WO2011111535A1 - Dispositif de retenue de la chaleur et chauffe-eau électrique - Google Patents

Dispositif de retenue de la chaleur et chauffe-eau électrique Download PDF

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Publication number
WO2011111535A1
WO2011111535A1 PCT/JP2011/054076 JP2011054076W WO2011111535A1 WO 2011111535 A1 WO2011111535 A1 WO 2011111535A1 JP 2011054076 W JP2011054076 W JP 2011054076W WO 2011111535 A1 WO2011111535 A1 WO 2011111535A1
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WIPO (PCT)
Prior art keywords
heat
sheet
resin film
stretching
cavities
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PCT/JP2011/054076
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English (en)
Japanese (ja)
Inventor
靖友 後藤
広樹 佐々木
徹 小倉
伸輔 高橋
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富士フイルム株式会社
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Publication of WO2011111535A1 publication Critical patent/WO2011111535A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/181—Construction of the tank
    • F24H1/182—Insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/185—Water-storage heaters using electric energy supply
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds

Definitions

  • the present invention relates to a heat insulator that can be used for an electric water heater or the like.
  • Electric appliances such as electric water heaters and refrigerators have a heat retention function for maintaining the internal temperature.
  • Electric water heaters use electric power to boil water, but electric power is also used for heat retention after the water is boiled.
  • the heat insulating material is used in order to suppress the electric power used for heat retention.
  • electric power is used in refrigerators to retain heat in cold storage rooms and cold rooms, and heat insulating materials are used to suppress the use of electric power.
  • a reduction in energy consumption is desired. If the electrical appliance can be kept warm with low power consumption, energy consumption can be reduced. Furthermore, heat can be effectively utilized.
  • the heat A member As a heat-retaining member that can be used in an electric water heater or the like, a core material such as glass wool, and a jacket material of a laminated structure having a heat-welded layer, a gas barrier layer, and a protective layer, the heat A member has been proposed in which the welding layer is made of a resin film having a melting point of 200 ° C. or higher, and the melting point of the resin film of the gas barrier layer and the protective layer is higher than the melting point of the resin film of the thermal welding layer (for example, Patent Documents). 1).
  • This member can be used even in a high temperature environment and can retain heat for a long time.
  • this member since this member uses glass wool or the like as the core material, the member is not sufficiently flexible, and it is difficult to arbitrarily deform the member according to the shape of the heat source. Therefore, when the said member is used for the apparatus which consists of a heat source and the said member, there exists a problem that the freedom degree of design of an apparatus becomes low.
  • a metal-deposited plastic film has been proposed as a film having heat retention (see, for example, Patent Document 2).
  • This proposed metal-deposited plastic film is formed of a metal-deposited film and a porous plastic film having a cavity.
  • This metal-deposited plastic film has the advantage that the adhesion strength of the metal-deposited film is high.
  • this porous plastic film has a cavity and is a structure that enhances heat retention, the cavity has a structure in which many of the cavities are connected to each other at specific points, and is not an independent cavity. Since the orientation and shape of the cavities are not controlled, there is a problem that the heat retaining property of the porous plastic film is not sufficient. Further, there is a problem that the size of the article cannot be sufficiently reduced depending on the arrangement of the porous plastic film with respect to the heat source.
  • an object of the present invention is to provide a heat insulator capable of effectively utilizing heat and having a high degree of design freedom.
  • Means for solving the problems are as follows. That is, ⁇ 1> It has a heat source and a sheet, The distance between the heat source and the sheet is 1.0 mm or more and 50 mm or less, The sheet has at least a resin film having an independent cavity, The cavity in the resin film is oriented perpendicular to the thickness direction of the resin film, The L / r ratio when the average length of the cavity in the thickness direction is r ( ⁇ m) and the average length of the cavity in the orientation direction of the cavity is L ( ⁇ m) is 10 or more, and The heat retainer is characterized in that the resin film has a thickness of 1.0 mm or less.
  • the space between the heat source and the sheet is set to 1.0 mm or more and 50 mm or less, so that the heat retention device can be reduced in size and the space between the heat source and the sheet can be reduced.
  • Certain air makes it difficult for heat from the heat source to be transmitted to the outside of the heat retainer.
  • the resin film has independent cavities, is oriented perpendicular to the thickness direction of the resin film, and has a specific range of aspect ratios. Therefore, the heat from the heat source is more difficult to be transmitted to the outside of the heat retainer, and the heat source is insulated to efficiently retain heat.
  • the resin film can be freely deformed due to the flexibility of the resin film.
  • the heat retainer enables effective use of heat and further increases the degree of freedom in design.
  • the sheet has a heat conductive layer on a surface on a heat source side of the resin film, and the thickness of the heat conductive layer is 1.0 mm or less.
  • the heat conductive layer is disposed on a surface on the heat source side of the resin film, so that the heat from the heat source is transferred to the resin film before being transferred to the resin film. Since the heat is transmitted in the surface direction of the conductive layer, the heat from the heat source spreads uniformly on the sheet. As a result, there is no uneven heat retention of the heat source, and uniform heat retention is possible.
  • ⁇ 3> The heat retainer according to any one of ⁇ 1> to ⁇ 2>, wherein the resin film includes a deformation preventing material on a surface opposite to a surface on the heat source side.
  • the deformation preventing material is disposed on a surface opposite to the heat source side surface of the resin film, so that the heat retention is not affected. Deformation such as warpage is suppressed, and the heat insulator can withstand long-term use.
  • ⁇ 4> The heat retainer according to ⁇ 3>, wherein the plurality of deformation preventing materials are arranged in a direction orthogonal to a direction parallel to a direction in which the sheet having a planar shape is deformed.
  • ⁇ 5> The heat retainer according to any one of ⁇ 1> to ⁇ 4>, wherein the resin film is made of only a crystalline polymer.
  • ⁇ 6> The heat retainer according to any one of ⁇ 1> to ⁇ 5>, wherein the resin film has a thermal conductivity of 0.08 W / mK or less.
  • ⁇ 7> The heat retainer according to any one of ⁇ 1> to ⁇ 6>, wherein the ratio of independent cavities is 80% by volume or more with respect to all the cavities.
  • ⁇ 8> The heat retainer according to any one of ⁇ 2> to ⁇ 7>, wherein the heat conductivity of the heat conductive layer is 1.0 W / mK or more.
  • ⁇ 9> The heat retainer according to any one of ⁇ 1> to ⁇ 8>, wherein the heat source is a hot water storage container.
  • An electric water heater having the heat retainer according to ⁇ 9>.
  • the conventional problems described above can be solved, heat can be used effectively, and a heat retainer with a high degree of design freedom can be provided.
  • FIG. 2A is a perspective view of a resin film for explaining an aspect ratio and having an independent cavity.
  • FIG. 2B is a diagram for explaining the aspect ratio, and is a cross-sectional view taken along the line A-A ′ of the resin film having independent cavities in FIG. 2A.
  • FIG. 2C is a view for explaining the aspect ratio, and is a B-B ′ sectional view of the resin film having independent cavities in FIG. 2A.
  • FIG. 3 is a perspective view in which deformation preventing materials are arranged in a resin film having a cylindrical independent cavity.
  • FIG. 4 is a cross-sectional photograph of the resin film 7 produced in Example 14 (cross-sectional photograph corresponding to the A-A ′ section of FIG. 2A).
  • FIG. 5 is a cross-sectional photograph of the resin film 10 produced in Comparative Example 4.
  • the heat retainer of the present invention has at least a heat source and a sheet, and further has other configurations as necessary.
  • the heat source is not particularly limited as long as it is a member that is at least one of higher and lower temperatures than normal temperature, and can be appropriately selected according to the purpose.
  • a hot water storage container for an electric water heater a refrigerator warmer room And refrigerator rooms and water bottles.
  • the sheet has at least a resin film having an independent cavity, and further has other configurations as necessary.
  • the said cavity which the resin film which has the said independent cavity has means the domain of a vacuum state, or a gaseous phase which exists in the said resin film inside.
  • the independent cavities refer to a state in which two or more cavities are not connected in a state where resin exists around the cavities. The independent cavity can be confirmed by image analysis of a photograph taken with an optical microscope or a scanning electron microscope.
  • the ratio of the independent cavities is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 80% by volume or more, more preferably 90% by volume or more, and 95% by volume with respect to all the cavities. The above is particularly preferable. When the ratio of the independent cavities is within the particularly preferable range, it is advantageous in terms of heat retention.
  • the ratio of the independent cavities can be obtained by image analysis of a photograph taken with an optical microscope or a scanning electron microscope.
  • the cavity is oriented perpendicular to the thickness direction of the resin film having the independent cavity.
  • the cavity has an aspect ratio in a specific range.
  • the resin film having independent cavities has independent cavities, and the cavities have a specific orientation and an aspect ratio in a specific range, whereby high heat retention can be obtained. Therefore, the heat retainer of the present invention can effectively use heat.
  • the aspect ratio is an L / r ratio when the average length of the cavities in the thickness direction is r ( ⁇ m) and the average length of the cavities in the orientation direction of the cavities is L ( ⁇ m). , And may be abbreviated as “aspect ratio”).
  • the aspect ratio is not particularly limited as long as it is 10 or more, and can be appropriately selected according to the purpose, but is preferably 15 or more, and more preferably 20 or more. When the aspect ratio is 20 or more, it is advantageous in that heat retention and cushioning properties of the seat can be improved.
  • FIG. 2A to 2C are diagrams for specifically explaining the aspect ratio, in which FIG. 2A is a perspective view of a resin film having an independent cavity, and FIG. 2B is an illustration of the independent cavity in FIG. 2A.
  • FIG. 2C is a cross-sectional view taken along the line BB ′ of the resin film having an independent cavity in FIG. 2A.
  • the “average length of the cavities in the thickness direction (r ( ⁇ m))” is a cross section perpendicular to the surface 1a of the resin film 1 having independent cavities and perpendicular to the first stretching direction (FIG. 2A). This corresponds to the average thickness r (see FIG. 2B) of the cavity 100 in the AA ′ cross section in FIG.
  • the “average length (L ( ⁇ m)) of the cavities in the orientation direction of the cavities” is a cross section perpendicular to the surface 1a of the resin film 1 having independent cavities and parallel to the first stretching direction. This corresponds to the average length L (see FIG. 2C) of the cavity 100 in the (BB ′ cross section in FIG. 2A).
  • stretching direction shows the extending direction of 1 axis
  • this longitudinal stretching direction corresponds to the first stretching direction.
  • stretching is biaxial or more, at least 1 direction is shown among the extending directions aiming at cavity formation.
  • longitudinal stretching is performed along the flow direction of the molded body during production, and a cavity can be formed by this longitudinal stretching. It corresponds to the first stretching direction.
  • the average length (r ( ⁇ m)) of the cavity in the thickness direction can be measured by an image of an optical microscope or an electron microscope.
  • the average length (L ( ⁇ m)) of the cavities in the alignment direction of the cavities can be measured by an image of an optical microscope or an electron microscope.
  • the average number P of the cavities in the thickness direction is not particularly limited and may be appropriately selected according to the purpose, but is preferably 5 or more, more preferably 10 or more, and even more preferably 15 or more. .
  • the cavities are usually oriented along the first stretching direction. Therefore, the “number of the cavities in the thickness direction orthogonal to the orientation direction of the cavities” is a cross section perpendicular to the surface 1a of the resin film 1 having independent cavities and perpendicular to the first stretching direction (FIG. 2A). Corresponds to the number of cavities 100 included in the film thickness direction.
  • the average number P of the cavities in the thickness direction can be measured by an image of an optical microscope or an electron microscope.
  • the heat conductivity of the resin film which has the said independent cavity there is no restriction
  • the thermal conductivity can be calculated by the product of measured values of thermal diffusivity, specific heat, and density.
  • the thermal diffusivity can be generally measured by a laser flash method (for example, TC-7000 (manufactured by Vacuum Riko Co., Ltd.)).
  • the specific heat can be measured by a differential scanning calorimeter (DSC) according to the method described in JIS K7123.
  • the density can be calculated by measuring the mass of a certain area and its thickness.
  • the thickness of the resin film having an independent cavity is not particularly limited as long as it is 1.0 mm or less, and can be appropriately selected according to the purpose, but is preferably 0.01 mm or more and 0.5 mm or less. 0.02 mm or more and 0.2 mm or less is more preferable, and 0.04 mm or more and 0.18 mm or less is particularly preferable.
  • the thickness of the resinous film exceeds 1.0 mm, the workability may be lowered, and particularly, it may be difficult to bend the independent cavity.
  • the thickness is within the particularly preferable range, it is advantageous in that it can be easily handled and can be bent sufficiently following a heat source having a small curvature radius.
  • the thickness refers to one thickness when the resin film having the independent cavity is used as a single sheet, and when a plurality of stacked films are used, a plurality of stacked layers are used. The total thickness of the sheets.
  • the material of the resin film having an independent cavity is not particularly limited and may be appropriately selected depending on the intended purpose.
  • the resin film may be composed of only a crystalline polymer or other components other than the crystalline polymer. May be included. Among these, what consists only of the said crystalline polymer is advantageous at the point which can improve heat retention.
  • Crystalline polymer-- In general, polymers are classified into crystalline polymers and amorphous (amorphous) polymers, but even crystalline polymers are not 100% crystalline, and long chain molecules are regularly formed in the molecular structure. It includes aligned crystalline regions and non-regularly arranged amorphous (amorphous) regions. Therefore, the crystalline polymer only needs to include at least the crystalline region in the molecular structure, and the crystalline region and the amorphous region may be mixed.
  • polyolefin for example, low density polyethylene, high density polyethylene, polypropylene, etc.
  • PA polyamides
  • POM polyacetals
  • polyesters eg, PET, PEN, PTT, PBT, PPT, PHT, PBN, PES, PBS, etc.
  • SPS syndiotactic polystyrene
  • PPS polyphenylene sulfide
  • PEEK polyether ether ketones
  • polyolefins polyolefins, polyesters, syndiotactic polystyrene (SPS), and liquid crystal polymers (LCP) are preferable, and polyolefins and polyesters are more preferable from the viewpoints of durability, mechanical strength, production, and cost. Two or more kinds of these polymers may be blended or copolymerized.
  • SPS syndiotactic polystyrene
  • LCP liquid crystal polymers
  • the melt viscosity of the crystalline polymer is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 50 Pa ⁇ s to 700 Pa ⁇ s, more preferably 70 Pa ⁇ s to 500 Pa ⁇ s, and more preferably 80 Pa ⁇ s. More preferably, s to 300 Pa ⁇ s.
  • the melt viscosity is 50 Pa ⁇ s to 700 Pa ⁇ s, the shape of the melt film discharged from the die head at the time of melt film formation is stable, and it is easy to form a uniform film. It is preferable in that it becomes appropriate and is easy to extrude, and the melted film at the time of film formation is leveled to reduce unevenness.
  • the melt viscosity can be measured by a plate type rheometer or a capillary rheometer.
  • the intrinsic viscosity (IV) of the crystalline polymer is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.4 to 1.2, more preferably 0.6 to 1.0. 0.7 to 0.9 is particularly preferable.
  • the IV is 0.4 to 1.2, the strength of the formed film is increased, and this is preferable because the film can be efficiently stretched.
  • the IV can be measured by an Ubbelohde viscometer.
  • the melting point (Tm) of the crystalline polymer is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 40 ° C to 350 ° C, more preferably 100 ° C to 300 ° C, and more preferably 100 ° C to 260 ° C. ° C is particularly preferred.
  • the melting point of 40 ° C. to 350 ° C. is preferable in that the shape can be easily maintained in a temperature range expected for normal use, and even without using a special technique required for processing at a high temperature. It is preferable at the point which can form a uniform film.
  • the melting point can be measured by a differential scanning calorimeter (DSC).
  • polyester resins mean a general term for polymer compounds having an ester bond as a main bond chain. Therefore, as the polyester resin suitable as the crystalline polymer, the exemplified PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PTT (polytrimethylene terephthalate), PBT (polybutylene terephthalate), PPT (polypenta).
  • the dicarboxylic acid component is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include aromatic dicarboxylic acids, aliphatic dicarboxylic acids, alicyclic dicarboxylic acids, oxycarboxylic acids, and polyfunctional acids. Can be mentioned.
  • aromatic dicarboxylic acid examples include terephthalic acid, isophthalic acid, diphenyldicarboxylic acid, diphenylsulfone dicarboxylic acid, naphthalenedicarboxylic acid, diphenoxyethanedicarboxylic acid, and 5-sodium sulfoisophthalic acid.
  • terephthalic acid, isophthalic acid, diphenyldicarboxylic acid, and naphthalenedicarboxylic acid are preferable, and terephthalic acid, diphenyldicarboxylic acid, and naphthalenedicarboxylic acid are more preferable.
  • Examples of the aliphatic dicarboxylic acid include oxalic acid, succinic acid, eicoic acid, adipic acid, sebacic acid, dimer acid, dodecanedioic acid, maleic acid, and fumaric acid.
  • Examples of the alicyclic dicarboxylic acid include cyclohexane dicarboxylic acid.
  • Examples of the oxycarboxylic acid include p-oxybenzoic acid.
  • Examples of the polyfunctional acid include trimellitic acid and pyromellitic acid.
  • succinic acid, adipic acid, and cyclohexanedicarboxylic acid are preferable, and succinic acid and adipic acid are more preferable.
  • the diol component is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include aliphatic diols, alicyclic diols, aromatic diols, diethylene glycol, and polyalkylene glycols. Of these, aliphatic diols are preferred.
  • Examples of the aliphatic diol include ethylene glycol, propane diol, butane diol, pentane diol, hexane diol, neopentyl glycol, and triethylene glycol. Among these, propanediol, butanediol, pentanediol, and hexanediol are particularly preferable.
  • Examples of the alicyclic diol include cyclohexanedimethanol.
  • Examples of the aromatic diol include bisphenol A and bisphenol S.
  • the melt viscosity of the polyester resin is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 50 Pa ⁇ s to 700 Pa ⁇ s, more preferably 70 Pa ⁇ s to 500 Pa ⁇ s, and more preferably 80 Pa ⁇ s. ⁇ 300 Pa ⁇ s is particularly preferred.
  • the higher the melt viscosity the easier it is to create cavities during stretching.
  • the melt viscosity is 50 Pa ⁇ s to 700 Pa ⁇ s, it is easier to extrude during film formation and the resin flow stabilizes and stays.
  • the intrinsic viscosity (IV) of the polyester resin is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.4 to 1.2, more preferably 0.6 to 1.0, 0.7 to 0.9 is particularly preferable.
  • IV is larger, cavities are more likely to be generated during stretching.
  • the IV is 0.4 to 1.2, extrusion is easy during film formation, and the resin flow is stable and stagnation does not easily occur. It is preferable in that the quality is stabilized.
  • the IV is 0.4 to 1.2, the stretching tension is appropriately maintained at the time of stretching, and thus it is easy to stretch uniformly and it is preferable in that the load is not easily applied to the apparatus.
  • the IV is 0.4 to 1.2, it is preferable in that the product is hardly damaged and the physical properties are increased.
  • the melting point of the polyester resin is not particularly limited and may be appropriately selected depending on the intended purpose. However, from the viewpoint of heat resistance and film forming property, 70 ° C. to 300 ° C. is preferable, and 90 ° C. to 270 ° C. More preferred.
  • the said dicarboxylic acid component and the said diol component may respectively superpose
  • a polymer may be formed by copolymerization.
  • two or more kinds of polymers may be blended and used.
  • the polymer added to the main polymer has a melt viscosity and an intrinsic viscosity that are close to those of the main polymer, and the addition amount is smaller when the film is formed or melted. It is preferable in that the physical properties are enhanced during extrusion and the extrusion becomes easy.
  • a resin other than polyester may be added to the polyester resin.
  • the resin film having independent cavities made of only a crystalline polymer can form cavities in a simple process even without adding a cavity forming agent such as inorganic fine particles or incompatible resins. Thereby, the recyclability of the resin film having the independent cavity can be enhanced. Furthermore, no special equipment for dissolving the inert gas in the resin in advance is required. In addition, it mentions later about the manufacturing method of the resin film which has the said independent cavity which consists only of crystalline polymers.
  • the resin film having independent cavities made of only the crystalline polymer may contain other components other than the crystalline polymer as necessary as long as it does not contribute to the expression of the cavities.
  • the other components include a heat resistance stabilizer, an antioxidant, an organic lubricant, a nucleating agent, a dye, a pigment, a dispersant, and a coupling agent. Whether or not the other component contributes to the development of the cavity can be determined by whether or not a component other than the crystalline polymer (for example, each component described later) is detected in the cavity or at the interface portion of the cavity.
  • Method for producing resin film having independent cavities made of only crystalline polymer-- The method for producing a resin film having independent cavities made of only the crystalline polymer is not particularly limited and may be appropriately selected depending on the intended purpose. However, at least stretching the polymer molded body by 2 to 8 times It is preferable to include a process. The method for producing a resin film having independent cavities may further include other steps such as a film forming step as necessary.
  • the said polymer molded object shows only what consists only of the said crystalline polymer, and does not have a cavity in particular, For example, a polymer film, a polymer sheet, etc. are mentioned.
  • the at least one crystalline polymer constituting the polymer molded body is composed of a plurality of types of crystal states and includes a crystal containing crystals that are difficult to stretch during stretching. It is considered that when the resin is peeled and stretched in such a manner that the resin is torn, this serves as a cavity forming source to form a cavity. Note that such void formation by stretching is possible not only when there is only one kind of crystalline polymer but also when two or more kinds of crystalline polymers are blended or copolymerized.
  • the stretching method is not particularly limited as long as the effects of the present invention are not impaired, and examples thereof include uniaxial stretching, sequential biaxial stretching, and simultaneous biaxial stretching. It is preferable that longitudinal stretching is performed along the direction in which the molded body flows.
  • the number of longitudinal stretching stages and the stretching speed can be adjusted by the combination of rolls and the speed difference between the rolls.
  • the number of stages of the longitudinal stretching is not particularly limited as long as it is one or more, but it can be stretched more than two stages in terms of more stable and high-speed stretching and production yield and machine restrictions. It is preferable to do.
  • longitudinal stretching in two or more stages is advantageous in that a cavity can be formed by stretching in the second stage after confirming the occurrence of necking in the first stage.
  • the stretching speed of the longitudinal stretching is not particularly limited as long as the effects of the present invention are not impaired, and can be appropriately selected according to the purpose, but is preferably 10 mm / min to 36,000 mm / min, and preferably 800 mm / min. Is more preferably 24,000 mm / min, and further preferably 1,200 mm / min to 12,000 mm / min.
  • the stretching speed is 10 mm / min or more, it is preferable in that sufficient necking can be easily expressed.
  • the stretching speed is 36,000 mm / min or less, uniform stretching is facilitated, the resin is not easily broken, and the cost is reduced without requiring a large stretching apparatus for high-speed stretching. It is preferable in that it can be performed.
  • the stretching speed is 10 mm / min to 36,000 mm / min, sufficient necking is easily exhibited, uniform stretching is facilitated, the resin is not easily broken, and high speed stretching is intended. This is preferable in that the cost can be reduced without requiring a large stretching apparatus.
  • the stretching speed in the case of one-stage stretching is preferably 1,000 mm / min to 36,000 mm / min, more preferably 1,100 mm / min to 24,000 mm / min, and 1,200 mm / min. More preferably, it is from min to 12,000 mm / min.
  • the first-stage stretching is a preliminary stretching whose main purpose is to develop necking.
  • the stretching speed of the preliminary stretching is preferably 10 mm / min to 300 mm / min, more preferably 40 mm / min to 220 mm / min, and still more preferably 70 mm / min to 150 mm / min.
  • the second-stage stretching speed after the necking is expressed by the preliminary stretching is preferably changed from the stretching speed of the preliminary stretching.
  • the second stage stretching speed after causing necking by the preliminary stretching is preferably 600 mm / min to 36,000 mm / min, more preferably 800 mm / min to 24,000 mm / min, and 1,200 mm. / Min to 15,000 mm / min is more preferable.
  • Stretching temperature The temperature during stretching is not particularly limited and can be appropriately selected according to the purpose.
  • T (° C) and the glass transition temperature is Tg (° C), (Tg-30) (° C.) ⁇ T (° C.) ⁇ (Tg + 70) (° C.)
  • Tg-25 the glass transition temperature
  • Tg + 70 the glass transition temperature
  • Tg ⁇ 20 the glass transition temperature
  • Tg + 70 the glass transition temperature
  • the stretching temperature (° C.) is ⁇ glass transition temperature (Tg) ⁇ 30 ⁇ ° C. or more, ⁇ glass transition temperature ( Tg) +70 ⁇ ° C. or lower is preferable in that the void content increases, the aspect ratio tends to be 10 or more, and the voids are sufficiently developed.
  • the stretching temperature T (° C.) can be measured with a non-contact thermometer.
  • the glass transition temperature Tg (° C.) can be measured by a differential scanning calorimeter (DSC).
  • lateral stretching may or may not be performed as long as it does not hinder the appearance of cavities.
  • the film may be relaxed or heat-treated using a lateral stretching process.
  • the molded body after stretching may be further subjected to treatment such as heat shrinkage by applying heat or application of tension for the purpose of shape stabilization.
  • the method for producing the polymer molded body is not particularly limited and may be appropriately selected depending on the purpose.
  • the crystalline polymer is a polyolefin, a polyester resin, a polyamide, or the like
  • a melt film is formed. It can manufacture suitably with a method.
  • the polymer molded body may be produced independently of the stretching step or continuously.
  • Drawing 1 is a figure showing an example of the manufacturing method of the resin film which has an independent cavity, and is a flow figure of a biaxially stretched film manufacturing device.
  • an extruder 12 a twin screw extruder or a single screw extruder is used depending on the raw material shape and production scale.
  • the T-die 13 a soft plate shape (film or sheet shape).
  • the discharged film or sheet F is cooled and solidified by the casting roll 14 to form a film.
  • the formed film or sheet F (corresponding to “polymer molded body”) is sent to the longitudinal stretching machine 15.
  • seat F formed into a film is again heated within the longitudinal stretch machine 15, and is stretched
  • a cavity is formed in the film or sheet F along the stretching direction.
  • the film or sheet F in which the cavities are formed is gripped at both ends by the left and right clips 16a of the transverse stretching machine 16, and is stretched laterally while being sent to the winder side (not shown). It becomes the resin film 1 which has a cavity.
  • the method for producing the resin film having an independent cavity other than the method for producing the resin film having an independent cavity made of only the crystalline polymer is not particularly limited and can be appropriately selected depending on the purpose.
  • the sheet may have a resin film other than the resin film having the independent cavity (for example, a resin film having no cavity).
  • the resin film which has the said independent cavity may be used by 1 sheet, and may laminate
  • stacking the resin film which has the said several independent cavity you may use an adhesive agent, unless the effect of this invention is impaired.
  • the thickness of the sheet is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.01 mm or more and 1.0 mm or less, more preferably 0.02 mm or more and 0.5 mm or less, and 0.04 mm.
  • the thickness is particularly preferably 0.2 mm or less. If the thickness of the sheet exceeds 1.0 mm, workability may be deteriorated, particularly bending may be difficult. On the other hand, when the thickness of the sheet is within the particularly preferable range, it is advantageous in that it can be easily handled and can be bent sufficiently following a heat source having a small curvature radius.
  • the sheet may be used, for example, by rounding the sheet cut into a quadrangle and joining two opposite sides to form a cylinder.
  • the cylindrical sheet can be arranged so as to have a predetermined distance along the curved side surface of the cylindrical heat source when the heat source is cylindrical.
  • the thermal conductive layer is a layer formed from a material having thermal conductivity.
  • the thermal conductivity of the said heat conductive layer is no restriction
  • an amorphous silica 1.5W / mK
  • a diamond 2,000W
  • stainless steel (30 W / mK), iron (80 W / mK), graphite (150 W / mK), aluminum (236 W / mK), copper (400 W / mK or more), silver (420 W / mK or more), gold ( 320 W / mK).
  • These may be used individually by 1 type and may use 2 or more types together.
  • graphite, aluminum, and copper are preferable in terms of cost and workability.
  • the thickness of the heat conductive layer is not particularly limited and may be appropriately selected depending on the purpose.
  • the thickness is preferably 1.0 mm or less, more preferably 1 ⁇ 10 ⁇ 6 mm to 0.3 mm, and more preferably 1 ⁇ 10.
  • a range of ⁇ 5 mm to 0.1 mm is particularly preferable. If the thickness of the heat conductive layer exceeds 1.0 mm, processing may be difficult. On the other hand, when the thickness of the heat conductive layer is within the particularly preferable range, it is advantageous in terms of workability when a heat retainer is formed.
  • the formation position of the heat conductive layer is the surface on the heat source side in the resin film having the independent cavity, that is, the sheet is on the heat source side in the resin film having the independent cavity. Having the heat conductive layer on the surface is advantageous in terms of heat uniformity.
  • the method for forming the heat conductive layer on the surface of the resin film having the independent cavity is not particularly limited and may be appropriately selected depending on the purpose.
  • the surface of the resin film having the independent cavity The method of forming by vapor deposition using a vapor deposition apparatus, the method of sticking the film which has thermal conductivity on the surface of the resin film which has the said independent cavity, etc. are mentioned.
  • an adhesive may be used as necessary as long as the effects of the present invention are not impaired.
  • the distance between the heat source and the sheet is not particularly limited as long as it is 1.0 mm or more and 50 mm or less, and can be appropriately selected according to the purpose, but 1.0 mm or more and 20 mm or less is preferable, and 1.0 mm It is more preferably 10 mm or less and particularly preferably 1.0 mm or more and 2.5 mm or less.
  • the distance between the heat source and the sheet is less than 1.0 mm, the sheet may come into contact with the heat source due to the swell of the sheet or the like, and heat retention may be impaired, and when the distance exceeds 50 mm, the heat source and the sheet The flow of air existing in the space between the sheets becomes large, and heat may escape to impair heat retention.
  • the distance between the heat source and the sheet is within the particularly preferable range, the flow of air existing in the space between the heat source and the sheet is small, so that heat retention is not impaired.
  • the method for adjusting the distance between the heat source and the sheet is not particularly limited and may be appropriately selected depending on the purpose.
  • a metal wire (wire) or a resin between the heat source and the sheet And a method of sandwiching the spacer.
  • the number of the metal wires in the case where the metal wires are sandwiched between the heat source and the sheet is not particularly limited and may be appropriately selected according to the purpose, and may be one or two or more. Good.
  • the distance between the heat source and the sheet can be adjusted by arranging a plurality of metal wires serving as spacers at equal intervals on the outer periphery of the heat source.
  • transformation prevention material is mentioned, for example.
  • -Deformation prevention material is a member that prevents deformation of the sheet due to heat. If deformation of the sheet can be prevented, a decrease in heat retention of the sheet due to deformation of the sheet is suppressed, and as a result, effective use of heat by the heat retainer of the present invention becomes possible.
  • Specific examples of the deformation of the sheet include, for example, warpage and undulation of the sheet due to heat.
  • the formation position of the deformation preventing material is a surface opposite to the surface on the heat source side in the resin film having the independent cavity, from the heat source without affecting the heat retention. It is advantageous in that the undulation of the sheet due to the heat of can be suppressed.
  • the plurality of deformation preventing materials are arranged in a direction orthogonal to a direction parallel to a direction in which the sheet having a planar shape is deformed. This is advantageous in that deformation (for example, warpage) of the sheet due to heat from the heat source can be prevented without impairing flexibility.
  • An example of a configuration in which a plurality of the deformation preventing materials are arranged in a direction perpendicular to a direction parallel to a direction in which the resin film having an independent cavity that has a planar shape is deformed is described with reference to FIG. explain.
  • FIG. 3 is a perspective view of a resin film 31 having cylindrical independent cavities in which columnar deformation preventing materials 32 are arranged. In FIG.
  • the plurality of deformation preventing materials 32 are parallel to the bending direction of the resin film 31 having a cylindrical independent cavity (the direction in which the resin film having an independent cavity having a planar shape is deformed). Are arranged at an appropriate interval in a direction perpendicular to.
  • the method for forming the deformation preventing material on the surface of the resin film having the independent cavities is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a method of attaching. When pasting, an adhesive may be used as necessary as long as the effects of the present invention are not impaired.
  • the electric water heater of the present invention has at least the heat retainer of the present invention, and further includes other members as necessary.
  • a molded body (polymer film) was produced.
  • This polymer molded body (polymer film) was uniaxially stretched (longitudinal stretching). Specifically, in a heated atmosphere at 40 ° C., uniaxial stretching was performed at a speed of 100 mm / min, and after confirming that necking had occurred, uniaxial stretching was further performed in the same direction at a speed of 510 mm / min.
  • a resin film 1 having a thickness of 110 ⁇ m was produced.
  • This resin film 1 was a sheet 1.
  • the below-mentioned measurement and evaluation were performed.
  • the measurement results and evaluation results are shown in Table 1-1.
  • the outer casing of the electric water heater (trade name: VIP thermos NC-SU221, manufactured by Matsushita Electric Industrial Co., Ltd.) was removed, and only the hot water storage container and the heater were used.
  • a spacer 1 (a metal wire having a diameter of 1.0 mm) was wound around the hot water storage container.
  • the sheet 1 was wound around the hot water storage container around which the spacer 1 was wound so that the distance between the hot water storage container and the sheet 1 was uniformly 1.0 mm, and a heat insulator was manufactured. The following evaluation was performed on the heat insulator. The evaluation results are shown in Table 1-2.
  • ⁇ Measurement> ⁇ 1 Measurement of Thermal Conductivity
  • the thermal diffusivity was measured using TC-7000 (manufactured by Vacuum Riko Co., Ltd.). Both sides of the resin film were blackened by spraying and measured at room temperature. The density and specific heat were measured by the method described later, and the thermal conductivity was determined from the product of the three measured values. The density was determined by cutting out a certain area, measuring the mass with a balance, measuring the thickness with a film thickness meter, and dividing the mass by the volume. The specific heat was determined by the method described in JIS K7123. As a differential scanning calorimeter (DSC), Q1000 (manufactured by TA Instruments) was used.
  • DSC differential scanning calorimeter
  • Thickness Resin Film Thickness
  • Measurement was performed using a long range contact displacement meter AF030 (measurement unit) and AF350 (instruction unit) manufactured by Keyence Corporation.
  • AF030 measurement unit
  • AF350 instruction unit
  • -Thickness of the deposited layer A small piece of the sheet whose cross section was exposed was embedded with an embedding resin to prepare an ultrathin section, and then the thickness was measured with a transmission electron microscope (JEM2010 type, manufactured by JEOL Ltd.). Alternatively, the cross section of the sheet was exposed, and the thickness was measured with a scanning electron microscope (S-4700 type, manufactured by Hitachi High-Technologies).
  • ⁇ 4 Presence or absence of independent cavities
  • the photographs taken with an optical microscope or a scanning electron microscope were subjected to image analysis to confirm the presence or absence of independent cavities.
  • ⁇ 5 Percentage of independent cavities The photographs taken with an optical microscope or a scanning electron microscope were subjected to image analysis to determine the percentage of independent cavities.
  • ⁇ 6 Direction of Orientation
  • the direction of orientation is confirmed by a photograph taken with an optical microscope or a scanning electron microscope, exposing each cross section in a direction parallel to and perpendicular to the longitudinal stretching direction of the resin film. did.
  • the descriptions in Table 1-1 and Table 2-1 have the following meanings.
  • MD All the cavities are oriented in the longitudinal stretching direction (direction perpendicular to the thickness direction). Many MD directions: 60% or more and less than 100% of the cavities are oriented in the longitudinal stretching direction (direction perpendicular to the thickness direction).
  • MD / TD equivalent 50% of the cavities are oriented in the longitudinal stretching direction (direction perpendicular to the thickness direction), and 50% of the cavities are oriented in the transverse stretching direction (direction perpendicular to the thickness direction).
  • ⁇ 7 Measurement of Aspect Ratio
  • a cross section was examined using a scanning electron microscope at an appropriate magnification of 300 to 3,000 times, and a measurement frame was set for each cross-sectional photograph. This measurement frame was set so that 50 to 100 cavities were included in the measurement frame. Next, the number of cavities included in the measurement frame is measured, and the number of cavities included in the measurement frame having a cross section perpendicular to the longitudinal stretching direction (see FIG. 2B) is m and the cross section parallel to the longitudinal stretching direction.
  • ⁇ Evaluation> ⁇ 1 Flexibility
  • the flexibility of the produced sheet was evaluated according to the following evaluation criteria.
  • ⁇ The hot water storage container can be surrounded without making a crease, and the sheet can be returned to its original flat shape by removing it from the heat source.
  • ⁇ Partially creased, but the hot water storage container can be surrounded, and when the sheet is removed from the heat source, it can be restored to its original flat shape with the partially creased.
  • X It breaks and cannot surround the hot water storage container, and when the sheet is removed from the heat source, it cannot be returned to its original flat shape while being deformed.
  • ⁇ 3 Thermal Uniformity
  • the thermal uniformity was measured with a small thermal image camera (CPA-0150 manufactured by Chino) that is displayed in color as the temperature changes. Based on the measurement results, the evaluation was made according to the following evaluation criteria. ⁇ : Select any 30 points on the image and measure the temperature, and the temperature difference range is within 2 ° C from the average value ⁇ : Select any 30 points on the image and measure the temperature, and the temperature difference range is the average value To 2 ° C to less than 5 ° C ⁇ : Select 30 points on the image and measure the temperature, and the temperature difference range is 5 ° C or more from the average value
  • ⁇ 4 Deformation Prevention Effect
  • the produced heat insulator was kept at 90 ° C. for 48 hours, and then the swell of the sheet was visually confirmed. Evaluation was made according to the following evaluation criteria. ⁇ : No swell is visually observed. ⁇ : One or two places were in contact with the heat source due to swell. X: Three or more places were in contact with the heat source due to the swell.
  • Example 2 The resin film 1 obtained in Example 1 was stretched in the transverse direction with a tenter. Specifically, in a warming atmosphere of 50 ° C., the film is stretched twice at 300 mm / min, heat-set at 150 ° C., cooled and wound, and a resin film 2 having a thickness of 53 ⁇ m (with an independent cavity) Resin film 2) was produced. This resin film 2 was designated as a sheet 2. Next, in Example 1, a sheet 2 was used instead of the sheet 1, and a heat insulator was produced in the same manner as in Example 1. About the said resin film and the said heat insulator, the same measurement and evaluation as Example 1 were performed. The results are shown in Table 1-1 and Table 1-2.
  • Example 3 Using a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC Kiko Co., Ltd.), copper having a thickness of 100 nm was vapor-deposited on one side of the resin film 1 obtained in Example 1 to produce a sheet 3.
  • a heat retainer was produced in the same manner as in Example 1, except that the sheet 3 was used instead of the sheet 1 and the heat conductive layer was on the surface of the hot water storage container.
  • the same measurement and evaluation as Example 1 were performed. The results are shown in Table 1-1 and Table 1-2.
  • Example 4 Using a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC Kiko Co., Ltd.), copper having a thickness of 100 nm was vapor-deposited on one surface of the resin film 2 obtained in Example 2 to produce a sheet 4.
  • a heat retainer was produced in the same manner as in Example 1 except that the sheet 4 was used in place of the sheet 1 and the heat conductive layer was on the surface of the hot water storage container.
  • seat and the said heat retention device the same measurement and evaluation as Example 1 were performed. The results are shown in Table 1-1 and Table 1-2.
  • Example 5 The resin film 1 obtained in Example 1 was stacked on eight sheets using an adhesive (aerosol adhesive, spray glue 99, manufactured by 3M) to a thickness of 0.88 mm. Subsequently, using a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC Kiko Co., Ltd.), aluminum having a thickness of 50 nm was vapor-deposited on one surface of the stacked resin films, and a sheet 5 was produced. Next, in Example 1, except that the sheet 5 is used instead of the sheet 1 and the heat conductive layer of the sheet 5 is on the surface of the hot water storage container, the heat retainer is the same as in Example 1. Was made. About the said sheet
  • Example 6 In Example 4, aluminum having a thickness of 100 nm was evaporated instead of copper, and a sheet 6 was obtained. Next, in Example 1, a heat retainer was produced in the same manner as in Example 1 except that the sheet 6 was used instead of the sheet 1 and the heat conductive layer was on the surface of the hot water storage container. About the said sheet
  • PET polyethylene terephthalate 100% resin, polyester
  • a body polymer film
  • the polymer molded body was uniaxially stretched (longitudinal stretching). Specifically, uniaxial stretching was performed at a speed of 100 mm / min in a heated atmosphere at 70 ° C., and after confirming that necking had occurred, further uniaxial stretching was performed in the same direction at a speed of 510 mm / min.
  • a resin film 3 having a thickness of 100 ⁇ m (resin film 3 having an independent cavity) was produced.
  • This resin film 3 was used as a sheet 7.
  • a heat retainer was produced in the same manner as in Example 1 except that the sheet 7 was used instead of the sheet 1 in Example 1.
  • the results are shown in Table 1-1 and Table 1-2.
  • Example 8 The resin film 3 obtained in Example 7 was stretched in the transverse direction with a tenter. Specifically, the film is stretched 3.5 times at a rate of 300 mm / min in a heated atmosphere at 120 ° C., heat-set at 200 ° C., cooled and wound, and a resin film 4 having a thickness of 50 ⁇ m (with an independent cavity) Resin film 4) was produced. Next, two sheets of graphite film (trade name: HT1220AP, manufactured by Graphtec Co., Ltd.) having a thickness of 0.5 mm are bonded to one side of the resin film 4 with an adhesive (aerosol adhesive, spray glue 99, manufactured by 3M), and the sheet 8 Was made.
  • an adhesive aserosol adhesive, spray glue 99, manufactured by 3M
  • Example 1 a heat retainer is performed in the same manner as in Example 1 except that the sheet 8 is used instead of the sheet 1 and that the heat conductive layer of the sheet 8 is on the surface of the hot water storage container.
  • the same measurement and evaluation as Example 1 were performed. The results are shown in Table 1-1 and Table 1-2.
  • Example 9 The aluminum foil (trade name: Mitsubishi foil, manufactured by Mitsubishi Aluminum Co., Ltd.) having a thickness of 0.012 mm was bonded to one surface of the resin film 4 obtained in Example 8 with an adhesive (aerosol adhesive, spray paste 99, manufactured by 3M). Sheet 9 was produced. Next, in Example 1, the sheet retainer is used in place of the sheet 1, and the heat retainer is the same as in Example 1 except that the heat conductive layer of the sheet 9 comes to the surface on the hot water storage container side. Was made. About the said sheet
  • Example 10 Five sheets of the resin film 3 obtained in Example 7 were stacked with an adhesive (aerosol adhesive, spray glue 99, manufactured by 3M) to a thickness of 0.5 mm. Two sheets of graphite film (trade name: HT1220AP, manufactured by Graphtec Co., Ltd.) having a thickness of 0.5 mm were bonded to one side of the laminated resin film with an adhesive (aerosol adhesive, spray paste 99, manufactured by 3M) to prepare a sheet 10. . Next, in Example 1, except that the sheet 10 is used in place of the sheet 1 and the heat conductive layer of the sheet 10 is on the surface of the hot water storage container, the heat retainer is the same as in Example 1. Was made. About the said sheet
  • Polypropylene (PP) (polypropylene 100% resin, manufactured by Aldrich, weight average molecular weight 190,000, number average molecular weight 50,000, MFI: 35 g / 10 min (ASTM D1238, 230 ° C., 2.16 kg), Tm: 170 ° C. to 175 ° C. ) was extruded from a T-die using a melt extruder and solidified with a casting drum to produce a polymer molded body (polymer film) having a thickness of 410 ⁇ m. Subsequently, the polymer molded body (polymer film) was uniaxially stretched (longitudinal stretching).
  • Example 12 The resin film 5 obtained in Example 11 was stretched in the transverse direction with a tenter. Specifically, the film was stretched 5 times at 50 mm / min in a heated atmosphere of 40 ° C., heat-set at 100 ° C., cooled and wound up, and a resin film 6 having a thickness of 10 ⁇ m (resin film having an independent cavity) 6) was produced. Next, copper having a thickness of 100 nm was vapor-deposited on one surface of the resin film 6 using a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC KIKOH Co., Ltd.) to produce a sheet 12.
  • VPC-410 vapor deposition apparatus
  • Example 1 the sheet retainer was used instead of the sheet 1, and the heat retainer was the same as in Example 1 except that the heat conductive layer of the sheet 12 was on the surface of the hot water storage container.
  • seat, and the said heat insulator the same measurement and evaluation as Example 1 were performed. The results are shown in Table 1-1 and Table 1-2.
  • Example 13 5 sheets of the resin film 5 obtained in Example 11 and 5 sheets of the resin film 6 obtained in Example 12 were overlapped with an adhesive (aerosol adhesive, spray glue 99, manufactured by 3M) to have a thickness of 0.4 mm.
  • a resin film was prepared.
  • a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC Kiko Co., Ltd.), copper having a thickness of 100 nm was vapor-deposited on one surface of the laminated resin film, thereby producing a sheet 13.
  • the sheet retainer was used in the same manner as in Example 1 except that the sheet 13 was used instead of the sheet 1 and the heat conductive layer of the sheet 13 was on the surface of the hot water storage container. Was made. About the said sheet
  • TPX polymethylpentene
  • Example 1 After heat fixing at 220 ° C., the film was relaxed by 4% in the width direction. Then, it cooled and wound up and produced the resin film 7 (resin film 7 which has an independent cavity) with a thickness of 180 micrometers. Next, using a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC Kiko Co., Ltd.), copper having a thickness of 100 nm was vapor-deposited on one surface of the resin film 7 to produce a sheet 14. Next, in Example 1, except that the sheet 14 was used instead of the sheet 1 and the heat conductive layer of the sheet 14 was on the surface of the hot water storage container, the heat retainer was the same as in Example 1. Was made.
  • FIG. 4 shows a cross-sectional photograph of the produced resin film 7 (cross-sectional photograph corresponding to the AA ′ cross-section of FIG. 2A).
  • Example 15 4 sheets of graphite film (trade name: HT1220AP, manufactured by Graphtec Co., Ltd.) having a thickness of 0.5 mm are bonded to one side of the resin film 2 obtained in Example 2 with an adhesive (aerosol adhesive, spray glue 99, manufactured by 3M).
  • a sheet 15 was produced.
  • the sheet retainer is used in place of the sheet 1, and the heat retainer is the same as in Example 1 except that the heat conductive layer of the sheet 15 is on the surface of the hot water storage container.
  • the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • Example 16 In Example 1, a spacer 2 (MDX6 with a diameter of 3.0 mm: a strand manufactured by Mitsubishi Gas Chemical Co., Ltd .: a thread extruded from a mold diameter of 3.0 mm) is used instead of the spacer 1, and the hot water storage container and the sheet 1 are A heat insulator was produced in the same manner as in Example 1 except that the distance was uniformly set to 3.0 mm. About the said heat retention device, the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • Example 17 In Example 4, a heat retainer was manufactured in the same manner as in Example 4 except that the heat conductive layer of the sheet 4 was on the surface opposite to the surface on the hot water storage container side. About the said heat retention device, the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • Example 18 30 sheets of deformation preventing material 1 (20 cm long ⁇ 1 cm wide ⁇ 0.3 cm thick aluminum plate) were attached to the sheet 1 obtained in Example 1 at intervals of 0.5 cm.
  • the spacer 1 was wound around the hot water storage container of the electric water heater from which the housing of Example 1 was removed.
  • the sheet 1 on which the deformation preventing material 1 was adhered and the hot water storage container were wound so that the distance was uniformly 1.0 mm.
  • the deformation preventing material 1 is arranged in a direction orthogonal to the direction parallel to the bending direction of the sheet 1, and the deformation preventing material 1 is attached to the surface of the sheet 1 opposite to the surface on the heat source side. It was wrapped so that it was attached.
  • the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • Example 19 30 sheets of the deformation preventing material 1 were attached to the resin film surface of the sheet 4 obtained in Example 4 at intervals of 0.5 cm.
  • a heat retainer was performed in the same manner as in Example 18 except that the sheet 4 with the deformation preventing material 1 attached was used instead of the sheet 1 with the deformation preventing material 1 attached.
  • the results are shown in Table 2-1 and Table 2-2.
  • Example 20 30 sheets of the deformation preventing material 1 were attached to the resin film surface of the sheet 5 obtained in Example 5 at intervals of 0.5 cm.
  • a heat retainer was performed in the same manner as in Example 18 except that the sheet 5 with the deformation preventing material 1 attached was used instead of the sheet 1 with the deformation preventing material 1 attached.
  • the results are shown in Table 2-1 and Table 2-2.
  • Example 21 30 sheets of the deformation preventing material 1 were attached to the resin film surface of the sheet 9 obtained in Example 9 at intervals of 0.5 cm.
  • a heat retainer was performed in the same manner as in Example 18 except that the sheet 5 with the deformation preventing material 1 attached was used instead of the sheet 1 with the deformation preventing material 1 attached.
  • the results are shown in Table 2-1 and Table 2-2.
  • Example 22 30 sheets of the deformation preventing material 1 were attached to the resin film surface of the sheet 13 obtained in Example 13 at intervals of 0.5 cm.
  • a heat retainer was performed in the same manner as in Example 18 except that the sheet 13 with the deformation preventing material 1 attached was used instead of the sheet 1 with the deformation preventing material 1 attached.
  • the results are shown in Table 2-1 and Table 2-2.
  • Example 1 The spacer 1 was wound around the hot water storage container of the electric water heater from which the housing of Example 1 was removed. Subsequently, around the hot water storage container around which the spacer 1 is wound, an aluminum foil having a thickness of 0.012 mm (trade name: Mitsubishi foil, so that the distance between the hot water storage container and the sheet 1 is uniformly 1.0 mm) A heat insulator for comparison was manufactured. About the said heat retention device, the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • Example 1 a sheet 16 was used instead of the sheet 1, and the comparative example was the same as in Example 1 except that the heat conductive layer of the sheet 16 was on the surface of the hot water storage container.
  • a heat insulator was produced. About the said resin film, the said sheet
  • PET polyethylene terephthalate 100% resin, polyesters
  • IV intrinsic viscosity
  • Example 1 a sheet 17 was used in place of the sheet 1, and the comparative example was the same as in Example 1 except that the heat conductive layer of the sheet 17 was on the surface of the hot water storage container.
  • a heat insulator was produced. About the said resin film, the said sheet
  • Example 1 copper having a thickness of 100 nm was vapor-deposited on one surface of the resin film 10 using a vapor deposition apparatus (trade name: VPC-410, manufactured by ULVAC KIKOH Co., Ltd.) to produce a sheet 18.
  • a sheet 18 was used in place of the sheet 1, and the comparative example was the same as in Example 1 except that the heat conductive layer of the sheet 18 was on the surface of the hot water storage container.
  • a heat insulator was produced. About the said sheet
  • Example 5 (Comparative Example 5)
  • a spacer 3 0.5 mm diameter metal wire
  • the distance between the hot water storage container and the sheet 1 was uniformly 0.5 mm.
  • a heat insulator for comparison was produced.
  • the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • Example 6 (Comparative Example 6) In Example 1, eight spacers 4 (20 cm long ⁇ 6.0 cm wide ⁇ 0.3 cm thick aluminum plate) are used, and the eight spacers 4 are arranged radially around the hot water storage container. A comparative heat-retaining device was manufactured in the same manner as in Example 1 except that the distance between the hot water storage container and the sheet 1 was uniformly 60 mm using the width. About the said heat retention device, the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2-1 and Table 2-2.
  • the heat insulators of Examples 1 to 22, which are the heat retainers of the present invention have excellent flexibility in the sheets constituting the members, and the power consumption of the electric water heater when used in an electric water heater. It has been found that there is an effect of reducing. Since the reduction in power consumption indicates the prevention of heat dissipation from the heat source, it has been found that heat can be effectively utilized by the heat retainer of the present invention.
  • the heat retainer of the present invention enables effective use of heat and has a high degree of design freedom, and thus can be suitably used for, for example, an electric water heater.

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Abstract

La présente invention concerne un dispositif de retenue de la chaleur comprenant une source de chaleur et une plaque. La distance entre la source de chaleur et la plaque est comprise dans une plage allant de 1,0 mm à 50 mm. La plaque comprend au moins un film en résine comprenant des cavités indépendantes. Les cavités dans le film en résine sont orientées dans la direction perpendiculaire par rapport à la direction de l'épaisseur du film en résine. Les cavités présentent un rapport L/r supérieur ou égal à 10, r désignant une longueur moyenne (μm) des cavités dans le sens de l'épaisseur et L désignant une longueur moyenne (μm) des cavités dans le sens de l'orientation des cavités. L'épaisseur du film en résine est inférieure ou égale à 1,0 mm.
PCT/JP2011/054076 2010-03-09 2011-02-24 Dispositif de retenue de la chaleur et chauffe-eau électrique WO2011111535A1 (fr)

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JP2010052188A JP2011185374A (ja) 2010-03-09 2010-03-09 保熱器、及び電気湯沸かし器
JP2010-052188 2010-03-09

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CN102434969B (zh) * 2012-02-05 2014-11-19 宁波市科技园区绿牌软包装技术贸易有限公司 一种电热膜管快速热水器

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JPS5548990B2 (fr) * 1974-03-11 1980-12-09
JP2000161588A (ja) * 1998-11-20 2000-06-16 Matsushita Electric Ind Co Ltd 複合断熱材
JP2001287291A (ja) * 2000-04-10 2001-10-16 Dainippon Printing Co Ltd 断熱材および断熱部材
JP2004332929A (ja) * 2003-04-18 2004-11-25 Matsushita Electric Ind Co Ltd 真空断熱材及び真空断熱材を使用した機器
JP2007285496A (ja) * 2006-04-20 2007-11-01 Hitachi Appliances Inc 真空断熱材及びこれを用いた冷蔵庫並びに車両
JP2009191112A (ja) * 2008-02-12 2009-08-27 Fujifilm Corp 空洞含有樹脂成形体及びその製造方法、並びに、昇華転写記録材料用又は熱転写記録材料用の受像フィルム又はシート
JP2009190744A (ja) * 2008-02-12 2009-08-27 Fujifilm Corp 食品用包装材及びその製造方法
JP2009299893A (ja) * 2008-05-15 2009-12-24 Nichias Corp 断熱材、これを用いた断熱構造及びその製造方法

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JPS5548990B2 (fr) * 1974-03-11 1980-12-09
JP2000161588A (ja) * 1998-11-20 2000-06-16 Matsushita Electric Ind Co Ltd 複合断熱材
JP2001287291A (ja) * 2000-04-10 2001-10-16 Dainippon Printing Co Ltd 断熱材および断熱部材
JP2004332929A (ja) * 2003-04-18 2004-11-25 Matsushita Electric Ind Co Ltd 真空断熱材及び真空断熱材を使用した機器
JP2007285496A (ja) * 2006-04-20 2007-11-01 Hitachi Appliances Inc 真空断熱材及びこれを用いた冷蔵庫並びに車両
JP2009191112A (ja) * 2008-02-12 2009-08-27 Fujifilm Corp 空洞含有樹脂成形体及びその製造方法、並びに、昇華転写記録材料用又は熱転写記録材料用の受像フィルム又はシート
JP2009190744A (ja) * 2008-02-12 2009-08-27 Fujifilm Corp 食品用包装材及びその製造方法
JP2009299893A (ja) * 2008-05-15 2009-12-24 Nichias Corp 断熱材、これを用いた断熱構造及びその製造方法

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