Fiber-reinforced polymer tape for forming reinforcing layer of high-pressure-resistant pipe and high-pressure-resistant pipe having reinforcing layer formed therefrom

Abstract

The present invention relates to a fiber-reinforced polymer tape for forming a reinforcing layer of a high-pressure-resistant pipe, and a high-pressure-resistant pipe having a reinforcing layer formed therefrom. In particular, the present invention relates to: a fiber-reinforced polymer tape capable of improving the flexibility and bendability of a high-pressure-resistant pipe which transports various fluids under high pressure, and simultaneously implementing excellent pressure-resistant characteristics; and a high-pressure-resistant pipe having a reinforcing layer formed therefrom.

Description

Fiber-reinforced polymer tape for forming a reinforcing layer of high-pressure pipe and high-pressure pipe having a reinforcing layer formed therefrom

[0001] The present invention relates to a fiber-reinforced polymer tape for forming a reinforcing layer of a high-pressure pipe, and to a high-pressure pipe having a reinforcing layer formed therefrom. Specifically, the present invention relates to a fiber-reinforced polymer tape capable of improving the flexibility and flexibility of a high-pressure pipe that transports various fluids at high pressures while simultaneously implementing excellent pressure-resistant characteristics, and to a high-pressure pipe having a reinforcing layer formed therefrom.

[0002] Pipes that transport high-pressure fluids such as oil and gas, as well as high-pressure hydrogen, carbon dioxide, and ammonia, can be made of metal or plastic depending on the required characteristics and usage environment.

[0003] Here, plastic pipe has the advantage of being able to reduce the number of connections when installing over long distances because it has superior flexibility and bendability compared to metal pipe and can be wound around a bobbin, but has the problem of insufficient high-pressure resistance required to transport high-pressure fluid.

[0004] Therefore, the high-pressure pipe applies a separate reinforcing layer to maintain high pressure characteristics, and the reinforcing layer can be made of a fiber-reinforced polymer composite material in which reinforcing fiber filaments are impregnated into a polymer resin.

[0005] However, conventional fiber-reinforced polymer composite materials for forming a reinforcing layer of high-pressure pipes have the problem of significantly reducing the flexibility and bendability of the pipes and not sufficiently improving the pressure-resistant characteristics.

[0006] Therefore, there is an urgent need for a material for forming a reinforcing layer that can improve the flexibility and bendability of high-pressure pipes while simultaneously implementing excellent pressure-resistant characteristics, and a high-pressure pipe having a reinforcing layer formed therefrom.

[0007] The purpose of the present invention is to provide a high-pressure pipe having a fiber-reinforced polymer tape and a reinforcing layer formed therefrom, which can improve the flexibility and bendability of a high-pressure pipe that transports various fluids at high pressure while simultaneously implementing excellent pressure-resistant characteristics.

[0008] In order to solve the above problem, the present invention,

[0009] A fiber-reinforced polymer tape is provided, wherein a plurality of filament yarns in which a plurality of reinforcing fiber filaments are twisted are impregnated in a polymer resin, and the filament yarns have a tex of 50 to 4,000 and a twist count (TPM) of 30 to 200.

[0010] Here, the filament yarn provides a fiber-reinforced polymer tape characterized by having an elastic recovery rate of 60% or more as defined by the following mathematical formula 1.

[0011] [Mathematical Formula 1]

[0012]

[0013] In the above mathematical expression 1, the elastic modulus measured after 2% elongation means the elastic modulus measured after 1 minute of elongation of the filament yarn at 2% elongation for 30 seconds.

[0014] In addition, the above filament yarn provides a fiber-reinforced polymer tape characterized by a tensile strength of 500 MPa or more, an elongation of 1% or more, and an elastic modulus of 30 GPa or more.

[0015] And, a fiber-reinforced polymer tape is provided, characterized in that the plurality of filament yarns are all oriented in the same direction.

[0016] Furthermore, a fiber-reinforced polymer tape is provided, characterized in that the total content of the plurality of filament yarns is 30 to 90 wt% based on the total weight of the fiber-reinforced polymer tape.

[0017] In addition, the fiber-reinforced polymer tape is provided, characterized in that the polymer resin comprises at least one polymer resin selected from the group consisting of ultra-high molecular weight polyethylene (UHMWPE), high-density polyethylene (HDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), polypropylene (PP), ethylene-propylene rubber (EPDM), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile-butadiene rubber (NBR), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), fluorocarbon rubber (FKM), silicone rubber, polyvinyl chloride (PVC), maleic anhydride-grafted polyolefin, ethylene vinyl alcohol (EVOH), polyamide (PA11, PA12), polyethylene teraphthalate (PET), and polybutylene teraphthalate (PBT).

[0018] And, the fiber-reinforced polymer tape is provided, characterized in that the reinforcing fiber filament comprises at least one reinforcing fiber filament selected from the group consisting of carbon fiber, aramid fiber, glass fiber, metal fiber, ultra-high molecular weight polyethylene fiber, nylon fiber, and basalt fiber.

[0019] Meanwhile, a high-pressure pipe is provided, comprising a tube-shaped liner having a hydrogen transport path formed therein; and a reinforcing layer formed on the outer surface of the liner and formed by transverse winding of the fiber-reinforced polymer tape of claim 1 or claim 2.

[0020] Here, a high-pressure pipe is provided, characterized in that the reinforcing layer is formed of two or more layers, and the transverse winding directions of fiber-reinforced polymer tapes forming each adjacent layer among the two or more layers are different from each other.

[0021] In addition, a high-pressure pipe is provided, characterized in that it additionally includes a sheath layer surrounding the reinforcing layer.

[0022] The fiber-reinforced polymer tape for forming a reinforcing layer of a high-pressure pipe according to the present invention exhibits an excellent effect of improving the flexibility and bendability of the pipe while simultaneously implementing excellent pressure-resistant characteristics through a combination of new structures and materials.

[0023] Figure 1 schematically illustrates one embodiment of the structure of a fiber-reinforced polymer tape according to the present invention.

[0024] FIG. 2 schematically illustrates one embodiment of a high-pressure pipe having a reinforcing layer formed by a fiber-reinforced polymer tape according to the present invention.

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosure is thorough and complete, and to sufficiently convey the spirit of the present invention to those skilled in the art. Like reference numbers designate like elements throughout the specification.

[0026] FIG. 1 schematically illustrates one embodiment of the structure of a fiber-reinforced polymer tape according to the present invention. Specifically, FIG. 1a relates to the cross-sectional structure of the fiber-reinforced polymer tape, and FIG. 1b relates to the cross-section of a filament yarn included in the fiber-reinforced polymer tape.

[0027] As illustrated in FIG. 1, the fiber-reinforced polymer tape according to the present invention can be formed by impregnating a polymer resin (301) with a filament yarn (302) in which a plurality of reinforcing fiber filaments (302a) are twisted in a row.

[0028] In particular, the filament yarns (302) impregnated in the polymer resin (301) can all be oriented in the same direction, for example, by being oriented in the same direction as the longitudinal direction of the tape, sufficient reinforcement and pressure-resistant improvement effects can be achieved.

[0029] Here, the polymer resin may include at least one polymer resin selected from the group consisting of ultra-high molecular weight polyethylene (UHMWPE), high-density polyethylene (HDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), polypropylene (PP), ethylene-propylene rubber (EPDM), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile-butadiene rubber (NBR), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), fluorocarbon rubber (FKM), silicone rubber, polyvinyl chloride (PVC), maleic anhydride-grafted polyolefin, ethylene vinyl alcohol (EVOH), polyamide (PA11, PA12), polyethylene teraphthalate (PET), polybutylene teraphthalate (PBT), etc.

[0030] In addition, the reinforcing fiber filament (302a) may include at least one reinforcing fiber filament selected from the group consisting of carbon fiber, aramid fiber, glass fiber, metal fiber, ultra-high molecular weight polyethylene fiber, nylon fiber, basalt fiber, etc., and may preferably include aramid fiber.

[0031] The above filament yarn (302) may have a tex of 50 to 4,000, preferably 50 to 2,000. Here, tex refers to the number of grams of a filament yarn having a length of 1 km. If the tex of the filament yarn (302) is less than 50, the outer diameter of the filament yarn is reduced, which inevitably leads to a decrease in pressure-resistant performance. In addition, in order to secure sufficient pressure-resistant performance, a fiber-reinforced polymer tape must be formed in multiple layers when forming a reinforcing layer of the pipe, which may cause problems such as an increase in the manufacturing cost of the pipe and a decrease in productivity.

[0032] Meanwhile, in order to secure sufficient pressure resistance, if a larger number of filament yarns are arranged within the polymer resin instead of forming the fiber-reinforced polymer tape in multiple layers, this means that the contact area between the entire filament yarn and the polymer resin surrounding it increases, thereby reducing the flexibility of the fiber-reinforced polymer tape, and consequently reducing the flexibility of the pipe to which the reinforcing layer formed of the fiber-reinforced polymer tape is applied.

[0033] In addition, when the tex of the filament yarn (302) exceeds 4,000, sufficient pressure resistance performance and flexibility can be secured, but there is a problem in that the outer diameter of the filament yarn (302) increases, and thus the thickness of the fiber-reinforced polymer tape increases, and thus the outer diameter of the high-pressure pipe increases.

[0034] In addition, the filament yarn (302) is formed by combining multiple reinforcing fiber filaments that are twisted together, and the number of turns (TPM) of the multiple reinforcing fiber filaments can affect the flexibility and pressure-resistant characteristics of the pipe. The number of turns of the filament yarn (302) can generally be expressed as TPM (turns per meter), that is, the number of turns of the reinforcing fiber filament per unit length of 1 m. Here, the number of turns of the reinforcing fiber filament means the number of times that a random position in the reinforcing fiber filament returns to its original position by twisting.

[0035] The twist count (TPM) of the filament yarn (302) may be 30 or more, for example, 30 to 200, preferably 40 to 150. When the twist count (TPM) of the filament yarn (302) is less than 30, a large number of voids exist between the reinforcing fiber filaments inside the filament yarn (302), which causes a problem of forming air bubbles inside the tape when manufacturing a fiber-reinforced polymer tape, and when a vacuum device is installed to improve this, there is a problem of increasing manufacturing costs.

[0036] In addition, when the polymer resin (301) penetrates into the voids inside the filament yarn (302) during the manufacture of the fiber-reinforced polymer tape, the flexibility of the fiber-reinforced polymer tape may be significantly reduced.

[0037] Meanwhile, when the twist number of the filament yarn (302) exceeds 150, the twisting workability of the reinforcing fiber filament is reduced, and when the reinforcing fiber filament is twisted, friction and stress between the reinforcing fiber filaments increase, which may reduce the long-term reliability of the reinforcing fiber filament and the filament yarn (302) including the reinforcing fiber filament.

[0038] Accordingly, the filament yarn (302) can implement sufficient pressure resistance characteristics by possessing mechanical properties such as a tensile strength of 500 MPa or more, preferably 1,000 MPa or more, an elongation of 1% or more, preferably 1.5% or more, and an elastic modulus of 30 GPa or more, preferably 50 GPa or more.

[0039] In particular, high-pressure pipes are repeatedly wound and unwound on bobbins during storage, transportation, and installation processes. During these processes, the fiber-reinforced polymer tape and filament yarn forming the reinforcing layer of the high-pressure pipe are subjected to tension and compression in the longitudinal direction. The elastic recovery rate, which is defined by the following mathematical formula 1 and is a characteristic that allows the pipe to return to its original state after the tension and compression are removed, may be 60% or more.

[0040] [Mathematical Formula 1]

[0041]

[0042] In the above mathematical expression 1, the elastic modulus measured after 2% elongation means the elastic modulus measured after 1 minute of elongation of the filament yarn at 2% elongation for 30 seconds.

[0043] Here, if the elastic recovery rate (%) of the filament yarn (302) is less than 60%, it means that the elasticity is lost due to tension and extrusion of the filament yarn (302), which means that the mechanical properties of the filament yarn are deteriorated, and this may result in a deterioration of the pressure resistance of the pipe.

[0044] In addition, the fiber-reinforced polymer tape may have a thickness of 0.3 to 3 mm. Here, when the thickness of the fiber-reinforced polymer tape is less than 0.3 mm, a filament yarn (302) having an outer diameter of less than 0.3 mm must be used, and in this case, the contact area between the polymer resin (301) and the filament yarn (302) increases, which may cause a problem in that the flexibility of the fiber-reinforced polymer tape is reduced. On the other hand, when the thickness of the fiber-reinforced polymer tape exceeds 3 mm, a problem in that the tape is bent or curved may occur during the manufacturing process.

[0045] And, based on the total weight of the fiber-reinforced polymer tape, the total weight of the filament yarn (302) may be 30 to 90 wt%. Here, when the total weight of the filament yarn (302) is less than 30 wt%, the strength of the filament yarn (302) may be insufficient, whereas when the total weight of the filament yarn (302) is more than 90 wt%, it may be difficult to achieve firm fusion between the liner and the reinforcing layer formed by the fiber-reinforced polymer tape during pipe manufacturing, and the taping workability for forming the reinforcing layer may be reduced.

[0046] FIG. 2 schematically illustrates one embodiment of a high-pressure pipe having a reinforcing layer formed by a fiber-reinforced polymer tape according to the present invention.

[0047] As illustrated in FIG. 2, the high-pressure pipe may include a liner (100), which is a tube-shaped pipe body in which a hydrogen transport path is formed inside, a first reinforcing layer (200) formed on the outer surface of the liner (100), a second reinforcing layer (300) formed on the outer surface of the first reinforcing layer (200), a third reinforcing layer (400) formed on the outer surface of the second reinforcing layer (300), a jacket (500) formed on the outer surface of the third reinforcing layer (400), etc.

[0048] Here, the first reinforcing layer (200) performs a function of uniformly distributing the pressure applied to the liner (100) and transmitting it to the second reinforcing layer (300) and the third reinforcing layer (400), and the second reinforcing layer (300) and the third reinforcing layer (400) can perform a function of improving strength and bending characteristics.

[0049] The above liner (100) may be formed in a tube shape in which a path for transporting fluid is formed inside, and may be formed of a metal material such as carbon steel, stainless steel, aluminum, or a plastic material, although it is not particularly limited thereto.

[0050] In addition, the first reinforcing layer (200) may be formed by transverse winding of a fiber-reinforced polymer tape in which reinforcing fiber filaments are impregnated in a polymer resin, and the second reinforcing layer (300) and the third reinforcing layer (400) may each be formed by transverse winding of a fiber-reinforced polymer tape according to the present invention.

[0051] Specifically, heat is applied through a hot air blower or the like during the transverse winding of the fiber-reinforced polymer tape, and after the transverse winding is completed, heat is applied through an IR heater or the like so that the polymer resin forming the fiber-reinforced polymer tape is partially melted, thereby allowing it to be firmly fused to the lower liner (100) or the reinforcing layer.

[0052] Furthermore, the transverse winding of the fiber-reinforced polymer tape may preferably be performed as a wrap winding so as to overlap by 5% or less based on the width of the fiber-reinforced polymer tape, or may be performed as a gap winding so as to form a gap of 3 mm or less.

[0053] Here, if the overlap ratio in the above-mentioned lap winding exceeds 5%, not only may the appearance of the pipe become uneven, but the bending characteristics of the pipe may also deteriorate, and if the gap in the above-mentioned gap winding exceeds 3 mm, the reinforcing characteristics of the reinforcing layer may be insufficient.

[0054] The above first reinforcing layer (200) can be formed by aligning reinforcing fiber filaments in a single row within a polymer resin, unlike the above second reinforcing layer (300) and the above third reinforcing layer (400), without forming filament yarns, and can be formed in two or more layers.

[0055] When the first reinforcing layer (200) is formed in two or more layers, the transverse winding directions of the fiber-reinforced polymer tapes forming each layer in adjacent layers may be different from each other. For example, when the fiber-reinforced polymer tape forming the lower reinforcing layer disposed at the lower part of the first reinforcing layer (200) is wound in the S direction, the fiber-reinforced polymer tape forming the upper reinforcing layer wound on the lower reinforcing layer is wound in the Z direction, and when the fiber-reinforced polymer tape forming the lower reinforcing layer is wound in the Z direction, the fiber-reinforced polymer tape forming the upper reinforcing layer is wound in the S direction. As a result, the bending characteristics of the high-pressure pipe can be further improved.

[0056] In addition, the transverse winding angle (θ) of the fiber-reinforced polymer tape forming the first reinforcing layer (200), i.e. the angle at which the fiber-reinforced polymer tape is inclined with respect to the central axis of the high-pressure pipe, may be 60° or more and less than 90°. Here, when the transverse winding angle (θ) is less than 60°, the reinforcing characteristics of the first reinforcing layer (200) may be insufficient.

[0057] Meanwhile, the transverse winding directions of the fiber-reinforced polymer tapes forming each of the second reinforcing layer (300) and the third reinforcing layer (400) are different from each other. As a result, the bending characteristics of the high-pressure pipe can be improved.

[0058] For example, when the fiber-reinforced polymer tape forming the second reinforcing layer (300) is wound in the S direction, the fiber-reinforced polymer tape forming the third reinforcing layer (400) is wound in the Z direction, and when the fiber-reinforced polymer tape forming the second reinforcing layer (300) is wound in the Z direction, the fiber-reinforced polymer tape forming the third reinforcing layer (400) is wound in the S direction.

[0059] In addition, the transverse winding angle (θ) of the fiber-reinforced polymer tape forming each of the second reinforcing layer (300) and the third reinforcing layer (400), i.e. the angle at which the fiber-reinforced polymer tape is inclined with respect to the central axis of the high-pressure pipe, may be 45° or more and less than 90°. Here, when the transverse winding angle (θ) is less than 45°, the reinforcing characteristics of the second reinforcing layer (300) and the third reinforcing layer (400) may be insufficient.

[0060] In addition, the jacket (500) may be made of a material having a melting point of 50°C or higher, preferably 70°C or higher, such as high-density polyethylene (HDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), ethylene vinyl acetate (EVA), ethylene acetic acid (EEA), polyolefin elastomer (POE), thermoplastic polyethylene (TPE), etc.

[0061] Here, if the melting point of the above-mentioned sheath layer is less than 50°C, the heat resistance is low, which may cause the sheath layer to deteriorate or lose its shape when used for a long period of time. In addition, the brittle temperature of the above-mentioned sheath layer may be -5°C or lower, preferably -10°C or lower, thereby providing excellent cold resistance. Here, if the brittle temperature of the above-mentioned sheath layer exceeds -5°C, cracks may occur in the above-mentioned sheath layer in cold environments such as winter.

[0062] The above brittleness temperature can be measured by the following mathematical formula 3 in accordance with the standard ASTM D746.

[0063] [Equation 3]

[0064]

[0065] In the above mathematical expression 3, T b is the brittleness temperature, T h is the highest temperature at which the specimen is destroyed during the cold resistance evaluation test, △T is the temperature change during the cold resistance evaluation test, and S is the sum of the percentages of samples destroyed at each test temperature.

[0066]

[0067] [Example]

[0068]

[0069] 1. Manufacturing example

[0070]

[0071] A pipe (liner + reinforcement layer + sheath layer) sample was fabricated with a fiber-reinforced polymer tape comprising the filament yarns described in Table 1 below. Here, the filament yarns were formed by twisting and intertwining aramid fibers, and the total content was applied equally at 35 wt%.

[0072]

[0073] Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Filament Yarn a 4-ply 2-ply Filament Yarn b 4-ply Filament Yarn c 4-ply Filament Yarn d 4-ply Filament Yarn e 4-ply

[0074] - Filament Yarn a: Tex 600, TPM 100, elastic recovery rate 90%, tensile strength 1,050 MPa

[0075] - Filament yarn b: Tex 45, TPM 100, elastic recovery rate 95%, tensile strength 900 MPa

[0076] - Filament yarn c: Tex 500, TPM 20, elastic recovery rate 80%, tensile strength 800

[0077] - Filament yarn: Tex 600, TPM 100, elastic recovery rate 90%, tensile strength 450 MPa

[0078] - Filament yarn: Tex 600, TPM 100, elastic recovery rate 50%, tensile strength 800 MPa

[0079]

[0080] 2. Physical property evaluation

[0081]

[0082] 1) Pressure test

[0083] In accordance with the KGS FS112 standard, the presence of cracks and other damage in the pipe's reinforcement layer was assessed by applying a pressure 1.5 times the operating pressure. If the pipe remained intact for more than 10 minutes, it was rated as very good. If it remained intact for more than 5 minutes but less than 10 minutes, it was rated as good. If it failed in less than 5 minutes, it was rated as unsatisfactory.

[0084] 2) Flexibility test

[0085] After measuring the minimum bend radius (MBR) of the pipe according to the standard API 15S, if the pipe does not break after 15 repeated bends to the minimum bend radius, it is evaluated as very good; if it does not break after 10 to 14 repeated bends, it is evaluated as good; and if it breaks after less than 10 repeated bends, it is evaluated as unsatisfactory.

[0086] The results of the above property evaluation are as described in Table 2 below.

[0087]

[0088] Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Pressure Test Very Good Excellent Excellent Excellent Dissatisfied Dissatisfied Flexibility Test Excellent Very Good Dissatisfied Dissatisfied Excellent Excellent

[0089]

[0090] As described in Table 2 above, the high-pressure pipes of Examples 1 and 2 that satisfy the thickness, twist count, elastic recovery rate, and tensile strength of the filament yarn were confirmed to have both very good or excellent pressure performance and flexibility.

[0091] On the other hand, it was confirmed that the high-pressure pipe of Comparative Example 1, in which the thickness of the filament yarn was below the standard, or the high-pressure pipe of Comparative Example 2, in which the number of twists of the filament yarn was below the standard, had significantly reduced flexibility.

[0092] In addition, it was confirmed that the high-pressure pipe of Comparative Example 3, in which the tensile strength of the filament yarn was below the standard, or Comparative Example 4, in which the elastic recovery rate was below the standard, had significantly reduced pressure performance.

[0093] While this specification has described preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as defined in the claims below. Therefore, any modified implementation that fundamentally includes the elements of the claims should be considered within the technical scope of the present invention.

Claims

1. As a fiber-reinforced polymer tape, A fiber-reinforced polymer tape, wherein a plurality of filament yarns in which a plurality of reinforcing fiber filaments are twisted are impregnated in a polymer resin, and the filament yarns have a tex of 50 to 4,000 and a twist count (TPM) of 30 to 200.

2. In paragraph 1, A fiber-reinforced polymer tape, characterized in that the above filament yarn has an elastic recovery rate of 60% or more as defined by the following mathematical formula 1. [Mathematical Formula 1] In the above mathematical expression 1, the elastic modulus measured after 2% elongation means the elastic modulus measured after 1 minute of elongation of the filament yarn at 2% elongation for 30 seconds.

3. In paragraph 1 or 2, A fiber-reinforced polymer tape, characterized in that the above filament yarn has a tensile strength of 500 MPa or more, an elongation of 1% or more, and an elastic modulus of 30 GPa or more.

4. In paragraph 1 or 2, A fiber-reinforced polymer tape, characterized in that the plurality of filament yarns are all oriented in the same direction.

5. In paragraph 1 or 2, A fiber-reinforced polymer tape, characterized in that the total content of the plurality of filament yarns is 30 to 90 wt% based on the total weight of the fiber-reinforced polymer tape.

6. In paragraph 1 or 2, A fiber-reinforced polymer tape, characterized in that the polymer resin comprises at least one polymer resin selected from the group consisting of ultra-high molecular weight polyethylene (UHMWPE), high-density polyethylene (HDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), polypropylene (PP), ethylene-propylene rubber (EPDM), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile-butadiene rubber (NBR), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), fluorocarbon rubber (FKM), silicone rubber, polyvinyl chloride (PVC), maleic anhydride-grafted polyolefin, ethylene vinyl alcohol (EVOH), polyamide (PA11, PA12), polyethylene teraphthalate (PET), and polybutylene teraphthalate (PBT).

7. In paragraph 1 or 2, A fiber-reinforced polymer tape, characterized in that the above reinforcing fiber filament comprises at least one reinforcing fiber filament selected from the group consisting of carbon fiber, aramid fiber, glass fiber, metal fiber, ultra-high molecular weight polyethylene fiber, nylon fiber, and basalt fiber.

8. A tube-shaped liner having a hydrogen transport path formed inside; and A high-pressure pipe comprising a reinforcing layer formed on the outer surface of the liner and formed by transverse winding of the fiber-reinforced polymer tape of claim 1 or claim 2.

9. In paragraph 8, The above reinforcing layer is formed of two or more layers, A high-pressure pipe characterized in that the transverse winding directions of the fiber-reinforced polymer tapes forming each of the adjacent layers among the two or more layers are different from each other.

10. In paragraph 8, A high-pressure pipe characterized in that it additionally includes a sheath layer surrounding the reinforcing layer.

Images