JP2016216710A - Tape, laminate, pipe and riser tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape excellent in abrasion resistance and excellent in mechanical strength and low permeability in high temperature environment.SOLUTION: There is provided a tape consisting of a fluorine resin. The fluorine resin is a copolymer containing tetrafluoroethylene, vinylidene fluoride and a copolymer unit of an ethylenic unsaturated monomer (excluding tetrafluoroethylene and vinylidene fluoride), and having storage elastic modulus (E') at 170°C by dynamic viscoelasticity measurement of 60 to 400 MPa.SELECTED DRAWING: None

Description

The present invention relates to a tape, a laminate, a pipe, and a riser pipe.

Pipes used in offshore oil fields include risers (crude oil pumping), umbilicals (pipe control and pumps for reducing the viscosity of crude oil, and power cables combined into a single pipe), flow line (Pipe for transporting pumped crude oil to the sea floor). Neither structure is uniform, and metal-only pipes and metal / resin hybrid pipes are known, but metal-only pipes tend to decrease for weight reduction, and metal / resin hybrids are the mainstream. It is becoming. Since the temperature of the crude oil pumped by the deepening has increased, the resin used has mechanical strength and chemical resistance at high temperatures (resistance to high-temperature crude oil, resistance to acidic gases such as hydrogen sulfide contained in crude oil). Resistance at high temperature, resistance at high temperatures to chemicals such as methanol, CO ₂ , and hydrogen chloride injected to reduce crude oil viscosity) and low permeability at high temperatures have been demanded. Accordingly, there is a need for materials that replace polyamides (up to 90 ° C. usable temperature) and polyvinylidene fluoride (up to 130 ° C. usable temperature) currently used in pipes.

As a material suitable for a riser tube, Patent Document 1 discloses copolymer units of tetrafluoroethylene, vinylidene fluoride, and ethylenically unsaturated monomers (excluding tetrafluoroethylene and vinylidene fluoride). A fluororesin having a specific storage elastic modulus is described.

International Publication No. 2010/110129

A flexible tube such as a riser tube that allows a high-temperature fluid to flow is often provided with a layer made of a tape such as a resin for the purpose of reducing friction between layers. As the oil field has been deepened in recent years, the temperature of the environment for pumping crude oil has been increasing, so that further improvement of the properties of the tape as described above is required.

The present invention has been made in view of the above situation, and has a tape excellent in abrasion resistance and excellent in mechanical strength and low permeability in a high temperature environment, and a laminate, pipe and riser pipe using the tape. The purpose is to provide.

The present invention is a tape made of a fluororesin, and the fluororesin is composed of tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer (excluding tetrafluoroethylene and vinylidene fluoride). It is a tape comprising a copolymer unit and having a storage elastic modulus (E ′) at 170 ° C. of 60 to 400 MPa by dynamic viscoelasticity measurement.

The fluororesin is 55.0-90.0 mol% tetrafluoroethylene, 5.0-44.9 mol% vinylidene fluoride, and 0.1-10.0 mol% of formula (1). It is preferable that it is a copolymer containing the copolymerization unit of the ethylenically unsaturated monomer represented.
Formula (1): CX ¹ X ² = CX ³ (CF ₂ ) _n X ⁴
(In the formula, X ¹ , X ² , X ³ and X ⁴ are the same or different and represent H, F or Cl, and n represents an integer of 0 to 8, except for tetrafluoroethylene and vinylidene fluoride. )

The fluororesin is 55.0-90.0 mol% tetrafluoroethylene, 9.2-44.2 mol% vinylidene fluoride, and 0.1-0.8 mol% of formula (2). It is preferable that it is a copolymer containing the copolymerization unit of the ethylenically unsaturated monomer represented.
Formula (2): CF ₂ = CF-ORf ¹
(In the formula, Rf ¹ represents an alkyl group having 1 to 3 carbon atoms or a fluoroalkyl group having 1 to 3 carbon atoms.)

The fluororesin is represented by 55.0-90.0 mol% tetrafluoroethylene, 5.0-44.8 mol% vinylidene fluoride, 0.1-10.0 mol% of formula (1). A copolymer containing copolymerized units of an ethylenically unsaturated monomer and 0.1 to 0.8 mol% of an ethylenically unsaturated monomer represented by the formula (2). preferable.
Formula (1): CX ¹ X ² = CX ³ (CF ₂ ) _n X ⁴
(In the formula, X ¹ , X ² , X ³ and X ⁴ are the same or different and represent H, F or Cl, and n represents an integer of 0 to 8, except for tetrafluoroethylene and vinylidene fluoride. )
Formula (2): CF ₂ = CF-ORf ¹
(In the formula, Rf ¹ represents an alkyl group having 1 to 3 carbon atoms or a fluoroalkyl group having 1 to 3 carbon atoms.)

The tape is preferably a belt-like body that can be wound up.

This invention is also a laminated body which consists of a 1st layer, the 2nd layer which consists of the said tape formed on the 1st layer, and the 3rd layer formed on the 2nd layer.

The first layer and the third layer are preferably metal layers.

The present invention is also a pipe made of the above laminate.

It is preferable that the first layer, the second layer, and the third layer are laminated in this order from the inside of the pipe, and the second layer is formed by winding the tape around the outer periphery of the first layer.

The pipe further includes a flexible tube, the first layer is formed on the outer periphery of the tube, and the second layer is formed by winding the tape around the outer periphery of the first layer. The third layer is preferably formed on the outer periphery of the second layer.

This invention is also a riser pipe provided with the said pipe.

ADVANTAGE OF THE INVENTION According to this invention, while being excellent in abrasion resistance, the tape excellent in the mechanical strength in a high temperature environment and low permeability, and a laminated body, a pipe, and a riser pipe using the same can be provided.

Fig.1 (a)-(c) is a schematic diagram of an example which shows the shape of a tape, respectively. FIG. 2 is a schematic diagram of an example showing the configuration of the pipe. FIG. 3 is a schematic diagram of an example showing a method of winding a tape. FIGS. 4A to 4E are schematic diagrams of examples showing the winding state of the tape, respectively. FIG. 5 is a schematic diagram of another example showing the configuration of the pipe. FIG. 6 is a schematic diagram of an example showing the configuration of the riser pipe (or flow line).

Hereinafter, the present invention will be specifically described.

The present invention is a tape made of a fluororesin, and the fluororesin is composed of tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer (excluding tetrafluoroethylene and vinylidene fluoride). It is a copolymer containing copolymerized units, and has a storage elastic modulus (E ′) at 170 ° C. by dynamic viscoelasticity measurement of 60 to 400 MPa. The tape of the present invention is excellent in abrasion resistance and mechanical strength and low permeability in a high temperature environment by being made of the above fluororesin. Therefore, when the tape of the present invention is interposed between two layers made of metal or the like, friction between the layers can be reduced. Moreover, even if the tape of the present invention is used in a high temperature environment, the mechanical strength is not easily lowered. In addition, when the tape of the present invention is applied to a tape layer that constitutes a flexible tube that circulates a high-temperature fluid, such as a riser tube, the high-temperature fluid permeation to the outer layer of the tape layer is suppressed. Therefore, corrosion of the outer layer due to the high temperature fluid can be prevented. In addition, a decrease in strength of the flexible tubes can be prevented.
Note that in this specification, high temperature means 100 ° C. or higher, preferably 130 ° C. or higher, more preferably 150 ° C. or higher. The upper limit is 200 ° C., for example.

The fluororesin in the present invention exhibits a high storage elastic modulus even at a high temperature of 170 ° C. If the storage elastic modulus at a high temperature is too low, the mechanical strength is rapidly reduced and deformation is likely to occur. If it is too high, the resin will be too hard and it will be difficult to wind it when it is formed into a tape. In particular, when a conventional fluororesin is used as a material for a tape layer constituting a flexible tube used under a high temperature and a high pressure for circulating a fluid of 150 ° C. or higher, the mechanical strength of the tape layer is reduced or the temperature is increased. May flow out of the tape layer. On the other hand, since the fluororesin used in the tape of the present invention has a high storage elastic modulus even at high temperatures, it is excellent in mechanical strength, chemical resistance and low permeability at high temperatures, and such disadvantages can be avoided.

The storage elastic modulus is a value measured at 170 ° C. by dynamic viscoelasticity measurement. More specifically, the storage elastic modulus is a dynamic viscoelastic device DVA220 manufactured by IT-Measurement Control Co., Ltd., having a length of 30 mm, a width of 5 mm, a thickness of 0. This is a value obtained by measuring a 25 mm sample under the conditions of a tensile mode, a grip width of 20 mm, a measurement temperature of 25 ° C. to 250 ° C., a temperature increase rate of 2 ° C./min, and a frequency of 1 Hz. A preferable storage elastic modulus (E ′) at 170 ° C. is 80 to 350 MPa, and a more preferable storage elastic modulus (E ′) is 100 to 350 MPa.
The measurement sample is, for example, by setting the molding temperature to a temperature 50 to 100 ° C. higher than the melting point of the fluororesin and cutting the film molded to a thickness of 0.25 mm at a pressure of 3 MPa into a length of 30 mm and a width of 5 mm. Can be created.

The fluororesin is a copolymer containing copolymerized units of tetrafluoroethylene, vinylidene fluoride and an ethylenically unsaturated monomer.

The ethylenically unsaturated monomer is not particularly limited as long as it is a monomer copolymerizable with tetrafluoroethylene and vinylidene fluoride, but is ethylenic represented by the following formulas (1) and (2). It is preferably at least one selected from the group consisting of unsaturated monomers.

Formula (1): CX ¹ X ² = CX ³ (CF ₂ ) _n X ⁴
(In the formula, X ¹ , X ² , X ³ and X ⁴ are the same or different and represent H, F or Cl, and n represents an integer of 0 to 8, provided that tetrafluoroethylene and vinylidene fluoride are substituted. except.)

Formula (2): CF ₂ = CF-ORf ¹
(In the formula, Rf ¹ represents an alkyl group having 1 to 3 carbon atoms or a fluoroalkyl group having 1 to 3 carbon atoms.)

Examples of the ethylenically unsaturated monomer represented by the formula (1) include CF ₂ = CFCl, CF ₂ = CFCF ₃ , and the following formula (3):
^{_{CH 2 = CF- (CF 2)}} n X 4 (3)
(Wherein X ⁴ and n are the same as above) and the following formula (4):
^{_{CH 2 = CH- (CF 2)}} n X 4 (4)
(Wherein X ⁴ and n are the same as above)
It is preferably at least one selected from the group consisting of: CF ₂ = CFCl, CH ₂ = CFCF ₃ , CH ₂ = CH-C ₄ F ₉ , CH ₂ = CH-C ₆ F ₁₃ , CH ₂ = More preferably, it is at least one selected from the group consisting of CF-C ₃ F ₆ H and CF ₂ = CFCF _3, and at least one selected from CF ₂ = CFCl and CH ₂ = CFCF ₃ Is more preferable.

The ethylenically unsaturated monomer represented by the formula (2) includes a group consisting of CF ₂ = CF-OCF ₃ , CF ₂ = CF-OCF ₂ CF ₃ and CF ₂ = CF-OCF ₂ CF ₂ CF _3. It is preferable that it is at least one selected from more.

The fluororesin is
55.0-90.0 mol% tetrafluoroethylene,
5.0-44.9 mol% vinylidene fluoride, and
0.1-10.0 mol% of formula (1):
CX ¹ X ² = CX ³ (CF ₂ ) _n X ⁴ (1)
(In the formula, X ¹ , X ² , X ³ and X ⁴ are the same or different and represent H, F or Cl, and n represents an integer of 0 to 8, except for tetrafluoroethylene and vinylidene fluoride. )
An ethylenically unsaturated monomer represented by
It is preferable that it is a copolymer containing these copolymer units.

More preferably,
55.0-85.0 mol% tetrafluoroethylene,
10.0-44.9 mol% vinylidene fluoride, and
0.1 to 5.0 mol% of an ethylenically unsaturated monomer represented by the formula (1),
It is a copolymer containing the copolymerization unit.

More preferably,
55.0-85.0 mol% tetrafluoroethylene,
13.0-44.9 mol% vinylidene fluoride, and
0.1 to 2.0 mol% of an ethylenically unsaturated monomer represented by the formula (1),
It is a copolymer containing the copolymerization unit.

In addition to improving the mechanical strength of the fluororesin at high temperatures, the low permeability of the fluororesin is particularly excellent, so that the ethylenically unsaturated monomer represented by the formula (1) is CH ₂ ═CH— C ₄ F _9, it is preferable that _{CH 2 = CH-C 6 F} 13 and _{CH 2 = CF-C 3 F} 6 of at least one monomer selected from the group consisting of H. More preferably, the ethylenically unsaturated monomer represented by the formula (1) is CH ₂ ═CH—C ₄ F ₉ , CH ₂ ═CH—C ₆ F ₁₃ and CH ₂ ═CF—C ₃ F ₆ H. Tetrafluoroethylene having at least one monomer selected from the group consisting of 55.0 to 80.0 mol% of a fluororesin,
19.5-44.9 mol% vinylidene fluoride, and
0.1 to 0.6 mol% of an ethylenically unsaturated monomer represented by the formula (1),
It is a copolymer containing the copolymer unit of this.

The fluororesin is 58.0 to 85.0 mol% tetrafluoroethylene,
10.0-41.9 mol% vinylidene fluoride, and
0.1 to 5.0 mol% of an ethylenically unsaturated monomer represented by the formula (1),
A copolymer containing the copolymer unit may be used.

The fluororesin is
55.0-90.0 mol% tetrafluoroethylene,
9.2-44.2 mol% vinylidene fluoride, and
0.1 to 0.8 mol% of formula (2):
CF ₂ = CF-ORf ¹ (2)
(In the formula, Rf ¹ represents an alkyl group having 1 to 3 carbon atoms or a fluoroalkyl group having 1 to 3 carbon atoms.)
It is also preferable that it is a copolymer containing the copolymerization unit of the ethylenically unsaturated monomer represented by these.

More preferably,
58.0-85.0 mol% tetrafluoroethylene,
14.5 to 39.9 mol% vinylidene fluoride, and
0.1 to 0.5 mol% of an ethylenically unsaturated monomer represented by the formula (2),
It is a copolymer containing the copolymerization unit.

The fluororesin is
55.0-90.0 mol% tetrafluoroethylene,
5.0-44.8 mol% vinylidene fluoride,
0.1 to 10.0 mol% of an ethylenically unsaturated monomer represented by the formula (1), and
0.1 to 0.8 mol% of an ethylenically unsaturated monomer represented by the formula (2),
It is also preferable that it is a copolymer containing these copolymer units.

More preferably,
55.0-85.0 mol% tetrafluoroethylene,
9.5-44.8 mol% vinylidene fluoride,
0.1 to 5.0 mol% of an ethylenically unsaturated monomer represented by the formula (1), and
0.1 to 0.5 mol% of an ethylenically unsaturated monomer represented by the formula (2),
It is a copolymer containing the copolymerization unit.

More preferably 55.0-80.0 mol% tetrafluoroethylene,
19.8-44.8 mol% vinylidene fluoride,
0.1 to 2.0 mol% of an ethylenically unsaturated monomer represented by the formula (1), and
0.1 to 0.3 mol% of an ethylenically unsaturated monomer represented by the formula (2),
It is a copolymer containing the copolymerization unit. When the fluororesin has this composition, it is particularly excellent in low permeability.

The fluororesin is
58.0-85.0 mol% tetrafluoroethylene,
9.5-39.8 mol% vinylidene fluoride,
0.1 to 5.0 mol% of an ethylenically unsaturated monomer represented by the formula (1), and
0.1 to 0.5 mol% of an ethylenically unsaturated monomer represented by the formula (2),
A copolymer containing the copolymer unit may be used.

When the content of each monomer is within the above range, the fluororesin has higher crystallinity and 170 ° C. than a conventionally known copolymer comprising tetrafluoroethylene, vinylidene fluoride and a third component. However, since the storage elastic modulus is high, it is excellent in mechanical strength, chemical resistance and low permeability at high temperatures. The low permeability at a high temperature is, for example, low permeability to methane, hydrogen sulfide, CO ₂ , methanol, hydrochloric acid and the like.

The content of each monomer in the copolymer can be calculated by appropriately combining NMR and elemental analysis depending on the type of monomer.

The fluororesin preferably has a melt flow rate (MFR) of 0.1 to 50 g / 10 min.

The above MFR is based on ASTM D3307-01 and uses a melt indexer (manufactured by Toyo Seiki Co., Ltd.) at 297 ° C. under a load of 5 kg and the mass of the polymer flowing out from a nozzle having an inner diameter of 2 mm and a length of 8 mm per 10 minutes. (G / 10 minutes).

The fluororesin preferably has a melting point of 180 ° C. or higher, and the upper limit may be 290 ° C. A more preferred lower limit is 200 ° C and an upper limit is 270 ° C.

The melting point is measured using a differential scanning calorimeter RDC220 (manufactured by Seiko Instruments) at a heating rate of 10 ° C./min according to ASTM D-4591, and the temperature corresponding to the peak of the endothermic curve obtained is the melting point. And

The fluororesin preferably has a thermal decomposition start temperature (1% mass loss temperature) of 360 ° C. or higher. A more preferred lower limit is 370 ° C. If the said thermal decomposition start temperature is in the said range, an upper limit can be 410 degreeC, for example.

The thermal decomposition start temperature is a temperature at which 1% by mass of the fluororesin subjected to the heating test is decomposed, and the mass of the fluororesin subjected to the heating test using the differential thermal / thermogravimetric measuring device [TG-DTA] is This is a value obtained by measuring the temperature when the mass decreases by 1% by mass.

The fluororesin can be produced by a polymerization method such as solution polymerization, bulk polymerization, emulsion polymerization, suspension polymerization or the like, but is produced by emulsion polymerization or suspension polymerization in that it is industrially easy to implement. It is preferable.

In the above polymerization, a polymerization initiator, a surfactant, a chain transfer agent, and a solvent can be used, and conventionally known ones can be used.

As the polymerization initiator, an oil-soluble radical polymerization initiator or a water-soluble radical polymerization initiator can be used.

The oil-soluble radical polymerization initiator may be a known oil-soluble peroxide, for example, dialkyl such as diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, disec-butyl peroxydicarbonate, etc. Peroxyesters such as peroxycarbonates, t-butylperoxyisobutyrate and t-butylperoxypivalate, dialkyl peroxides such as di-t-butylperoxide, and the like are also used as di (ω-hydro -Dodecafluoroheptanoyl) peroxide, di (ω-hydro-tetradecafluoroheptanoyl) peroxide, di (ω-hydro-hexadecafluorononanoyl) peroxide, di (perfluorobutyryl) peroxide, di (Perfluorovaleryl) peroxa Di (perfluorohexanoyl) peroxide, di (perfluoroheptanoyl) peroxide, di (perfluorooctanoyl) peroxide, di (perfluorononanoyl) peroxide, di (ω-chloro-hexafluoro) Butyryl) peroxide, di (ω-chloro-decafluorohexanoyl) peroxide, di (ω-chloro-tetradecafluorooctanoyl) peroxide, ω-hydro-dodecafluoroheptanoyl-ω-hydrohexadecafluoro Nonanoyl-peroxide, ω-chloro-hexafluorobutyryl-ω-chloro-decafluorohexanoyl-peroxide, ω-hydrododecafluoroheptanoyl-perfluorobutyryl-peroxide, di (dichloropentafluorobutanoyl ) Oxide, di (trichlorooctafluorohexanoyl) peroxide, di (tetrachloroundecafluorooctanoyl) peroxide, di (pentachlorotetradecafluorodecanoyl) peroxide, di (undecachlorodotriacontafluorodocosanoyl) ) Peroxide di [perfluoro (or fluorochloro) acyl] peroxides and the like.

The water-soluble radical polymerization initiator may be a known water-soluble peroxide, for example, ammonium salts such as persulfuric acid, perboric acid, perchloric acid, perphosphoric acid, percarbonate, potassium salts, sodium salts. , T-butyl permalate, t-butyl hydroperoxide and the like. A reducing agent such as sulfites and sulfites may be used in combination with the peroxide, and the amount used may be 0.1 to 20 times the peroxide.

As the surfactant, a known surfactant can be used. For example, a nonionic surfactant, an anionic surfactant, a cationic surfactant, or the like can be used. Among these, fluorine-containing anionic surfactants are preferable, and may include ether-bonded oxygen (that is, oxygen atoms may be inserted between carbon atoms), linear or branched having 4 to 20 carbon atoms. A fluorine-containing anionic surfactant is more preferable. The addition amount (with respect to polymerization water) is preferably 50 to 5000 ppm.

Examples of the chain transfer agent include hydrocarbons such as ethane, isopentane, n-hexane, and cyclohexane; aromatics such as toluene and xylene; ketones such as acetone; and acetates such as ethyl acetate and butyl acetate; Examples include alcohols such as methanol and ethanol; mercaptans such as methyl mercaptan; halogenated hydrocarbons such as carbon tetrachloride, chloroform, methylene chloride, and methyl chloride. The addition amount may vary depending on the chain transfer constant of the compound used, but is usually used in the range of 0.01 to 20% by mass with respect to the polymerization solvent.

Examples of the solvent include water, a mixed solvent of water and alcohol, and the like.

In the suspension polymerization, a fluorine-based solvent may be used in addition to water. Examples of the fluorine-based solvent include hydrochlorofluoroalkanes such as CH ₃ CClF ₂ , CH ₃ CCl ₂ F, CF ₃ CF ₂ CCl ₂ H, CF ₂ ClCF ₂ CFHCl; CF ₂ ClCFClCF ₂ CF ₃ , CF ₃ CFClCFClCF _3, etc. Perfluoroalkanes such as perfluorocyclobutane, CF ₃ CF ₂ CF ₂ CF ₃ , CF ₃ CF ₂ CF ₂ CF ₂ CF ₃ , CF ₃ CF ₂ CF ₂ CF ₂ CF ₂ CF ₃ , etc. Among them, perfluoroalkanes are preferable. The amount of the fluorine-based solvent used is preferably 10 to 100% by mass with respect to the aqueous medium from the viewpoint of suspendability and economy.

It does not specifically limit as polymerization temperature, It may be 0-100 degreeC. The polymerization pressure is appropriately determined according to other polymerization conditions such as the type, amount and vapor pressure of the solvent to be used, the polymerization temperature, etc., but may usually be 0 to 9.8 MPaG.

The tape of the present invention may further contain other components other than the fluororesin. Other components include reinforcing fibers, fillers, plasticizers, processing aids, mold release agents, pigments, flame retardants, lubricants, light stabilizers, weathering stabilizers, conductive agents, antistatic agents, ultraviolet absorbers, Antioxidants, foaming agents, fragrances, oils, softening agents, dehydrofluorinating agents, nucleating agents and the like can be mentioned.

Examples of the reinforcing fiber include carbon fiber, glass fiber, and basalt fiber. Examples of the filler include polytetrafluoroethylene, mica, silica, talc, celite, clay, titanium oxide, and barium sulfate. Examples of the conductive agent include carbon black. Examples of the plasticizer include dioctyl phthalic acid and pentaerythritol. Examples of processing aids include carnauba wax, sulfone compounds, low molecular weight polyethylene, and fluorine-based aids. Examples of the dehydrofluorinating agent include organic oniums and amidines.

Among the other components described above, the tape of the present invention preferably contains reinforcing fibers. Thereby, abrasion resistance and mechanical strength and low permeability in a high temperature environment can be further improved.

In the tape of the present invention, a resin other than the fluororesin may be blended, or another rubber may be blended. Among these, a blend with at least one selected from the group consisting of polyvinylidene fluoride (PVDF), polyetheretherketone (PEEK) and polytetrafluoroethylene (PTFE) is preferable.

The tape of the present invention is preferably a belt-like body having flexibility capable of being wound (or wound).

Although the shape of the tape of this invention will not be specifically limited if it is a substantially strip shape, The following can be illustrated.

(1) The shape of the cross section is rectangular The tape of the aspect (1) has a simple shape and is easy to manufacture.
FIG. 1A shows a cross section of an example of the tape of the aspect (1).

(2) What has thin portions at both ends in the width direction The tape of the aspect (2) can be wound around the object without any gaps by winding so that the thin portions of adjacent tapes overlap each other at the time of winding. Even if it is a case where it applies to the tape layer which comprises the flexible pipe | tube which distribute | circulates this fluid, permeation | transmission of the high temperature fluid to the exterior can be suppressed easily. Moreover, the thickness of the tape layer obtained can be made uniform easily by overlapping thin parts.

The thin portions at both ends in the width direction are preferably provided on opposite ends in the thickness direction. That is, it is preferable that one thin portion is provided on the upper end side in the thickness direction and the other is provided on the lower end side.

FIG. 1B shows a cross section of an example of the tape of the aspect (2).
Thin portions 3 that are thinner than the central portion 2 are provided at both ends in the width direction of the tape 1b. One thin part 3 is provided on the upper end side in the thickness direction of the tape 1b, and the other thin part 3 is provided on the lower end side.
The mode (2) does not include the mode (3) described later.

(3) A tape having a shape that can lock the end in the width direction with the end in the width direction of the adjacent tape at the time of winding. For example, the shape of the cross section is substantially Z-shaped. The shape may be a shape, a substantially U shape, a substantially S shape, a substantially T shape, a substantially I shape, or the like, but is not limited to these shapes.
The tape of the aspect (3) can be obtained by winding the tape so that the end portions in the width direction of adjacent tapes are engaged with each other at the time of winding. Therefore, when the tape is applied to a tape layer constituting a flexible tube through which a high-temperature fluid flows, the tape can be prevented from being displaced when the flexible tube is bent or twisted. As a result, the outflow of the fluid flowing through the inside of the flexible tubes can be prevented more reliably.

As the tape of the aspect (3), a tape having a substantially Z-shaped cross section is preferable. More specifically, it has thin portions at both ends in the width direction, and has convex portions protruding in opposite directions (opposite directions) to each other in the thickness direction from the thin portions at both ends in the width direction. preferable.
Since this tape has a key-shaped part (key part) at both ends in the width direction, when winding, so as to engage the key parts of adjacent tapes, that is, the convex part of one tape and A tape layer in which the tapes are locked to each other can be obtained by wrapping around the concave portion constituted by the thin portion so as to fit the convex portion of the other tape.

FIG. 1C shows a cross section of an example of the tape of the aspect (3).
The tape 1c has a substantially Z-shaped cross section. Thin portions 5 are provided at both ends of the tape 1c in the width direction, and convex portions 4 that protrude from the two thin portions 5 in opposite directions (opposite directions) to each other in the thickness direction are provided.

The tape of the present invention is particularly preferably the tape of the above aspect (3).

The tape of the present invention can be produced by molding the fluororesin into a desired shape by a method such as extrusion molding or pultrusion molding together with the other components as required. Further, the fluororesin may be processed into a thread shape together with the other components as required, and a woven tape may be obtained by weaving it into a desired shape.

The width, thickness and length of the tape of the present invention can be appropriately set according to the application. When the tape of the present invention is applied to flexible tubes such as a riser tube through which a high-temperature fluid is circulated, for example, the width can be 1 mm to 10 m and the thickness can be 10 μm to 5 cm. The length may be determined according to the amount of tape used and the like, but when applied to flexible tubes through which a high-temperature fluid is circulated, the length can be about 1 m to 1000 km.

A laminate comprising the first layer, the second layer made of the tape of the present invention formed on the first layer, and the third layer formed on the second layer is also the present invention. It is one of. Since the second layer is made of the tape of the present invention, friction between the first layer and the third layer can be reduced. Moreover, even if it uses the said laminated body in a high temperature environment, mechanical strength does not fall easily. Further, when the laminate is applied to a flexible tube such as a riser tube through which a high-temperature fluid is circulated, the high-temperature fluid can be prevented from passing through the outer layer of the second layer. Corrosion of layers outside the layer can be prevented. In addition, a decrease in strength of the flexible tubes can be prevented.

The first layer and the third layer may be layers made of the same material or may be layers made of different materials. Examples of materials that can be used for the first layer and the third layer include metals, resins, and rubbers. Of these, metals are preferred. A reinforcing yarn may be used between the first layer and the third layer.

It is particularly preferable that the first layer and the third layer are both made of metal. In this aspect, since the friction between the first layer and the third layer is increased, the effect of reducing friction due to the presence of the second layer (the layer made of the tape) becomes remarkable. Further, since the metal is easily corroded by contact with a high-temperature fluid, the third layer corrosion prevention effect due to the presence of the second layer becomes remarkable.

In the second layer, the tape is preferably arranged so as to be adjacent in the width direction. Furthermore, it is preferable that the end portions in the width direction of the adjacent tapes are locked to each other. This aspect is realized, for example, by using the tape of the above aspect (3).
In the second layer, a plurality of the tapes may be laminated.

In the laminated body of this invention, other layers other than the said 1st layer, 2nd layer, and 3rd layer may further be provided. For example, another layer may be further provided on the surface of the first layer opposite to the second layer and / or on the surface of the third layer opposite to the second layer, depending on the application. .

The pipe comprising the laminate of the present invention described above is also one aspect of the present invention. In the pipe of the present invention, the first layer, the second layer, and the third layer each constitute a tubular body, the second layer is formed on the first layer, and the third layer is formed on the second layer. Is formed. FIG. 2 schematically shows an example of the configuration of the pipe of the present invention. The inner layer 11 in FIG. 2 corresponds to the first layer or the third layer, the intermediate layer 12 corresponds to the second layer, and the outer layer 13 corresponds to the third layer or the first layer.

In the pipe of the present invention, since the second layer which is an intermediate layer is made of the above-described tape of the present invention, the friction between the first layer and the third layer can be reduced. Moreover, even if the pipe is used in a high temperature environment, the mechanical strength is not easily lowered. Further, when the pipe is applied to a flexible pipe such as a riser pipe that allows a high-temperature fluid to circulate, the high-temperature fluid can be prevented from passing through the outer layer of the second layer. Corrosion of the outer layer can be prevented. In addition, a decrease in strength of the flexible tubes can be prevented.

In the pipe of the present invention, the tape layer made of resin (the second layer) has a higher heat insulating effect than the metal layer, so that the temperature drop inside the pipe (the portion inside the second layer) can be reduced. Can do. This is particularly effective when transporting materials whose viscosity suddenly increases due to a decrease in temperature and does not flow inside the pipe. The heat insulation effect can be further enhanced by creating a hollow portion in the tape by a method such as foaming.

In the pipe of the present invention, the first layer, the second layer, and the third layer are laminated in this order from the inside of the pipe, and the second layer is formed by winding the tape around the outer periphery of the first layer. It is preferable. As described above, when the intermediate layer (second layer) having the three-layer structure is a tape winding layer in which the tape is wound around the outer periphery of the inner layer (first layer), there is play between the tapes, so that the pipe is bent. Since the tape is not stretched, the physical properties and deformation of the tape layer do not occur when the pipe returns to its original state.

In the pipe of the present invention, the second layer is formed by winding the tape around the outer periphery of the first layer. Although the method of winding the said tape is not specifically limited, For example, the method of winding the said tape helically around the outer periphery of a 1st layer is preferable. FIG. 3 schematically shows an example of the method for winding the tape. The tape 14 (the tape of the present invention) is spirally wound around the outer periphery of the tubular inner layer 11 (first layer) in the direction of the arrow in the figure.

At the time of winding, the tape may be wound around the outer periphery of the first layer so that the widthwise ends of adjacent tapes do not overlap each other (see, for example, FIG. 4A). Further, the tape may be wound in the same manner by shifting the winding position so as to cover the boundary portion of the tape already wound around the outer periphery of the obtained tape winding layer (for example, see FIG. 4B). .) In this way, permeation of high-temperature fluid can be more reliably suppressed. In this case, the lower layer (inner layer side) tape and the upper layer (outer layer side) tape may be wound in the same direction, but winding in opposite directions balances the tension applied to the pipe during winding. Therefore, it is preferable because it is easy to wind.

Moreover, you may wind the said tape so that the width direction edge part of an adjacent tape may mutually overlap (for example, refer FIG.4 (c)). In this way, permeation of high-temperature fluid can be more reliably suppressed. Also in this aspect, the tape may be wound in a plurality of layers in the same direction or in the opposite direction.

Moreover, when the said tape has a thin part in the both ends of the width direction, it is preferable to wind so that the thin part of an adjacent tape may mutually overlap (refer FIG.4 (d)). In this way, permeation of high-temperature fluid can be more reliably suppressed. Moreover, the thickness of the tape winding layer obtained can be made uniform easily. Also in this aspect, the tape may be wound in a plurality of layers in the same direction or in the opposite direction.

Moreover, when the said tape has a shape which can mutually lock, it is preferable to wind so that the edge part of the width direction of an adjacent tape may engage (for example, refer FIG.4 (e)). In this way, it is possible to obtain a tape winding layer in which the tapes are locked to each other. Therefore, when the pipe is bent or twisted, the deviation of the tape can be prevented. As a result, permeation of high-temperature fluid can be more reliably suppressed. Moreover, the thickness of the tape winding layer obtained can be made uniform easily. Also in this aspect, the tape may be wound in a plurality of layers in the same direction or in the opposite direction.

The tape may be wound using a known tape winding device.

In the said 2nd layer, it is preferable that the edge parts of the width direction of the said adjacent tape are mutually locked. This aspect is realized by, for example, winding the tape of the aspect (3) around the outer periphery of the first layer so as to engage the end portions in the width direction of adjacent tapes.

The third layer can be formed by coating the outer periphery of the second layer with a necessary material by a known method, for example.

The pipe of the present invention further includes a flexible tube, the first layer is formed on the outer periphery of the tube, and the second layer winds the tape around the outer periphery of the first layer. It is preferable that the third layer is formed on the outer periphery of the second layer. FIG. 5 schematically shows an example of the configuration of the pipe according to this aspect. The pipe 20 includes an innermost layer 21 (the flexible tubular body), a first reinforcing layer 22 (the first layer), a second reinforcing layer 23 (the second layer), and a third reinforcing layer in order from the inner layer side. 24 (the third layer) is laminated.
In this aspect, since the laminated body having the three-layer structure including the first layer, the second layer, and the third layer described above is provided on the outer layer side of the flexible tubular body, the tubular body is reinforced. Can do. In particular, if the first layer and the third layer are made of metal, the tubular body can be more sufficiently reinforced. Moreover, since the said 2nd layer consists of the tape of this invention mentioned above, the friction with a 1st layer and a 3rd layer can be reduced. In addition, even when a high-temperature fluid is circulated through the pipe body, the permeation of the high-temperature fluid from the second layer to the third layer can be suppressed, and corrosion of the third layer can be prevented. it can. In addition, a decrease in the reinforcing effect of the tubular body can be prevented even under high temperature conditions.

The flexible tube may have a single layer structure or a multilayer structure. The method for producing the multilayer structure is not particularly limited, but known sequential extrusion molding, coextrusion molding, and the like are preferable.
Moreover, the material for constructing the tubular body is not particularly limited as long as it can impart flexibility to the tubular body. For example, known materials used for various flexible tubes are used for the purpose. Can be selected accordingly.

In the pipe of the present invention, another layer may be provided on the outer periphery of the third layer depending on the application.

Since the pipe of the present invention has the above-described excellent characteristics, for example, a flexible metal tube described in JP-A-7-276523, and a high-temperature fluid described in JP-A-66-1485 It can be suitably used for a transport pipe, a multilayer flexible pipe described in US Patent Application Publication No. 2008/0314471, and the like.

The riser pipe and flow line provided with the pipe of the present invention described above are also one aspect of the present invention. The riser pipe and the flow line can be suitably used as a riser pipe and a flow line for transporting materials from the sea floor to the sea surface in a seabed oil field or gas field. Examples of materials include fluids such as crude oil, petroleum gas, and natural gas.

One embodiment of the riser pipe (or flow line) of the present invention is illustrated in FIG. However, the riser pipe and the flow line of the present invention are not limited to this.

The trunk (carcass) 31 is disposed as the innermost layer, and even when the riser pipe (or flow line) 30 is used in the deep sea, it can withstand high pressure and maintain the pipe shape. A fluid barrier layer 32 is disposed on the outer periphery of the body 31. The fluid barrier layer 32 is usually a layer formed from a resin, and prevents materials flowing through the riser pipe (or flow line) from leaking to the outside.

A reinforcing layer 33 and a reinforcing layer 35 are disposed on the outer periphery of the fluid barrier layer 32, and a friction-resistant layer 34 is disposed between the reinforcing layer 33 and the reinforcing layer 35 to prevent friction. The reinforcing layers 33 and 35 are layers corresponding to the first layer and the third layer described above, and have an action of preventing the riser pipe (or flow line) from being ruptured by the pressure of the material flowing inside. These reinforcing layers may be made of metal. If the reinforcing layers 33 and 35 have different structures, they can withstand stress acting in different directions. The friction-resistant layer 34 is a layer formed by winding the tape of the present invention around the outer periphery of the reinforcing layer 33, and has an action of reducing friction between the reinforcing layer 33 and the reinforcing layer 35. In addition, since the tape of the present invention is excellent in low permeability even in a high temperature environment, the presence of the friction-resistant layer 34 causes a high-temperature fluid (material flowing through the riser pipe (or flow line)) to the reinforcing layer 35. Permeation can be suppressed, and as a result, corrosion of the reinforcing layer 35 can be prevented. In addition, since the tape of the present invention is excellent in mechanical strength even in a high temperature environment, it is possible to suppress a decrease in strength of the friction-resistant layer 34, and as a result, prevent a decrease in strength of the entire riser pipe (or flow line). can do.

A thermoplastic resin layer may be provided between the fluid barrier layer 32 and the body 31 or the reinforcement layer 33 in order to prevent damage to the fluid barrier layer 32 that may occur due to contact with the metal reinforcement layer. The outer layer resin 36 is located on the outer periphery of the reinforcing layer 35 and has a function of partitioning the inside and outside of the riser pipe (or flow line). The outer layer resin 36 can be formed from polyethylene or polyamide.

In addition to the reinforcing layer 33 and the reinforcing layer 35, a metal reinforcing layer may be provided. As a result, when metal layers are adjacent to each other, a friction-resistant layer made of the tape of the present invention may be interposed between the adjacent layers. Thereby, the same effect as the friction-resistant layer 34 can be obtained.

The tape of the present invention can be used in applications other than riser pipes and flow lines, for example, to form a friction-resistant layer for fluid transfer metal piping of crude oil or natural gas, regardless of whether it is underground, above ground, or under the sea. It can also be suitably used as a tape. Crude oil and natural gas contain carbon dioxide and hydrogen sulfide, which cause corrosion of metal pipes, which can be used as a barrier to suppress metal pipe corrosion and reduce fluid friction of high-viscosity crude oil. You can also. When used in the above applications, in order to further improve the rigidity and strength of the tape of the present invention, it may be filled with glass fiber, carbon fiber, aramid resin, mica, silica, talc, celite, clay, titanium oxide, etc. Good. Moreover, in order to make it adhere | attach with a metal, you may perform the process which uses an adhesive agent or roughens a metal surface. Further, the tape of the present invention is a high temperature part around an automobile engine, or a part where chemical resistance is required, for example, an engine body of a car engine, a main motion system, a valve system, a lubrication / cooling system, a fuel system. , Intake / exhaust systems, drive system transmission systems, chassis steering systems, brake systems, etc., electrical equipment basic electrical parts, control system electrical parts, equipment electrical parts, etc., heat resistance, oil resistance, fuel oil resistance -Seals, bellows, diaphragms, etc. that require LLC resistance and steam resistance, non-contact type and contact type packings (self-seal packing, piston ring, split ring type packing, mechanical seal, oil seal, etc.) It has suitable characteristics as a hose, tube, electric wire or the like. In addition to automobiles, for example, oil, chemical, heat, steam, or weather resistant packings, O-rings, hoses, other sealing materials, diaphragms, valves, chemicals, etc. Similar packings in plants, O-rings, seals, diaphragms, valves, hoses, rolls, tubes, chemical coatings, linings, similar packings in food plant equipment and food equipment (including household products), O- Rings, hoses, sealing materials, belts, diaphragms, valves, rolls, tubes, similar packings in nuclear power plant equipment, O-rings, hoses, sealing materials, diaphragms, valves, tubes, similar packings in general industrial parts, O-ring, hose, sealing material, diaphragm, bar Bed, roll, tube, lining, mandrels, electric wires, flexible joints, belts, rubber plates, weather strips, is suitable for application to a roll blade or the like of the PPC copying machine. In addition, since the tape of the present invention has chemical resistance, low elution and low fragrance, in the medical and chemical fields, oil-resistant, chemical-resistant, heat-resistant, steam-resistant or weather-resistant sealing materials, lid materials, Applicable to belts, rolls, hoses, tubes, films, coatings, linings, joints, containers, etc.

The tape of the present invention can also be used for the following applications.
To prevent underwater organisms from adhering to and breeding on underwater structures (ships, buoys, port facilities, offshore oilfield facilities, power plant cooling water channels, factory cooling water channels, water floating channels, etc.) , Aquatic organism adhesion prevention tape.
Tape used for various members such as optical devices, products made of film, resin, glass, metal, etc.
Tape that is attached (further removed) for fixing wafers, etc. in semiconductor processes, for semiconductor back grinding, for semiconductor dicing, for dicing semiconductor packages, glass, ceramics, etc., and for protecting circuit surfaces during these processes.
Tape for fixing components of electronic and optical components such as mobile terminal devices such as mobile phones and PDAs, digital cameras and digital video cameras.
Paint masking tape.
Tapes used for portable electronic devices such as notebook computers, electronic dictionaries, PDAs, mobile phones, portable game devices, and portable music players.
Liquid crystal display, transmissive liquid crystal display device, reflective LCD panel, plasma display, SED, LED, organic EL, inorganic EL, liquid crystal projector, rear projector, liquid crystal panel, backlight device (variation prevention, temperature unevenness improvement), TFT substrate Tapes used for optical and display devices and parts thereof, such as electron emission devices, composites of electron source substrates, face plates (weight reduction) and display panel frames, light emitting devices, charge injection light emitting devices, watches, etc.
Tape used for light emitting / illuminating devices such as lasers, semiconductor lasers, light emitting diodes, fluorescent lamps, incandescent bulbs, light emitting dots, issuing element arrays, lighting units, flat light emitting devices, and document lighting devices.
Single or multiple recording head (heater, heat insulating material, heat storage layer, etc.) for ink jet (ink ejecting ink using thermal energy), line head, long ink head, solid ink jet device, heat sink for ink jet head Ink jet printer (ink head) devices such as ink cartridges, ink jet head silicon substrates, ink jet drive drivers, and heat sources (halogen lamp heaters) for heating ink jet recording paper, and tapes used for parts thereof.
Toner cartridge, device having laser light source, scanning optical device (light emitting unit, deflection scanning polygon mirror, polygon mirror rotation driving motor, optical component leading to photosensitive drum), exposure device, developing device (photosensitive drum, light receiving member, Development roller, development sleeve, cleaning device), transfer device (transfer roll, transfer belt, intermediate transfer belt, etc.), fixing device (fixing roll (core, outer peripheral member, halogen heater, etc.), surf heater, electromagnetic induction heater, ceramic Electrophotographic equipment consisting of heater, fixing film, film heating device, heating roller, pressure roller / heating body, pressure member, belt nip), sheet cooling device, sheet placement device, sheet discharge device, sheet processing device, etc. Tape used for image forming apparatus and its parts.
Tape used for other recording devices such as thermal transfer recording devices (ribbons), dot printers, and sublimation printers.
Tape used for semiconductor-related parts such as semiconductor elements, semiconductor packages, semiconductor sealing cases, semiconductor die bonding, liquid crystal display element driving semiconductor chips, CPUs, MPUs, memories, power transistors, power transistor cases, and the like.
Printed circuit board, rigid wiring board, flexible wiring board, ceramic wiring board, build-up wiring board, mounting board, high-density mounting printed circuit board, (tape carrier package), TAB, hinge mechanism, sliding mechanism, through hole, resin packaging , Tape used for wiring boards such as sealing materials, multilayer resin moldings, and multilayer boards.
CD, DVD (optical pickup, laser generator, laser receiver), Blu-ray disc, DRAM, flash memory, hard disk drive, optical recording / reproducing device, magnetic recording / reproducing device, magneto-optical recording / reproducing device, information recording medium, optical recording disc , Magneto-optical recording medium (translucent substrate, optical interference layer, domain wall motion layer, intermediate layer, recording layer, protective layer, heat dissipation layer, information track), light receiving element, light detecting element, optical pickup device, magnetic head, light Tape used for recording devices, recording / reproducing devices, and parts thereof, such as magnetic heads for magnetic recording, semiconductor laser chips, laser diodes, and laser drive ICs.
Digital camera, analog camera, digital single-lens reflex camera, analog single-lens reflex camera, digital camera, digital video camera, camera-integrated VTR, camera-integrated VTR IC, video camera light, electronic flash device, imaging device, imaging tube cooling Apparatus, imaging apparatus, imaging element, CCD element, lens barrel, image sensor and information processing apparatus using the same, X-ray absorber pattern, X-ray mask structure, X-ray imaging apparatus, X-ray exposure apparatus, X-ray Flat detector, X-ray digital imaging device, X-ray area sensor substrate, electron microscope sample cooling holder, electron beam drawing device (electron gun, electron gun, electron beam drawing device), radiation detection device and radiation imaging system, scanner, For image reading devices, moving image pickup devices and still image pickup devices, image recording devices such as microscopes, and parts thereof Tape to use.
Primary batteries such as alkaline batteries and manganese batteries, secondary batteries such as lithium ion batteries, nickel metal hydride and lead storage batteries, electric double layer capacitors, electrolytic capacitors, assembled batteries, solar cells, solar cell module installation structures, photoelectric conversion substrates, Tape used for heat-dissipating materials for battery devices such as photovoltaic element arrays, power generation elements, and fuel cells (power generation cells, housing exterior, fuel tank interior).
Tape used for power supplies and parts such as power supplies (rectifier diodes, transformers), DC / DC converters, switching power supplies (forward type), current leads, superconducting device systems, etc.
Tape used for motors and parts such as motors, linear motors, planar motors, vibration wave motors, motor coils, circuit units for rotation control drive, motor drivers, inner rotor motors, vibration wave actuators, etc.
Vacuum processing equipment, semiconductor manufacturing equipment, vapor deposition equipment, thin film single crystal semiconductor layer manufacturing equipment, plasma CVD, microwave plasma CVD, sputtering equipment, vacuum chambers, vacuum pumps, vacuum pumps, cryotraps, cryopumps, etc., electrostatic chucks , Vacuum vacuum chuck, pin chuck type wafer chuck, sputtering target, semiconductor exposure device, lens holding device and projection exposure device, photomask, etc., deposition film manufacturing equipment (constant temperature, quality stable) and tape used for its parts .
Heat treatment equipment by resistance heating / induction heating / infrared heating, dryer, annealing equipment, laminating equipment, reflow equipment, heat bonding (crimping) equipment, injection molding equipment (nozzles / heating section), resin molding dies, LIM molding, rollers Molding equipment reformed gas production (reforming part, catalyst part, heating part, etc.) stamper, (film, roll, recording medium), bonding tool, catalyst reactor, chiller, color filter substrate coloring device, resist Tape used for various manufacturing equipment and parts such as heating / cooling equipment, welding equipment, magnetic induction heating film, anti-condensation glass, liquid remaining amount detection equipment, heat exchange equipment, etc.
Tape used for heat insulation devices such as heat insulation materials, vacuum heat insulation materials, and radiation heat insulation materials.
Tape used for chassis, housing, and exterior cover of various electronic and electrical equipment and manufacturing equipment.
Tape used for heat dissipation parts such as radiators, openings, heat pipes, heat sinks, fins, fans, and heat dissipation connectors.
Tape used for cooling parts such as Peltier elements, electrothermal conversion elements, and water-cooled parts.
Tape used for temperature control device, temperature control device, temperature detection device and parts.
Used for heating element-related parts such as thermistors, thermoswitches, thermostats, thermal fuses, overvoltage protection elements, thermoprotectors, ceramic heaters, flexible heaters, composites of heaters, heat conduction plates and insulation, heater connectors, electrode terminal parts, etc. tape.
Tape used for electromagnetic shielding parts such as radiation parts with high emissivity, electromagnetic shielding, and electromagnetic wave absorbers.
Tape used for manufacturing portable electronic devices such as smartphones and tablet computers, and fixing image display modules such as liquid crystal display modules and organic EL modules.
Manufacture of electronic electronic devices such as electronic notebooks, mobile phones, PHS, digital cameras, music players, TVs, notebook computers, smartphones, tablet computers, game consoles, wall-mounted TVs and monitors, personal computers, etc. Tape used for the scene.
Tape used for fixing image display modules such as protective panels for portable electronic devices such as smartphones and tablet computers, liquid crystal display modules with glass on the surface layer, and organic EL modules.
Tape used for bonding the protective panel and the image display module, and fixing the image display module to a flat housing or support having a pasted portion (because of excellent adhesion between rigid members).

The laminate of the present invention can also be applied to piping. In this case, the pipe made of the laminate can be manufactured by a normal method and is not particularly limited. Moreover, a corrugated tube is also contained in the said piping.

The use of the tape, laminate, pipe, riser pipe or flow line in a high temperature environment is also one aspect of the present invention.

Next, the present invention will be described with reference to examples. However, the present invention is not limited to such examples.

Example 1
Tetrafluoroethylene (TFE) / vinylidene fluoride (VDF) / CH ₂ = CHCF ₂ formed to have a width of 10 cm and a thickness of 2 mm on the outside of a metal structure (tubular body) formed by spirally winding a metal material A fluororesin tape of CF ₂ CF ₂ CF ₂ CF ₂ CF ₃ : 60.1 / 39.6 / 0.3 (mol%) was spirally wound to form an inner metal layer and a tape layer. A metal material was spirally wound around the outside of the tape layer to obtain a three-layer structure. Even when the structure was bent a plurality of times in a high temperature environment, the tape portion was not displaced and the metal layers were not rubbed.

1a, 1b, 1c: Tape 2: Central part 3: Thin part 4: Convex part 5: Thin part 10: Pipe 11: Inner layer 12: Intermediate layer 13: Outer layer 14, 15, 16: Tape 20: Pipe 21: Innermost layer 22: 1st reinforcement layer 23: 2nd reinforcement layer 24: 3rd reinforcement layer 30: Riser pipe or flow line 31: Body (carcass)
32: Fluid barrier layer 33: Reinforcing layer 34: Friction resistant layer 35: Reinforcing layer 36: Outer layer resin

Claims (11)

A tape made of fluororesin,
The fluororesin is a copolymer containing copolymerized units of tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer (excluding tetrafluoroethylene and vinylidene fluoride), and A tape having a storage elastic modulus (E ′) at 170 ° C. of 60 to 400 MPa as measured by dynamic viscoelasticity. The fluororesin is
55.0-90.0 mol% tetrafluoroethylene,
5.0-44.9 mol% vinylidene fluoride, and
0.1 to 10.0 mol% of an ethylenically unsaturated monomer represented by the formula (1),
The tape according to claim 1, wherein the tape comprises a copolymer unit.
Formula (1): CX ¹ X ² = CX ³ (CF ₂ ) _n X ⁴
(In the formula, X ¹ , X ² , X ³ and X ⁴ are the same or different and represent H, F or Cl, and n represents an integer of 0 to 8, except for tetrafluoroethylene and vinylidene fluoride. ) The fluororesin is
55.0-90.0 mol% tetrafluoroethylene,
9.2-44.2 mol% vinylidene fluoride, and
0.1 to 0.8 mol% of an ethylenically unsaturated monomer represented by the formula (2),
The tape according to claim 1, wherein the tape comprises a copolymer unit.
Formula (2): CF ₂ = CF-ORf ¹
(In the formula, Rf ¹ represents an alkyl group having 1 to 3 carbon atoms or a fluoroalkyl group having 1 to 3 carbon atoms.) The fluororesin is
55.0-90.0 mol% tetrafluoroethylene,
5.0-44.8 mol% vinylidene fluoride,
0.1 to 10.0 mol% of an ethylenically unsaturated monomer represented by the formula (1), and
0.1 to 0.8 mol% of an ethylenically unsaturated monomer represented by the formula (2),
The tape according to claim 1, wherein the tape comprises a copolymer unit.
Formula (1): CX ¹ X ² = CX ³ (CF ₂ ) _n X ⁴
(In the formula, X ¹ , X ² , X ³ and X ⁴ are the same or different and represent H, F or Cl, and n represents an integer of 0 to 8, except for tetrafluoroethylene and vinylidene fluoride. )
Formula (2): CF ₂ = CF-ORf ¹
(In the formula, Rf ¹ represents an alkyl group having 1 to 3 carbon atoms or a fluoroalkyl group having 1 to 3 carbon atoms.) The tape according to claim 1, 2, 3, or 4, wherein the tape is a belt-like body that can be wound up. The first layer;
A second layer comprising the tape of claim 1, 2, 3, 4 or 5 formed on the first layer;
A laminate comprising a third layer formed on the second layer. The laminate according to claim 6, wherein the first layer and the third layer are layers made of metal. A pipe comprising the laminate according to claim 6 or 7. The first layer, the second layer, and the third layer are laminated in this order from the inside of the pipe,
The pipe according to claim 8, wherein the second layer is formed by winding the tape around an outer periphery of the first layer. Furthermore, it has a flexible tube,
The first layer is formed on an outer periphery of the tube;
The second layer is formed by winding the tape around the outer periphery of the first layer,
The pipe according to claim 8 or 9, wherein the third layer is formed on an outer periphery of the second layer. A riser pipe comprising the pipe according to claim 8, 9 or 10.

Images