A kind of high thermal conductivity and high modulus carbon fiber fabric and preparation method thereof

Abstract

The present invention discloses a high-thermal-conductivity and high-modulus carbon fiber fabric and a preparation method thereof. By controlling the surface roughness of a constraint path through which fibers pass in a high-thermal-conductivity and high-modulus carbon fiber weaving device, the roller radius of a fiber contact portion, the curvature radius of a wire guide hole, etc., the wear of high-modulus fibers during weaving and the generation of excessive bending angles are reduced, and the generation of broken and fuzzy fibers is reduced, thereby achieving successful weaving of high-thermal-conductivity and high-modulus carbon fibers while ensuring a high performance retention rate of the fibers.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber products, and particularly relates to a high-thermal-conductivity and high-modulus carbon fiber fabric and a preparation method thereof. Background Art

[0002] High thermal conductivity and high modulus carbon fiber has excellent properties such as high thermal conductivity, ultra-high modulus, low expansion, light weight and high strength. It is one of the best structural and functional integrated materials and can be widely used in heat dissipation fields such as high-precision integrated circuits and satellite structural parts that require high thermal dimensional stability. Traditional heat dissipation materials use metals such as copper and aluminum, which have high density and high thermal expansion coefficient and are difficult to meet the high-precision requirements in some fields. Therefore, high thermal conductivity and high modulus carbon fiber composite materials are one of the high thermal conductivity candidate materials with development prospects.

[0003] High thermal conductivity and high modulus carbon fiber also has high modulus characteristics, low compression modulus, small elongation at break, poor shear resistance, poor flexure, easy to break and pilling during weaving, and the yarn is very easy to wear, pilling, breakage, etc. when passing through the roller surface, weaving and yarn interweaving, making it difficult to weave into shape. The traditional weaving process is no longer applicable, which increases the difficulty of weaving high thermal conductivity and high modulus carbon fiber and hinders the application of high thermal conductivity and high modulus carbon fiber cloth. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a high thermal conductivity and high modulus carbon fiber fabric and a preparation method thereof, which reduces the damage of fibers during the weaving process of the high thermal conductivity and high modulus carbon fiber, improves the performance retention rate of the carbon fiber in the high thermal conductivity and high modulus carbon fiber fabric, and promotes the application of the high thermal conductivity and high modulus carbon fiber and its products.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a high thermal conductivity and high modulus carbon fiber fabric, wherein the carbon fiber fabric is made of high thermal conductivity and high modulus carbon fiber with a thermal conductivity of 500W / (m·K)-1000W / (m·K) and a modulus of 700GPa-960GPa, and the high thermal conductivity and high modulus carbon fiber undergoes a pre-sizing process before weaving.

[0006] Furthermore, the structure of the high thermal conductivity carbon fiber fabric is one of plain weave, twill weave and satin weave.

[0007] The present invention also provides a method for preparing a high thermal conductivity and high modulus carbon fiber fabric, the specific steps of which are as follows:

[0008] S1, warp yarn unwinding: unwinding the warp carbon fiber yarn from the multi-axis drum creel, and the unwound warp carbon fiber yarn passes through a smooth wire guide rod and is led out of the multi-axis drum creel by a wire guide rod combination;

[0009] S2, small angle wire collection: the warp carbon fiber yarns drawn out of the multi-axis drum creel are introduced into the wire guide holes of the wire collection plate, the inner wall of the wire guide holes is smooth, and the wire collection plate makes the width of the warp carbon fiber yarns the same as the final width of the fabric;

[0010] S3, large roller warping and warp tension control: the warp carbon fiber yarn after the yarn collection is introduced into the tension compensation device, and the tension compensation device warps the warp carbon fiber yarn and adjusts the micro tension of the warp carbon fiber yarn as a whole;

[0011] S4, heald lifting: the warp carbon fiber yarn passes through the tension compensation device into the braiding machine, and the warp carbon fiber yarn passes through the heald frame;

[0012] S5, weft insertion and beating-up: the weft yarn is placed on the weft yarn creel, the weft yarn is unwound from the weft yarn tube, the weft is inserted by a rigid rod, and the weft is beaten by a traditional beating-up method to obtain a high thermal conductivity and high modulus carbon fiber fabric;

[0013] After S6, the fabric is rolled up, and after obtaining the high thermal conductivity and high modulus carbon fiber fabric, it is rolled up using a fabric winding device.

[0014] Furthermore, in step S1, the multi-axis drum yarn frame adopts active wire release driven by a servo motor, and the multi-axis drum yarn frame is provided with yarn drums, a single yarn drum can be flexibly rotated, and the rotation flexibility of the yarn drum can be fine-tuned, the wire release angle is less than 10° during unwinding, and the wire release tension is less than 5N per axis.

[0015] Furthermore, in step S1, the wire guide rod combination includes a wire guide cross rod and a wire guide vertical rod, the wire guide vertical rod is multiple, the wire guide cross rod is arranged on the outside of the wire guide vertical rod, the diameter of the wire guide rod and the wire guide vertical rod is not less than 10 mm, and the diameter of the wire guide cross rod is not less than 30 mm; the wire guide rod, wire guide cross rod and wire guide vertical rod are all made of sandblasted hard chrome-plated material with a surface roughness of 3μm-10μm.

[0016] Furthermore, in step S2, the wire guide hole is circular, the curvature radius of the inner surface of the wire guide hole is not less than 15 mm, the inner surface of the wire guide hole is made of sandblasted hard chrome-plated material with a surface roughness of 3μm-10μm, and the angle between the warp carbon fiber yarn and the axial direction of the wire guide hole is less than 10°.

[0017] Furthermore, in step S3, the tension compensation device includes a front roller, a middle roller, a rear roller and a support frame, the front roller, the middle roller and the rear roller are all provided with bearings, the bearing of the middle roller is also provided with a spring, the surface roughness of the front roller, the middle roller and the rear roller is 3μm-10μm, and the diameter is not less than 60mm.

[0018] Furthermore, in step S4, the heald frame is lifted by mechanical slow lifting, the heald eye is made of ceramic material, the surface of the heald eye is sandblasted and hard chrome plated, the surface roughness of the heald eye is 3μm-10μm, the radius of curvature of the inner surface of the heald eye is not less than 5mm, and the maximum bending angle of the carbon fiber yarn at the heald eye is less than 5°. Furthermore, in step S6, when the fabric winding device is used for winding, release paper is also provided between adjacent fabric layers of the high thermal conductivity and high modulus carbon fiber fabric, and the release paper is used to avoid friction and extrusion between adjacent fabric layers to cause fabric damage.

[0019] Furthermore, in step S5, the warp carbon fiber yarn transmission speed is controlled by the fabric winding speed of the fabric winding device, and the weft yarn density is controlled by the fabric winding speed of the fabric winding device at each beating.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] Under the circumstance that it is difficult to weave high thermal conductivity and high modulus carbon fiber in the prior art, the present invention provides a method for preparing high thermal conductivity and high modulus carbon fiber fabric. By making the surfaces of the wire guide rods, the wire guide rod combination and the rolling shaft in the tension compensation device in the multi-axis drum yarn frame smooth, and the inner surfaces of the wire guide holes on the wire collecting plate and the heald eyes on the heald frame are also made smooth, so as to avoid excessive friction between the high thermal conductivity and high modulus carbon fiber bundles and the wire guide rods, the wire guide rod combination, the rolling shaft, the wire guide holes and the heald eyes when the high thermal conductivity and high modulus carbon fiber bundles pass through the above equipment during weaving, thereby avoiding the breakage and fuzzing of the high thermal conductivity and high modulus carbon fiber bundles, reducing the damage of the high thermal conductivity and high modulus carbon fiber in the weaving process, so that the high thermal conductivity and high modulus carbon fiber fabric can be smoothly woven, and the flatness of the fabric is improved, the performance retention rate of the carbon fiber in the carbon fiber cloth is improved (>90%), and the application of the high thermal conductivity and high modulus carbon fiber and its products is promoted.

[0022] In the preparation method of the present invention, the diameter of the wire guide rod in the wire release rack is not less than 10 mm, the diameter of the wire guide cross rod in the wire guide rod assembly is not less than 30 mm, and the diameter of the wire guide vertical rod is not less than 10 mm. By adopting a larger diameter, the generation of fuzzy and broken wires during the weaving of high thermal conductivity and high modulus carbon fiber can be reduced, thereby improving the quality of the obtained fabric.

[0023] In the preparation method of the present invention, the surface roughness of the wire guide rod, wire guide cross rod, wire guide vertical rod, wire guide hole, roller and heddle eye is 3μm-10μm, which avoids the adhesion of fibers on the surface of the equipment due to the equipment surface being too smooth or even mirror-like, and at the same time avoids fiber damage caused by excessive roughness of the equipment surface, thereby reducing the generation of fiber hairs and broken wires.

[0024] In the preparation method of the present invention, the curvature radius required for the wire guide hole and the heddle eye is greater than 15 mm and 5 mm respectively. By adopting a larger curvature radius, the bending of the fiber at the wire guide hole and the heddle eye is reduced, the generation of hairy wires and broken wires is reduced, and the performance retention rate of the fiber is increased as much as possible.

[0025] In the preparation method of the present invention, the tension compensation device uses a roller + spring method to compensate the tension of the high thermal conductivity and high modulus carbon fiber bundle. When weaving, the purpose of automatically compensating the tension of the high thermal conductivity and high modulus carbon fiber bundle is achieved, and the tightness and flatness of the high thermal conductivity and high modulus carbon fiber bundle are ensured.

[0026] The invention provides a high thermal conductivity and high modulus carbon fiber fabric, which is made of high thermal conductivity and high modulus carbon fiber with a thermal conductivity of 500W / (m·K)-1000W / (m·K) and a modulus of 700GPa-960GPa. The high thermal conductivity carbon fiber is subjected to a pre-sizing process before weaving to obtain the high thermal conductivity and high modulus carbon fiber fabric, which has excellent properties such as high thermal conductivity, ultra-high modulus, low expansion, light weight and high strength, and is one of the best structural and functional integrated materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The overall diagram of the weaving process of the present invention;

[0028] Figure 2 Structural diagram of guide wire rod assembly;

[0029] Figure 3 Wire collecting plate structure diagram;

[0030] Figure 4 Guide wire hole structure diagram;

[0031] Figure 5 Structural diagram of tension compensation device;

[0032] Figure 6 Schematic diagram of heald frame structure

[0033] Figure 7 Successful weaving effect diagram;

[0034] In the attached drawings: 10-carbon fiber yarn; 20-multi-axis drum yarn rack; 21-yarn drum; 22-wire guide rod; 30-wire guide rod assembly; 31-wire guide cross bar; 32-wire guide vertical rod; 40-wire collecting plate; 41-wire guide hole; 50-tension compensation device; 51-front roller; 52-middle roller; 53-rear roller; 54-support frame; 60 braiding machine; 61-heald frame; 62-heald eye; 62-roller; 70-fabric winding device; 80-carbon fiber yarn; 90-weft yarn rack; 91-yarn drum. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] The implementation methods of the present invention are not limited to the following embodiments, and any other changes, modifications, substitutions, combinations, simplifications, and fine-tuning that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

[0037] like Figures 1 to 7 As shown, the present invention provides a high thermal conductivity and high modulus carbon fiber fabric. The high thermal conductivity and high modulus carbon fiber fabric is made of high thermal conductivity carbon fiber with a thermal conductivity of 500W / (m·K)-1000W / (m·K) and a modulus of 700GPa-960GPa. The high thermal conductivity carbon fiber undergoes a pre-sizing process before weaving, and the sizing agent used has the properties of wear resistance and high toughness.

[0038] Preferably, Figure 7 As shown, the structure of the high thermal conductivity carbon fiber fabric is one of plain weave, twill weave and satin weave.

[0039] The present invention provides a weaving method for a high thermal conductivity and high modulus carbon fiber fabric, which is specifically as follows:

[0040] (1) Warp yarn unwinding. The warp carbon fiber yarn 10 is placed on a multi-axis drum creel 20. When unwinding, the unwinding angle is less than 10°, and the unwinding tension is less than 5N per axis. The single drum 21 on the creel can rotate flexibly, and its rotation flexibility can be fine-tuned. After the yarn is drawn, the tension of each bundle of warp carbon fiber yarn 10 is tested, and the tension of a single bundle of warp yarn is adjusted by the rotation flexibility of the drum 21 to keep the tension of each warp yarn consistent.

[0041] Preferably, the yarn tubes 21 of the multi-axis yarn rack 20 of the present invention should be manufactured to ensure flexible rotation without jamming. The total number of yarn tubes 21 is 500, and the number of yarn tubes 21 can also be adjusted according to actual conditions.

[0042] Preferably, the multi-axis bobbin creel 20 of the present invention adopts active wire unwinding driven by a servo motor.

[0043] Preferably, the present invention removes the wire guide hole at the front end of the multi-axis drum creel 20 and replaces it with a mutually perpendicular and rotatable wire guide rod assembly 30, and the warp carbon fiber yarn 10 is led out of the multi-axis drum creel 20 by the wire guide rod assembly 30, such as Figure 2 As shown, the wire guide rod assembly 30 includes a wire guide cross bar 31 and a wire guide vertical bar 32. There is one wire guide cross bar 31 and multiple wire guide vertical bars 32. The wire guide cross bar 31 is arranged on the outer side of the wire guide vertical bar 32, that is, on the side where the warp carbon fiber yarn 10 passes through the wire guide vertical bar 32. The wire guide rod assembly 30 can keep the warp carbon fiber yarn 10 flat and reduce the occurrence of fuzzy and broken wires when the warp carbon fiber yarn 10 passes through the wire guide hole.

[0044] Preferably, the diameter of the wire guide rod 22 and the wire guide vertical rod 32 is not less than 10 mm, the diameter of the wire guide cross rod 31 is not less than 30 mm, and the wire guide rod 22, the wire guide cross rod 31 and the wire guide vertical rod 32 are all made of sandblasted hard chrome-plated material with a surface roughness of 3μm-10μm.

[0045] (2) yarn collection. The warp carbon fiber yarn 10 is drawn out from the multi-axis drum creel 20 and passes through the yarn collection plate 40, so that the width of the warp carbon fiber yarn 10 is the same as the final width of the high thermal conductivity and high modulus carbon fiber fabric;

[0046] Preferably, Figure 3 , 4 As shown, a plurality of circular wire guide holes 41 are evenly distributed on the wire collecting plate 40, the inner wall of the wire guide hole 41 is smooth, the curvature radius of the contact surface between the wire guide hole 41 and the warp carbon fiber yarn 10 is not less than 15 mm, and the wire guide hole 41 is made of sandblasted hard chrome-plated material with a surface roughness of 3μm-10μm.

[0047] Preferably, the length between the multi-axis drum creel 20 and the wire collecting plate 40 is as long as possible, so that the axial angle between the warp carbon fiber yarn 10 and the wire guide hole 41 is less than 10 degrees.

[0048] (3) Warping and warp tension control. The warp carbon fiber yarn 10 is collected by the collecting plate 40 and then introduced into the tension compensation device 50. Figure 5 As shown, the tension compensation device 50 uses a roller plus spring method to compensate for the tension of the warp carbon fiber yarn 10. The tension compensation device 50 includes a front roller 51, a middle roller 52, a rear roller 53 and a support frame. The front roller 51, the middle roller 52 and the rear roller 53 are all provided with bearings. The bearing of the middle roller 52 is also provided with a spring. The warp carbon fiber yarn 10 is warped by three rollers, wherein the middle roller 52 can perform micro-tension adjustment on the entire warp yarn to offset the tension change of the warp yarn caused by the up and down floating of the heald frame during the subsequent lifting of the heald, and effectively avoid the problem of the warp carbon fiber yarn 10 being broken due to excessive tension or the fabric flatness being poor due to insufficient tension during the weaving process.

[0049] Preferably, the surface roughness of the front roller 51, the middle roller 52 and the back roller 53 is 3 μm-10 μm, and the diameter is not less than 60 mm.

[0050] (4) Lifting the heald. The warp carbon fiber yarn 10 is passed through the heald frame 61 with a special heald eye 62.

[0051] Preferably, the heald eye 62 provided on the heald frame 61 is composed of two upper and lower rollers, and the inner surface of the heald eye 62 needs to be smooth.

[0052] Preferably, Figure 6As shown, the heddle eye 62 is made of ceramic material, the surface of the heddle eye 62 is sandblasted and hard chrome plated, the surface roughness of the heddle eye 62 is 3μm-10μm, the curvature radius of the contact surface between the heddle eye 62 and the warp carbon fiber yarn 10 is not less than 5mm, and the maximum bending angle of the warp carbon fiber yarn 10 at the heddle eye 62 is less than 5°

[0053] (5) Weft insertion and beating-up. To reduce weft friction, the weft is unwound from the warp direction of the yarn tube 21, without passing through the weft accumulator, and is directly released by the rigid rod. The weft is beaten up by the traditional beating-up method, and the weft density is set to 33 bundles / 10 cm. The weft density is controlled by the fabric winding speed of the fabric winding device 70 at each beating-up.

[0054] (6) Fabric winding. After obtaining the high thermal conductivity and high modulus carbon fiber fabric, the fabric winding device 70 is used to wind it up. The fabric winding speed of the fabric winding device 70 controls the transmission speed of the warp carbon fiber yarn 10, thereby controlling the density of the weft yarn. Since the present invention uses carbon fiber yarn to weave the high thermal conductivity and high modulus carbon fiber fabric, release paper is added between adjacent fabric layers when the fabric is rolled up. The release paper can prevent the friction and extrusion between adjacent fabric layers from causing damage to the carbon fiber yarn.

[0055] Preferably, the weft yarn is also a carbon fiber yarn. When the warp carbon fiber yarn 10 and the weft yarn are woven in the weaving machine 60, a mechanical slow shedding method is used for lifting the shedding. The lifting method can adjust and control the shedding speed and the lifting amplitude to avoid the brittle breakage of the high thermal conductivity and high modulus carbon fiber warp yarn due to excessively fast lifting speed and excessively large warp opening angle.

[0056] Preferably, the dustproof level of the electrical equipment in the weaving system provided by the present invention is above IP65, which prevents the hair generated by the high thermal conductivity and high modulus carbon fiber during the weaving process from entering the interior of the electrical equipment, causing a short circuit in the electrical equipment, causing damage to the electrical equipment, and increasing the equipment cost.

[0057] Preferably, the maximum width of the braiding machine 60 is 2 m, which can be set according to demand.

[0058] The following is an actual use example of a high thermal conductivity and high modulus carbon fiber fabric weaving device provided by the present invention:

[0059] Example 1

[0060] High thermal conductivity and high modulus carbon fiber with a thermal conductivity of 500W / (m·K) and a modulus of 800GPa is used as the warp and weft yarns for weaving plain carbon cloth. The linear density of the carbon fiber warp and weft yarns is 0.23g / m, the warp and weft density is 42 bundles / 10cm, the width is 500mm, and the number of warp axes is 210 axes.

[0061] The above-mentioned preparation method is adopted for weaving, wherein the diameters of the wire guide rod 22 and the wire guide rod 32 are 10 mm, the diameter of the wire guide rod 32 is 30 mm, the curvature radius of the contact surface between the wire guide hole 41 and the warp carbon fiber yarn 10 is 15 mm, and a sandblasted hard chrome-plated material with a surface roughness of 5 μm is used; the surface of the heddle eye 62 is sandblasted and hard chrome-plated, and the surface roughness is 10 μm, and the curvature radius of the contact surface between the heddle eye 62 and the warp is 5 mm; the surface of the front roller 51, the middle roller 52 and the rear roller 53 is sandblasted and hard chrome-plated, and the surface roughness is 10 μm and the diameter is 60 mm.

[0062] This method can be used to successfully weave high thermal conductivity and high modulus carbon fiber fabric without yarn breakage. After weaving, the width of the high thermal conductivity and high modulus carbon fiber fabric obtained is 500mm and the surface density is 190g / m 2 , with high modulus and high thermal conductivity in two orthogonal directions. The mechanical and thermal conductivity of the yarn before and after weaving were tested to characterize the performance retention rate of the yarn.

[0063] Table 1 Mechanical and thermal conductivity performance data of yarn before and after weaving

[0064]

[0065] In order to characterize the performance retention rate of carbon fiber after weaving, the present invention tests the mechanical properties and thermal conductivity of a single bundle of carbon fiber yarn before weaving; as a comparison, the yarn is carefully pulled out of the fabric after weaving, and the mechanical properties and thermal conductivity are tested; the test results are shown in Table 1. It can be concluded from the test results that the mechanical properties of the fiber decrease slightly after weaving, and the fiber performance retention rate is above 94%, indicating that the preparation method of the present invention can reduce the wear of the fiber during the weaving process and the generation of excessive bending angles, reduce the generation of broken wires and hairy wires, and thus achieve the successful weaving of high thermal conductivity and high modulus carbon fiber, while ensuring a high performance retention rate of the fiber.

Claims

1. A method for preparing a high thermal conductivity and high modulus carbon fiber fabric, characterized in that: The specific steps are as follows: S1, warp yarn unwinding: unwinding the warp carbon fiber yarn (10) from the multi-axis drum creel (20), and the unwound warp carbon fiber yarn (10) passes through a smooth wire guide rod (22) and is then led out of the multi-axis drum creel (20) by a wire guide rod assembly (30); S2, small angle wire collection: the warp carbon fiber yarn (10) drawn out of the multi-axis tube creel (20) is introduced into the wire collection plate (40) A wire guide hole (41) having a smooth inner wall; S3, large roller warping and warp tension control: the warp carbon fiber yarn (10) after the yarn collection is introduced into the tension compensation device (50), and the tension compensation device (50) warps the warp carbon fiber yarn (10) to adjust the micro tension of the warp carbon fiber yarn (10) as a whole; S4, heald lifting: the warp carbon fiber yarn (10) passes through the tension compensation device (50) and enters the braiding machine (60), and the warp carbon fiber yarn (10) passes through the heald frame (61); S5, weft insertion and weft beating: the weft yarn (80) is placed on a weft yarn frame (90), the weft yarn (80) is unwound from a weft yarn tube (91), the weft yarn is inserted by a rigid rod, and the weft yarn is beaten by a traditional weft beating method to obtain a high thermal conductivity and high modulus carbon fiber fabric; S6, fabric winding: after obtaining the high thermal conductivity and high modulus carbon fiber fabric, a fabric winding device (70) is used to wind it up; In step S1, the wire guide rod assembly (30) comprises a wire guide cross rod (31) and a wire guide vertical rod (32), wherein the wire guide vertical rod (32) is multiple, and the wire guide cross rod (31) is arranged on the outside of the wire guide vertical rod (32), the diameter of the wire guide rod (22) and the wire guide vertical rod (32) is not less than 10 mm, and the diameter of the wire guide cross rod (31) is not less than 30 mm; the wire guide rod (22), the wire guide cross rod (31) and the wire guide vertical rod (32) are all made of sandblasted hard chrome-plated material with a surface roughness of 3 μm-10 μm; In step S2, the wire guide hole (41) is circular, the surface curvature radius of the inner surface of the wire guide hole (41) is not less than 15 mm, the inner surface of the wire guide hole (41) is made of a sandblasted hard chrome-plated material with a surface roughness of 3 μm-10 μm, and the angle between the warp carbon fiber yarn (10) and the axial direction of the wire guide hole (41) is less than 10°; In step S3, the tension compensation device (50) comprises a front roller (51), a middle roller (52), a rear roller (53) and a support frame (54), the front roller (51), the middle roller (52) and the rear roller (53) are all provided with bearings, the bearing of the middle roller (52) is also provided with a spring, the surface roughness of the front roller (51), the middle roller (52) and the rear roller (53) is 3 μm-10 μm, and the diameter is not less than 60 mm; In step S4, the heald frame (61) is lifted in a mechanical slow lifting manner, the heald eye (62) is made of ceramic material, the surface of the heald eye (62) is sandblasted and hard chrome plated, the surface roughness of the heald eye (62) is 3μm-10μm, the radius of curvature of the inner surface of the heald eye (62) is not less than 5mm, and the maximum bending angle of the carbon fiber yarn (10) at the heald eye (62) is less than 5°; In step S6, when the fabric winding device (70) is used for winding, release paper is provided between adjacent fabric layers of the high thermal conductivity and high modulus carbon fiber fabric, and the release paper is used to prevent damage to the fabric caused by friction and extrusion between adjacent fabric layers; In step S5, the transmission speed of the warp carbon fiber yarn (10) is controlled by the fabric winding speed of the fabric winding device (70), and the weft density is controlled by the fabric winding speed of the fabric winding device (70) at each weft beating.

2. The method for preparing a high thermal conductivity and high modulus carbon fiber fabric according to claim 1, characterized in that: In step S1, the multi-axis drum yarn rack (20) is driven by a servo motor for active wire release. The multi-axis drum yarn rack (20) is provided with a yarn drum (21). A single yarn drum (21) can be flexibly rotated, and the rotation flexibility of the yarn drum (21) can be finely adjusted. When unwinding, the wire release angle is less than 10°, and the wire release tension is less than 5N per axis.

3. A high thermal conductivity and high modulus carbon fiber fabric prepared by the preparation method according to claim 1, characterized in that: The carbon fiber fabric is made of high thermal conductivity and high modulus carbon fiber with a thermal conductivity of 500 W / (m·K)-1000 W / (m·K) and a modulus of 700 GPa-960 GPa. The high thermal conductivity and high modulus carbon fiber undergoes a pre-sizing process before weaving.

4. The high thermal conductivity and high modulus carbon fiber fabric according to claim 3, characterized in that: The structure of the high thermal conductivity and high modulus carbon fiber fabric is one of plain weave, twill weave and satin weave.

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