Waterproof tear-resistant carbon fiber fabric and preparation method thereof

Abstract

The invention relates to a waterproof tear-resistant carbon fiber fabric and a preparation method thereof. The fabric comprises a bottom layer, a surface layer and a tear-resistant middle layer arranged between the bottom layer and the surface layer, the anti-tearing middle layer comprises a first concave-convex connecting layer and a second concave-convex connecting layer which are arranged on the opposite faces of the bottom layer and the surface layer respectively, concave parts of the first concave-convex connecting layer and the second concave-convex connecting layer correspond to each other to form a cavity, and convex parts of the first concave-convex connecting layer and the second concave-convex connecting layer correspond to each other to form a hot-pressing section; a first supporting piece and a second supporting piece are horizontally arranged in the cavity in a diagonal mode. According to the invention, the supporting member with a stable structure is formed between the concave-convex connecting layer I and the concave-convex connecting layer II through the supporting member I, the supporting member II, the reinforcing layer I, the reinforcing layer II, the connecting member I and the reinforcing layer III, so that the fabric has better tear resistance, and the down-proof performance of the fabric can be improved through the arrangement of the supporting member.

Description

Technical Field

[0001] The invention belongs to the technical field of clothing fabrics, and in particular relates to a waterproof and tear-resistant carbon fiber fabric and a preparation method thereof. Background Art

[0002] Down jackets play a vital role in cold seasons and are widely welcomed for their excellent warmth retention and lightness. The waterproof performance of down jackets is generally achieved by treating the fabric with a three-proof finishing agent, thereby forming a waterproof, oil-proof and anti-fouling coating on the surface of the fabric. In addition, down jackets are also required to have good tear resistance and anti-down drilling performance. The wearing environment of down jackets is relatively complex. In order to avoid or reduce the occurrence of rupture and tearing, the down jacket fabric is required to have good tear resistance. The key to keeping warm in down jackets is to fill them with down. Therefore, the down jacket fabric must also have good anti-down drilling performance to reduce the occurrence of down drilling and running during daily wearing and washing. In the prior art, the tear resistance and anti-down drilling performance of the fabric are mostly improved by treating it with a finishing agent, while there is less research and design on the fabric structure. Therefore, the present application provides a waterproof and tear-resistant carbon fiber fabric and a preparation method thereof to solve the above-mentioned technical problems. Summary of the invention

[0003] The purpose of the present invention is to provide a waterproof and tear-resistant carbon fiber fabric and a preparation method thereof in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0005] A waterproof and tear-resistant carbon fiber fabric and a preparation method thereof, comprising a bottom layer, a surface layer and a tear-resistant middle layer arranged between the bottom layer and the surface layer;

[0006] The tear-resistant middle layer comprises a concave-convex connection layer 1 and a concave-convex connection layer 2 respectively arranged on opposite sides of the bottom layer and the surface layer, wherein the concave parts of the concave-convex connection layer 1 and the concave-convex connection layer 2 correspond to each other to form a cavity, and the convex parts correspond to each other to form a hot pressing section, and the support member 1 and the support member 2 are horizontally arranged in a diagonal manner in the cavity;

[0007] The support member 1 and the support member 2 both include a fixing section connected to the inner wall of the concave-convex connection layer 1 or the concave-convex connection layer 2 and a stitching section horizontally stacked and placed in the cavity. The stitching sections of the support member 1 and the support member 2 are respectively sewn with carbon fiber threads to form the reinforcement layer 1 and the reinforcement layer 2.

[0008] As a further optimization scheme of the present invention, the inner walls of the concave-convex connecting layer 1 and the concave-convex connecting layer 2 are symmetrically provided with connecting pieces 1, the stitching section of the supporting piece 1 and the supporting piece 2 is located between the two connecting pieces 1, and the upper and lower connecting pieces 1 and the middle part of the stitching section of the supporting piece 1 and the supporting piece 2 are sewn with carbon fiber thread to form a reinforcement layer 3 with a ring-shaped cross-section.

[0009] As a further optimization solution of the present invention, the concave-convex connecting layer 1, the concave-convex connecting layer 2, the supporting member 1, the supporting member 2, and the connecting member 1 are all made of polyamide material or polypropylene material.

[0010] As a further optimization solution of the present invention, the cross sections of the reinforcement layer 1 and the reinforcement layer 2 are parallel to each other or cross-shaped to each other.

[0011] A method for preparing a waterproof and tear-resistant carbon fiber fabric, the specific steps are as follows:

[0012] Step 1: forming a waterproof layer on the surface of the surface layer by a three-proof finishing agent, and forming a concave-convex connecting layer 1, a concave-convex connecting layer 2, a supporting member 1, a supporting member 2, and a connecting member 1 on the surface of the bottom layer and the surface layer by a mold, wherein the supporting member 1 and the supporting member 2 both include a fixed section connected to the inner wall of the concave-convex connecting layer 1 or the concave-convex connecting layer 2 and a movably arranged sewing section;

[0013] Step 2: Place the bottom layer and the surface layer with the concave-convex connecting layer 1 and the concave-convex connecting layer 2 on one side symmetrically to each other, so that the concave parts and the convex parts of the concave-convex connecting layer 1 and the concave-convex connecting layer 2 correspond to each other respectively, and place the stitched sections of the support member 1 and the support member 2 horizontally overlapped up and down, and sew the stitched sections of the support member 1 and the support member 2 together through carbon fiber lines to form reinforcement layer 1 and reinforcement layer 2 respectively, and then sew the upper and lower connecting members 1 and the middle parts of the stitched sections of the reinforcement layer 1 and the reinforcement layer 2 together through carbon fiber lines to form reinforcement layer 3 with a circular cross-section;

[0014] Step 3: Fix the bottom layer, the surface layer, the concave-convex connection layer 1 and the concave-convex connection layer 2 together by heat pressing only along the convex parts of the concave-convex connection layer 1 and the concave-convex connection layer 2.

[0015] As a further optimization scheme of the present invention, in step two, the sewing section of the support member one located below is placed above the sewing section of the support member two located above, and the sewing sections of the support member one and the support member two are placed horizontally stacked up and down.

[0016] As a further optimization scheme of the present invention, in step three, the pressure of the hot pressing treatment is 5-7 MPa, the temperature is 125-140° C., the number of hot pressing times is 2-5 times, and the time of each hot pressing is 3-5 minutes.

[0017] The beneficial effects of the present invention are:

[0018] 1) The present invention forms a structurally stable support component between the concave-convex connection layer 1 and the concave-convex connection layer 2 through support member 1, support member 2, reinforcement layer 1, reinforcement layer 2, connector 1 and reinforcement layer 3, so that the fabric has better tear resistance, and the setting of the support component can also improve the anti-down performance of the fabric.

[0019] 2) The present invention supports the overall structural stability of the tear-resistant middle layer by forming mutual pressure between the upper and lower layers by support member 1 and support member 2, sews the stitching sections of support member 1 and support member 2 together by reinforcement layer 1 and reinforcement layer 2, and sews support member 1, support member 2 and the upper and lower connecting member 1 together by reinforcement layer 3, so that a more stable supporting and pressing effect is formed between the concave-convex connecting layer 1 and the concave-convex connecting layer 2, which can better improve the stability of the overall structure of the tear-resistant middle layer, thereby improving the tear resistance and anti-down drilling performance of the fabric, and can also ensure that the fabric can still maintain good tear resistance and anti-down drilling effects after multiple washings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the cross section of the waterproof and tear-resistant carbon fiber fabric of Example 1 of the present invention.

[0021] Figure 2 Schematic diagram of the cross section of the tear-resistant middle layer of Example 1 of the present invention.

[0022] Figure 3 Schematic cross-sectional view of the tear-resistant middle layer of Example 2 of the present invention.

[0023] Figure 4 The present invention Figure 3 Schematic diagram of part of the structure.

[0024] Figure 5 It is a schematic cross-sectional view of the tear-resistant middle layer of Comparative Example 1 of the present invention.

[0025] Figure 6 It is a schematic cross-sectional view of the tear-resistant middle layer of Comparative Example 2 of the present invention.

[0026] Figure 7 It is a schematic cross-sectional view of the tear-resistant middle layer of Comparative Example 3 of the present invention.

[0027] In the figure: 1, bottom layer; 2, tear-resistant middle layer; 21, concave-convex connection layer one; 22, concave-convex connection layer two; 23, support member one; 24, support member two; 25, reinforcement layer one; 26, reinforcement layer two; 27, connection member one; 28, reinforcement layer three; 3, surface layer. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] 1. Materials

[0030] 1. In this application, the bottom layer 1 is a commercially available pure cotton fabric, and the surface layer 3 is a commercially available 180T polyester pongee fabric.

[0031] 2. The carbon fiber yarn in this application is a carbon fiber polyester twisted yarn purchased from Dongguan Yushun Textile Co., Ltd.

[0032] 3. In order to achieve a waterproof effect in this application, the surface of the commercially available 180T polyester pongee fabric as the surface layer 3 is treated with a triple-proof treatment agent of model BAYGARD C LEAN purchased from Wujiang Jincheng Fine Chemical Co., Ltd. to obtain a triple-proof coating (waterproof, oil-proof and anti-fouling coating).

[0033] Unless otherwise specified, the methods used in this example are all known to those skilled in the art, and are conventional methods. The reagents and other materials used are all commercially available products unless otherwise specified.

[0034] 2. Methods

[0035] In order to explore the effects of different structural designs of the tear-resistant middle layer 2 on the tear resistance and anti-down performance of the waterproof and tear-resistant carbon fiber fabric, the technical solutions of the following embodiments 1-2 and comparative examples 1-3 were designed, as shown below:

[0036] Example 1

[0037] like Figure 1-2 As shown, a waterproof and tear-resistant carbon fiber fabric comprises a bottom layer 1, a surface layer 3 and a tear-resistant middle layer 2 arranged between the bottom layer 1 and the surface layer 3;

[0038] The tear-resistant middle layer 2 comprises a concave-convex connection layer 1 21 and a concave-convex connection layer 2 22 respectively arranged on opposite sides of the bottom layer 1 and the surface layer 3, wherein the concave parts of the concave-convex connection layer 1 21 and the concave-convex connection layer 2 22 correspond to each other to form a cavity, and the convex parts correspond to each other to form a hot pressing section, and a support member 1 23 and a support member 2 24 are horizontally arranged in a diagonal manner in the cavity;

[0039] The support member 1 23 and the support member 2 24 both include a fixing section connected to the inner wall of the concave-convex connection layer 1 21 or the concave-convex connection layer 2 22 and a stitching section horizontally stacked and placed in the cavity. The stitching sections of the support member 1 23 and the support member 2 24 are respectively sewn with carbon fiber thread to form a reinforcement layer 1 25 and a reinforcement layer 2 26.

[0040] Furthermore, the inner walls of the concave-convex connecting layer 1 21 and the concave-convex connecting layer 2 22 are symmetrically provided with connecting pieces 27, the stitching section of the supporting piece 1 23 and the supporting piece 2 24 is located between the two connecting pieces 27, and the upper and lower connecting pieces 27 and the middle part of the stitching section of the supporting piece 1 23 and the supporting piece 2 24 are sewn with carbon fiber thread to form a reinforcement layer 3 28 with a ring-shaped cross-section.

[0041] Furthermore, the concave-convex connection layer 1 21, the concave-convex connection layer 2 22, the support member 1 23, the support member 24, and the connection member 1 27 are all made of polyamide material or polypropylene material.

[0042] In this embodiment, the cross sections of the reinforcement layer 1 25 and the reinforcement layer 2 26 are parallel to each other.

[0043] A method for preparing a waterproof and tear-resistant carbon fiber fabric, the specific steps are as follows:

[0044] Step 1: a waterproof layer is formed on the surface of the surface layer 3 by a three-proof finishing agent, and a concave-convex connecting layer 1 21, a concave-convex connecting layer 2 22, a supporting member 1 23, a supporting member 24, and a connecting member 1 27 are formed on the surface of the bottom layer 1 and the surface layer 3 by a mold, wherein the supporting member 1 23 and the supporting member 2 24 both include a fixed section connected to the inner wall of the concave-convex connecting layer 1 21 or the concave-convex connecting layer 2 22 and a movably arranged sewing section;

[0045] It should be noted that in step 1 of this embodiment, the fixed section of the support member 1 23 on the concave-convex connection layer 1 21 is fixedly connected to the bottom wall and the side wall of the concave portion of the concave-convex connection layer 1 21, and the fixed section of the support member 2 24 on the concave-convex connection layer 2 22 is fixedly connected to the top and the side wall of the concave portion of the concave-convex connection layer 2 22;

[0046] Step 2: The bottom layer 1 and the surface layer 3 are symmetrically placed on one side with the concave-convex connecting layer 1 21 and the concave-convex connecting layer 2 22, so that the concave parts and the convex parts of the concave-convex connecting layer 1 21 and the concave-convex connecting layer 2 22 correspond to each other respectively, and the stitching sections of the support member 1 23 and the support member 2 24 are horizontally overlapped and placed up and down, and the stitching sections of the support member 1 23 and the support member 2 24 are stitched and fixed together by carbon fiber lines to form a reinforcement layer 1 25 and a reinforcement layer 2 26 respectively, and then the upper and lower connecting members 1 27 and the middle parts of the stitching sections of the reinforcement layer 1 25 and the reinforcement layer 2 26 are stitched and fixed together by carbon fiber lines to form a reinforcement layer 3 28 with a circular cross-section;

[0047] It should be noted that in step 2 of this embodiment, the sewing section of the support member 1 23 located at the bottom is placed above the sewing section of the support member 2 24 located at the top, and the sewing sections of the support member 1 23 and the support member 2 24 are placed horizontally stacked up and down, that is, Figure 1-4 As shown, the support member 1 23 and the support member 2 24 are connected and pressed against each other up and down by the sewing section;

[0048] Step 3: hot-press and fix the bottom layer 1, the surface layer 3, the concave-convex connecting layer 1 21, and the concave-convex connecting layer 2 22 together along the convex parts of the concave-convex connecting layer 1 21 and the concave-convex connecting layer 2 22;

[0049] It should be noted that in step three of this embodiment, the pressure of the hot pressing treatment is 6 MPa, the temperature is 132° C., the number of hot pressing times is 4 times, and the time of each hot pressing is 4 minutes.

[0050] Example 2

[0051] like Figure 1 , 3 As shown in 4, a waterproof and tear-resistant carbon fiber fabric is different from Example 1 in that, in this embodiment, the cross-sections of the reinforcement layer 1 25 and the reinforcement layer 2 26 are mutually crossed, and the rest are consistent with Example 1.

[0052] Comparative Example 1

[0053] like Figure 5 As shown, a waterproof and tear-resistant carbon fiber fabric is different from Example 2 in that, in this comparative example, the tear-resistant middle layer 2 does not have the structural design of a connecting piece 27 and a reinforcement layer 3 28, and the rest are consistent with Example 2.

[0054] Comparative Example 2

[0055] like Figure 6 As shown, a waterproof and tear-resistant carbon fiber fabric is different from Example 2 in that, in this comparative example, the tear-resistant middle layer 2 does not have the structural design of reinforcement layer 1 25, reinforcement layer 2 26, connecting piece 1 27 and reinforcement layer 3 28.

[0056] Comparative Example 3

[0057] like Figure 7 As shown, a waterproof and tear-resistant carbon fiber fabric is different from Example 2 in that, in this comparative example, the tear-resistant middle layer 2 does not have the structural design of support member 1 23, support member 2 24, reinforcement layer 1 25, reinforcement layer 2 26, connecting member 1 27 and reinforcement layer 3 28, and the rest are consistent with Example 2.

[0058] 3. Performance Test Experiment

[0059] The fabrics used in the following tear resistance performance test and anti-down performance test are the unwashed waterproof and tear-resistant carbon fiber fabrics of Examples 1-2 and Comparative Examples 1-3 and the waterproof and tear-resistant carbon fiber fabrics of Examples 1-2 and Comparative Examples 1-3 washed 35 times (washed 35 times in a drum washing machine with a rotation speed of 1200 r / min, each washing time being 25 minutes).

[0060] Tear resistance test: Experimental equipment: Q800 dynamic mechanical analyzer (DMA, TA Instruments, Inc., USA), experimental method, take the waterproof and tear-resistant carbon fiber fabrics of the above-mentioned Examples 1-2 and Comparative Examples 1-2 as samples, the sample specifications are 230×210mm strips, the samples are placed in a tensile fixture, one end is fixed, and the other end can move with the fixture, the temperature is 22°C±3°C, the frequency is set to 3Hz, the applied stress is gradually increased from 0 at a speed of 4MPa / s, and the sample strain change is recorded until the sample breaks, and the stress at the breaking point is taken as the sample tensile strength. The test data are shown in Table 1:

[0061] Table 1 Tear resistance test data

[0062]

[0063]

[0064] Experimental conclusion: It can be seen from the data of Examples 1 and 2 in Table 1 that the fabrics prepared in Examples 1 and 2 have good tear resistance, among which the effect of Example 2 is better;

[0065] By comparing the data of Example 2 with the data of Comparative Examples 1-3, it can be learned that the structural design of support member 1 23 and support member 2 24 forms a mutual pressure between the upper and lower layers, that is, support member 1 23 presses support member 2 24 downward, and support member 2 24 presses support member 1 23 upward, forming a balanced pressure between each other, thereby supporting the overall structural stability of the tear-resistant middle layer 2. The stitching sections of support member 1 23 and support member 2 24 are sewn together by reinforcement layer 1 25 and reinforcement layer 2 26, which can further improve the structural stability between support member 1 23 and support member 2 24, thereby improving the overall structural stability of the tear-resistant middle layer 2, and then the reinforcement layer 3 28 is used to reinforce the support member 1 23 and support member 2 24. The support member 23, the support member 24 and the upper and lower connecting members 27 are sewn and fixed, so that a more stable supporting and pressing effect is formed between the concave-convex connecting layer 1 21 and the concave-convex connecting layer 2 22, which can better improve the stability of the overall structure of the tear-resistant middle layer 2. The structural design of the connecting member 27 and the reinforcement layer 3 28 can further improve the stability of the overall structure of the tear-resistant middle layer 2, thereby improving the tear resistance of the fabric. The structural design of the support member 23, the support member 24, the reinforcement layer 1 25, the reinforcement layer 2 26, the connecting member 27 and the reinforcement layer 3 28 can not only improve the tear resistance, but also ensure that the fabric can maintain a good tear resistance after multiple washings.

[0066] Anti-down drilling performance test: According to the national standard GB / T12705.2-2009 "Test method for anti-down leakage of textile fabrics Part 2: Transfer box method", the anti-down drilling performance of the fabric is tested. When the number of down drilling roots of the fabric is greater than 15, the anti-down drilling performance is poor; when the number of down drilling roots is 5<≤15, it has anti-down drilling performance; when the number of down drilling roots is ≤5, it has good anti-down drilling performance. The test data is shown in Table 2:

[0067] Table 2 Anti-drilling performance test data table

[0068]

[0069] Experimental conclusion: Compared with comparative examples 1-3, the fabrics prepared in Examples 1 and 2 have better anti-down drilling effect, wherein the stitching sections of the support member 23 and the support member 24 are arranged parallel to each other, and the cavity formed between the concave parts of the concave-convex connecting layer 1 21 and the concave-convex connecting layer 2 22 is divided into multiple spaces, which can improve the anti-down drilling effect of the fabric. The reinforcement layer 1 25 and the reinforcement layer 2 26 are used to tightly connect the stitching sections between the support member 23 and the support member 2 24, so that after subsequent multiple washings, the overall structure of the tear-resistant middle layer 2 of the fabric can be kept relatively stable, thereby improving the durability of the anti-down drilling effect of the fabric. The upper and lower connecting members 27 and the stitching sections between the support member 23 and the support member 2 24 are connected and fixed by the reinforcement layer 3 28, which can firstly divide the cavity into more spaces, and secondly, keep the overall structure of the tear-resistant middle layer 2 of the fabric relatively stable, thereby improving the anti-down drilling effect of the fabric and the durability of the anti-down drilling effect.

[0070] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A waterproof and tear-resistant carbon fiber fabric, characterized in that: The invention comprises a bottom layer (1), a surface layer (3) and a tear-resistant middle layer (2) arranged between the bottom layer (1) and the surface layer (3). The tear-resistant middle layer (2) comprises a concave-convex connection layer 1 (21) and a concave-convex connection layer 2 (22) respectively arranged on opposite sides of the bottom layer (1) and the surface layer (3), wherein the concave parts of the concave-convex connection layer 1 (21) and the concave-convex connection layer 2 (22) correspond to each other to form a cavity, and the convex parts correspond to each other to form a hot pressing section, and a support member 1 (23) and a support member 2 (24) are horizontally arranged in a diagonal manner in the cavity; The support member 1 (23) and the support member 2 (24) both include a fixing section connected to the inner wall of the concave-convex connection layer 1 (21) or the concave-convex connection layer 2 (22) and a stitching section horizontally stacked and placed in the cavity, and the stitching sections of the support member 1 (23) and the support member 2 (24) are respectively sewn with carbon fiber threads to form a reinforcement layer 1 (25) and a reinforcement layer 2 (26).

2. The waterproof and tear-resistant carbon fiber fabric according to claim 1, characterized in that: The inner walls of the concave-convex connecting layer 1 (21) and the concave-convex connecting layer 2 (22) are symmetrically provided with connecting pieces 1 (27) in the upper and lower parts, the stitching section of the supporting piece 1 (23) and the supporting piece 2 (24) is located between the two connecting pieces 1 (27), and the middle part of the stitching section of the two upper and lower connecting pieces 1 (27) and the supporting piece 1 (23) and the supporting piece 2 (24) is sewn with carbon fiber thread to form a reinforcing layer 3 (28) with a ring-shaped cross section.

3. The waterproof and tear-resistant carbon fiber fabric according to claim 2, characterized in that: The concave-convex connecting layer 1 (21), the concave-convex connecting layer 2 (22), the supporting member 1 (23), the supporting member 2 (24), and the connecting member 1 (27) are all made of polyamide material or polypropylene material.

4. A waterproof and tear-resistant carbon fiber fabric according to any one of claims 1 to 3, characterized in that: The cross sections of the reinforcement layer 1 (25) and the reinforcement layer 2 (26) are parallel to each other or cross-shaped.

5. A method for preparing the waterproof and tear-resistant carbon fiber fabric according to any one of claims 1 to 4, characterized in that: The specific steps are as follows: Step 1: forming a waterproof layer on the surface of the surface layer (3) by using a three-proof finishing agent, and forming a concave-convex connecting layer 1 (21), a concave-convex connecting layer 2 (22), a supporting member 1 (23), a supporting member 2 (24), and a connecting member 1 (27) on the surface of the bottom layer (1) and the surface layer (3) by using a mold for integral molding, wherein the supporting member 1 (23) and the supporting member 2 (24) both include a fixed section connected to the inner wall of the concave-convex connecting layer 1 (21) or the inner wall of the concave-convex connecting layer 2 (22) and a movably arranged sewing section; Step 2: The bottom layer (1) and the surface layer (3) having the concave-convex connecting layer 1 (21) and the concave-convex connecting layer 2 (22) are symmetrically placed, so that the concave parts and the convex parts of the concave-convex connecting layer 1 (21) and the concave-convex connecting layer 2 (22) correspond to each other respectively, and the stitching sections of the support member 1 (23) and the support member 2 (24) are horizontally overlapped and placed up and down, and the stitching sections of the support member 1 (23) and the support member 2 (24) are stitched together by carbon fiber wire to form a reinforcement layer 1 (25) and a reinforcement layer 2 (26) respectively, and then the upper and lower connecting members 1 (27) and the middle parts of the stitching sections of the reinforcement layer 1 (25) and the reinforcement layer 2 (26) are stitched together by carbon fiber wire to form a reinforcement layer 3 (28) with a circular cross section; Step three: fix the bottom layer (1), the surface layer (3), the concave-convex connecting layer 1 (21), and the concave-convex connecting layer 2 (22) together by heat pressing only along the convex parts of the concave-convex connecting layer 1 (21) and the concave-convex connecting layer 2 (22).

6. The waterproof and tear-resistant carbon fiber fabric and the preparation method thereof according to claim 5, characterized in that: In step 2, the sewing section of the support member 1 (23) located below is placed above the sewing section of the support member 2 (24) located above, and the sewing sections of the support member 1 (23) and the support member 2 (24) are placed horizontally stacked up and down.

7. The waterproof and tear-resistant carbon fiber fabric and the preparation method thereof according to claim 5, characterized in that: In step three, the pressure of the hot pressing treatment is 5-7 MPa, the temperature is 125-140° C., the number of hot pressing times is 2-5 times, and the time of each hot pressing is 3-5 minutes.

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