CN210362814U - Fuel pipe - Google Patents
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- CN210362814U CN210362814U CN201822214148.1U CN201822214148U CN210362814U CN 210362814 U CN210362814 U CN 210362814U CN 201822214148 U CN201822214148 U CN 201822214148U CN 210362814 U CN210362814 U CN 210362814U
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Abstract
The utility model provides a fuel pipe, its characterized in that has: a conductive layer, a fuel barrier layer containing a polymer having a chlorotrifluoroethylene unit disposed outside the conductive layer, an outermost layer disposed outside the fuel barrier layer, a first adhesive layer disposed between the conductive layer and the fuel barrier layer, and a second adhesive layer disposed between the fuel barrier layer and the outermost layer; the conductive layer is provided with a rubber part and a conductive filler part dispersed in the rubber part, and the conductive filler part is 1-100 parts by mass relative to 100 parts by mass of the rubber part. According to the present invention, a fuel pipe which can suppress accumulation of static electricity and has excellent low fuel permeability can be provided.
Description
Technical Field
The utility model relates to a fuel pipe.
Background
For the purpose of suppressing the diffusion of fuel from the tube, a fuel hose for an automobile provided with a layer composed of a fluororesin has been proposed. For example, japanese patent application laid-open No. 2004-90405 proposes a fuel system hose for an automobile, comprising an annular inner layer through which fuel flows, and a fuel low-permeation layer on the outer periphery of the inner layer, wherein the inner layer and the fuel low-permeation layer are laminated in a state in which they are in contact with each other at an interface, the inner layer is composed of a fluororesin having a functional group, and the fuel low-permeation layer is composed of a polyester resin having a naphthalene ring.
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
The utility model aims at providing a can restrain the accumulation of static, fuel pipe that the fuel is low to pass through the sex excellence.
Means for solving the problems
The utility model discloses a mode 1's fuel pipe's characterized in that has: a conductive layer, a fuel barrier layer containing a polymer having a chlorotrifluoroethylene unit disposed outside the conductive layer, an outermost layer disposed outside the fuel barrier layer, a first adhesive layer disposed between the conductive layer and the fuel barrier layer, and a second adhesive layer disposed between the fuel barrier layer and the outermost layer;
the conductive layer includes a rubber portion and a conductive filler portion dispersed in the rubber portion, and the conductive filler portion is 1 to 100 parts by mass with respect to 100 parts by mass of the rubber portion.
The fuel cartridge of claim 2 of the present invention is characterized in that, in the 1 st aspect,
the conductive filler part is 10 to 50 parts by mass with respect to 100 parts by mass of the rubber part.
The fuel cartridge of claim 3 is characterized in that, in the cartridge of claim 1,
the thickness of the fuel barrier layer is 0.01-0.5 mm.
The fuel cartridge of claim 4 is characterized in that, in the cartridge of claim 1,
the thickness of the fuel barrier layer is 1-30% of the thickness of the fuel pipe.
The fuel cartridge of claim 5 is characterized in that, in the cartridge of claim 1,
the conducting layer is a layer containing fluororubber, and the thickness of the conducting layer is 0.1-3 mm.
The fuel cartridge of claim 6 is characterized in that, in the 1 st aspect,
the conductive layer is a layer of blended rubber containing polyvinyl chloride and acrylonitrile-butadiene rubber or hydride of acrylonitrile-butadiene rubber, and the thickness of the conductive layer is 0.1-3 mm.
The fuel cartridge of claim 7 is characterized in that, in the 1 st aspect,
the outermost layer is a layer containing non-fluororubber, and the thickness is 0.1-3 mm.
The fuel cartridge of claim 8 is characterized in that, in the 1 st aspect,
the first bonding layer is a non-fluorine rubber-containing layer, and the thickness of the first bonding layer is 0.1-2 mm.
The fuel cartridge of claim 9 of the present invention is characterized in that, in the 1 st aspect,
the second adhesive layer is a layer containing non-fluorine rubber, and the thickness of the second adhesive layer is 0.1-2 mm.
The fuel cartridge of claim 10 is characterized in that, in the 1 st aspect,
the conductive layer has a resistivity of 0.001 MOmega-M to 1 MOmega-M.
Effect of the utility model
According to the present invention, a fuel pipe which can suppress accumulation of static electricity and has excellent low fuel permeability can be provided.
Drawings
Fig. 1 is an example of a partial cross-sectional view of a fuel pipe of the present invention.
FIG. 2 is a cross-sectional view of the same fuel cartridge when it is expanded into a sheet form.
Detailed Description
The present invention is not limited to the following embodiments, but the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, the fuel cartridge 10 of the present invention is characterized by comprising: a conductive layer 11, a fuel barrier layer 12 containing a polymer having a chlorotrifluoroethylene unit disposed outside the conductive layer 11, an outermost layer 13 disposed outside the fuel barrier layer 12, a first adhesive layer 21 disposed between the conductive layer 11 and the fuel barrier layer 12, and a second adhesive layer 22 disposed between the fuel barrier layer 12 and the outermost layer 13; the conductive layer 11 includes a rubber portion 41 and a conductive filler portion 42 dispersed in the rubber portion 41, and the conductive filler portion 42 is 1 to 100 parts by mass with respect to 100 parts by mass of the rubber portion.
In the fuel pipe 10 having this configuration, the conductive layer 11 includes the rubber portion 41 and the conductive filler portion 42 dispersed in the rubber portion 41, and the conductive filler portion 42 is 1 to 100 parts by mass with respect to 100 parts by mass of the rubber portion, so that not only is the fuel resistance and the chemical resistance excellent, but also the fuel pipe 10 can sufficiently suppress permeation of fuel by suppressing accumulation of static electricity when fuel or a chemical liquid flows therethrough. Further, the properties required for fuel pipe 10 are provided in a well-balanced manner.
< conductive layer >
The conductive layer 11 of the fuel pipe 10 of the present invention includes a rubber portion 41 and a conductive filler portion 42 dispersed in the rubber portion 41. The resistivity of the conductive layer 11 is preferably 0.001M Ω · M to 1M Ω · M. The conductive layer 11 is preferably a layer containing at least 1 selected from the group consisting of: chlorosulfonated polyethylene (CSM), acrylonitrile-butadiene rubber (NBR), a hydride of acrylonitrile-butadiene rubber (HNBR), a blend rubber of polyvinyl chloride (PVC) with NBR or HNBR, a blend rubber of acrylic rubber (ACM) with NBR or HNBR, a blend rubber of ethylene acrylic rubber (AEM) with NBR or HNBR, epichlorohydrin rubber (ECO), and fluororubber.
The conductive layer 11 is preferably a layer containing a fluororubber or a blended rubber of polyvinyl chloride (PVC) and NBR or HNBR, and particularly preferably a layer containing a fluororubber. Thereby, the aging resistance, ozone resistance, weather resistance, abrasion resistance, and low fuel permeability of the fuel pipe 10 become more excellent, and high interlayer adhesiveness can be obtained.
< Fuel Barrier layer >
The fuel barrier layer 12 in the fuel pipe 10 of the present invention is disposed outside the conductive layer 11, and contains a polymer having a chlorotrifluoroethylene unit.
< outermost layer >
The outermost layer 13 in fuel pipe 10 of the present invention is preferably a non-fluororubber-containing layer.
The outermost layer 13 is particularly preferably a layer containing at least 1 selected from the group consisting of a blended rubber of polyvinyl chloride (PVC) with NBR or HNBR, chlorosulfonated polyethylene (CSM), and epichlorohydrin rubber (ECO). Thereby, the fuel pipe is more excellent in aging resistance, ozone resistance, weather resistance, abrasion resistance and low fuel permeability, and high interlayer adhesiveness can be obtained.
< adhesion layer >
The fuel cartridge 10 of the present invention has the first adhesive layer 21 disposed between the conductive layer 11 and the fuel barrier layer 12. By providing such a structure, high interlayer adhesiveness can be obtained.
The fuel cartridge 10 of the present invention has the second adhesive layer 22 disposed between the fuel barrier layer 12 and the outermost layer 13. By providing such a structure, high interlayer adhesiveness can be obtained.
The first and second adhesive layers 21 and 22 are preferably non-fluorine rubber-containing layers. This can provide higher interlayer adhesiveness.
The non-fluorine rubber is preferably at least 1 selected from the group consisting of acrylonitrile-butadiene rubber (NBR) and epichlorohydrin rubber (ECO).
The fuel cartridge 10 of the present invention may also have other layers. The other layers used in fuel cartridge 10 of the present invention preferably comprise at least one polymeric material selected from the group consisting of: a polymer having a chlorotrifluoroethylene unit, chlorosulfonated polyethylene (CSM), acrylonitrile-butadiene rubber (NBR), a hydride of acrylonitrile-butadiene rubber (HNBR), a blend rubber of polyvinyl chloride (PVC) with NBR or HNBR, a blend rubber of acrylic rubber (ACM) with NBR or HNBR, a blend rubber of ethylene acrylic rubber (AEM) with NBR or HNBR, a epichlorohydrin rubber (ECO), and a fluororubber.
< polymers having chlorotrifluoroethylene units >
Next, a polymer (CP) having a chlorotrifluoroethylene unit used in the present invention will be explained. The fuel pipe 10 of the present invention has a layer containing a polymer having Chlorotrifluoroethylene (CTFE) units, and therefore has excellent low fuel permeability. The polymer having CTFE units is preferably a resin having a definite melting point.
The polymer having a CTFE unit is preferably at least one selected from the group consisting of polychlorotrifluoroethylene [ PCTFE ] and a CTFE copolymer, more preferably at least one selected from the group consisting of PCTFE, a CTFE/TFE copolymer and an ethylene/CTFE copolymer, and most preferably a CTFE/TFE copolymer.
The CTFE copolymer is preferably a copolymer containing a CTFE unit and a unit derived from at least one monomer selected from the group consisting of: tetrafluoroethylene (TFE), Hexafluoropropylene (HFP), perfluoro (alkyl vinyl ether) (PAVE), vinylidene fluoride (VdF), vinyl fluoride, hexafluoroisobutylene, a copolymer of the formula CH2＝CX1(CF2)nX2A monomer represented by (wherein X is1Is H or F, X2H, F or Cl, n is an integer of 1 to 10), ethylene, propylene, 1-butene, 2-butene, vinyl chloride, and vinylidene chloride.
The CTFE copolymer is more preferably a copolymer containing a CTFE unit and a unit derived from at least 1 monomer selected from the group consisting of TFE, HFP, and PAVE.
The CTFE copolymer is particularly preferably a copolymer containing a CTFE unit, a TFE unit, and a monomer (α) unit derived from a monomer (α) copolymerizable with these.
The monomer (α) is not particularly limited as long as it is a monomer copolymerizable with CTFE and TFE, and examples thereof include ethylene (Et), VdF, CF2＝CF-ORf1Perfluoro (alkyl vinyl ether) [ PAVE ] (wherein, Rf)1Is C1-C8 perfluoroalkylBase), CX3X4＝CX5(CF2)nX6Vinyl monomer (formula, X)3、X4And X5Identical or different, is a hydrogen atom or a fluorine atom; x6Is a hydrogen atom, a fluorine atom or a chlorine atom; n is an integer of 1 to 10), CF2＝CF-OCH2-Rf2An alkyl perfluorovinyl ether derivative (wherein Rf)2Perfluoroalkyl group having 1 to 5 carbon atoms), among them, at least 1 selected from the group consisting of PAVE, the above vinyl monomer and alkyl perfluorovinyl ether derivative is preferable, and at least 1 selected from the group consisting of PAVE and HFP is more preferable.
As the above PAVE, CF is preferable2＝CF-ORf3Perfluoro (alkyl vinyl ether) (formula, Rf)3Represents a perfluoroalkyl group having 1 to 5 carbon atoms), and examples thereof include: perfluoro (methyl vinyl ether) [ PMVE ], perfluoro (ethyl vinyl ether) [ PEVE ], perfluoro (propyl vinyl ether) [ PPVE ], perfluoro (butyl vinyl ether) and the like, among which at least 1 selected from the group consisting of PMVE, PEVE and PPVE is more preferable, and PPVE is further preferable.
As the above alkyl perfluorovinyl ether derivative, Rf is preferred2Is a perfluoroalkyl group having 1 to 3 carbon atoms, more preferably CF2＝CF-OCH2-CF2CF3。
In the CTFE copolymer, the ratio of the CTFE unit to the TFE unit is preferably 15 to 90 mol% and the TFE unit is preferably 85 to 10 mol%, and more preferably 20 to 90 mol% and the TFE unit is preferably 80 to 10 mol%. Also, a copolymer comprising 15 to 25 mol% of CTFE units and 85 to 75 mol% of TFE units is preferable.
The CTFE copolymer preferably contains 90 to 99.9 mol% of a total of CTFE units and TFE units and 0.1 to 10 mol% of a monomer (α) unit, and when the amount of the monomer (α) unit is less than 0.1 mol%, moldability, environmental stress cracking resistance and fuel cracking resistance tend to deteriorate, and when it exceeds 10 mol%, fuel barrier properties, heat resistance and mechanical properties tend to deteriorate.
The CTFE copolymer is particularly preferably a CTFE/TFE/PAVE copolymer.
Among CTFE/TFE/PAVE copolymers, the above-mentioned PAVE may be mentioned: perfluoro (methyl vinyl ether) [ PMVE ], perfluoro (ethyl vinyl ether) [ PEVE ], perfluoro (propyl vinyl ether) [ PPVE ], perfluoro (butyl vinyl ether), etc., among which at least 1 selected from the group consisting of PMVE, PEVE and PPVE is preferable, and PPVE is more preferable.
In the CTFE/TFE/PAVE copolymer, the PAVE unit is preferably 0.5 mol% or more, preferably 5 mol% or less, of the total monomer units.
Polymers having CTFE units such as CTFE/TFE/PAVE copolymers may also have reactive functional groups. By making the polymer having CTFE units have a reactive functional group, a layer strongly adhered to an adjacent layer can be formed. The polymer having the CTFE unit more preferably has a reactive functional group at the end of the main chain and/or a side chain of the polymer, and the reactive functional group is preferably at least 1 selected from the group consisting of a carbonyl group, a hydroxyl group, a heterocyclic group, and an amino group.
In the present invention, a "carbonyl group" is a carbon-valent group composed of a carbon-oxygen double bond, and is represented by a group represented by — C (═ O) -. The reactive functional group containing a carbonyl group is not particularly limited, and examples thereof include the following groups containing a carbonyl group as a part of the chemical structure: carbonate group, carbonyl halide group (haloformyl group), formyl group, carboxyl group, ester group (-C (═ O) O-), acid anhydride bond (-C (═ O) O — C (═ O) -), isocyanate group, amide group, imide group (-C (═ O) -NH-C (═ O) -), carbamate bond (-NH-C (═ O) O-), carbamoyl group (NH-C (═ O) O-)2-C (═ O) -), carbamoyloxy (NH)2-C (═ O) O-), ureido (NH)2-C (═ O) -NH-), oxamyl (Oxamoyl group) (NH)2-C (═ O) -), and the like.
In the amide group, the imide group, the urethane bond, the carbamoyl group, the carbamoyloxy group, the ureido group, the oxamyl group, etc., the hydrogen atom bonded to the nitrogen atom thereof may be substituted with a hydrocarbon group such as an alkyl group.
The reactive functional group is preferably an amide group, a carbamoyl group, a hydroxyl group, a carboxyl group, a carbonate group, a carbonyl halide group, or an acid anhydride bond, and more preferably an amide group, a carbamoyl group, a hydroxyl group, a carbonate group, a carbonyl halide group, or an acid anhydride bond, from the viewpoint of easy introduction, and from the viewpoint that the polymer having a CTFE unit has appropriate heat resistance and good adhesiveness at a relatively low temperature.
Among them, the substance having a carbonate group and/or a carbonyl halide group disclosed in international publication No. 99/45044 is particularly preferable.
The polymer having a CTFE unit may include a polymer having a reactive functional group at either one of a main chain end or a side chain of the polymer, or may include a polymer having a reactive functional group at both a main chain end and a side chain. When the main chain has a reactive functional group at its end, the functional group may be present at both ends of the main chain or may be present at only one of the ends. When the reactive functional group further has an ether bond, the reactive functional group may be further provided in the main chain.
The polymer having a CTFE unit preferably contains a polymer having a reactive functional group at a main chain end, and is advantageous in terms of productivity and cost, without significantly deteriorating mechanical properties and chemical resistance.
The number of the reactive functional groups may be appropriately selected depending on the kind, shape, adhesion purpose, use, required adhesive force, adhesion method to an adjacent layer, and the like of the adjacent layer.
The number of the reactive functional groups present at the terminal of the main chain and/or the terminal of the side chain is 1X 10 carbon atoms per main chain6Preferably 3 to 800. Number of carbon atoms per main chain 1X 106When the number is less than 3, the adhesiveness is lowered. The more preferable lower limit is 15, the still more preferable lower limit is 30, and the particularly preferable lower limit is 50. From the viewpoint of productivity, the upper limit of the number of the reactive functional groups at the terminal is more preferably 200, for example.
The number of the reactive functional groups at the terminal can be calculated by performing infrared absorption spectrum analysis on a film having a thickness of 0.25 to 0.30mm obtained by compression molding a powder of a polymer having CTFE units at a molding temperature higher than the melting point thereof by 50 ℃ and a molding pressure of 5MPa with an infrared spectrophotometer.
The melting point of the polymer having a CTFE unit is not particularly limited, but is preferably 160 to 270 ℃.
The molecular weight of the polymer having CTFE units is preferably in a range that enables the resulting molded article to exhibit good mechanical properties, low fuel permeability, and the like. For example, when the Melt Flow Rate (MFR) is used as an index of the molecular weight, the MFR is preferably 0.5 to 100g/10 min at any temperature (e.g., 297 ℃) within a general molding temperature range of the fluoropolymer, i.e., within a range of about 230 to 350 ℃. The MFR (297 ℃ C., 5kg) of the polymer having CTFE units is more preferably 1 to 50g/10 min, still more preferably 2 to 40g/10 min.
As the polymer having a CTFE unit, NEOFLON CPT series manufactured by Dajin industries is preferable.
< non-fluororubber >
Next, the non-fluororubber used in the present invention will be explained. Examples of the non-fluororubbers used in the present invention include: chlorosulfonated polyethylene (CSM), acrylonitrile-butadiene rubber (NBR), a hydride of acrylonitrile-butadiene rubber (HNBR), a blend rubber of polyvinyl chloride (PVC) with NBR or HNBR, a blend rubber of acrylic rubber (ACM) with NBR or HNBR, a blend rubber of ethylene acrylic rubber (AEM) with NBR or HNBR, a epichlorohydrin rubber (ECO), and the like.
The chlorosulfonated polyethylene (CSM) is not particularly limited as long as it has chlorosulfonyl groups as crosslinking points, and conventionally known linear or branched chlorosulfonated polyethylene can be used. In addition, CSM may also be alkylated chlorosulfonated polyethylene (ACSM). The utility model discloses a fuel pipe is possessing under the condition that contains CSM's layer, the utility model discloses a fuel pipe has excellent characteristics such as ageing resistance, ozone resistance, weatherability, wearability, oil resistance. CSM is a synthetic rubber made by chlorinating and chlorosulfonating polyethylene. Examples of polyethylene used for the production of CSM include linear high-density polyethylene, and low-density polyethylene. ACSM is produced by chlorinating and chlorosulfonating a copolymer of ethylene and an olefin other than ethylene, having short-chain hydrocarbon side chains in the polyethylene main chain.
The acrylonitrile-butadiene rubber (NBR) is not particularly limited as long as it is a copolymer of acrylonitrile and butadiene, and conventionally known acrylonitrile-butadiene rubbers can be used. The hydrogenated product of acrylonitrile-butadiene rubber (HNBR) is not particularly limited as long as it is a rubber obtained by adding hydrogen to a double bond in a copolymer of acrylonitrile and butadiene, and conventionally known hydrogenated acrylonitrile-butadiene rubber can be used. The utility model discloses a fuel pipe 10 is under the condition that possesses the layer that contains NBR or HNBR, the utility model discloses a fuel pipe 10 has excellent characteristics such as oil resistance, wearability, ageing resistance.
The amount of nitrile bonded to the NBR and HNBR is not particularly limited, and may be appropriately selected according to the purpose, and may be, for example, in the range of 10 to 50 mass%. The hydrogenation ratio of HNBR is not particularly limited, and may be appropriately selected according to the purpose, and may be, for example, in the range of 80 to 100%.
The blend rubber of polyvinyl chloride and NBR or HNBR is not particularly limited as long as it is a polymer alloy of NBR or HNBR and polyvinyl chloride (PVC), and conventionally known blend rubbers can be used. The utility model discloses a fuel pipe 10 is under the condition that possesses the layer that contains polyvinyl chloride and NBR or HNBR's blend rubber, the utility model discloses a fuel pipe 10 has excellent characteristics such as oil resistance, wearability, ageing resistance, ozone resistance. The content of PVC in the rubber blend is not particularly limited, and may be appropriately selected according to the purpose, and for example, may be in the range of 1 to 50 mass% based on the total mass of NBR or HNBR and PVC.
The blend rubber of the ethylene acrylic rubber and NBR or HNBR is not particularly limited as long as it is a polymer alloy of NBR or HNBR and ethylene acrylic rubber (AEM), and conventionally known blend rubbers can be used. The utility model discloses a fuel pipe 10 is under the condition that possesses the layer that contains ethylene acrylic acid series rubber and NBR or HNBR's blend rubber, the utility model discloses a fuel pipe 10 has excellent characteristics such as oil resistance, wearability, ageing resistance, heat resistance. The content of AEM in the blend rubber is not particularly limited, and may be appropriately selected according to the purpose, and is, for example, in the range of 1 to 50 mass% based on the total mass of the NBR or HNBR and AEM. The AEM is not particularly limited as long as it is a copolymer of an acrylic ester and ethylene, and a conventionally known AEM can be used.
The epichlorohydrin rubber (ECO) is not particularly limited as long as it is a rubber having a polymerization unit based on epichlorohydrin, and may be a 1-membered polymer substantially containing only a polymerization unit based on epichlorohydrin, or a 2-membered or higher polymer containing a polymerization unit based on epichlorohydrin and a polymerization unit based on a monomer other than epichlorohydrin.
As the other monomer than epichlorohydrin, at least 1 monomer selected from the group consisting of ethylene oxide, propylene oxide, and allyl glycidyl ether is preferable, for example. As the ECO, a polymer having a polymerization unit based on epichlorohydrin and a polymerization unit based on ethylene oxide is preferable, and a polymer having a polymerization unit based on epichlorohydrin, a polymerization unit based on ethylene oxide, and a polymerization unit based on allyl glycidyl ether is more preferable.
As the ECO, for example, at least 1 polymer selected from the group consisting of the following polymers is preferable: epichlorohydrin homopolymers, epichlorohydrin-ethylene oxide copolymers, epichlorohydrin-allyl glycidyl ether copolymers, epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymers, epichlorohydrin-propylene oxide-allyl glycidyl ether copolymers, and epichlorohydrin-ethylene oxide-propylene oxide-allyl glycidyl ether tetrapolymers. More preferably at least 1 polymer selected from the group consisting of epichlorohydrin-ethylene oxide copolymers and epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymers. These may be used alone or in combination of 2 or more.
< fluororubber >
Next, fluororubbers used in the present invention will be explained. The Fluororubber (FKM) is not particularly limited as long as it is an amorphous fluoropolymer, and conventionally known fluororubbers can be used. The term "amorphous" means that the size of a melting peak (. DELTA.H) appearing in differential scanning calorimetry [ DSC ] (temperature rising rate of 10 ℃ C./minute) or differential thermal analysis [ DTA ] (temperature rising rate of 10 ℃ C./minute) of the fluoropolymer is 4.5J/g or less. Fluororubbers exhibit elastomeric properties by crosslinking. Elastomeric properties refer to the property of a polymer that is stretchable and can retain its original length when the force required to stretch the polymer is no longer applied.
As the fluororubber, a partially fluorinated rubber is preferable.
Examples of the partially fluorinated rubber include: vinylidene fluoride (VdF) based fluororubbers, Tetrafluoroethylene (TFE)/propylene (Pr) based fluororubbers, Tetrafluoroethylene (TFE)/propylene/vinylidene fluoride (VdF) based fluororubbers, ethylene/Hexafluoropropylene (HFP)/vinylidene fluoride (VdF) based fluororubbers, ethylene/Hexafluoropropylene (HFP)/Tetrafluoroethylene (TFE) based fluororubbers, and the like. Among them, at least 1 selected from the group consisting of vinylidene fluoride-based fluororubbers and tetrafluoroethylene/propylene-based fluororubbers is preferable.
The fluororubber has a glass transition temperature of preferably-70 ℃ or higher, more preferably-60 ℃ or higher, and still more preferably-50 ℃ or higher, from the viewpoint of excellent compression set at high temperatures. From the viewpoint of good cold resistance, it is preferably 5 ℃ or lower, more preferably 0 ℃ or lower, and still more preferably-3 ℃ or lower.
The glass transition temperature can be determined as the following temperature: a DSC curve was obtained by heating a 10mg sample at 10 ℃/min using a differential scanning calorimeter (DSC 822e, manufactured by mettler toledo corporation), and the temperature was represented by the midpoint of 2 intersections of the extension line of the base line before and after the second transition of the DSC curve and the tangent line at the inflection point of the DSC curve.
< conductive Filler >
The conductive filler is not particularly limited, and examples thereof include: conductive elemental powder or conductive elemental fiber of metal, carbon, or the like; powders of conductive compounds such as zinc oxide; surface-conduction treated powders, and the like. By providing the conductive filler part 42 dispersed in the rubber part 41 in the conductive layer 11, it is possible to prevent accumulation of static electricity due to friction between the fuel or chemical liquid and the fuel pipe 10, to prevent a fire or explosion that may occur due to discharge of static electricity, or to prevent cracks or perforations in the fuel pipe 10 and fuel leakage caused by the cracks or perforations.
The conductive simple substance powder or conductive simple substance fiber is not particularly limited, and examples thereof include: metal powder such as copper and nickel; metal fibers such as iron and stainless steel; carbon black, carbon fiber, carbon fibrils, carbon nanotubes, carbon nanohorns, and the like disclosed in Japanese patent application laid-open No. 3-174018 and the like.
The surface-conduction-treated powder is obtained by applying a conductive treatment to the surface of a non-conductive powder such as glass beads or titanium oxide. The method of the above-mentioned conductive treatment is not particularly limited, and examples thereof include metal sputtering, electroless plating, and the like. Among the above-mentioned conductive fillers, carbon black is preferably used because it is advantageous from the viewpoint of economy.
The conductive filler 42 is dispersed in the rubber 41 in an amount of 1 to 100 parts by mass per 100 parts by mass of the rubber. Preferably 1 to 30 parts by mass, a more preferable lower limit is 5 parts by mass, and a more preferable upper limit is 20 parts by mass.
< Fuel pipe >
The thickness of each layer in the fuel pipe 10 of the present invention may be selected appropriately according to the purpose of use, the manner of use, and the like.
The thickness t1 of the conductive layer is not particularly limited, but is preferably 0.1 to 3mm, and more preferably 0.3 to 2 mm. The thickness of the layer other than the conductive layer 11 in the fuel tube 10 is not particularly limited, but is preferably 0.01 to 3mm, more preferably 0.03 to 2mm, and still more preferably 0.05 to 2 mm.
The thickness T1 of the conductive layer is preferably 5 to 60%, more preferably 10 to 50%, and particularly preferably 15 to 45% of the thickness T of the fuel tube. The thickness T of the fuel tube refers to the sum of the thicknesses of all layers that make up fuel tube 10.
The thickness t2 of the fuel barrier layer is not particularly limited, but is preferably 0.01 to 0.5mm, and more preferably 0.05 to 0.4 mm.
The thickness T2 of the fuel barrier layer is preferably 1 to 30%, more preferably 2 to 20%, and particularly preferably 3 to 15% of the thickness T of the fuel tube.
The thickness t3 of the outermost layer is not particularly limited, but is preferably 0.1 to 4mm, and more preferably 0.3 to 3 mm.
The thickness T3 of the outermost layer is preferably 5 to 75%, more preferably 10 to 70%, and particularly preferably 20 to 60% of the thickness T of the fuel tube.
The thicknesses t4 and t5 of the first adhesive layer and the second adhesive layer are not particularly limited, but are preferably 0.03 to 2mm, and more preferably 0.05 to 1 mm.
The thicknesses T4 and T5 of the first adhesive layer and the second adhesive layer are preferably 1 to 30%, more preferably 2 to 20%, and particularly preferably 3 to 15% of the thickness T of the fuel tube, respectively.
The shape of the fuel pipe 10 of the present invention is not particularly limited, and may be, for example, a wave shape, a corrugated shape, a spiral (coiled) shape, or the like.
The fuel cartridge 10 of the present invention can be manufactured by a conventionally known method.
While the embodiments have been described, it is to be understood that various changes in form and details may be made therein without departing from the spirit and scope of the appended claims.
Next, the fuel pipe 10 of the present invention will be described with reference to examples.
In this example, a mixture containing NBR + PVC (NBR: PVC 70:30 (mass ratio)) and a conductive filler was used as the conductive layer material. The mixture was electrically conductive, and the strand obtained from the mixture had a resistivity of 0.01 M.OMEGA.m. A polymer having chlorotrifluoroethylene units was used as the fuel barrier layer material, CSM was used as the outermost layer material, NBR was used as the first adhesive layer material, and NBR was used as the second adhesive layer material.
In addition, as a polymer having a chlorotrifluoroethylene unit, Chlorotrifluoroethylene (CTFE)/perfluoro (propyl vinyl ether) (PPVE)/Tetrafluoroethylene (TFE) copolymer (CTFE/PPVE/TFE ═ 21.3/2.4/76.3 (mol%)) was used.
The polymer materials constituting the respective layers were extrusion-molded using an extrusion molding machine to obtain an unvulcanized pipe. The obtained unvulcanized tube was steam-vulcanized in a vulcanizing boiler at 160 ℃ for 40 minutes to obtain a fuel hose having a 5-layer structure. The thickness of each layer is respectively as follows: the conductive layer is 0.5mm, the fuel barrier layer is 0.15mm, the outermost layer is 1.5mm, the first adhesive layer is 0.5mm, and the second adhesive layer is 0.5 mm.
For the adhesion test, the obtained fuel hose was cut into a length of 2 cm. Thereafter, the hose was cut in the extrusion direction to measure the adhesive strength in the circumferential direction, but material failure occurred and peeling between any layers was not allowed.
The fuel pipe of the present invention is not limited to the above-described embodiments. Preferred examples of the fuel pipe of the present invention include fuel pipes having the layer structure shown in table 1. The layer structure shown in table 1 is a preferred example, and the layer structure, the application range, and the use of the fuel pipe of the present invention are not limited.
[ TABLE 1 ]
| Outermost layer | CSM | NBR+PVC | ECO | ECO | CSM | NBR+PVC | ECO | ECO | CSM | NBR+PVC | ECO |
| Second adhesive layer | NBR | NBR | ECO | NBR | NBR | NBR | ECO | NBR | NBR | NBR | ECO |
| Fuel barrier layer | CP | CP | CP | CP | CP | CP | CP | CP | CP | CP | CP |
| First adhesive layer | ECO | ECO | ECO | ECO | NBR | NBR | NBR | NBR | NBR | NBR | NBR |
| Conductive layer | FKM | FKM | FKM | FKM | FKM | FKM | FKM | FKM | NBR+PVC | NBR+PVC | NBR+PVC |
The fuel tubes of the present invention do not include the fuel tube having the layer structure shown in table 2. The fuel pipe having the layer composition shown in table 2 may have insufficient adhesiveness.
[ TABLE 2 ]
| Outermost layer | NBR | ECO |
| Second adhesive layer | ECO | |
| Fuel barrier layer | CP | CP |
| First adhesive layer | ||
| Conductive layer | FKM | FKM |
The abbreviations in tables 1 and 2 represent the following polymer materials, respectively.
CSM: chlorosulfonated polyethylene
NBR: acrylonitrile-butadiene rubber or hydride of acrylonitrile-butadiene rubber
NBR + PVC: blend rubber of polyvinyl chloride and NBR or HNBR
NBR + AEM: blended rubber of ethylene acrylic rubber and NBR or HNBR
ECO: epichlorohydrin rubber
FKM: fluororubber
And (3) CP: polymers having chlorotrifluoroethylene units.
Claims (10)
1. A fuel cartridge, characterized in that the fuel cartridge has:
a conductive layer is formed on the substrate,
a fuel barrier layer disposed on an outer side of the conductive layer, the fuel barrier layer containing a polymer having a chlorotrifluoroethylene unit,
an outermost layer disposed outside the fuel barrier layer,
a first adhesive layer disposed between the conductive layer and the fuel barrier layer, an
A second adhesive layer disposed between the fuel barrier layer and the outermost layer;
the conductive layer includes a rubber portion and a conductive filler portion dispersed in the rubber portion, and the conductive filler portion is 1 to 100 parts by mass with respect to 100 parts by mass of the rubber portion.
2. The fuel cartridge of claim 1,
the conductive filler part is 10 to 50 parts by mass with respect to 100 parts by mass of the rubber part.
3. The fuel cartridge of claim 1,
the thickness of the fuel barrier layer is 0.01-0.5 mm.
4. The fuel cartridge of claim 1,
the thickness of the fuel barrier layer is 1-30% of the thickness of the fuel pipe.
5. The fuel cartridge of claim 1,
the conducting layer is a layer containing fluororubber, and the thickness of the conducting layer is 0.1-3 mm.
6. The fuel cartridge of claim 1,
the thickness of the conducting layer is 0.1-3 mm.
7. The fuel cartridge of claim 1,
the outermost layer is a layer containing non-fluororubber, and the thickness is 0.1-3 mm.
8. The fuel cartridge of claim 1,
the first bonding layer is a non-fluorine rubber-containing layer, and the thickness of the first bonding layer is 0.1-2 mm.
9. The fuel cartridge of claim 1,
the second adhesive layer is a layer containing non-fluorine rubber, and the thickness of the second adhesive layer is 0.1-2 mm.
10. The fuel cartridge of claim 1,
the conductive layer has a resistivity of 0.001 MOmega-M to 1 MOmega-M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822214148.1U CN210362814U (en) | 2018-12-27 | 2018-12-27 | Fuel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822214148.1U CN210362814U (en) | 2018-12-27 | 2018-12-27 | Fuel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210362814U true CN210362814U (en) | 2020-04-21 |
Family
ID=70229910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822214148.1U Active CN210362814U (en) | 2018-12-27 | 2018-12-27 | Fuel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210362814U (en) |
-
2018
- 2018-12-27 CN CN201822214148.1U patent/CN210362814U/en active Active
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