Folding-resistant 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 folding-resistant laminated plate, a sole, a shoe and a laminated plate manufacturing method. The folding-resistant laminated plate comprises a middle layer group and a carbon fiber layer, the middle layer group comprises a basalt fiber layer, and the laying angle of the basalt fiber layer is 0 or 90 degrees; or the middle layer group comprises at least two basalt fiber layers which are stacked in sequence, and the laying angles of every two adjacent basalt fiber layers are 0 degree and 90 degrees respectively; or the middle layer group comprises two basalt fiber layers, and the laying angles of the two basalt fiber layers are 90 degrees. The sole and the shoe both comprise the folding-resistant laminated plate. The carbon fiber layers are compounded on the two sides of the middle layer, and the laying angle of the basalt fiber layer in the middle layer is limited, so that rigidity attenuation after multiple times of bending can be slowed down, the bending resistance is improved, meanwhile, the ductility of the laminated plate can be improved, brittle failure is avoided, and the structure is not prone to failure.

Description

Technical Field

[0001] The invention relates to a shoe material and a manufacturing method thereof, in particular to a folding-resistant 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 only formed by laying carbon fiber prepreg. Although this type of carbon fiber laminate can make the finished shoes have good stiffness in the initial use, after long-term use and repeated bending, the stiffness decays significantly and is not resistant to bending, which affects the product experience. In addition, this type of carbon fiber laminate has a low elongation and is easy to break brittlely. It is easy to bend and break under high-frequency running and jumping and large-angle bending, which leads to structural failure.

[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 object of the present invention is to provide a folding-resistant laminate, a sole, a shoe and a method for manufacturing the laminate which are resistant to bending and not prone to structural failure.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A folding-resistant laminate, comprising an intermediate layer group and carbon fiber layers respectively attached to two sides of the intermediate layer group; The intermediate layer group includes a basalt fiber layer, and the laying angle of the basalt fiber layer is 0 or 90°; or The intermediate layer group comprises at least two basalt fiber layers stacked in sequence, the laying angles of two adjacent basalt fiber layers are 0° and 90° respectively, and the laying angles of two adjacent basalt fiber layers are different from each other; or The intermediate layer group includes two basalt fiber layers and the carbon fiber layer located between the two basalt fiber layers. The laying angles of the two basalt fiber layers are both 90°, and the laying angle of the carbon fiber layer located between the two basalt fiber layers is 0°.

[0007] As an improvement of the present invention, the ply ratio of the carbon fiber layer to the basalt fiber layer is 1:1-3.

[0008] As an improvement of the present invention, each of the basalt fiber layers and each of the carbon fiber layers are plies, the plies have eight layers, and the laying angles of each of the plies are 25°, -25°, 0, 90°, 0, 90°, 25° and -25° from downward.

[0009] As an improvement of the present invention, two adjacent plies are bonded and connected by a resin adhesive, and each ply is a multi-layer fiber structure.

[0010] A shoe sole comprises a midsole, wherein the inner part or outer surface of the midsole is compounded with the above-mentioned folding-resistant laminate.

[0011] A shoe comprises a sole and an upper which are fixedly connected to each other, wherein the sole adopts the above-mentioned sole.

[0012] A method for manufacturing a folding-resistant laminate comprises the following steps: S1. Laying layers, using carbon fiber prepreg and basalt fiber prepreg to lay layers to obtain a composite material; S2. Forming: placing the composite material into a hot pressing forming mold and sequentially performing hot pressing treatment, heat preservation treatment and cooling and curing treatment to obtain the folding-resistant laminate as claimed in any one of claims 1 to 4.

[0013] As an improvement of the present invention, in step S2, 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.

[0014] As an improvement of the present invention, in step S2, after the composite material is cooled and solidified, it is also polished, cleaned, sandblasted and / or painted.

[0015] As an improvement of the present invention, in step S2, the temperature of the hot pressing treatment is 110-220°C, the pressure is 1-3MPa, and the time of the heat preservation treatment is 5-30min.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: By compounding carbon fiber layers on both sides of the middle layer mainly composed of basalt fiber layers and limiting the laying angle of the basalt fiber layer in the middle layer, the stiffness attenuation after multiple bending can be slowed down, the bending resistance can be improved, and at the same time the elongation of the laminate can be increased, brittle fracture can be avoided, and the structure is not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the structure of the laminate in Example 1; Figure 2 Schematic diagram of the structure of the laminate in Example 7.

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

[0019] The present invention provides a composite fiber laminate and a folding-resistant laminate. The two have different structures but the same main manufacturing process and similar performance. Both have good bending resistance and a large bending angle. They are not prone to bending and fracture under high-frequency running and large-angle bending, and have good structural stability.

[0020] Embodiments 1-7 provided by the present invention are all a composite fiber laminate, comprising a surface layer group and a base layer group bonded to each other, wherein the surface layer group comprises at least two basalt fiber layers stacked in sequence from top to bottom, and the base layer group comprises at least one carbon fiber layer, and the layer ratio of the above carbon fiber layers to the basalt fiber layers is 1:1-7 or 3:1.

[0021] Embodiments 7-10 provided by the present invention are all folding-resistant laminates, comprising an intermediate layer group and carbon fiber layers respectively attached to both sides of the intermediate layer group; wherein the intermediate layer comprises at least one basalt fiber layer, and the laying angle of the basalt fiber layer is 0 or 90°. The ply ratio of the carbon fiber layer to the basalt fiber layer is preferably 1:1-3.

[0022] For ease of expression, each carbon fiber layer 10 and each basalt fiber layer 20 is referred to as a ply. In the present invention, the laying angle of each fiber layer refers to the angle between the fiber extension direction of the corresponding fiber layer and the reference direction, with the clockwise direction being positive. The reference direction is a direction pre-set during production and can be any direction. Preferably, in each embodiment of the present invention, there are eight plies, and the laying angles of each ply are 25°, -25°, 0, 90°, 0, 90°, 25° and -25° from downward.

[0023] Preferably, two adjacent plies are connected by bonding with a resin adhesive, the resin grade is WP-S5001, and each ply is a multi-layer fiber structure.

[0024] The structure and layers of each embodiment are described below.

[0025] Example 1 like Figure 1 As shown, the surface layer group of the composite fiber laminate provided in this embodiment includes two mutually stacked basalt fiber layers 20, and the base layer group includes six sequentially stacked carbon fiber layers 10. The specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are shown in the following table.

[0026]

[0027] Example 2 The composite fiber laminate provided in this embodiment has two surface layer groups, and the base layer group is located between the two surface layer groups. The surface layer group includes two basalt fiber layers stacked on each other, and the base layer group includes four carbon fiber layers stacked in sequence. The specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are shown in the following table.

[0028]

[0029] Example 3 The composite fiber laminate provided in this embodiment is essentially a folding-resistant laminate, which has two surface layer groups, and the base layer group is located between the two surface layer groups, wherein the upper surface layer group includes two mutually stacked basalt fiber layers, and the lower surface layer group includes three sequentially stacked basalt fiber layers, and the base layer group includes a basalt fiber layer and carbon fiber layers respectively adhered to both sides of the basalt fiber layer. The specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are shown in the following table.

[0030]

[0031] Example 4 The composite fiber laminate provided in this embodiment is also a folding-resistant laminate, which has two surface layer groups, and the base layer group is located between the two surface layer groups, wherein the lower surface layer group includes two mutually stacked basalt fiber layers, and the upper surface layer group includes three sequentially stacked basalt fiber layers, and the base layer group (also referred to as the middle layer) includes a basalt fiber layer and carbon fiber layers respectively attached to both sides of the basalt fiber layer, that is, the middle layer group includes a basalt fiber layer, and the laying angle of the basalt fiber layer can be 0 or 90°. In this embodiment, the laying angle of the basalt fiber layer is 0. The specific number of layers (the number of layers is arranged in order from top to bottom), the laying angle and the laying material are shown in the following table.

[0032]

[0033] Example 5 The composite fiber laminate provided in this embodiment has two surface layer groups, and the base layer group is located between the two surface layer groups, wherein the upper surface layer group includes five basalt fiber layers stacked in sequence, and the lower surface layer group includes two basalt fiber layers stacked in sequence, and the base layer group includes a carbon fiber layer. The specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are shown in the following table.

[0034]

[0035] Example 6 The composite fiber laminate provided in this embodiment has two surface layer groups, and the base layer group is located between the two surface layer groups, wherein the upper surface layer group includes three basalt fiber layers stacked in sequence, and the lower surface layer group includes four basalt fiber layers stacked in sequence, and the base layer group includes a carbon fiber layer. The specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are shown in the following table.

[0036]

[0037] Example 7 like Figure 2 As shown, the folding-resistant laminate provided in this embodiment includes an intermediate layer comprising more than two sequentially stacked basalt fiber layers 20, the laying angles of two adjacent basalt fiber layers 20 are 0 and 90° respectively, and the laying angles of two adjacent basalt fiber layers 20 are different from each other. In this embodiment, the intermediate layer includes four sequentially stacked basalt fiber layers 20 as an example for explanation, and two sequentially stacked carbon fiber layers 10 are attached to the upper and lower sides of the intermediate layer. The specific number of layers (the number of layers is arranged in order from top to bottom), the laying angle and the layer material are shown in the following table.

[0038]

[0039] Example 8 The difference between the folding-resistant laminate provided in this embodiment and that in Embodiment 1 is that in this embodiment, the carbon fiber layers of the 5th and 6th plies in Embodiment 1 are replaced with basalt fiber layers, so that the 5th and 6th plies form an intermediate layer. The specific number of plies (the number of plies is arranged in order from top to bottom), laying angles and ply materials are shown in the following table.

[0040]

[0041] Example 9 The difference between the folding-resistant laminate provided in this embodiment and that in Embodiment 4 is that in this embodiment, the basalt fiber layers of the 7th and 8th plies in Embodiment 4 are replaced with carbon fiber layers, and the specific number of plies (the number of plies is arranged in order from top to bottom), laying angles and ply materials are shown in the following table.

[0042]

[0043] Example 10 The folding-resistant laminate provided in this embodiment is essentially a composite fiber laminate, wherein the middle layer group includes two basalt fiber layers and a carbon fiber layer located between the two basalt fiber layers, wherein the laying angles of the two basalt fiber layers are both 90°, and the laying angle of the carbon fiber layer located between the two basalt fiber layers is 0. A carbon fiber layer is attached to the upper side of the middle layer, and a surface layer group is also attached to the upper layer of the carbon fiber layer, the surface layer group includes two mutually bonded basalt fiber layers, and two carbon fiber layers are sequentially bonded to the lower side of the middle layer. The specific number of layers (the number of layers is arranged in order from top to bottom), laying angles and laying materials are shown in the following table.

[0044]

[0045] The present invention also provides a carbon fiber laminate made only of carbon fiber prepreg and a basalt fiber laminate made only of basalt fiber prepreg as comparative examples, 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: Comparative Example 1

[0046] Comparative Example 2

[0047] Embodiment 11 The present embodiment provides a sole, including a midsole, the inner or outer surface of the midsole is composited with a composite fiber laminate, a folding-resistant laminate, a carbon fiber laminate or a basalt fiber laminate, wherein the laminate adopts any of the laminates provided in the above-mentioned embodiments 1-10 and comparative examples 1-2.

[0048] 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.

[0049] Example 12 This embodiment provides a finished shoe, including a sole and an upper fixedly connected to each other, and the sole adopts the sole provided in Example 11.

[0050] Example 13 This embodiment provides a method for manufacturing a composite fiber laminate or a folding-resistant laminate, which is used to obtain the laminate in Embodiments 1-10, and comprises the following steps: S1. Lamination: Carbon fiber prepreg and basalt fiber prepreg are laid in accordance with the required number of plies, angles and material requirements of the desired laminate to obtain a composite material. The specific lamination process is the same as the conventional laminate lamination process and is not the focus of this embodiment and will not be described in detail here.

[0051] The fiber grades used in carbon fiber prepreg are T400, T700, T100 or T1100; the basalt fiber grade is BF825K.

[0052] S2, 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 an 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.

[0053] Preferably, in step S2, after cutting is completed, a pressure shaping device is used to pre-shape the cut composite material, and then the composite material is placed in a pressure shaping mold for processing, which helps to improve the shaping efficiency and reduce the internal stress of the material.

[0054] The difference between the laminate manufacturing method of the comparative example provided by the present invention and the laminates of the above-mentioned embodiments is that only carbon fiber prepreg and basalt fiber prepreg are used during the plying.

[0055] The laminates of Examples 1-10 and Comparative Examples 1-2 were subjected to initial tear force tests and initial tear displacement tests, respectively. At the same time, the finished shoes made of the laminates of Examples 1-10 and Comparative Examples 1-2 were subjected to initial stiffness tests and stiffness tests after 200,000 bendings (the stiffness test method and standard of the finished shoes refer to GB / T 32023-2023 "Footwear Whole Shoe Test Method Flexure Part Stiffness"), and the following test data were obtained:

[0056] In the above table, the sample size refers to the size of the finished shoe being tested, and the limit bending times refers to the number of times the finished shoe is bent when the stiffness after bending is less than or equal to 60% of the initial stiffness of the finished shoe. Generally speaking, the larger the initial fracture displacement of the laminate, the larger the bending angle. In the above test, a three-point bending test was used with a fixed span of 46mm, and the bending angle was obtained by taking the inverse trigonometric function of the initial fracture displacement of the laminate.

[0057] According to the test results, compared with simple carbon fiber laminates, the initial tear displacement, bendable angle, finished shoe stiffness, limit bending times, and finished shoe stiffness after 200,000 bends of the laminates provided in each embodiment are significantly improved. Compared with simple basalt fiber laminates, the initial tear force values ​​of the laminates provided in each embodiment are also significantly improved. Under the premise of ensuring a certain amount of breaking force value, the larger the breaking displacement or the larger the bendable angle, the less likely the product will bend and break. It can be seen that the soles made of the laminates provided in this embodiment are not prone to bending and breaking under high-frequency running and large-angle bending.

[0058] 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 folding-resistant laminate, characterized in that: It includes an intermediate layer group and carbon fiber layers respectively attached to two sides of the intermediate layer group; The intermediate layer group includes a basalt fiber layer, and the laying angle of the basalt fiber layer is 0 or 90°; or The intermediate layer group comprises at least two basalt fiber layers stacked in sequence, the laying angles of two adjacent basalt fiber layers are 0° and 90° respectively, and the laying angles of two adjacent basalt fiber layers are different from each other; or The intermediate layer group includes two basalt fiber layers and the carbon fiber layer located between the two basalt fiber layers. The laying angles of the two basalt fiber layers are both 90°, and the laying angle of the carbon fiber layer located between the two basalt fiber layers is 0°.

2. The folding-resistant laminate according to claim 1, characterized in that: The ply ratio of the carbon fiber layer to the basalt fiber layer is 1:1-3.

3. The folding-resistant laminate according to claim 1, characterized in that: Each of the basalt fiber layers and each of the carbon fiber layers is a ply, there are eight plies, and the laying angles of each of the plies are 25°, -25°, 0, 90°, 0, 90°, 25° and -25° from downward.

4. The folding-resistant laminate according to claim 3, characterized in that: Two adjacent layers are connected by bonding with a resin adhesive, and each layer is a multi-layer fiber structure.

5. A shoe sole, comprising a midsole, characterized in that: The inner or outer surface of the midsole is compounded with the folding-resistant laminate as claimed in any one of claims 1 to 4.

6. A shoe comprising a sole and an upper fixedly connected to each other, characterized in that: The sole adopts the sole as claimed in claim 5.

7. A method for manufacturing a folding-resistant laminate, characterized in that: The following steps are involved: S1. Laying layers, using carbon fiber prepreg and basalt fiber prepreg to lay layers to obtain a composite material; S2. Forming: placing the composite material into a hot pressing forming mold and sequentially performing hot pressing treatment, heat preservation treatment and cooling and curing treatment to obtain the folding-resistant laminate as claimed in any one of claims 1 to 4.

8. The method for manufacturing the folding-resistant laminate according to claim 7, characterized in that: In step S2, 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.

9. The method for manufacturing the folding-resistant laminate according to claim 7, characterized in that: In step S2, after the composite material is cooled and solidified, it is also polished, cleaned, sandblasted and / or painted.

10. The method for manufacturing the folding-resistant laminate according to claim 7, characterized in that: In step S2, the temperature of the hot pressing treatment is 110-220°C, the pressure is 1-3MPa, and the time of the heat preservation treatment is 5-30min.

Images