A waterproof and tear-resistant carbon fiber fabric and its preparation method

Abstract

This invention relates to a waterproof and tear-resistant carbon fiber fabric and its preparation method. The fabric includes a bottom layer, a top layer, and a tear-resistant middle layer disposed between the bottom layer and the top layer. The tear-resistant middle layer includes a first concave-convex connecting layer and a second concave-convex connecting layer, respectively disposed on opposite sides of the bottom layer and the top layer. The concave portions of the first and second concave-convex connecting layers correspond to each other to form cavities, and the convex portions correspond to each other to form hot-pressed sections. Support member one and support member two are horizontally arranged diagonally within the cavities. This invention forms a structurally stable support component between the first and second concave-convex connecting layers through support member one, support member two, reinforcement layer one, reinforcement layer two, connector one, and reinforcement layer three, giving the fabric good tear resistance. Furthermore, the inclusion of this support component also improves the fabric's down-proof performance.

Description

Technical Field

[0001] This invention belongs to the field of clothing fabric technology, specifically relating to a waterproof and tear-resistant carbon fiber fabric and its preparation method. Background Technology

[0002] Down jackets play a vital role in cold seasons, widely popular for their superior warmth and lightweight design. The waterproofing of down jackets is typically achieved through treatment with a three-proof finishing agent, forming a waterproof, oil-proof, and stain-resistant coating on the fabric surface. Additionally, down jackets require good tear resistance and down-proof properties. Given the complex environments in which down jackets are worn, good tear resistance is essential to prevent or reduce tearing. Since the key to warmth and insulation lies in the down filling, the fabric also needs good down-proof properties to minimize down leakage during daily wear and washing. Current technologies primarily improve tear resistance and down-proof properties through finishing agents, with limited research and design on fabric structure. Therefore, this application provides a waterproof and tear-resistant carbon fiber fabric and its preparation method to address the aforementioned technical problems. Summary of the Invention

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

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A waterproof and tear-resistant carbon fiber fabric and its preparation method, comprising a bottom layer, a top layer, and a tear-resistant middle layer disposed between the bottom layer and the top layer;

[0006] The tear-resistant middle layer includes a concave-convex connecting layer one and a concave-convex connecting layer two respectively disposed on opposite sides of the bottom layer and the top layer. The concave portions of the concave-convex connecting layer one and the concave-convex connecting layer two correspond to each other to form a cavity, and the convex portions correspond to each other to form a hot-pressing section. The cavity is provided with support member one and support member two in a diagonal horizontal arrangement.

[0007] Both the support member one and the support member two include a fixed section connected to the inner wall of the concave-convex connection layer one or the concave-convex connection layer two, and a sutured section horizontally stacked and placed in the cavity. The sutured sections of the support member one and the support member two are respectively formed by sewing with carbon fiber thread to form a reinforcement layer one and a reinforcement layer two.

[0008] As a further optimization of the present invention, the inner walls of the first and second concave-convex connecting layers are symmetrically provided with connectors, and the stitched sections of the first and second support members are located between the two connectors. The middle of the stitched sections of the two connectors and the first and second support members are formed by sewing with carbon fiber thread to form a reinforcing layer three with a circular cross-section.

[0009] As a further optimization of the present invention, the first concave-convex connecting layer, the second concave-convex connecting layer, the first support member, the second support member, and the first connector member are all made of polyamide material or polypropylene material.

[0010] As a further optimization of the present invention, the cross sections of the first reinforcement layer and the second reinforcement layer are parallel to each other or intersecting each other.

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

[0012] Step 1: A waterproof layer is formed on the surface of the top layer using a three-proof finishing agent. On the bottom layer and the surface of the top layer, a concave-convex connecting layer 1, a concave-convex connecting layer 2, a support component 1, a support component 2, and a connector 1 are integrally formed using a mold. Among them, support component 1 and support component 2 each include a fixed section connected to the inner wall of concave-convex connecting layer 1 or concave-convex connecting layer 2, and a movable sewing section.

[0013] Step 2: Place the bottom layer and the top layer with the concave-convex connection layer 1 and concave-convex connection layer 2 symmetrically to each other, so that the concave parts of the concave-convex connection layer 1 and the concave-convex connection layer 2 correspond to each other and the convex parts correspond to each other. Place the stitched sections of support member 1 and support member 2 horizontally stacked up and down. Use carbon fiber thread to sew and fix the stitched sections of support member 1 and support member 2 together to form reinforcement layer 1 and reinforcement layer 2 respectively. Then use carbon fiber thread to sew and fix the middle of the stitched sections of the two upper and lower connectors 1 and reinforcement layer 1 and reinforcement layer 2 together to form reinforcement layer 3 with a circular cross section.

[0014] Step 3: Hot-press the bottom layer, top layer, first concave-convex bonding layer, and second concave-convex bonding layer together along the convex parts of the first and second concave-convex bonding layers.

[0015] As a further optimization of the present invention, in step two, the sewn segment of the lower support member one is placed on top of the sewn segment of the upper support member two, and the sewn segments of support member one and support member two are placed horizontally stacked.

[0016] As a further optimization of the present invention, in step three, the pressure of the hot pressing treatment is 5-7 MPa, the temperature is 125-140℃, the number of hot pressing cycles is 2-5, and the hot pressing time for each cycle is 3-5 min.

[0017] The beneficial effects of this invention are as follows:

[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 by means of support component 1, support component 2, reinforcement layer 1, reinforcement layer 2, connector 1, and reinforcement layer 3, which makes the fabric have better tear resistance and the setting of the support component can also improve the fabric's down-proof performance.

[0019] 2) This invention supports the overall structural stability of the tear-resistant middle layer by forming mutual pressure between the upper and lower layers through support member one and support member two. The seam sections of support member one and support member two are sewn together by reinforcement layer one and reinforcement layer two, and support member one, support member two, and the two upper and lower connecting members one are sewn together by reinforcement layer three. This makes the support and pressure between the concave and convex connecting layer one and concave and convex connecting layer two more stable, which can improve the overall structural stability of the tear-resistant middle layer, thereby improving the tear resistance and down-proof performance of the fabric. It can also ensure that the fabric can maintain good tear resistance and down-proof performance after multiple washes. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the waterproof and tear-resistant carbon fiber fabric of Embodiment 1 of the present invention.

[0021] Figure 2 This is a cross-sectional schematic diagram of the tear-resistant middle layer of Embodiment 1 of the present invention.

[0022] Figure 3 This is a cross-sectional schematic diagram of the tear-resistant middle layer of Embodiment 2 of the present invention.

[0023] Figure 4 This is the invention Figure 3 A partial structural diagram.

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

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

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

[0027] In the diagram: 1. Bottom layer; 2. Tear-resistant middle layer; 21. Concave-convex bonding layer one; 22. Concave-convex bonding layer two; 23. Support component one; 24. Support component two; 25. Reinforcement layer one; 26. Reinforcement layer two; 27. Connector one; 28. Reinforcement layer three; 3. Top layer. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] I. Materials

[0030] 1. In this application, the bottom layer 1 is commercially available pure cotton fabric, and the top layer 3 is commercially available 180T spring spun fabric.

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

[0032] 3. In order to achieve the waterproof effect, the surface of the commercially available 180T spring spun fabric, which is the surface layer 3, is treated with a three-proof coating (waterproof, oil-proof and stain-proof coating) by BAYGARD C LEAN, which is purchased from Wujiang Jincheng Fine Chemical Co., Ltd.

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

[0034] II. Methods

[0035] To investigate the effects of different structural designs of the tear-resistant middle layer 2 on the tear resistance and down-proof properties of the waterproof and tear-resistant carbon fiber fabric, the following technical solutions were designed in Examples 1-2 and Comparative Examples 1-3, as detailed below:

[0036] Example 1

[0037] like Figure 1-2 As shown, a waterproof and tear-resistant carbon fiber fabric includes a bottom layer 1, a top layer 3, and a tear-resistant middle layer 2 disposed between the bottom layer 1 and the top layer 3.

[0038] The tear-resistant middle layer 2 includes a first concave-convex connecting layer 21 and a second concave-convex connecting layer 22 respectively disposed on opposite sides of the bottom layer 1 and the top layer 3. The concave portions of the first concave-convex connecting layer 21 and the second concave-convex connecting layer 22 correspond to each other to form a cavity, and the convex portions correspond to each other to form a hot-pressing section. The cavity is provided with a first support member 23 and a second support member 24 arranged diagonally.

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

[0040] Furthermore, the inner walls of the first and second concave-convex connecting layers 21 and 22 are symmetrically provided with connectors 27. The stitched sections of the first and second support members 23 and 24 are located between the two connectors 27. The middle of the stitched sections of the two connectors 27 and the first and second support members 23 and 24 are sewn with carbon fiber thread to form a reinforcing layer 28 with a circular cross-section.

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

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

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

[0044] Step 1: A waterproof layer is formed on the surface of the top layer 3 using a three-proof finishing agent. On the surfaces of the bottom layer 1 and the top layer 3, a first concave-convex connecting layer 21, a second concave-convex connecting layer 22, a first support 23, a second support 24, and a first connector 27 are integrally formed using a mold. Among them, the first support 23 and the second support 24 each include a fixed section connected to the inner wall of the first concave-convex connecting layer 21 or the second concave-convex connecting layer 22, as well as a movable sewing section.

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

[0046] Step 2: Place the bottom layer 1 and the top layer 3 with the concave-convex connecting layer 1 21 and the concave-convex connecting layer 22 symmetrically to each other, so that the concave parts of the concave-convex connecting layer 1 21 and the concave-convex connecting layer 22 correspond to each other and the convex parts correspond to each other. Place the stitched sections of support member 1 23 and support member 2 24 horizontally stacked up and down. Use carbon fiber thread to sew and fix the stitched sections of support member 1 23 and support member 2 24 together to form reinforcement layer 1 25 and reinforcement layer 2 26 respectively. Then use carbon fiber thread to sew and fix the middle of the stitched sections of the two upper and lower connectors 1 27 and reinforcement layer 1 25 and reinforcement layer 2 26 together to form reinforcement layer 3 28 with a circular cross section.

[0047] It should be noted that in step two of this embodiment, the sewn segment of the lower support member 23 is placed on top of the sewn segment of the upper support member 24, and the sewn segments of support member 23 and support member 24 are placed horizontally overlapping each other, i.e. Figure 1-4 As shown, support member 1 23 and support member 24 are connected and pressed against each other by the stitching section;

[0048] Step 3: Hot-press the bottom layer 1, top layer 3, concave-convex connection layer 1 21, and concave-convex connection layer 22 together along the convex parts of concave-convex connection layer 1 21 and concave-convex connection layer 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 cycles is 4, and the hot pressing time for each cycle is 4 minutes.

[0050] Example 2

[0051] like Figure 1 , 3 As shown in Figure 4, a waterproof and tear-resistant carbon fiber fabric differs from that in Example 1 in that the cross-sections of the first reinforcing layer 25 and the second reinforcing layer 26 are intersecting, while 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 differs from Example 2 in that the tear-resistant middle layer 2 in this comparative example does not have the structural design of connector 27 and reinforcing layer 28, while the rest is consistent with Example 2.

[0054] Comparative Example 2

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

[0056] Comparative Example 3

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

[0058] III. Performance Testing Experiment

[0059] The fabrics used in the following tear resistance and down-proof performance tests were 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 that were washed 35 times (35 washes in a drum washing machine at a speed of 1200 r / min, with each wash lasting 25 min).

[0060] Tear Resistance Test: Experimental Equipment: Q800 Dynamic Mechanical Analyzer (DMA, TA Instruments, Inc., USA); Experimental Method: Waterproof and tear-resistant carbon fiber fabrics from Examples 1-2 and Comparative Examples 1-2 were used as samples. The sample dimensions were strips of 230×210mm. The samples were placed in a tensile fixture, with one end fixed and the other end movable with the fixture. The temperature was 22℃±3℃, the frequency was set to 3Hz, and the applied stress was gradually increased from 0 at a rate of 4MPa / s. The strain change of the sample was recorded until the sample broke. The stress at the fracture point was taken as the tensile strength of the sample. The test data are shown in Table 1.

[0061] Table 1. Tear Resistance Test Data

[0062]

[0063]

[0064] Experimental conclusion: As can be seen from the data of Examples 1 and 2 in Table 1, the fabrics prepared in Examples 1 and 2 both have good tear resistance, with Example 2 showing better results;

[0065] Comparing the data from Example 2 with those from Comparative Examples 1-3 reveals that the structural design of support member 1 23 and support member 24 creates mutual pressure between the upper and lower layers. Specifically, support member 1 23 presses support member 24 downwards, and support member 24 presses support member 1 23 upwards, forming a balanced pressure to support the overall structural stability of the tear-resistant middle layer 2. By sewing the seam segments of support member 1 23 and support member 24 together with reinforcing layers 1 25 and 2 26, the structural stability between support member 1 23 and support member 24 can be further improved, thereby enhancing the overall structural stability of the tear-resistant middle layer 2. Finally, reinforcing layer 3 28 further... Support component 1 23, support component 24, and the two connecting components 1 27 are sewn together to form a more stable supporting and compressive effect between the concave-convex connecting layer 1 21 and the concave-convex connecting layer 22, which can better improve the overall structural stability of the tear-resistant middle layer 2. The structural design of connecting component 1 27 and reinforcing layer 3 28 can further improve the overall structural stability of the tear-resistant middle layer 2, thereby improving the tear resistance of the fabric. Moreover, the structural design of support component 1 23, support component 2 24, reinforcing layer 1 25, reinforcing layer 2 26, connecting component 1 27, and reinforcing layer 3 28 can improve tear resistance while ensuring that the fabric can still maintain a good tear resistance effect after multiple washes.

[0066] Down-proof performance test: The down-proof performance of the fabric was tested according to the national standard GB / T12705.2-2009 "Textiles - Test Method for Down-proof Performance of Fabrics - Part 2: Rotating Box Method". When the number of down threads is >15, the down-proof performance is poor; when 5 < down thread count ≤15, it has down-proof performance; when the number of down threads is ≤5, it has good down-proof performance. The test data are shown in Table 2.

[0067] Table 2. Test data on down-proof performance.

[0068]

[0069] Experimental Conclusion: Compared with Comparative Examples 1-3, the fabrics prepared in Examples 1 and 2 both exhibit better down-proof performance. Specifically, the parallel vertical arrangement of the seam segments of support member 1 23 and support member 24, which divides the cavity formed between the recesses of concave-convex connecting layer 1 21 and concave-convex connecting layer 2 22 into multiple spaces, enhances the down-proof performance. Reinforcing layers 1 25 and 2 6 tightly connect the seam segments between support member 1 23 and support member 2 24, ensuring the overall structure of the tear-resistant middle layer 2 remains relatively stable after multiple washes, thus improving the durability of the down-proof performance. Furthermore, reinforcing layer 3 28 connects and fixes the seam segments between the two connecting members 1 27 and support member 1 23 and support member 2 24, creating more cavities and maintaining good stability of the overall structure of the tear-resistant middle layer 2, thereby improving both the down-proof performance and its durability.

[0070] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A waterproof and tear-resistant carbon fiber fabric, characterized in that: It includes a base layer (1) and a top layer (3) and a tear-resistant intermediate layer (2) disposed between the base layer (1) and the top layer (3). The tear-resistant middle layer (2) includes a first concave-convex connecting layer (21) and a second concave-convex connecting layer (22) respectively disposed on opposite sides of the bottom layer (1) and the top layer (3). The concave portions of the first concave-convex connecting layer (21) and the second concave-convex connecting layer (22) correspond to each other to form a cavity, and the convex portions correspond to each other to form a hot-pressing section. The cavity is provided with a first support member (23) and a second support member (24) arranged diagonally. Both the first support member (23) and the second support member (24) include a fixed section connected to the inner wall of the first concave-convex connection layer (21) or the second concave-convex connection layer (22) and a sutured section horizontally stacked in the cavity. The sutured sections of the first support member (23) and the second support member (24) are respectively sewn with carbon fiber thread to form a first reinforcement layer (25) and a second reinforcement layer (26). The inner walls of the first (21) and the second (22) of the concave-convex connecting layer are symmetrically provided with connectors (27). The stitched sections of the first (23) and the second (24) of the support are located between the two connectors (27). The middle part of the stitched sections of the two connectors (27) and the first (23) and the second (24) of the support are formed by sewing with carbon fiber thread to form a reinforcing layer (28) with a circular cross section. The cross sections of the first reinforcement layer (25) and the second reinforcement layer (26) are parallel or intersecting.

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

3. A method for preparing a waterproof and tear-resistant carbon fiber fabric as described in any one of claims 1-2, characterized in that: The specific steps are as follows: Step 1: A waterproof layer is formed on the surface of the top layer (3) by applying a three-proof finishing agent. On the surfaces of the bottom layer (1) and the top layer (3), a first concave-convex connecting layer (21), a second concave-convex connecting layer (22), a first support member (23), a second support member (24), and a first connector (27) are integrally formed by molding. Among them, the first support member (23) and the second support member (24) both include a fixed section connected to the inner wall of the first concave-convex connecting layer (21) or the second concave-convex connecting layer (22) and a movable sewing section. Step 2: Place the bottom layer (1) and the top layer (3) with the concave-convex connecting layer 1 (21) and the concave-convex connecting layer 2 (22) symmetrically to each other, so that the concave parts of the concave-convex connecting layer 1 (21) and the concave-convex connecting layer 2 (22) correspond to each other and the convex parts correspond to each other. Place the stitched sections of support member 1 (23) and support member 2 (24) horizontally stacked up and down. Use carbon fiber thread to sew and fix the stitched sections of support member 1 (23) and support member 2 (24) together to form reinforcement layer 1 (25) and reinforcement layer 2 (26) respectively. Then use carbon fiber thread to sew and fix the middle part of the stitched sections of the two upper and lower connectors 1 (27) and reinforcement layer 1 (25) and reinforcement layer 2 (26) together to form reinforcement layer 3 (28) with a circular cross section. Step 3: The bottom layer (1), the top layer (3), the first concave-convex connection layer (21), and the second concave-convex connection layer (22) are fixed together by heat pressing along the convex positions of the first concave-convex connection layer (21) and the second concave-convex connection layer (22).

4. The waterproof and tear-resistant carbon fiber fabric and its preparation method according to claim 3, characterized in that: In step two, the suture segment of the lower support member one (23) is placed on top of the suture segment of the upper support member two (24), and the suture segments of support member one (23) and support member two (24) are placed horizontally overlapping each other.

5. The waterproof and tear-resistant carbon fiber fabric and its preparation method according to claim 4, characterized in that: In step three, the hot pressing pressure is 5-7 MPa, the temperature is 125-140℃, the number of hot pressing cycles is 2-5, and the hot pressing time for each cycle is 3-5 minutes.

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