WO2023190569A1 - Feuille d'isolation thermique - Google Patents

Feuille d'isolation thermique Download PDF

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Publication number
WO2023190569A1
WO2023190569A1 PCT/JP2023/012622 JP2023012622W WO2023190569A1 WO 2023190569 A1 WO2023190569 A1 WO 2023190569A1 JP 2023012622 W JP2023012622 W JP 2023012622W WO 2023190569 A1 WO2023190569 A1 WO 2023190569A1
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Prior art keywords
heat insulating
dust
layer
packaging
insulating sheet
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PCT/JP2023/012622
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English (en)
Japanese (ja)
Inventor
集 佐々木
丈裕 宇井
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日東電工株式会社
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Publication of WO2023190569A1 publication Critical patent/WO2023190569A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/10—Bandages or covers for the protection of the insulation, e.g. against the influence of the environment or against mechanical damage

Definitions

  • the present invention relates to a heat insulating sheet.
  • the heat insulating sheet includes, for example, an intermediate layer made of a highly dispersed ceramic material made of a metal oxide such as silicate airgel, and bearing layers made of ceramic paper, ceramic foil, etc., provided on both upper and lower surfaces of the intermediate layer.
  • an intermediate layer made of a highly dispersed ceramic material made of a metal oxide such as silicate airgel
  • bearing layers made of ceramic paper, ceramic foil, etc., provided on both upper and lower surfaces of the intermediate layer.
  • thermally insulating molded product in which a pressed support body containing a shrinkable plastic film is covered with a shrinkable plastic film (see, for example, Patent Document 1).
  • the intermediate layer is formed by molding metal oxide powder, and the surface of the intermediate layer is rough and a part of the surface tends to crumble, so-called powder falling off.
  • the support including the intermediate layer is covered with a plastic film to prevent the metal oxide from leaking out even if it is peeled off from the surface of the intermediate layer.
  • a vent hole is provided in the plastic film in order to prevent the plastic film from breaking or bursting, there is a possibility that the metal oxide powder constituting the intermediate layer may flow out from the vent hole due to powder falling off from the intermediate layer.
  • a heat insulating sheet with ventilation holes in the packaging material layer is used to cover materials that tend to generate dust due to external stress, such as heat insulating materials molded from metal oxide powder.
  • soot and dust are not preferable, such as in a clean environment with almost no dust, it is important that the metal oxide powder does not flow out from the packaging material layer.
  • An object of one aspect of the present invention is to provide a heat insulating sheet that can suppress powder from flowing out from the heat insulating sheet and prevent damage to the packaging material layer.
  • One aspect of the heat insulating sheet according to the present invention is a first dust-generating layer of one or more layers that generates dust when external force is applied; a packaging material layer formed of a packaging film and covering one or more of the first dust-generating layers; Equipped with The following formula (1) is satisfied.
  • A is the Young's modulus (MPa) of the packaging film
  • B is the breaking strength (MPa) of the packaging film
  • C is the elongation at break (%) of the packaging film
  • D is the compression
  • F is the area (m 2 ) of the heat insulating material including the first dust-generating layer
  • G is the nitrogen permeability of the packaging film (cm 3 /(m 2 ) ⁇ day ⁇ MPa))
  • H is the air permeability of the ventilation hole in the packaging material layer (cm 3 /(cm 2 ⁇ s))
  • I is the area of the ventilation hole (cm 2 )
  • J is The thickness of the insulation material (mm).
  • One embodiment of the heat insulating sheet according to the present invention can suppress powder from flowing out from the heat insulating sheet, and can also suppress damage to the packaging material layer.
  • FIG. 1 is a perspective view of a heat insulating sheet according to an embodiment of the present invention.
  • 2 is a sectional view taken along line II in FIG. 1.
  • FIG. FIG. 2 is a plan view of FIG. 1; It is a sectional view showing an example of other composition of a heat insulation sheet. It is a top view which shows an example of another structure of a heat insulation sheet.
  • 6 is a sectional view taken along line II-II in FIG. 5.
  • FIG. It is a sectional view showing an example of other composition of a heat insulation sheet. It is a sectional view showing an example of other composition of a heat insulation sheet. It is a top view which shows an example of another structure of a heat insulation sheet. It is a sectional view showing an example of other composition of a heat insulation sheet. It is a sectional view showing an example of other composition of a heat insulation sheet. It is a sectional view showing an example of other composition of a heat insulation sheet. It is a sectional view showing an example of
  • FIG. 1 is a perspective view of a heat insulating sheet according to this embodiment
  • FIG. 2 is a sectional view taken along line II in FIG. 1
  • FIG. 3 is a plan view of FIG.
  • a heat insulating sheet 1A according to the present embodiment includes a heat insulating material 10 and a packaging material layer 20 covering the heat insulating material 10.
  • the heat insulating sheet 1A is formed into a sheet shape, and as shown in FIG. 3, is formed into a substantially rectangular shape in plan view.
  • the thickness direction (vertical direction) of the heat insulating sheet 1A is defined as the Z-axis direction
  • the lateral direction (horizontal direction) perpendicular to the thickness direction is defined as the X-axis direction and the Y-axis direction.
  • the first dust generation layer 11 side in the Z-axis direction is the +Z-axis direction
  • the second dust generation layer 12 side is the -Z-axis direction.
  • the +Z-axis direction will be referred to as upper or upper
  • the -Z-axis direction will be referred to as lower or lower, but this does not represent a universal vertical relationship.
  • a flat rectangular parallelepiped-shaped component such as a heat insulating sheet or a heat insulating material
  • opposing large-area surfaces are respectively referred to as “principal surfaces”
  • surfaces surrounding the main surfaces are referred to as “peripheral surfaces”.
  • a packaging film coated with one or more layers of heat insulating material is sometimes referred to as a "laminated heat insulating film.”
  • the heat insulating sheet 1A is configured to satisfy the following formula (1).
  • A is the Young's modulus (MPa) of the packaging film
  • B is the breaking strength (MPa) of the packaging film
  • C is the elongation at break (%) of the packaging film
  • D is the compression is the tensile strength (MPa) that is sometimes applied to the packaging film
  • F is the area (m 2 ) of the insulation material
  • G is the nitrogen permeability of the packaging film (cm 3 / (m 2 ⁇ day ⁇ MPa)).
  • H is the air permeability of the ventilation holes in the packaging material layer (cm 3 /(cm 2 ⁇ s))
  • I is the area of the ventilation holes (cm 2 )
  • J is the thickness of the insulation material (mm).
  • the Young's modulus (tensile modulus) of the packaging film is determined by measuring in an environment of 25° C. and 50% RH based on a method based on JIS-K-7161.
  • the pulling speed of the packaging film can be set as appropriate depending on the type of material constituting the packaging film, the size of the packaging film, etc., and may be set to 5 mm/min, for example.
  • the breaking strength of the packaging film is determined by measuring in an environment of 25° C. and 50% RH based on a method compliant with JIS K 7127 or JIS C 2318-72.
  • the compression speed can be set as appropriate depending on the type of material constituting the packaging film, the size of the packaging film, etc., and may be set to 5 mm/min, for example.
  • the elongation at break of the packaging film is determined by measuring the tensile elongation of the packaging film at 25°C and 50% RH environment based on the method according to JIS K 7127 or JIS C 2318-72, and calculating the elongation at break according to the following formula (I). It is obtained by dividing the distance L between gauges at the time of break of the packaging film by the original distance L0 between gauges of the packaging film and expressing the value as a percentage.
  • the tensile elongation of the packaging film is determined by the following formula (II).
  • the tensile speed when measuring the tensile elongation can be set as appropriate depending on the type of material constituting the packaging film, the size of the packaging film, etc., and may be set to 5 mm/min, for example.
  • Elongation at break (%) L/L 0 ⁇ 100 (I)
  • Tensile elongation (%) (L-L 0 )/L 0 ⁇ 100 (II)
  • the pressure applied to the packaging film at 60% compression deformation (P (60% The compressive displacement ) is expressed by the following formula (III).
  • the tensile strength D applied to the packaging film during compression is calculated by multiplying the pressure applied to the packaging film (0.1519875 MPa) by the 1/2 power of the area F of the heat insulating material 10 (i.e., the area F of the packaging film 1
  • the unit of thickness E of packaging film ( ⁇ m) and the unit of area F of insulation material (m 2 ) are set by multiplying the value obtained by multiplying by the length of the sides) and dividing by the thickness E of packaging film by 10 6 . It is required by.
  • the area (m 2 ) of the heat insulating material 10 is determined by measuring the length of two sides of the main surface of the heat insulating material 10 using a measuring instrument such as a ruler, and calculating the area of the main surface of the heat insulating material 10. It will be done.
  • the nitrogen permeability of the packaging film can be measured using a differential pressure gas chromatography method according to JIS K 7126-1 "Plastic films and sheets - Gas permeability test method - Part 1: Differential pressure method".
  • the air permeability of the ventilation holes in the packaging material layer 20 can be measured in an environment of 25° C. and 50% RH using a Frazier type tester based on a method based on JIS L1096.
  • the packaging material layer 20 is determined by, for example, having a predetermined size (200 mm x 200 mm), sucking air to a pressure of 125 kPa, and measuring the air flow rate at that time.
  • the area (cm 2 ) of the vent can be determined by a general area calculation method depending on the shape of the vent.
  • the thickness of the heat insulating material 10 is determined by measuring the cross section of the heat insulating material 10.
  • the thickness of the heat insulating material 10 is the thickness measured at an arbitrary location in the cross section of the heat insulating material 10. If measurements are taken at several arbitrary locations on the cross section of the heat insulating material 10, the average value of the thickness at these measurement locations may be used.
  • the heat insulating sheet 1A satisfies the following formula (2).
  • F is the area (m 2 ) of the heat insulating material including the first dust-generating layer
  • G is the nitrogen permeability of the packaging film (cm 3 /(m 2 ⁇ day ⁇ MPa))
  • H is the air permeability of the ventilation holes in the packaging material layer (cm 3 /(cm 2 ⁇ s))
  • I is the area of the ventilation holes (cm 2 )
  • J is the thickness of the insulation material (mm).
  • the above formula (2) is the amount of gas that can be moved in volume per second (cm3 / sec) when the heat insulating sheet 1A having a heat insulating material in the packaging material layer is compressed, Material area F x packaging film nitrogen permeability G/(24 hours x 60 minutes x 60 seconds) + air permeability H of ventilation holes in packaging material layer x area of ventilation holes I)
  • equation (2) shows that even if the configuration of the heat insulating material 10, the packaging material layer 20, and the porous film 30 and the main surface of the heat insulating sheet 1A are compressed and deformed by 60% in less than half a minute, that is, less than 30 seconds, , is the threshold value at which powder outflow and packaging layer rupture do not occur.
  • the inventor of the present application has aimed at suppressing the powder from which part of the first dust-generating layer 11 is peeled off from flowing out to the outside from the heat insulating sheet 1A that includes the first dust-generating layer 11 and the packaging material layer 20 having ventilation holes.
  • the inventor of the present application has determined the strength and breathability of the heat insulating sheet 1A, the degree to which the powder generated by the falling of the first dust-generating layer 11 flows out to the outside, and the degree to which the packaging material layer 20 is damaged or bursts.
  • the heat insulating material 10 is a laminate including a first dust-generating layer 11 and a second dust-generating layer 12, and the first dust-generating layer 11 and the second dust-generating layer 12 are laminated in this order.
  • the first dust generation layer 11 is formed in a sheet shape, and is a layer that generates dust when an external force is applied from the outside.
  • the first dust-generating layer 11 has a function of suppressing the heat transmitted to the heat insulating material 10 from being transmitted in the thickness direction, that is, has a heat insulating property, and has an arbitrary softness as appropriate and has a cushioning property. good.
  • dust generation refers to powder generated by so-called powder falling, where a part of the surface of the first dust generation layer 11 collapses, or the first dust generation layer 11 inside the first dust generation layer 11. It refers to soot dust that is generated when the first dust generating layer 11 is deformed or damaged due to external stress being applied to the first dust generating layer 11 by the constituent particles.
  • the first dust generation layer 11 has a lower thermal conductivity than the second dust generation layer 12.
  • the thermal conductivity of the first dust-generating layer 11 is not particularly limited as long as it is lower than the thermal conductivity of the second dust-generating layer 12 at 80°C and 2 MPa, but the thermal conductivity of the first dust-generating layer 11 at 23°C is , 0.3 W/(m ⁇ K) or less. If the thermal conductivity of the first dust-generating layer 11 is equal to or less than the above upper limit value, it can exhibit heat insulation properties.
  • the lower limit of the thermal conductivity of the first dust-generating layer 11 is not limited, and may be, for example, 0.010 W/K ⁇ m or more.
  • the thermal conductivity of the first dust generation layer 11 at 80°C and 2 MPa is determined by "JIS A 1412-1:2016 Method for measuring thermal resistance and thermal conductivity of thermal insulation materials - Part 2: Heat flow meter method (HFM method) It can be measured by a method compliant with ⁇ .
  • the thermal resistance of the first dust-generating layer 11 is not particularly limited, but is preferably 0.025 (K ⁇ m 2 )/W or more. Note that the upper limit value of the thermal resistance of the first dust-generating layer 11 is not limited, and may be, for example, 0.1 (K ⁇ m 2 )/W or less.
  • the first dust-generating layer 11 is not particularly limited as long as it generates dust and has a desired heat insulating property, and a porous body having voids inside or a foamed porous body having voids inside may be used.
  • the first dust-generating layer 11 is preferably a porous body.
  • the porous body may be manufactured by either a dry method or a wet method.
  • the porous body can contain inorganic particles.
  • the porous body may be formed from a compression molded body made of a mixture of inorganic particles and a binder.
  • the inorganic particles may be any inorganic particles as long as they can reduce heat transfer due to radiation, and preferably have an absorption peak in the infrared region, for example. Note that the absorption peak in the infrared region can be measured with an infrared spectrophotometer.
  • the inorganic particles may function as a binder that binds the fibers together.
  • the porous body may be composed of a compression molded body of a mixture containing the inorganic particles and fibers.
  • the materials of the inorganic particles include silica, titanium oxide, silicon carbide, titanite (ilmenite, FeTiO), zirconium silicate, iron (III) oxide (wustite (FeO), magnetite (Fe 3 ) ). O 4 ), hematite (Fe 2 O 3 )), chromium dioxide, zirconium oxide, manganese dioxide, zirconia sol, titania sol, silica sol, alumina sol, bentonite, and kaolin.
  • One type of inorganic particles may be used alone, or multiple types of inorganic particles may be used.
  • examples of the silica include silica produced by a dry method and silica produced by a wet method.
  • silica produced by a dry method include fumed silica.
  • examples of silica produced by a wet method include colloidal silica, precipitated silica, and silica gel.
  • examples of colloidal silica include anionic colloidal silica and cationic colloidal silica.
  • Precipitated silica refers to silica with a mesopore structure in the form of a powder with an average primary particle diameter of around 10 ⁇ m, which is obtained by synthesizing solid silica from a weakly alkaline to neutral aqueous solution, filtering, washing with water, and drying. Further treatments such as pulverization, granulation, calcination, and classification may be added.
  • As the silica gel it is preferable to use silica airgel, silica xerogel, etc., which have extremely low density.
  • Silica airgel and silica xerogel are silica gels with a high void ratio to volume, generally 90% or more, and a porous structure of several tens of nanometers. Silica airgel and silica xerogel have low heat transfer due to conduction in solid parts, and the movement of air component molecules inside is hindered, so there is little conduction and convection due to gas, and they have low thermal conductivity.
  • the average primary particle diameter of dry silica and wet silica can be designed as appropriate, and is preferably, for example, 1 nm to 20 nm, more preferably 3 nm to 18 nm, and even more preferably 8 nm to 15 nm. If the average primary particle diameter is within the above preferred range, dry silica or wet silica can exhibit the function of suppressing heat transfer.
  • the average primary particle diameter is measured using an electron microscope such as a transmission electron microscope (TEM). Observe the hydrophilic fumed silica 11 using an electron microscope such as a TEM, and if the hydrophilic fumed silica 11 is a spherical particle, use its diameter, and if it is an elliptical particle, use its short axis and long axis. If the particle is an amorphous particle, the intermediate value between the short side and the long side is used to determine the primary particle diameter. Then, a particle size distribution of the hydrophilic fumed silica 11 is created, and an average value of the particle size is determined based on the particle size distribution. This average value may be taken as the average particle diameter of the hydrophilic fumed silica 11.
  • TEM transmission electron microscope
  • the average particle diameter of the inorganic particles can be appropriately selected depending on the type of inorganic particles, the size of the first dust-generating layer 11, etc., and is preferably 1 ⁇ m to 1000 ⁇ m, for example.
  • the average particle size refers to the volume average particle size based on the effective diameter, and refers to the particle size distribution of inorganic particles that can exist in a stable state.
  • the average particle diameter is, for example, the cumulative amount of particles on a volume basis, starting from the smallest particle, in a particle size distribution curve obtained by measuring the particle size distribution using a laser diffraction/scattering method or a dynamic light scattering method. This is the particle diameter (median diameter) when it accounts for 50%.
  • the shape of the inorganic particles is not particularly limited, and may be, for example, spherical, ellipsoidal, spindle-shaped, crushed, plate-shaped, columnar, etc.
  • binders include thermoplastic resins, thermosetting resins, and sugars. These may be used alone or in combination of two or more.
  • the content of the binder in the fibrous body is not particularly limited as long as it is within a range that can exhibit heat insulating properties, and may be set to any content as appropriate.
  • the porous body further contains fibers.
  • the porous body can be formed from a compression molded body made of a mixture of inorganic particles, fibers, and a binder.
  • the fibers contained in the porous body are not particularly limited as long as they can be applied to the first dust-generating layer 11, and at least one of inorganic fibers and organic fibers may be used, but it is preferable that inorganic fibers are included.
  • inorganic fibers include, but are not limited to, silica fibers, glass fibers, alumina fibers, silica-alumina fibers, silica-alumina-magnesia fibers, biosoluble inorganic fibers, glass fibers, zirconia fibers, and alkaline earth metal silicate.
  • examples include salt fibers, alkaline earth silicate (AES) wool, glass wool, rock wool, and basalt fibers. These may be used alone or in combination of two or more.
  • organic fibers include, but are not limited to, aramid fibers, polyester fibers, polyethylene fibers, polypropylene fibers, polyvinyl chloride fibers, fluorocarbon resin fibers, nylon fibers, rayon fibers, acrylic fibers, and polyolefin fibers. These may be used alone or in combination of two or more.
  • the average fiber length of the fibers is not particularly limited as long as it can exhibit heat insulating properties, and is preferably from 0.05 mm to 50 mm, for example.
  • the average fiber diameter of the fibers is not particularly limited as long as it can exhibit heat insulating properties, and is preferably 0.1 ⁇ m to 50 ⁇ m, for example.
  • the content of fibers in the porous body constituting the first dust-generating layer 11 is not particularly limited as long as it is within a range that can exhibit dust-generating and heat-insulating properties, and is, for example, 70% by mass to 99.5% by mass. is preferred. Note that when the fibers include inorganic fibers and organic fibers, the content of the fibers in the porous body is the sum of the contents of the inorganic fibers and the organic fibers.
  • foamed porous material examples include urethane foam, phenol foam, polyethylene terephthalate foam, polystyrene foam, and silicone foam.
  • the foamed porous body may contain inorganic particles like the porous body. Since the inorganic particles may include inorganic particles similar to those contained in the porous body, details of the inorganic particles will be omitted. The content of inorganic particles contained in the fibrous body may be arbitrarily set as appropriate.
  • the density of the first dust-generating layer 11 is not particularly limited, and may be, for example, 0.20 g/cm 3 to 0.45 g/cm 3 .
  • the porosity of the foamed porous material according to the Archimedes method is not particularly limited and can be set as appropriate, but from the viewpoint of ensuring the heat insulation properties of the first dust generation layer 11, it is preferably 30% to 90%, for example.
  • the shape of the first dust generation layer 11 can be arbitrarily selected depending on the use of the heat insulating sheet 1A, and is not particularly limited as long as it is a shape suitable for insulating the surface of the installation surface. It is preferable that In this case, the shape of the first dust generation layer 11 in plan view may be a rectangle (for example, a polygon such as a quadrangle) as shown in FIG. 3, or may be a circle, an ellipse, or another shape.
  • the thickness of the first dust-generating layer 11 can be set as appropriate, but is preferably 0.8 mm to 5.0 mm, for example. If the thickness of the first dust-generating layer 11 is within the above-mentioned preferable range, the heat insulating properties can be improved and the size of the heat insulating sheet 1A can be suppressed.
  • the second dust generation layer 12 is provided on the upper surface 11a of the first dust generation layer 11.
  • the second dust-generating layer 12 may have a single layer, or may have two or more laminated layers.
  • the second dust-generating layer 12 is formed in a sheet shape, and generates less dust than the first dust-generating layer 11 when an external force is applied from the outside.
  • less dust generation than the first dust generation layer 11 means that no dust is generated even if stress is applied from the outside, or that even if dust is generated, the amount of dust generation is smaller than that of the first dust generation layer 11, and This means that the dust generation property is lower than that of the dust generation layer 11.
  • the second dust-generating layer 12 may be formed to have any softness as appropriate depending on the hardness of the first dust-generating layer 11. That is, the second dust-generating layer 12 may be more compressively deformable than the first dust-generating layer 11, or may be more compressively deformable than the first dust-generating layer 11, depending on the hardness of the first dust-generating layer 11. It doesn't have to be difficult.
  • the thermal conductivity of the second dust-generating layer 12 at 80°C and 2 MPa may be higher than that of the first dust-generating layer 11 at 80°C and 2 MPa, for example, from 0.04 W/(m ⁇ K) to It is preferable that it is 0.4 W/(m ⁇ K).
  • the thermal conductivity of the second dust-generating layer 12 at 80° C. and 2 MPa is preferably 20% or more of the thermal conductivity of the first dust-generating layer 11 at 80° C. and 2 MPa. Note that the thermal conductivity of the second dust-generating layer 12 can be measured in the same manner as the thermal conductivity of the first dust-generating layer 11.
  • the material of the second dust-generating layer 12 is preferably compressible and deformable and exhibits cushioning performance, and the second dust-generating layer 12 is made of, for example, the same porous material as the first dust-generating layer 11, fibers, Molded bodies of rubber, thermoplastic resin, etc. can be used.
  • a fiber molded body is obtained by molding fibers.
  • the fibers include inorganic fibers such as glass wool and rock wool, cellulose fibers, felts made of polyester, polypropylene, and the like.
  • the compressive elastic modulus of the second dust-generating layer 12 is within the range of 0.3 MPa to 8.0 MPa, the mass of the fibers used to form the second dust-generating layer 12 is 140 kg/m 3 to 400 kg/m 3 It is preferable.
  • glass wool is preferably cured with a thermosetting resin in order to increase the compressive modulus.
  • the fiber diameter is 3 ⁇ m to 13 ⁇ m and the fiber length is 5 mm to 200 mm.
  • a rubber molded body is obtained by molding rubber.
  • the rubber include styrene butadiene rubber, butadiene rubber, chloroprene rubber, isoprene rubber, butyl rubber, ethylene propylene rubber, nitrile rubber, silicone rubber, fluorine rubber, acrylic rubber, urethane rubber, polysulfide rubber, and shrimp chlorohydrin rubber. Can be mentioned. These may be used alone or in combination of two or more.
  • the Asker C hardness of the rubber molded product is preferably 53 or less. If the Asker C hardness is higher than 53, the heat insulating layer may be destroyed during compression. In addition, Asker C hardness is measured based on the hardness measuring method described in JIS K7312:1996 using an indenter of Asker rubber hardness meter C type.
  • thermoplastic resin molded body (resin molded body) is obtained by molding a thermoplastic resin or a thermosetting resin.
  • thermoplastic resin examples include polyurethane, polyethylene, polystyrene, polypropylene, ethylene vinyl acetate copolymer, and the like. These may be used alone or in combination of two or more.
  • thermosetting resins examples include urethane resins, phenol resins, urea resins, melamine resins, unsaturated polyesters, epoxy resins, and silicone resins. These may be used alone or in combination of two or more.
  • foamed resins foamed resins (foamed plastics) can be used.
  • foamed resins include polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride resins (PVC), styrene resins such as polystyrene, polyurethane resins such as polyurethane resins, and resol type phenolic resins such as phenolic resin (PF).
  • melamine resins such as melamine resin (MF)
  • epoxy resins such as epoxy resins (EP) may be used.
  • the resin molded body is preferably a resin foam formed by foam molding in which independent or continuous cells are formed using the above thermoplastic resin. Since the resin foam has air bubbles inside and on the surface, it is easily compressed and deformed and can exhibit cushioning performance.
  • the cell structure constituting the resin foam In order to make the compressive modulus of the resin foam within the range of 0.3 MPa to 8.0 MPa, the cell structure constituting the resin foam must have a closed cell structure, and the material used to form the resin foam must have a crosslinked structure. It is preferable that the material alone has a compressive modulus of elasticity of 700 MPa to 72,000 MPa. In order to keep the compressive elastic modulus of the resin foam within the range of 0.3 MPa to 8.0 MPa, the reinforcing structure of the resin foam must disperse stress and be less likely to buckle than a square cross-sectional shape that tends to concentrate stress. A wavy shape is preferred.
  • the second dust-generating layer 12 has flame retardancy (for example, UL94 V-0 of the UL flame retardant standard), and is non-flammable. It is further preferable to have the following.
  • the thickness of the second dust-generating layer 12 is preferably 1.0 mm to 8.8 mm, more preferably 1.5 mm to 7.5 mm, and even more preferably 2.0 mm to 5.0 mm. . If the thickness of the second dust-generating layer 12 is 1.0 mm to 8.8 mm, even if stress is applied from the outside to the heat insulating sheet 1A, the stress applied from the outside can be sufficiently absorbed, and the second dust-generating layer 12 dust generation can be suppressed.
  • the shape of the second dust generating layer 12 can be arbitrarily selected according to the use of the heat insulating sheet 1A, and can be deformed in accordance with deformations such as expansion and contraction of the installation surface.
  • the shape is not particularly limited as long as it is suitable for the purpose, for example, a plate shape is preferable.
  • the shape of the second dust-generating layer 12 in plan view may be rectangular (for example, a polygon such as a quadrangle), circular, elliptical, or any other shape.
  • the packaging material layer 20 covers the surface of the heat insulating material 10 (i.e., the surfaces exposed to the outside of the first dust generation layer 11 and the second dust generation layer 12), The heat insulating material 10 is housed inside in a sealed state.
  • the packaging material layer 20 includes the first dust-generating layer 11 or the second dust-generating layer of one or more layers. Cover the dust layer 12.
  • the packaging material layer 20 may cover only the first dust-generating layer 11.
  • the packaging material layer 20 covers at least one of the first dust-generating layer 11 and the second dust-generating layer 12 in a non-adhered state.
  • the packaging material layer 20 can be formed by welding or bonding the peripheral edges of a pair of sheet-shaped packaging films 21A and 21B.
  • the packaging material layer 20 may be formed by folding back a single packaging film 21A or packaging film 21B and welding or bonding the periphery.
  • the packaging material layer 20 has a seal portion 22 in which a pair of packaging films 21A and 21B are overlapped so as to face each other and their outer peripheral edges are welded or adhered to each other, and the pair of packaging films 21A and 21B and the seal portion
  • the heat insulating material 10 can be housed in a space defined by 22 in a sealed state. From the viewpoint of ease of forming the seal portion 22, it is preferable to form the seal portion 22 so as to protrude to the outside of the packaging material layer 20.
  • the seal portion 22 may be formed integrally with the packaging films 21A and 21B and made of the same material as the packaging films 21A and 21B, or may be formed separately from the packaging films 21A and 21B and made of the same material as the packaging films 21A and 21B. It may be made of a different material. When the seal portion 22 is formed of a different material from the packaging films 21A and 21B, the seal portion 22 may be formed of a heat seal layer, which will be described later.
  • the seal portion 22 reduces the area of the heat insulating material 10. If this results in a decrease in thermal resistance, a shrink wrapping film may be used to minimize the seal portion 22.
  • the position of the vent is not particularly limited, it is preferably formed on the circumferential surface of the heat insulating material 10 from the viewpoint of breathability.
  • a vent hole may be provided in the main surface.
  • the margins of the packaging films 21A and 21B without heat insulation material before heat shrinking need to be 15 mm or more, so that the shrinkage rate in hot air at 110°C is equal to or higher than the following formula (3).
  • the packaging films 21A and 21B are made of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyimide (PI), flame-retardant polycarbonate (PC), or breathable porous polyethylene (PE) with a molecular weight of 1 million to 7 million. Alternatively, it may have a layer made of flame-retardant polyethylene (PE) or biaxially oriented nylon film (Ny) film.
  • the packaging films 21A and 21B may further have a heat seal layer made of heat seal resin on the surface to which the seal portion 22 is bonded.
  • the heat seal layer may be provided at least on the seal portions 22 of the packaging films 21A and 21B.
  • heat seal resin examples include polyethylene (PE) and polypropylene (PP).
  • packaging films 21A and 21B have only a layer made of PET film, or a laminate of a layer made of PET film and a layer made of heat seal resin.
  • the thickness of the packaging material layer 20 is not particularly limited, and may be set to any thickness as appropriate.
  • the packaging material layer 20 may have at least the peripheral edges of the packaging films 21A and 21B joined by any one of thermal welding, thermal welding, ultrasonic welding, ultrasonic welding, hot melt resin, adhesive, and adhesive tape. preferable.
  • the welding strength of the joint portion of the joined packaging material layers 20 is greater than the breaking strength of the packaging material layers 20.
  • the packaging material layer 20 has one or more ventilation holes 23.
  • the packaging material layer 20 preferably has ventilation holes 23 in the packaging film 21A.
  • the vent 23 is provided on the surface of the packaging film 21A that is in contact with the first dust-generating layer 11 and the second dust-generating layer 12. Although one vent hole 23 is provided in the packaging film 21A, two or more vent holes 23 may be provided.
  • the area of the ventilation hole 23 may be set to any size as appropriate, and for example, it is preferably 0.000079 cm 2 or more, and more preferably 0.0079 cm 2 or more.
  • the upper limit of the area of the vent hole 23 is not particularly limited, but from the viewpoint of cost, it is preferably 10 cm 2 or less.
  • the vent hole 23 is covered with a porous membrane 30.
  • the porous membrane 30 may be formed in a sheet shape, and may be formed in a rectangular, circular, etc. shape when viewed from above.
  • the air permeability of the porous membrane 30 is preferably 4 cm 3 /(cm 2 ⁇ s) or more, more preferably 7 cm 3 /(cm 2 ⁇ s) or more, and 21 cm 3 /(cm 2 ⁇ s). It is more preferable that it is above.
  • the upper limit of the air permeability of the porous membrane 30 is not particularly limited, but from the viewpoint of preventing powder outflow, it is preferably less than 500 cm 3 /(cm 2 ⁇ s).
  • porous membrane 30 As the porous membrane 30, a general porous membrane can be used.
  • the method for manufacturing the heat insulating sheet 1A is not particularly limited, and any commonly used method may be used.
  • the heat insulating material 10 is manufactured by laminating the second dust generation layer 12 on one main surface of the first dust generation layer 11.
  • the heat insulating material 10 is placed between the pair of packaging films 21A and 21B, and the pair of packaging films 21A and 21B are overlapped so as to face each other, and their outer peripheral edges are welded or adhered to form a sealed portion. 22 is formed.
  • the heat insulating material 10 can be housed in the space defined by the pair of packaging films 21A and 21B and the seal portion 22 in a sealed state.
  • a heat insulating sheet 1A in which the heat insulating material 10 is covered with the packaging material layer 20 is obtained.
  • the heat insulating sheet 1A includes the first dust-generating layer 11 and the packaging material layer 20, and satisfies the above formula (1).
  • the above formula (1) is used as an index of the strength of the heat insulating sheet 1A and the air permeability of the heat insulating sheet 1A. Since the heat insulating sheet 1A satisfies the above formula (1), the heat insulating sheet 1A can satisfy the strength and breathability, so even if stress is applied from the outside, powder will fall off from the first dust generation layer 11. This can prevent the packaging material layer 20 from being damaged or bursting. Therefore, the heat insulating sheet 1A can suppress the powder generated from the first dust layer 11 from flowing out from the heat insulating sheet 1A, and can also suppress damage to the packaging material layer 20.
  • the heat insulating sheet 1A can satisfy the above formula (2).
  • the above formula (2) is an index of the air permeability of the heat insulating sheet 1A, so if the heat insulating sheet 1A satisfies the above formula (2), even if stress is applied from the outside, the packaging material layer 20 will be more likely to be damaged or damaged. It can be made difficult to burst. Therefore, the heat insulating sheet 1A can more reliably suppress damage or rupture of the packaging material layer 20.
  • the heat insulating sheet 1A may include silica particles in the first dust generation layer 11. Silica particles can be used as inorganic particles when the first dust-generating layer 11 is made of a porous material.
  • the first dust generation layer 11 can have high porosity and low thermal conductivity by being made of a porous material containing silica particles. Therefore, the heat insulating sheet 1A can improve the heat insulating properties of the first dust-generating layer 11, and therefore can exhibit high heat insulating properties.
  • the heat insulating sheet 1A can further include inorganic fibers in the first dust-generating layer 11.
  • the first dust-generating layer 11 can further increase the porosity of the first dust-generating layer 11 and maintain low thermal conductivity. Therefore, the heat insulating sheet 1A can further improve the heat insulating properties of the first dust-generating layer 11, and therefore can stably exhibit even higher heat insulating properties.
  • the heat insulating sheet 1A can be arranged so that the packaging material layer 20 is not adhered to the first dust generating layer 11.
  • the heat insulating sheet 1A can easily wrap the first dust-generating layer 11 within the packaging material layer 20.
  • the heat insulating sheet 1A prevents the first dust-generating layer 11 from deforming following the deformation of the packaging material layer 20 even if the packaging material layer 20 is deformed by stress applied from the outside. It can be suppressed. Therefore, the heat insulating sheet 1A can suppress damage to the first dust-generating layer 11 and further suppress powder falling.
  • the heat insulating sheet 1A includes a second dust-generating layer 12, and the second dust-generating layer 12 can be covered with a packaging material layer 20. Even when the heat insulating sheet 1A includes the second dust-generating layer 12, by covering the second dust-generating layer 12 with the packaging material layer 20, a part of the surface of the second dust-generating layer 12 is peeled off and the second dust-generating layer 12 is removed. Even if powder falls from the second dust-generating layer 12, the powder in the second dust-generating layer 12 can be prevented from flowing out. Therefore, even if the heat insulating sheet 1A includes the first dust-generating layer 11 and the second dust-generating layer 12, it is possible to suppress the outflow of powder.
  • the second dust generation layer 12 may have a porous body. Thereby, the second dust generation layer 12 can have high porosity and low thermal conductivity. Therefore, the heat insulating sheet 1A can improve the heat insulating properties of the second dust-generating layer 12, and therefore can exhibit high heat insulating properties.
  • the second dust-generating layer 12 can be formed to include inorganic fibers and a binder.
  • the second dust-generating layer 12 can be formed of a compression molded body containing inorganic particles, inorganic fibers, and a binder, so that the porosity of the second dust-generating layer 12 can be more easily increased. Thermal conductivity can be maintained low. Therefore, the heat insulating sheet 1A can further improve the heat insulating properties of the second dust-generating layer 12, and therefore can stably exhibit even higher heat insulating properties.
  • the heat insulating sheet 1A can be formed by including foamed resin in the second dust-generating layer 12. Even in this case, the second dust-generating layer 12 can have higher porosity and lower thermal conductivity. Therefore, the heat insulating sheet 1A can easily improve the heat insulating properties of the second dust-generating layer 12, and therefore can reliably and stably exhibit even higher heat insulating properties.
  • the heat insulating sheet 1A can be arranged so that the packaging material layer 20 is not bonded to the second dust generating layer 12.
  • the heat insulating sheet 1A can easily wrap the second dust-generating layer 12 within the packaging material layer 20.
  • the heat insulating sheet 1A prevents the second dust-generating layer 12 from deforming following the deformation of the packaging material layer 20 even if the packaging material layer 20 is deformed due to stress applied from the outside. It can be suppressed. Therefore, the heat insulating sheet 1A can suppress damage to the second dust-generating layer 12 and further suppress powder falling, thereby suppressing outflow of powder from the second dust-generating layer 12.
  • the heat insulating sheet 1A can include ventilation holes 23 in the packaging material layer 20. This makes it difficult for a pressure difference to occur between the inside and outside of the packaging material layer 20, so that the packaging material layer 20 can be made difficult to expand. Therefore, the heat insulating sheet 1A can prevent the packaging material layer 20 from expanding and being damaged or bursting.
  • the heat insulating sheet 1A can be provided with ventilation holes 23 on the surface where the packaging material layer 20 contacts the second dust-generating layer 12. Since the dust-generating property of the second dust-generating layer 12 is lower than that of the first dust-generating layer 11, the heat insulating sheet 1A is It is possible to further suppress the outflow of powder to the outside, and to suppress damage or rupture due to expansion of the packaging material layer 20.
  • the area of the vents 23 can be 0.000079 cm 2 or more. Thereby, it is possible to more reliably prevent a pressure difference between the inside and outside of the packaging material layer 20 from occurring, so that the heat insulating sheet 1A can reliably prevent the packaging material layer 20 from expanding and being damaged or bursting. .
  • the heat insulating sheet 1A can cover the vents 23 with a porous film 30. Thereby, the heat insulating sheet 1A can suppress powder generated from the first dust-generating layer 11 or the second dust-generating layer 12 from flowing out from the vent 23.
  • the porous membrane 30 can have an air permeability of 4 cm 3 /(cm 2 ⁇ s) or more. Thereby, the heat insulating sheet 1A can further suppress the powder generated from the first dust layer 11 or the second dust layer 12 from flowing out from the vent 23.
  • the heat insulating sheet 1A suppresses the powder generated in the first dust generating layer 11 or the second dust generating layer 12 from flowing out from the heat insulating sheet 1A, and also suppresses damage to the packaging material layer 20. Therefore, it can be effectively used as a heat insulating sheet used in clean environments where dust and soot are not preferred.
  • the heat insulating sheet 1B includes a heat insulating material 10 made up of only the first dust generation layer 11, and only the first dust generation layer 11 covered with the packaging material layer 20. You can do it like this.
  • FIG. 5 and FIG. It may be provided in some parts.
  • the ventilation holes 23 of the packaging material layer 20 may be provided on the lower surface of the first dust generation layer 11.
  • the ventilation holes 23 of the packaging material layer 20 are provided on the surface of the packaging film 21A that is in contact with the first dust generation layer 11 and the second dust generation layer 12, for example, as shown in FIG.
  • the heat insulating sheet 1E has the sealing portions 22 of the packaging films 21A and 21B closer to the lower end surface of the side surfaces of the first dust generating layer 11, and the ventilation holes 23 are provided in the sealing portions 22 of the packaging films 21A and 21B of the sealing portions 22. It's okay.
  • the ventilation hole 23 may be provided approximately at the center of one side of the packaging material layer 20 in a plan view of the heat insulating sheet 1E.
  • one vent hole 23 is provided on one side of the packaging material layer 20, two or more vent holes 23 may be provided, or one or two or more vent holes may be provided on each of the four sides of the packaging material layer 20.
  • the seal portion 22 of the packaging material layer 20 is formed to protrude outward in the circumferential direction of the heat insulating material 10, but as shown in FIG. It may be made so that it does not stick out.
  • One vent hole 23 may be provided on each of the four sides of the packaging material layer 20, or two or more vent holes 23 may be provided on each of the four sides of the packaging material layer 20. Further, one or more vent holes 23 may be provided on each of two opposing sides among the four sides of the packaging material layer 20.
  • the packaging material layer 20 is formed by folding back a single packaging film 21A or packaging film 21B and welding or gluing the periphery. Good too. Even in this case, the seal portion 22 of the packaging material layer 20 may be formed so as not to protrude outward in the circumferential direction of the heat insulating material 10.
  • the ventilation hole 23 may be provided approximately at the center of one side of the packaging material layer 20. Although one vent hole 23 is provided on one side of the packaging material layer 20, two or more vent holes 23 may be provided, or one or two or more vent holes may be provided on each of the four sides of the packaging material layer 20.
  • first dust generation layer 1 a mixture was prepared by mixing the following ingredients. Specifically, 21 parts by mass of hydrophilic fumed silica particles ("AEROSIL (registered trademark) 380", manufactured by Nippon Aerosil Co., Ltd., average primary particle diameter: about 7 ⁇ m, BET specific surface area: 380 m 2 /g) and inorganic fibers.
  • AEROSIL registered trademark
  • BET specific surface area 380 m 2 /g
  • a mixed solvent containing 4 parts by mass of glass fiber (“CS 25K-871", manufactured by Nittobo Co., Ltd., average diameter: 13 ⁇ m, average fiber length: 25 mm), 83 parts by mass of acetic acid, and 17 parts by mass of water, was They were mixed so that the ratio was 50 to 90.
  • the obtained liquid mixture was evaluated by the method of measuring consistency described below.
  • the obtained liquid mixture was applied to a substrate to a thickness of 3.8 mm to form a coating film.
  • the coating film was compression molded using a heat press machine to form a sheet with a thickness of 2 mm and a density of 0.3 to 0.5 g/ cm3 , and then dried at 100°C for 10 minutes to form a hydrophilic fumed film.
  • a heat insulating material (insulating layer) which is a molded body made of a mixture containing silica and glass fiber was produced.
  • the thickness of the obtained heat insulating material (insulating layer) was 2.0 mm, and the density was 0.35 g/cm 3 .
  • the compressive stress in a 25% compressed state was 2.04 MPa.
  • the produced first dust generation layer 1 was cut into a predetermined size (40 mm x 40 mm).
  • the conical weight is a standard cone specified by Japanese Industrial Standards, with a total mass of 102.5 g, and the mass of the weight holder is (47.5 ⁇ 0.05) g. It was used.
  • the heat insulation layer 1 was cut to a specified thickness of 10 mm square as a test specimen, and the test specimen was compressed at a compression speed of 0.5 mm/min using a precision universal testing machine (Autograph AGS-5kNX, manufactured by Shimadzu Corporation). Compressive stress was measured when compressed by 25%.
  • first dust generation layer 2 As the first dust generation layer 2, a mixture was prepared by mixing the following ingredients. Specifically, 21 parts by mass of hydrophilic fumed silica particles ("AEROSIL (registered trademark) 380", manufactured by Nippon Aerosil Co., Ltd., average primary particle diameter: about 7 ⁇ m, BET specific surface area: 380 m 2 /g) and inorganic fibers. A mixed solvent containing 4 parts by mass of glass fiber ("CS 25K-871", manufactured by Nittobo Co., Ltd., average diameter: 13 ⁇ m, average fiber length: 25 mm), 83 parts by mass of acetic acid, and 17 parts by mass of water, was They were mixed so that the ratio was 50 to 90.
  • AEROSIL registered trademark
  • the obtained liquid mixture was evaluated by the above-mentioned method of measuring consistency.
  • the obtained liquid mixture was applied to a substrate to a thickness of 1.90 mm to form a coating film.
  • the coating film was compression molded using a heat press machine to form a sheet with a thickness of 1 mm and a density of 0.3 to 0.5 g/ cm3 , and then dried at 100°C for 10 minutes to form a hydrophilic fumed film.
  • a heat insulating material (insulating layer) which is a molded body made of a mixture containing silica and glass fiber was produced.
  • the thickness of the obtained heat insulating material (insulating layer) was 1.0 mm, and the density was 0.35 g/cm 3 .
  • the compressive stress of the first dust-generating layer 2 was measured by the method described above, the compressive stress in a 25% compressed state was 2.04 MPa.
  • the produced first dust generation layer 2 was cut into a predetermined size (40 mm x 40 mm).
  • Preparation of second dust generation layer 1 Glass wool (uncured wool (800 g/m 2 ), manufactured by Central Glass Fiber Co., Ltd.) was heated for 5 minutes using a heat press at 180°C to thermoset the resin in the glass wool, and compression molded to a thickness of 3 mm. Got a sheet. The obtained sheet was used as the second dust-generating layer 1.
  • Packaging film 1 (sealant PET, thickness: 13 ⁇ m) was produced by laminating a polyethylene (PE) layer (thickness: 1 ⁇ m) as a sealant layer on a PET layer (12 ⁇ m). The produced packaging film 1 was cut into a predetermined size (42 mm x 42 mm).
  • PE polyethylene
  • Packaging film 2 (thickness: 20 ⁇ m) was prepared by laminating a PE layer (thickness: 1 ⁇ m) as a sealant layer on a PET layer (19 ⁇ m). The produced packaging film 2 was cut into a predetermined size (42 mm x 42 mm).
  • a packaging film 3 (thickness: 26 ⁇ m) was prepared by laminating a PE layer (thickness: 1 ⁇ m) as a sealant layer on a PET layer (25 ⁇ m). The produced packaging film 3 was cut into a predetermined size (42 mm x 42 mm).
  • a packaging film 4 (thickness: 51 ⁇ m) was prepared by laminating a PE layer (thickness: 1 ⁇ m) as a sealant layer on a PET layer (50 ⁇ m). The produced packaging film 4 was cut into a predetermined size (42 mm x 42 mm).
  • a flame-retardant polycarbonate film (PHF 860MAB, thickness: 50 ⁇ m, manufactured by Sumitomo Bakelite Co., Ltd.) was used as the packaging film 5.
  • the produced packaging film 5 was cut into a predetermined size (42 mm x 42 mm).
  • a breathable porous film made of PE having an average molecular weight of 500,000 or more (Sunmap (registered trademark) LC, thickness: 100 ⁇ m, manufactured by Nitto Denko Corporation) was used as the packaging film 6 with a thickness of 100 ⁇ m.
  • the produced packaging film 6 was cut into a predetermined size (42 mm x 42 mm).
  • packaging film 7 A 50 ⁇ m thick flame-retardant polyethylene (PE) film (Nan-Nen Electrostatic, manufactured by Miki Kasei) was used as the packaging film 7. The produced packaging film 7 was cut into a predetermined size (42 mm x 42 mm).
  • PE polyethylene
  • a biaxially stretched nylon film (NKBB-15, manufactured by Unitika) with a thickness of 15 ⁇ m was used as the packaging film 8.
  • the produced packaging film 8 was cut into a predetermined size (42 mm x 42 mm).
  • a packaging film 9 (sealant PET, thickness: 80 ⁇ m, manufactured by Line Plastics) was prepared by laminating a PE layer (thickness: 30 ⁇ m) as a sealant layer on a PET layer (50 ⁇ m). The produced packaging film 9 was cut into a predetermined size (42 mm x 42 mm).
  • a flame-retardant PE film (Iniga, manufactured by Sanyo Kasei Co., Ltd.) having a thickness of 20 ⁇ m was prepared as the packaging film 10.
  • the produced packaging film 10 was cut into a predetermined size (42 mm x 42 mm).
  • the produced packaging film 10 was cut into a predetermined size (70 mm x 70 mm).
  • a PET film (Hishipet PX-40S, manufactured by Mitsubishi Chemical) with a thickness of 20 ⁇ m was produced as the packaging film 12.
  • the produced packaging film 10 was cut into a predetermined size (70 mm x 70 mm).
  • Example 1-1 In Comparative Example 1, a test specimen was prepared in the same manner as in Comparative Example 1, except that one vent hole with a diameter of 0.01 cm was provided in the center of the film located on the second dust-generating layer 1 side of the heat insulating material. .
  • Example 1-2 A test specimen was produced in the same manner as in Example 1-1, except that the diameter of the vent hole was changed from 0.01 cm to 0.1 cm.
  • Example 1-2 the ventilation hole was changed to be provided in the center of the packaging film 1 located on the first dust-generating layer 1 side from the packaging film 1 located on the second dust-generating layer 1 side of the heat insulating material. Then, as porous membrane 1, a 15 mm x 15 mm breathable porous film (Sunmap (registered trademark) LC, thickness: 0.4 mm, manufactured by Nitto Denko Corporation) was attached to the four sides with double-sided tape, and the ventilation holes were attached to the porous membrane. 1 and adjusted the ventilation of the vent. A test specimen was produced in the same manner as in Example 1-2 except for the above.
  • Unmap registered trademark
  • LC thickness: 0.4 mm
  • Example 1-4 and 1-5 In Example 1-3, a test specimen was produced in the same manner as in Example 1-3, except that the thickness of the porous membrane 1 was changed. The thickness of the porous membrane 1 was changed to 0.3 mm in Example 1-4, and changed to 0.1 mm in Practical Example 1-5.
  • Example 1-6 In Example 1-3, porous membrane 1 was changed to porous membrane 2 (Nitthrough (registered trademark) AP0401 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides. A test specimen was prepared in the same manner as in Example 1-3.
  • Example 1-7 In Example 1-3, the porous membrane 1 was changed to the porous membrane 3 (TEMISH (registered trademark) VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides.
  • TEMISH registered trademark
  • VPF310A2-S1 with adhesive manufactured by Nitto Denko Corporation
  • Example 2-1 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 2.
  • Example 2-2 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 2.
  • Example 2-3 In Example 2-2, porous membrane 1 was changed to porous membrane 2 (Nitthrough (registered trademark) AP0401 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides. A test specimen was prepared in the same manner as in Example 2-2.
  • Example 2-4 In Example 2-2, the porous membrane 1 was changed to the porous membrane 3 (TEMISH (registered trademark) VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides. A test specimen was prepared in the same manner as in Example 2-2.
  • TEMISH registered trademark
  • VPF310A2-S1 with adhesive manufactured by Nitto Denko Corporation
  • Example 3-1 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 3.
  • Example 3-2 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 3.
  • Example 3-3 In Example 3-2, the porous membrane 1 was changed to the porous membrane 2 (Nitthrough (registered trademark) AP0401 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides.
  • a test specimen was prepared in the same manner as Example 3-2.
  • Example 3-4 In Example 3-2, except that porous membrane 1 was changed to porous membrane 3 (TEMISH (registered trademark) VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation) and double-sided tape was not applied on the four sides.
  • TEMISH registered trademark
  • VPF310A2-S1 with adhesive manufactured by Nitto Denko Corporation
  • Example 4-1 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 4.
  • Example 4-2 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from packaging film 1 to packaging film 4.
  • Example 4-3 porous membrane 1 was changed to porous membrane 2 (Nitthrough (registered trademark) AP0401 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides.
  • a test specimen was prepared in the same manner as Example 4-2.
  • Example 4-4 In Example 4-2, the porous membrane 1 was changed to the porous membrane 3 (TEMISH (registered trademark) VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides.
  • TEMISH registered trademark
  • VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation
  • double-sided tape was not applied on the four sides.
  • a test specimen was prepared in the same manner as in Example 4-2.
  • Example 5 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 5.
  • Example 6 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from packaging film 1 to packaging film 5.
  • Example 7 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 6.
  • Example 8 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 7.
  • Example 9 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from packaging film 1 to packaging film 7.
  • Comparative example 2 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 8.
  • Example 10 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from packaging film 1 to packaging film 8.
  • Example 11 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 9.
  • Example 12 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from packaging film 1 to packaging film 9.
  • Example 13 A test specimen was produced in the same manner as in Comparative Example 1, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 10.
  • Example 14 A test specimen was produced in the same manner as in Example 1-5, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 10.
  • Comparative example 3 In Comparative Example 1, only the first dust-generating layer 1 was used as the heat insulating material, and the heat insulating material was sandwiched between two upper and lower packaging films 1 with the sealant layer of the packaging film 1 inside, and the outer circumference of 2 mm was heated with an impulse sealer. It was sealed and the sealant layer was melted at 150°C. As a result, a laminated heat insulating film in which a heat insulating material was covered with a packaging material layer 1 made of two packaging films 1 was produced as a test specimen.
  • Example 15 A test specimen was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 2.
  • Example 16 In Comparative Example 3, a test body was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 3.
  • Example 17 A test specimen was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 4.
  • Example 18 A test specimen was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 5.
  • Example 19 In Comparative Example 3, a test body was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 6.
  • Example 20 In Comparative Example 3, a test body was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 7.
  • Example 21 A test specimen was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 9.
  • Example 22 In Comparative Example 3, a test body was produced in the same manner as in Comparative Example 3, except that the packaging material layer was changed from Packaging Film 1 to Packaging Film 10.
  • Example 23-1 In Comparative Example 3, one vent hole with a diameter of 0.1 cm was provided at the center of the main surface of the packaging film 1 located above the heat insulating material, and a 15 mm x 15 mm breathable porous film (Sunmap ( (registered trademark) LC, thickness: 0.4 mm, manufactured by Nitto Denko Corporation) with double-sided tape, and the ventilation holes were covered with the porous membrane 1 to adjust the ventilation of the ventilation holes.
  • a test specimen was produced in the same manner as in Comparative Example 3 except for the above.
  • Example 23-1 a test specimen was produced in the same manner as in Example 23-1, except that the thickness of the porous membrane 1 was changed. The thickness of the porous membrane 1 was changed to 0.3 mm in Example 23-2, and to 0.1 mm in Example 23-3.
  • Example 23-4 In Example 23-1, porous membrane 1 was changed to porous membrane 2 (Nitthrough (registered trademark) AP0401 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides. A test specimen was prepared in the same manner as Example 23-1.
  • Example 23-1 the porous membrane 1 was changed to the porous membrane 3 (TEMISH (registered trademark) VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation), and double-sided tape was not applied on the four sides.
  • TEMISH registered trademark
  • VPF310A2-S1 with adhesive, manufactured by Nitto Denko Corporation
  • the heat insulating material is a laminate in which the second dust generating layer 1 is laminated on the first dust generating layer 1 of the heat insulating material.
  • a vent hole with a diameter of 0.1 cm was formed in the center of the main surface of the packaging film located on the second dust-generating layer 1 side.
  • test specimen was placed in a dryer (PHH-202M manufactured by ESPEC Co., Ltd.) at 110° C. with the air volume adjusted to maximum for 15 seconds to shrink the film.
  • a laminated heat insulating film in which a heat insulating material was covered with a packaging material layer 1 consisting of two packaging films 11 was prepared as a test piece.
  • a test specimen was manufactured under the same conditions as in Comparative Example 3 except for the manufacturing conditions.
  • Example 24-2 In Example 24-1, the test was carried out in the same manner as in Example 24-1, except that the heat insulating material was a laminate in which the second dust generating layer 1 was laminated on the first dust generating layer 2 of the heat insulating material. The body was created.
  • Example 25-1 a test specimen was produced in the same manner as in Example 24-1, except that packaging film 12 was used.
  • Example 25-2 a test specimen was produced in the same manner as in Example 24-2, except that packaging film 12 was used.
  • the thickness of the insulation material was measured using a digital thickness gauge.
  • the thickness of each of the above packaging films was measured using a digital thickness gauge.
  • breaking strength of packaging film The breaking strength of the packaging film was measured in a 25° C., 50% RH environment by a method based on JIS K 7127. The compression speed was 5 mm/min.
  • Young's modulus of packaging film Young's modulus (tensile modulus) was measured in an environment of 25° C. and 50% RH by a method according to JIS-K-7161. The test speed was 5 mm/min.
  • Nitrogen permeability of packaging film Nitrogen permeability was measured using a differential pressure gas chromatography method according to JIS K 7126-1 "Plastics - Films and sheets - Gas permeability test method - Part 1: Differential pressure method".
  • Air permeability of the vent Air permeability was measured in a 25° C., 50% RH environment using a Frazier type tester in accordance with JIS L1096. A test piece of a predetermined size (200 mm x 200 mm) was prepared, air was sucked to a pressure of 125 kPa, and the air flow rate at that time was measured.
  • Tensile strength applied to packaging material layer The tensile strength applied to the packaging material layer was calculated using the following formula (iv).
  • Tensile strength applied to the packaging material layer [MPa] (force applied to the cross section of the packaging material layer due to compressive deformation/(thickness of the packaging material layer/1000)/((area of insulation material x 1000 x 1000) 0.5 ) ⁇ ...(iv)
  • the strength rate of the laminated heat insulating film was calculated based on the following formula (3).
  • A is the Young's modulus (MPa) of the packaging film
  • B is the breaking strength (MPa) of the packaging film
  • C is the elongation at break (%) of the packaging film
  • D is the compression It is the tensile strength (MPa) that is sometimes applied to packaging films.
  • Ventent rate of laminated insulation film The ventilation rate of the laminated heat insulating film was calculated based on the following formula (4).
  • F is the area (m 2 ) of the heat insulating material including the first dust-generating layer
  • G is the nitrogen permeability of the packaging film (cm 3 /(m 2 ⁇ day ⁇ MPa))
  • H is the air permeability of the ventilation holes in the packaging material layer (cm 3 /(cm 2 ⁇ s))
  • I is the area of the ventilation holes (cm 2 )
  • J is the thickness of the insulation material (mm).
  • the amount of ventilation of the packaging material layer, the tensile strength applied to the packaging material layer, the air permeability required to compress 60 vol% in 1 minute, the force applied to the cross section of the packaging material layer due to compression deformation, and Tables 3 and 7 show the calculated values of the tensile strength applied to the packaging material layer.
  • Tables 4 and 8 show the values calculated by formula (1).
  • the laminated insulation films of each example satisfy the above formula (1) and have a strength rate value of 2.0 or more obtained from the above formula (3). It was confirmed that if there is, the powder will not flow out and the packaging material layer will not break even if the laminated heat insulating film is compressed by at least 60% in the thickness direction from the outside. Furthermore, if the above formula (2) is satisfied and the value of the ventilation rate in the above formula (4) is 2.0 or more, the packaging material layer has high air permeability, so the shape of the packaging material layer will hardly change. It was confirmed that it is possible to maintain
  • aspects of the embodiment of the present invention are, for example, as follows. ⁇ 1> One or more first dust-generating layers that generate dust when external force is applied; a packaging material layer formed of a packaging film and covering one or more of the first dust-generating layers; Equipped with A heat insulating sheet that satisfies the following formula (1).
  • A is the Young's modulus (MPa) of the packaging film
  • B is the breaking strength (MPa) of the packaging film
  • C is the elongation at break (%) of the packaging film
  • D is the compression
  • F is the area (m 2 ) of the heat insulating material including the first dust-generating layer
  • G is the nitrogen permeability of the packaging film (cm 3 /(m 2 ) ⁇ day ⁇ MPa))
  • H is the air permeability of the ventilation hole in the packaging material layer (cm 3 /(cm 2 ⁇ s))
  • I is the area of the ventilation hole (cm 2 )
  • J is The thickness of the insulation material (mm).
  • ⁇ 4> The heat insulating sheet according to ⁇ 3>, wherein the first dust-generating layer further contains inorganic fibers.
  • ⁇ 5> The heat insulating sheet according to any one of ⁇ 1> to ⁇ 4>, wherein the packaging material layer is not bonded to the first dust-generating layer.
  • ⁇ 6> having one or more second dust-generating layers that generate less dust than the first dust-generating layer when external force is applied;
  • ⁇ 7> The heat insulating sheet according to ⁇ 6>, wherein the second dust-generating layer includes a porous body having voids inside.
  • the second dust-generating layer contains a foamed resin.
  • the packaging material layer has one or more ventilation holes.
  • ⁇ 12> The heat insulating sheet according to any one of ⁇ 6> to ⁇ 10>, wherein the packaging material layer has one or more ventilation holes on a surface in contact with the second dust-generating layer.
  • ⁇ 13> The heat insulating sheet according to ⁇ 11> or ⁇ 12>, wherein the area of the ventilation hole is 0.000079 cm 2 or more.
  • ⁇ 14> The heat insulating sheet according to any one of ⁇ 11> to ⁇ 13>, wherein the vent is covered with a porous membrane sheet.
  • ⁇ 15> The heat insulating sheet according to ⁇ 14>, wherein the porous membrane sheet has an air permeability of 4 cm 3 /(cm 2 ⁇ s) or more.
  • Heat insulation sheet 10 Heat insulation material 11 First dust generation layer 12 Second dust generation layer 20 Packaging material layer 21A, 21B Packaging film 23 Vent hole 30 Porous membrane

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Insulating Bodies (AREA)

Abstract

La présente invention concerne une feuille d'isolation thermique comprenant une ou plusieurs premières couches de production de poussière destinées à produire de la poussière lors de l'application d'une force externe, et une couche de matériau d'emballage composée d'un film d'emballage et recouvrant la ou les premières couches de production de poussière, et la feuille d'isolation thermique satisfait à la formule (1). (Dans la formule, A est le module de Young (MPa) du film d'emballage, B est la résistance à la rupture (MPa) du film d'emballage, C est l'allongement à la rupture (%) du film d'emballage, D est la résistance à la traction (MPa) appliquée au film d'emballage au moment d'une compression, F est l'aire (m2) d'un matériau d'isolation thermique comprenant la première couche de production de poussière, G est la perméabilité à l'azote (cm3/(m2·jour·MPa)) du film d'emballage, H est la perméabilité à l'air (cm3/(cm2·s)) d'un évent de la couche de matériau d'emballage, I est l'aire (cm2) de l'évent, et J est l'épaisseur (mm) du matériau d'isolation thermique.)
PCT/JP2023/012622 2022-03-31 2023-03-28 Feuille d'isolation thermique WO2023190569A1 (fr)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09241618A (ja) * 1996-03-06 1997-09-16 Nitto Denko Corp 形状回復性が制御された発泡体構造物
JPH10512349A (ja) * 1995-01-09 1998-11-24 ミネソタ・マイニング・アンド・マニュファクチュアリング・カンパニー 絶縁ブランケット
JP2000336793A (ja) * 1999-06-02 2000-12-05 Paramount Glass Kogyo Kk 断熱材及びその製造方法
US20080057334A1 (en) * 2006-08-25 2008-03-06 Raytheon Company Encapsulated and vented particulate thermal insulation
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
WO2017221687A1 (fr) * 2016-06-21 2017-12-28 パナソニックＩｐマネジメント株式会社 Matériau d'isolation thermique et procédé pour sa fabrication
US20190292348A1 (en) * 2016-11-22 2019-09-26 Omya International Ag Surface-treated fillers for biaxially oriented polyester films
WO2021117336A1 (fr) * 2019-12-13 2021-06-17 日東電工株式会社 Couvercle de batterie

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10512349A (ja) * 1995-01-09 1998-11-24 ミネソタ・マイニング・アンド・マニュファクチュアリング・カンパニー 絶縁ブランケット
JPH09241618A (ja) * 1996-03-06 1997-09-16 Nitto Denko Corp 形状回復性が制御された発泡体構造物
JP2000336793A (ja) * 1999-06-02 2000-12-05 Paramount Glass Kogyo Kk 断熱材及びその製造方法
US20080057334A1 (en) * 2006-08-25 2008-03-06 Raytheon Company Encapsulated and vented particulate thermal insulation
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
WO2017221687A1 (fr) * 2016-06-21 2017-12-28 パナソニックＩｐマネジメント株式会社 Matériau d'isolation thermique et procédé pour sa fabrication
US20190292348A1 (en) * 2016-11-22 2019-09-26 Omya International Ag Surface-treated fillers for biaxially oriented polyester films
WO2021117336A1 (fr) * 2019-12-13 2021-06-17 日東電工株式会社 Couvercle de batterie

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