JP2009041648A - Vacuum heat insulating material and construction member applying the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material with a plurality of core materials, having a wider effective heat insulating area and improved heat insulating performance. <P>SOLUTION: The vacuum heat insulating material 8 comprises, at least, the plurality of core materials 9, a cover material 10, and an isolating film 11 which can be thermally welded to a thermally welded layer of the cover material. The plurality of core materials 9 are isolated from one another in two or more independent vacuum spaces by the isolating film 11. The adjacent core materials 9a, 9b are simply isolated from each other by the isolating film 11, and so a clearance between the core materials can be narrowed to a clearance corresponding to the thickness of the film. Thus, the vacuum heat insulating material has improved heat insulating performance because of less heat leak from a gap between the core materials 9a, 9b and a wider effective heat insulating area. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum heat insulating material and a building member to which the vacuum heat insulating material is applied.

  In recent years, as a measure against global warming, which is a global environmental problem, there has been an active movement to promote energy saving in buildings such as houses along with home appliances and industrial equipment, and a heat insulating material having excellent heat insulating performance has been demanded.

  As a high-performance heat insulating material, there is a vacuum heat insulating material, in which a core material serving as a spacer is inserted into a jacket material having a gas barrier property, and the inside is sealed under reduced pressure.

  Here, when the vacuum heat insulating material has a configuration having a plurality of core materials and each core material is positioned in an independent vacuum space, (1) a core material portion separated from the end surface of the jacket material Since the influence of intrusion gas from the end face is small, it is easy to maintain the thermal insulation performance as a whole vacuum insulation material. (2) Even if a vacuum break occurs in one place, it has an influence on other core parts. Single core material that can minimize deterioration of heat insulation performance due to its small size, (3) High flexibility of shape of core material and vacuum heat insulating material, and shape design according to application is possible. Compared to the vacuum heat insulating material having, there are various merits.

  Conventionally, as a vacuum heat insulating material composed of a plurality of core materials, a plurality of fillers are arranged at predetermined intervals in a bag-like exterior body, and this is placed on a portion located between each of the filler bodies in the exterior body. A vacuum heat insulating material having a structure including a seal portion that is divided into a plurality of unit airtight portions by forming a cross-shaped seal portion has been reported (for example, see Patent Document 1).

  Further, as a vacuum heat insulating material composed of a plurality of core materials, a filler is enclosed in an exterior material, and is composed of a sealed body in a low vacuum state, and the sealed body is divided into a plurality of sealed rooms. Has been reported (for example, see Patent Document 2).

  FIG. 4 is a perspective view of a conventional vacuum heat insulating material described in Patent Document 1. As shown in FIG. As shown in FIG. 4, the vacuum heat insulating material 1 includes a bag-shaped exterior body 2 formed by joining the edges of a non-breathable film and exhausting the air inside, and a predetermined interval between the exterior body 2. And a plurality of units provided with the filler 3 in the bag-like exterior body 2 formed in a portion located between the filler 3 in the bag-like exterior body 2. A seal portion 4 that is divided into an airtight portion is provided.

  Since each unit airtight part is in a state of being adjacent to each other via a seal part, the length of the part in contact with the outside air in the film joint part constituting the unit airtight part is one filling in one bag-like exterior body. Since the body is relatively short compared to the vacuum heat insulating material that seals the body under reduced pressure, it becomes difficult to receive gas intrusion from the outside at each unit airtight part, suppressing an increase in internal pressure, and maintaining a heat insulating effect over a long period of time it can.

  FIG. 5 is a cross-sectional view of a conventional vacuum heat insulating material described in Patent Document 2. As shown in FIG. 5, the vacuum heat insulating material 5 includes a sealing material in which a filler 6 is enclosed in an exterior material 7 and is in a low vacuum state, and the sealing material is divided into a plurality of sealed rooms. .

Since the vacuum heat insulating material 5 is composed of a large number of cells, even if a vacuum is leaked at one location, the leak does not reach other locations, so that the durability is improved. It can be fixed by a simple and inexpensive method.
Japanese Patent Laid-Open No. 7-98090 Japanese Patent Laid-Open No. 7-139690

  However, in the configuration of Patent Document 1, in order to form a seal portion between the fillers, it is necessary to provide a certain interval between the fillers. Since the space between the fillers is formed only from the exterior body that does not have heat insulation performance, the effective heat insulation area is small, and heat leakage increases by providing an interval, so the heat insulation performance is excellent as a whole vacuum insulation material There was a problem that could not be obtained.

  Moreover, even in the configuration of Patent Document 2, it is necessary to provide a constant interval between the fillers in order to thermally weld the fillers. In the embodiment, the filler is thermally welded between the fillers by about 2 mm. To that end, it is necessary to provide a gap of 5 mm or more between the fillers. Since the space between the fillers is formed only from the exterior material that does not have heat insulation performance, the effective heat insulation area is small, and heat leakage is increased by providing an interval, so the heat insulation is excellent as a whole vacuum heat insulation material There was a problem that performance could not be obtained. In the embodiment, the above-mentioned problems are solved by combining two vacuum heat insulating materials in a concave and convex manner as shown in FIG. 6, but there are problems such as an increase in cost and deterioration in workability.

  The present invention solves the above-described conventional problems, and is a vacuum heat insulating material composed of a plurality of core materials, and has an object of providing a vacuum heat insulating material having a large effective heat insulating area and excellent heat insulating performance. To do.

  In order to solve the above-described conventional problems, the vacuum heat insulating material of the present invention can be thermally welded to at least a plurality of core materials, a gas barrier outer jacket material having a thermal welding layer, and a thermal welding layer of the outer jacket material. And having the core material and the isolating film between the outer jacket materials facing each other, and the outer cover material is heated so as to follow the shape of the core material. A welded vacuum heat insulating material, wherein the core material is separated into two or more independent vacuum spaces by the isolating film.

  Since the adjacent core materials are isolated by the isolation film, the interval between the core materials can be freely changed. Therefore, since the space | interval of a core material can be narrowed to the space | interval of the isolation film thickness, a heat leak can be suppressed and it becomes possible to expand an effective heat insulation area.

  Even if the vacuum heat insulating material of the present invention has a configuration having a plurality of core materials, the space between the core materials can be reduced, so heat insulation is small, and the effective heat insulating area is wide, so that the heat insulating performance is excellent. Have Furthermore, since a plurality of core members are present in independent vacuum spaces, gas intrusion into each independent space is less likely to occur, and thus heat insulation performance can be maintained over a long period of time.

  The vacuum heat insulating material according to claim 1 includes at least a plurality of core materials, a gas barrier outer covering material having a heat welding layer, and a heat welding layer of the outer covering material and an isolating film that can be heat welded. A vacuum heat insulating material having a core material and an isolation film between the outer cover materials facing each other, and the outer cover material being thermally welded so as to follow the shape of the core material, Since the core material is separated into two or more independent vacuum spaces, the interval between the core materials can be freely changed, so that the interval between the core materials can be reduced to the thickness of the isolation film. Therefore, there is little heat leak and a large effective heat insulation area can be secured, so that excellent heat insulation performance can be obtained.

  In order to dispose the core material in an independent space when there is no isolation film, it is necessary to weld the heat-welded layers of the jacket material to each other, so the core material needs to be at least 5 mm apart. is there. Therefore, if the thickness of the isolating film is made thinner than that, this interval can be reduced.

  In addition, in the conventional configuration, the insulation between the core materials is formed only from the jacket material, so heat insulation performance can not be expected, but if a material with excellent heat insulation performance is used for the isolation film, the performance does not reach the core material However, since heat insulation is possible by the film for isolation, heat insulation performance can be imparted even between the core materials that did not have heat insulation performance conventionally.

  The core material of the present invention is not particularly specified as long as it has a high porosity such as fiber, powder, foamed resin, porous body, and thin film laminate. For example, glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool, silicon carbide fiber, etc. can be used in the fiber system, silica, perlite, carbon black in the powder system, urethane foam, phenol in the foam resin Foam, styrene foam, etc. can be used. Moreover, it is also possible to use these mixtures and a molded object. When the initial heat insulation performance is required, it is desirable to use a fiber in which fibers are laminated perpendicularly to the heat transfer direction or a molded body thereof. .

  Moreover, the jacket material in this invention should just be a structure which has a heat welding layer and a barrier layer at least, and the structure is not specified in particular.

  Low-density polyethylene, linear low-density polyethylene, high-density polyethylene, unstretched polypropylene, polyacrylonitrile, unstretched polyethylene terephthalate, unstretched nylon, unstretched ethylene-polyvinyl alcohol copolymer resin, etc. are used for the heat welding layer Yes, it is not specified.

  Moreover, in order to suppress gas intrusion from the outside, a metal foil, a vapor deposition film, a coating film, a plastic film, etc. can be used as a barrier layer. The type and number of layers are not particularly specified. The metal foil is not particularly specified such as aluminum, stainless steel, iron or a mixture thereof. Moreover, the material of the plastic film used as the base material for vapor deposition or coating is not particularly specified, such as polyethylene terephthalate, ethylene-polyvinyl alcohol copolymer resin, polyethylene naphthalate, nylon, polypropylene, polyamide, and polyimide. Further, the material for vapor deposition is not particularly specified such as aluminum, cobalt, nickel, zinc, copper, silver, silica, alumina, diamond-like carbon, and a mixture thereof. Also, the coating material is not particularly specified such as PVA, polyacrylic acid resin or a mixture thereof.

  Further, it is possible to further provide a film on the outer layer or the intermediate layer for the purpose of improving pinhole resistance and abrasion resistance, imparting flame retardancy, and further improving barrier properties.

  Here, the film provided on the outer layer or the intermediate layer is nylon, ethylene / tetrafluoroethylene copolymer resin, polyethylene terephthalate, polyethylene naphthalate, polypropylene, ethylene-polyvinyl alcohol copolymer resin, etc. , Not particularly specified.

  Moreover, the isolation film of the present invention is not particularly specified as long as it can be welded to the heat-welded layer of the jacket material, and may be a single-layer film or a laminate film. The material is not particularly specified, and the same material as that of the jacket material can be used. In addition, in order to narrow the space | interval between core materials, since the one where the thickness of the film for isolation is thinner is desirable, 2 mm or less is desirable. Moreover, you may use multiple sheets for the film for isolation according to the shape of a core material or a vacuum heat insulating material.

  In order to further improve the initial heat insulation performance and the temporal heat insulation performance of the vacuum heat insulating material, it is possible to use a moisture adsorbent or a gas adsorbent. The type of adsorbent is not particularly specified, and calcium oxide, magnesium oxide, barium oxide, zeolite, silica gel, hydrotalcite, etc. can be used. Even if these are used alone, they can be used in combination of two or more. May be.

  In addition, the shapes of the core material and the vacuum heat insulating material in the present invention can be any shape made of a triangle, a quadrangle, a polygon, an L shape, or a combination thereof depending on the location where heat insulation is required. In order to further narrow the interval between the core materials, it is desirable to select a shape that can be spread as the core material shape.

  In addition, the vacuum heat insulating material can be produced by heating and pressurizing the entire surface of the outer cover material including the portion with the core material under reduced pressure, or by thermally welding only the outer peripheral portion of the outer cover material under reduced pressure. Although there is a method of welding the inside of the jacket material in a high temperature atmosphere after sealing the inside under reduced pressure, there is no particular designation.

  The vacuum heat insulating material according to claim 2 is the vacuum heat insulating material according to claim 1, wherein the core material is positioned so as to be alternately above or below the isolating film, thereby more easily vacuum insulating material. Can be produced.

  As a method of alternately arranging the core material, the core material is placed on the jacket material with the heat-welded layer facing upward, the isolating film is further placed thereon, the core material is further placed thereon, and the heat is applied. There is a method of covering the welding layer with the outer cover material facing down, a method of sandwiching the core material pre-adhered so as to alternate on or under the isolating film, and the like, Not particularly specified.

  The vacuum heat insulating material according to claim 3 is the vacuum heat insulating material according to claim 1 or 2, wherein the interval between the core materials is substantially the same as the thickness of the isolating film, so that a plurality of core materials are separated. Since there is only an interval of about the thickness of the film for heat, there is little heat leak and a wide effective heat insulation area can be secured, so that excellent heat insulation performance can be obtained.

  The spacing between the cores is preferably the same as the thickness of the isolation film, but substantially the same is natural even when the cores are lined up so that the spacing between the cores is as small as possible. Including gaps that occur.

  The vacuum heat insulating material according to claim 4 is the vacuum heat insulating material according to any one of claims 1 to 3, wherein the isolation film is not located at the end of the vacuum heat insulating material, thereby Since the cross-sectional area of the end face is not increased, the temporal heat insulation performance can be ensured.

  In addition, it can be confirmed whether the film for isolation exists in an edge part by measuring the thickness of the heat welding layer of an edge part.

  The vacuum heat insulating material according to claim 5 is the vacuum heat insulating material according to any one of claims 1 to 4, wherein the isolation film has a film that can be welded to the heat-welded layer of the outer cover material in the outer layer. Because it is a laminate film, it is possible to further suppress gas permeation between independent spaces by using a material with a high barrier property for the inner layer. Even if it breaks, it can suppress that the penetration | invasion gas from there penetrate | invades into another core material part.

  The structure of the isolating film of the present invention may be a heat-welded layer, a barrier layer, a heat-welded layer, or the like, but is not particularly specified as long as it can be welded to the jacket material. Further, the material is not particularly specified, and the same material as that used for the jacket material can be used. It should be noted that it is desirable to avoid the use of metal foil in order to prevent the isolating film from being thermally crosslinked as much as possible.

  The building member according to claim 6 is a building member to which the vacuum heat insulating material according to any one of claims 1 to 5 is applied. By applying the vacuum heat insulating material having excellent heat insulating performance, an energy saving effect is obtained. Can be maintained.

  Since the core material is present in an independent space, even if a vacuum break occurs at one place by nailing or the like, the effect does not propagate to the other, so the workability is excellent. Moreover, in the case of a vacuum heat insulating material having a plurality of core materials, the work efficiency is improved in construction as compared with the case where a plurality of vacuum heat insulating materials having a single core material are attached.

  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. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a plan view of a vacuum heat insulating material according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 and 2, the vacuum heat insulating material 8 includes a plurality of core materials 9, a gas barrier outer covering material 10, and an isolation film 11.

  In the vacuum heat insulating material 8, the core materials 9 are arranged at predetermined intervals, respectively, and sealed under reduced pressure by the jacket material 10. Moreover, the film 9 for isolation is provided so that each core material 9 may be located in the independent vacuum space. The covering material 10 has at least a heat-welding layer 12, the isolation film 11 is a laminated film having a heat-welding layer 13 as an outer layer, and the material of the heat-welding layer 13 is the covering material 10. This material is capable of being welded to the heat-welded layer 12.

  First, the manufacturing method of the vacuum heat insulating material 8 is demonstrated. First, the core material 9a is arranged with the heat-welding layer 12 of one sheet of covering material 10 facing upward. Next, the isolation film 11 is placed, and a plurality of core materials 9b are further arranged. Further, this is covered with another outer cover material 10 so that the heat-welded layers 12 face each other. The outer cover material 10 and the isolation film 11 are welded under reduced pressure to obtain the vacuum heat insulating material 5 in which the core materials 9a and 9b are isolated in independent vacuum spaces.

  By using the film for isolation, since the space | interval of core materials can be narrowed, since the heat leak was small and the effective heat insulation area was wide, the heat insulation performance as the whole vacuum heat insulating material improved. In addition, since the core material is arranged in an independent vacuum space by the isolating film, even if a vacuum break occurs due to nailing at one core material portion, a vacuum break will occur in the other core material portion. Absent. Further, the isolating film suppresses gas intrusion from the vacuum break portion.

  In addition, in this Embodiment, although it is the structure which does not have the film for isolation to the edge part of a jacket material, you may be to an edge part. However, since the gas intrusion area at the end portion is expanded when the end portion is reached, it is preferable that the end portion is not reached from the viewpoint of securing the heat insulation performance over time.

  In this embodiment, the isolation film is a laminate film, but it may be a single layer film. However, the laminate film has a higher barrier property when used in applications where there is a possibility of vacuum breaks, such as nailing, because the intrusion gas from the vacuum break part is less likely to enter other core parts. Is preferred.

  Further, in the present embodiment, the core material is arranged to be staggered above and below the isolation film, but any other configuration may be used as long as the core material is arranged in an independent space by the isolation film. It does not matter even if it is the composition of. However, arranging them in a staggered manner requires a smaller number of isolating films and is easier to manufacture.

(Embodiment 2)
FIG. 3 is a cross-sectional view of a building according to Embodiment 2 of the present invention.

  In the building 14 of the present invention, the vacuum heat insulating material 8 according to the first embodiment is disposed between the outer wall 15 and the inner wall 16, below the floor in contact with the floor board 17, or on the attic in contact with the roof material 18.

  The building 14 configured in this manner exhibited excellent heat retention and energy saving effect by applying the vacuum heat insulating material 8 having excellent heat insulating performance.

  As described above, the vacuum heat insulating material according to the present invention has a structure having a plurality of core materials and has excellent heat insulating performance. For this reason, it can be used for buildings that require heat insulation performance as well as workability. Moreover, even if it uses it for cold storage apparatuses, such as a refrigerator, and thermal insulation apparatuses, such as an electric water heater, a rice cooker, a thermal insulation cooker, and a water heater, it shows the outstanding energy-saving effect. It can also be applied to office equipment such as notebook computers, copiers, printers, and projectors that require high thermal insulation performance in a small space. It can also be applied to uses that require cold storage such as container boxes and cooler boxes.

The top view of the vacuum heat insulating material in Embodiment 1 of this invention AA line sectional view of a vacuum heat insulating material in Embodiment 1 of the present invention. Sectional drawing of the building in Embodiment 2 of this invention Perspective view of conventional vacuum insulation Cross section of conventional vacuum insulation Cross section of conventional vacuum insulation

Explanation of symbols

8 Vacuum heat insulating material 9, 9a, 9b Core material 10 Outer material 12 Thermal welding layer 11 Isolation film 14 Building

Claims (6)

  The outer shell includes at least a plurality of core members, a barrier-type outer covering material having a heat-welding layer, and a heat-welding layer and an isolating film that can be heat-welded, and the heat-welding layers face each other. A vacuum heat insulating material having the core material and the isolating film between the base materials, and the outer cover material being welded along the core material shape, wherein the core material is independent by the isolating film. A vacuum heat insulating material characterized by being isolated by two or more vacuum spaces.   The vacuum heat insulating material according to claim 1, wherein the core material is positioned so as to alternate above or below the isolation film.   The vacuum heat insulating material according to claim 1 or 2, wherein a distance between the core members is substantially the same as a thickness of the isolation film.   The said heat insulating film is not in the edge part of a vacuum heat insulating material, The vacuum heat insulating material as described in any one of Claim 1 to 3 characterized by the above-mentioned.   The vacuum insulating material according to any one of claims 1 to 4, wherein the isolation film is a laminate film having a barrier layer.   The building member which applied the vacuum heat insulating material as described in any one of Claim 1 to 5.