CN104802426B - Carbon fiber thermoplastic prepreg with complex structure and preparation method thereof - Google Patents
Carbon fiber thermoplastic prepreg with complex structure and preparation method thereof Download PDFInfo
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- CN104802426B CN104802426B CN201510157965.6A CN201510157965A CN104802426B CN 104802426 B CN104802426 B CN 104802426B CN 201510157965 A CN201510157965 A CN 201510157965A CN 104802426 B CN104802426 B CN 104802426B
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- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
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- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/526—Pultrusion dies, e.g. dies with moving or rotating parts
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/528—Heating or cooling
Abstract
The invention discloses a carbon fiber thermoplastic prepreg with a complex structure and a preparation method thereof, wherein the carbon fiber thermoplastic prepreg with the complex structure is an arc-shaped sheet carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves; the preparation process comprises the following steps: 1) mixing and pultrusion are carried out on a carbon fiber material and a thermoplastic material at the temperature of 120-350 ℃, so as to obtain a prepreg; 2) heat setting the prepreg; 3) then cooling at 0-30 ℃; 4) rolling; and obtaining the carbon fiber thermoplastic prepreg with a complex structure. The invention can obtain the prepreg which has uniform and stable size and is suitable for the specific structural requirement, and the prepreg can be used for forming a complex structural member by rolling or winding, thereby innovatively developing a preparation method of the carbon fiber thermoplastic composite material part.
Description
Technical Field
The invention belongs to the technical field of composite materials, and relates to a carbon fiber thermoplastic prepreg with a complex structure and a preparation method thereof.
Background
With the shortage of energy and the increasing prominence of environmental pollution, automobile manufacturers around the world are facing the pressure of reducing emission and saving energy. In the fields of petrochemical industry, mechanical manufacturing and the like, the light weight of a complex structure becomes the key point of research in the year, and the carbon fiber composite material has the characteristics of high specific strength, high modulus, corrosion resistance, fatigue resistance, creep resistance, good design and large-area integral forming, and is one of the most effective ways for replacing metal materials to realize the light weight of parts, wherein the specific gravity of the carbon fiber composite material is less than that of 1/4 made of steel. The thermoplastic composite material has a series of advantages of excellent impact toughness, fatigue damage resistance, short forming period, high production efficiency, capability of being repaired and recycled and the like, thereby gaining more and more attention. However, thermoplastic prepregs are being researched more and more at present, but the prepreg sheets are limited to thin plate prepregs, and the prepreg sheets are limited to laying simple parts and are not suitable for the application of complex structures, especially for forming asymmetrical structures. The technology can design the sheet prepreg with the curved surface structure according to the structure of the part, the prepreg is used as a preformed body to prepare the composite material part with the complex structure through winding or hot press molding, the technology can realize batch production of a production line, and the quality control is simple and reliable. The prepreg can be widely applied to aviation, automobile, ship and sports industries.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a carbon fiber thermoplastic prepreg with a complex structure and a preparation method thereof.
In order to achieve the purpose, the invention can be solved by the following technical scheme:
a preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) mixing and pultrusion are carried out on a carbon fiber material and a thermoplastic material at the temperature of 120-350 ℃, so as to obtain a prepreg;
2) heat setting the prepreg;
3) then cooling, wherein when the mixed pultrusion temperature is higher than 250 ℃, the cooling temperature is 15-30 ℃; when the mixed pultrusion temperature is lower than 250 ℃, the cooling temperature is 0-20 ℃;
4) rolling; obtaining the carbon fiber thermoplastic prepreg with a complex structure;
the heat setting process is to bend the prepreg longitudinally at 50-200 ℃ with the bending radius of 30-1000 mm. The bending radius of the prepreg material as a component of the composite material after the prepreg material is wound is determined by the curvature of the component of the composite material.
As a preferred technical scheme:
in the invention, the mixed pultrusion is carried out in a pultrusion die, the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet. The purpose of the included angle is to give enough pressure in the prepreg forming process and improve the prepreg effect of the fibers. The larger the included angle, the better the prepreg effect, and the higher the volume content of the obtained fiber.
In the invention, the shape of the outlet of the pultrusion die is as follows.
In the invention, the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000. The outlet of the pultrusion die determines the structure of the composite material prepreg, and the structure of the composite material prepreg is mainly determined by the sectional structure of the structural part.
In the invention, the heat setting is carried out on a heat setting roller, the temperature of the heat setting roller is 50-200 ℃, and the heat setting roller is a cylindrical die with the diameter of 50-5000 mm. The invention mainly aims at the round complex structural part, so that when the prepreg is formed, the cylindrical die can be selected according to different diameters of the structural part.
In the invention, the volume content of the fibers in the prepreg prepared by the step 4) is 10-90%. The method can prepare the prepregs with different specifications of fiber volume contents according to the performance requirements.
According to the preparation method, the thermoplastic material is polyether ether ketone, polyether ketone, polyphenylene sulfide, nylon, polycarbonate, polypropylene, polystyrene, polyvinyl chloride or polyether sulfone. The thermoplastic composite material with a complex structure is mainly made of easily-formed plastics or engineering plastics with good mechanical properties.
According to the preparation method, the carbon fiber material is a T300-grade, T700-grade or T1000-grade continuous filament or a carbon fiber continuous filament with the modulus of more than or equal to 230 GPa.
In the preparation method, the cooling mode is water cooling. The water cooling mode is convenient, the efficiency is high, and the cost is low.
The invention also provides the carbon fiber thermoplastic prepreg with the complex structure prepared by the preparation method.
Advantageous effects
Due to the adoption of the technical scheme, the preparation method of the carbon fiber thermoplastic prepreg with the complex structure can conveniently and quickly obtain the prepreg required by complex parts. The method can obtain the prepreg with uniform size and suitable for specific structural requirements, and the prepreg can be formed into a complex structural member by rolling or winding.
Drawings
FIG. 1 is an expanded view of a prepreg of the present invention;
FIG. 2 is a schematic view of a take-up roll and a sizing roll of the present invention;
FIG. 3 is a schematic representation of prepreg sizing and winding in the present invention;
FIG. 4 is a schematic view of a pultrusion die orifice in accordance with the present invention;
FIG. 5 is a sectional view of a prepreg pultrusion mold according to the present invention
Detailed Description
The invention is further illustrated in the following figures and detailed description of embodiments of the invention:
example 1
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) carrying out mixed pultrusion on continuous filaments of which the carbon fiber material is T300 grade and polyether-ether-ketone in a pultrusion die at the temperature of 350 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 50 ℃, the heat setting roller is a cylindrical die with the diameter of 50mm, and the rotating speed of the heat setting roller is 10 mm/min;
3) then cooling with water at 0 deg.C;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 10%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 50 ℃, and the bending radius is 30 mm.
Example 2
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) carrying out mixed pultrusion on continuous filaments of which the carbon fiber material is T700 and polyether ketone in a pultrusion die at 340 ℃ to obtain prepreg; wherein the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 200 ℃, the heat setting roller is a cylindrical die with the diameter of 5000mm, and the rotating speed of the heat setting roller is 1000 mm/min;
3) then cooling with water at the temperature of 30 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 90%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 200 ℃, and the bending radius is 1000 mm.
Example 3
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) carrying out mixed pultrusion on continuous filaments of which the carbon fiber material is T1000 grade and polyphenylene sulfide in a pultrusion die at 290 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 100 ℃, the heat setting roller is a cylindrical die with the diameter of 1000mm, and the rotating speed of the heat setting roller is 500 mm/min;
3) then cooling with water at the temperature of 10 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 50%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 100 ℃, and the bending radius is 500 mm.
Example 4
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) mixing and pultrusion are carried out on carbon fiber continuous filaments with the modulus of 230GPa and nylon in a pultrusion die at the temperature of 230 ℃, so as to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 150 ℃, the heat setting roller is a cylindrical die, the diameter of the heat setting roller is 120mm, and the rotating speed of the heat setting roller is 60 mm/min;
3) then cooling with water at 15 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 40%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting refers to that the prepreg is longitudinally bent at the temperature of 150 ℃, and the bending radius is 800 mm.
Example 5
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) mixing and pultrusion are carried out on carbon fiber continuous filaments with the modulus of 250GPa and polycarbonate in a pultrusion die at the temperature of 250 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 200 ℃, the heat setting roller is a cylindrical die with the diameter of 50mm, and the rotating speed of the heat setting roller is 10 mm/min;
3) then cooling with water at the temperature of 8 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 30%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 200 ℃, and the bending radius is 100 mm.
Example 6
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) carrying out mixed pultrusion on continuous filaments of which the carbon fiber material is T300 grade and polypropylene in a pultrusion die at the temperature of 140 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 180 ℃, the heat setting roller is a cylindrical die, the diameter of the heat setting roller is 250mm, and the rotating speed of the heat setting roller is 60 mm/min;
3) then cooling with water at the temperature of 20 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 55%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 180 ℃, and the bending radius is 80 mm.
Example 7
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) carrying out mixed pultrusion on continuous filaments of which the carbon fiber material is T700 grade and polystyrene in a pultrusion die at the temperature of 150 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 160 ℃, the heat setting roller is a cylindrical die, the diameter of the heat setting roller is 3000mm, and the rotating speed of the heat setting roller is 3000 mm/min;
3) then cooling with water at 25 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 60%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting refers to that the prepreg is longitudinally bent at the temperature of 160 ℃, and the bending radius is 550 mm.
Example 8
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) carrying out mixed pultrusion on continuous filaments of which the carbon fiber material is T1000 grade and polyvinyl chloride in a pultrusion die at the temperature of 120 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 100 ℃, the heat setting roller is a cylindrical die with the diameter of 100mm, and the rotating speed of the heat setting roller is 12 mm/min;
3) then cooling with water at the temperature of 22 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 35%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 100 ℃, and the bending radius is 600 mm.
Example 9
A preparation method of carbon fiber thermoplastic prepreg with a complex structure is provided, wherein the carbon fiber thermoplastic prepreg with the complex structure is arc sheet-shaped carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves;
the preparation process comprises the following steps:
1) mixing and pultrusion are carried out on continuous filaments of which the carbon fiber material is T1000 grade and polyether sulfone in a pultrusion die at the temperature of 250 ℃ to obtain prepreg; the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the pultrusion die outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000; FIG. 4 is a schematic view of the die orifice of the pultrusion die in the present embodiment, and FIG. 5 is a sectional view of the pultrusion die for prepreg;
2) heat setting the prepreg on a heat setting roller; the temperature of the heat setting roller is 100 ℃, the heat setting roller is a cylindrical die with the diameter of 1000mm, and the rotating speed of the heat setting roller is 500 mm/min;
3) then cooling with water at the temperature of 10 ℃;
4) rolling; obtaining a carbon fiber thermoplastic prepreg with a complex structure and a fiber volume content of 50%, as shown in fig. 1, which is an unfolded shape diagram of the prepreg in the embodiment, fig. 2 is a schematic diagram of a winding roller and a sizing roller used in the embodiment, and fig. 3 is a schematic diagram of the prepreg after sizing and winding;
the heat setting means that the prepreg is longitudinally bent at the temperature of 100 ℃, and the bending radius is 500 mm.
However, the foregoing detailed description is merely exemplary in nature and is intended to better enable one skilled in the art to understand the patent, and is not intended to limit the scope of the patent; any equivalent alterations or modifications made according to the spirit of the disclosure of this patent are intended to be included in the scope of this patent.
Claims (7)
1. The preparation method of the carbon fiber thermoplastic prepreg with the complex structure is characterized in that the carbon fiber thermoplastic prepreg with the complex structure is an arc-shaped sheet carbon fiber thermoplastic prepreg, and the trace of the cross section of the carbon fiber thermoplastic prepreg is the combination of curves; the preparation process comprises the following steps:
1) mixing and pultrusion are carried out on a carbon fiber material and a thermoplastic material at the temperature of 120-350 ℃, so as to obtain a prepreg; the mixed pultrusion is carried out in a pultrusion die, the size of an inlet of a die cavity of the pultrusion die is larger than that of an outlet, and an included angle of 0-30 degrees is formed from the inlet to the outlet; the shape of the outlet of the pultrusion die is 1-10 bending structures, and the curvature of each bending structure is 1-1000;
2) heat setting the prepreg;
3) then cooling at 0-30 ℃;
4) rolling; obtaining the carbon fiber thermoplastic prepreg with a complex structure;
the heat setting process is to bend the prepreg longitudinally at 50-200 ℃ with the bending radius of 30-1000 mm.
2. The method of claim 1, wherein the heat setting is performed on a heat setting roll having a temperature of 50 to 200 ℃ and a diameter of 50 to 5000 mm.
3. The preparation method according to claim 1, wherein the volume content of the fibers in the prepreg prepared in the step 4) is 10-90%.
4. The method according to claim 1, wherein the thermoplastic material is polyetheretherketone, polyetherketone, polyphenylene sulfide, nylon, polycarbonate, polypropylene, polystyrene, polyvinyl chloride, or polyethersulfone.
5. The preparation method according to claim 1, wherein the carbon fiber material is a continuous filament of T300 grade, T700 grade or T1000 grade, or a carbon fiber continuous filament with a modulus of 230GPa or more.
6. The method according to claim 1, wherein the cooling is performed by water cooling.
7. A carbon fiber thermoplastic prepreg of a complex structure prepared by the production method as set forth in any one of claims 1 to 6 above.
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| KR20020063627A (en) * | 2000-01-13 | 2002-08-03 | 다우 글로벌 테크놀로지스 인크. | Process for in-line forming of pultruded composites |
| CN102582095A (en) * | 2012-01-10 | 2012-07-18 | 江苏澳盛复合材料科技有限公司 | Dry process for forming arc-shaped continuous fiber composite board |
| DE102012202048A1 (en) * | 2012-02-10 | 2013-08-14 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing a wheel rim made of fiber composite material and wheel rim for a motor vehicle |
| CN103341966B (en) * | 2013-06-07 | 2015-05-27 | 南京诺尔泰复合材料设备制造有限公司 | Production method and production line for high-performance fibre bent section material |
| CN204054684U (en) * | 2014-07-02 | 2014-12-31 | 南通澳兰德复合材料有限公司 | Curved section bar pultrusion die |
-
2015
- 2015-04-03 CN CN201510157965.6A patent/CN104802426B/en active Active
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| CN104802426A (en) | 2015-07-29 |
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