Carbon fiber laminated plate, sole, shoe and laminated plate manufacturing method

Abstract

The invention relates to a shoe material and a manufacturing method thereof, in particular to a carbon fiber laminated plate, a sole, a shoe and a laminated plate manufacturing method. The carbon fiber laminated plate comprises a plurality of carbon fiber layers which are sequentially stacked and laid from bottom to top, and a net-shaped cast film is laid between every two adjacent carbon fiber layers. The sole provided by the invention comprises a midsole, and the carbon fiber laminated plate is compounded inside or on the outer surface of the midsole. The shoe provided by the invention comprises the sole and the vamp which are fixedly connected with each other, and the sole adopts the sole. The manufacturing method of the carbon fiber laminated plate comprises the steps of material preparation, layer laying, forming and the like. According to the invention, the reticular cast film is laid between the adjacent carbon fiber layers, so that the vibration damping of the carbon fiber laminated plate is effectively improved, the vibration and impact generated when the carbon fiber plate is used are reduced, and the stability and safety of running shoes are improved.

Description

Technical Field

[0001] The invention relates to a shoe material and a manufacturing method thereof, in particular to a carbon fiber laminate, a sole, a shoe and a manufacturing method of the laminate. Background Art

[0002] Carbon fiber laminates (also called carbon plates) are increasingly used in sports shoes, especially in marathon running shoes and professional competitive basketball shoes. Applying carbon fiber laminates to sports shoes can effectively improve the support performance of sports shoes, provide better energy feedback, and thus improve various sports indicators.

[0003] Traditional carbon fiber laminates for shoes are usually formed by laying only carbon fiber prepreg. Although fibers of other components are added to some carbon fiber laminates for shoes, each layer is still formed by laying fiber prepreg. The vibration damping of the carbon fiber laminate obtained by this method is relatively low. However, during high-speed running, the running shoes worn by runners will be repeatedly impacted by the vertical ground reaction force. This impact will cause the carbon fiber laminate to produce a relatively high vibration frequency, which is not conducive to the stability of the running shoes and will increase the risk of injury to the runners during running. The safety needs to be improved.

[0004] In view of this, the inventor conducted an in-depth study on the above-mentioned problem, and thus the present invention was produced. Summary of the invention

[0005] The purpose of the present invention is to provide a carbon fiber laminate, a sole, a shoe and a method for manufacturing the laminate, which are helpful to improve the stability and safety of running shoes.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A carbon fiber laminate comprises a plurality of carbon fiber layers stacked and laid in sequence from bottom to top, wherein a mesh cast film is laid between two adjacent carbon fiber layers.

[0007] As an improvement of the present invention, the material of the mesh cast film is a styrene-based thermoplastic elastomer compound.

[0008] As an improvement of the present invention, there are more than two mesh cast films, and two adjacent mesh cast films are separated by two carbon fiber layers.

[0009] As an improvement of the present invention, the mesh cast film is attached to the lower surface of the carbon fiber layer located at the bottom.

[0010] As an improvement of the present invention, each of the carbon fiber layers and the mesh cast film is a ply, and every three adjacent plies from bottom to top form a layer group, and the laying angles of each ply in each layer group are 0, -15° and +15° or 0, +15° and -15° from bottom to top, and when the ply is the mesh cast film, the laying angle of the ply is 0.

[0011] A shoe sole comprises a midsole, wherein the interior or the outer surface of the midsole is composited with the carbon fiber laminate.

[0012] A shoe comprises a sole and an upper which are fixedly connected to each other, wherein the sole adopts the above-mentioned sole.

[0013] A method for manufacturing a carbon fiber laminate comprises the following steps: S1, preparing materials, processing the styrene-based thermoplastic elastomer compound into a mesh shape by using a tape casting process to obtain a mesh cast film; S2, laying out layers by using the carbon fiber prepreg and the mesh cast film to obtain a composite material; S3, molding, placing the composite material into a hot pressing molding mold and sequentially performing hot pressing treatment, heat preservation treatment and cooling and curing treatment to obtain the above-mentioned carbon fiber laminate.

[0014] As an improvement of the present invention, in step S3, before placing the composite material into the hot pressing mold, the composite material is cut according to the shape of the cavity of the hot pressing mold.

[0015] As an improvement of the present invention, in step S3, after the composite material is cooled and solidified, it is also polished, cleaned, sandblasted and / or painted.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: The present invention effectively improves the vibration damping of the carbon fiber laminate by laying a mesh cast film between adjacent carbon fiber layers, reduces the vibration and impact generated when the carbon fiber plate is used, and helps to improve the stability and safety of running shoes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the carbon fiber laminate in the embodiment.

[0018] The corresponding markings in the figure are as follows: 10-carbon fiber layer; 20-net cast film; DETAILED DESCRIPTION The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, the present invention provides a carbon fiber laminate, comprising a plurality of carbon fiber layers 10 stacked and laid in sequence from bottom to top, wherein the carbon fiber layer 10 is a carbon fiber layer used in conventional shoe carbon plates, and a mesh cast film 20 is laid between two adjacent carbon fiber layers 10. The material of the mesh cast film is a styrene-based thermoplastic elastomer compound, and the cross-sectional shape of the mesh can be determined according to actual needs, for example, it can be circular, square, triangular or trapezoidal, etc., and the inner contour diameter of the mesh is usually 0.5-1.0 mm.

[0020] The number of the reticulated casting film 20 can be only one or more than two. When there are more than two reticulated casting films 20, two carbon fiber layers 10 are spaced between two adjacent reticulated casting films 20. In addition, if necessary, a reticulated casting film 20 can also be attached to the lower surface of the lowest carbon fiber layer 10.

[0021] For ease of expression, each carbon fiber layer 10 and mesh cast film 20 is referred to as a ply, and every three adjacent plies from bottom to top form a layer group, that is, the total number of plies is a multiple of 3, and the laying angles of each ply in each layer group are 0, -15° and +15° from bottom to top, or 0, +15° and -15°, and when the ply is a mesh cast film 20, the laying angle of the ply is 0. It should be noted that the laying angle of the carbon fiber layer 10 in the present invention refers to the angle between the fiber extension direction of each carbon fiber layer 10 and the reference direction, with the clockwise direction being positive, wherein the reference direction is a direction pre-set during production and can be any direction; since the mesh cast film 20 in the present invention does not have a fiber extension direction, it actually does not have a laying angle. For the sake of convenience, the laying angle of this type of ply without a laying angle is defined as 0 in the present invention. That is to say, when the laying angle of the ply is 0, there are two situations, one is that there are fibers in the ply and the fiber extension direction of the ply is the same as the reference direction, and the other is that there are no fibers in the ply.

[0022] The present invention provides three specific carbon fiber laminate structures as embodiments, and the specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are as follows: Example 1

[0023] The thickness of each carbon fiber layer 10 in the carbon fiber laminate is the same, and the total thickness of the entire carbon fiber laminate is 1.26±0.05 mm.

[0024] Example 2

[0025] The thickness of each carbon fiber layer 10 in the carbon fiber laminate is the same, the thickness of each mesh cast film 20 is also the same, and the total thickness of the entire carbon fiber laminate is 1.33±0.05 mm.

[0026] Example 3

[0027] The thickness of each carbon fiber layer 10 in the carbon fiber laminate is the same, the thickness of each mesh cast film 20 is also the same, and the total thickness of the entire carbon fiber laminate is 1.36±0.05 mm.

[0028] In addition, the present invention also provides a carbon fiber laminate made only by carbon fiber prepreg as a comparative example, and the specific number of layers (the number of layers is arranged in order from top to bottom), laying angle and laying material are as follows: Comparative Example 1

[0029] The thickness of each carbon fiber layer 10 in the carbon fiber laminate is the same, and the total thickness of the entire carbon fiber laminate is 1.21±0.05 mm.

[0030] The present invention also provides a sole, including a midsole, wherein the carbon fiber laminate of any of the above embodiments is composited on the inner or outer surface of the midsole, and the specific composite method is the same as that of a conventional carbon plate sole, which is not the focus of this embodiment and will not be described in detail here. The ply reference direction of the carbon fiber laminate is the same as the length direction of the sole.

[0031] The present invention also provides a shoe, comprising a sole and an upper fixedly connected to each other, wherein the sole adopts the above-mentioned sole, and the specific connection structure between the sole and the upper is a conventional structure, which will not be described in detail here.

[0032] The method for manufacturing the carbon fiber laminate in each of the above embodiments comprises the following steps: S1. Prepare materials, process the styrene-based thermoplastic elastomer compound into a mesh shape by a conventional tape casting process, and obtain a mesh cast film, wherein the thickness of the mesh cast film is 0.12±0.01 mm.

[0033] S2. Laying layers using carbon fiber prepreg and mesh cast film according to the number of layers, angles and material requirements of the laminate to be obtained, to obtain a composite material.

[0034] S3, molding, cutting the composite material according to the shape of the cavity of the hot pressing mold, the shape of the cavity can be set according to the actual product needs, for example, it can be set to the shape of a shoe carbon plate or a shoe insole, etc., and then the cut composite material is placed in a hot pressing mold for hot pressing treatment, heat preservation treatment and cooling and curing treatment in sequence. If necessary, it can also be polished, cleaned, sandblasted and / or painted after cooling and curing to obtain a carbon fiber laminate. The above-mentioned processing processes are all conventional processes and will not be described in detail here. Preferably, the curing temperature is 110-220°C, the pressure is 1-3MPa, and the molding time is 5-30min.

[0035] The difference between the carbon fiber laminate manufacturing method of the comparative example provided by the present invention and the carbon fiber laminate of the above embodiments is that the carbon fiber laminate manufacturing method of the comparative example does not need to perform step S1, and does not need to use a mesh cast film for lamination in step S2.

[0036] In order to verify the performance of the carbon fiber laminate provided by the present invention, a dynamic mechanical analyzer (DMA) was used to perform isothermal frequency scanning on each embodiment and comparative example: that is, under isothermal conditions, scanning tests were performed under different vibration frequency stresses to obtain the storage modulus E', loss modulus E'', and loss factor tanδ as shown in the following table.

[0037]

[0038] The above test refers to "GB / T 1449-2005 Test Method for Bending Properties of Fiber Reinforced Plastics" to measure the bending strength (MPa) and bending modulus (GPa) of the sample. According to the test results, the use of the mesh cast film 20 increases the loss factor of the carbon fiber laminate from 0.148 to 0.233. Since the loss factor is an important parameter for measuring the damping performance of the material, it is equal to the ratio of the loss modulus of the material to the storage modulus. When the loss factor of the material is measured, the greater the damping performance of the material, the greater the material, that is, the material can consume more energy under dynamic loading, thereby providing better vibration reduction and noise reduction effects. Therefore, at a specific frequency, the greater the loss factor, the faster the vibration attenuation of the object, and the faster the speed of restoring the stable state. It can be seen that when the carbon fiber laminate provided by each embodiment is used as a shoe carbon plate, the vibration and impact of the carbon plate during exercise can be effectively reduced, the stability of the carbon plate can be improved, and the sports performance can be improved.

[0039] The present invention is described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, which all belong to the protection scope of the present invention.

Claims

1. A carbon fiber laminate, comprising a plurality of carbon fiber layers stacked in sequence from bottom to top, characterized in that: A mesh cast film is laid between two adjacent carbon fiber layers.

2. The carbon fiber laminate according to claim 1, characterized in that: The material of the mesh cast film is a styrene-based thermoplastic elastomer compound.

3. The carbon fiber laminate according to claim 1, characterized in that: There are more than two mesh cast films, and two adjacent mesh cast films are separated by two carbon fiber layers.

4. The carbon fiber laminate according to claim 3, characterized in that: The net-shaped cast film is attached to the lower surface of the carbon fiber layer located at the bottom.

5. The carbon fiber laminate according to claim 1, characterized in that: Each of the carbon fiber layers and the mesh cast film is a ply, and every three adjacent plies from bottom to top form a layer group. The laying angles of each ply in each layer group are 0, -15° and +15° or 0, +15° and -15° from bottom to top, and when the ply is the mesh cast film, the laying angle of the ply is 0.

6. A shoe sole, comprising a midsole, characterized in that: The inner or outer surface of the midsole is compounded with the carbon fiber laminate as claimed in any one of claims 1-5.

7. A shoe comprising a sole and an upper fixedly connected to each other, characterized in that: The sole is the sole as claimed in claim 6.

8. A method for manufacturing a carbon fiber laminate, characterized in that: The following steps are involved: S1, preparing materials, processing the styrene-based thermoplastic elastomer compound into a mesh shape by using a tape casting process to obtain a mesh cast film; S2, laying out layers by using the carbon fiber prepreg and the mesh cast film to obtain a composite material; S3, molding, placing the composite material into a hot pressing molding mold and sequentially performing hot pressing treatment, heat preservation treatment and cooling and curing treatment to obtain the carbon fiber laminate as claimed in any one of claims 1 to 5.

9. The method for manufacturing a carbon fiber laminate according to claim 8, characterized in that: In step S3, before placing the composite material into the hot pressing mold, the composite material is cut according to the cavity shape of the hot pressing mold.

10. The method for manufacturing a carbon fiber laminate according to claim 8, characterized in that: In step S3, after the composite material is cooled and solidified, it is also polished, cleaned, sandblasted and / or painted.

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