Shoe composite material laminate having compressed side polyimide fiber layer and preparation method therefor

Abstract

Provided in the present invention are a shoe composite material laminate having a compressed side polyimide fiber layer and a preparation method therefor. The laminate comprises a plurality of carbon fiber layers and a plurality of polyimide fiber layers, adjacent fiber layers being combined together by means of a resin adhesive, and the fiber layer arranged on a compressed side of the laminate being a polyimide fiber layer. Also provided in the present invention are a sole component comprising the laminate, a shoe product comprising the sole component, and a method for preparing the laminate. By means of controlling the laying sequence, uniformity, and direction of fibers in the laminate, the mechanical properties of the composite material laminate are improved. Thus, a high-strength high-toughness lightweight polyimide fiber / carbon fiber hybrid reinforced resin-based composite material laminate is prepared, thereby improving the overall performance and service life of the shoe laminate.

Description

Composite material laminate sheet for shoes with compression side polyimide fiber layer and method for manufacturing the same TECHNICAL FIELD

[0001] The present application relates to the technical field of composite shoe soles, in particular to a composite material laminate sheet for shoes and a method for manufacturing the same. BACKGROUND

[0002] The fiber-reinforced resin composite laminate sheet is a commonly used composite material laminate sheet for shoes, which is mainly composed of fiber materials and resin materials. In the industry, according to the use requirements, the performance of the composite material laminate sheet is often changed by controlling the types and stacking structures of the fiber materials. Carbon fiber has the characteristics of high specific strength, tensile resistance, low bending, and low elongation, which can endow the composite material with the characteristics of high elastic modulus and high tensile strength. However, carbon fiber composite material also has the characteristics of poor impact resistance, poor toughness, high brittleness, and easy breakage. Polyimide fiber has high strength, good tensile resistance, large elongation, and good toughness, which can make up for the shortcomings of carbon fiber in rigidity and toughness. However, the strength and modulus of polyimide fiber are lower than those of carbon fiber, and the performance is inconsistent under different stress states, which can easily cause deformation and deterioration, affecting the reliability and service life of the composite material. Therefore, the laminate sheet prepared by laying two kinds of fibers at the same time can have the advantages of both fibers, but also the disadvantages of both fibers. Due to the large difference between the characteristics of the two fibers, the laying sequence, fiber direction, and uniformity of the two fibers will have a great impact on the performance of the laminate sheet. Some carbon fiber / polyimide composite laminate sheets have insufficient toughness, which can easily cause brittle fracture of the laminate sheet when subjected to impact during movement. Some carbon fiber / polyimide composite laminate sheets have insufficient rigidity, which cannot meet the demand of propulsion performance of shoes, especially sports shoes. Some carbon fiber / polyimide composite laminate sheets have a heavy weight, which cannot meet the demand of lightweight of shoe soles, especially sports shoe soles. TECHNICAL PROBLEM

[0003] The present application aims to provide a carbon fiber / polyimide fiber-reinforced resin composite laminate sheet for shoes with high strength, high toughness, and excellent and stable comprehensive performance, and to provide a shoe sole member and a shoe product comprising the laminate sheet, and a method for manufacturing the laminate sheet with high efficiency. TECHNICAL SOLUTION

[0004] In the first aspect of the present application, a shoe composite material laminate is provided, comprising a plurality of carbon fiber layers and a plurality of polyimide fiber layers, adjacent fiber layers being combined together by a resin adhesive, characterized in that the fiber layer on the compression side is a polyimide fiber layer. According to this scheme, the energy absorption effect of the laminate is better than that of the compression side being a carbon fiber layer, and the displacement and failure strain when the material fails can be increased, the disadvantage of the brittleness of carbon fiber is compensated, and the elongation and toughness of the composite material are improved.

[0005] In some schemes, the plurality of polyimide fiber layers are not adjacent to each other, and each polyimide fiber layer is separated from another polyimide fiber layer by a plurality of carbon fiber layers. In some schemes, a plurality of carbon fiber layers are laid on the side of each polyimide fiber layer away from the compression side. In some schemes, 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 blocked by a plurality of groups of carbon fiber layers, and the number of carbon fiber layers in these groups of carbon fiber layers is close, compared with the unevenly gathered lay-up of polyimide fiber layers, the initial fracture displacement and stiffness of the composite material are increased, the material toughness is higher, the bending and tensile strength of the material is increased and more resistant to deformation.

[0006] In some schemes, the plurality of carbon fiber layers comprises a plurality of pairs of adjacent carbon fiber layers, the fibers of one layer of each pair of carbon fiber layers are laid at a clockwise acute angle α degrees with respect to the front-back direction, the fibers of the other layer of carbon fiber layers are laid at a counterclockwise acute angle α degrees with respect to the front-back direction, and the fibers of the polyimide fiber layer are laid along the front-back direction. The front-back direction herein is with the toe area of the sole as the front and the heel area as the back (see Figure 1), and for the description of the angle, the front-back direction is taken as the 0-degree reference axis, and the clockwise direction with respect to the reference axis is taken as the positive angle and the counterclockwise direction is taken as the negative angle (see Figure 3). According to this scheme, the polyimide fiber is used to hybridize the carbon fiber to interlamination toughen the resin-based composite material laminate, and the symmetric angle design between adjacent carbon fiber layers can effectively improve the toughness of the laminate.

[0007] In some schemes, the value of a is 15-45 degrees, and at this fiber laying angle, the toughness of the laminate can be effectively improved, and the appropriate stiffness of the composite material can be maintained, so that the shoe composite material laminate can effectively enhance the propulsion while improving the impact resistance.

[0008] In some embodiments, the plurality of polyimide fiber layers comprises 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 paired adjacent carbon fiber layers are arranged between the first polyimide fiber layer and the second polyimide fiber layer, and one pair of paired adjacent carbon fiber layers is arranged on the side of the second polyimide fiber layer away from the first polyimide fiber layer. According to this embodiment, the laminated plate can be lightweight, has good energy absorption effect, can increase material toughness, maintain appropriate rigidity, compensate for the disadvantage of high brittleness of carbon fiber, and improve the elongation and toughness of the composite material.

[0009] In a second aspect, a shoe sole member is provided, comprising any one of the shoe composite laminated plates described above. According to this embodiment, the member can be lightweight, has high toughness and moderate rigidity, and has excellent comprehensive performance, and is more suitable for use as a shoe sole member.

[0010] In a third aspect, a shoe product is provided, comprising any one of the shoe sole members described above. According to this embodiment, the shoe product can be lightweight, the sole can balance support and rapid response according to the stress characteristics, has better propulsion performance, and has higher user experience.

[0011] In a fourth aspect, a preparation method is provided for preparing the shoe composite laminated plate described above, comprising the following steps: step one, layering, the position and angle of carbon fiber and polyimide fiber prepreg are designed and layered to obtain a composite material; step two, cutting, the composite material obtained in step one is cut according to the shape of the mold; step three, molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling are applied according to the molding conditions, curing molding is completed to obtain a composite laminated plate. In some embodiments, the preparation method further comprises step four, post-processing, the molded composite laminated plate is polished, washed, sandblasted and painted. Preferably, the curing temperature is 110-220°C, the pressure is 1-3MPa, and the molding time is 5-30min. Advantages

[0012] According to this embodiment, high-strength and high-modulus polyimide fibers are used to hybridize carbon fibers to interlamination toughen the resin-based composite laminated plate, to solve the problems of brittle fracture, aging and damage of carbon fiber reinforced resin-based composite laminated plates for sports shoes. By controlling the layering sequence of the fiber layers, the fibers on the compression side are set to polyimide fibers, and the fibers of the carbon fiber layers are designed in angle relative to the front and rear directions, and the uniformity of the fiber hybridization is controlled to realize the lightweight of the laminated plate, so that the laminated plate has appropriate toughness and rigidity, improves the comprehensive performance of the laminated plate, and prepares a polyimide fiber / carbon fiber hybrid reinforced resin-based composite laminated plate with high strength, high toughness and light weight, thereby improving the service life of the shoe laminated plate as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 shows a plan view of a shoe sole.

[0014] Figure 2 shows a schematic view of the fiber layup of the laminate in Example 1.

[0015] Figure 3 shows a schematic view of the fiber orientation angle in Example 2. Embodiments of the invention

[0016] In order to make the purpose, scheme and advantages of the technical solutions of the present application more clear, the technical solutions of the present application will be described clearly and completely in the following with reference to specific embodiments of the present application. Unless otherwise specified, the terms used herein have the meanings commonly understood in the art.

[0017] The present application uses high-strength and high-modulus polyimide fibers to hybridize carbon fibers to interlamination toughen resin-based composite laminates, to solve the problems of brittle fracture, aging and damage of carbon fiber reinforced resin-based composite laminates for shoes. According to the manner of the present application, by controlling the fiber layer layup sequence, setting the fibers on the compression side as polyimide fibers, and designing the angle of the fibers of the carbon fiber layer with respect to the front and back directions, controlling the uniformity of fiber hybridization, the lightweight of the laminate is realized, the laminate has appropriate toughness and rigidity, the comprehensive performance of the laminate is improved, a polyimide fiber / carbon fiber hybrid reinforced resin-based composite laminate with high strength, high toughness and light weight is prepared, and the service life of the overall laminate for shoes is improved.

[0018] Several embodiments and several comparative examples of the present application are described below to illustrate the specific means and technical effects of the present application. The terms used in the following description are understood according to the meanings commonly understood in the art, unless otherwise specified, for example, "compression side" refers to the side facing the ground when the laminate is assembled into a shoe product; "tension side" refers to the side facing the upper when the laminate is assembled into a shoe product.

[0019]

Effect of sequence

[0020] Example 1

[0021] The present application provides a kind of composite material laminated sheet for shoe, from compression side to tensile side in turn is divided into 6 layers of fiber layer (as shown in table 1), wherein the fiber layer arranged in compression side is first layer, the fiber layer arranged in tensile side is sixth layer, different fiber layers are bonded together by resin adhesive, wherein the first layer is polyimide fiber layer, the second layer is carbon fiber layer, the third layer is carbon fiber layer, the fourth layer is polyimide fiber layer, the fifth layer is carbon fiber layer, and the sixth layer is carbon fiber layer (fiber layer laying order is seen in figure 2), with the toe area of the laminated sheet body as front, with the heel area of the laminated sheet body as back, with front-back direction as reference axis, relative to the clockwise direction of reference axis is positive angle, and the counterclockwise direction is negative angle, the fiber of first layer is arranged to be 0 ° with reference axis, the fiber of second layer is 15 ° with reference axis, the fiber of third layer is-15 ° with reference axis, the fiber of fourth layer is 0 ° with reference axis, the fiber of fifth layer is 15 ° with reference axis, and the fiber of sixth layer is-15 ° with reference axis.

[0022] Layer number Angle (°) Material 10 Polyimide fiber 215 Carbon fiber 3-15 Carbon fiber 40 Polyimide fiber 515 Carbon fiber 6-15 Carbon fiber

[0023] Table 1: laying mode of example 1

[0024] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminated sheet for shoe, which comprises the following steps: step one: layering, carbon fiber and polyimide fiber prepreg are laid according to the position order and angle design described in the above embodiment to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling according to the molding conditions, curing molding is completed to obtain a composite material laminated sheet, the curing temperature is 110-220 DEG C, the pressure is 1-3 MPa, and the molding time is 5-30 min; step four: post-processing, the molded composite material laminated sheet is polished, washed, sandblasted and painted to obtain a composite material laminated sheet for shoe.

[0025] The shoe composite laminates of the above-mentioned Example 1 and the same size of Comparative Example 1-2 were respectively subjected to performance testing and data comparison. The only difference between Comparative Example 1 (as shown in Table 2) and Example 1 was that the laying sequence of the six fiber layers in Comparative Example 1 was exactly opposite to that in Example 1. The compression side of Example 1 was the polyimide fiber layer, while the compression side of Comparative Example 1 was the carbon fiber layer. Except for this, the fiber angle design and manufacturing steps were exactly the same. The only difference between Comparative Example 2 (as shown in Table 3) and Example 1 was the uniformity of the distribution of the fiber layers. Except for this, the compression side was the polyimide fiber layer, and the fiber angle design and manufacturing steps were exactly the same. The performance tested in Example 1, Comparative Example 1 and Comparative Example 2 was respectively the initial fracture displacement and stiffness of the material. The performance testing method used was the national standard. The initial fracture displacement refers to the displacement of the fiber reinforced resin composite material when the first macroscopic crack or fracture occurs in the three-point bending test. This displacement corresponds to the time when the material begins to lose integrity or produce obvious cracks, which can reflect the toughness of the material. Generally, the higher the value, the better the toughness of the material. The representative value is the point where the nonlinearity or obvious decline appears on the force-displacement curve. The test method can refer to “GB / T 1449-2005 Fiber Reinforced Plastics Bending Performance Test Method”. The stiffness refers to the ability of a material or component to resist deformation under load. In this technical solution, the stiffness specifically refers to the ability of the flexure part of the sole material to resist elastic deformation under stress. Components with high stiffness are less likely to deform under stress, while components with low stiffness are more likely to deform. The test method for stiffness can refer to “GB / T 32023-2023 Shoe Test Method for Flexure Stiffness”.

[0026] Layer Angle (°) Material 115 Carbon Fiber 2-15 Carbon Fiber 30 Polyimide Fiber 415 Carbon Fiber 5-15 Carbon Fiber 60 Polyimide Fiber

[0027] Table 2: Laying method of Comparative Example 1

[0028] Layer Angle (°) Material 10 Polyimide Fiber 215 Polyimide Fiber 3-15 Carbon Fiber 40 Carbon Fiber 515 Carbon Fiber 6-15 Carbon Fiber

[0029] Table 3: Laying information of Comparative Example 2

[0030] Example 1, Comparative Example 1 and Comparative Example 2 were respectively subjected to performance testing, and the results are shown in the following table:

[0031] Sample name code number mass (g) initial fracture displacement (mm) stiffness (Nm / deg) Example 1 US 7.514.5413.250.38 Comparative Example 1 US 7.514.6111.890.36 Comparative Example 2 US 7.514.3512.120.32

[0032] According to the performance test data comparison between the above-mentioned Example 1 and Comparative Example 1, the initial fracture displacement and the stiffness in the example are both higher than those in the comparative example. The present application fixes the fiber layer on the compression side as a polyimide fiber layer, which can increase the initial fracture displacement value of the laminate compared with the laminate with carbon fiber layer on the compression side, and also increase the stiffness, indicating that the material toughness is improved, the energy absorption effect of the shoe sole is better than that of the laminate with carbon fiber on the compression side, the displacement and damage strain when the material fails can be increased, the disadvantage of the brittleness of carbon fiber is compensated, and the elongation, toughness and impact resistance of the composite material are improved.

[0033] According to the performance test data comparison between the above-mentioned Example 1 and Comparative Example 2, the present application uniformly lays the polyimide fiber layer and the carbon fiber layer in the example, which can increase the initial fracture displacement value of the composite material compared with the non-uniform laying of the two fiber layers, and also increase the stiffness value, indicating that the bending and tensile strength of the laminate is increased, the toughness is improved, the ability to resist deformation and damage is enhanced, and the comprehensive performance of the material is improved.

[0034]

Influence of angle

[0035] Example 2

[0036] The present embodiment provides a composite material laminate for shoes, which is arranged with 8 fiber layers from the compression side to the tensile side (as shown in Table 4), wherein the fiber layer arranged on the compression side is the first layer, and the fiber layer arranged on the tensile side is the eighth layer, the different fiber layers are combined together by a resin adhesive, wherein 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. Taking the toe area of the laminate body as the front, taking the heel area of the laminate body as the back, taking 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 fiber laid in the first layer is arranged to be 0° to the reference axis, the fiber in the second layer is 15° to the reference axis, the fiber in the third layer is -15° to the reference axis, the fiber in the fourth layer is 15° to the reference axis, the fiber in the fifth layer is -15° to the reference axis, the fiber in the sixth layer is 0° to the reference axis, the fiber in the seventh layer is 15° to the reference axis, and the fiber in the eighth layer is -15° to the reference axis (the arrangement angles of the two fibers are shown in FIG. 3).

[0037] Layer number angle (°) Material 10 Polyimide fiber 215 Carbon fiber 3-15 Carbon fiber 415 Carbon fiber 5-15 Carbon fiber 60 Polyimide fiber 715 Carbon fiber 8-15 Carbon fiber

[0038] Table 4: Laying manner of Example 2

[0039] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminate for shoes, which comprises the following steps: Step 1: Laying, carbon fibers and polyimide fiber prepreg are laid according to the position order and angle design described in the above-mentioned embodiment to obtain a composite material; Step 2: Cutting, the composite material obtained in Step 1 is cut according to the shape of a mold; Step 3: Forming, the cut composite material is placed into a forming mold, and after pressure and heating, holding and cooling are applied according to the forming conditions, curing forming is completed to obtain a composite material laminate, the curing temperature is 110-220℃, the pressure is 1-3MPa, and the forming time is 5-30min; Step 4: Post-processing, the formed composite material laminate is polished, washed, sandblasted and painted to obtain a composite material laminate for shoes.

[0040] It should be noted that the "prepreg" described herein and in the following embodiments refers to an intermediate state material formed by immersing the carbon fibers or polyimide fibers to be laid in a thermosetting resin adhesive, the fiber brand of the "carbon fiber prepreg" is T300, T400, T700, T800, T1000 or T1100, etc., the fiber brand of the "polyimide fiber prepreg" is S20, S25, S30, S35, S40, and various feasible thermosetting resin adhesive materials can be used in the present application, including epoxy resin, polyurethane, acrylate, etc., and the present application does not limit the specific type of the thermosetting resin adhesive used.

[0041] Example 3

[0042] The present application provides a kind of composite material laminated sheet for shoes, from compression side to tensile side in turn is divided into 8 layers of fiber layer (as shown in table 5), wherein the fiber layer arranged in compression side is first layer, the fiber layer arranged in tensile side is eighth layer, different fiber layers are compounded together by resin adhesive, wherein the first layer is polyimide fiber layer, the second layer is carbon fiber layer, the third layer is carbon fiber layer, the fourth layer is carbon fiber layer, the fifth layer is carbon fiber layer, the sixth layer is polyimide fiber layer, the seventh layer is carbon fiber layer, the eighth layer is carbon fiber layer, with the toe area of the laminated sheet body as front, with the heel area of the laminated sheet body as back, with front-back direction as reference axis, relative to the clockwise direction of reference axis is positive angle, and the counterclockwise direction is negative angle, the fiber of first layer is arranged to be 0 with reference axis, the fiber of second layer is 25 with reference axis, the fiber of third layer is-25 with reference axis, the fiber of fourth layer is 25 with reference axis, the fiber of fifth layer is-25 with reference axis, the fiber of sixth layer is 0 with reference axis, the fiber of seventh layer is 25 with reference axis, and the fiber of eighth layer is-25 with reference axis.

[0043] Layer Angle (°) Material 10 Polyimide fiber 2 5 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

[0044] Table 5: layering mode of example 3

[0045] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminated sheet for shoes, which comprises the following steps: step one: layering, carbon fibers and polyimide fiber prepreg are layered according to the position sequence and angle design described in the above embodiment to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling are applied according to the molding conditions, curing molding is completed to obtain a composite material laminated sheet, the curing temperature is 110-220 ℃, the pressure is 1-3 MPa, and the molding time is 5-30 min; step four: post-treatment, the molded composite material laminated sheet is polished, washed, sandblasted and painted to obtain a composite material laminated sheet for shoes.

[0046] Example 4

[0047] The present application provides a kind of composite material laminated sheet for shoe, from compression side to tensile side in turn is divided into 8 layers of fiber layer (as shown in table 6), wherein the fiber layer arranged in compression side is first layer, the fiber layer arranged in tensile side is eighth layer, different fiber layers are bonded together by resin adhesive, wherein the first layer is polyimide fiber layer, the second layer is carbon fiber layer, the third layer is carbon fiber layer, the fourth layer is carbon fiber layer, the fifth layer is carbon fiber layer, the sixth layer is polyimide fiber layer, the seventh layer is carbon fiber layer, the eighth layer is carbon fiber layer, with the toe area of the laminated sheet body as front, with the heel area of the laminated sheet body as back, with front-back direction as reference axis, relative to the clockwise direction of reference axis is positive angle, and the counterclockwise direction is negative angle, the fiber of first layer is arranged to be 0 ° with reference axis, the fiber of second layer is 45 ° with reference axis, the fiber of third layer is-45 ° with reference axis, the fiber of fourth layer is 45 ° with reference axis, the fiber of fifth layer is-45 ° with reference axis, the fiber of sixth layer is 0 ° with reference axis, the fiber of seventh layer is 45 ° with reference axis, and the fiber of eighth layer is-45 ° with reference axis.

[0048] Layer Angle (°) Material 10 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

[0049] Table 6: layering mode of example 4

[0050] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminated sheet for shoe, which comprises the following steps: step one: layering, carbon fiber and polyimide fiber prepreg are layered according to the position sequence and angle design described in the above embodiment to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling are applied according to the molding conditions, curing molding is completed to obtain a composite material laminated sheet, the curing temperature is 110-220 ℃, the pressure is 1-3 MPa, and the molding time is 5-30 min; step four: post-treatment, the molded composite material laminated sheet is polished, washed, sandblasted and painted to obtain a composite material laminated sheet for shoe.

[0051] The shoe composite laminates of Example 2, Example 3, Example 4 and the same code number of Comparative Example 3 are respectively subjected to performance testing and data comparison. In Comparative Example 3 (as shown in Table 7), the fibers of all layers are not designed in a symmetrical angle, and the fibers of all fiber layers are parallel to the front and rear directions, and the other manufacturing steps are exactly the same as those of Examples 2-4. The properties tested in Examples 2-4 and Comparative Example are initial fracture displacement and stiffness, and the performance testing method used is the Chinese national standard. The initial fracture displacement refers to the displacement of the fiber-reinforced resin-based composite material when the first macroscopic crack or fracture appears in the three-point bending test of the material sample. This displacement corresponds to the time when the material begins to lose integrity or produce obvious cracks, which can reflect the toughness of the material. Generally, the higher the value, the better the toughness of the material. The representative value is the point where the nonlinearity or obvious decline appears on the force-displacement curve. The test method can refer to “GB / T 1449-2005 Fiber Reinforced Plastics Bending Performance Test Method”. The stiffness refers to the ability of a material or component to resist deformation under load. In this technical solution, the stiffness specifically refers to the ability of the flexing part of the sole material to resist elastic deformation under stress. Components with high stiffness are less likely to deform under stress, while components with low stiffness are more likely to deform. The test method for stiffness can refer to “GB / T 32023-2023 Shoe Test Method for Flexing Part Stiffness”.

[0052] Layer number Angle (°) Material 10 Polyimide fiber 20 Carbon fiber 30 Carbon fiber 40 Carbon fiber 50 Carbon fiber 60 Polyimide fiber 70 Carbon fiber 80 Carbon fiber

[0053] Table 7: Layering method of Comparative Example 3

[0054] Examples 2-4 and Comparative Example 3 are respectively subjected to performance testing, and the results are shown in the following table:

[0055] Sample name Code number Mass (g) Initial fracture displacement (mm) Stiffness (Nm / deg) Example 2 US 7.5 20.3 38.9 0.653 Example 3 US 7.5 20.1 48.3 0.637 Example 4 US 7.5 20.6 28.2 0.617 Comparative Example 3 US 7.5 20.4 58.1 0.649

[0056] According to the performance test data of the above-mentioned embodiments 2-4 and comparative example 3, it can be seen that, in the present application, the symmetric angle is designed between different fiber layers, in embodiment 2, the symmetric angle is set to 15 degrees / -15 degrees, compared with comparative example 1 without angle design, the mass of the composite laminated plate is reduced, the shoe is more lightweight, the initial fracture displacement is increased, the toughness of the composite material is enhanced, and the stiffness of the composite material is also enhanced, which improves the impact resistance of the shoe while effectively enhancing the propulsion; in embodiment 3, the symmetric angle is set to 25 degrees / -25 degrees, compared with comparative example 3 without angle design, the mass of the shoe composite laminated plate is reduced, the initial fracture displacement is increased, the toughness of the composite material is stronger, and at the same time, the stiffness of the composite material is not significantly reduced, which improves the impact resistance while maintaining strong propulsion, so that the shoe is not easy to deform; in embodiment 4, the symmetric angle is set to 45 degrees / -45 degrees, compared with comparative example 3 without angle design, the initial fracture displacement is increased, the toughness of the composite material is enhanced, and the stiffness of the composite material is not significantly reduced, which improves the impact resistance while maintaining strong propulsion, so that the shoe is not easy to deform.

[0057] In a further embodiment, a shoe sole member is provided, as shown in Figure 1, which comprises the shoe composite laminated plate in any of the preceding embodiments, and the shoe sole member can be lightweight, has high toughness and moderate rigidity, and has excellent comprehensive performance, and is more suitable for use as a shoe sole member.

[0058] In a further embodiment, a shoe product is provided, comprising the shoe sole member shown in Figure 1, and the shoe product can be lightweight, the shoe sole can consider support and rapid response according to the stress characteristics, has better propulsion performance, and has high user experience.

[0059] The exemplary embodiments of the present application are described in detail herein with reference to the preferred embodiments, however, it can be understood by those skilled in the art that various modifications and changes can be made to the above-mentioned specific embodiments without departing from the concept of the present application, and various technical features and structures proposed in the present application can be combined without exceeding the scope of the present application, and the protection scope of the present application 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 fiber layer on the compression side is a polyimide fiber layer.

2. The composite laminate panel for footwear of claim 1, wherein The plurality of polyimide fiber layers are not adjacent to each other, and each polyimide fiber layer is separated from another polyimide fiber layer by a plurality of carbon fiber layers.

3. The shoe composite laminate of claim 2, wherein, A plurality of carbon fiber layers are laid on a side of each polyimide fiber layer away from the compression side.

4. The shoe composite laminate of any of claims 1-3, wherein, The carbon fiber layers include a plurality of pairs of adjacent carbon fiber layers, in each pair of carbon fiber layers, the fibers of one carbon fiber layer are laid at a clockwise acute angle α with respect to the front-back direction, and the fibers of the other carbon fiber layer are laid at a counterclockwise acute angle α with respect to the front-back direction, and the fibers of the polyimide fiber layer are laid along the front-back direction.

5. The shoe composite laminate of claim 4, wherein The value of α is 15-45 degrees.

6. The shoe composite laminate of claim 3, 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 pairs of adjacent carbon fiber layers are laid between the first polyimide fiber layer and the second polyimide fiber layer, and a pair of pairs of adjacent carbon fiber layers are laid on a side of the second polyimide fiber layer away from the first polyimide fiber layer.

7. A shoe sole member comprising the shoe composite laminate of claims 1-6.

8. A shoe product comprising the shoe sole member of claim 7. The method comprises the following steps:

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, Step 1: Laying up, laying up carbon fibers and polyimide fiber prepreg 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: Forming, placing the cut composite material into a forming mold, and after applying pressure and heating, holding and cooling according to the forming conditions, completing the curing forming to obtain a composite laminate. The method further comprises 10. The method of claim 9, wherein, Step 4: Post-processing, polishing, cleaning, sandblasting and painting the formed composite laminate. The curing temperature is 110-220°C, the pressure is 1-3MPa, and the forming time is 5-30min.

11. The preparation method according to claim 9, characterized in that, ​

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