A composite laminate for shoes having spaced apart carbon fiber layers and polyimide fiber layers and a method of making the same

Abstract

The present application provides a kind of composite material laminated board for shoe, including multiple carbon fiber layers and multiple polyimide fiber layers, adjacent fiber layers are bonded together by resin adhesive, multiple polyimide fiber layers are not adjacent to each other, and each polyimide fiber layer is separated from another polyimide fiber layer by multiple carbon fiber layers;The present application also provides a kind of sole component comprising the above laminated board;A kind of shoe product comprising the above sole component;And the method for preparing the laminated board, by controlling the sequence, uniformity, direction and the like of fiber laying in laminated board, the mechanical properties of composite material laminated board are improved, a kind of polyimide fiber / carbon fiber hybrid reinforced resin matrix composite laminated board with high strength, high toughness and light weight is prepared, and the comprehensive performance and service life of the laminated board for shoe are further improved.

Description

Technical Field

[0001] This invention relates to the field of composite material shoe sole technology, specifically to a composite material laminate for shoes and its preparation method. Background Technology

[0002] Fiber-reinforced resin composite laminates are a commonly used type of composite laminate for footwear, primarily composed of fiber and resin materials. Within the industry, the performance of composite laminates is often modified by controlling the type of fiber and its stacking structure, depending on the application requirements. Carbon fiber possesses high specific strength, tensile strength, low bending strength, and low elongation, which can impart high elastic modulus and high tensile strength to composite materials. However, carbon fiber composites also exhibit poor impact resistance, low toughness, brittleness, and susceptibility to fracture. Polyimide fibers possess high strength and good tensile properties, along with significant elongation and good toughness, compensating for the high rigidity and poor toughness of carbon fiber. However, because the strength and modulus of polyimide fibers are lower than those of carbon fiber, their performance varies under different stress states, making them prone to deformation and deterioration, thus affecting the reliability and service life of the composite material. Therefore, laminates made by simultaneously laying two types of fibers can combine the advantages and disadvantages of both fibers. Due to the significant differences in the properties of the two fibers, the fiber laying sequence, fiber direction, and uniformity of the two fibers will all have a significant impact on the performance of the laminate. Some carbon fiber / polyimide composite laminates have insufficient toughness, which will cause the laminate to easily break when subjected to impact during sports. Some carbon fiber / polyimide composite laminates have insufficient rigidity and cannot meet the propulsion performance requirements of footwear, especially sports shoes. Some carbon fiber / polyimide composite laminates are too heavy and cannot meet the lightweight requirements of shoe soles, especially sports shoe soles.

[0003] To at least overcome the above-mentioned problems, the present invention aims to provide a high-strength, high-toughness, and excellent and stable comprehensive performance carbon fiber / polyimide fiber reinforced resin composite laminate for footwear, and to provide a sole component and footwear product including the laminate, as well as a simplified and efficient method for preparing the laminate. Summary of the Invention

[0004] In a first aspect of the invention, a composite laminate for footwear is provided, comprising a plurality of carbon fiber layers and a plurality of polyimide fiber layers, adjacent fiber layers being bonded together by a resin adhesive. The plurality of polyimide fiber layers are non-adjacent, and each polyimide fiber layer is separated from another polyimide fiber layer by a plurality of carbon fiber layers. According to this design, the initial fracture displacement and stiffness of the composite material are increased, the material toughness is higher, and the flexural and tensile strengths of the material are increased, making it more resistant to deformation.

[0005] In some designs, the fiber layer on the compression side is a polyimide fiber layer. According to this design, the laminate has a better energy absorption effect than a carbon fiber layer on the compression side, and it can increase the displacement and failure strain at material failure, compensate for the high brittleness of carbon fibers, and improve the elongation and toughness of the composite material.

[0006] In some designs, multiple carbon fiber layers are laid on the side of each polyimide fiber layer away from the compression side. In some designs, the multiple polyimide fiber layers include a first polyimide fiber layer and a second polyimide fiber layer, with the first polyimide fiber layer located on the compression side. One or two pairs of adjacent carbon fiber layers are laid between the first and second polyimide fiber layers, and another pair of adjacent carbon fiber layers are laid on the side of the second polyimide fiber layer away from the first polyimide fiber layer. In some designs, the number of carbon fiber layers laid on the side of each polyimide fiber layer away from the compression side is the same. When the polyimide fiber layers are separated by multiple groups of carbon fiber layers, and the number of carbon fiber layers in these groups is similar, compared to unevenly aggregated polyimide fiber layups, the composite material exhibits greater initial fracture displacement and stiffness, higher toughness, and greater flexural and tensile strength with improved resistance to deformation.

[0007] In some embodiments, the plurality of carbon fiber layers comprises a plurality of paired adjacent carbon fiber layers, wherein the fibers of one carbon fiber layer are laid at an acute clockwise angle α degrees relative to the front-back direction, and the fibers of the other carbon fiber layer are laid at an acute counterclockwise angle α degrees relative to the front-back direction, and the fibers of the polyimide fiber layer are laid in the front-back direction. In this document, the front-back direction refers to the toe area of ​​the sole as the front and the heel area as the back (see...). Figure 1 For the description of angles, the front-back direction is taken as the 0-degree reference axis, with clockwise direction relative to the reference axis as positive angle and counterclockwise direction as negative angle (see...). Figure 3 According to this scheme, polyimide fibers are used to mix with carbon fibers to toughen the resin-based composite laminates. The symmetrical angle design between adjacent carbon fiber layers can effectively improve the toughness of the laminates.

[0008] In some designs, the value of 'a' is 15-45 degrees. At this fiber layup angle, the toughness of the laminate can be effectively improved while maintaining the appropriate stiffness of the composite material, so that the composite laminate for footwear can effectively enhance propulsion while improving impact resistance.

[0009] In a second aspect, a shoe sole component is provided, comprising the composite material laminate for footwear of any of the foregoing claims. According to this solution, the component can achieve lightweight, possesses high toughness and moderate rigidity, exhibits excellent overall performance, and is more suitable for use as a shoe sole component.

[0010] In a third aspect, a footwear product is provided, including the sole component of any of the foregoing embodiments. According to this solution, the footwear product can achieve lightweight design, and the sole, based on its stress characteristics, balances support and rapid response, resulting in better propulsion performance and a superior user experience.

[0011] In a fourth aspect, a preparation method is provided for preparing the aforementioned composite material laminate for footwear, comprising the following steps: Step 1: Layup, designing the position and angle of carbon fiber and polyimide fiber prepreg and laying them up to obtain a composite material; Step 2: Cutting, cutting the composite material obtained in Step 1 according to the shape of the mold; Step 3: Molding, placing the cut composite material into a molding mold, applying pressure according to molding conditions, and then heating, heat preservation, and cooling to complete the curing and molding process, thereby obtaining the composite material laminate. In some embodiments, the preparation method further includes Step 4: Post-treatment, grinding, cleaning, sandblasting, and painting the molded composite material laminate. Preferably, the curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30min.

[0012] According to this scheme, high-strength, high-modulus polyimide fibers are mixed with carbon fibers to toughen the interlayer of resin-based composite laminates, thereby solving the problems of brittleness, aging, and damage in carbon fiber reinforced resin-based composite laminates for sports shoes. By controlling the fiber layer layup sequence, setting the fibers on the compression side as polyimide fibers, and designing the angle of the carbon fiber layers relative to the front and rear directions, and controlling the uniformity of fiber mixing and laying, the laminate is made lightweight, giving it suitable toughness and rigidity, improving its overall performance, and preparing a high-strength, high-toughness, and lightweight polyimide / carbon fiber hybrid reinforced resin-based composite laminate, thereby improving the overall service life of the shoe laminate. Attached Figure Description

[0013] Figure 1 A plan view of the shoe sole is shown.

[0014] Figure 2 A schematic diagram of the laminate fiber layup in Example 1 is shown.

[0015] Figure 3 A schematic diagram of the fiber arrangement angle in Example 2 is shown. Detailed Implementation

[0016] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Unless otherwise stated, the terms used herein have their ordinary meanings in the art.

[0017] This invention utilizes high-strength, high-modulus polyimide fibers mixed with carbon fibers to toughen the interlaminar layer of resin-based composite laminates, thereby addressing the problems of brittleness, aging, and damage in carbon fiber reinforced resin-based composite laminates for footwear. According to this invention, by controlling the fiber layer layup sequence, the fibers on the compression side are set as polyimide fibers, and the angle of the carbon fiber layers relative to the front-to-back direction is designed, and the uniformity of the fiber mixing and laying is controlled, the laminate is made lightweight, giving it suitable toughness and rigidity, improving its overall performance, and preparing a high-strength, high-toughness, and lightweight polyimide / carbon fiber hybrid reinforced resin-based composite laminate, thus improving the overall service life of the footwear laminate.

[0018] Several embodiments and comparative examples of the present invention are described below to illustrate the specific means and technical effects of the present invention. The terms used in the following description are to be understood according to their ordinary meaning in the art, unless otherwise stated; for example, "compression side" refers to the side of the laminate facing the ground when it is assembled into a shoe product; "tension side" refers to the side of the laminate facing the foot when it is assembled into a shoe product.

[0019] The Influence of Order

[0020] Example 1

[0021] This invention provides a composite material laminate for footwear, comprising six fiber layers sequentially from the compression side to the tensile side (as shown in Table 1). The fiber layer on the compression side is the first layer, and the fiber layer on the tensile side is the sixth layer. The different fiber layers are bonded together with a resin adhesive. The first layer is a polyimide fiber layer, the second layer is a carbon fiber layer, the third layer is a carbon fiber layer, the fourth layer is a polyimide fiber layer, the fifth layer is a carbon fiber layer, and the sixth layer is a carbon fiber layer (see table for fiber layer layup order). Figure 2 With the toe area of ​​the laminate body as the front and the heel area of ​​the laminate body as the back, and the front-back direction as the reference axis, the clockwise direction relative to the reference axis is the positive angle and the counterclockwise direction is the negative angle. The first layer of fibers is arranged at 0° with the reference axis, the second layer of fibers is at 15° with the reference axis, the third layer of fibers is at -15° with the reference axis, the fourth layer of fibers is at 0° with the reference axis, the fifth layer of fibers is at 15° with the reference axis, and the sixth layer of fibers is at -15° with the reference axis.

[0022]

[0023]

[0024] Table 1: Layup method of Example 1

[0025] This embodiment also provides a preparation method for preparing the above-mentioned shoe composite laminate. The preparation method includes the following steps: Step 1: Laying up, laying up carbon fiber and polyimide fiber prepreg according to the position sequence and angle design described in the above embodiment to obtain a composite material; Step 2: Cutting, cutting the composite material obtained in Step 1 according to the mold shape; Step 3: Molding, placing the cut composite material into a molding mold, applying pressure according to the molding conditions and heating, heat preservation and cooling to complete the curing molding, obtaining a composite laminate. The curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30min; Step 4: Post-treatment, grinding, cleaning, sandblasting and painting the molded composite laminate to obtain the shoe composite laminate.

[0026] The shoe composite laminate of Example 1 was subjected to performance tests and data comparison with Comparative Examples 1-2 of the same size. The only difference between Comparative Example 1 (as shown in Table 2) and Example 1 is the uniformity of fiber layer distribution. Otherwise, the compression side of both examples is a polyimide fiber layer, and the fiber angle design and manufacturing steps are identical. The only difference between Comparative Example 2 (as shown in Table 3) and Example 1 is that the laying order of the six fiber layers in Comparative Example 2 is exactly the reverse of that in Example 1. The compression side of Example 1 is a polyimide fiber layer, while the compression side of Comparative Example 2 is a carbon fiber layer. Otherwise, the fiber angle design and manufacturing steps are identical. The performance tests in Examples 1 and Comparative Examples 1-2 were for the initial fracture displacement and stiffness of the materials, respectively. The performance testing methods used were all national standards. The initial fracture displacement refers to the displacement of the fiber-reinforced resin matrix composite material when the material sample first shows a macroscopically visible crack or fracture in the three-point bending test. This displacement corresponds to the moment when the material begins to lose its integrity or produces obvious cracks, and can reflect the toughness of the material. Generally, the higher the value, the better the toughness of the material. The point on the force-displacement curve where nonlinearity or obvious decline begins is usually taken as the representative value. The test method can refer to "GB / T1449-2005 Test Method for Bending Properties of Fiber Reinforced Plastics". Stiffness refers to the ability of a material or component to resist deformation under load. In this technical solution, stiffness specifically refers to the ability of the flexural part of the sole material to resist elastic deformation under force. Components with high stiffness are not easy to deform under force, while components with low stiffness are easy to deform. The stiffness test method can refer to "GB / T 32023-2023 Test Method for Whole Footwear: Stiffness of Flexural Part".

[0027] number of floors Angle (°) Material 1 0 polyimide fiber 2 15 polyimide fiber 3 -15 carbon fiber 4 0 carbon fiber 5 15 carbon fiber 6 -15 carbon fiber

[0028] Table 2: Ply information for Comparative Example 1

[0029] number of floors Angle (°) Material 1 15 carbon fiber 2 -15 carbon fiber 3 0 polyimide fiber 4 15 carbon fiber 5 -15 carbon fiber 6 0 polyimide fiber

[0030] Table 3: Layup method of Comparative Example 2

[0031] Performance tests were conducted on Example 1, Comparative Example 1, and Comparative Example 2, and the results are shown in the table below:

[0032]

[0033] Based on the performance test data of Example 1 and Comparative Example 1, it can be seen that in the example, the present invention lays polyimide fiber layer and carbon fiber layer evenly alternately. Compared with the non-uniform laying of the two fiber layers, the uniform distribution of the two fibers can increase the initial fracture displacement value of the composite material and the stiffness value. This indicates that the bending and tensile strength of the laminate increases, the toughness is improved, the ability to resist deformation and damage is enhanced, and the overall performance of the material is improved.

[0034] Based on the performance test data comparison between Example 1 and Comparative Example 2, the initial fracture displacement and stiffness of the example are higher than those of the comparative example. In this invention, the fiber layer on the compression side is fixed as a polyimide fiber layer, which increases the initial fracture displacement value of the laminate compared to the laminate with a carbon fiber layer on the compression side, and also increases the stiffness. This indicates that the material toughness is improved, and the energy absorption effect of the shoe sole is better than that of the laminate with a carbon fiber layer on the compression side. It can increase the displacement and failure strain when the material fails, make up for the disadvantage of the high brittleness of carbon fiber, and improve the elongation, toughness and impact resistance of the composite material.

[0035] The Influence of Angle

[0036] Example 2

[0037] This embodiment provides a composite material laminate for shoes, comprising eight fiber layers arranged sequentially from the compression side to the tension side (as shown in Table 4). The fiber layer on the compression side is the first layer, and the fiber layer on the tension side is the eighth layer. The different fiber layers are bonded together with a resin adhesive. The first layer is a polyimide fiber layer, the second layer is a carbon fiber layer, the third layer is a carbon fiber layer, the fourth layer is a carbon fiber layer, the fifth layer is a carbon fiber layer, the sixth layer is a polyimide fiber layer, the seventh layer is a carbon fiber layer, and the eighth layer is a carbon fiber layer. The laminate body is designed for footwear. With the toe area as the front and the heel area of ​​the laminate body as the rear, and using the front-to-back direction as the reference axis, a clockwise direction relative to the reference axis is considered a positive angle, and a counterclockwise direction is considered a negative angle. The first layer of fibers is arranged at 0° to the reference axis, the second layer at 15°, the third layer at -15°, the fourth layer at 15°, the fifth layer at -15°, the sixth layer at 0°, the seventh layer at 15°, and the eighth layer at -15° (see [reference] for the two fiber arrangement angles). Figure 3 ).

[0038]

[0039]

[0040] Table 4: Layup method of Example 2

[0041] This embodiment also provides a preparation method for preparing the above-mentioned shoe composite laminate. The preparation method includes the following steps: Step 1: Laying up, laying up carbon fiber and polyimide fiber prepreg according to the position sequence and angle design described in the above embodiment to obtain a composite material; Step 2: Cutting, cutting the composite material obtained in Step 1 according to the mold shape; Step 3: Molding, placing the cut composite material into a molding mold, applying pressure according to the molding conditions and heating, heat preservation and cooling to complete the curing molding, obtaining a composite laminate. The curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30min; Step 4: Post-treatment, grinding, cleaning, sandblasting and painting the molded composite laminate to obtain the shoe composite laminate.

[0042] It should be noted that the "prepreg" mentioned here and in the embodiments below refers to an intermediate material formed by pre-immersing the carbon fiber or polyimide fiber to be laid in a thermosetting resin adhesive. The fiber grades used in the "carbon fiber prepreg" are T300, T400, T700, T800, T1000 or T1100, etc., and the fiber grades used in the "polyimide fiber prepreg" are S20, S25, S30, S35, S40. This invention can use various feasible thermosetting resin adhesive materials, including epoxy resin, polyurethane, acrylate, etc. This invention does not limit the specific type of thermosetting resin adhesive used.

[0043] Example 3

[0044] This invention provides a composite material laminate for footwear, comprising eight fiber layers sequentially from the compression side to the tension side (as shown in Table 5). The fiber layer on the compression side is the first layer, and the fiber layer on the tension side is the eighth layer. The different fiber layers are bonded together with a resin adhesive. The first layer is a polyimide fiber layer, the second layer is a carbon fiber layer, the third layer is a carbon fiber layer, the fourth layer is a carbon fiber layer, the fifth layer is a carbon fiber layer, the sixth layer is a polyimide fiber layer, the seventh layer is a carbon fiber layer, and the eighth layer is a carbon fiber layer. With the toe area of ​​the body as the front and the heel area of ​​the laminate body as the rear, and the front-to-back direction as the reference axis, the clockwise direction relative to the reference axis is a positive angle, and the counterclockwise direction is a negative angle. The first layer of fibers is arranged at 0° with respect to the reference axis, the second layer of fibers is at 25° with respect to the reference axis, the third layer of fibers is at -25° with respect to the reference axis, the fourth layer of fibers is at 25° with respect to the reference axis, the fifth layer of fibers is at -25° with respect to the reference axis, the sixth layer of fibers is at 0° with respect to the reference axis, the seventh layer of fibers is at 25° with respect to the reference axis, and the eighth layer of fibers is at -25° with respect to the reference axis.

[0045] number of floors Angle (°) Material 1 0 polyimide fiber 2 25 carbon fiber 3 -25 carbon fiber 4 25 carbon fiber 5 -25 carbon fiber 6 0 polyimide fiber 7 25 carbon fiber 8 -25 carbon fiber

[0046] Table 5: Lamination method of Example 3

[0047] This embodiment also provides a preparation method for preparing the above-mentioned shoe composite laminate. The preparation method includes the following steps: Step 1: Laying up, laying up carbon fiber and polyimide fiber prepreg according to the position sequence and angle design described in the above embodiment to obtain a composite material; Step 2: Cutting, cutting the composite material obtained in Step 1 according to the mold shape; Step 3: Molding, placing the cut composite material into a molding mold, applying pressure according to the molding conditions and heating, heat preservation and cooling to complete the curing molding, obtaining a composite laminate. The curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30min; Step 4: Post-treatment, grinding, cleaning, sandblasting and painting the molded composite laminate to obtain the shoe composite laminate.

[0048] Example 4

[0049] This invention provides a composite material laminate for footwear, comprising eight fiber layers sequentially from the compression side to the tension side (as shown in Table 6). The fiber layer on the compression side is the first layer, and the fiber layer on the tension side is the eighth layer. The different fiber layers are bonded together with a resin adhesive. The first layer is a polyimide fiber layer, the second layer is a carbon fiber layer, the third layer is a carbon fiber layer, the fourth layer is a carbon fiber layer, the fifth layer is a carbon fiber layer, the sixth layer is a polyimide fiber layer, the seventh layer is a carbon fiber layer, and the eighth layer is a carbon fiber layer. With the toe area of ​​the body as the front and the heel area of ​​the laminate body as the rear, the front-to-back direction is used as the reference axis. The clockwise direction relative to the reference axis is a positive angle, and the counterclockwise direction is a negative angle. The first layer of fibers is arranged at 0° with respect to the reference axis, the second layer of fibers is at 45° with respect to the reference axis, the third layer of fibers is at -45° with respect to the reference axis, the fourth layer of fibers is at 45° with respect to the reference axis, the fifth layer of fibers is at -45° with respect to the reference axis, the sixth layer of fibers is at 0° with respect to the reference axis, the seventh layer of fibers is at 45° with respect to the reference axis, and the eighth layer of fibers is at -45° with respect to the reference axis.

[0050] number of floors Angle (°) Material 1 0 polyimide fiber 2 45 carbon fiber 3 -45 carbon fiber 4 45 carbon fiber 5 -45 carbon fiber 6 0 polyimide fiber 7 45 carbon fiber 8 -45 carbon fiber

[0051] Table 6: Layup method of Example 4

[0052] This embodiment also provides a preparation method for preparing the above-mentioned shoe composite laminate. The preparation method includes the following steps: Step 1: Laying up, laying up carbon fiber and polyimide fiber prepreg according to the position sequence and angle design described in the above embodiment to obtain a composite material; Step 2: Cutting, cutting the composite material obtained in Step 1 according to the mold shape; Step 3: Molding, placing the cut composite material into a molding mold, applying pressure according to the molding conditions and heating, heat preservation and cooling to complete the curing molding, obtaining a composite laminate. The curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30min; Step 4: Post-treatment, grinding, cleaning, sandblasting and painting the molded composite laminate to obtain the shoe composite laminate.

[0053] The shoe composite laminates of Examples 2, 3, and 4, as well as Comparative Example 3 of the same size, were subjected to performance tests and the data were compared. In Comparative Example 3 (as shown in Table 7), the fibers of all layers were not designed with symmetrical angles, and the fibers of all fiber layers were parallel to the front-to-back direction. The other manufacturing steps were exactly the same as those of Examples 2-4. The performance tested in Examples 2-4 and the Comparative Example were initial fracture displacement and stiffness, respectively. All performance testing methods used were national standards. Initial fracture displacement refers to the displacement of the fiber-reinforced resin matrix composite material when a macroscopically visible crack or fracture first appears in the material sample during a three-point bending test. This displacement corresponds to the moment when the material begins to lose its integrity or develops obvious cracks, and it reflects the toughness of the material. Generally, the higher the value, the better the toughness of the material. The point on the force-displacement curve where nonlinearity or a significant decrease begins is usually taken as the representative value. The test method can refer to "GB / T 1449-2005 Test Method for Bending Properties of Fiber Reinforced Plastics". Stiffness refers to the ability of a material or component to resist deformation under load. In this technical solution, stiffness specifically refers to the ability of the flexural part of the sole material to resist elastic deformation under force. Components with high stiffness are less likely to deform under force, while components with low stiffness are more likely to deform. The test method for stiffness can refer to "GB / T32023-2023 Test Method for Whole Footwear: Stiffness of Flexural Parts".

[0054] number of floors Angle (°) Material 1 0 polyimide fiber 2 0 carbon fiber 3 0 carbon fiber 4 0 carbon fiber 5 0 carbon fiber 6 0 polyimide fiber 7 0 carbon fiber 8 0 carbon fiber

[0055] Table 7: Layup Method of Comparative Example 3. Performance tests were conducted on Examples 2-4 and Comparative Example 3, and the results are shown in the table below:

[0056]

[0057] Based on the performance test data comparison between Examples 2-4 and Comparative Example 3, it can be seen that the present invention employs a symmetrical angle design between different fiber layers. In Example 2, the symmetrical angle is set to 15 degrees / -15 degrees. Compared with Comparative Example 1 without angle design, the mass of the composite laminate is reduced, making the shoe lighter. The initial fracture displacement is increased, the toughness of the composite material is enhanced, and the stiffness of the composite material is also enhanced. This effectively enhances the propulsion performance while improving the impact resistance of the shoe. In Example 3, when the symmetrical angle is set to 25 degrees / -25 degrees, the mass of the composite laminate for the shoe is reduced compared with Comparative Example 3 without angle design, making the shoe lighter. The initial fracture displacement is increased, and the toughness of the composite material is stronger. At the same time, the stiffness of the composite material is not significantly reduced. This improves the impact resistance of the shoe while maintaining strong propulsion performance, making the shoe less prone to deformation. In Example 4, when the symmetrical angle is set to 45 degrees / -45 degrees, compared with Comparative Example 3 without angle design, the initial fracture displacement of the composite laminate for the shoe is increased, the toughness of the composite material is enhanced, and the stiffness of the composite material is not significantly reduced. This improves the impact resistance of the shoe while maintaining strong propulsion performance, making the shoe less prone to deformation.

[0058] In a further embodiment, a sole component is provided, such as... Figure 1 As shown, it includes the composite material laminate for footwear in any of the foregoing embodiments. This sole component is lightweight, has high toughness and moderate rigidity, and has excellent overall performance, making it more suitable for use as a sole component.

[0059] In a further embodiment, a shoe product is provided, including... Figure 1 The shoe sole components shown enable the shoe product to achieve lightweight design. The sole, based on the stress characteristics, balances support and rapid response, resulting in better propulsion performance and a superior user experience.

[0060] This document describes in detail exemplary embodiments of the present invention with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A composite laminate sheet for shoes comprising a plurality of carbon fiber layers and a plurality of polyimide fiber layers, the adjacent fiber layers being bonded together by a resin adhesive, characterized in that, The plurality of polyimide fiber layers are not adjacent to each other. Each polyimide fiber layer is separated from another polyimide fiber layer by a plurality of carbon fiber layers. The plurality of carbon fiber layers include a plurality of paired adjacent carbon fiber layers. In each paired carbon fiber layer, the fibers of one carbon fiber layer are laid at an acute clockwise angle α degrees relative to the front-back direction, and the fibers of the other carbon fiber layer are laid at an acute counterclockwise angle α degrees relative to the front-back direction. The value of α is 15-25 degrees.

2. The shoe composite laminate of claim 1, wherein, The compression side is a polyimide fiber layer.

3. The shoe composite laminate of claim 1 or 2, wherein The polyimide fiber layer is laid out along the front-to-back direction.

4. The shoe composite laminate of claim 1, wherein, Multiple carbon fiber layers are laid on the side of each polyimide fiber layer away from the compression side.

5. The shoe composite laminate of claim 4, wherein, The plurality of polyimide fiber layers include a first polyimide fiber layer and a second polyimide fiber layer. The first polyimide fiber layer is located on the compression side. One or two pairs of adjacent carbon fiber layers are laid between the first polyimide fiber layer and the second polyimide fiber layer. On the side of the second polyimide fiber layer away from the first polyimide fiber layer, a pair of adjacent carbon fiber layers are laid.

6. The shoe composite laminate of claim 1, wherein, The number of carbon fiber layers is the same on the side of each polyimide fiber layer away from the compression side.

7. A shoe sole component comprising a composite material laminate for footwear as described in any one of claims 1-6.

8. A shoe product comprising the sole component as described in claim 7.

9. A method of manufacture for the manufacture of a shoe composite laminate according to any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Lamination, lay up carbon fiber and polyimide fiber prepreg to obtain composite material; Step 2: Cutting. Cut the composite material obtained in Step 1 according to the shape of the mold. Step 3: Molding. The cut composite material is placed into the molding mold. Pressure is applied according to the molding conditions, and the material is heated, kept warm, and cooled to complete the curing and molding process, resulting in a composite laminate.

10. The preparation method according to claim 9, characterized in that, Also includes Step 4: Post-processing, the formed composite laminate is sanded, cleaned, sandblasted and painted.

11. The preparation method according to claim 9, characterized in that, The curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30 min.

Images