JP2006077792A - Vacuum insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum insulating material, which is superior to productivity and suitable for mass production, capable of fixing a core material on a laminated film when manufacturing the vacuum insulating material. <P>SOLUTION: The core material 7 is arranged on a designated position at a thermally-deposited layer side of the laminated film 8, and a thermally-deposited layer 9 and the core material 7 are firmly fixed on at least one surface of the core material 7. A position gap of the core material 7 is not generated so that the position of the core material 7 is fixed when manufacturing the vacuum insulating material 6. A desired vacuum insulating material can easily be obtained, and the productivity of the vacuum insulating material can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum heat insulating material excellent in manufacturability and applicability.

  In recent years, from the viewpoint of protecting the global environment, energy saving of household electrical appliances and various industrial equipment has become an important issue to be addressed urgently. One solution is to apply a high-performance heat insulating material for the purpose of preventing unnecessary heat in and out.

  As a high-performance heat insulating material, there is a vacuum heat insulating material in which a core material having a porous structure is covered with an aluminum foil laminate film and the inside is decompressed and sealed. The vacuum heat insulating material has a heat insulating performance of about 3 to 6 times that of glass wool or rigid urethane foam, which are general heat insulating materials (see, for example, Patent Document 1).

  Moreover, the vacuum heat insulating material which made it easy to apply includes a material composed of a plurality of core materials (see, for example, Patent Document 2).

FIG. 7 is a plan view showing a conventional vacuum heat insulating material described in Patent Document 2. As shown in FIG. As shown in FIG. 7, three rectangular core materials 1 are covered with a gas barrier laminate film 2 and the inside of the laminate film 2 is decompressed. Laminating films 2 are heat-welded between adjacent core materials 1 so that each of the three core materials 1 is positioned in an independent space, and are adjacent to each other. There is a vacuum heat insulating material 5 that can be bent with the heat welding portion 3 positioned between 1 as a folding line 4.
Japanese Patent Publication No. 2-54479 Japanese Patent Laid-Open No. 7-98090

  However, in the above conventional vacuum heat insulating material manufacturing method, the three sides of the two sheet-like laminate films are preliminarily heat-welded and formed into a bag shape having an opening on one side, and a plurality of them are formed therein. A plurality of cores are arranged, then the inside of the laminate film is evacuated to a predetermined pressure, the openings are sealed by thermal welding, and the portions located between the cores are thermally welded. Since the material is fixed on the laminate film only by its own weight, the core material moves from a predetermined position during evacuation, and it is difficult to obtain a desired vacuum heat insulating material.

  An object of the present invention is to provide a vacuum heat insulating material that is capable of fixing a core material on a laminate film at the time of manufacturing a vacuum heat insulating material, has excellent productivity, and is suitable for mass production.

  In order to solve the above-mentioned conventional problems, the vacuum heat insulating material of the present invention has a core material arranged at a predetermined position on the heat welding layer side of the laminate film, and the heat welding layer and the core material are arranged on at least one surface of the core material. It is fixed.

  Thereby, since the position of the core material is fixed even during the manufacture of the vacuum heat insulating material, the core material is not displaced.

  The vacuum heat insulating material of the present invention can fix the core material on the laminate film at the time of production, can easily obtain a desired vacuum heat insulating material, and can increase the productivity of the vacuum heat insulating material.

  The invention described in claim 1 is a vacuum heat insulating material comprising a gas barrier laminate film having a heat-welded layer and a core material, wherein the core material is sealed by the laminate film under reduced pressure. Since it is a vacuum heat insulating material in which the core material is disposed at a predetermined position on the heat welding layer side and the heat welding layer and the core material are fixed on at least one surface of the core material, The position of the material is fixed, and it is possible to easily manufacture the vacuum heat insulating material without any misalignment of the core material.

  The invention according to claim 2 is the vacuum heat insulating material according to claim 1, wherein a part of the surface of the core material is fixed to the heat welding layer of the laminate film, and the core material can be easily disassembled. And the laminate film can be separated, and the recyclability as a product can be enhanced.

  Invention of Claim 3 is comprised in the vacuum heat insulating material of Claim 1 or Claim 2 by the some core material, can be bend | folded between core materials, Applicability increases.

  The invention according to claim 4 is the vacuum heat insulating material according to claim 3, wherein the core materials having different shapes coexist, and a combination of various shapes of the core materials is possible. Therefore, it is possible to freely design a folding line, and to manufacture a vacuum heat insulating material with high applicability.

  The invention according to claim 5 is the vacuum heat insulating material according to claim 3 or claim 4 in which cores of different thicknesses coexist, and when the vacuum heat insulating material according to the present invention is applied, When the heat insulating effect required by the body part and the application space of the vacuum heat insulating material are different from those of the other parts, the core material corresponding to the corresponding part can have a different thickness from the other parts.

  For example, in a part where the object is to be applied, when a larger heat insulating effect is required than in other parts, the thickness of the core material corresponding to the part can be increased.

  Moreover, in the site | part with a to-be-applied body, when the application space of a vacuum heat insulating material is smaller than another site | part, the thickness of the core material corresponding to the site | part can be made small.

  The invention according to claim 6 is the vacuum heat insulating material according to any one of claims 3 to 5, wherein a core material composed of different materials coexists, and the vacuum heat insulating material according to the present invention. When the heat insulation effect required by the part of the object to be applied, the space for applying the vacuum heat insulating material, and the atmospheric temperature are different from other parts, the core material corresponding to the relevant part is different from the other parts. It is possible to use a core material made of a material.

  For example, in a part where the object is to be applied, when a larger heat insulating effect is required than in other parts, the core material corresponding to the part can be made of a material having excellent heat insulating performance.

  In addition, when the application space of the vacuum heat insulating material is smaller than other parts at a part where the object is to be applied, the core material corresponding to that part is made of a material having excellent heat insulation performance, Even if the thickness is reduced, it is easy to obtain a predetermined heat insulating effect.

  Furthermore, when the atmospheric temperature is different from other parts in a part where the object is to be applied, the core material corresponding to the part can be made of a material excellent in heat insulation performance and temporal reliability in the temperature range.

  The invention according to claim 7 is the vacuum heat insulating material according to any one of claims 3 to 6, wherein each of the plurality of core members is disposed in an independent space, Even when the degree of vacuum of some core materials decreases due to friction or the like, the degree of vacuum of other core materials does not decrease, and a significant decrease in heat insulation performance as a whole of the vacuum heat insulating material can be prevented.

  The invention according to claim 8 is the vacuum heat insulating material according to any one of claims 1 to 7, wherein the laminate film is heat-welded along the periphery of the core material. Since there is no portion that is not thermally welded in the portion that does not include the core material in between, the fin portion at the end of the vacuum heat insulating material can be shortened, and the area occupied by the core material on the surface of the vacuum heat insulating material becomes relatively large. It is possible to increase the ratio of the effective heat insulation area on the surface of the heat insulating material. Therefore, even in the vacuum heat insulating materials having various shapes, an effective heat insulating area can be effectively obtained, and a vacuum heat insulating material having a high heat insulating effect can be obtained.

  Furthermore, the vacuum heat insulating material has a substantially core shape, and a vacuum heat insulating material having an arbitrary shape can be easily formed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a plan view of a vacuum heat insulating material according to Embodiment 1 of the present invention, and FIG.

  As shown in FIG. 1, a vacuum heat insulating material 6 is formed by covering a plurality of core materials 7 having a thickness of 3 mm made of a powder compression molded body formed into a right isosceles triangle with a laminate film 8 having gas barrier properties. The inside of the film 8 is decompressed.

  Here, the material used for the core material 7 may be any material obtained by processing a porous body having a gas phase ratio of about 90% into a plate shape, and can be used industrially. A known material can be used depending on the intended use and required characteristics.

  Among these, as the powder, there are inorganic, organic, and mixtures thereof, and industrially, those mainly composed of dry silica, wet silica, pearlite and the like can be used.

  As the foam, open-cell bodies such as urethane foam, styrene foam, and phenol foam can be used.

  Moreover, as a fiber body, although there exist inorganic type, organic type, and these mixtures, an inorganic fiber is advantageous from a viewpoint of heat insulation performance. As the inorganic fiber, known materials such as glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool and the like can be used.

  Moreover, mixtures of these foams, powders, fiber bodies and the like can also be used.

  The shape of the core material 7 of the vacuum heat insulating material 6 in the present embodiment is a right-angled isosceles triangle. However, the shape is not necessarily a right-angled isosceles triangle, and is a quadrangle, a polygon, a circle, an L shape, and combinations thereof. An arbitrary shape can be selected.

  As shown in FIG. 2, the core material 7 is covered with a laminate film 8. The laminate film 8 includes a heat welding layer 9, a gas barrier layer 10, and a protective layer 11.

  Here, the heat-welded layer 9 is for pressure-sealing the inside of the laminate film 8 by being heated and pressurized, and a low-density polyethylene film, a chain-like low-density polyethylene film, a high-density polyethylene film, a polypropylene film, Polyacrylonitrile films and the like, and mixtures thereof can be used.

  The gas barrier layer 10 prevents air from entering the core material 7 through the surface of the laminate film 8, and a laminate film having a metal foil or a metal vapor-deposited layer can be used.

  The protective layer 11 prevents damage to the surface of the laminate film 8 due to dust, dust, etc., friction, bending, and pinholes due to piercing of the core material 7, such as nylon film or polyethylene terephthalate film. Can be used.

  In the present embodiment, the laminate film 8 has the configuration of the heat welding layer 9, the gas barrier layer 10, and the protective layer 11. However, the laminate film 8 may have a configuration of three or more layers.

  Here, the heat-welded layer 9 of the laminate film 8 is disposed so as to be on the core material 7 side. The core material 7 is fixed on the laminate film 8 on one surface, and has a fixing portion 12. The fixing portion 12 is formed only on a part of the surface of the core material 7. However, in order to fix the core material 7 on the laminate film 8, a minimum area and strength of the fixing portion are necessary.

  The fixing portion 12 may be formed over the entire surface of the core material 7.

In the vacuum heat insulating material 6 in the present embodiment, the core material 7 is fixed on the laminate film 8 by means such as heating and pressurization, and then a three-side sealed bag is formed with the laminate film 8, It can be obtained by performing vacuum evacuation to reduce the pressure and sealing the opening of the bag when a predetermined pressure is reached. As described above, the vacuum heat insulating material 6 in the present embodiment has the core material 7 made of the laminate film. Since the position of the core material is fixed during the manufacture of the vacuum heat insulating material, it is possible to easily manufacture the vacuum heat insulating material without any misalignment of the core material.

  Moreover, since the fixing | fixed part 12 is formed only in a part of surface of the core material 7, the vacuum heat insulating material 6 in this Embodiment can isolate | separate the core material 7 and the laminate film 8 easily at the time of disassembly, Recyclability as a product can be improved.

  Moreover, since the vacuum heat insulating material 6 in this Embodiment is comprised with the some core material 7, it can be bent between core materials and the applicability is increasing.

(Embodiment 2)
FIG. 3 is a plan view of the vacuum heat insulating material in Embodiment 2 of the present invention. FIG. 4 is a three-dimensional view of the vacuum heat insulating material in Embodiment 2 of the present invention.

  As shown in FIG. 3, the vacuum heat insulating material 13 is arranged so that a pentagonal core material 14 and a hexagonal core material 15 form a development view of a three-dimensional structure, and a three-dimensional structure is provided between the core materials. There is a folding line 16 to form.

  The vacuum heat insulating material 13 in FIG. 4 is formed by bending the vacuum heat insulating material 13 shown in FIG.

  In the present embodiment, the core material 14 is pentagonal and the core material 15 is hexagonal. However, any combination of core material shapes is possible, and combinations of core materials of various shapes are possible. The folding line located between the materials can be freely designed, and a vacuum heat insulating material that forms a desired three-dimensional structure can be produced.

(Embodiment 3)
FIG. 5 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 3 of the present invention.

  As shown in FIG. 5, the core material 18 of the vacuum heat insulating material 17 in the present embodiment is made of a material having a thickness of 4 mm and containing silica powder as a main component, and the core material 19 is a material having a thickness of 1 mm and containing glass wool as a main component. It is composed of

  As described above, in the vacuum heat insulating material 17 in the present embodiment, since the core materials having different thicknesses coexist, when the vacuum heat insulating material 17 in the present invention is applied, the portion corresponding to the core material 19 is It becomes possible to apply the vacuum heat insulating material 17 to a space saving space from the portion corresponding to the core material 18.

(Embodiment 4)
FIG. 6 is a plan view of a vacuum heat insulating material according to Embodiment 4 of the present invention. In FIG. 6, the vacuum heat insulating material 20 has the same material configuration as the vacuum heat insulating material 6 in the first embodiment.

  In the vacuum heat insulating material 20 in the present embodiment, the core material 7 is fixed on the laminate film 8 by means of heating and pressurization, and then the core material 7 is covered with the gas barrier laminate film 8 in the chamber. The pressure inside the chamber is reduced, and the laminate film 8 is thermally welded when a predetermined degree of vacuum is reached.

  Thermal welding is performed by heating the entire surface of the laminate film 8 from above and below with a planar silicon rubber heater. The laminate film 8 is thermally welded at all locations where the core material 7 does not exist, and each core material 7 is independent. Arranged in the space.

  As described above, in the present embodiment, since the plurality of core members 7 are positioned in independent spaces, even if the degree of vacuum in the space containing the specific core member is reduced, Without lowering the degree of vacuum of the space containing the other core material, it is possible to minimize the deterioration of the heat insulation performance.

  Moreover, in this Embodiment, since all the locations in which the core material 7 does not exist are laminated in the laminate film 8, the fin part of a vacuum heat insulating material edge part can be shortened, and the core material part in a vacuum heat insulating material surface occupies. An area part can be enlarged and an effective heat insulation area can be enlarged.

  Furthermore, by cutting off at the peripheral part of the core material 7, the vacuum heat insulating material can be made into a substantially core material shape, and a vacuum heat insulating material of an arbitrary shape can be easily formed.

  As described above, in the vacuum heat insulating material according to the present invention, since the core material is fixed on the laminate film, the core material can be fixed at a predetermined position even during production, and a desired vacuum heat insulating material can be easily obtained. it can.

  In particular, the vacuum heat insulating material according to the present invention is suitable for a material composed of a plurality of core materials, a vacuum heat insulating material composed of a plurality of core materials can be bent, and its applicability is high. In addition to winter clothes such as jackets and coats that require flexibility, it can also be applied to trousers, hats, gloves, bedding futons, cushions, curtains, and the like.

  Furthermore, the vacuum heat insulating material according to the present invention can also be applied to heat insulation and cold insulation equipment that requires energy saving, information equipment that requires space saving, electronic equipment, and the like.

The top view of the vacuum heat insulating material in Embodiment 1 of this invention Fig. 1 А-А cross-sectional view The top view of the vacuum heat insulating material in Embodiment 2 of this invention Three-dimensional view of vacuum heat insulating material in Embodiment 2 of the present invention Sectional drawing of the vacuum heat insulating material in Embodiment 3 of this invention The top view of the vacuum heat insulating material in Embodiment 4 of this invention Plan view showing conventional vacuum insulation

Explanation of symbols

6, 13, 17, 20 Vacuum heat insulating material 7, 14, 15, 18, 19 Core material 8 Laminate film 9 Heat welding layer 12 Adhering part

Claims (8)

  In a vacuum heat insulating material composed of a gas barrier laminate film having a heat-welded layer and a core material, and the core material sealed by the laminate film under reduced pressure, the predetermined position on the heat-welded layer side of the laminate film The vacuum heat insulating material which arrange | positioned the core material and fixed the heat welding layer and the said core material on the one surface of the said core material at least.   The vacuum heat insulating material according to claim 1, wherein a part of the surface of the core material is fixed to the heat welding layer of the laminate film.   The vacuum heat insulating material according to claim 1 or 2, comprising a plurality of core materials.   The vacuum heat insulating material according to claim 3, wherein core materials having different shapes coexist.   The vacuum heat insulating material according to claim 3 or 4, wherein core materials having different thicknesses coexist.   The vacuum heat insulating material as described in any one of Claim 3 to 5 with which the core material comprised from a different material coexisted.   The vacuum heat insulating material according to any one of claims 3 to 6, wherein each of the plurality of core members is disposed in an independent space.   The vacuum heat insulating material according to any one of claims 1 to 7, wherein a laminate film is heat-welded along the periphery of the core material.

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