JP2007016928A - Vacuum heat insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heating insulating performance and planarity in a vacuum heat insulating material covering a plurality of core materials by a covering material having gas barrier performance, and positioning each core material in an independent vacuum space. <P>SOLUTION: In the vacuum heat insulating material 5, the plurality of core materials 6 is covered by the covering material 7 with gas barrier performance, having a heat welding layer on an inner side face, and decompressed and sealed therein, and each of the plurality of core materials 6 is positioned in the mutually independent vacuum space. Since recessed parts of a recessed and projecting face formed by a core material part having the core material 6 between the covering materials 7, and a non-core material part 8 not having the core materials 6 between the covering materials 7 are filled with a heat insulating material 9, heat insulating performance in the recessed part (the non core material part 8) of the recessed and projecting face, and unevenness of a vacuum heat insulating material 5 surface are improved, heat insulating performance as the whole vacuum heat insulating material 5 is also improved, and the vacuum heat insulating material 5 with superior applicability can be provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vacuum heat insulating material in which a plurality of core materials are covered with a jacket material having gas barrier properties, and the respective core materials are positioned in mutually independent vacuum spaces.

  A conventional vacuum heat insulating material composed of a plurality of core materials is shown in FIG. 7 (see, for example, Patent Document 1).

  In the vacuum heat insulating material 1 described in Patent Document 1, a plurality of core materials 2 are sealed in a jacket material 3 and sealed in a low vacuum state. Here, the core members 2 are individually sealed.

Since the vacuum heat insulating material 1 configured as described above is composed of a plurality of core materials 2, it can be cut between the core material 2 and the core material 2, so that the dimensions of the vacuum heat insulating material 1 are adjusted. Can be easily done. Further, even if the vacuum of one core material 2 leaks, the leak does not reach the other core material 2 and thus has durability, and the vacuum heat insulating material 1 can be fixed by a simple method such as a nail. .
Japanese Patent Laid-Open No. 7-139690

  However, in the conventional configuration, the non-core material portion 4 in the vacuum heat insulating material 1 does not have the heat insulating performance because the core material 2 does not exist, and the heat insulating performance as a whole of the vacuum heat insulating material 1 is reduced. .

  This invention solves the said conventional subject, and it aims at ensuring heat insulation performance in the vacuum heat insulating material comprised with a some core material.

  In order to solve the above conventional problems, the vacuum heat insulating material according to the present invention covers a plurality of core materials with a gas barrier outer cover material having a heat-welded layer on the inner surface, and seals them under reduced pressure. In a vacuum heat insulating material that is positioned in a vacuum space independent from each other, by a core material portion having the core material between the jacket materials and a non-core material portion having no core material between the jacket materials One of the concave portions of the uneven surface to be formed is filled with a heat insulating material.

  Thereby, since the concave portion (non-core material portion) of the uneven surface is filled with the heat insulating material, the heat insulating performance can be improved.

  The vacuum heat insulating material of the present invention is composed of a plurality of core materials, and each core material is positioned in a space independent from each other, so that it can be bent, and a vacuum leak in each core material propagates to other core materials. In addition to improving the heat insulation performance of the concave and convex surface (non-core material) and the unevenness of the vacuum heat insulating material surface, the heat insulation performance of the entire vacuum heat insulating material is also improved and applicability It is possible to provide an excellent vacuum heat insulating material.

  In the invention of the vacuum heat insulating material according to claim 1, the plurality of core materials are covered with a gas barrier outer covering material having a heat-welded layer on the inner surface and sealed under reduced pressure, and the plurality of core materials are independent from each other. In a vacuum heat insulating material positioned in a vacuum space, an uneven surface formed by a core material portion having the core material between the jacket materials and a non-core material portion having no core material between the jacket materials. One of the recesses is filled with a heat insulating material, which improves the heat insulation performance of the concave and convex surface (non-core material) and the surface of the vacuum heat insulating material, improving the heat insulation performance of the entire vacuum heat insulating material. Therefore, it is possible to provide a vacuum heat insulating material excellent in applicability.

  The invention of the vacuum heat insulating material according to claim 2 is such that all of the heat welding layers of the jacket material of the portion where the heat welding layers in the non-core material portion of the invention of claim 1 are in close contact with each other are welded. The area of the non-core material portion on the surface of the vacuum heat insulating material is eliminated by eliminating useless portions where the heat-welded layers in the non-core material portion are in close contact with each other at atmospheric pressure but are not welded together. It is easy to reduce the ratio, and at the same time as improving the heat insulating performance of the vacuum heat insulating material as a whole, it is possible to reduce the amount of heat insulating material used to fill the concave portion (non-core material portion) of the uneven surface.

  The invention of the vacuum heat insulating material according to claim 3 is the invention according to claim 1 or 2, wherein the surface of the core material portion and the surface of the non-core material portion form the same plane on one side of the vacuum heat insulating material. The concave portion is formed only on one side of the vacuum heat insulating material, and the concave portion on one side is filled with the heat insulating material to complete the heat insulating performance and ensure the flatness of the vacuum heat insulating material.

  The invention of a vacuum heat insulating material according to claim 4 is the invention according to any one of claims 1 to 3, wherein the surface of the heat insulating material filling the concave portion and the surface of the core material portion form the same plane. Therefore, it becomes easy to apply the vacuum heat insulating material to the object by pasting.

  The invention of a vacuum heat insulating material according to claim 5 is the invention according to any one of claims 1 to 4, wherein the heat insulating material filling the concave portion is a soft foamed resin, and the concave portion (non-core) Even if the material portion is filled with a heat insulating material and subjected to heat insulation reinforcement, the vacuum heat insulating material can be bent, and the applicability of the vacuum heat insulating material can be maintained.

  The invention of a vacuum heat insulating material according to a sixth aspect is the invention according to any one of the first to fifth aspects, wherein the heat insulating material filling the concave portion is bonded to the surface of the jacket material of the concave portion. Therefore, the heat insulating material can be firmly held against the vacuum heat insulating material, and the heat insulating reinforcement of the concave portion (non-core material portion) can be maintained over the usage period of the vacuum heat insulating material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the same components as those of the above-described embodiments will be denoted by the same reference numerals, and detailed description thereof will be omitted. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a vacuum heat insulating material according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the vacuum heat insulating material of the same embodiment, and FIG. 3 is a heat insulating material for a recess in the vacuum heat insulating material of the same embodiment. It is a top view which shows the state before filling.

  As shown in FIG. 1, the vacuum heat insulating material 5 of the present embodiment includes a plurality of cores 6 covered with a gas barrier outer shell material 7 having a heat-welded layer on the inner surface and sealed under reduced pressure. The material 6 is positioned in a vacuum space that is independent from each other, and a core material portion having the core material 6 between the jacket materials 7 and a non-core material portion 8 having no core material 6 between the jacket materials 7. All of the concave portions of the concave and convex surfaces formed by and are filled with a heat insulating material 9 made of soft polyurethane foam (soft foamed resin), and the surface of the heat insulating material 9 filling the concave portions and the surface of the core portion are flush with each other. The heat insulating material 6 filling the concave portion is bonded to the surface of the outer cover material 7 of the concave portion (non-core material portion 8) with a hot melt adhesive.

  Here, the heat insulating material 9 uses a flexible polyurethane foam, but in addition to foams such as polystyrene, polyethylene, and polypropylene, those having heat insulating properties can be used.

  Moreover, although the vacuum heat insulating material 5 has filled all the recessed parts (non-core material part 8) with the heat insulating material 9, you may fill a required part among the recessed parts (non-core material part 8) with the heat insulating material 9. FIG.

  As shown in FIG. 3, the vacuum heat insulating material 5 is composed of a plurality of core materials 6, and each core material 6 is held in a vacuum space independent from each other by a heat welding portion 10 in which the heat welding layers are heat welded to each other. Has been. In addition, the peripheral part of the core material 6 is not heat-welded.

  Here, the material used for the core material 6 may be a 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.

  The shape of the core material 6 of the vacuum heat insulating material 5 in the present embodiment is a quadrangle, but an arbitrary shape composed of a polygon, a circle, an L shape, and a combination thereof can be selected.

  The jacket material 7 of the vacuum heat insulating material 5 has a laminate structure, and is composed of a heat-welded layer, a gas barrier layer, and a protective layer in order from the core material 6 side.

  Here, the heat-welded layer is for pressure-sealing the inside of the jacket material 7 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 prevents air from entering the core material 6 through the surface of the jacket material 7 and is a metal foil layer in the present embodiment.

  The protective layer prevents damage to the surface of the jacket material 7 due to dust, dust, etc., friction, bending, and pinholes due to piercing of the core material 15, such as nylon film or polyethylene terephthalate film. Can be used.

  The thermal conductivity of the core material 6 of the vacuum heat insulating material 5 thus produced is 0.0020 W / m · K at an average temperature of 24 ° C., which is about 10 times that of a rigid urethane foam that is a general-purpose heat insulating material. Insulation performance.

  As described above, the vacuum heat insulating material 5 in the present embodiment includes a plurality of core materials 6 that are covered with the gas barrier jacket material 7 having a heat-welded layer on the inner surface and sealed under reduced pressure. In the vacuum heat insulating material 5 positioned in the vacuum space independent from each other, the core material portion having the core material 6 between the jacket materials 7 and the non-core material portion 8 having no core material 6 between the jacket materials 7. Since the concave portion of the concave and convex surface formed by is filled with the heat insulating material 9, the heat insulating performance in the concave portion of the concave and convex surface (non-core material portion 8) and the concave and convex on the surface of the vacuum heat insulating material 5 are improved. As a heat insulating performance, the vacuum heat insulating material 5 excellent in applicability can be provided.

  Moreover, since the surface of the heat insulating material 9 that fills the concave portion and the surface of the core material portion form the same plane in the vacuum heat insulating material 5 of the present embodiment, the vacuum heat insulating material 5 is attached to the object to be applied. This makes it easier to apply.

  Further, in the vacuum heat insulating material 5 of the present embodiment, since the heat insulating material 9 that fills the concave portion is a soft polyurethane foam (soft foamed resin), the concave portion (non-core material portion 8) is filled with the heat insulating material 9 to provide heat insulation reinforcement. Even if applied, the vacuum heat insulating material 5 can be bent, and the applicability of the vacuum heat insulating material 5 can be maintained.

  Moreover, the vacuum heat insulating material 5 of this Embodiment has the heat insulating material 9 which fills a recessed part adhere | attached on the surface of the jacket material 7 of a recessed part (non-core material part 8) with a hot-melt-adhesive, and is vacuum The heat insulating material 9 can be firmly held with respect to the heat insulating material 5, and the heat insulating reinforcement of the concave portion (non-core material portion 8) can be maintained over the usage period of the vacuum heat insulating material 5.

(Embodiment 2)
FIG. 4 is a plan view of the vacuum heat insulating material according to Embodiment 2 of the present invention, and FIG. 5 is a plan view showing a state before the recesses in the vacuum heat insulating material of the same embodiment are filled with the heat insulating material.

  As shown in FIG. 4, the vacuum heat insulating material 11 of the present embodiment includes a plurality of cores 6 that are covered with a gas barrier outer covering material 7 having a heat-welded layer on the inner surface and sealed under reduced pressure. The material 6 is positioned in a vacuum space that is independent of each other, and a non-core material portion 12 in which the core material 6 is between the jacket material 7 and the core material 6 is not between the jacket material 7. All the concave portions of the concave-convex surface formed by and are filled with a heat insulating material 9 made of soft polyurethane foam (soft foam resin), and the outer cover material of the portion where the heat-welded layers in the non-core portion 12 are in close contact with each other 7 are all welded, and the surface of the heat insulating material 9 filling the concave portion and the surface of the core portion form the same plane, and the heat insulating material 6 filling the concave portion is a concave portion (non-core portion). It is bonded to the surface of the outer cover material 12) with a hot melt adhesive.

  Here, the heat insulating material 9 uses a flexible polyurethane foam, but in addition to foams such as polystyrene, polyethylene, and polypropylene, those having heat insulating properties can be used.

  Moreover, although the vacuum heat insulating material 11 has filled all the recessed parts (non-core material part 12) with the heat insulating material 9, you may fill a required part with the heat insulating material 9 among recessed parts (non-core material part 12).

  In the first embodiment, the vacuum heat insulating material 11 in the second embodiment and the vacuum heat insulating material 5 in the first embodiment are the same as those in the first embodiment, although the heat welding layers are in close contact with the peripheral edge of the core material 6 at atmospheric pressure. Whereas there are portions where the weld layers are not welded together, in the second embodiment, all of the heat weld layers of the outer cover material 7 in the portions where the heat weld layers including the peripheral portion of the core material 6 are in close contact with each other. It differs only in that it is welded.

  As described above, in addition to the effects of the vacuum heat insulating material 5 in the first embodiment, the vacuum heat insulating material 11 in the present embodiment is the outer cover material of the portion where the heat welding layers in the non-core material portion 12 are in close contact with each other. Since all of the heat-welded layers 7 are welded, the heat-welded layers in the non-core material portion 12 are in close contact with each other at atmospheric pressure, but there is no wasted part where the heat-welded layers are not welded together, It is easy to reduce the area ratio of the non-core material part 12 on the surface of the heat insulating material 11, and simultaneously improve the heat insulating performance of the vacuum heat insulating material 11, and at the same time, the concave and convex surfaces (non-core material part 12) are formed. The usage-amount of the heat insulating material 9 to fill can be reduced.

(Embodiment 3)
FIG. 6 is a cross-sectional view of the vacuum heat insulating material in Embodiment 3 of the present invention.

  As shown in FIG. 6, the vacuum heat insulating material 13 covers a plurality of core materials 6 with a gas barrier outer covering material 7 having a heat-welded layer on the inner surface, and seals the plurality of core materials 6 with each other. It is positioned in an independent vacuum space, and on one side of the vacuum heat insulating material 13 (the lower surface in FIG. 6), between the surface of the core part having the core material 6 between the outer material 7 and the outer material 7 The surface of the non-core material part 14 without the core material 6 forms the same plane, and the core material 6 is interposed between the jacket material 7 on the other surface (upper surface in FIG. 6) of the vacuum heat insulating material 13. All of the concaves and convexes of the uneven surface formed by the core part having a core and the non-core part 14 having no core material 6 between the outer cover material 7 are filled with a heat insulating material 9 made of soft polyurethane foam (soft foam resin). All of the heat-welded layers of the jacket material 7 in the portion where the heat-welded layers in the non-core material portion 14 are in close contact with each other are welded. The surface of the heat insulating material 9 filling the concave portion and the surface of the core portion form the same plane, and the heat insulating material 6 filling the concave portion is the surface of the outer cover material 7 of the concave portion (non-core portion 14). It is bonded with hot melt adhesive.

  Here, the heat insulating material 9 uses a flexible polyurethane foam, but in addition to foams such as polystyrene, polyethylene, and polypropylene, those having heat insulating properties can be used.

  Moreover, although the vacuum heat insulating material 13 has filled all the recessed parts (non-core material part 14) with the heat insulating material 9, you may fill a required part among the recessed parts (non-core material part 14) with the heat insulating material 9. FIG.

  In the second embodiment, the vacuum heat insulating material 13 in the third embodiment and the vacuum heat insulating material 11 in the second embodiment are formed with uneven surfaces formed by the core material portion and the non-core material portion 12 on both surfaces of the vacuum heat insulating material 11. On the other hand, the third embodiment is different only in that the surface of the core part and the surface of the non-core part 14 form the same plane on one side of the vacuum heat insulating material 13.

  As described above, in the vacuum heat insulating material 13 in the present embodiment, the surface of the core material portion and the surface of the non-core material portion 14 form the same plane on one side of the vacuum heat insulating material 13, so that the recess is a vacuum heat insulating material. 13 is formed only on one side, and the concave portion on one side is filled with the heat insulating material 9 to complete the heat insulating performance and ensure the flatness of the vacuum heat insulating material.

  As described above, the vacuum heat insulating material according to the present invention is composed of a plurality of core materials, and the core materials are located in independent spaces from each other, so that they can be bent, and there are other vacuum leaks in the individual core materials. In addition to not propagating to the core material, the heat insulation performance in the concave portion (non-core material portion) of the uneven surface is improved, so the heat insulation performance as a whole vacuum heat insulation material is also improved and excellent in applicability A vacuum insulation can be provided.

  Therefore, the vacuum heat insulating material of the present invention can be applied not only to winter clothes such as jackets and coats that require flexibility, but also to pants, hats, gloves, bedding futons, cushions, curtains, and the like. Moreover, since site construction property is very high, it is suitable for use as a heat insulating material for buildings.

Sectional drawing of the vacuum heat insulating material in Embodiment 1 of this invention Plan view of the vacuum heat insulating material of the same embodiment The top view which shows the state before filling the recessed part in the vacuum heat insulating material of the embodiment with a heat insulating material The top view of the vacuum heat insulating material in Embodiment 2 of this invention The top view which shows the state before filling the recessed part in the vacuum heat insulating material of the embodiment with a heat insulating material Sectional drawing of the vacuum heat insulating material in Embodiment 3 of this invention Cross section of conventional vacuum insulation

Explanation of symbols

5, 11, 13 Vacuum heat insulating material 6 Core material 7 Cover material 8, 12, 14 Non-core material part 9 Heat insulating material

Claims (6)

  A vacuum heat insulating material in which a plurality of core materials are covered with a gas barrier outer covering material having a heat-welded layer on an inner surface and sealed under reduced pressure, and the plurality of core materials are respectively positioned in independent vacuum spaces. Vacuum insulation in which one of the concave and convex portions formed by a core material part with the core material between the material and a non-core material part without the core material between the outer materials is filled with a heat insulating material. Wood.   2. The vacuum heat insulating material according to claim 1, wherein all of the heat welding layers of the outer cover material of the portion where the heat welding layers in the non-core material part are in close contact with each other are welded.   The vacuum heat insulating material according to claim 1 or 2, wherein the surface of the core part and the surface of the non-core part form the same plane on one side of the vacuum heat insulating material.   The vacuum heat insulating material according to any one of claims 1 to 3, wherein a surface of the heat insulating material filling the concave portion and a surface of the core material portion form the same plane.   The heat insulating material which fills a recessed part is a soft foamed resin, The vacuum heat insulating material as described in any one of Claims 1-4.   The vacuum heat insulating material according to any one of claims 1 to 5, wherein a heat insulating material filling the concave portion is bonded to a surface of a covering material of the concave portion.

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