JP2010265932A - Tank and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a tank capable of preventing the thermal deterioration of a resin liner. <P>SOLUTION: The method for manufacturing the tank includes a heat insulating material covering step S11 for covering an outer peripheral surface of the resin liner with a heat insulating material having a thermal conductivity of 0.03 W/m×K or lower, an FRP covering step S12 for covering an outer peripheral surface of the heat insulating material with resin-impregnated fiber containing thermosetting resin and fiber impregnated with the thermosetting resin, and a heat curing step S13 for curing the thermosetting resin by heating. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tank and a manufacturing method thereof.

  For example, a high-pressure natural gas tank or a high-pressure hydrogen tank is used as a fuel gas supply source in a fuel device mounted in a natural gas vehicle and a fuel cell system mounted in a fuel cell vehicle. Such a high-pressure tank includes a liner which is a tank container main body, and a fiber reinforced resin (hereinafter referred to as “FRP”) layer covering the liner. With such a configuration, even if the liner is thinned, the FRP layer maintains the strength that can withstand the high internal pressure of the tank, so the weight of the tank itself can be reduced. The FRP layer is formed, for example, by winding a fiber impregnated with a thermosetting resin around the outer peripheral surface of the liner and thermosetting the thermosetting resin by heating.

  Conventionally, as a high-pressure tank having the above-described configuration, a structure in which an FRP layer and another layer are laminated for various purposes has been proposed. For example, Patent Document 1 is a composite container in which the outer periphery of a metal liner is reinforced with FRP with the intention of adding a device that facilitates use as a recycled resource after use in the manufacturing stage of the composite container, There has been proposed a composite container for a natural gas automobile fuel device, characterized in that an anti-adhesion layer made of a release film is formed on the entire surface or the main part between a metal liner and an FRP layer.

Japanese Patent Laid-Open No. 10-292899

  However, the present inventor has examined the conventional tanks including those described in Patent Document 1 in detail, and found that the liner is thermally deteriorated if it is a resin liner. Accordingly, the present invention has been made in view of the above circumstances, and an object thereof is to provide a tank manufacturing method capable of preventing thermal deterioration of a resin liner and a tank obtained by the manufacturing method.

  As a result of intensive studies to achieve the above object, the present inventor has found that the resin liner is thermally deteriorated due to heat generated by thermosetting of the thermosetting resin when the FRP layer is formed. In other words, since the curing reaction of the thermosetting resin is an exothermic reaction, even if the heating temperature for the thermosetting resin is set considering the heat resistant temperature of the resin liner, the temperature at which the resin liner is exposed is Due to the heat generated when the curable resin is cured, it becomes higher than the set heating temperature. As a result, it has been found that thermal degradation of the resin liner occurs.

  FIG. 6 shows the temperature change of a liner when a polyamide 6 liner is coated with a carbon fiber impregnated with an epoxy resin and heated to cure the epoxy resin in order to manufacture a conventional tank. It is a chart. (A) is a liner temperature, (b) is a plot of the furnace temperature of the curing furnace used for heating. According to FIG. 6, when the epoxy resin is cured while maintaining the furnace temperature in the curing furnace at about 80 ° C., the temperature of the liner gradually increases from room temperature. However, at a certain point in time, the temperature of the liner rises rapidly, reaching a maximum of 174 ° C. When the polyamide 6 liner is heated to 150 ° C. or higher, its elongation at break is drastically reduced, and this temperature rise causes thermal degradation of the liner. Then, as a result of further studies to suppress the above temperature rise of the resin liner, the present inventor has completed the present invention.

  That is, the tank manufacturing method of the present invention includes the first step of covering the outer peripheral surface of the resin liner with a heat insulating material having a thermal conductivity of 0.03 W / m · K or less, the thermosetting resin, and its thermosetting. A second step of covering the outer peripheral surface of the heat insulating material with a resin-impregnated fiber including a fiber impregnated with a thermosetting resin, and a third step of curing the thermosetting resin by heating.

  According to the method for producing a tank of the present invention, a thermosetting in a resin-impregnated fiber is performed with a thermal conductivity of 0.03 W / m · K or less sandwiched between a resin liner and a fiber reinforced resin. The heat-resistant resin is heated. For example, as is clear from the fact that the thermal conductivity of dry air at 25 ° C. and 1 atm is about 0.02 W / m · K, the present invention employs a heat insulating material that is extremely excellent in heat insulating performance. . As a result, even if the resin generates heat when the thermosetting resin is heated, heat transfer to the resin liner is suppressed, so that thermal degradation of the liner can be sufficiently prevented.

  In the tank manufacturing method of the present invention, the heat insulating material may be one or more heat insulating materials selected from the group consisting of urethane foam and phenol foam. Since these heat insulating materials can have a thermal conductivity of 0.03 W / m · K or less, the object of the present invention can be reliably achieved. Further, it is preferable that the heat insulating material has a thickness of 1 mm or less because an increase in the outer diameter of the tank accompanying the provision of the heat insulating material can be suppressed and the space for mounting the tank can be reduced.

  The resin constituting the resin liner is preferably at least one resin selected from the group consisting of polyamide, polyethylene, and polyethylene terephthalate. The thermosetting resin is preferably at least one resin selected from the group consisting of polyimide, epoxy resin, phenol resin and polyvinyl ester. Furthermore, the fibers are preferably one or more fibers selected from the group consisting of glass fibers, carbon fibers, and aramid fibers. The combination of these materials is that the resin constituting the resin liner is polyamide, the thermosetting resin is epoxy resin, the fiber is carbon fiber, and the heat insulating material is urethane foam and phenol foam. A combination that is one or more selected heat insulating materials is particularly preferred.

  The tank of the present invention includes a resin liner, a heat insulating layer that covers the outer peripheral surface of the resin liner, a heat insulating material having a thermal conductivity of 0.03 W / m · K or less, and an outer periphery of the heat insulating layer. A fiber reinforced resin layer including a fiber and a thermosetting resin that covers the surface is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the tank obtained by the manufacturing method of the tank which can prevent the thermal deterioration of resin liner, and its manufacturing method can be provided.

It is process drawing of the manufacturing method of the tank which shows one Embodiment of this invention. It is a figure which shows typically a mode that a resinous liner is coat | covered with a heat insulating material. It is a figure which shows typically a mode that a resin-made liner is coat | covered with a resin impregnation fiber. It is a figure which shows typically a mode that the thermosetting resin of a resin impregnation fiber layer is hardened | cured by heating. It is sectional drawing which shows typically the tank of one Embodiment of this invention. It is a chart which shows the temperature change of the resin liner when the outer peripheral surface of a resin liner is coat | covered and heated with the resin impregnation fiber in order to manufacture the conventional tank.

  Hereinafter, a form for carrying out the present invention (hereinafter simply referred to as “the present embodiment”) will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

  FIG. 1 is a process diagram showing a method of manufacturing a tank according to this embodiment. The tank manufacturing method of the present embodiment includes a heat insulating material coating step S11 for covering the outer peripheral surface of a resin liner with a heat insulating material, an FRP coating step S12 for covering the outer peripheral surface of the heat insulating material with a resin-impregnated fiber, and the resin A thermosetting step S13 for curing the thermosetting resin contained in the impregnated fiber by heating.

  First, the heat insulating material coating step S11 will be described. FIG. 2 is a diagram illustrating a state in which the resin liner 21 is covered with the heat insulating material 22 in the heat insulating material covering step S11. First, prior to the heat insulating material coating step S <b> 11, a structure 24 having a resin liner 21 and bases 23 attached to both ends in the longitudinal direction of the resin liner 21 is prepared. The resin liner 21 has, for example, a cylindrical shape whose both ends are substantially hemispherical. In this specification, the substantially hemispherical portion is referred to as a dome portion, and the cylindrical body portion is referred to as a straight portion. It is represented by 21s.

  The resin constituting the resin liner 21 is not particularly limited as long as it has excellent gas barrier properties and can suppress the permeation of the gas stored in the tank to the outside, and may be a homopolymer or a copolymer. Examples of the homopolymer include polyolefins typified by polyethylene and polypropylene; polystyrenes; polyamides; polyimides; polyurethanes; epoxy resins; polycarbonates; melamine formaldehyde; Examples thereof include acrylic resins represented by methyl acid; polyphenylene sulfide; polyhaloolefins represented by polyvinyl chloride, polyvinylidene chloride and polytetrafluoroethylene; and polyvinyl alcohol. Examples of the copolymer include acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, ethylene-ethyl acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, Examples thereof include a methyl methacrylate-butadiene-styrene copolymer and a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer. These may be used alone or in combination of two or more.

  The resin constituting the resin liner 21 is preferably at least one resin selected from the group consisting of polyamide, polyethylene, and polyethylene terephthalate from the viewpoint of further excellent gas barrier properties. Examples of the polyamide include polyamide 6, polyamide 11, polyamide 12, polyamide 46, polyamide 66, polyamide 610, polyamide 6T, polyamide 6I, polyamide 9T, polyamide M5T, and polyamide 612. Examples of the polyethylene include high-pressure method low-density polyethylene, linear short-chain branched polyethylene, medium- and low-pressure method high-density polyethylene, and metallocene-catalyzed linear short-chain branched polyethylene. From the same viewpoint as described above, the polyethylene is preferably medium-low pressure high-density polyethylene, and the polyamide is preferably polyamide 6.

  Openings are formed at both ends of the resin liner 21, and a base 23 is fitted into the openings. One of the caps 23 is further formed with a through-hole and is fitted with a valve to function as a gas inlet or outlet, while the other is sealed. The base 23 is made of, for example, aluminum or an aluminum alloy, and is manufactured in a predetermined shape by, for example, a die casting method.

  On the other hand, a heat insulating material 22d for covering the dome portion 21d of the resin liner 21 and a heat insulating material 22s for covering the straight portion 21s of the resin liner 21 are prepared. These heat insulating materials 22 d and 22 s form the heat insulating material 22 that finally covers the resin liner 21.

  The heat insulating material 22 is not particularly limited as long as it has a thermal conductivity of 0.03 W / m · K or less, and may be either a fiber heat insulating material or a foam heat insulating material. In these, a foam type heat insulating material is preferable from a viewpoint which can exhibit higher heat insulation. Examples of the fiber-based heat insulating material include inorganic fiber-based heat insulating materials represented by glass wool, and natural fiber-based heat insulating materials represented by cellulose fibers and wool heat insulating materials. Examples of the foam heat insulating material include bead method polystyrene foam, extrusion method polystyrene foam, urethane foam, phenol foam, highly foamed polyethylene foam, and Aisinen foam. Among these, urethane foam and phenol foam are preferable from the viewpoint of desired heat insulation and availability.

  The heat insulating material 22 may be manufactured by a known method, or a commercially available product may be obtained. Moreover, as the heat insulating material 22, a film-like or sheet-like heat insulating material may be used in a single layer, or two or more layers may be laminated and used. When two or more layers are used, the heat insulating materials in the respective layers may be different or the same.

  In the case where the heat insulating material 22 is manufactured by a known method, in order to reduce the thermal conductivity to 0.03 W / m · K or less, a material having a low thermal conductivity is selected as the material of the solid portion constituting the heat insulating material 22. Or increase the proportion of the gas part contained in the heat insulating material 22.

  Moreover, in order to improve the heat resistance of the heat insulating material 22, it is preferable that the solid part of the heat insulating material 22 contains a flame retardant. Examples of such a flame retardant include a bromine compound, a phosphide compound, and inorganic particles (for example, silica and alumina). These are used singly or in combination of two or more. By adding a flame retardant, even if the heat insulating material 22 is heated to, for example, 150 ° C. or higher, the thermal deterioration can be suppressed.

  The thermal conductivity of the heat insulating material 22 is preferably 0.03 W / m · K or less from the viewpoint of achieving the object of the present invention and further downsizing the tank. In the present specification, the thermal conductivity is measured by a laser flash method (JIS R1611-1997) or a hot wire method (probe method).

  The thickness of the heat insulating material 22 is not particularly limited, but is preferably 1 mm or less because further downsizing of the tank can be realized. From the same viewpoint, the thickness of the heat insulating material 22 is more preferably 2.0 mm or less, and further preferably 1.0 mm or less.

From the viewpoint of more reliably and effectively achieving the effects of the present invention, the heat insulating material 22 preferably has a product of thermal conductivity and thickness (thermal conductivity × thickness) of 0.067 m ² · K / W or less. 0.033067 m ² · K / W or less is more preferable.

  Moreover, you may change the thickness of the heat insulating material 22 partially. For example, the degree of heat generation of the thermosetting resin in the resin-impregnated fiber layer 26 described later varies depending on the shape of the base. The heat generation at the portion corresponding to the dome portion 21d of the resin liner 21 is smaller than the heat generation at the portion corresponding to the straight portion 21s. Therefore, it is preferable to make the thickness of the heat insulating material 22d thinner than the thickness of the heat insulating material 22s. Thereby, the thermal deterioration of the resin liner 21 due to the heat generation of the thermosetting resin can be effectively prevented, and at the same time, the tank can be efficiently downsized.

  In the heat insulating material covering step S11, first, the outer peripheral surface of the straight portion 21s of the resin liner 21 is covered with a cylindrical heat insulating material 22s. As shown in FIG. 2A, the heat insulating material 22s may be formed in a cylindrical shape in advance. Or although not shown in figure, after winding a sheet-like or film-like heat insulating material around the whole straight part 21s outer peripheral surface of the resin-made liner 21, the cylindrical heat insulating material 22s is adhere | attached on both ends mutually. May be obtained.

  Next, the outer peripheral surface of the dome portion 21d of the resin liner 21 is covered with a substantially hemispherical heat insulating material 22d (however, a portion corresponding to the base 23 is cut out). As shown in FIG. 2B, the heat insulating material 22d may be formed in a substantially hemispherical shape in advance. Or although it is not illustrated, it is a sheet-like or film-like heat insulating material, Comprising: You may shape | mold in the planar shape which becomes a substantially hemispherical shape by coat | covering the dome part 21d outer peripheral surface. In the latter case, a substantially hemispherical heat insulating material 22d is formed by bonding predetermined end portions of the heat insulating material to each other after covering the outer peripheral surface of the dome portion 21d.

  By using the heat insulating materials 22s and 22d as a film or a sheet, it is easy to wrap around the resin liner 21, and it is possible to minimize the increase in size of the tank accompanying the provision of the heat insulating material. it can.

  Subsequently, as shown in FIG. 2 (c), the edge of the cylindrical heat insulating material 22s and the edge of the substantially hemispherical heat insulating material 22d are bonded to each other with an adhesive tape 25, and a resin liner is formed. The heat insulating material 22 which coat | covered the outer peripheral surface of 21 whole is formed. Note that the edge portions may be bonded to each other using an adhesive tape or a liquid adhesive instead of the adhesive tape 25.

  Next, the FRP coating step S12 will be described. Here, a method for coating a resin liner with resin-impregnated fibers using filament winding molding will be described as an example. FIG. 3 is a diagram showing an outline of a resin-impregnated fiber coating system used in the FRP coating step S12.

  The coating system 30 includes a fiber bundle supply unit 31, a tension measuring device 32, a resin impregnation unit 33, a fiber bundle guide (airo) 35, a structure 24 having a resin liner 21 and a base 23, and a control unit. 37.

  The fiber bundle supply unit 31 includes a plurality (three in FIG. 1) bobbins 34a to 34c around which the fiber bundles f1 to f3 are wound. The fiber bundle supply unit 31 adjusts the tension of the fiber bundles f <b> 1 to f <b> 3 and sends it to the tension measuring device 32.

  The fiber bundles f1 to f3 constitute reinforcing fibers in the FRP obtained in a later step. Examples of the reinforcing fibers include glass fibers, carbon fibers, boron fibers, metal fibers, and resin fibers typified by aramid fibers, polyethylene fibers, and poly (paraphenylenebenzobisoxazole) fibers. Among these, glass fiber, carbon fiber, and aramid fiber are preferable, and carbon fiber is more preferable from the viewpoint of low heat capacity of the material and easy heat transfer to the thermosetting resin and easy availability. These are used singly or in combination of two or more. The reinforcing fiber may be produced by a conventional method, or a commercially available product may be obtained.

  The tension measuring device 32 measures the tension of the fiber bundles f <b> 1 to f <b> 3 and outputs the measurement result to the control unit 37.

  The resin impregnation unit 33 includes a resin tank 33a in which an uncured thermosetting resin (liquid or gel) is stored, and an impregnation roller 33b that guides the fiber bundles f1 to f3 to a predetermined position of the resin tank 33a. 33c and 33d, and the fiber bundles f1 to f3 are impregnated with the resin in the resin tank 33a.

  Examples of the thermosetting resin include an epoxy resin, a modified epoxy resin typified by a vinyl ester resin, a phenol resin, a melamine resin, a urea resin, an unsaturated polyester resin, an alkyd resin, a polyurethane, and a thermosetting polyimide. Among these, epoxy resins, vinyl ester resins, phenol resins, and polyimide resins are preferable, and epoxy resins are more preferable from the viewpoints of adhesive strength with fibers, environmental resistance, heat resistance, and the like. These are used singly or in combination of two or more. The thermosetting resin may be produced by a conventional method, or a commercially available product may be obtained.

  Examples of the epoxy resin include bisphenol A type, bisphenol F type, biphenyl type, glycidyl ester type, and glycidyl amine type. Examples of vinyl ester resins include bis vinyl ester resins and novolac vinyl ester resins. Examples of the phenol resin include novolac type phenol resins and resol type phenol resins. Examples of the polyimide resin include a polyamide type and a polyamic acid type.

  The fiber bundle guide 35 forms the fiber bundle F by bundling the fiber bundles f1 to f3 impregnated with the thermosetting resin into one, and guides the fiber bundle F to the structure 24. The fiber bundle guide 50 can be reciprocated in the longitudinal direction of the structure 24 and the direction perpendicular thereto, and is installed in a rotatable state so that the angle with respect to the structure 24 can be changed.

  The structure 24 is attached to the rotation drive unit 36b via the support unit 36a so as to be rotatable about its axis. The rotational drive unit 36b has a variable speed motor, and the structure 24 is rotationally driven by this motor.

  The pressurizing pump 36 c pressurizes the inside of the structure 24 in order to prevent the structure 24 from being recessed during the formation of the resin-impregnated fiber layer 26.

  The control unit 37 includes a program for controlling the operation of the resin impregnated fiber coating system 30. The control unit 37 controls the entire coating system 30 according to this program, for example, supply of the fiber bundle supply unit 31, rotation of the resin impregnation unit 33, position of the fiber bundle guide 35, rotation of the structure 24, and the like. ing.

  In the FRP coating step S12, first, the structure 24 is attached to the rotation drive unit 36b via the support unit 36a. Next, the fiber bundle guide 35 is disposed at the winding start position. Then, the fiber bundles f1 to f3 fed from the fiber bundle supply unit 31 are guided to the fiber bundle guide 35 through the tension measuring device 32 and the resin impregnation unit 33. At this time, the fiber bundles f <b> 1 to f <b> 3 are impregnated with the resin in the resin impregnation portion 33.

  Next, a fiber bundle F is formed by impregnating the thermosetting resin with the fiber bundle guide 35 and bundling the fiber bundles f1 to f3 into one. The resin-impregnated fiber layer 26 is formed by winding the fiber bundle F around the structure 24. More specifically, the structure 24 is driven to rotate by the motor of the rotation drive unit 36b and the fiber bundle guide 50 is synchronized with the reciprocating motion of the fiber bundle guide 50 to wind the fiber bundle F around the structure 24 in a predetermined pattern. A resin-impregnated fiber layer 26 composed of a plurality of layers was formed. The winding method (pattern) of the fiber bundle F is not particularly limited, and may be, for example, hoop winding, helical winding, or a combination of them.

  Next, the thermosetting step S13 will be described. FIG. 4 is a diagram schematically showing how the thermosetting resin of the resin-impregnated fiber layer 26 is cured by heating. In this step S13, first, in a curing furnace (not shown) for curing the thermosetting resin by heating, the structure 24 covered with the resin-impregnated fiber layer 26 is rotated via the support portion 41. Attach to 42. Next, the heater (not shown) of the curing furnace is operated, and the structure 24 covered with the resin-impregnated fiber layer 26 is rotationally driven by the motor of the rotational drive unit 42. The heating temperature by the heater may be a temperature that is sufficient to cure the thermosetting resin of the resin-impregnated fiber layer 26 and that does not cause thermal degradation of the resin liner 21 and the reinforcing fibers.

  At this time, the temperature of the resin-impregnated fiber layer 26 rises to a temperature higher than the heating temperature due to heat generated by the curing reaction of the thermosetting resin. On the other hand, since the heat insulating material 22 is sandwiched between the resin impregnated fiber layer 26 and the resin liner 21, heat transfer from the resin impregnated fiber layer 26 to the resin liner 21 is inhibited by the heat insulating material 22. As a result, the temperature of the resin liner 21 is equal to or lower than the heating temperature or slightly higher than the heating temperature. Therefore, for example, even if the thermosetting resin is rapidly cured in order to improve the productivity of the tank, the thermal degradation of the resin liner 21 that has conventionally occurred is sufficiently suppressed.

  Thus, the resin-impregnated fiber layer 26 is cured to become the reinforcing fiber resin layer 27, and the tank 50 of this embodiment is obtained. FIG. 5 is a diagram schematically showing a cross section that appears by cutting in a direction perpendicular to the longitudinal direction of the tank 50. The tank 50 includes a resin liner 21, a heat insulating layer 22 made of a heat insulating material that covers the outer peripheral surface of the resin liner 21, and a reinforcing fiber resin layer 27 that covers the outer peripheral surface of the heat insulating layer 22.

  In the tank 50, the reinforcing fiber resin layer 27 is fixed to the heat insulating layer 22 by curing of a thermosetting resin that also functions as an adhesive. On the other hand, the heat insulating layer 22 is not fixed to the resin liner 21. In a conventional tank, when a layer covering a resin liner (for example, a reinforcing fiber resin layer) is bonded to the resin liner, the layer is actually bonded non-uniformly between them. For this reason, if the resin liner repeatedly expands and contracts by replenishing the gas in the tank or heating and cooling the tank, it will be excessive in areas where the adhesive force is strong (for example, the boundary between the straight section and the dome section). Stress is applied, and the resin liner is liable to crack and deform. However, in the tank 50 of the present embodiment, as described above, since the heat insulating layer 22 is not fixed to the resin liner 21, stress is hardly applied to the resin liner 21. As a result, even if the resin liner 21 repeats expansion and contraction, the cracking and deformation can be sufficiently prevented.

  In the tank 50 and its manufacturing method of the present embodiment, the resin constituting the resin liner 21 is polyamide, the thermosetting resin in the resin-impregnated fiber layer 26 (reinforced fiber resin layer 27) is an epoxy resin, and the fibers are It is preferably carbon fiber and the heat insulating material 22 is at least one heat insulating material selected from the group consisting of urethane foam and phenol foam. From the viewpoint of availability, cost, and mechanical strength after curing, the epoxy resin is excellent in toughness and easily generates heat. From the viewpoint of efficiently assisting the thermosetting of the epoxy resin, the polyamide is From the viewpoint of excellent gas barrier properties, each is preferred. One or more heat insulating materials selected from the group consisting of urethane foam and phenol foam can sufficiently transfer heat to the liner 21 made of polyamide even when the epoxy resin in the resin-impregnated fiber layer 26 generates heat during curing. It is possible to prevent thermal degradation of the liner 21 (for example, decrease in elongation at break).

  The tank 50 of this embodiment is useful as a tank for storing high-pressure gas therein. Examples of such a high-pressure tank include a hydrogen tank that can be used in a fuel cell system and the like, and a high-pressure vessel used in a CNG vehicle that uses CNG (compressed natural gas) as fuel.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said this embodiment. The present invention can be variously modified without departing from the gist thereof.

  For example, in the present embodiment, in the heat insulating material covering step S11, a sheet-like or film-like heat insulating material is used. Instead, when a foamed heat insulating material such as urethane foam is used as the heat insulating material, a liquid resin is used. You may form a heat insulating material by spraying (composition) on the whole outer peripheral surface of the resin liner 21, and making it foam.

  DESCRIPTION OF SYMBOLS 21 ... Resin liner, 22 ... Heat insulating material, 23 ... Base, 24 ... Structure, 25 ... Adhesive tape, 26 ... Resin impregnated fiber layer, 27 ... Reinforcement fiber resin layer, 30 ... Coating system, 50 ... Tank, S11 ... Insulating material coating step, S12 ... coating step, S13 ... thermosetting step.

Claims (8)

A first step of covering the outer peripheral surface of the resin liner with a heat insulating material having a thermal conductivity of 0.03 W / m · K or less;
A second step of covering the outer peripheral surface of the heat insulating material with a resin-impregnated fiber including a thermosetting resin and a fiber impregnated with the thermosetting resin;
A third step of curing the thermosetting resin by heating;
A method for manufacturing a tank including   The said heat insulating material is a manufacturing method of the tank of Claim 1 which is 1 or more types of heat insulating materials chosen from the group which consists of urethane foam and phenol foam.   The said heat insulating material is a manufacturing method of the tank of Claim 1 or 2 which has thickness of 1 mm or less.   The method for producing a tank according to any one of claims 1 to 3, wherein the resin constituting the resin liner is at least one resin selected from the group consisting of polyamide, polyethylene, and polyethylene terephthalate.   The said thermosetting resin is a manufacturing method of the tank as described in any one of Claims 1-4 which is 1 or more types of resin chosen from the group which consists of a polyimide, an epoxy resin, a phenol resin, and polyvinyl ester.   The said fiber is a manufacturing method of the tank as described in any one of Claims 1-5 which is 1 or more types of fibers chosen from the group which consists of glass fiber, carbon fiber, and an aramid fiber.   The method for producing a tank according to claim 2, wherein the resin constituting the resin liner is polyamide, the thermosetting resin is an epoxy resin, and the fibers are carbon fibers. A resin liner,
A heat insulating layer that covers the outer peripheral surface of the resin liner and includes a heat insulating material having a thermal conductivity of 0.03 W / m · K or less;
A fiber reinforced resin layer comprising a fiber and a thermosetting resin that covers the outer peripheral surface of the heat insulating layer;
With tank.

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