Hose for delivering liquefied natural gas and preparation method thereof

A technology for liquefied natural gas and hoses, applied in the direction of hoses, pipes, mechanical equipment, etc., can solve problems such as potential safety hazards, and achieve good wear resistance and excellent bonding performance

Inactive Publication Date: 2015-12-16

邵素英

14 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is to overcome the defects of the existing corrosion-resistant rubber tubes, using low-density polyethylene (LLDPE), ultra-high molecular weight polyethylene (UHMWPE) and polymer cross-linked polyethylene as the main raw materials, scientifically compounding and After vulcanization of the rubber tube, the lining film is prepared from chemical substances such as polyimide, tetraethylpentamine, α-sulfo fatty acid alkyl ester salt, epoxy resin, SBR latex, rosin, etc., which have excellent bonding properties. Corona treat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Abstract

The invention discloses a hose for delivering liquefied natural gas and a preparation method thereof. The low-density polyethylene, ultra-high molecular weight polyethylene and high-polymer crosslinked polyethylene used as raw materials are scientifically compounded and vulcanized with a rubber tube to prepare a liner film with chemical substances with favorable bonding properties; and the liner film bonding surface and the rubber tube bonding surface are subjected to corona treatment, and radiation-resistant fiberglass-reinforced plastic reinforced fibers are compounded on the surface layer, so that the rubber tube surface layer has excellent radiation resistance, thereby solving the potential safety hazard of the transmission pipeline caused by ionizing radiation, and finally preparing the hose capable of delivering liquefied natural gas, of which the liner film has high bonding firmness and high radiation resistance. The absorptivity for X rays, gamma rays and various neutrons in nuclear radiation can be up to 97.5-99.5%, and the adhesive force between the liner film and rubber layer (N/25mm) is up to 160-180.

Application Domain

Flexible pipes

Technology Topic

Liquefied natural gasIonizing radiation +17

Examples

Experimental program(8)

Example Embodiment

[0060] Example 1

[0061] A hose for transporting liquefied natural gas, comprising a rubber tube body, which includes an inner layer, an intermediate layer and a surface layer in order from the inside to the outside;

[0062] The inner layer is formed by bonding an EPDM rubber layer and an inner lining film through vulcanization;

[0063] The color of the EPDM rubber is milky white;

[0064] The lining film is mainly prepared from the following parts by weight: 30 parts of LLDPE, 25 parts of polyvinyl alcohol, 10 parts of UHMWPE, 5 parts of polymer cross-linked polyethylene, 9 parts of polyimide, 7 parts of tetraethylpentamine , 6 parts of α-sulfo fatty acid alkyl ester salt, 6 parts of epoxy resin, 5 parts of SBR latex, 4 parts of rosin;

[0065] The lining film adopts a conventional method to extrude the raw materials and then blow molding and stretching into a film, and the thickness of the lining film is 0.42 mm.

[0066] The intermediate layer is formed by vulcanizing and bonding EPDM rubber, EPDM cord, polypropylene reinforced composite material, flame retardant, and brass-plated steel wire;

[0067] The intermediate layer contains 15% of its mass of polypropylene reinforced composite material;

[0068] The preparation method of the polypropylene reinforced composite material includes the following steps: laminating the jute weft-knitted biaxial knitted fabric and polypropylene staple fibers at intervals, and each layer of jute fabric is covered with a layer of polypropylene staple fibers on both sides; The machine is heated to 65°C, the jute fabric and polypropylene staple fiber layered above are placed on the hot press, the temperature is increased to 94°C, the pressure is increased to 10MPa, the pressure is increased to 147°C, and the temperature is increased to 185°C after 6min. After 12 minutes of heat preservation and pressure preservation, the polypropylene reinforced composite material can be obtained by natural cooling to room temperature;

[0069] The number of layers of the jute weft-knitted biaxial knitted fabric and polypropylene staple fiber is 9 layers, which means that the total number of layers of the jute weft-knitted biaxial knitted fabric and polypropylene staple fiber is 9 layers;

[0070] The mass ratio of the jute weft-knitted biaxial knitted fabric to the polypropylene staple fiber is 1:1.25.

[0071] The surface layer is made of vulcanized bonding of EPDM rubber and EPDM cord, antistatic agent, and fiberglass reinforced fiber;

[0072] The color of the EPDM rubber is green;

[0073] The surface layer contains 11% by mass of glass fiber reinforced plastic fiber;

[0074] The fiberglass reinforced fiber is mainly prepared from raw materials of the following weight components: 73 parts of fiberglass fiber filaments, 18 parts of anti-neutron fiber filaments, 13 parts of anti-X and γ-ray fiber filaments, 12 parts of lead powder, and 8 parts of boron carbide powder;

[0075] The preparation method of the FRP reinforced fiber includes the following steps:

[0076] 1) Use glass fiber reinforced plastic fiber yarn as warp, anti-neutron fiber yarn and anti-X and γ-ray fiber yarn as weft yarn to make a flat fabric;

[0077] 2) Mix the unsaturated polyester resin, polyethylene glycol and toluene uniformly according to the mass ratio of 100:8:2:22 to make a resin solution, then add lead powder and boron carbide powder to it, and stir to obtain a lead-boron resin Solution

[0078] 3) Immerse the flat fabric prepared in step 1) in the lead-boron resin solution prepared in step 2) for 60 minutes, and carry out high-voltage pulse electric field treatment under the conditions of electric field strength 30kV/cm, pulse time 450μs, and pulse frequency 250Hz; then Fiberglass reinforced fiber can be obtained after drying;

[0079] The drying is a three-stage type, that is, the temperature of the inlet section is kept at 100°C for 30 minutes, the drying section is kept at 135°C for 40 minutes, and the outlet section is kept at 85°C for 25 minutes.

[0080] Preparation.

[0081] The inner layer, middle layer and surface layer of the hose are all bonded by conventional vulcanization;

[0082] Among them, for the inner layer of the rubber tube, in order to enhance the adhesion between the inner lining film and the rubber layer, the bonding surfaces of the inner lining film and the rubber layer are respectively corona treated, and then vulcanized and bonded: the vulcanization temperature is 155°C, Curing time 90min;

[0083] The corona treatment process of the bonding surface of the lining film is: power 12kW, frequency 21KHz; corona intensity: 45mN/m;

[0084] The corona treatment process of the rubber layer bonding surface is: power 14kW, frequency 23KHz; corona strength: 47mN/m;

[0085] The hose prepared by the above method can absorb up to 99.5% of X, γ-rays and various neutrons in nuclear radiation, and the adhesive force (N/25mm) of the inner lining film and the rubber layer can reach 180.

Example Embodiment

[0086] Example 2

[0087] A hose for transporting liquefied natural gas, comprising a rubber tube body, which includes an inner layer, an intermediate layer and a surface layer in order from the inside to the outside;

[0088] The inner layer is formed by bonding an EPDM rubber layer and an inner lining film through vulcanization;

[0089] The color of the EPDM rubber is milky white;

[0090] The lining film is mainly prepared from the following parts by weight: 20 parts of LLDPE, 20 parts of polyvinyl alcohol, 5 parts of UHMWPE, 3 parts of polymer cross-linked polyethylene, 8 parts of polyimide, 5 parts of tetraethylpentamine , 5 parts of α-sulfo fatty acid alkyl ester salt, 5 parts of epoxy resin, 4 parts of SBR latex, 3 parts of rosin;

[0091] The lining film adopts conventional methods to extrude the raw materials and then blow molding and stretching into a film, and the thickness of the lining film is 0.35 mm.

[0092] The intermediate layer is made of vulcanized bonding of EPDM rubber and EPDM cord, polypropylene reinforced composite material, flame retardant, and brass-plated steel wire;

[0093] The intermediate layer contains 10% of its mass of polypropylene reinforced composite material;

[0094] The preparation method of the polypropylene reinforced composite material includes the following steps: laminating the jute weft-knitted biaxial knitted fabric and polypropylene staple fibers at intervals, and each layer of jute fabric is covered with a layer of polypropylene staple fibers on both sides; The machine is heated to 65°C, the jute fabric and polypropylene staple fiber layered above are placed on the hot press, the temperature is increased to 92°C, the pressure is increased to 8MPa, the pressure is increased to 145°C, and the temperature is increased to 180°C after 5 min. After 10 minutes of heat preservation and pressure preservation, the polypropylene reinforced composite material can be obtained by natural cooling to room temperature;

[0095] The number of layers of the jute weft-knitted biaxial knitted fabric and polypropylene staple fiber is 7 layers, which means that the total number of layers of the jute weft-knitted biaxial knitted fabric and polypropylene staple fiber is 7 layers;

[0096] The mass ratio of the jute weft-knitted biaxial knitted fabric to the polypropylene staple fiber is 1:1.2.

[0097] The surface layer is made of vulcanized bonding of EPDM rubber and EPDM cord, antistatic agent, and fiberglass reinforced fiber;

[0098] The color of the EPDM rubber is red;

[0099] The surface layer contains 10% of its mass of fiberglass reinforced fiber;

[0100] The fiberglass reinforced fiber is mainly prepared from raw materials of the following weight components: 70 parts of fiberglass fiber yarn, 16 parts of anti-neutron fiber yarn, 12 parts of anti-X and γ-ray fiber yarn, 10 parts of lead powder, 6 parts of boron carbide powder ;

[0101] The preparation method of the FRP reinforced fiber includes the following steps:

[0102] 1) Use glass fiber reinforced plastic fiber yarn as warp, anti-neutron fiber yarn and anti-X and γ-ray fiber yarn as weft yarn to make a flat fabric;

[0103] 2) Mix the unsaturated polyester resin, aluminum hydroxide, polyethylene glycol and xylene at a mass ratio of 100:7:1:20 to make a resin solution, then add lead powder and boron carbide powder to it, and stir evenly Obtain the lead-boron resin solution;

[0104] 3) Immerse the flat fabric prepared in step 1) in the lead-boron resin solution prepared in step 2) for 50 minutes, and perform high-voltage pulse electric field treatment under the conditions of electric field strength 20kV/cm, pulse time 400μs, and pulse frequency 200Hz; then Fiberglass reinforced fiber can be obtained after drying;

[0105] The drying is a three-stage type, that is, the temperature of the inlet section is kept at 90°C for 40 minutes, the drying section is kept at 120°C for 50 minutes, and the outlet section is kept at 70°C for 30 minutes.

[0106] Preparation.

[0107] The inner layer, middle layer and surface layer of the hose are all bonded by conventional vulcanization;

[0108] Among them, for the inner layer of the rubber tube, in order to enhance the adhesion between the inner lining film and the rubber layer, the bonding surfaces of the inner lining film and the rubber layer are respectively corona treated, and then vulcanized and bonded: the vulcanization temperature is 145°C, Curing time 150min;

[0109] The corona treatment process of the bonding surface of the lining film is: power 10kW, frequency 19KHz; corona intensity: 43mN/m;

[0110] The corona treatment process of the bonding surface of the rubber layer is: power 12kW, frequency 22KHz; corona strength: 45mN/m;

[0111] The hose prepared by the above method has an absorption rate of up to 99% for X, gamma rays and various neutrons in nuclear radiation, and the adhesive force (N/25mm) of the inner lining film and the rubber layer reaches 175.

Example Embodiment

[0112] Example 3

[0113] A hose for transporting liquefied natural gas, comprising a rubber tube body, which includes an inner layer, an intermediate layer and a surface layer in order from the inside to the outside;

[0114] The inner layer is formed by bonding an EPDM rubber layer and an inner lining film through vulcanization;

[0115] The color of the EPDM rubber is milky white;

[0116] The lining film is mainly prepared from the following raw materials in parts by weight: 40 parts of LLDPE, 30 parts of polyvinyl alcohol, 13 parts of UHMWPE, 8 parts of polymer cross-linked polyethylene, 10 parts of polyimide, 8 parts of tetraethylpentamine , 7 parts of α-sulfo fatty acid alkyl ester salt, 7 parts of epoxy resin, 6 parts of SBR latex, 5 parts of rosin;

[0117] The lining film adopts a conventional method to extrude the raw materials and then blow molding and stretching into a film, and the thickness of the lining film is 0.5 mm.

[0118] The intermediate layer is made of vulcanized bonding of EPDM rubber and EPDM cord, polypropylene reinforced composite material, flame retardant, and brass-plated steel wire;

[0119] The intermediate layer contains 18% of its mass of polypropylene reinforced composite material;

[0120] The preparation method of the polypropylene reinforced composite material includes the following steps: laminating the jute weft-knitted biaxial knitted fabric and polypropylene staple fibers at intervals, and each layer of jute fabric is covered with a layer of polypropylene staple fibers on both sides; The machine is heated to 65°C, the jute fabric and polypropylene staple fiber layered above are placed on the hot press, the temperature is increased to 96°C, the pressure is increased to 12MPa, the pressure is increased to 148°C, and the temperature is increased to 190°C after 8 minutes. After 15 minutes of heat preservation and pressure preservation, the polypropylene reinforced composite material can be obtained by natural cooling to room temperature;

[0121] The number of layers of the jute weft-knitted biaxial knitted fabric and polypropylene staple fiber is 11, which means that the total number of layers of the jute weft-knitted biaxial knitted fabric and polypropylene staple fiber is 11 layers;

[0122] The mass ratio of the jute weft-knitted biaxial knitted fabric to the polypropylene staple fiber is 1:2.

[0123] The surface layer is made of vulcanized bonding of EPDM rubber and EPDM cord, antistatic agent, and fiberglass reinforced fiber;

[0124] The color of the EPDM rubber is yellow;

[0125] The surface layer contains 13% of its mass of glass fiber reinforced plastic fiber;

[0126] The fiberglass reinforced fiber is mainly prepared from raw materials of the following weight components: 75 parts of glass fiber reinforced plastic filaments, 20 parts of anti-neutron filaments, 15 parts of anti-X and γ-ray filaments, 15 parts of lead powder, and 10 parts of boron carbide powder. ;

[0127] The preparation method of the FRP reinforced fiber includes the following steps:

[0128] 1) Use glass fiber reinforced plastic fiber yarn as warp, anti-neutron fiber yarn and anti-X and γ-ray fiber yarn as weft yarn to make a flat fabric;

[0129] 2) Mix the unsaturated polyester resin, aluminum hydroxide, polyethylene glycol and toluene uniformly according to the mass ratio of 100:9:3:25 to make a resin solution, then add lead powder and boron carbide powder to it, and stir it evenly. Lead-boron resin solution;

[0130] 3) Immerse the flat fabric prepared in step 1) in the lead-boron resin solution prepared in step 2) for 70 minutes, and perform high-voltage pulse electric field treatment under the conditions of electric field strength 40kV/cm, pulse time 500μs, and pulse frequency 300Hz; then Fiberglass reinforced fiber can be obtained after drying;

[0131] The drying is a three-stage type, that is, the temperature of the inlet section is maintained at 110°C for 20 minutes, the drying section is maintained at 150°C for 30 minutes, and the outlet section is maintained at 100°C for 20 minutes.

[0132] Preparation.

[0133] The inner layer, middle layer and surface layer of the hose are all bonded by conventional vulcanization;

[0134] Among them, for the inner layer of the rubber tube, in order to enhance the adhesion between the inner lining film and the rubber layer, the bonding surfaces of the inner lining film and the rubber layer are respectively corona treated, and then vulcanized and bonded: the vulcanization temperature is preferably 165 ℃, curing time is preferably 35min;

[0135] The corona treatment process of the bonding surface of the lining film is: power 15kW, frequency 24KHz; corona intensity: 48mN/m;

[0136] The corona treatment process of the adhesive surface of the rubber layer is: power 16kW, frequency 25KHz; corona intensity: 49mN/m;

[0137] The hose prepared by the above method can absorb up to 98.5% of X, γ-rays and various neutrons in nuclear radiation, and the adhesive force (N/25mm) of the inner lining film and the rubber layer can reach 170.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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PUM

Property	Measurement	Unit
Thickness	0.42	mm
Thickness	0.35	mm
Thickness	0.5	mm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Good bonding performance
Good wear resistance

Method of producing lithium iron phosphate with high compacted density and excellent adhesive property

InactiveCN101152961AGood winding performanceGood bonding performanceCell electrodesPhosphorus compoundsNitrogen atmosphereOxide

Owner:天津科斯特汽车技术有限责任公司

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ActiveCN107369835AGood electrical conductivityGood bonding performanceSecondary cellsNon-aqueous electrolyte accumulator electrodesPolyvinylidene fluorideSodium carboxymethylcellulose

Owner:HUAWEI TECH CO LTD

Hose for delivering liquefied natural gas and preparation method thereof

A technology for liquefied natural gas and hoses, applied in the direction of hoses, pipes, mechanical equipment, etc., can solve problems such as potential safety hazards, and achieve good wear resistance and excellent bonding performance

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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