CN107345602B - Flexible composite pipe and manufacturing method thereof - Google Patents

Flexible composite pipe and manufacturing method thereof Download PDF

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Publication number
CN107345602B
CN107345602B CN201610288229.9A CN201610288229A CN107345602B CN 107345602 B CN107345602 B CN 107345602B CN 201610288229 A CN201610288229 A CN 201610288229A CN 107345602 B CN107345602 B CN 107345602B
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China
Prior art keywords
fiber fabric
thermoplastic
fiber
composite pipe
flexible composite
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CN201610288229.9A
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Chinese (zh)
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CN107345602A (en
Inventor
黄险波
陈大华
李晓拓
范欣愉
孙雅杰
徐光磊
熊鑫
蒲颖
蔡华轮
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Guangdong Jinfa Composite Materials Co ltd
Guangzhou Kingfa Carbon Fiber New Material Development Co ltd
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Guangzhou Kingfa Carbon Fiber New Materials Development Co ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/24—Hoses, i.e. flexible pipes wound from strips or bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/78—Measuring, controlling or regulating of temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/581—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/005—Hoses, i.e. flexible pipes consisting completely or partially of material other than fibres, plastics or metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76498—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76531—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

Abstract

The invention discloses a flexible composite pipe and a manufacturing method thereof. The flexible composite pipe comprises a fiber fabric thermoplastic prepreg tape, the thickness of the fiber fabric thermoplastic prepreg tape is 0.1-30 mm, the inner diameter of the flexible composite pipe is 10-200 mm, and the fiber fabric thermoplastic prepreg tape in the flexible composite pipe comprises the following components: 2 to 8 parts by weight of thermoplastic resin and 2 to 8 parts by weight of fiber fabric. The manufacturing method of the fiber fabric thermoplastic prepreg tape comprises the following steps: thermoplastic plastic is vertically injected to a pore plate with fiber fabric by using a thermoplastic plastic injection molding process under the conditions of 150-400 ℃ and 10-30 MPa to prepare a fiber fabric thermoplastic prepreg tape, and then the fiber thermoplastic prepreg tape can be wound and molded to obtain the flexible composite pipe. The method of circumferential winding is adopted during the manufacturing of the flexible composite pipe, the method can be widely applied to the production of the flexible composite pipe, the stability of the product is greatly improved, and the processing equipment and the process are simple.

Description

Flexible composite pipe and manufacturing method thereof
Technical Field
The invention relates to the technical field of flexible composite pipes, in particular to a fiber fabric prepreg tape reinforced flexible composite pipe and a manufacturing method thereof.
Background
The existing main flow manufacturing process of the flexible composite pipe mainly adopts a fiber reinforced thermoplastic unidirectional prepreg tape to spirally wind at a certain angle, and the common winding angle is close to 55 degrees. The manufacturing process is complex, because the winding angle is close to 55 degrees, multiple discs of prepreg tapes are usually required to be wound simultaneously, the tension of the multiple discs of prepreg tapes is controlled on equipment simultaneously, and the gap consistency is good after the multiple discs of prepreg tapes are wound on an inner lining pipe, but if the winding is not carried out at an angle close to 55 degrees, only hoop winding is adopted, because the fiber reinforced thermoplastic unidirectional prepreg tapes have the characteristics that the strength in the fiber direction is high, and the strength in the direction perpendicular to the fiber direction is very low, the burst pressure of the pipe formed by winding is low.
Up to now, there has been no report on how to manufacture a fiber fabric into a fiber fabric thermoplastic prepreg tape and then hoop-wind the fiber fabric thermoplastic prepreg tape to obtain a flexible composite pipe with high burst pressure.
Disclosure of Invention
The invention aims to provide a flexible composite pipe with high bursting pressure.
Another object of the present invention is to provide a method for manufacturing a flexible composite pipe with a simple process.
A flexible composite pipe comprises a fiber fabric thermoplastic prepreg tape, wherein the thickness of the fiber fabric thermoplastic prepreg tape is 0.1 mm-30 mm, and the inner diameter of the flexible composite pipe is 10 mm-200 mm.
The fiber fabric thermoplastic prepreg tape contains fiber fabric and thermoplastic resin, and comprises the following two components in parts by weight:
2 to 8 parts by weight of a thermoplastic resin
2 to 8 parts by weight of the fiber fabric.
The fiber fabric is formed by weaving one or a mixture of more of carbon fiber, glass fiber, aramid fiber, polyester fiber, polyethylene fiber, steel wire or steel belt.
A flexible composite pipe comprises a fiber fabric thermoplastic prepreg tape, an inner liner layer and/or an outer protective layer, wherein the thickness of the inner liner layer is 0.1-30 mm, and the thickness of the outer protective layer is 0.1-30 mm. The inner liner layer and the outer protective layer are selected from one or a mixture of a plurality of Polyethylene (PE), nylon (PA), polyvinylidene fluoride (PVDF), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyether ketone (PEKK) or foamed polyethylene. The inner liner can prevent that the reinforcing material layer is direct and inside fluid contact, and the outer protective layer can prevent outside sunshine from penetrating directly, adds the object of the protection flexible composite pipe that foretell inner liner and outer protective layer can be better in flexible composite pipe transportation. Methods for preparing finished products from raw materials for the inner liner and the outer protective layer are well known.
The bursting pressure of the flexible composite pipe is 2.8MPa-90 MPa.
The manufacturing method of the flexible composite pipe without the inner liner layer and/or the outer protective layer comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastic is vertically injected into a mold cavity by using a thermoplastic plastic injection molding process under the conditions of 150-400 ℃ and 10-30 MPa to prepare a fiber fabric thermoplastic prepreg tape, the upper part of the mold cavity is a high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, the fiber fabric is arranged on the hole plate, and a nozzle in the high-pressure injection molding machine faces to the holes of the lower panel;
(3) a winding machine is used to circumferentially wind a fiber fabric thermoplastic prepreg tape on a core cylinder.
A method of manufacturing a flexible composite pipe with an inner liner and/or an outer protective layer in addition to a fiber fabric thermoplastic prepreg tape, is as follows:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastic is vertically injected into a mold cavity by using a thermoplastic plastic injection molding process under the conditions of 150-400 ℃ and 10-30 MPa to prepare a fiber fabric thermoplastic prepreg tape, the upper part of the mold cavity is a high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, the fiber fabric is arranged on the hole plate, and a nozzle in the high-pressure injection molding machine faces to the holes of the lower panel;
(3) and using a winding machine to wind the fiber fabric thermoplastic prepreg on the inner lining layer in a circumferential direction, and/or coating the outer protective layer on the fiber fabric thermoplastic prepreg tape.
The invention has the following beneficial effects:
as the warp performance and the weft performance of the fiber fabric are balanced, the flexible composite pipe manufactured by using the fiber fabric thermoplastic prepreg tape for hoop winding has high bursting pressure, and compared with other winding methods, the hoop winding method has the characteristic of simple process.
Detailed Description
The following detailed description of the present invention is provided to further explain the present invention, and to enable a further understanding of the present invention by its conception, its technical problems, and the technical features and advantages that constitute the present invention. However, the description of the embodiments is illustrative and not intended to limit the present invention.
The bursting pressure tester can measure the bursting pressure of the flexible composite pipe.
Example 1
The utility model provides a flexible composite pipe, is inside to outside inner liner, fabric thermoplasticity preimpregnation area and outer protective layer, and flexible composite pipe internal diameter is 100mm, and the thickness of inner liner is 2mm, and the thickness in fabric thermoplasticity preimpregnation area is 1mm, and the thickness of outer protective layer is 5 mm. The fiber fabric thermoplastic prepreg tape comprises 3 parts by weight of a thermoplastic resin and 7 parts by weight of a fiber fabric, which is a glass fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine under the conditions of 168 ℃ and 15MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces towards a lower hole;
(3) and (3) winding the fiber fabric thermoplastic prepreg tape on the inner lining layer nylon in the circumferential direction by using a winding machine, and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 2.8 MPa.
Example 2
The utility model provides a flexible composite pipe, is inside liner, fabric thermoplasticity preimpregnation area and outer protective layer from inside to outside, and flexible composite pipe internal diameter is 100mm, and the thickness of inside liner is 10mm, and the thickness of fabric thermoplasticity preimpregnation area is 10mm, and the thickness of outer protective layer is 5mm, and fabric thermoplasticity preimpregnation area contains 4 parts by weight of thermoplastic resin and 6 parts by weight of fabric, fabric contains 10wt% carbon fiber, 30wt% glass fiber, 10wt% aramid fiber, 20wt% polyester fiber, 30wt% polyethylene fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine at 263 ℃ and 24MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, the fiber fabric is arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a lower hole;
(3) and (3) winding the fiber fabric thermoplastic prepreg tape on the inner lining layer nylon in the circumferential direction by using a winding machine, and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 32 MPa.
Example 3
The utility model provides a flexible composite pipe, is inner liner, fabric thermoplasticity preimpregnation area and outer protective layer from inside to outside, and flexible composite pipe internal diameter is 10mm, and the thickness of inner liner is 1mm, and the thickness in fabric thermoplasticity preimpregnation area is 1mm, and the thickness of outer protective layer is 5mm, and fabric thermoplasticity preimpregnation area contains 5 parts by weight of thermoplastic resin and 5 parts by weight's fabric, fabric is glass fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine at 260 ℃ and 13MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces towards a lower hole;
(3) and (3) winding the fiber fabric thermoplastic prepreg tape on the inner lining layer nylon in the circumferential direction by using a winding machine, and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape. The burst pressure of the flexible composite pipe was measured to be 28 MPa.
Example 4
The utility model provides a flexible composite pipe, is inside to outside inner liner, fabric thermoplasticity preimpregnation area and outer protective layer, and flexible composite pipe internal diameter is 50mm, and the thickness of inner liner is 5mm, and the thickness in fabric thermoplasticity preimpregnation area is 5mm, and the thickness of outer protective layer is 5mm, and fabric thermoplasticity preimpregnation area contains 4.5 parts by weight of thermoplastic resin and 5.5 parts by weight's fabric, fabric is glass fiber.
The manufacturing method of the flexible composite pipe comprises the following steps
(1) Thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic resin is vertically injected into a die cavity by a high-pressure injection molding machine at 189 ℃ and 26MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the die cavity is the high-pressure injection molding machine, the lower part of the die cavity is a panel with holes, fiber fabric is arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a lower hole;
(3) and (3) winding the fiber fabric thermoplastic prepreg tape on the inner lining layer nylon in the circumferential direction by using a winding machine, and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 40 MPa.
Example 5
The utility model provides a flexible composite pipe, is inside liner, fabric thermoplasticity preimpregnation area and outer protective layer from inside to outside, and flexible composite pipe internal diameter is 200mm, and the thickness of inside liner is 30mm, and the thickness of fabric thermoplasticity preimpregnation area is 30mm, and the thickness of outer protective layer is 30mm, and fabric thermoplasticity preimpregnation area contains 2 parts by weight of thermoplastic resin and 8 parts by weight of fabric, fabric contains 40wt% aramid fiber and 60wt% polyester fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine at 312 ℃ and 22MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces towards a lower hole;
(3) using a winding machine, a fiber fabric thermoplastic prepreg tape is wound on an inner liner layer composed of 40wt% of nylon and 60wt% of polyether ketone in a circumferential direction, and an outer protective layer polyethylene is coated on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 45 MPA.
Example 6
A flexible composite pipe comprises an inner liner layer, a fiber fabric thermoplastic prepreg tape and an outer protective layer from inside to outside, wherein the inner diameter of the flexible composite pipe is 10mm, the thickness of the inner liner layer is 0.1mm, the thickness of the fiber fabric thermoplastic prepreg tape is 0.1mm, the thickness of the outer protective layer is 0.1mm, the fiber fabric thermoplastic prepreg tape comprises 2.5 parts by weight of thermoplastic resin and 7.5 parts by weight of fiber fabric, and the fiber fabric comprises 40wt% of aramid fiber, 50wt% of polyester fiber and 10wt% of polyethylene fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine under the conditions of 150 ℃ and 10MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces towards a lower hole;
(3) using a winding machine, a fiber fabric thermoplastic prepreg tape was hoop-wound on an inner liner layer containing 30wt% of polyetheretherketone and 70wt% of polyetherketoneketone, and an outer protective layer polyethylene was coated on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 5 MPa.
Example 7
A flexible composite pipe comprises an inner liner, a fiber fabric thermoplastic prepreg tape and an outer protective layer from inside to outside, wherein the inner diameter of the flexible composite pipe is 150mm, the thickness of the inner liner is 10mm, the thickness of the fiber fabric thermoplastic prepreg tape is 30mm, the thickness of the outer protective layer is 10mm, the fiber fabric thermoplastic prepreg tape comprises 3 parts by weight of thermoplastic resin and 7 parts by weight of fiber fabric, and the fiber fabric comprises 20wt% of polyethylene fibers, 30wt% of steel wires and 50wt% of steel belts.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine under the conditions of 400 ℃ and 30MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces towards a lower hole;
(3) and (3) winding the fiber fabric thermoplastic prepreg tape on the polyphenylene sulfide of the inner lining layer in the circumferential direction by using a winding machine, and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 68 MPa.
Example 8
A flexible composite pipe comprises an inner lining layer and a fiber fabric thermoplastic prepreg tape from inside to outside, wherein the inner diameter of the flexible composite pipe is 10mm, the thickness of the inner lining layer is 2mm, the thickness of the fiber fabric thermoplastic prepreg tape is 3mm, the fiber fabric thermoplastic prepreg tape comprises 8 parts by weight of thermoplastic resin and 2 parts by weight of fiber fabric, and the fiber fabric comprises 40wt% of glass fiber and 60wt% of polyester fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine under the conditions of 266 ℃ and 18MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a hole below;
(3) a winding machine was used to hoop wind a fiber fabric thermoplastic prepreg tape over the liner layer polyethylene.
The burst pressure of the flexible composite pipe was measured to be 75 MPa.
Example 9
A flexible composite pipe comprises an inner lining layer and a fiber fabric thermoplastic prepreg tape from inside to outside, wherein the inner diameter of the flexible composite pipe is 150mm, the thickness of the inner lining layer is 20mm, the thickness of the fiber fabric thermoplastic prepreg tape is 10mm, the fiber fabric thermoplastic prepreg tape comprises 5 parts by weight of thermoplastic resin and 5 parts by weight of fiber fabric, and the fiber fabric comprises 40wt% of polyethylene fibers and 60wt% of polyester fibers.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) vertically injecting thermoplastic plastics into a mold cavity by using a high-pressure injection molding machine under the conditions of 233 ℃ and 20MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a hole below;
(3) a filament fabric thermoplastic prepreg tape was hoop wound over the inner liner of polyvinylidene fluoride using a winder.
The burst pressure of the flexible composite pipe was measured to be 26 MPa.
Example 10
A flexible composite pipe comprises a fiber fabric thermoplastic prepreg tape and an outer protective layer from inside to outside, wherein the inner diameter of the flexible composite pipe is 10mm, the thickness of the fiber fabric thermoplastic prepreg tape is 3mm, the thickness of the outer protective layer is 3mm, the fiber fabric thermoplastic prepreg tape comprises 5 parts by weight of thermoplastic resin and 5 parts by weight of fiber fabric, and the fiber fabric comprises 40wt% of aramid fiber and 60wt% of polyester fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) injecting thermoplastic plastics into a die cavity vertically by using a high-pressure injection molding machine under the conditions of 298 ℃ and 29MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the die cavity is the high-pressure injection molding machine, the lower part of the die cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a hole below;
(3) and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 90 MPa.
Example 11
A flexible composite pipe comprises a fiber fabric thermoplastic prepreg tape and an outer protective layer from inside to outside, wherein the inner diameter of the flexible composite pipe is 15mm, the thickness of the fiber fabric thermoplastic prepreg tape is 0.1mm, the thickness of the outer protective layer is 10mm, the fiber fabric thermoplastic prepreg tape comprises 6 parts by weight of thermoplastic resin and 4 parts by weight of fiber fabric, and the fiber fabric comprises 10wt% of carbon fiber, 10wt% of glass fiber, 10wt% of aramid fiber, 10wt% of polyester fiber, 10wt% of polyethylene fiber, 10wt% of steel wire and 40wt% of steel belt.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastic is vertically injected into a mold cavity by a high-pressure injection molding machine under the conditions of 325 ℃ and 15MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the mold cavity is the high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, fiber fabric is arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a hole below;
(3) and coating the outer protective layer polyethylene on the fiber fabric thermoplastic prepreg tape.
The burst pressure of the flexible composite pipe was measured to be 23 MPa.
Example 12
A flexible composite pipe comprising a fiber woven thermoplastic prepreg tape having an inner diameter of 150mm and a thickness of 30mm, the fiber woven thermoplastic prepreg tape comprising 6 parts by weight of a thermoplastic resin and 4 parts by weight of a glass fiber.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastics are vertically injected into a die cavity by a high-pressure injection molding machine under the conditions of 316 ℃ and 25MPa to prepare a fiber fabric thermoplastic prepreg tape, wherein the upper part of the die cavity is the high-pressure injection molding machine, the lower part of the die cavity is a panel with holes, fiber fabrics are arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a hole below;
(3) a winding machine is used to circumferentially wind a fiber fabric thermoplastic prepreg tape on a core cylinder.
The burst pressure of the flexible composite pipe was measured to be 83 MPa.
Example 13
A flexible composite pipe comprising a fiber woven thermoplastic prepreg tape, the flexible composite pipe having an inner diameter of 160mm and a thickness of 30mm, the fiber woven thermoplastic prepreg tape comprising 3 parts by weight of a thermoplastic resin and 7 parts by weight of a fiber fabric, the fiber fabric comprising 40% by weight of carbon fibers and 60% by weight of polyester fibers.
The manufacturing method of the flexible composite pipe comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastic is vertically injected into a die cavity by a high-pressure injection molding machine under the conditions of 330 ℃ and 30MPa to prepare a fiber fabric thermoplastic prepreg tape, the upper part of the die cavity is the high-pressure injection molding machine, the lower part of the die cavity is a panel with holes, fiber fabric is arranged in the hole plate, and a nozzle in the high-pressure injection molding machine faces to a hole below.
(3) A winding machine is used to circumferentially wind a fiber fabric thermoplastic prepreg tape on a core cylinder.
The burst pressure of the flexible composite pipe was measured to be 72 MPa.

Claims (4)

1. A method of manufacturing a flexible composite pipe, comprising the steps of:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastic is vertically injected into a mold cavity by using a thermoplastic plastic injection molding process under the conditions of 150-400 ℃ and 10-30 MPa to prepare a fiber fabric thermoplastic prepreg tape, the upper part of the mold cavity is a high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, the fiber fabric is arranged on the hole plate, and a nozzle in the high-pressure injection molding machine faces to the holes of the lower panel;
(3) winding a fiber fabric thermoplastic prepreg tape on a core cylinder in the circumferential direction by using a winding machine;
the flexible composite pipe comprises a fiber fabric thermoplastic prepreg tape, the thickness of the fiber fabric thermoplastic prepreg tape is 0.1-30 mm, and the inner diameter of the flexible composite pipe is 10-200 mm; the fiber fabric thermoplastic prepreg tape comprises the following two components by weight:
2 to 8 parts by weight of a thermoplastic resin;
2-8 parts of fiber fabric;
the bursting pressure of the flexible composite pipe is 2.8MPa-90 MPa.
2. The method of claim 1, wherein the fiber fabric is selected from the group consisting of carbon fiber, glass fiber, aramid fiber, polyester fiber, polyethylene fiber, steel wire, and steel tape.
3. The manufacturing method of the flexible composite pipe is characterized in that the flexible composite pipe further comprises an inner liner layer and/or an outer protective layer, the thickness of the inner liner layer is 0.1 mm-30 mm, and the thickness of the outer protective layer is 0.1 mm-30 mm; the thermoplastic prepreg tape comprises the following two components: 2 to 8 parts by weight of a thermoplastic resin; 2-8 parts of fiber fabric;
the method comprises the following steps:
(1) thermoplastic resin is used as a raw material to prepare thermoplastic plastics;
(2) thermoplastic plastic is vertically injected into a mold cavity by using a thermoplastic plastic injection molding process under the conditions of 150-400 ℃ and 10-30 MPa to prepare a fiber fabric thermoplastic prepreg tape, the upper part of the mold cavity is a high-pressure injection molding machine, the lower part of the mold cavity is a panel with holes, the fiber fabric is arranged on the hole plate, and a nozzle in the high-pressure injection molding machine faces to the holes of the lower panel;
(3) using a winding machine to wind the fiber fabric thermoplastic prepreg on the inner lining layer in a circumferential direction and/or coat the outer protective layer on the fiber fabric thermoplastic prepreg tape;
the bursting pressure of the flexible composite pipe is 2.8MPa-90 MPa.
4. A method of manufacturing a flexible composite pipe according to claim 3, wherein the fiber fabric is selected from one or more of carbon fiber, glass fiber, aramid fiber, polyester fiber, polyethylene fiber, steel wire or steel tape.
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