Fiber reinforced strip for buckling prevention of armored marine hose and preparation method of fiber reinforced strip

Abstract

The invention discloses a fiber reinforced strip for buckling prevention of an armored marine hose and a preparation method thereof.The fiber reinforced strip comprises reinforced fibers and a polyurethane base material, the reinforced fibers are arranged in the length direction of the fiber reinforced strip and flatly laid in the width direction of the fiber reinforced strip, and the reinforced fibers are arranged in the polyurethane base material; and processing is carried out through cooperation of multiple filament spreading procedures, ultrasonic oscillation and plasma etching. Aryl polyester high polymer fibers are adopted, the thickness of tows is reduced through three times of fiber spreading treatment, the thickness of the reinforced strip is effectively reduced, the fibers are in a straightened and parallel state after being subjected to fiber spreading treatment, and therefore the fiber strength utilization rate is increased.

Description

Technical Field

[0001] The invention relates to a fiber reinforced tape and a preparation method thereof, in particular to a fiber reinforced tape for preventing buckling of an armored marine hose and a preparation method thereof, belonging to the technical field of hoses. Background Art

[0002] Armored marine hose is a key equipment for marine oil and gas exploitation. It must not only withstand the repeated impact of ocean currents and waves in complex sea conditions, but also withstand multiple corrosions such as the transport medium and seawater. It must have multiple characteristics of corrosion resistance, high pressure resistance, high modulus, low stiffness, high strength, low strain, and both soft and rigid. Reverse torsional external winding relaxation and pipeline buckling to form a birdcage are frequent failure modes of marine flexible pipes. Fiber-reinforced tapes for winding anti-buckling are usually used to enhance the anti-buckling deformation ability of marine hoses. Para-aramid has good dimensional stability, low creep and small thermal expansion coefficient, and is a common material for fiber-reinforced tapes for anti-buckling. However, para-aramid has poor wear resistance, large strength loss during processing, and the strength of the finished product is far lower than the theoretical strength. At the same time, there is a "acid-humidity-heat" multiple corrosion environment in each reinforcement layer of the marine hose, and the durability of para-aramid is not high under such conditions. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a fiber reinforced tape for anti-buckling of armored marine hose and a preparation method thereof, which has high strength and low thickness.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A fiber reinforced tape for preventing buckling of an armored marine hose comprises reinforcing fibers and a polyurethane substrate. The reinforcing fibers are arranged along the length direction of the fiber reinforced tape and laid flat along the width direction of the fiber reinforced tape. The reinforcing fibers are arranged in the polyurethane substrate.

[0005] Furthermore, the reinforcing fiber is aromatic polyester polymer fiber.

[0006] Furthermore, the aromatic polyester polymer fiber is liquid crystal polyarylate fiber.

[0007] Furthermore, the liquid crystal polyarylate fiber is high-strength Vectran® fiber produced by Kuraray Co., Ltd. of Japan or Copolymen® fiber produced by Ningbo Jujia New Material Technology Co., Ltd.

[0008] A method for preparing a fiber-reinforced tape for anti-buckling of an armored marine hose comprises the following steps: The reinforcing fibers are spread out into a single-filament layer with uniform spacing and parallel arrangement through the first, second and third fiber spreading processes; The first wire spreading process is carried out in the air, and the second to third wire spreading processes are carried out in water-based glue. Ultrasonic vibration is used to assist the dispersion and arrangement of the reinforcing fibers during the convex roller wire spreading process in the first wire spreading process, the second wire spreading process and the third wire spreading process; A plasma treatment device is arranged between the first wire spreading process and the second wire spreading process. The plasma treatment device generates high-energy particles by inserting a ceramic insulating plate between high-frequency and high-voltage electrode plates to micro-etch the surface of the reinforcing fiber.

[0009] Furthermore, the reinforcing fiber is a filament, the breaking strength of the reinforcing fiber is 20cN / dtex-30cN / dtex, and the fineness of the reinforcing fiber is 500D-1000D.

[0010] Furthermore, the wire spreading widths of the first wire spreading step, the second wire spreading step and the third wire spreading step are 20-50 mm, and the wire spreading widths of the first wire spreading step, the second wire spreading step and the third wire spreading step gradually increase.

[0011] Furthermore, the frequency of the ultrasonic oscillation assistance is 20-50KHz.

[0012] Furthermore, one or a combination of argon, helium, nitrogen and oxygen is continuously flushed between the high-frequency and high-voltage electrode plates of the plasma processing device, the thickness of the ceramic insulating plate is 1.0-2.0 mm, the ceramic insulating plate is close to the high-frequency and high-voltage electrode plates, the gap between the two ceramic insulating plates is 1.0-2.0 mm, the power frequency of the plasma processing device is 2.0-5.0 KHz, and the power voltage is 100-200 V.

[0013] Furthermore, the aqueous glue contains aqueous polyurethane and water, the ratio of aqueous polyurethane to water is 1:0.5-2, and the drying temperature of the aqueous glue is 110-130°C.

[0014] Compared with the prior art, the present invention has the following advantages and effects: 1. The present invention adopts aromatic polyester polymer fibers, and reduces the thickness of the tow through three-pass spreading treatment, effectively reducing the thickness of the reinforced tape. After the spreading treatment, the fibers are straightened and parallel, thereby increasing the fiber strength utilization rate; 2. The present invention uses multi-stage convex rollers to spread the reinforcing fibers. After the first spreading, the second and third spreading are carried out in the aqueous glue, and the convex rollers are used to spread the fibers with the assistance of ultrasonic vibration to make the fiber distribution more uniform and dispersed; 3. The present invention uses high-energy particles to micro-etch the surface of aromatic polyester polymer fibers, and at the same time increases nitrogen-containing and oxygen-containing groups on the fiber surface, effectively enhancing the bonding effect between aromatic polyester polymer fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a fiber reinforced tape for buckling prevention of an armored marine hose according to the present invention. DETAILED DESCRIPTION

[0016] In order to elaborate on the technical scheme adopted by the present invention to achieve the predetermined technical purpose, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments, and the technical means or technical features in the embodiments of the present invention can be replaced without paying creative work. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0017] like Figure 1 As shown, a fiber reinforced tape for preventing buckling of an armored marine hose of the present invention comprises reinforcing fibers 1 and a polyurethane substrate 2. The reinforcing fibers 1 are arranged along the length direction of the fiber reinforced tape and laid flat along the width direction of the fiber reinforced tape. The reinforcing fibers 1 are arranged in the polyurethane substrate 2.

[0018] The reinforcing fiber 1 is an aromatic polyester polymer fiber. The aromatic polyester polymer fiber is a liquid crystal polyarylate fiber. The liquid crystal polyarylate fiber is a high-strength Vectran® fiber produced by Kuraray Co., Ltd. of Japan or a Copolymen® fiber produced by Ningbo Jujia New Material Technology Co., Ltd.

[0019] In this embodiment, the reinforcing fiber 1 is preferably a high-strength Vectran® fiber produced by Kuraray Co., Ltd. of Japan.

[0020] A method for preparing a fiber-reinforced tape for anti-buckling of an armored marine hose comprises the following steps: The reinforcing fibers are spread out into evenly spaced, parallelly arranged single-filament layers through a first spreading process, a second spreading process and a third spreading process.

[0021] The first wire spreading process is carried out in the air, and the second and third wire spreading processes are carried out in water-based adhesive solution.

[0022] Ultrasonic vibration is used to assist the dispersion and arrangement of the reinforcing fibers during the convex roller wire spreading process in the first wire spreading process, the second wire spreading process and the third wire spreading process.

[0023] A plasma treatment device is arranged between the first wire spreading process and the second wire spreading process. The plasma treatment device generates high-energy particles by inserting a ceramic insulating plate between high-frequency and high-voltage electrode plates to micro-etch the surface of the reinforcing fiber.

[0024] The reinforcing fiber is filament, the breaking strength of the reinforcing fiber is 20cN / dtex-30cN / dtex, and the fineness of the reinforcing fiber is 500D-1000D.

[0025] The wire spreading widths of the first wire spreading step, the second wire spreading step and the third wire spreading step are 20-50 mm, and the wire spreading widths of the first wire spreading step, the second wire spreading step and the third wire spreading step gradually increase.

[0026] The frequency of the ultrasonic oscillation assistance is 20-50 KHz. In this embodiment, the frequency of the ultrasonic oscillation assistance is preferably 28±2 KHz.

[0027] Argon, helium, nitrogen and oxygen or a combination of two thereof are continuously injected between the high-frequency and high-voltage electrode plates of the plasma processing device. The thickness of the ceramic insulating plate is 1.0-2.0 mm. The ceramic insulating plate is close to the high-frequency and high-voltage electrode plates. The gap between the two ceramic insulating plates is 1.0-2.0 mm. The power frequency of the plasma processing device is 2.0-5.0 KHz, and the power voltage is 100-200 V.

[0028] The water-based adhesive contains water-based polyurethane and water, the ratio of water-based polyurethane to water is 1:0.5-2, and the drying temperature of the water-based adhesive is 110-130°C.

[0029] The processing speed of the entire fiber reinforced tape is 1.5m / min-2.5m / min.

[0030] Fiber reinforced tapes of different specifications can be obtained by adjusting the resin type, filament density and rubber content.

[0031] The tensile test equipment is 5969H Instron universal material testing machine to test the tensile properties of fiber reinforced tape for anti-buckling of armored marine hose, with a loading speed of 10mm / min. The fiber reinforced tape for anti-buckling of armored marine hose developed by the test has a tensile strength of 1937N / 25mm and a strength utilization rate of about 93%.

[0032] The present invention adopts aromatic polyester polymer fibers, and reduces the thickness of the fiber bundles through three-pass spreading treatment, thereby effectively reducing the thickness of the reinforcing tape. After the spreading treatment, the fibers are in a straightened and parallel state, thereby increasing the fiber strength utilization rate; the present invention adopts multi-stage convex rollers to spread the reinforcing fibers, and after the first spreading, the second and third spreading are carried out in an aqueous glue solution, and the convex rollers are used to spread the fibers under the assistance of ultrasonic vibration, so that the fiber distribution is more uniform and dispersed; the present invention adopts high-energy particles to micro-etch the surface of the aromatic polyester polymer fibers, and at the same time increases nitrogen-containing and oxygen-containing groups on the fiber surface, effectively enhancing the bonding effect between the aromatic polyester polymer fibers.

[0033] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A fiber-reinforced tape for anti-buckling of an armored marine hose, characterized in that: The invention comprises reinforcing fibers and a polyurethane matrix. The reinforcing fibers are arranged along the length direction of the fiber-reinforced tape and laid along the width direction of the fiber-reinforced tape. The reinforcing fibers are arranged in the polyurethane matrix.

2. The fiber-reinforced tape for preventing buckling of an armored marine hose according to claim 1, characterized in that: The reinforcing fiber is aromatic polyester polymer fiber.

3. The fiber-reinforced tape for preventing buckling of an armored marine hose according to claim 2, characterized in that: The aromatic polyester polymer fiber is liquid crystal polyarylate fiber.

4. The fiber-reinforced tape for preventing buckling of an armored marine hose according to claim 3, characterized in that: The liquid crystal polyarylate fiber is high-strength Vectran® fiber produced by Japan Kuraray Co., Ltd. or Copolymen® fiber produced by Ningbo Jujia New Material Technology Co., Ltd.

5. A method for preparing a fiber-reinforced tape for anti-buckling of an armored marine hose according to any one of claims 1 to 4, characterized in that The following steps are involved: The reinforcing fibers are spread out into a single-filament layer with uniform spacing and parallel arrangement through the first, second and third fiber spreading processes; The first wire spreading process is carried out in the air, and the second to third wire spreading processes are carried out in water-based glue. Ultrasonic vibration is used to assist the dispersion and arrangement of the reinforcing fibers during the convex roller wire spreading process in the first wire spreading process, the second wire spreading process and the third wire spreading process; A plasma treatment device is arranged between the first wire spreading process and the second wire spreading process. The plasma treatment device generates high-energy particles by inserting a ceramic insulating plate between high-frequency and high-voltage electrode plates to micro-etch the surface of the reinforcing fiber.

6. The preparation method according to claim 5, characterized in that: The reinforcing fiber is a filament, the breaking strength of the reinforcing fiber is 20 cN / dtex-30 cN / dtex, and the fineness of the reinforcing fiber is 500D-1000D.

7. The preparation method according to claim 5, characterized in that: The wire spreading widths of the first wire spreading step, the second wire spreading step and the third wire spreading step are 20-50 mm, and the wire spreading widths of the first wire spreading step, the second wire spreading step and the third wire spreading step gradually increase.

8. The preparation method according to claim 5, characterized in that: The frequency of the ultrasonic oscillation assistance is 20-50KHz.

9. The preparation method according to claim 5, characterized in that: Argon, helium, nitrogen and oxygen or a combination of two thereof are continuously injected between the high-frequency and high-voltage electrode plates of the plasma processing device. The thickness of the ceramic insulating plate is 1.0-2.0 mm. The ceramic insulating plate is closely attached to the high-frequency and high-voltage electrode plates. The gap between the two ceramic insulating plates is 1.0-2.0 mm. The power frequency of the plasma processing device is 2.0-5.0 KHz, and the power voltage is 100-200 V.

10. The preparation method according to claim 5, characterized in that: The aqueous glue contains aqueous polyurethane and water, the ratio of aqueous polyurethane to water is 1:0.5-2, and the drying temperature of the aqueous glue is 110-130°C.

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