WO2002041126A1

WO2002041126A1 - Portable information equipment

Info

Publication number: WO2002041126A1
Application number: PCT/JP2001/009984
Authority: WO
Inventors: Akiko Yuasa; Yasuaki Tanimoto; Chie Hirai
Original assignee: Matsushita Refrigeration Company
Priority date: 2000-11-16
Filing date: 2001-11-15
Publication date: 2002-05-23
Also published as: KR20030051826A; CN1474968A; CN1208705C; KR100538854B1

Abstract

A portable information equipment such as a notebook-sized personal computer, comprising a high performance insulator capable of interrupting a heat transfer between a heating part therein and an equipment case to suppress the temperature rise of an equipment surface, a high performance insulator capable of interrupting a heat transfer between the heating part and an extension device mounting case to suppress the temperature rise of an external extension device so as to prevent the maloperation thereof, and a radiating plate, wherein the insulators are vacuum insulators with inorganic fibers as core materials.

Description

Description Portable information equipment Technical field

The present invention relates to a portable information device such as a notebook computer, and more particularly to a portable information device that prevents heat generated inside from being transmitted to a user and preventing malfunction. Background art

In recent years, when heat generated inside an information portable device such as a notebook computer is transmitted to the surface of the device case and the temperature of the device case surface rises, the body of the device user and the surface of the device case become longer. The heat of the parts that come in contact with the time gives the user discomfort. The heat source inside the computer is mainly CPU and power supply. In particular, the surface temperature of CPU reaches a temperature exceeding about 100 ° C.

Under these circumstances, a recent technology has been proposed that uses a heat insulating material to cut off the space between the heating section inside the equipment and the equipment case.

For example, as disclosed in Japanese Patent Application Laid-Open No. H11-229798, a heat insulating material for shutting off a space between a heat generating portion inside the device and the device case, and a heat radiating plate provided on a back surface of the display portion. There have been proposed a heat pipe for transmitting heat generated inside the apparatus to a heating plate and a notebook computer having a vent. By utilizing the technique disclosed in Japanese Patent Application Laid-Open No. 11-200980, the temperature rise on the surface of the main body case can be suppressed to some extent. The effect of suppressing the amount of heat transferred to the surface of the equipment case is small, and to achieve this effect, increase the thickness of the heat insulating material. Need to be On the other hand, in recent years, notebook computers have been demanded to be thinner and lighter, and the heat insulating material also needs to be small and lightweight.

On the other hand, the heat generated inside the device may adversely affect external expansion terminals such as random access memory (RAM) cards and local area network (LAN) cards, leading to malfunction.

As a general heat insulating material, a fibrous body such as glass wool or a foam such as urethane foam is used. However, in order to improve the heat insulating properties of these heat insulating materials, it is necessary to increase the thickness of the heat insulating material, and when the space where the heat insulating material can be filled is limited and space saving or effective use of space is required. Cannot be applied.

As one means for solving such a problem, there is a vacuum heat insulating material composed of a core material for holding a space and a jacket material for shutting off the space and the outside air. As the core material, powder materials, fiber materials, interconnected foams, and the like are generally used, but in recent years, vacuum insulating materials with higher performance have been required. Therefore, for the purpose of improving the performance of the core material, Japanese Patent Application Laid-Open No. 60-33479 discloses a vacuum heat insulation characterized in that powdered carbon is uniformly dispersed in parlite powder. Propose materials. Further, a vacuum heat insulating material characterized in that the powdered carbon is carbon black is disclosed, and by uniformly dispersing a force pump rack in the pearl, the heat insulating performance is improved under optimum conditions. 0% improvement.

Further, Japanese Patent Application Laid-Open No. Sho 61-36595 proposes a vacuum heat insulating material characterized in that carbon powder is uniformly dispersed in various powders. In the embodiment, the heat insulation performance is improved by 20% under the optimum condition by uniformly dispersing carbon black in silica having a single particle diameter of 100 nm.

In addition, Japanese Patent Publication No. 8-200302 discloses that the production of It discloses a vacuum heat insulating material using fine powder produced from fumes produced from the fumes, and a vacuum heat insulating material containing at least 1 wt% or more carbon in the fine powder. This insulation shows a 23% improvement in insulation performance.

However, pearlite in Japanese Patent Publication No. 60-33479, silica with a single particle diameter of 100 nm in Japanese Patent Application Laid-Open No. 61-36595, and Japanese Patent Publication No. In the specification that contains powdered carbon and carbon in the fumes generated in the production of ferrosilicon in Japanese Patent No. 2 The generated fume does not show particularly excellent performance as a core material of vacuum heat insulating material.Therefore, even in specifications aimed at sophistication that contains powdered carbon and carbon, it is dramatically faster than other vacuum heat insulating materials However, the heat insulation performance is not improved, and the heat insulation performance improvement effect is only about 20%.

In the specification using carbon black as the powdered carbon, the power pump rack is generally a soot-like product obtained by incompletely burning an oil component, and therefore contains an organic gas as an impurity. Therefore, there was a problem that gas was generated over time, which increased the internal pressure of the vacuum heat insulating material and deteriorated the heat insulating performance. In addition, reactive groups such as carbonyl groups present at the molecular structure terminals of carbon black react with moisture in the air, and also generate gas over time, similarly increasing the internal pressure of the vacuum insulation material. However, the heat insulation performance deteriorates.

Generally, a porous material is used as the core material, and when roughly classified, it is classified into a communication form, a fiber type, and a powder type.

Of these, powdered silica powder is often used as a powder-based vacuum insulation material. However, it has excellent thermal insulation performance over time.

However, since it is a powder, workability is poor, and it is difficult to deform it because the powder is used in an inner bag. At the time of disposal, the powder scatters and the working environment deteriorates. In order to improve this, attempts have been made to use compacted powders. However, since it is difficult to mold silica powder alone into a porous body, various binders are used.

For example, Japanese Patent Publication No. 4-46364 discloses a vacuum heat insulating material using a compact obtained by mixing and compressing wet silica and a fiber reinforcing material.

In this method, when the temperature difference between the walls using wet silica, fiber reinforcement, and vacuum insulation is large, an anti-radiation material is added and mixed, and compression molding is performed to form a molded body.

In addition, Japanese Patent Publication No. 5-66341 provides a vacuum heat insulating material using a compact formed by mixing and dispersing dry silica, wet silica, and fiber reinforcing material. '

This complements the low thermal conductivity, which is an advantage of dry silica, and the ease of pressing work, which is the advantage of wet silica, and forms a compact by mixing a fiber reinforcing material.

However, it is difficult to mold the sily powder alone.

Also, as disclosed in Japanese Patent Publication No. Hei 4 (1988) -46838, even when wet silica is mixed with a fibrous material, stirred, and compression molded to obtain a molded product, the molded product is brittle enough to collapse when it is held in hand. It is. In addition, powdering is severe, and workability and handling are poor. In addition, the fragility of a cylindrical shape, for example, causes it to collapse quickly because of its brittleness, and is inflexible, thus limiting its application.

Also, as disclosed in Japanese Patent Publication No. 5-663341, wet silica and dry silica are used. Even if it is attempted to obtain a compact by mixing force, fiber material, and stirring and compression molding, it is difficult to become a compact and brittle because wet silica is mixed. In addition, powdering is severe and there is no flexibility. Disclosure of the invention

A portable information device, such as a notebook computer, provided with a high-performance heat insulating material that blocks heat transfer between an internal heat generating portion and an apparatus case without hindering the thickness reduction. This information device suppresses the temperature rise on the surface of the device and does not cause discomfort to the user. In addition, the information equipment is equipped with a high-performance heat-insulating material that blocks heat transfer between the internal heat-generating part and the built-in external extension equipment mounting case, and suppresses the temperature rise of the external extension equipment to prevent malfunction. . BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic diagram of a notebook computer according to Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of a notebook computer according to Embodiment 2 of the present invention.

FIG. 3 is a schematic diagram of a notebook computer according to Embodiment 3 of the present invention.

FIG. 4A and FIG. 4B are schematic diagrams of an extension device mounting case according to Embodiment 4 of the present invention.

FIG. 5 is a sectional view of a vacuum heat insulating material according to Embodiment 5 of the present invention.

FIG. 6 is a sectional view of a vacuum heat insulating material according to Embodiment 6 of the present invention.

FIG. 7 is a sectional view of a vacuum heat insulating material according to Embodiment 7 of the present invention.

FIG. 8 is a sectional view of a vacuum heat insulating material according to Embodiment 8 of the present invention. FIG. 9 is a schematic diagram of a notebook computer according to Embodiment 9 of the present invention.

FIG. 10 is a sectional view of a vacuum heat insulating material according to Embodiment 10 of the present invention. FIG. 11 is a sectional view of a vacuum heat insulating material according to Embodiment 11 of the present invention. FIG. 12 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 12 of the present invention. FIG. 13 is a sectional view of a vacuum heat insulating material according to Embodiment 13 of the present invention. FIG. 14 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 14 of the present invention. FIG. 15 is a sectional view of a notebook computer according to Embodiment 15 of the present invention.

FIG. 16 shows a mixing container according to Embodiment 16 of the present invention.

FIG. 17 shows a mixing container according to Embodiment 17 of the present invention.

FIG. 18 is a cross-sectional view of a vacuum heat insulating material according to Embodiments 18 to 23 and 25 of the present invention.

FIG. 19 is a sectional view of a vacuum heat insulating material according to Embodiment 24 of the present invention. FIG. 20 is a sectional view of a notebook computer according to Embodiment 26 of the present invention.

FIG. 21 is a sectional view of the vacuum heat insulating material of Comparative Example 3.1. BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1)

FIG. 1 shows a notebook computer 101 according to the first embodiment. The computer 101 is a vacuum insulation material 105 that shuts off between the heating part 103 on the internal main node 102 and the bottom of the device case 104, and a heat sink 106 And. Since this computer can effectively block heat transfer to the bottom surface, it suppresses temperature rise on the equipment surface and does not transmit heat to the user. (Embodiment 2)

FIG. 2 shows a notebook computer 101 according to the second embodiment. The computer box 101 is a vacuum insulation material 105 that blocks the heat-generating section 103 on the internal main board 102 between the heat-generating section 103 and the equipment case 104 at the bottom, and a heat sink 10 0 6 is provided. In this embodiment, the vacuum heat insulating material is formed into an L-shape in order to block the HDD and the heat generating portion. Since this computer effectively shuts off heat transfer to the bottom surface, it suppresses the temperature rise on the device surface and does not transfer heat to the user. In addition, it protects heat-sensitive parts such as the HDD 107 inside the equipment.

(Embodiment 3)

FIG. 3 shows a notebook computer 101 according to the third embodiment. The computer 101 is equipped with a vacuum insulation material 105 that cuts off between the heating section 103 on the internal main board 102 and the bottom of the equipment case 104, and a heating section 103. It is provided with a vacuum heat insulating material 109 for shutting off the space between the extension device mounting case 108 and a heat radiating plate 106. In order to effectively block heat transfer to the bottom, this computer suppresses temperature rise on the surface of the device and does not transmit heat to the user. Furthermore, since heat transfer to the external expansion device is effectively blocked, the temperature rise of the external expansion device is suppressed, and malfunction does not occur.

(Embodiment 4)

FIG. 4A is a perspective view of an extension device mounting case according to the fourth embodiment, and FIG. 4B is a side view of the case. A vacuum heat insulating material 109 is attached to the extension device mounting case 108. Is what it is. (Embodiment 5)

FIG. 5 is a sectional view of vacuum heat insulating material 105 or 109 according to the fifth embodiment, in which bag material 110 is filled with a core material made of inorganic powder 111.

(Embodiment 6)

FIG. 6 is a partially cutaway schematic view of the vacuum heat insulating material 105 or 109 according to the sixth embodiment, in which a bag material 110 is filled with a core material made of inorganic fibers 112. Is what it is.

(Embodiment 7)

FIG. 7 is a cross-sectional view of vacuum heat insulating material 105 or 109 according to Embodiment 7, in which bag material 110 is filled with a core material composed of inorganic powder 111 and inorganic fiber 112. Is what is being done.

(Embodiment 8)

FIG. 8 is a cross-sectional view of a vacuum heat insulating material 105 or 109 according to the eighth embodiment, in which a bag material 110 is filled with a core material made of a polyurethane communicating foam 113. .

(Embodiment 9)

FIG. 9 shows a notebook computer 101 according to the ninth embodiment. The computer 101 is a microporous body made of a dry gel that blocks between the heating part 103 on the internal main node 102 and the device case 104, and heat radiation. Plate Γθ 6. The vacuum heat insulating material according to the above embodiment of the present invention comprises a core material and a bag material. The core material is sealed in the bag material under reduced pressure. The internal pressure is desirably 100 t0 rr or less, and more desirably 100 torr or less. Also, an adsorbent may be used. In addition, the thickness of the vacuum heat insulating material is preferably 5 mm or less in order to reduce the thickness of the notebook computer. More preferably, it is 2 mm or less.

As the core material of the vacuum heat insulating material, open cells made of a polymer material such as polystyrene / polyurethane, inorganic and organic powders, and inorganic and organic fiber materials can be used. In particular, inorganic powders, inorganic fibers, and mixtures thereof are desirable.

The bag material is composed of a surface protective layer, a gas barrier layer, and a heat-sealing layer, and one or more films are laminated on each. As the surface protective layer, a polyethylene terephthalate film, a stretched product of a polypropylene film, or the like is used. As the gas barrier layer, a metal vapor-deposited film, an inorganic vapor-deposited film, a metal foil, or the like is used. As the heat-sealing layer, a low-density polyethylene film, a high-density polyethylene film, a polypropylene film, a polyacrylonitrile film, an unstretched polyethylene terephthalate film, or the like is used.

As the inorganic powder, powdered inorganic materials such as agglomerated silica powder, foamed pearlite powder, diatomaceous earth powder, calculated calcium powder, calcium carbonate powder, calcium carbonate powder, clay, and talc can be used. In particular, an agglomerated silicon powder having a secondary agglomerated particle diameter of 20 or less is preferable. As the inorganic fibers, fiberized inorganic materials such as glass wool, ceramic fiber, and rock wool can be used. The shape is not limited, such as non-woven fabric, woven fabric, and cotton. In addition, organic binder You may use a da.

The fine porous body made of dry gel is good, such as inorganic oxide air gel such as silica air gel and alumina air gel, and organic air gel such as polyurethane air gel, polyisocyanate air gel and phenolic air gel. A microporous body exhibiting excellent heat insulating properties can be applied. Also, a mixture of two or more air port gels may be used. As for the shape, any of a granular shape and a monolithic shape can be used.

In the above embodiment, the heat insulating material that blocks heat transfer between the internal heat generating portion and the device case and the heat insulating material that blocks heat transfer between the heat generating portion and the expansion device mounting case are respectively They may be used alone or together.

Examples of the heat insulating material will be described below. However, the heat insulating material is not limited to these. (Example 1.1)

Polyurethane communication foam was used as the core material of the vacuum heat insulating material. The bag material used was a polyethylene terephthalate film for the surface protective layer, an aluminum foil for the gas barrier layer, and a non-stretched polypropylene for the heat welding layer. The bag material was filled with polyurethane foam and sealed at a pressure of 0.1 torr to form a vacuum heat insulating material. The thickness of the vacuum insulation is 1.5 mm. The vacuum insulation was loaded into a notebook computer as shown in Fig. 1, and the bottom surface temperature was measured to be 46 ° C, which was 4 ° C lower than the blank, confirming the thermal insulation effect. (Example 1.2) Agglomerated silica powder was used as the core material of the vacuum heat insulating material. The same bag material as in Example 1.1 was used. The bag material was filled with the aggregated silica powder and sealed at a pressure of 0.1 t0 rr to obtain a vacuum heat insulating material. The thickness of the vacuum insulation is 1.5 mm. Vacuum insulation was loaded into a notebook computer as shown in Fig. 1, and the temperature at the bottom was measured. The temperature was 4 times lower than that of the blank, confirming the insulation effect. In addition, since it has flexibility, loading was easier than in Example 1.1.

(Example 1.3)

An inorganic fiber made of silica / alumina was used as a core material of the vacuum heat insulating material, and a bag material similar to that of Example 1.1 was used. The bag material was filled with inorganic fibers and sealed at a pressure of 0.1 torr to obtain a vacuum heat insulating material. The thickness of the vacuum insulation is 1.5 mm. Vacuum insulation was loaded into a notebook computer as shown in Fig. 1, and the temperature at the bottom was measured to be 5 ° C lower than the blank, confirming the insulation effect. In addition, since it is a fiber material, there is no dusting. The handleability was better than in Example 1.2. In addition, since it has flexibility, loading was easier than in Example 1.1.

(Example 1.4)

As the core material of the vacuum heat insulating material, a material obtained by previously mixing and molding a coagulated silica powder and an inorganic fiber made of silica / alumina was used. The same bag material as in Example 1.1 was used. The bag material was filled with a core material and sealed at a pressure of 0.1 torr to obtain a vacuum heat insulating material. The thickness of the vacuum insulation is 1.5 mm. Vacuum insulation was loaded into the notebook computer as shown in Fig. 1, and the bottom surface temperature was measured to be 5.5 ° C lower than the blank. The heat effect was confirmed. In addition, since the powder and the fiber were mixed, the pore diameter was smaller than in Examples 1.2 and 1.3, and the heat insulation performance was improved. The handleability was good. In addition, since it has flexibility, loading was easier than in Example 1.1.

(Example 1.5)

A monolithic silica air port gel with a thickness of 2 mm was used as the microporous body consisting of the dried gel. This silica air port gel was loaded into a notebook computer as shown in Fig. 6, and the bottom surface temperature was measured. The temperature was 4t lower than that of the blank, confirming the heat insulating effect. In addition, the silica air port gel can provide a heat insulating effect without vacuum evacuation, so that the manufacturing load was smaller than that of a vacuum heat insulating material.

(Comparative Example 1.1)

The temperature at the bottom of the notebook computer without any insulation was 50 ° C.

(Comparative Example 1.2)

Using a foamed urethane foam with a thickness of 1.5 mm as a heat insulating material, the temperature at the bottom when loaded into a notebook computer as in Example 1.5 was 1 ° C lower than the blank, The insulation effect was small.

(Embodiment 10).

FIG. 10 is a cross-sectional view of a vacuum heat insulating material 201 according to the tenth embodiment, in which a covering material 202 having a metal foil layer and a thermoplastic polymer layer has a Rica 203 and powdered carbon material 204 are uniformly dispersed and filled.

In vacuum insulation, the core material is encapsulated in the coating under reduced pressure. Physical adsorbents such as synthetic zeolite, activated carbon, activated alumina, silica gel, dawsonite, and talcite, and chemical adsorbents such as alkali metal and alkaline earth metal oxides and hydroxides. Alternatively, a moisture adsorbent or a gas adsorbent may be used. After the core material is sealed in the nonwoven fabric, it may be further sealed in the covering material. Further, the core material may be dried before vacuum sealing.

As the fumed silica, there can be used silicon oxide compounds having various particle diameters produced by dry methods, such as caic acid produced by an arc method, and caic acid produced by thermal decomposition. Also, mixtures of various particle size fumed silicas are available. For example, it is possible to use even a non-regular lot product in which the particle size generated when switching production between mass-produced product A and mass-produced product B with specified particle sizes is not controlled between A and B. In that case, it is possible to manufacture the vacuum insulation at a lower cost. If the heat insulation performance is the most important, it is preferable to use the one with an average primary particle diameter of 50 nm or less, and to further improve the performance, use the one with a diameter of 10 nm or less.

As the powdered carbon material, any powdered carbon material such as carbon black, graphitized carbon powder, activated carbon, and acetylene black can be used. Because it is versatile and inexpensive, it is easy to use Ribon Bon Black. However, when using carbon black, the specific surface area is preferably less than 100 m ² Zg in order to control gas generation over time and maintain excellent heat insulating performance over a long period of time. Also, for similar reasons, black The use of leaded carbon powder is also preferred.

As the covering material, a material that can block the core material from the outside air can be used. For example, metal sheets such as stainless steel, aluminum, and iron, and laminates of metal sheets and plastic films. The laminating material is preferably composed of a surface protective layer, a gas barrier layer, and a heat welding layer. As the surface protective layer, a stretched product of a polyethylene terephthalate film or a polypropylene film can be used. Furthermore, if a nylon film is provided on the outside, the flexibility is improved. The bending resistance is improved. As the gas barrier layer, a metal foil film of aluminum or the like or a metal-deposited film can be used, but a metal-deposited film is preferable for suppressing heat leak and exhibiting an excellent heat insulating effect. It is preferable to deposit a metal on a polyethylene terephthalate film, an ethylene-vinyl alcohol copolymer resin film, a polyethylene naphthalate film, or the like. As the heat-welding layer, a low-density polyethylene film, a high-density polyethylene film, a polypropylene film, a polyacrylonitrile film, a non-stretched polyethylene terephthalate film, or the like can be used.

(Embodiment 11)

FIG. 11 is a cross-sectional view of a vacuum heat insulating material 201 according to Embodiment 11, in which a coating material 202 having a metal foil layer and a thermoplastic polymer layer has an average primary particle diameter of 50 nm or less. A fumed silica 205 and a powdery carbon material 204 are uniformly dispersed and filled. (Embodiment 12) FIG. 12 is a cross-sectional view of a vacuum heat insulating material 201 according to Embodiment 12, in which a coating material 202 having a metal-deposited film layer and a thermoplastic polymer layer has a uniform uniform particle diameter of 50 nm. The following fumed silica 205 and carbon black 206 having a specific surface area of less than 100 m ² / g are uniformly dispersed and filled.

(Embodiment 13)

FIG. 13 is a cross-sectional view of a vacuum heat insulating material 201 according to Embodiment 13 in which a coating material 202 having a metal-deposited film layer and a thermoplastic polymer layer has a uniform uniform primary particle diameter of 50 nm. The following fumed silica 205 and graphitized carbon powder 2007 are uniformly dispersed and filled.

(Embodiment 14)

FIG. 14 is a cross-sectional view of the vacuum heat insulating material 201 according to the embodiment 14, in which a coating material 202 having a metal-deposited film layer and a thermoplastic polymer layer is added to a nonwoven fabric 210 in advance. Fumed silica 205 having an average primary particle diameter of 50 nm or less and carbon black 206 having a specific surface area of less than 100 m ² Zg are uniformly dispersed and filled It is. (Embodiment 15)

FIG. 15 is a cross-sectional view of the notebook computer 2 16 according to the embodiment 15. The heat generating section 2 18 on the main board 2 17 inside the apparatus and the bottom of the apparatus case 2 19 are cut off. It includes the vacuum heat insulating material 201 according to Embodiment 14 and a radiator plate 220. Insulation material 201 uses fumed silica, which has excellent heat insulation performance, as the base material, and the base material is evenly distributed with powdered foam. By being dispersed, it has better heat insulation performance than when only fumed silica is used as the core material. In addition, since the heat leak is suppressed by using the coating material having the metal-deposited film layer, the heat transfer to the bottom surface is effectively blocked. Therefore, the temperature rise on the device surface is suppressed and heat is not transmitted to the user. In addition, due to the appropriate powdered carbon material, there is no deterioration of heat insulation performance or deterioration over time due to an increase in internal pressure.

The notebook computer 1 is described as a typical example of a device that requires heat insulation in a range from an operating temperature range of room temperature to around 80 ° C, and is not particularly limited to this. For example, the present embodiment can be applied to heat insulation of a liquid crystal part of a car navigation system having a liquid crystal panel and a heat generating part by a CPU.

(Embodiment 16)

FIG. 16 shows a mixing vessel 2 33 having stirring blades 2 32 in the method for manufacturing a vacuum heat insulating material according to the embodiment 16. A stirring blade for uniformly dispersing the powder disintegrates fumed silica secondary or tertiary aggregates present in the raw material. As a result, the fumed silica and the powdered carbon material can be uniformly dispersed, so that deterioration of the heat insulation performance due to a partial decrease in the degree of dispersion can be suppressed.

(Embodiment 17)

FIG. 17 shows a mixing vessel 233 having stirring blades 232 in the method for manufacturing a vacuum heat insulating material according to the seventeenth embodiment. In the vessel 233, the blades 232 rotate, and further the mixing vessel itself rotates, or the bottom mouth 234 rotates. Thus, the powder is rotationally mixed. Fume in raw materials The time required to disintegrate the secondary or tertiary aggregates of dosilica is shorter than that of the mixing vessel according to Embodiment 16, and more efficient uniform dispersion can be achieved.

As the mixing vessel having a stirring blade in the method for producing a vacuum heat insulating material, a mixing container having a stirring blade capable of breaking secondary or tertiary aggregates of fumed silica present in the raw material can be used. The shape of the mixing vessel is not particularly limited, even if it is cylindrical, spherical, or cubic.

Examples according to the above embodiments will be described below. The present invention is not limited only to these.

(Example 2.1)

Fumed silica 8 9 wt% of the various average primary particle size of carbon black 1 0 wt% of the powdered specific surface area 5 0 as carbon emission material m ² Z g, other 1% of that, mixed with a stirring blade The material mixed uniformly in the container is used as the core material. The core material is filled in a bag made of polyester non-woven fabric, the surface protective layer is a polyethylene terephthalate film, the gas barrier layer is an ethylene / vinyl alcohol copolymer resin film that has been aluminum-evaporated, and the heat-welding layer is filling the coating material of the laminated bag of cast polypropylene, sealed with heat sealing device at a pressure 1 3 3 P a, the results of measuring the thermal conductivity of _t each vacuum heat insulating material to obtain a vacuum heat insulating material It is shown in Table 201. As is clear from Table 201, the thermal conductivity of fumed silica with various average primary particle diameters was 30% to 47% by adding carbon black as compared with fumed silica without addition. %. When the average primary particle diameter of the fumed silica is 50 nm or less, the improvement effect is 40% or more, which is particularly effective. (Table 201)

(Example 2.2)

89% by weight of fumed silica with an average primary particle size of 7nm, 10% by weight of carbon black with various specific surface areas as powdered carbon material, and 1% of others are uniformly mixed in a mixing vessel with stirring blades The resulting material is used as the core material. The core material was filled in a bag made of polyester nonwoven fabric, and the surface protective layer was made of polyethylene terephthalate film, and the gas barrier layer was made of aluminum / vinyl alcohol copolymer resin film by aluminum evaporation. The heat-sealing layer is filled into the covering material of the unstretched polypropylene laminate bag, and sealed with a heat-sealing device at a pressure of 133 Pa to obtain a vacuum heat insulating material. Table 202 shows the results of measuring the thermal conductivity of each vacuum heat insulating material. As is clear from Table 202, adding 10 wt% of carbon black having various specific surface areas to fumed silica has a thermal conductivity of 43% to 51% as compared with fumed silica without addition. Has been improved. A carbon black having a larger specific surface area has a greater effect of improving thermal conductivity. However, when carbon black having a specific surface area of 100 m ² / g or more is added, the thermal conductivity after 10 days of storage is slightly low. This is due to an increase in internal pressure due to gas generated from the power pump rack.

Even when carbon black having a specific surface area of 100 m ² Zg or more is used, the thermal conductivity does not decrease significantly because the added amount is 10% ₍

(Table 20)

(Example 2.3)

59% by weight of fumed silica with an average primary particle diameter of 7nm, 40% by weight of carbon black with various specific surface areas as powdered carbon material, and 1% of others are uniformly mixed in a mixing vessel with stirring blades The resulting material is used as the core material. The core material is filled into a bag made of non-woven fabric made of polyester, and the surface protective layer is made of polyethylene terephthalate film, the gas barrier layer is made of an ethylene / bier alcohol copolymer resin film, and the aluminum layer is deposited. Is filled into the coating material of the unstretched polypropylene laminating bag, and sealed with a heat fusion device at a pressure of 133 Pa to obtain a vacuum heat insulating material. Table 203 shows the measurement results of the thermal conductivity of each vacuum insulation material.

As is clear from Table 203, the addition of 40 wt% of carbon black with various specific surface areas to fumed silica improved the thermal conductivity from 37% to 43% compared to fumed silica without addition. Have been. However, when carbon black having a specific surface area of 100 m ² / g or more is added, the thermal conductivity after 10 days of aging is low. This is because the amount of carbon black added is 40 wt%, the gas generated from the carbon black increases the internal pressure, and the thermal conductivity is significantly affected by the addition of 1 wt%. It is because it has exerted.

(Table 203)

(Example 2.4)

Fumed silica with an average primary particle diameter of 7 nm 59 wt%, graphitized carbon powder with two specific surface areas as powdered carbon material 40 wt%, and other 1% in a mixing vessel with stirring blades The material uniformly mixed with the above is used as a core material. The core material is filled into a bag made of polyester non-woven fabric. Further, the surface protective layer is a polyethylene terephthalate film, the gas parier layer is an ethylene / vinyl alcohol copolymer resin film with aluminum vapor deposition, and the heat welding layer is Fill the coating material of the unstretched polypropylene laminate bag and seal it with a heat fusion device at a pressure of 133 Pa to obtain a vacuum heat insulating material. Table 204 shows the results of measuring the thermal conductivity of each vacuum heat insulating material. As is evident from Table 204, the addition of 40% by weight of graphitized carbon powder having two specific surface areas to fumed silica resulted in a thermal conductivity of 39% to 4% compared to fumed silica without addition. Up to 1%. The larger the specific surface area of the graphitized carbon powder, the greater the effect of improving the thermal conductivity.

In the graphitized carbon powder, there is no change in thermal conductivity after 10 days of aging. This is because there is no change in internal pressure due to gas generated over time from the graphitized carbon powder.

(Table 204)

(Example 2.5)

A mixing vessel with stirring blades containing fumed silica with an average primary particle diameter of 7 nm, 89 wt, carbon black with a specific surface area of 50 m ² / g as powdered carbon material, 10 wt%, and other 1% The material that is uniformly mixed inside is used as the core material. The core material is filled in a bag made of polyester non-woven fabric, and the surface protective layer is filled in a polyethylene terephthalate film, the gas barrier layer is made of aluminum foil, and the heat-sealing layer is made of unstretched polypropylene. Then, it is sealed with a heat sealing device under a pressure of 133 Pa to obtain a vacuum heat insulating material.

The measurement result of the actual thermal conductivity with a heat flow meter, taking into account the heat leak of the vacuum insulation material, is 0.033 kcal / mh ° C / mK.

(Example 2.6) The fumed silica and powdered carbon material as the core material, the mixing ratio, and the mixing method are the same as those in Example 2.5. The core material is filled in a bag made of polyester non-woven fabric, the surface protective layer is made of polyethylene terephthalate film, the gas barrier layer is made of ethylene-vinyl alcohol copolymer resin film, and the aluminum layer is heat-sealed. Fill the coating material of the unstretched polypropylene laminating bag and seal with a heat fusion device at a pressure of 133 Pa to obtain a vacuum heat insulating material.

The measurement result of the actual thermal conductivity with a heat flow meter, taking into account the heat leak of the vacuum insulation material, was 0.028 kca 1 Zm h ° C. In Example 2.5, the gas barrier layer was made of aluminum foil. Thermal conductivity is improved compared to the specification. This is because heat leak was suppressed because the gas barrier layer of the coating material was formed by depositing aluminum on an ethylene-vinyl alcohol copolymer resin film. (Example 2.7)

Has a fumed silica force with an average primary particle diameter of 7 nm 8.9 wt%, a pump surface with a specific surface area of 50 m ² / g as powdered carbon material, 10 wt%, and other 1%, with stirring blades By further rotating the rotor at the bottom, a material uniformly mixed in the mixing vessel is used as a core material. The core material is filled into a bag made of polyester non-woven fabric, the surface protective layer is made of polyethylene terephthalate film, the gas barrier layer is made of ethylene-vinyl alcohol copolymer resin film, and the heat-welding layer is not stretched. Fill the coating material of the polypropylene laminate bag and seal it with a heat fusion device at a pressure of 133 Pa to obtain a vacuum heat insulating material.

A heat flow meter of real thermal conductivity, taking into account the heat leak of this vacuum insulation material, The measurement result is 0.028 kca 1 / mh ° C, which is the same as in Example 2.6.

However, since it has stirring blades and further rotates the bottom rotor to mix the core material, the mixing time is reduced by 20% as compared with Example 2.6.

(Example 2.8)

In Example 2.1, the temperature of the bottom of a notebook computer loaded with vacuum insulating material with a fumed silica average primary particle diameter of 7 nm as shown in Fig. 15 was measured using a vacuum insulating material. 5 ° C lower than none. In addition, in the evaluation of the deterioration of the heat insulating material by the accelerated test, deterioration of the heat insulating performance under the condition of 10 years cannot be confirmed.

(Comparative Example 2.1)

The core material of the vacuum heat insulating material, mixing with an average particle size 8 pearlite powder 9 0 wt% of Zzm, the powdered carbon material as a carbon black-click a specific surface area of 5 0m ² Zg 1 0 wt% and a stirring blade and Use a homogeneous mixture in the container. The core material is filled into a bag made of non-woven fabric made of polyester, and the surface protective layer is filled into a laminated bag made of polyethylene terephthalate film, the gas ply layer is made of aluminum foil, and the heat-sealing layer is made of unstretched polypropylene. At a pressure of 133 Pa, sealing is performed with a heat sealing device to obtain a vacuum heat insulating material.

The thermal conductivity of this vacuum heat insulating material is 0.052 kcal / mh ° C. The thermal conductivity of the vacuum heat insulator made of perlite powder alone is 0.065 kca 1 Zmh ° C. Therefore, adding 10% by weight of bonbon black to parlite powder only reduced the amount by 20%. The effect of improving the heat insulation performance is small. (Comparative Example 2.2)

The core material of the vacuum heat insulating material, an average grain size of 2 4 pearlite powder 9 0 wt% of m, a powdery carbon material as a specific surface area of 5 0 m ² / g force first pump rack 1 0 wt% of agitation Use a mixture that has been uniformly mixed in a mixing vessel having blades. The core material is filled into a bag made of polyester non-woven fabric, and furthermore, the surface protective layer is made of polyethylene terephthalate film, the gas barrier layer is made of aluminum foil, and the heat-sealing layer is made of unstretched polypropylene. Seal with a heat sealing device at a pressure of 133 Pa to obtain a vacuum heat insulating material. '

The thermal conductivity of this vacuum heat insulator is 0.0500 kcal Zmh ° C. The thermal conductivity of the vacuum heat insulator made of pearlite powder alone is 0.058 kca1 / mhC. By adding 10 wt% of carbon black to the perlite powder, only the conductivity decreases by 15%, and the effect of improving the heat insulation performance is smaller than in the present embodiment.

(Comparative Example 2.3)

The core material of the vacuum insulation material is agitated with 90 wt% of wet-type silica with an average primary particle diameter of 20 nm and 10 wt% of a carpump rack with a specific surface area of 50 m ² Zg as a powdered carbon material. Use a mixture that has been uniformly mixed in a mixing vessel having blades. The core material is filled into a bag made of polyester non-woven fabric, and furthermore, the surface protective layer is made of polyethylene terephthalate film, the gas barrier layer is made of aluminum foil, and the heat-sealing layer is made of unstretched polypropylene. Sealed with a heat fusion device at a pressure of 13 3 Pa to obtain a vacuum insulation material You.

The thermal conductivity of this vacuum heat insulating material is 0.049 kcal / mh ° C. The vacuum insulation of the powdered powder alone is 0.062 kcal Zmh ° C. By adding 10 wt% of carbon black to wet silica, only the conductivity is reduced by 20%, but the effect of improving the heat insulating performance is small as compared with the present embodiment.

(Comparative Example 2.4)

90 wt% of fumed silica with an average primary particle diameter of 7 nm, 9 wt% of carbon black with a specific surface area of 50 m ² / g as a powdered carbon material, and 1% of other, without stirring blades, bottom The material mixed and stirred with only the rotor is used as the core material. The lumps of fumed silica are generated in the core material because the materials are not uniformly mixed. The core material is filled in a bag made of polyester non-woven fabric, the surface protective layer is made of polyethylene terephthalate film, and the gas barrier layer is made of ethylene-vinyl alcohol copolymer resin film with aluminum vapor deposited, heat welding The layer is filled into the coating material of a laminated bag of unstretched polypropylene and sealed with a heat sealing device under a pressure of 133 Pa to obtain a vacuum heat insulating material.

The thermal conductivity of this vacuum heat insulating material is 0.0048 kcal Zmh ° C. Since the secondary aggregates of the fumed silica are not uniformly mixed with the carbon black without being crushed, the heat insulating performance improving effect is significantly reduced.

(Comparative Example 2.5)

Comparative Example 2.3 The temperature at the bottom of a notebook computer loaded with the vacuum insulation material shown in Fig. 15 as shown in Fig. 15 is 2 ° C lower than that without vacuum insulation material. However, the heat insulation effect is lower than in Example 2.8.

(Embodiment 18)

FIG. 18 is a cross-sectional view of the vacuum heat insulating material according to Embodiment 18.

The vacuum insulation material 301 includes a molded body 302 mixed with powder 303 and a fiber material 304, and a covering material 300 covering the molded body 302. You.

The molded body 302 is prepared by uniformly mixing 90 wt% of dry silica having an average primary particle diameter of 7 nm and 1 Owt% of glass wool having an average fiber diameter of 7 in a cut-and-mill, put into a molding die, and press. pressure 1. is pressurized molding in ² N / mm 2. The molding density of the molded body 302 was 190 kgZm ³ under the atmospheric pressure, and the thermal conductivity under the atmospheric pressure was 0.026 W / mK. The bending strength of the molded body 302 is 0.21 N / mm ² .

The molded body 302 is dried at 110 ° C. for 1 hour, inserted into the jacket material 304, and the interior of the jacket material 105 is reduced in pressure to 20 Pa and sealed.

The outer cover material is made of a polyethylene terephthalate (thickness: 12 m) surface protective layer and an aluminum vapor deposition inside the ethylene-vinyl alcohol copolymer resin composition (thickness: 15 ■ Aim). And a heat-sealed layer of high-density polyethylene (50 rn thick).

Enveloping members 3 0 5 is 4-side sealed, _t vacuum heat insulator 3 0 1 thermal conductivity fin 3 0 6 is generated in the periphery 0. 0 0 6 2 W / mK at average temperature 24 It is.

The thickness change rate で T between the thickness D 310 of the molded body before the jacket material is introduced and the thickness D 302 of the vacuum insulation material after fabrication is T

AT = (D 3 0 2 -D 3 0 1) X 1 0 0 / D 3 0 1 = 2% It is.

The results are shown in Table 301.

(Embodiment 19)

FIG. 18 is a cross-sectional view of the vacuum heat insulating material according to the nineteenth embodiment.

The vacuum heat insulating material 301A includes a molded body 302A. Dry powder with a mean particle diameter of 7 nm 85.5 wt% and a carbon black with a mean particle diameter of 42 nm 4.5 wt% mixed powder 303 A, and fiber material 304 as the average fiber A molded body 302A is formed by mixing 10 wt% of glass wool having a diameter of 7.

After the powder 3 0 3 A were mixed in a cutter mill, further added and mixed fiber material 3 04, placed in a mold, press pressure: 1. molding pressurized formation Form 3 0 2 A at 2 N / mm ² I do. The molding density of the molded body 302 A is 19 O kg / m ³ under the atmospheric pressure, and the thermal conductivity under the atmospheric pressure is 0-022 W / mK. This is a thermal conductivity superior to static electricity. Even if this molded body is used as it is under normal pressure without using it as a vacuum heat insulating material, it has a heat insulating effect.

The bending strength of the molded body 302 A is 0.21 NZmm ² .

The molded body 302A is dried at 110 ° C for 1 hour, inserted into a jacket material 350, and the inside is reduced to 20 Pa and sealed. The outer cover material 304 is the same as that of the eighteenth embodiment.

The thermal conductivity of the vacuum insulation material 301 A is 0.05 WZ mK at an average temperature of 24 ° C.

The thickness change rate ΔΤ between the thickness D 310 of the molded body before inserting the jacket material and the thickness D 302 after the production of the vacuum heat insulating material is

Δ T = (D 3 0 2 -D 3 0 1) X 1 0 0 / D 3 0 1 = 2% It is.

The results of this evaluation are shown in Table 301.

Compared to the vacuum heat insulating material 301 described in Embodiment 18, the addition of the carbon black significantly reduces the thermal conductivity.

(Embodiment 20)

FIG. 18 is a cross-sectional view of the vacuum heat insulating material according to Embodiment 20.

The vacuum heat insulating material 301B includes a molded body 302B. Powder 0.30 B, which is a mixture of dry silica 85.5 wt% with an average primary particle diameter of 7 nm and 4.5 wt% of titanium oxide with an average particle diameter of 60 nm, and an average fiber diameter as a fiber material 304 A molded body 302B is formed by mixing 7 m of glass wool 1 Owt%.

After mixing the powder 3 0 3 B cutlet evening in one mill, further added and mixed fiber material 3 04, placed in a mold, press pressure 1 - pressurized formed form at ^{2 N / mm 2 3 0 2} B Mold. Molding density of the molded body 3 0 2 B is 1 8 O k gZm ³ under atmospheric pressure, thermal conductivity at atmospheric pressure Ru 0. 0 2 5 W / mK der.

The bending strength of the molded body 302B is 0.2 N / mm ² .

The molded body 302B is dried at 110 ° C for 1 hour, inserted into a jacket material 350, and the inside is reduced to 20 Pa and sealed. The covering material 2005 is the same as that of the embodiment 18.

The thermal conductivity of the vacuum insulation material 301 B is 0.062 W ZmK at an average temperature of 24.

The thickness change rate ΔT of the thickness D 310 of the molded body before the jacket material is introduced and the thickness D 302 of the vacuum body after the production of the vacuum heat insulating material is Δ T = (D 3 0 2 -D 3 0 1) XI 0 0 / D 3 0 1 = 2%

It is.

The results of this evaluation are shown in Table 301.

Although there is no difference in the solidification strength as compared with the vacuum heat insulating material 301 described in Embodiment 18, there is almost no effect of reducing the thermal conductivity by adding titanium oxide.

(Embodiment 21)

FIG. 18 is a cross-sectional view of the vacuum heat insulating material according to Embodiment 21.

The vacuum heat insulating material 301C includes a molded body 302C. Dry silica 90 with a uniform uniform particle diameter of 7 nm as powder 303, fiberglass material 304 w A fiber wool with an average fiber diameter of 0.

2C is molded.

Molded product 302C is produced in the same manner as in Embodiment 18. The compacting density of the molded body 302 C is 180 kg / m ³ under atmospheric pressure, the thermal conductivity under atmospheric pressure is 0.025 W / mK, and the bending strength is 0.24 N / mm. ²

The vacuum heat insulating material 301C is produced using the molded body 302C in the same manner as in Embodiment 18. The covering material 304 is the same as that of the embodiment 18.

The thermal conductivity of the vacuum insulation material 301 C is 0.057 WZmK at an average temperature of 24. The thickness change rate is 1%.

The results of this evaluation are shown in Table 301.

Compared with the vacuum heat insulating material 301 described in Embodiment 18, by making the fiber diameter of the fiber material finer, the thermal conductivity, the bending strength, and the thickness change rate are improved.

(Embodiment 2 2) FIG. 18 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 22.

The vacuum heat insulating material 301D includes a molded body 302D. A powder obtained by mixing 85.5 wt% of dry silica with an average primary particle diameter of 7 nm and 4.5 wt% of a carbon black with an average particle diameter of 42 nm, and a powder of 0.3 A with an average fiber diameter of 0.8 m A molded body 302D is formed by mixing glass wool 304 A10 wt%.

Molded body 302D is produced in the same manner as in Embodiment 19. The molding density of the compact 302 D is 180 kg / m ³ at atmospheric pressure, the thermal conductivity at atmospheric pressure is 0.02 W / mK, and the bending strength is 0.25 NZmm ² .

Vacuum heat insulating material 301D is produced in the same manner as in Embodiment 19 using molded object 302D. The covering material 304 is the same as that of the embodiment 19.

The thermal conductivity of the vacuum insulation material 301D is 0.0044W ZmK at an average temperature of 24 ° C, and the thickness change rate is 1%.

The results of this evaluation are shown in Table 301.

Compared to the vacuum heat insulating material 301 described in Embodiment 18, the addition of a force pump rack and the finer fiber diameter of the fibrous material significantly increase the thermal conductivity, bending strength, and thickness change rate. Improved.

(Embodiment 23)

FIG. 18 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 23.

The vacuum heat insulating material 301E includes a molded body 302E. As a powder 3003 A and a fiber material 304 A mixed with 85.5 wt% of dry silica with an average primary particle diameter of 7 nm and 4.5 wt% of a carbon black with an average particle diameter of 42 nm A molded body 302E is molded by mixing with 10% by weight of glass wool having an average fiber diameter of 0.8 xm. Shaped body 30 2 E, except that the pressing pressure and 0. 4 NZmm ² is prepared in the same manner as in Embodiment 1 9 embodiment. The molding density of the compact 302E is 140 kg / m ³ under atmospheric pressure, the thermal conductivity under atmospheric pressure is 0.02 W / mK, and the bending strength is 0.14N7mm ² .

Vacuum heat insulating material 301E is produced in the same manner as in Embodiment 19 using molded object 302E. The jacket material 305 having the same specifications as in the nineteenth embodiment was used.

The thermal conductivity of the vacuum insulation material 301E is 0.0042 W mK at an average temperature of 24 ° C, and the thickness change rate is 3%.

The results of this evaluation are shown in Table 301.

As compared with the vacuum heat insulating material 301D described in the twenty-second embodiment, lowering the pressing pressure improves the thermal conductivity but lowers the bending strength.

(Embodiment 24)

FIG. 19 is a sectional view of a vacuum heat insulating material according to the twenty-fourth embodiment.

The vacuum heat insulating material 301F includes a molded body 302F. Fiber material consisting of powdered 303C, which is a mixture of 85.5 wt% of fumed silica with an average primary particle diameter of 56 nm and 9.5 wt% of force-pour black having an average particle diameter of 42 nm, and glass wool with an average fiber diameter of 7 m The molded body 302F is molded by mixing 304 with 5 wt%.

Dry silicide force, carbon black and glass wool are simultaneously mixed by a cutter mill, put into a molding die, and pressurized at a pressing pressure of 1.2 NZmm ^{2 to} form a molded body 302F.

In the molding density thermal conductivity under 1 80 k / m atmospheric pressure at atmospheric pressure 0. OZ lWZmK flexural strength of the molded body 302 F is 0. ² 1 NZmm 2 is there.

The molded body 302F is dried at 110 ° C for 1 hour, inserted into the outer material 300A together with the adsorbent 307, and the inside of the outer material 205A is exposed to 20 Pa. Reduce pressure and seal.

One side of the jacket material is a nylon film (thickness: 15 m) on the outermost layer, polyethylene terephthalate (thickness: 12 m) as a surface protective layer, and an aluminum foil (thickness: 6 m) in the middle A small laminar film in which the heat sealing layer is made of high-density polyethylene (thickness: 50 zm). On the other side, the outermost layer is a nylon film (15 m thick), the surface protective layer is polyethylene terephthalate (12 m thick), and the middle part is an ethylene-vinyl alcohol copolymer resin composition (thickness). It is a laminated film made of high-density polyethylene (thickness: 50 zm) with a film layer with aluminum vapor deposited inside and a heat sealing layer.

The adsorbent 307 is a moisture adsorbent made of granular calcium oxide put in a moisture-permeable bag.

The thermal conductivity of the above vacuum insulating material 301 F is 0.0049 WZmK at an average temperature of 24 ° C, and the thickness change rate is 1%.

The results of this evaluation are shown in Table 301.

Compared to the vacuum heat insulating material 301 A described in Embodiment 19, the thermal conductivity of the powder is deteriorated by the increase in the particle size, but the vacuum heat insulating material 301 A is reduced by the decrease in the amount of the fiber material added. It has equivalent thermal conductivity.

The addition of the adsorbent 307 improves the reliability over time.

(Embodiment 25)

FIG. 18 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 25. The vacuum heat insulating material 301G includes a molded body 302G. Powder 303 D, which is a mixture of 64 wt% of dry silica having an average primary particle diameter of 7 nm and 16 wt% of carbon black having an average particle diameter of 3 O nm, and 1 Owt% of silica alumina fiber having an average fiber diameter of 1 and average fiber A molded product 302G is formed by mixing a fiber material 304B mixed with 1 Wt% of glass wool having a diameter of 8 m.

Molded product 302G is produced in the same manner as in Embodiment 19, except that the pressing pressure is 1.5 N / mm ² . The molding density of the green body 302 G is 200 kgZm ³ under the atmospheric pressure, the thermal conductivity under the atmospheric pressure is 0.22 WZmK, and the bending strength is 0.23 N / mm ² .

The molded body 302G is dried at 110 ° C. for 1 hour, introduced into the jacket material 305B, and the inside of the jacket material 305B is reduced in pressure to 20 Pa and sealed. One side of the jacket material 305B is a film layer with nylon (12-zm thick) on the outermost layer, polyethylene naphthalate (12-m thick) in the middle, and aluminum on the inside, and ethylene on the inside. The film layer and the heat-sealing layer on which aluminum is deposited on the outside of a vinyl alcohol copolymer resin film (thickness: 12 m) are made of polypropylene (thickness: 50 m). On the other side, the outermost layer is nylon (thickness 12 / xm), the surface protective layer is polyethylene terephthalate (thickness 12 m), the middle part is aluminum foil (thickness 6 m), and the heat seal layer is polypropylene. (50 m thick).

The thermal conductivity of the vacuum insulation material 301 G is 0.0050 W ZmK at an average temperature of 24 ° C, and the thickness change rate is 1%.

The results of this evaluation are shown in Table 301.

Fiber diameter finer compared to vacuum insulation material 301 A according to Embodiment 19. The fibers are blended in consideration of the balance between the reduction in thermal conductivity due to the increase in the thermal conductivity and the reduction in cost due to the increase in the fiber diameter. By increasing the pressing pressure, a vacuum insulation material with the same thermal conductivity but excellent bending strength and thickness change rate can be obtained.

(Table 31)

Structure of core material

Powder fiber

Nirica

Dry carbon glass

Other Alumina Press pressure Siri force Black wool

wt¾ m-(N / mm ² ) wt% wt% ϊ%

(Particle size) t¾

(Particle diameter) (Particle diameter) (Fiber diameter)

Embodiment 90 wt% 10 wt%

1.

1 8 (nmj

Embodiment 85.5 t% 4.5wt¾ I0wt%

1.2 1 9 1 nni (tsu m

ί μΠΐ,

Titanium oxide

Embodiment 85.5wt% 10wt¾

4.OWlA 1.2 2 0 (7nm) (7μηι)

(60nm)

Embodiment 90wt¾ 10wt¾

1.2 2 1 (7nm) (0.8μπι)

Embodiment 85.5wt¾ 4.5wt¾ 10wt¾

1.2 2 (7nm) (42nm) (0.8μΒΐ)

Embodiment 85.5wt% 4.5wt¾ 10wt¾

0.4 2 3 (7nm) (42nm) (0.8μΐη)

Embodiment 85.5wt% 9.5wt¾ 5wt¾

1.24 (7nm) (42nm) (7μηι)

Embodiment 64wt% 16wt¾ 10wt¾ 10wt¾

1.2 2 5 (7nm) (30nm) (8μΠΐ) (1.Ιμπι) Characteristics of core material and vacuum insulation

Bending thickness Thermal conductivity Density

Strength change rate (W / mK) (kg / m ³ )

(N / mm ² ) (¾) Embodiment Normal pressure 0.026

190 0.21 2 1 8 20Pa 0.0062

Embodiment Normal pressure 0.0022

190 0.21 2 1 9 20Pa 0.005

Embodiment Normal pressure 0.0025

180 0.2 2 2 0 20Pa 0.0062

Embodiment Normal pressure 0.025

180 0.24 1 2 1 20Pa 0.0057

Embodiment Normal pressure 0.02

180 0.25 1 2 2 20Pa 0.0044

Embodiment Normal pressure 0.02

140 0.14 3 2 3 20Pa 0.0042 Embodiment Normal pressure 0.021

180 0. 21 1

2 4 20Pa 0.0049

Embodiment Normal pressure 0.22

200 0.23 1

2 5 20Pa 0.005

(Embodiment 26)

FIG. 20 is a sectional view of the notebook computer according to Embodiment 26.

The notebook computer 308 is a vacuum heat insulator 310 and a radiator plate 31 that shuts off the space between the heating section 310 on the main port 309 inside the device and the bottom of the device case 310. And 2.

The material and manufacturing method of the vacuum heat insulating material 301D are the same as those in Embodiment 22. The size of the formed body in the vacuum heat insulating material 301D is 60 × 60 × 1 mm. The fin portion 303 of the jacket material 305 generated around the vacuum heat insulating material 301D is bent, and the radiator plate 12 is provided on the surface in the bent direction.

The temperature at the bottom of the laptop 308 is 5 ° C lower than that of a laptop without vacuum insulation. In addition, accelerated tests did not confirm any deterioration in thermal insulation performance after 10 years.

(Comparative Example 3.1)

FIG. 21 is a sectional view of the vacuum heat insulating material of Comparative Example 3.1.

The vacuum heat insulating material 301a includes a compact 302a mixed with the powder 303a and the fiber material 304. The molded body 302a is inserted into the jacket material 304, and the interior of the jacket material 300 is reduced in pressure and sealed.

90 wt% of dry silica having an average secondary particle diameter of 150 nm as powder 303 a, and glass wool having an average fiber diameter of 7 m 1 as fiber material 304 And 0 wt% are uniformly mixed with a cutter mill, put into a mold, and pressurized at a press pressure of 1.2 N / mm ^{2 to} form a molded body 302a.

The molded body 302a is very fragile, partly collapsed when held in hand, and severely dusted.

Molding density of the molded body 3 0 2 a is the thermal conductivity of the under 2 5 0 kgm atmospheric pressure at atmospheric pressure 0. OS SWZmK :, flexural strength is 0. 0 3 NZmm ^2.

The molded body 302a is dried at 110 ° C for 1 hour, carefully placed on a plastic plate, and inserted into the jacket material 350. The plastic plate is taken out, and the inside of the jacket material 305 is reduced in pressure to 20 Pa and sealed. The covering material 304 is the same as that of the embodiment 18.

The thermal conductivity of the vacuum insulation material 301a is 0.068 W / mK at an average temperature of 24: the thickness change rate is 7%, and the surface is rough.

Therefore, it cannot be applied to equipment that requires thin vacuum insulation such as personal computers.

Table 302 shows the evaluation results of the vacuum insulating material 301a.

Compared to the vacuum heat insulating material described in Embodiment 18, since a powder having a large particle diameter is used, it is difficult to obtain a compact and the bending strength is low. (Comparative Example 3.2)

FIG. 21 is a cross-sectional view of the vacuum heat insulating material of Comparative Example 3.2.

The vacuum heat insulating material 301b includes a molded body 302b. Powder 0.30 b mixed with wet silica 85.5 wt% of average primary particle diameter 1 2 0 11111 and 4.5 wt% of carbon black with average particle diameter of 42 nm, and average fiber diameter as fiber material 304 7 im glass wool 10 wt% and mixed 302b is molded.

After the powder 3 0 3 b were mixed in a cutter mill, further added and mixed fiber material 3 04, placed in a mold, press pressure 1 - ² N / mm 2 at pressurized formation Form 3 0 2 b is molded Is done.

The molded body 302b is very fragile, partly collapsed when held in hand, and severely dusted.

The molding density of the molded body 302 ^b is 250 kg / m ³ at atmospheric pressure, the thermal conductivity at atmospheric pressure is 0.028 W / mK, and the bending strength is 0.03 NZmm ² It is.

The molded body 302 b is dried at 110 ° C. for 1 hour, placed on a plastic plate, and carefully inserted into the covering material 350. The plastic material 305 is taken out of the plastic plate, and the inside thereof is reduced in pressure to 20 Pa and sealed. The covering material 304 is the same as that of the embodiment 18.

The thermal conductivity of the vacuum insulation material 301 b is 0.053 W / mK at an average temperature of 24: the thickness change rate is 7%, and the surface is rough.

The results of this evaluation are shown in Table 302.

Compared with the vacuum heat insulating material 301A according to Embodiment 19, since a powder having a large particle diameter is used, it is difficult to obtain a compact and the bending strength is small.

(Comparative Example 3.3)

FIG. 21 is a cross-sectional view of the vacuum heat insulating material of Comparative Example 3.3.

The vacuum heat insulating material 301c includes a molded body 302c. Powder 3O3c, which is a mixture of 45% by weight of dry silica with an average primary particle diameter of 7nm and 45% by weight of wet silica with an average primary particle diameter of 13nm, and a fiber material 304 with an average fiber diameter of 7 πι of glass wool and 10 wt% are mixed together to form a molded body 302 c. Is shaped.

After mixing the powder 303 c cutlet evening in one mill, further added and mixed fiber material 304, placed in a mold, pressed mold body 302 c at a pressing pressure of 1 NZmm ² is molded.

Molded product 302c is very fragile, partly collapsed when held in hand, and severely dusted.

The compacting density of the compact 302c is 230 kg / m ³ at atmospheric pressure, the thermal conductivity under atmospheric pressure is 0.028 WZmK, and the bending strength is 0.05 NZmm ² .

The molded body 302 c is dried at 110 ° C. for 1 hour, carefully placed on a plastic plate, and inserted into the outer cover material 305. The plastic material 305 is taken out of the plastic plate, and the inside is reduced in pressure to 20 Pa and sealed. The covering material 305 is the same as that of the eighteenth embodiment.

The thermal conductivity of the vacuum insulation material 301c is 0.0064 W / mK at an average temperature of 24, the thickness change rate is 6%, and the surface is rough.

Table 302 shows the results of this evaluation.

Compared to the vacuum heat insulating material 301 described in Embodiment 18, since a wet silica having a large particle diameter is blended, it is difficult to obtain a molded product, and the bending strength is small.

(Table 30)

Industrial applicability

According to the present invention, a portable information device, such as a thin notebook computer, provided with a high-performance heat insulating material capable of blocking heat transfer between an internal heat generating portion and a device case and suppressing a temperature rise on the device surface. I will provide a. In addition, a portable information device that is equipped with a high-performance heat insulating material that blocks heat transfer between the heating section and the extension device mounting case, and that suppresses malfunction and temperature rise of external extension devices is provided.

Claims

The scope of the claims

1. Case and

A heat-generating part disposed in the case;

A heat insulating material disposed between the case and the heat generating portion;

Portable information equipment with.

2. The portable information device according to claim 1, further comprising a heat radiating plate disposed in the case and radiating heat generated in the heat generating portion.

3. Case and

A heating section arranged in the case;

An extension device mounting case disposed in the case; and a heat insulating material disposed between the heat generating portion and the extension device mounting case.

Portable information equipment with.

4. Case and

A heating section arranged in the case;

An extension device mounting case which is disposed in the case and has heat insulating material;

Portable information equipment with.

5. The portable information device according to any one of claims 1 to 4, wherein a thickness of the heat insulating material is 5 mm or less.

6. The portable information device according to any one of claims 1 to 5, wherein the heat insulating material is a vacuum heat insulating material.

7. The portable information terminal according to claim 6, wherein the vacuum heat insulating material includes a core material made of an inorganic powder.

8. The portable information device according to claim 6, wherein the vacuum heat insulating material includes a core material made of inorganic fibers.

9. The portable information device according to claim 6, wherein said vacuum heat insulating material includes a core material composed of inorganic powder and inorganic fiber.

10. The portable information device according to claim 6, wherein the vacuum heat insulating material includes a core material made of fumed silica containing at least 1 wt% or more of powdered carbon, and a covering material for containing the core material.

1 1. The portable information device according to claim 10, wherein the fumed silica has an average primary particle diameter of 50 nm or less.

12. The portable information device according to claim 10 or 11, wherein the powdered force pump is a force pump rack having a specific surface area of less than 100 m ² Zg.

1 3. The powdered carbon is a specific surface area of 3 00111 ^2/8 less than 1 00m ² Z g or more carbon blacks, the fumed silica contains less 3 0 wt% of the powdered carbon, claims first 0 or 1 1 Portable information device.

14. The portable information device according to claim 10 or 11, wherein the powdered carbon is a graphitized carbon powder.

15. The mobile phone according to any one of claims 10 to 14, further comprising a nonwoven fabric disposed between the core material and the covering material and covering the core material.

16. The portable information device according to any one of claims 10 to 15, wherein the covering material includes a metal-deposited film layer and a thermoplastic polymer layer.

1 7. The vacuum heat insulating material comprises: a molded body containing dry-type silica having an average primary particle diameter of 100 nm or less and a fiber material having an average fiber diameter of 10 m or less; and a jacket material having gas barrier properties. The portable information device according to claim 6, comprising:

18. The portable information device according to claim 17, wherein the molded body further includes a powder-like force.

1 9. The portable information device according to claim 1, wherein the heat insulating material is a microporous body made of a dried gel and having a thickness of 5 mm or less.