JP2010149913A - Heat insulating container, method for manufacturing heat insulating material for heat insulating container, and method for manufacturing heat insulating container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating material for a heat insulating container capable of easily surrounding (forming) the heat insulating material on an internal container constituting the heat insulating container for storing a liquid such as LLC in a heat-insulated state, and having excellent mass productivity. <P>SOLUTION: The heat insulating container for storing the liquid in a heat-insulated state in which a heat insulating material is formed in a three-dimensional manner so as to surround an internal container 20 by combining a plurality of formed bodies 90 made of inorganic fibers. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat insulating container for storing and storing a liquid, and particularly to a heat insulating container for storing and storing cooling water for a vehicle engine.

  In recent years, there has been a strong demand for lower fuel consumption of vehicle engines as a countermeasure against global warming. In particular, improving the fuel efficiency during warm-up operation immediately after engine startup has become a major issue.

  For example, for the purpose of improving fuel efficiency immediately after starting the vehicle engine, the coolant for the vehicle engine (long life coolant: hereinafter referred to as LLC) warmed by preheating the engine is stored in a heat insulating container. There is a technology that circulates LLC, which is kept warm at the next engine start, to the engine to promote warm-up operation of the engine.

  Insulated containers that retain and store the LLC are required to have a high thermal insulation performance to maintain the LLC heated by the preheating of the engine at a high temperature until the next engine start, and to reduce the manufacturing cost associated with the reduction in vehicle cost. . Moreover, since this heat insulation container is installed in an engine room, the shape which can be accommodated in the limited space in an engine room which changes with vehicles is calculated | required strongly, and it is made from resin in patent document 1 with respect to the request | requirement. A heat insulating container is described in which a high performance vacuum heat insulating material is formed around the inner container.

JP 2008-105748 A JP 2004-308691 A JP 2004-84847 A

  By the way, in a vacuum heat insulating material in which a heat insulating material made of inorganic fibers is sealed under reduced pressure with a gas barrier film, since the volume change of the inorganic fibers before and after the reduced pressure sealing is large, wrinkles occur on the surface of the gas barrier film, and the pin is attached to the gas barrier film. There has been a problem that defects such as holes and cracks are likely to occur, heat retention performance is reduced due to an increase in surface area, and design properties are deteriorated.

  Then, in order to control the volume change of inorganic fiber, addition of a binder is examined. For example, Patent Document 2 describes the formation of a heat insulating material using an organic binder. Patent Document 3 describes the formation of a heat insulating material using an inorganic binder.

  However, when an organic binder is used as in Patent Document 2, the binder component may be vaporized after vacuum sealing to lower the degree of vacuum (pressure increase) and the heat insulation performance may deteriorate. It must be completely removed by heat treatment or the like. Thereby, the heat insulating material was restored to near the original volume, and there was a problem that the volume change at the time of vacuum sealing could not be controlled.

  On the other hand, when an inorganic binder is used, the volatile components after vacuum sealing are eliminated, but in order to control the volume change rate of inorganic fibers, many binders are required, and solid heat conduction increases by adding this binder. There was a problem that the thermal conductivity increased.

  In addition, it is a well-known fact that inorganic fibers such as glass wool have a reduced thermal conductivity due to a decrease in solid heat conduction when the fiber diameter is reduced. However, since the manufacturing cost increases when the average fiber diameter is 2 μm or less, inorganic fibers having an average fiber diameter of 3 to 5 μm have been used for vacuum heat insulating materials that require high performance regardless of whether or not a binder is added. .

  However, in recent years, adverse effects on the human body of small-diameter inorganic fibers have been pointed out, and the movement of increasing the diameter of inorganic fibers used for heat insulating materials is spreading worldwide. For example, the European Commission Directive 96/96 / EC states that (load geometric average of fiber diameter) −2 × (standard deviation) should be 6 μm or more. Inorganic fibers of less than 6 μm may be subject to regulation.

  Therefore, in view of the above problems, the present invention performs molding of inorganic fibers that reduce the volume change of inorganic fibers before and after vacuum encapsulation using thick fibers having an average fiber diameter of 6 μm or more, and thermal conductivity. An object of the present invention is to provide a heat-insulating container that minimizes heat loss by using a vacuum heat-insulating material in which the rise of the temperature is controlled, and a method for manufacturing the same. As a result, it is installed in the engine room and the like, contributing to lower fuel consumption and leading to reduction of greenhouse gases emitted from automobiles. It is another object of the present invention to provide a heat insulating material and a heat insulating container for a heat insulating container that can easily surround (form) the heat insulating material in the inner container constituting the heat insulating container and is excellent in mass productivity.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a heat-insulating container for keeping and storing a liquid, an inner container having a liquid inflow / outlet portion, and a sheet for accommodating the inner container and forming a gas barrier layer And a heat insulating space in which a heat insulating material and a gas adsorbing material are enclosed between the inner container and the outer material to form a decompression space, and the heat insulating material is formed by combining a plurality of inorganic fiber molded bodies. What is characterized by being three-dimensionally molded so as to surround the container is provided. Here, the gas barrier layer is a layer that restricts gas permeation. The oxygen permeability of the laminate film with the gas barrier layer measured according to JIS-K7126-1 should be 1.1 × 10 ^-11 m ³ / m ² · s · MPa or less, 1.1 × 10 ^-12 m ³ / m ² · s · MPa or less is preferable. Moreover, in order to improve heat insulation, the heat insulation space is controlled by the pressure (reduced pressure state) lower than atmospheric pressure, and should just be 0.01-100 Pa, Preferably it is 0.1-10 Pa.
2nd invention provides the said heat insulation container characterized by the molded object made from an inorganic fiber being a flat plate, L shape, U shape, U shape, a concave shape, or a convex shape.
According to a third aspect of the present invention, there is provided the heat insulating container characterized in that the inorganic fiber molded body is oriented in a compressed state in a direction perpendicular to the heat transfer direction in the long glass fiber and is retained by an inorganic binder. To do. Here, the long glass fiber is made of SiO ₂ , Al ₂ O ₃ , added with alkaline earth metal oxides such as CaO and MgO, and alkali metal oxides such as K ₂ O and Na ₂ O. . A raw material melted at a high temperature is spun at a high speed from the bottom of a pot having pores, cooled and wound up, and is a fiber not containing an unfibrinated product having a diameter of 45 μm or more and having the same composition.
According to a fourth aspect of the present invention, there is provided a resin-made inner container having a liquid inflow / outlet portion, a sheet-like exterior material for housing the inner container, and the inner container and the exterior material, A heat insulating material manufacturing method for a heat insulating container provided with a heat insulating space in which a heat insulating material and a gas adsorbing material are enclosed to form a decompression space, wherein an inorganic fiber mat produced by needle punching an inorganic fiber is used as an inorganic binder. A heat insulating material that is impregnated in a dispersed aqueous solution, molded by drying moisture, then cut to form an inorganic fiber molded body, and a plurality of these inorganic fiber molded bodies are combined to surround the inner container The manufacturing method of the heat insulating material for heat insulation containers characterized by forming is provided.
5th invention provides the manufacturing method of the heat insulating material for the said heat insulation containers characterized by impregnating the inorganic fiber mat wound around the square-shaped core material in the aqueous solution in which the inorganic binder was disperse | distributed.
6th invention provides the manufacturing method of the heat insulating material for the said heat insulation containers characterized by inorganic fiber being a glass long fiber.
According to a seventh aspect of the present invention, there is provided a resin-made inner container having a liquid inflow / outlet portion, a sheet-like exterior material that accommodates the inner container, and the inner container and the exterior material, A method for manufacturing a heat-insulating container having a heat-insulating space in which a heat-insulating material and a gas adsorbing material are enclosed and formed as a decompression space, and a step of three-dimensionally molding inorganic fiber parts constituting the heat-insulating material in advance, After fitting the parts and surrounding the inner container, and housing the inner container surrounded by the inorganic fiber parts in the exterior material, after loading the gas adsorbent into the heat insulating space formed by the inner container and the exterior material, And a step of sealing the heat insulation space under reduced pressure.
The eighth invention further comprises a step of immersing the inorganic fiber mat in an aqueous solution containing an inorganic binder, and a step of drying the inorganic fiber mat containing the aqueous solution in a compressed state. A manufacturing method is provided.

The present invention has the following effects.
(1) Since the heat insulating material is formed by combining a molded body formed into a flat plate, an L shape, a U shape, a U shape, a concave shape or a convex shape, the heat insulating material is formed around the three-dimensional shape. Therefore, it is possible to provide a heat insulating material for a vacuum heat insulating material that is easy to manufacture and has excellent mass productivity at low cost.
(2) By using a high-density needle punched glass mat, the amount of binder added can be minimized, and the increase in the thermal conductivity of the heat insulating material due to the binder addition can be controlled.
(3) By forming a heat insulating material and reducing the volume change rate during vacuum sealing, the generation of wrinkles in the gas barrier outer packaging material during vacuum sealing is reduced. Thereby, defects such as pinholes and cracks caused by wrinkles can be suppressed.
(4) It is possible to provide a vacuum heat insulating material in which both thick inorganic fibers having an average fiber diameter of 6 μm or more and heat insulating performance can be achieved, and adverse effects on the human body are reduced.

FIG. 1 is a longitudinal sectional view of a heat insulating container according to the present invention.
The heat insulating container 10 that retains and retains a liquid includes a resin inner container 20 having liquid inflow and outlet portions 21 and 21, and an outer packaging material 50 that accommodates the inner container 20 and forms a gas barrier layer therearound. A heat insulating space 40 is provided between the inner container 20 and the exterior material 50 so that the heat insulating material 41 and the gas adsorbing material 42 are enclosed in a reduced pressure state. As shown in FIG. 1, the heat insulation container 10 includes an interior material 30 that forms a gas barrier layer around the inner container 20, and a heat insulation space 40 is provided between the interior material 30 and the exterior material 50. Also good. In addition, in the inflow / outlet portions 21 and 21, flange members 60 and 60 for joining the exterior material 50 and the interior material 30 are mounted.

The heat insulating material 41 in the said structure is demonstrated including a manufacturing method.
As the inorganic fiber, a glass mat produced by needle punching a long glass fiber is used. There are various methods for producing this glass mat, and a method of depositing long glass fibers using an air stream and further matting by needle punching is preferred. A glass mat produced using a glass long fiber having a fiber length of 30 mm or more by this construction method is not broken (shortened) in the fiber length direction, but in the heat transfer direction (thickness direction of the heat insulating material). On the other hand, since the fiber orientation in the vertical direction can be obtained, good heat insulation performance can be obtained when a vacuum heat insulating material is produced.

  The average fiber diameter of the long glass fibers is preferably 6 μm to 20 μm in view of the problem of the present invention, but the fiber diameter is thick, the most common and cheap yarn is 6 to 9 μm, and the roving is 10 to 13 μm. Is suitable and easy to put into practical use. In addition, this long fiber is a mixture of roving and yarn, and as a result of investigation from the viewpoint of ease of manufacture with respect to the mixing ratio, the roving / yarn ratio is 50/50 to 0/100 (weight ratio). It is preferably 20/80 to 40/60 (weight ratio), more preferably 30/70 (weight ratio). As used herein, roving means a roving made of fibers (single fibers having a length of at least 100 times the diameter) without twisting, and yarn means one or more strands (single fibers without twist). Is a processed yarn twisted together.

The density and thickness of the glass mat can be adjusted by the weight per unit area (weight per unit area) and the number of needle punches (number of punches per unit area). The number of needle punches may be 5 to 40 / cm ² , and preferably 15 to 35 / cm ² . The thickness is not particularly specified because it depends on the required thickness of the vacuum heat insulating material. The density can be produced in the range of 50 to 160 kg / m ³ , but preferably 90 to 160 kg / m ³ . This is because, as the density of the glass mat is higher, the effect of controlling the volume change rate during vacuum sealing can be obtained even when the amount of binder added is small.

  The long glass fiber is sized to protect the fibers and strands. Generally, organic materials such as urethane, epoxy, polyvinyl alcohol, starch and vegetable oil are used as the sizing material. Since the sizing material may be vaporized after vacuum sealing to lower the degree of vacuum of the vacuum heat insulating material (pressure increase), it is necessary to remove it after manufacturing the glass mat. The sizing material may be removed by heat treatment, and it may be about 20 to 180 minutes at 300 to 700 ° C., but preferably 30 to 90 minutes at 400 to 600 ° C.

  Next, the molding of the glass mat will be described. An inorganic binder is dispersed in water and impregnated with a glass mat. At this time, the inorganic binder is selected from clay, water glass, colloidal silica, alumina sol, titania sol, zirconia sol, etc., but exhibits a binding force at a temperature of 100 to 250 ° C., which is a temperature at the time of moisture removal, and has a thermal conductivity As a result of examination from the viewpoint of the influence on the volume and the volume change rate after vacuum sealing, the layered clay mineral is most excellent, and among these, bentonite is preferred. When bentonite is used as an inorganic binder, an aqueous solution is prepared, but the amount of bentonite added to water is preferably 0.5 to 3.0 wt%, preferably 0.5 to 1.5 wt%, in other words, with respect to 100 parts by mass of glass fiber. What is necessary is just 2-15 mass parts, Preferably it is 2-8 mass parts.

  The bentonite aqueous solution is impregnated with a glass mat, formed into a predetermined shape, and dried. The drying temperature should just be 100 degreeC or more which is the boiling point of water, Preferably it is 200 degreeC or more. After drying, the end is cut and drilled to provide a heat insulating material for the heat insulating container.

  The heat insulating material is bonded and sealed using an exterior material 50 (or interior material 30 and exterior material 50) that forms a gas barrier layer. The exterior material 50 (or interior material 30 and exterior material 50) is a liquid inflow / outlet. It joins via the flange members 60 and 60 which were attached to 21 and 21. The flange member 60 is a cylindrical member having an inflow / outlet portion through-hole 61 at the center and a large-diameter upper end portion 62 and a lower end portion 64, and the upper surface of the upper end portion 62 has an upper flange surface 63. The lower surface of the lower end portion 64 forms a lower flange surface 65 (FIGS. 2 and 3). The material of the flange member 60 is selected from materials that can easily be thermally welded, such as polyethylene and polypropylene, and ethylene vinyl alcohol having a low gas permeability is preferable.

  The exterior material 50 (or the interior material 30 and the exterior material 50) has a gas barrier layer formed, and the material, structure, and form are not particularly limited as long as the gas permeability described above is satisfied. It can be used suitably. As an example of such an interior material and exterior material, a laminate film having a multilayer structure composed of “protective layer / gas barrier layer / adhesive layer” can be mentioned. The thickness of such a laminate film should just be 45-120 micrometers, Preferably it is 60-100 micrometers.

  The material for forming the adhesive layer is not particularly limited as long as it can be joined to the inner container, but in the present invention, a material having a low gas permeability is desirable. Specifically, when the material of the flange member 60 is polyethylene, the adhesive layer may be polyethylene, in the case of polypropylene, the adhesive layer may be polypropylene, and in the case of ethylene vinyl alcohol or metal, the adhesive layer is It is desirable to use ethylene vinyl alcohol. The thickness of the adhesive layer may be 10 to 70 μm, and preferably 30 to 50 μm.

  The material of the gas barrier layer is not particularly limited as long as gas permeation can be restricted. For example, a metal foil such as stainless steel foil or aluminum foil can be used, but low gas permeability, low cost, and high practicality. Aluminum foil can be suitably used. The thickness of a gas barrier layer should just be 5-30 micrometers, Preferably it is 6-15 micrometers.

  The protective layer is a layer that protects the gas barrier layer and, for example, prevents the formation of defects such as pinholes and cracks in the aluminum foil, and ensures the gas permeation preventing effect. Such a protective layer is preferably made of a resin such as polyester or nylon. The thickness of a protective layer should just be 10-15 micrometers, Preferably it is 20-40 micrometers. Further, a plurality of protective layers may be formed as necessary. According to such a configuration, it is possible to add a function that takes advantage of the characteristics of the resin.

When the interior material 30 is provided in addition to the exterior material 50, the interior material 30 includes an adhesive layer on the surface side 31 facing the inner container 20, but is joined to the lower flange surface 65 of the flange member 60. It is necessary to provide an adhesive layer on the part as well. Therefore, in the peripheral portion of the inflow / outlet portion 21, an orientation switching portion 32 is provided for reattaching the surface side 31 of the interior material 30 so as to face the heat insulating space 40 side (FIG. 4).
In addition, it is not limited to providing the direction switching part 32 in the interior material 30, as long as it is provided with an adhesive layer in a portion joined to the lower flange surface 65 other than a portion in contact with the inner container 20.

  In order to prevent the vacuum degree of the vacuum heat insulating layer from being lowered by the gas generated from the heat insulating material 41 or the gas that permeates through the joint resin and enters from the outside air, etc., is adsorbed inside the vacuum heat insulating layer 40. The agent 42 is encapsulated. The gas adsorbent 42 has a three-layer structure of a calcium oxide layer that adsorbs moisture, a barium / lithium alloy layer that adsorbs oxygen and nitrogen, and a cobalt oxide layer that adsorbs hydrogen. However, since the barium / lithium alloy layer has the property of adsorbing moisture in addition to oxygen and nitrogen, the adsorbability of each layer can be efficiently achieved as a structure located in the intermediate layer between the calcium oxide layer and the cobalt oxide layer. use.

  Here, the resin that can be used as the material of the resin inner container 20 is acrylonitrile butadiene styrene copolymer (ABS), acrylonitrile styrene copolymer (AS), EEA resin (EEA), epoxy resin (EP), ethylene. Vinyl acetate polymer (EVA), ethylene vinyl alcohol copolymer (EVOH), liquid crystal polymer (LCP), MBS resin (MBS), melamine formaldehyde (MMF), polyamide (PA), polybutylene terephthalate (PBT), polycarbonate resin (PC), polyethylene (PE), polyethylene terephthalate (PET), tetrafluoroethylene perfluoroalkyl vinyl ether polymer (PFA), polyimide (PI), polymethyl methacrylate (PMMA), polyacetal resin (POM), polypropylene (PP ), Polyphenylene sulfide resin (PPS), polystyrene (PS), polytetrafluoroethylene polytetrafluoroethylene (PTFE), polyurethane (PU), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and the like. By using such a resin, it becomes possible to mold an inner container having a complicated shape by injection molding or extrusion molding, and the production cost can be suppressed.

  Next, a heat insulating container and a heat insulating container according to the present invention will be described in detail as an example of a heat insulating container that forms a vacuum heat insulating material around an inner container in which a pipe-shaped liquid inflow / outlet is formed in a rectangular parallelepiped shape. The present invention is not limited to this.

First, in FIGS. 5-1 to 5-3, a method for manufacturing a heat insulating material is shown. The glass mat used had a roving / yarn blending weight ratio of 30/70, 18 needles / cm ² , a density of 90 kg / m ³ , and a thickness of 8 mm. Also, bentonite manufactured by Kunimine Kogyo was used as the binder, added to water to a concentration of 1.5 wt%, and stirred for 10 hours to obtain a binder solution.

  After the glass mat 80 was heat treated at 500 ° C. for 10 hours to remove the sizing material, as shown in FIG. 5-1, the binder solution 81 was impregnated and wound around the square core material 82 twice (FIG. 5-). 2). After drying this at 200 ° C. for 5 hours, the square core member 82 was pulled out. As shown in FIG. 5-3, cutting and punching (holes 91) were performed to obtain an inorganic fiber molded body 90 having a U-shaped cross section constituting the heat insulating material. However, only the portion corresponding to the inflow / outlet of the liquid is subjected to the perforating process. At this time, the thickness of the inorganic fiber molded body 90 was 14 mm.

  Here, the glass mat 80 is compressed to some extent by needle processing. However, as shown in FIG. 5A, when the glass mat 80 is wound around the square core member 82, tension is applied to the glass mat 80. The compressed state can be maintained as it is due to the binding force of the inorganic binder by drying in a compressed state. Note that it is not possible to obtain a desired compression rate only by needle processing. Also, if the compressed state is maintained only by the binding force of the inorganic binder without applying needle processing, the compressed state is maintained by applying tension, and the handling in the manufacturing process is poor, or the compression rate is reduced. There is a concern that a large amount of binder is required.

The following members were used as members other than the heat insulating material forming the heat insulating container. The inner container 20 uses a rectangular parallelepiped polyethylene container having an inner volume of about 3 L and a wall thickness of 8 mm. A liquid outflow inlet 21 having an outer diameter of 18.5 mm, an inner diameter of 13 mm, and a height of 30 mm is provided on one surface of the inner container 20. Provided. The flange member 60 is made of high-density polyethylene and has an outer diameter of 36 mm, an inner diameter of 20 mm, a height of 11 mm, and a wall thickness of 2 mm.
The laminate film used as the interior material 30 and the exterior material 50 is a polyethylene terephthalate layer (12 μm) serving as a protective layer / a nylon layer (15 μm) serving as a protective layer / aluminum foil (6 μm) serving as a gas barrier layer / a polyethylene layer serving as an adhesive layer. A multi-layered structure (50 μm) was used.
As the gas adsorbent (getter material) 42, COMBO3 GETTER manufactured by SAES Getters was used.

Next, a method for manufacturing a heat insulating container will be described with reference to FIGS.
First, as shown in FIG. 6A, circular holes 34 and 34 are formed in a laminating film 33 of 100 × 200 mm in accordance with a liquid inflow / outlet, a flange member 60 is provided on the adhesive layer side, and a ring heater 70 is provided. Using, heat-sealed and bonded. The heat welding conditions at this time are a pressing pressure of 0.2 MPa, a heater temperature of 180 ° C., and 6 seconds.
Then, as shown in FIG. 6B, the laminate film 33 is aligned so that the laminate film (interior material) 30 having a hole of 80 × 180 mm and the adhesive layer face each other, and the periphery 36 is thermally welded with a width of 10 mm. And pasted together.

Next, as shown in FIG. 6-3, the liquid inlet / outlet portion 21 of the inner container 20 is inserted into the inlet / outlet portion through hole 61 of the flange member 60, and then the inner container 20 is wrapped with the interior material 30. Then, it was formed into a cylindrical shape, and one side was bonded by heat welding 37.
And as shown to FIGS. 6-4, the open part of both ends was folded, and it heat-sealed with the rod-shaped heater 71, and packaged.

  Next, as shown in FIGS. 6-5, the above-mentioned inorganic fiber molded bodies 90, 90 having a U-shaped cross section were set in the inner container 20 whose periphery was packaged with the interior material 30. As a result, the heat insulating material 41 surrounding the inner container 20 can be formed very easily. This greatly contributes to mass production of the heat insulating container 10. Thus, if it is the inorganic fiber molded object of the shape which can surround the inner container 20 by combining, it will not be restricted to the thing of a cross-sectional U shape shown to FIGS. 6-5. For example, a flat plate, an L shape, a U shape, a concave shape, a convex shape, and the like can be given.

Next, as shown in FIGS. 6-6, the inner container 20 is inserted into a cylindrical laminate film (exterior material) 50 having a hole in accordance with the liquid inflow / outflow portion 21, and the ring-shaped heater 70. The exterior material 50 and the flange member 60 were heat-welded and bonded together.
And as shown to FIGS. 6-7, the one side of the open part was folded and heat-welded with the rod-shaped heater 71, and 3 directions except the bottom part were heat-welded and it was set as the bag shape. Further, it was left in an oven at 120 ° C. for 24 hours to evaporate water contained in the heat insulating material 90. After drying, it is carried into a chamber in an argon atmosphere, and after getting one getter material (about 7 g) as a gas adsorbent from the bottom where the exterior material 50 is opened, the inside of the chamber is decompressed to 1 Pa, and the exterior material 50 open parts were joined and sealed by a heater 71 provided in a vacuum chamber, and a heat insulating container 10 having a vacuum heat insulating layer having a thickness of 10 mm was manufactured. The volume change rate of the heat insulating material 90 was 28%.

About 100 ° C. warm water is poured into the heat insulation container 10 of the above embodiment and left to stand for about 10 minutes. After that, about 100 ° C. hot water is poured into the heat insulation container 10 again, and a thermocouple is inserted through the liquid inlet / outlet portion 21. Then, the inlet / outlet portion 21 was closed with a rubber stopper. The water temperature was measured continuously for 12 hours starting from the time when the water temperature in the heat insulating container 10 reached 95 ° C. The measurement results are shown in FIG.
As a result of the measurement, the water temperature after 12 hours was 79 ° C. and showed excellent heat retention performance.

  According to this invention, it can utilize as a heat insulation container which heat-retains a liquid, and is applied to the heat insulation container which heat-retains the LLC of the vehicle engine especially. In addition, it can also be used for a heat retaining container such as an electric pot or a cold container such as a liquefied gas.

Longitudinal sectional view of a heat insulating container according to the present invention A perspective view showing a flange member Sectional view showing the flange member Partial enlarged view around the liquid inlet / outlet in FIG. Explanatory drawing which shows the preparation methods of the heat insulating material which concerns on this invention (the 1) Explanatory drawing which shows the preparation methods of the heat insulating material which concerns on this invention (the 2) Explanatory drawing which shows the preparation methods of the heat insulating material which concerns on this invention (the 3) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 1) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 2) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 3) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 4) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 5) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 6) Explanatory drawing which shows the preparation methods of the heat insulation container which concerns on this invention (the 7) The graph which shows the heat retention performance of the heat insulation container which concerns on a present Example

Explanation of symbols

10: Thermal insulation container 20: Inner container 21: Inlet / outlet part 30: Interior material (laminate film)
31: Surface side 32: Orientation switching part 33: Laminate film 34: Hole 35: Hole 36: Periphery 37, 38: Thermal welding part 40: Heat insulation space 41: Heat insulation material (glass wool)
42: Gas adsorbent (getter agent)
50: Exterior material (laminate film)
60: Flange member 61: Inlet / outlet portion through hole 62: Upper end portion 63: Upper flange surface 64: Lower end portion 65: Lower flange surface 70: Ring heater 71: Welding sealing heater (bar heater)
80: Glass mat 81: Binder solution 82: Square core material (mold)
90: Inorganic fiber molded body (heat insulation parts)
91: Hole

Claims (8)

  A heat insulating container that retains and retains a liquid, the inner container having a liquid inflow / outlet portion, a sheet-shaped exterior material that accommodates the inner container, and a heat insulating material and a gas adsorbent between the inner container and the exterior material And a heat-insulating space formed into a decompression space, and the heat insulating material is three-dimensionally molded so as to surround the inner container by combining a plurality of inorganic fiber molded bodies.   The heat insulating container according to claim 1, wherein the inorganic fiber molded body is a flat plate, an L shape, a U shape, a U shape, a concave shape or a convex shape.   The heat insulation container according to claim 1 or 2, wherein the inorganic fiber molded body is formed by orienting glass long fibers in a compressed state in a direction perpendicular to the heat transfer direction, and retained by an inorganic binder.   In order to keep the liquid warm, a resin-made inner container provided with a liquid inflow / outlet part, a sheet-shaped exterior material that accommodates the inner container, and a heat insulating material and a gas adsorbent between the inner container and the exterior material A heat insulating material manufacturing method for a heat insulating container provided with a heat insulating space enclosed with a reduced pressure space, wherein an inorganic fiber mat produced by needle punching an inorganic fiber is placed in an aqueous solution in which an inorganic binder is dispersed. It is formed by impregnating and drying by moisture and then cut to form an inorganic fiber molded body, and a plurality of these inorganic fiber molded bodies are combined to form a heat insulating material surrounding the inner container. The manufacturing method of the heat insulating material for heat insulation containers.   The method for producing a heat insulating material for a heat insulating container according to claim 4, wherein an inorganic fiber mat wound around a square core material is impregnated in an aqueous solution in which an inorganic binder is dispersed.   The method for producing a heat insulating material for a heat insulating container according to claim 4 or 5, wherein the inorganic fiber is a long glass fiber. In order to keep the liquid warm, a resin-made inner container provided with a liquid inflow / outlet part, a sheet-shaped exterior material that accommodates the inner container, and a heat insulating material and a gas adsorbent between the inner container and the exterior material Is a method of manufacturing a heat insulating container provided with a heat insulating space enclosed with a decompression space,
In advance, a process of three-dimensionally molding the inorganic fiber parts constituting the heat insulating material,
Fitting the inorganic fiber parts together to surround the inner container;
A step of accommodating the inner container surrounded by the inorganic fiber parts in the exterior material, and after the gas adsorbent is loaded into the heat insulation space formed by the inner container and the exterior material, the process of sealing the heat insulation space under reduced pressure. A method for producing a heat-insulating container. Immersing the inorganic fiber mat in an aqueous solution containing an inorganic binder;
The method for producing a heat insulating container according to claim 7, further comprising a step of drying the mat made of inorganic fiber containing an aqueous solution in a compressed state.

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