used. Spray this boric acid solution
Spray on both surfaces of the laminated glass wool 4 with a device,
It was pressed once at room temperature. After that, circulating hot air at 350 ° C
Density is 230kg / m in the ring furnaceThree20 minutes to become
During the pressing, a board-like core material 2A was obtained. This board core
The density of the material is 233kg / mThreeThe thermal conductivity is 0.34W /
mK. FIG. 4 shows a cross-sectional view of this board-like core material 2A.
The The board inner layer is also weaker than the outer layer, but it is
The amount of binder increases toward the outer layer.
It was confirmed that a cured layer was formed on the surface.
It was 45 when the surface hardness of this core material was measured. The board-shaped core 2A is dried at 140 ° C.
For 1 hour, insert it into the jacket 3 and keep the inside at 3 Pa.
And sealed for 5 minutes. The jacket material 3 is the same as in Example 1.
The same jacket material used in the above was used. The heat of the vacuum heat insulating material produced as described above
The conductivity is 0.002 W / mK at an average temperature of 24 ° C.
The surface hardness was 60. In addition, an acceleration test is performed to confirm the reliability over time.
We evaluated the deterioration of the insulation material due to the
The thermal conductivity is 0.005 W / mK at an average temperature of 24 ° C.
It was. Break the outer jacket material of this vacuum insulation material and take out the core material
The surface hardness was measured and found to be 35. This vacuum heat insulating material is the same as the vacuum break obtained in Example 1.
Compared to the heat material, boric acid was used as the binder, and
Because it is pressed at room temperature before heat compression, the inside of the core material
Since the binder remains, the cracks inside the core
Did not occur and improved in strength. Example 3 Vacuum heat insulating material having the structure shown in FIG.
Was made. Insert the board-like core material 2B into the jacket material 3,
The inside was sealed as reduced pressure to obtain a vacuum heat insulating material. Board
The core material 2B is composed of three boards. 2 of them
(21B) is an average fiber diameter of 5 μm and an average fiber length of 10 m.
m, true specific gravity 2.5 g / cmThreeOf glass wool 4
Binder 5B is a glass that has been laminated until
Boric acid 5 as binder for 100 parts by weight of wool
Part by weight is dissolved in 95 parts by weight of water, and 100 parts of boric acid aqueous solution is dissolved.
What was used as an amount was used. Spray this boric acid solution
Spray on both surfaces of the laminated glass wool 4 with a device,
It was pressed once at room temperature. After that, circulating hot air at 350 ° C
Density is 230kg / m in the ring furnaceThree20 minutes to become
Pressed for a while. The other (22B) has an average fiber diameter of 5μ
m, glass wool 4 with an average fiber length of 10 mm at 350 ° C.
The one that was compressed and heated was used. Use the above binder
A hardened layer is formed on the surface of the board-like core material (21B)
It was confirmed that the surface hardness was 45. These three boards have boric acid on the outside.
Board (21B), using only glass wool inside
The board (22B) was stacked to form a board-like core material 2B.
A cross-sectional view of the board-like core material 2B is shown in FIG. Outside
The covering material 3 is the same as the covering material used in Example 1.
Using. The density of this board-like core material is 190 kg / mThree,
The thermal conductivity was 0.34 W / mK. The board-shaped core material 2B is dried at 140 ° C.
Dry for 1 hour, insert it into the jacket material 2,
And sealed for 5 minutes. The vacuum heat insulating material 1B produced as described above.
Thermal conductivity of 0.0019 W / m at an average temperature of 24 ° C.
K, and its surface hardness was 60. Further, an acceleration test is performed to confirm the reliability over time.
We evaluated the deterioration of the insulation material due to the
The thermal conductivity is 0.005 W / mK at an average temperature of 24 ° C.
there were. Break the outer jacket material of this vacuum insulation material and take out the core material
The surface hardness was measured and found to be 35. Board with boric acid binder on the surface layer
And using a board made only of glass wool for the inner layer
Due to the absence of binder in the inner layer, solid thermal conductivity
The core material which was small and was excellent in heat insulation performance was able to be obtained. (Embodiment 4) FIG. 7 shows an embodiment of the present invention.
FIG. 8 is a cross-sectional view of the refrigerator-freezer, and FIG.
It is a principal part expanded sectional view of the ceiling surface part of a body. 6 is a refrigerator,
7 is a heat insulating box forming the refrigerator, 1A is a vacuum heat insulating material
The In this embodiment, the vacuum heat insulating material 1A is an outer box inside the box.
On the 8 side, the surface on the side where the hardened layer of the core material 2 </ b> A is formed is the outer box 8.
It arrange | positions so that an inner surface may be opposed. In this embodiment, on the inner surface of the outer box 8
For the portion where the refrigerant pipe 21 is disposed,
Press from the outside of the jacket 3 on the surface on which the hardened layer is formed
Vacuum heat insulating material having a groove 22 that can accommodate the refrigerant pipe 21
1A is arranged so that the refrigerant pipe 21 is accommodated in the groove 22.
The In this embodiment, the vacuum heat insulating material 1A is
Outer box 8 with thermoplastic gel-like hot melt adhesive 23
To fix. The thickness of the adhesive 23 layer is about 100 μm.
m, but it should be in the range of 70-130 μm
preferable. Adhesive 23 is vacuum insulated using rollers
The surface to be bonded to the outer box of the material 1A is uniformly uniform
Apply. The heat insulating box 7 is an outer box formed by press-molding an iron plate.
8 and inner box 9 made of ABS resin by vacuum molding via flange
The vacuum heat insulating material 1A is preliminarily placed inside the box configured as described above.
The space other than the vacuum heat insulating material 1A
The foam is filled with a foam 10. Hard
Retan foam 10 is cyclopentane as a blowing agent.
I use it. The heat insulating box 7 is partitioned by a partition plate 12.
The upper part is the refrigerator compartment 13 and the lower part is the freezer compartment 14
Yes. A damper 15 is attached to the partition plate 12.
The Reference numeral 16 denotes an evaporator disposed in the refrigerator.
Compressor 18, condenser 19, capillary tube 20
Are sequentially connected in a ring shape to form a refrigeration cycle. frozen
Isobutane, which is a refrigerant, is enclosed in the cycle.
The The evaporator is composed of a refrigerator compartment 13 and a freezer compartment 14.
Refrigeration cycle by connecting them in series and in parallel
May be formed. In addition, a door 11 is attached to the refrigerator 6.
The vacuum heat insulating material 1A is arranged inside the door body 11.
The space other than the vacuum insulation is rigid urethane foam
10 is filled with foam. The vacuum heat insulating material 1A is the same as that shown in Example 2.
It is the same composition. Consumption of the refrigerator configured in this way
When measuring the amount of power, refrigeration without vacuum insulation
It was 25% lower than the storage, confirming the heat insulation effect. Comparative Example 1 FIG. 9 shows a comparative example of the present invention.
It is sectional drawing of the vacuum heat insulating material. 1a is a vacuum heat insulating material
Insert the board-like core material 2a into the jacket material 3a,
It is sealed as a reduced pressure to form a vacuum heat insulating material 1a. Jacket material
The material configuration of 3a is the same as the jacket material 3 used in Example 1
The bag is made with a three-way seal and used as the outer cover material 3a.
The [0112] The board-shaped core 2a is made of glass wool 4a.
After fiberizing (same as used in Example 1), fiber table
It sprayed so that the binder 5a might adhere uniformly to the surface.
The binder aqueous solution is 100 parts by weight of glass wool,
90 weight water of 10 parts phenol resin as binder
Dissolved in an amount of 100 parts by weight of an aqueous phenol solution
Used. This raw cotton with a binder
In a hot air circulating furnace at 200 ° C
Density is 230kg / mThreePress for 20 minutes to
It was. When the surface hardness of this board-like core material was measured, it was 75.
Met. The density of this board-like core material is 240 kg.
/ MThreeThe thermal conductivity was 0.32 W / mK. The board-shaped core material 2a is dried at 140 ° C.
For 1 hour, and inserted in the jacket material 2a, and the inside is 3 Pa.
The pressure was reduced for 10 minutes until sealing. Cross section of board-shaped core 2a
The figure is shown in FIG. The vacuum heat insulating material 1a produced as described above.
The thermal conductivity is 0.003 W / mK at an average temperature of 24 ° C.
And the surface hardness was 80. In addition, an acceleration test is performed to confirm the reliability over time.
We evaluated the deterioration of the insulation material due to the
The thermal conductivity is 0.021 W / mK at an average temperature of 24 ° C.
there were. Break the outer jacket material of this vacuum insulation material and take out the core material
The measured surface hardness was 75. Compared to Example 1, the binder is
Use of enol resin and uniform curing in the board
As a result, both initial and temporal performance deteriorate. Comparative Example 2 FIG. 9 shows a comparative example of the present invention.
It is sectional drawing of the vacuum heat insulating material. 1b is a vacuum heat insulating material
Insert the board-like core 2b into the jacket 3b,
It sealed as decompression and was set as the vacuum heat insulating material 1b. Jacket material 3b
Is the same as the outer cover material 3 used in Example 1.
Thus, the bag was made with a three-sided seal to obtain an outer cover material 3b. The board-shaped core 2b is made of glass wool 4b.
After fiberizing (same as used in Example 2), fiber table
It sprayed so that the binder 5b might adhere uniformly to the surface.
The binder is vine to 100 parts by weight of glass wool.
Dissolve 3 parts by weight of boric acid in 97 parts by weight of water as a
What was made into 100 weight part of oxalic acid aqueous solution was used. This bar
Laminate raw cotton with an inner layer so that it has a predetermined density.
After that, the density is 230kg / m in a hot air circulating furnace at 350 ° C.
ThreeWas pressed for 20 minutes. The board-shaped core material 2b is dried at 140 ° C.
For 1 hour, and inserted in the jacket material 2b, and the inside is 3 Pa.
The pressure was reduced for 10 minutes until sealing. Cross section of board-shaped core 2b
The figure is shown in FIG. The density of this board-like core material is 2
33 kg / mThreeThe thermal conductivity is 0.34 W / mK
It was. When the surface hardness of this board-like core material was measured, it was 4
It was 5. The vacuum heat insulating material 1b produced as described above.
The thermal conductivity is 0.0025 W / m at an average temperature of 24 ° C.
K, and its surface hardness was 60. In addition, an acceleration test is performed to confirm the reliability over time.
We evaluated the deterioration of the insulation material due to the
The thermal conductivity is 0.015 W / mK at an average temperature of 24 ° C.
there were. Break the outer jacket material of this vacuum insulation material and take out the core material
The surface hardness was measured and found to be 35. Compared with Example 2, the binder was hardened uniformly.
As a result, the initial performance deteriorates and the exhaust
It took a long time. [0123] As described above, according to the present invention,
Easy to mold and excellent handling, and surface hardness
High degree of surface smoothness and low solid thermal conductivity
A vacuum heat insulating material excellent in heat insulating properties can be obtained. Also, at least one side of the vacuum heat insulating material core is used.
Hardened layer with fibers bound to the surface with a binder
Is formed, the core material is given rigidity and can be handled.
It becomes easy and the surface smoothness becomes good, and the vacuum break
Productivity at the time of manufacturing hot material is improved. Also, the thickness direction of the core material
The concentration of the binder that binds the fibers in the surface layer
Are larger than the other layers, and there are small parts inside.
As a result, the internal solid heat conduction is reduced and heat insulation is achieved.
Performance is improved. Furthermore, in the part where the binder concentration is small
Evacuation resistance is reduced, making it easier to lower the vacuum level during exhaust
Can improve the productivity of vacuum insulation.
The In addition, according to the refrigeration equipment and cold / hot equipment of the present invention,
In the space composed of the outer box and the inner box, the heat insulation performance of the present invention
Place excellent vacuum insulation and foam insulation in other spaces
Refrigeration equipment with excellent heat insulation performance by filling
And a cold / hot apparatus can be obtained. Also, the method for producing the vacuum heat insulating material core of the present invention
According to the binder concentration in the thickness direction,
The core of the present invention in which a small amount of binder is bound inside the molded body.
It is easy to obtain a material, and a core material excellent in strength can be obtained.
The Also, according to the refrigerator of the present invention, the outer box and the inner box
On the outer box side of the space consisting of the box, the lightweight and high rigidity of the present invention
Wide area of vacuum insulation with excellent heat insulation performance and high planar accuracy
Place in and fill the other space with foam insulation
The exterior quality (planar accuracy) of the outer box and the heat insulation of the heat insulation box
Performance can be achieved at a high level, saving energy
A refrigerator with excellent appearance quality can be obtained. The vacuum heat insulating material of the present invention is a vacuum heat insulating material.
After manufacturing, grooves are formed on the surface of the vacuum insulation material by pressing from the top of the jacket material
The refrigerant on the inner surface of the outer box
For the part where the pipe is installed, the groove that matches the refrigerant pipe
By placing the vacuum insulation material that formed a small number of sheets
Refrigerator with excellent energy saving by using several vacuum insulation materials
Can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view of a vacuum heat insulating material in one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a board-like core material in one embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a vacuum heat insulating material in one embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a board-like core material in one embodiment of the present invention. FIG. 5 is a schematic sectional view of a vacuum heat insulating material in one embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a board-like core material in one embodiment of the present invention. FIG. 7 is a schematic sectional view of a refrigerator-freezer in one embodiment of the present invention. FIG. 8 is an enlarged cross-sectional view of the main part of the ceiling surface portion of the heat insulation box of the refrigerator-freezer. FIG. 9 is a schematic sectional view of a vacuum heat insulating material in one comparative example of the present invention. FIG. 10 is a schematic cross-sectional view of a board-like core material in one comparative example of the present invention. 11 is an optical micrograph observing the appearance of the surface of the board-shaped core material of Example 1. FIG. [Explanation of Symbols] 1 Vacuum heat insulating material 2 Board-shaped core material 3 Cover material 4 Glass wool 5 Binder 6 Refrigerator 7 Heat insulation box 8 Outer box 9 Inner box 10 Hard urethane foam 11 Door body 12 Partition plate 13 Refrigeration room 14 Freezer room 15 Damper 16 Evaporator 17 Machine Room 18 Compressor 19 Condenser 20 Capillary Tube 21 Refrigerant Pipe 22 Groove 23 Hot Melt Adhesive

──────────────────────────────────────────────────── ─── Continued from the front page (58) Fields surveyed (Int.Cl. 7 , DB name) F16L 59/00-59/22 F25D 23/02-23/08

Claims (1)

  1. (57) [Claims] [Claims] [Claims] [Claim 1] A vacuum heat insulating material comprising a board-shaped core material and an outer jacket material enclosing the core material, the inside of which is sealed after decompression, the board-shaped core wood is a laminate of fibrous nonwoven web, heat-set hardened layer is formed by the fiber binder on at least one surface of the core material, like the board
    Vacuum break after packaging the core material with the jacket material
    A vacuum heat insulating material having a surface hardness of 50 to 80 as a heat material. 2. A vacuum heat insulating material comprising a board-like core material and a jacket material enclosing the core material, the inside of which is sealed after decompression, wherein the board-like core material is a laminate of non-woven fibrous webs A hardened layer in which the fibers are heat-set by a binder is formed on at least one surface of the core material, and the board shape
    Vacuum break after packaging the core material with the jacket material
    The surface hardness as a thermal material is in the range of 50-80, and
    Taken by breaking the jacket after using vacuum insulation.
    The surface hardness of the board-shaped core material taken out is in the range of 15-50.
    A vacuum heat insulating material characterized by being an enclosure . 3. The density of the board-shaped core material is 100-4.
    The vacuum heat insulating material according to claim 1 or 2 , which has a range of 00 kg / m 3 . 4. The vacuum heat insulating material according to claim 1, wherein the binder is made of an inorganic material. 5. The binder comprises boric acid, borate,
    The vacuum heat insulating material according to claim 4, wherein the vacuum heat insulating material is at least one compound selected from the group consisting of phosphoric acid, phosphate, and a heating product thereof. 6. The vacuum heat insulating material according to claim 1, wherein the hardened layer is formed by spraying water on a surface of a laminate of fiber nonwoven webs. 7. The vacuum heat insulating material according to claim 1, wherein the fiber is glass wool or glass fiber. 8. The vacuum heat insulating material according to claim 1, wherein the jacket material is a plastic-metal foil laminate film. 9. Thermal conductivity of 0.0015 to 0.0025
    It is the range of W / mK, The vacuum heat insulating material in any one of Claims 1-8. 10. An outer box, an inner box, a space formed by the outer box and the inner box, and a foam heat insulating material and a vacuum heat insulating material, the vacuum heat insulating material being disposed in the space, A refrigeration device and a cooling / heating device in which the space other than the vacuum heat insulating material is filled with a foam heat insulating material, wherein the vacuum heat insulating material is claim 1.
    A refrigeration device and a cooling / heating device, which is the vacuum heat insulating material according to any one of? 11. An outer box, an inner box, a space formed by the outer box and the inner box, a foam heat insulating material and a vacuum heat insulating material, and the vacuum heat insulating material on the outer box side of the space It is a refrigerator formed by filling the space other than the vacuum heat insulating material with a foam heat insulating material, wherein the vacuum heat insulating material is claim 1.
    The refrigerator according to any one of claims 9 to 9, wherein a surface of the vacuum insulation material on the cured layer side faces an inner surface of the outer box. 12. An outer box, an inner box, the outer box and the inner box
    Foam insulation and vacuum insulation in the space formed by
    And having the vacuum heat insulating material arranged on the outer box side of the space
    And fill the space other than the vacuum insulation with foam insulation
    And the vacuum heat insulating material is board-shaped.
    It consists of a core material and a jacket material that encloses the core material.
    A vacuum heat insulating material sealed after pressing, wherein the board-like core material is
    It consists of a laminate of non-woven fiber webs, and at least the core material
    A hard surface in which the fiber is heat-fixed on one surface with a binder.
    A surface of the hardened layer side of the vacuum heat insulating material is formed.
    While facing the inner surface of the outer box and for the portion where the refrigerant piping is disposed on the inner surface of the outer box ,
    The vacuum heat insulating material wherein said outer form a receiving groove capable of the refrigerant pipe by press from the outside of the covering material on the surface of the hardened layer side of the vacuum heat insulating material so that the refrigerant pipe fits in the groove < Refrigerator arranged. 13. The refrigerator according to claim 11, wherein the vacuum heat insulating material is fixed to the outer box with an adhesive. 14. The refrigerator according to claim 13, wherein the adhesive is hot melt. 15. The thickness of the adhesive layer between the vacuum heat insulating material and the outer box is 70 to 130 μm.
    The refrigerator according to 3 or 14. 16. A step of laminating fibers so as to have a predetermined shape, a step of applying an aqueous binder solution or water to at least one of the outer surfaces of the laminated fiber webs, and a laminated fiber web coated with a binder at a temperature of 100 ° C. or less. A method for producing a vacuum heat insulating material core, comprising: a step of compressing at a temperature; and a step of heating and compressing the compressed laminated fiber web at a temperature of 100 ° C. or higher.
JP2002192615A 2002-05-31 2002-07-01 Vacuum heat insulating material, and refrigeration equipment, cooling / heating equipment using the same, and vacuum heat insulating material core material and manufacturing method thereof Active JP3490426B1 (en)

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JP2002192615A JP3490426B1 (en) 2002-05-31 2002-07-01 Vacuum heat insulating material, and refrigeration equipment, cooling / heating equipment using the same, and vacuum heat insulating material core material and manufacturing method thereof
TW092114811A TW593919B (en) 2002-05-31 2003-05-30 Vacuum heat insulating material and method for producing the same, and refrigerator using the vacuum heat insulating material
EP03730754.3A EP1510747B1 (en) 2002-05-31 2003-06-02 Vacuum thermal insulating material, process for producing the same and refrigerator including the same
AU2003241723A AU2003241723A1 (en) 2002-05-31 2003-06-02 Vacuum thermal insulating material, process for producing the same and refrigerator including the same
US10/514,809 US7571582B2 (en) 2002-05-31 2003-06-02 Vacuum heat insulator, method of manufacturing the same, and refrigerator using the same
MXPA04011825A MXPA04011825A (en) 2002-05-31 2003-06-02 Vacuum thermal insulating material, process for producing the same and refrigerator including the same.
CNB038126265A CN1308611C (en) 2002-05-31 2003-06-02 Vacuum thermal insulating material, process for producing the same and refrigerator including the same
PCT/JP2003/006915 WO2003102460A1 (en) 2002-05-31 2003-06-02 Vacuum thermal insulating material, process for producing the same and refrigerator including the same

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JP2006084077A (en) * 2004-09-15 2006-03-30 Hitachi Home & Life Solutions Inc Vacuum heat insulating material and refrigerator using the same
JP2006153077A (en) * 2004-11-26 2006-06-15 Matsushita Electric Ind Co Ltd Vacuum heat insulating material and heat insulating box using the same
KR20060125463A (en) 2005-06-01 2006-12-06 히타치 홈 앤드 라이프 솔루션즈 가부시키가이샤 Vacuum heat insulating material and refrigerator using the same
JP2009155172A (en) * 2007-12-27 2009-07-16 Asahi Fiber Glass Co Ltd Glass fiber laminate, and vacuum heat insulating material
JP4713566B2 (en) 2007-12-28 2011-06-29 シャープ株式会社 Core material for vacuum heat insulating material, vacuum heat insulating material, and manufacturing method thereof
JP4772887B2 (en) * 2009-03-27 2011-09-14 シャープ株式会社 Core material for vacuum heat insulating material, vacuum heat insulating material, and manufacturing method thereof
JP4717126B2 (en) * 2009-04-07 2011-07-06 シャープ株式会社 Vacuum insulation and equipment equipped with it
JP4726970B2 (en) * 2009-04-07 2011-07-20 シャープ株式会社 Vacuum insulation and equipment equipped with it
DE102009027073A1 (en) * 2009-06-22 2010-12-30 BSH Bosch und Siemens Hausgeräte GmbH Domestic appliance, in particular refrigeration appliance
JP2011058538A (en) * 2009-09-08 2011-03-24 Hitachi Appliances Inc Vacuum heat insulating material, and cooling equipment or insulated container using the same
JP2011058537A (en) * 2009-09-08 2011-03-24 Hitachi Appliances Inc Vacuum heat insulating material, and cooling equipment or insulated container using the same
JP5414569B2 (en) * 2010-02-25 2014-02-12 日立アプライアンス株式会社 Vacuum insulation material and equipment using the same
KR101286342B1 (en) * 2010-08-17 2013-07-15 (주)엘지하우시스 Core material for vacuum insulation panel, method for fabricating the same and vacuum insulation panel using the same
JP5608611B2 (en) * 2011-07-11 2014-10-15 日立アプライアンス株式会社 Insulation
JP5899395B2 (en) * 2011-09-05 2016-04-06 パナソニックIpマネジメント株式会社 Heat insulation box
WO2013121992A1 (en) * 2012-02-14 2013-08-22 井前工業株式会社 Vacuum insulation material and method for manufacturing same
JP5779555B2 (en) * 2012-07-27 2015-09-16 日立アプライアンス株式会社 Vacuum insulation and refrigerator
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JP6190165B2 (en) * 2013-05-31 2017-08-30 日立アプライアンス株式会社 Vacuum insulation and insulation equipment

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