JP2006037971A - Vacuum heat insulating material and its manufacturing method as well as clothing using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulting material with a skin material thermally welded along the shape of a core material for securing shaping and sealing performance. <P>SOLUTION: A protecting layer 12 having a tensile elongation of 100% or more is provided outside a gas barrier layer 11 of the skin material 8. Thus, the vacuum heat insulating material 6 easily follows tensile stress generated in the outermost layer during heating pressure and has improved shaping and sealing performance with no wrinkles on the surface. The protecting layer 12 is a nylon film having superior mechanical strength such as impact resistance and bending resistance for suppressing the occurrence of pin holes in the surface of the vacuum heat insulating material 6 while maintaining the high heat insulating performance of the vacuum heat insulating material 6 for a long period. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum heat insulating material that is heat-welded so that a jacket material follows a core shape.

  Vacuum insulation made by covering the porous core material with a plastic laminate film jacket material having a gas barrier layer and a heat-welded layer, and sealing under reduced pressure is a reliable sealing technology. From the viewpoint of productivity, a heat welding method is generally used in which the bonding surfaces of two plastic laminate films are sealed by heating and pressing.

  In this way, the vacuum heat insulating material to be formed in advance, the outer cover material made of plastic laminate film is formed into a bag shape larger than the core material, the core material is inserted into the bag-shaped outer cover material, and after decompression, The opening is sealed by heat welding.

  Therefore, at the four sides of the outer peripheral portion of the vacuum heat insulating material having such a configuration, a peripheral portion composed of a heat-welded portion of the outer cover material and an outer cover material that does not include a core material and is in close contact Is formed.

  In applying the vacuum heat insulating material, various approaches have been conventionally made in order to make the peripheral portion as small as possible.

  FIG. 6 is a perspective view showing a conventional vacuum heat insulating material, and FIG. 7 is a perspective view showing a manufacturing process of the conventional vacuum heat insulating material.

6 and 7, the vacuum heat insulating material 1 is obtained by placing the core material 3 on the film-like thin body 2, folding the thin body 2 so as to wrap the core material 3, and vacuuming the inside of the thin body 2 in this state. The thin bodies 2 joined to each other by pulling and folding are bonded to each other around three sides by heat welding. At this time, it is disclosed that the protrusion 5 by heat fusion is not formed on the end surface 4 of the vacuum heat insulating material 1 by bringing the folded portion of the thin body 2 into close contact with one end surface of the core material 3 (for example, , See Patent Document 1).
JP-A-7-269781

  However, in the conventional configuration shown in Patent Document 1, although the heat welded portion is not formed on one end surface of the vacuum heat insulating material, there are heat welded portions on the remaining three sides. At the same time, the bag-shaped outer cover material, which was made larger to contain the core material, was composed of only the outer cover material that did not include the core material between the core material and the heat-welded portion when the inside was decompressed. The part remains. For this reason, the width of the peripheral portion formed around the core material is increased, and there is a problem that the peripheral portion needs to be bent when applied.

  Moreover, since the part comprised only from the jacket material which does not include a core material between the core material and a heat welding part is formed, the shape of a vacuum heat insulating material is restrict | limited and the vacuum heat insulating material of arbitrary shapes It was difficult to produce.

  The present invention solves the above-described conventional problems, and by forming a heat-welded portion along the core material and making the peripheral edge portion formed around the core material only the heat-welded portion, the effective heat insulation area is increased. In addition to being able to handle large shapes, it can handle complex shapes, and in the case of multiple core materials, the flexibility of bending can be increased by appropriately arranging the core material, which makes it extremely adaptable to the target object. The purpose of the vacuum heat insulating material is to ensure the moldability and sealing properties in a wide range of uses. Moreover, it aims at providing the clothing article to which the vacuum heat insulating material of this invention is applied.

  In order to solve the above-described conventional problems, the vacuum heat insulating material of the present invention has a gas barrier outer covering material having a heat welding layer and a plate-like core material, and the heat welding layers face each other. The core material is formed under reduced pressure and sealed between the jacket materials, and the heat-welding layers facing each other follow the core material shape by heating and pressurizing including a portion with the core material between the jacket materials. In the heat insulating vacuum heat insulating material, a protective layer having a tensile elongation of 100% or more is provided on the outer side of the gas barrier layer of the jacket material, and the tensile stress generated in the outermost layer at the time of heating and pressing is applied. It becomes easy to follow, and generation | occurrence | production to the vacuum heat insulating material surface can be prevented.

  Moreover, the manufacturing method of the vacuum heat insulating material of the present invention includes a core plate on the surface of the vacuum heat insulating material at the time of heat welding by performing heating and pressurization at a pressure higher than atmospheric pressure with a hot plate made of an elastic body. Absorbs the irregularities of the jacket material portion where the core material does not exist, does not cause forging on the surface of the vacuum heat insulating material, and has sufficient sealing strength even at the boundary between the core material and the jacket material portion where the core material does not exist Can be heat-welded.

  In the vacuum heat insulating material of the present invention, since a protective layer having a tensile elongation of 100% or more is provided on the outer side of the gas barrier layer of the jacket material, wrinkles are not generated on the surface of the vacuum heat insulating material, and the moldability and sealing properties are excellent.

  Moreover, said vacuum heat insulating material can be easily manufactured with the manufacturing method of the vacuum heat insulating material of this invention.

  The invention of the vacuum heat insulating material according to claim 1 includes a gas barrier outer covering material having a heat welding layer and a plate-like core material, and the outer heat insulating material between the outer covering materials facing each other. The core material is hermetically sealed under reduced pressure, and by heating and pressing including a portion where the core material is between the jacket materials, the opposing heat-welded layers are thermally welded so as to follow the shape of the core material. In the vacuum heat insulating material, a protective layer having a tensile elongation of 100% or more is provided outside the gas barrier layer of the jacket material, and it is easy to follow the tensile stress generated in the outermost layer during heating and pressurization. Thus, no carrying occurs on the surface of the vacuum heat insulating material, and a vacuum heat insulating material having excellent moldability and sealing properties can be obtained.

  The invention of the vacuum heat insulating material according to claim 2 is the invention according to claim 1, wherein the protective film is a nylon film, so that the nylon film has an impact resistance in addition to the functions and effects of the first aspect. Therefore, the generation of pinholes on the surface of the vacuum heat insulating material can be suppressed, and the high heat insulating performance of the vacuum heat insulating material can be maintained over a long period of time.

  The invention of the vacuum heat insulating material according to claim 3 is the invention according to claim 1 or claim 2, wherein the thickness of the vacuum heat insulating material is 0.5 mm or more and 5 mm or less, and there is no core material. The material portion can be a vacuum heat insulating material having a heat welding portion so as to follow the core material shape.

  If the thickness of the vacuum heat insulating material greatly exceeds 5 mm, wrinkles are generated on the surface of the outer heat insulating material where the core material does not exist, and a vacuum heat insulating material that secures moldability and sealability is obtained. I can't.

  On the other hand, when the thickness of the vacuum heat insulating material is less than 0.5 mm, the thickness of the core material is insufficient, and it becomes difficult to ensure excellent heat insulating performance.

  Invention of the manufacturing method of the vacuum heat insulating material of Claim 4 is a manufacturing method of the vacuum heat insulating material as described in any one of Claims 1-3, Comprising: A core material is between outer jacket materials. When heat-pressing including a certain part, a heat plate made of an elastic body is used, and at the time of heat welding, the elastic body is a core material on the surface of the vacuum heat insulating material and the outer cover material part where the core material does not exist Since the unevenness is absorbed and no flaws are generated on the surface of the vacuum heat insulating material, it is possible to manufacture a vacuum heat insulating material having excellent heat moldability and having a heat welded portion along the core shape.

  Invention of the vacuum heat insulating material of Claim 5 uses the press apparatus which can pressurize above atmospheric pressure in invention of Claim 4, and the manufacturing method of Claim 4 In addition to the effects and effects of the above, at the boundary between the core material and the outer jacket material portion where the core material does not exist, heat welding is performed so as to have sufficient seal strength by applying a pressure higher than atmospheric pressure at the time of heat welding. Thus, it is possible to manufacture a vacuum heat insulating material that ensures a sealing property over the entire surface of the heat-welded portion.

  The invention of the clothing article according to claim 6 is the one in which the vacuum heat insulating material according to any one of claims 1 to 3 is applied. As the vacuum insulation material is applied to ensure that there is no wrinkles on the surface of the vacuum insulation material, even during movement such as when using clothing, the possibility of breaking the bag is small and the vacuum insulation material is high over a long period of time. It is possible to provide a clothing article that maintains heat insulation performance and is excellent in heat retention and heat insulation effects.

  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 of FIG.

  In FIG. 1, a vacuum heat insulating material 6 covers a core material 7 having a thickness of 3 mm made of a compression-molded body of powders formed into nine substantially regular octagons with a covering material 8 having a gas barrier laminate structure. The inside of the covering material 8 is decompressed, and the heat welding portion 9 of the covering material 8 is provided along the periphery of the core material 7 so that each of the nine core materials 7 is located in an independent space. ing.

  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.

  Although the shape of the core material 7 of the vacuum heat insulating material 6 in the present embodiment is substantially octagonal, it is not particularly required to be substantially octagonal, and is from a triangle, a rectangle, a polygon, a circle, an L shape, and combinations thereof. An arbitrary shape can be selected.

  Further, the vacuum heat insulating material 6 can be formed by cutting into a substantially core material shape so that the heat welding portion 9 having a predetermined width remains between the heat insulating portion 9 and the core material 7.

  In FIG. 2, the jacket material 8 is a laminate film composed of a heat welding layer 10, a gas barrier layer 11, and a protective layer 12 in order from the core material 7 side. Here, a nylon film is used as the protective layer 12. Here, the nylon film is a biaxially stretched nylon film having a longitudinal and lateral tensile elongation of 120% and 110%, respectively, and a small shrinkage anisotropy. The tensile elongation shall be in accordance with the measurement method of K7127 of Japanese Industrial Standard (JIS).

  The heat-welded layer 10 is for heat-welding to seal the inside of the jacket material under reduced pressure, a low-density polyethylene film, a chain-like low-density polyethylene film, a high-density polyethylene film, a polypropylene film, a polyacrylonitrile film, An unstretched polyethylene terephthalate film, an ethylene vinyl alcohol copolymer film, and the like, and mixtures thereof can be used.

  The gas barrier layer 11 prevents air from entering the core material 7 through the surface of the jacket material 8, and a laminate film having a metal foil or a metal vapor deposition layer can be used.

  The protective layer 7 prevents damage to the surface of the jacket material 8 due to dust, dust, etc., friction, bending, and pinholes due to piercing of the core material, and is used in the present embodiment. In addition to the nylon film, a known material having a tensile elongation of 100% or more and excellent strength characteristics can be used.

  As described above, in the present embodiment, the protective layer 12 having a tensile elongation of 100% or more is provided on the outer side of the gas barrier layer 11 of the outer covering material 8, so that it occurs in the outermost layer at the time of heating and pressing. It becomes easy to follow the tensile stress, and the vacuum heat insulating material 6 excellent in formability and sealability can be obtained without generating wrinkles on the surface.

  In the present embodiment, the protective layer 12 is made of a nylon film having excellent mechanical strength such as impact resistance and bending resistance, so that the generation of pinholes on the surface of the vacuum heat insulating material 6 can be suppressed, and the vacuum heat insulating material. It is possible to maintain a high heat insulation performance of 6 over a long period of time.

  Moreover, in this Embodiment, the thickness of the core material 7 is 3 mm, the thickness as the vacuum heat insulating material 6 is 0.5 mm or more and 5 mm or less, and the part of the jacket material 8 where the core material 7 does not exist is And it can be set as the vacuum heat insulating material 6 which has the heat welding part 9 so that the shape of the core material 7 may be followed.

(Embodiment 2)
FIG. 3 is a conceptual diagram showing a method for manufacturing a vacuum heat insulating material in Embodiment 2 of the present invention.

  In FIG. 3, the vacuum heat insulating material 6 is manufactured by a method using an apparatus composed of a chamber 13, a vacuum pump 14, a hot plate 15, and a press device 16.

  The manufacturing method of the vacuum heat insulating material 6 using the apparatus comprised as mentioned above is demonstrated.

  First, the core material 7 and the jacket material 8 are installed inside the chamber 13. Then, the air inside the chamber 13 is exhausted by a connected vacuum pump 14 and reaches a predetermined internal pressure, and is then thermally welded over the entire surface of the jacket material 8 by a hot plate 15 disposed inside the chamber 13. Thus, the vacuum heat insulating material 6 is obtained.

  Here, the hot plate 15 is made of silicon rubber which is an elastic body. Further, the outer covering material 8 is thermally welded over the entire surface at a pressure of about 0.2 MPa, which is equal to or higher than the atmospheric pressure due to the load from the connected press device 16.

  As described above, in the embodiment of the present invention, by using the hot plate 15 made of silicon rubber that is an elastic body, the elastic body is formed on the surface of the vacuum heat insulating material 6 with the core material 7 at the time of heat welding. Absorbing the unevenness of the portion of the outer jacket material 8 where the core material 7 does not exist and does not cause the surface to be carried, the vacuum heat insulating material 6 having the heat welding portion 9 along the core material shape is excellent. It can be manufactured.

  Further, in the embodiment of the present invention, since the press device 16 capable of pressurization at atmospheric pressure or higher is used, heat is also generated at the boundary between the core material 7 and the outer cover material 8 where the core material 7 does not exist. By pressurizing to above atmospheric pressure at the time of welding, it is possible to perform heat welding so as to have sufficient sealing strength, and it is possible to manufacture the vacuum heat insulating material 6 that ensures sealing performance over the entire surface of the heat welding portion 9. .

(Embodiment 3)
FIG. 4 is a front view of a clothing article to which the vacuum heat insulating material according to Embodiment 3 of the present invention is applied, and FIG. 5 is a rear view of the clothing article to which the vacuum heat insulating material according to Embodiment 3 of the present invention is applied.

  In FIG. 4, the clothing article 17 is a jacket, and the number and size of the core materials and the shape of the jacket material are adjusted for the jacket, and the surface described in the first embodiment is free from wrinkles and has formability. And the vacuum heat insulating material 18 which is excellent in sealing performance is applied.

  The vacuum heat insulating material 18 may be manufactured by manufacturing a rectangular vacuum heat insulating material of a predetermined size and then cutting it according to the jacket. In that case, you may manufacture a vacuum heat insulating material so that the core material of the cut | disconnected useless part may not be arrange | positioned in a film from the beginning.

  Here, since the vacuum heat insulating material 18 can be bent in four directions, by appropriately selecting the size of the core material, it is possible to ensure flexibility suitable for a moving cold protection device. We can provide a thin jacket with high heat insulation performance that utilizes high heat insulation performance.

  In addition, if the vacuum heat insulating material 18 is inserted in the bag part formed in the jacket, the vacuum heat insulating material 18 can be hidden and only the vacuum heat insulating material 18 is inserted into the bag part formed in the jacket. Thus, the jacket and the vacuum heat insulating material 18 can be easily integrated without worrying about damaging the vacuum heat insulating material 18, and the vacuum heat insulating material 18 can be removed and replaced relatively easily.

  Further, if the vacuum heat insulating material 18 is detachably attached to the jacket by Velcro, (registered trademark), fasteners, buttons, hooks or other locking devices, it becomes a warm climate and does not require high heat insulation. It is convenient to remove the vacuum heat insulating material 18 from the jacket at the time of cleaning.

  The jacket in the present embodiment may be provided with holes on the surface of the vacuum heat insulating material 18 if air permeability is required. When the vacuum heat insulating material 18 provided with holes is used, sweat vapor can be discharged from the holes, and the inside of the jacket is comfortable without being steamed.

  In the present embodiment, the jacket is described as the clothing article 17, but the present invention can also be applied to other clothing.

  Furthermore, it can also be applied to heat insulation measures for equipment that requires space saving, such as heat insulation and cold insulation equipment that requires energy saving, and information equipment and electronic equipment.

  As described above, in the present embodiment, there is little possibility of breaking the bag because there is no wrinkle on the surface of the vacuum heat insulating material 18 even during movement such as bending when the clothing article 17 is used. It is possible to provide a clothing article 17 that maintains the high heat insulation performance of the material 18 and is excellent in heat retention and heat insulation effects.

  As described above, the vacuum heat insulating material according to the present invention has no wrinkles on the surface, is excellent in moldability and sealability, and is less likely to break even in clothing articles that require flexibility during use. In addition to a jacket, it can be applied to pants, hats, gloves, bedding futons and cushions.

  In addition, the present invention can also be applied to a device that requires space saving, such as a heat insulation and cold storage device that requires energy saving, an information device, and an electronic device.

The top view of the vacuum heat insulating material in Embodiment 1 of this invention AA line sectional view of FIG. The conceptual diagram which shows the manufacturing method of the vacuum heat insulating material in Embodiment 2 of this invention. Front view of the clothing article to which the vacuum heat insulating material in Embodiment 3 of the present invention is applied The rear view of the clothing article which applied the vacuum heat insulating material in Embodiment 3 of this invention A perspective view showing a conventional vacuum heat insulating material The perspective view which shows the manufacturing process of the conventional vacuum heat insulating material

Explanation of symbols

6, 18 Vacuum heat insulating material 7 Core material 8 Cover material 10 Heat welding layer 11 Gas barrier layer 12 Protective layer 15 Hot plate 16 Press device 17 Clothing article

Claims (6)

  A gas barrier covering material having a heat-welding layer; and a plate-shaped core material, wherein the core material is sealed under reduced pressure between the covering materials facing each other. In the vacuum heat insulating material in which the opposing heat-welding layers are heat-welded so as to follow the shape of the core material by heating and pressurizing including a portion where the core material exists between the materials, the gas barrier layer of the outer material A vacuum heat insulating material, characterized in that a protective layer having a tensile elongation of 100% or more is provided on the outside.   The vacuum insulating material according to claim 1, wherein the protective layer is a nylon film.   The thickness of a vacuum heat insulating material is 0.5 mm or more and 5 mm or less, The vacuum heat insulating material of Claim 1 or Claim 2 characterized by the above-mentioned.   It is a manufacturing method of the vacuum heat insulating material as described in any one of Claims 1-3, Comprising: It comprises an elastic body when heat-pressing including the part with a core material between jacket materials. The manufacturing method of the vacuum heat insulating material characterized by using a hot plate.   The method for producing a vacuum heat insulating material according to claim 4, wherein a press dressing capable of being pressurized at atmospheric pressure or higher is used.   The clothing article to which the vacuum heat insulating material as described in any one of Claims 1-3 is applied.

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