Abstract: A tank includes a liner, a neck that has a communicating orifice, a metal cylindrical member that is inserted into a lower end portion of the communicating orifice, and a valve that is inserted into the communicating orifice, wherein a lower end portion of the valve is inserted into the metal cylindrical member. The liner includes a wrap-around portion that wraps around to inside of the communicating orifice, and to contact with an outer circumferential face of the metal cylindrical member. A first O-ring is disposed in a circumferential direction between an inner circumferential face of the wrap-around portion and the outer circumferential face of the metal cylindrical member. A second O-ring is disposed in the circumferential direction between an inner circumferential face of the metal cylindrical member and an outer circumferential face of the lower end portion of the valve.

Abstract: A high-pressure tank comprises a liner, a strengthening layer including a first helical layer and a first hoop layer each including a carbon fiber, and a protective layer including a second helical layer and a second hoop layer each including a glass fiber, in this order. The high-pressure tank is provided with a stress-generating portion, a reinforcement layer includes a first area ? overlapping the stress-generating portion in a stacking direction and a second area ? that is an area except for the first area, and a one-round portion including a final crossing portion at an end of winding of the glass fiber constituting the second hoop layer overlaps the second area in the stacking direction.

Abstract: A technology that achieves improvement of the durability of a high-pressure tank is provided. A high-pressure tank 1 includes: a liner 2 having a hollow liner body 3 having an opening 30 in an end portion in an axial direction, and a tubular insert ring 4 harder than the liner body 3 and integrated with the liner body 3 to surround the opening 30; a metal cap 5 inserted into the opening 30; a sealing member 6 sealing between the insert ring 4 and the metal cap 5; and a reinforcing portion 7 covering an outer side of the liner 2, and the insert ring 4 extends to a front side in the axial direction with respect to the liner body 3 and is mounted on the metal cap 5.

Abstract: A high-pressure tank includes: a liner including a body portion having a tubular shape and side end portions each having a dome shape, the side end portions being provided on opposite sides of the body portion; and a reinforcement layer made of fiber reinforced resin covering an outer surface of the liner. The reinforcement layer includes a tubular member covering the body portion and dome members joined to opposite sides of the tubular member so as to cover the side end portions. The liner includes a first resin layer defining a storage space for storing gas and a second resin layer provided between the first resin layer and at least the tubular member. An elastic modulus of a second resin constituting the second resin layer is lower than an elastic modulus of a first resin constituting the first resin layer.

Abstract: A high-pressure tank comprising: a resin liner for a high-pressure tank including at least one opening portion; an aluminum mouth portion attached to the opening portion; and a reinforcement layer formed on an outer surface of the liner, wherein an aluminum oxide coating is formed on a surface of the aluminum mouth portion, the aluminum oxide coating includes a porous surface layer in which columns with an average height of 10 to 100 nm are arranged in a dispersed state, an average value of a percentages of the protruding portion area of the columns in randomly sampled 400 nm square visual fields of the porous surface layer is 5.0 to 26.0%, and an average value of the numbers of the columns in randomly sampled 400 nm square visual fields of the porous surface layer is 500 to 2000.

Abstract: A method for manufacturing a high-pressure tank including a liner that stores gas and a reinforcing layer made of a fiber-reinforced resin and covering an outer surface of the liner includes: a first step of forming a cylinder member made of the fiber-reinforced resin; a second step of forming two dome members made of the fiber-reinforced resin; and a third step of forming a reinforcing body that is the reinforcing layer by joining both end portions of the cylinder member and end portions of the two dome members, respectively. The first step includes forming the cylinder member by winding a release material around a mandrel and winding the fiber-reinforced resin on the release material.

Abstract: A high-pressure tank comprises a liner, a strengthening layer including a first helical layer and a first hoop layer each including a carbon fiber, and a protective layer including a second helical layer and a second hoop layer each including a glass fiber, in this order. The high-pressure tank is provided with a stress-generating portion, a reinforcement layer includes a first area ? overlapping the stress-generating portion in a stacking direction and a second area ? that is an area except for the first area, and a one-round portion including a final crossing portion at an end of winding of the glass fiber constituting the second hoop layer overlaps the second area in the stacking direction.

Abstract: A high-pressure tank comprises a liner, a strengthening layer including a first helical layer and a first hoop layer each including a carbon fiber, and a protective layer including a second helical layer and a second hoop layer each including a glass fiber, in this order. The high-pressure tank is provided with a stress-generating portion, a reinforcement layer includes a first area ? overlapping the stress-generating portion in a stacking direction and a second area ? that is an area except for the first area, and a one-round portion including a final crossing portion at an end of winding of the glass fiber constituting the second hoop layer overlaps the second area in the stacking direction.

Abstract: A liner of a high-pressure tank is made of a material having a shrinkage amount that is calculated by an equation below being 0 or less, the equation being shrinkage amount=?1.533538e?03*x1?3.82355406*x2?7.81992308*x3+1.89342646e?01*x4?7.84558163e?03*x5+1.15956871e?03*x1x2+6.29564353e?04*x1x3?9.34550213e?06*x1x4?6.59253799e?04*x1x5?1.52692282e+00*x2{circumflex over (?)}2+1.67290964e+00*x2x3?1.85202252e?02*x2x4?1.79615713e+00*x2x5+2.37163664e+00*x3{circumflex over (?)}2?1.17467786e?02*x3x4?9.04442817e?01*x3x5?1.86321584e?03*x4{circumflex over (?)}2+6.62631756e?03*x4x5+1.27572698e*x5{circumflex over (?)}2.

Abstract: A high-pressure tank includes: a liner including a body portion having a tubular shape and side end portions each having a dome shape, the side end portions being provided on opposite sides of the body portion; and a reinforcement layer made of fiber reinforced resin covering an outer surface of the liner. The reinforcement layer includes a tubular member covering the body portion and dome members joined to opposite sides of the tubular member so as to cover the side end portions. The liner includes a first resin layer defining a storage space for storing gas and a second resin layer provided between the first resin layer and at least the tubular member. An elastic modulus of a second resin constituting the second resin layer is lower than an elastic modulus of a first resin constituting the first resin layer.

Abstract: In a manufacturing method of a high-pressure tank, a tubular member and dome members are prepared. The tubular member and the dome members are a plurality of divided bodies having a shape in which a reinforcement layer is divided and made of fiber reinforced resin so as to include contact surfaces that are in contact with an outer surface of a liner. Then, the contact surfaces are covered by resin layers constituting the liner. Next, the reinforcement layer and the liner are formed by joining the tubular member and the dome members to each other and joining the resin layers to each other.

Abstract: A manufacturing method of a high pressure tank includes at least : shrinking a liner by cooling the liner, inserting the liner into a cylindrical member to cover a body of the liner in a shrunk state by the cylindrical member, expanding the liner in the shrunk state to fit the cylindrical member to the body by raising the temperature of the liner inserted into the cylindrical member, joining circumferential edge portions of dome members to circumferential edge portions of the cylindrical member that is fit to the body, to cover end portions by the dome members, and form a first reinforcing layer.

Abstract: A method for manufacturing a high-pressure tank including a liner that stores gas and a reinforcing layer made of a fiber-reinforced resin and covering an outer surface of the liner includes: a first step of forming a cylinder member made of the fiber-reinforced resin; a second step of forming two dome members made of the fiber-reinforced resin; and a third step of forming a reinforcing body that is the reinforcing layer by joining both end portions of the cylinder member and end portions of the two dome members, respectively. The first step includes forming the cylinder member by winding a release material around a mandrel and winding the fiber-reinforced resin on the release material.

Abstract: A high-pressure tank includes: a liner; an epoxy resin; a fiber; and a fiber-reinforced epoxy resin layer formed on an outer side of the liner. The epoxy resin has a contact angle on polytetrafluoroethylene ((C2F4)n) of 70° or less in an uncured state.

Abstract: A high-pressure tank comprises a liner, a strengthening layer including a first helical layer and a first hoop layer each including a carbon fiber, and a protective layer including a second helical layer and a second hoop layer each including a glass fiber, in this order. The high-pressure tank is provided with a stress-generating portion, a reinforcement layer includes a first area ? overlapping the stress-generating portion in a stacking direction and a second area ? that is an area except for the first area, and a one-round portion including a final crossing portion at an end of winding of the glass fiber constituting the second hoop layer overlaps the second area in the stacking direction.

Abstract: A high-pressure tank includes: a liner; an epoxy resin; a fiber; and a fiber-reinforced epoxy resin layer formed on an outer side of the liner. The epoxy resin has a contact angle on polytetrafluoroethylene ((C2F4)n) of 70° or less in an uncured state.

Abstract: A high pressure tank includes a liner, a reinforcing layer which includes a first thermosetting resin and fibers and is formed on the liner, and a protective layer which includes a second thermosetting resin having a lower gelling temperature than the a gelling temperature of first thermosetting resin and is formed on the reinforcing layer.

Abstract: The high pressure tank comprises a tank main body including a liner made of a resin and a mouthpiece made of a non-resin material and mounted to an open end of the liner; and a reinforcement layer provided to cover the entire tank main body and have pressure resistance. The liner includes a first contact surface arranged approximately perpendicular to a central axis of the liner to come into contact with the mouthpiece. The mouthpiece includes a second contact surface arranged to come into contact with the first contact surface of the liner. One of the first contact surface and the second contact surface includes projections, and the other includes recesses in which the projections being fitted. The second contact surface is formed in an approximately circular shape.

Abstract: A mouthpiece structure for a pressure vessel includes a liner constituting a vessel body and a cylindrical part, a cylindrical mouthpiece mounted closely to an inner periphery of the cylindrical part, a housing part having a housing recess formed by recessing at least one of the inner periphery of cylindrical part and an outer periphery of mouthpiece, a sealing member housed in the housing recess while adhering closely to the inner periphery of cylindrical part and the outer periphery of mouthpiece, the sealing member defining a sealed space facing an interface between the inner periphery of the cylindrical part and the outer periphery of the mouthpiece in the housing recess, and a retainer located opposite the sealed space with the sealing member being interposed between them and preventing the sealing member from being displaced in a direction such that the sealing member increases a capacity of the sealed space.

Abstract: The high pressure tank comprises a tank main body including a liner made of a resin and a mouthpiece made of a non-resin material and mounted to an open end of the liner; and a reinforcement layer provided to cover the entire tank main body and have pressure resistance. The liner includes a first contact surface arranged approximately perpendicular to a central axis of the liner to come into contact with the mouthpiece. The mouthpiece includes a second contact surface arranged to come into contact with the first contact surface of the liner. One of the first contact surface and the second contact surface includes projections, and the other includes recesses in which the projections being fitted. The second contact surface is formed in an approximately circular shape.