Graphene propulsion plate shoe sole

Abstract

The application relates to a graphene propelling plate shoe sole, which comprises a shoe sole body, the front direction of the shoe sole body corresponds to the front part of the sole, the rear direction of the shoe sole body corresponds to the heel, a propelling plate extending in the front-rear direction is embedded in the shoe sole body, and the propelling plate is a plate body containing graphene. After the technical scheme is adopted, graphene is added in the propelling plate, the strength of the propelling plate can be improved, the shoe sole can be made lighter and thinner under the condition of meeting the basic strength and toughness, and the weight of the shoe sole is reduced.

Description

Technical Field

[0001] This invention relates to a graphene-driven shoe sole. Background Technology

[0002] Running shoes, such as marathon shoes, need to be lightweight and offer good support and rebound to reduce the burden on the shoes during long runs. Incorporating carbon fiber plates (industry-referred to as carbon plates) or nylon plates into running shoes to assist foot propulsion is a common practice. For example, Chinese utility model patent CN216651478U, entitled "A Carbon Plate Support Running Shoe Sole," discloses a carbon plate support running shoe with a carbon plate placed between the first and second midsoles. Another example is Chinese utility model patent CN212630069U, entitled "A Fast Rebound Stable Shoe Sole," which discloses a fast rebound stable shoe sole with a support plate made of nylon placed between the midsole and outsole, or within the midsole.

[0003] In the industry, in order to ensure the rigidity of the support plate for propulsion, the support plate is required to have a certain strength. The thickness of the support plate is generally more than 1mm, and its weight is relatively large, which will affect the running experience. If the support plate is made too thin, the strength will be insufficient, affecting the rebound propulsion performance.

[0004] In view of this, the inventors of this case conducted in-depth research on the above-mentioned problems, which led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide a graphene propulsion plate shoe sole that can improve strength.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A graphene-based propulsion plate shoe sole includes a sole body, with the direction of the sole body corresponding to the front of the foot being "forward" and the direction of the sole body corresponding to the heel being "backward". A propulsion plate extending in the forward-backward direction is embedded in the sole body, and the propulsion plate is a plate containing graphene.

[0008] In a preferred embodiment of the present invention, the thickness of the push plate is 0.5-1.5 mm.

[0009] In a preferred embodiment of the present invention, the propulsion plate comprises multiple thermosetting composite layers, the layers being composed of multiple graphene fibers arranged together.

[0010] In a preferred embodiment of the present invention, the propulsion plate comprises multiple thermosetting composite layers, the layers being composed of multiple graphene-reinforced fibers arranged together, the graphene-reinforced fibers being obtained by mixing carbon fiber precursors and graphene sheets through spinning and carbonization.

[0011] In a preferred embodiment of the present invention, the propulsion plate comprises multiple thermosetting composite layers, the layers being composed of multiple graphene-reinforced fibers arranged together, the graphene-reinforced fibers being a blend of carbon fiber and graphene fiber.

[0012] In a preferred embodiment of the present invention, the propulsion plate contains one or more graphene layers, the thickness of which is no greater than 0.4 nm.

[0013] In a preferred embodiment of the present invention, the propulsion plate further includes a substrate, and the graphene layer is laminated on the substrate.

[0014] In a preferred embodiment of the present invention, the substrate is a TPU board, a nylon board, an aramid board, or a carbon fiber board.

[0015] As a preferred embodiment of the present invention, the push plate is provided with a perforated hole for reducing weight, the perforated hole extending from the upper surface to the lower surface of the push plate.

[0016] In a preferred embodiment of the present invention, the sole body comprises a first midsole and a second midsole bonded together, and the propulsion plate is disposed between the first midsole and the second midsole.

[0017] In a preferred embodiment of the present invention, the sole body includes a midsole and an outsole bonded to the lower surface of the midsole, wherein the propulsion plate is disposed on the upper surface of the midsole or the lower surface of the midsole.

[0018] In a preferred embodiment of the present invention, the position of the sole body corresponding to the front of the foot is the forefoot part, the position corresponding to the heel is the heel part, and the position corresponding to the arch of the foot is the midsection part, and the propulsion plate is provided corresponding to one or more of the forefoot part, midsection part, and heel part.

[0019] By adopting the technical solution of this invention, adding graphene to the propulsion plate can improve the strength of the propulsion plate. While meeting the basic strength and toughness requirements, this invention can be made lighter and thinner, reducing the weight of the shoe sole. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the first embodiment of the propulsion plate in this invention.

[0022] Figure 3 This is a schematic diagram of the second embodiment of the propulsion plate in this invention.

[0023] Figure 4 This is a schematic diagram of the third embodiment of the propulsion plate in this invention.

[0024] Figure 5 This is a schematic diagram of the structure of the fourth embodiment of the propulsion plate in this invention.

[0025] Figure 6 This is a schematic cross-sectional view of the first type of propulsion plate of the present invention.

[0026] Figure 7 This is a schematic cross-sectional view of the graphene fiber in this invention.

[0027] Figure 8 This is a second cross-sectional schematic diagram of the propulsion plate of the present invention.

[0028] Figure 9 This is a schematic cross-sectional view of the graphene-reinforced fiber in this invention.

[0029] Figure 10 This is a schematic diagram of another structure of graphene-reinforced fiber in this invention.

[0030] Figure 11 This is a schematic diagram of a third cross-section of the propulsion plate of the present invention.

[0031] Figure 12 This is a schematic diagram of the fourth cross-section of the propulsion plate of the present invention.

[0032] In the picture:

[0033] First mid-bottom 11 Second mid-bottom 12

[0034] Propeller plate 20, hollow hole 21

[0035] Layer 22 Graphene layer 23

[0036] Substrate 24, base 30

[0037] Forefoot 101, Mid-waist 102

[0038] Heel section 103 Graphene fiber 100

[0039] Graphene-reinforced fiber 200, carbon fiber 300 Detailed Implementation

[0040] To further explain the technical solution of the present invention, the following detailed description is provided in conjunction with embodiments.

[0041] Reference Figures 1 to 12A graphene-based propulsion plate shoe sole includes a sole body. The direction of the sole body corresponding to the forefoot is designated as "forward," and the direction corresponding to the heel is designated as "rear." The position of the sole body corresponding to the forefoot is designated as a forefoot portion 101, the position corresponding to the heel is designated as a heel portion 103, and the position corresponding to the arch is designated as a mid-section 102. A propulsion plate 20 extending in the forefoot-rear direction is embedded in the sole body. The propulsion plate 20 is a graphene-containing plate. The propulsion plate 20 of this application is used in the sole to assist foot propulsion. Graphene can exist in the plate in various ways, which will be described in detail below.

[0042] In a preferred embodiment of the present invention, the thickness of the propulsion plate 20 is 0.5-1.5 mm. Commercially available propulsion plates 20 typically have a thickness of 1 mm or more to meet strength and propulsion performance requirements. However, due to the addition of graphene, the propulsion plate 20 of the present invention can be made thinner, for example, 0.7 mm or 0.8 mm, while maintaining the same strength or propulsion performance. At the same thickness, the propulsion plate 20 of this application exhibits higher strength.

[0043] like Figure 6 and Figure 7 As shown, in this embodiment, the propulsion plate 20 includes multiple thermosetting composite layers 22, each layer 22 being composed of multiple graphene fibers 100 arranged together. The layers 22 can be bonded together using epoxy resin or an adhesive film layer. Currently, the common method for manufacturing carbon fiber plates involves impregnating carbon fiber bundles with epoxy resin and flattening them to form a generally planar fiber strip (i.e., one layer 22), then hot-pressing and curing multiple layers 22 to form the carbon fiber propulsion plate 20. In this embodiment, the carbon fiber in the traditional carbon fiber plate manufacturing method is replaced with graphene fibers 100. Graphene fibers 100 can be purchased directly from the market and have a diameter of 100-150 μm.

[0044] like Figure 8 and Figure 9As shown, in this embodiment, the propulsion plate 20 includes multiple thermosetting composite layers 22, which are made of multiple graphene-reinforced fibers 200 impregnated with adhesive resin. The graphene-reinforced fibers 200 are obtained by mixing, spinning, and carbonizing carbon fiber precursors and graphene sheets. In this embodiment, graphene is added during the conventional carbon fiber manufacturing process to achieve carbon fiber reinforcement. Specifically, taking the laboratory fabrication of graphene-reinforced fibers 200 as an example, the following method is used: First, a PAN / graphene spinning solution is prepared using 7.5g of PAN (average particle size 50μm; copolymer is 99.5% acrylonitrile (AN) and 0.5% methyl acrylate (MA) by mass percentage). The added graphene nanosheets (i.e., graphene sheets) have an average thickness of 0.8nm and an average lateral dimension of 300nm. To prevent the aggregation of graphene nanosheets, dimethyl sulfoxide (DMSO) is selected as a solvent to stabilize and disperse the graphene sheets. The added graphene concentration was 0.07–0.1% of the graphene-reinforced fiber 200 to improve dispersibility and prevent the agglomeration of graphene nanosheets in the PAN polymer. The PAN / graphene dopant solution was then heated to 60°C with continuous stirring and held for 2 hours. The solids concentration of the PAN / DMSO solution was approximately 7.5%. The PAN / graphene spinning dopant solution was extruded through a 5 μm diameter spinneret. The extruded fibers were then subjected to two solidification molding processes and one washing. With the aid of guide rollers, the solidified PAN / graphene filaments were further stretched and washed to form PAN / graphene precursor fibers. Finally, the PAN / graphene precursor fibers were heated to 250°C at a heating rate of 5°C / min, and then carbonized in an argon atmosphere furnace at 1500°C for 0.5 hours.

[0045] In this invention, the addition of graphene significantly reduces the porosity of PAN precursor fibers, thereby reducing surface and internal defects in the resulting graphene-reinforced carbon fibers, improving carbon fiber quality, and yielding high-strength graphene-reinforced carbon fibers. Its strength is 110-125% higher than that of PAN-based carbon fibers without graphene, and its modulus is increased by 84-112%. When commercially available carbon fiber pusher plates have 10 layers, the addition of graphene allows for the achievement of the original mechanical properties with only 5-7 layers, resulting in a 30-40% weight reduction for the pusher plate.

[0046] Reference Figure 10 In another embodiment of the present invention, the propulsion plate 20 includes a plurality of thermosetting composite layups 22, wherein the layups 22 are formed by a plurality of graphene-reinforced fibers 200 arranged together, and the graphene-reinforced fibers 200 are formed by a blend of carbon fiber 300 and graphene fiber 100. The layups 22 are formed in the same way as conventional carbon fiber layups.

[0047] like Figure 11 As shown, in this embodiment, the propulsion plate 20 contains at least one graphene layer 23, and the thickness of a single graphene layer 23 is no greater than 0.4 nm. In this embodiment, the graphene layer 23 is a type of graphene layer with a specific structure (sp). 2 The hybridized carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure, which can be a single-layer structure or a multi-layer structure. That is, in this invention, the propulsion plate 20 can be formed simply through this graphene layer 23.

[0048] like Figure 12 As shown, in this embodiment, the push plate 20 further includes a substrate 24, and the graphene layer 23 is laminated on the substrate 24. In this embodiment, the graphene layer 23 can be laminated to the upper surface of the substrate 24 by adhesive bonding, or to the lower surface of the substrate 24, or to be laminated within the substrate 24.

[0049] As a preferred embodiment of the present invention, the substrate 24 is a TPU board, nylon board, aramid board or carbon fiber board. These substrates 24 are commonly used materials for shoe sole propulsion plates on the market. By combining the graphene layer 23 with the substrate 24, the thickness of the substrate 24 can be reduced. The total thickness of the substrate 24 and the graphene layer 23 can be less than the thickness of the propulsion plates on the market, and achieve the same or better strength and rebound performance.

[0050] In a preferred embodiment of the present invention, the propulsion plate 20 is provided with a perforated hole 21 for weight reduction, the perforated hole 21 extending from the upper surface to the lower surface of the propulsion plate 20. In an embodiment, two perforated holes 21 are provided, one perforated hole 21 extending from the front end of the forefoot portion 101 to the front end of the midsection portion 102, and the other perforated hole 21 is provided in the heel portion 103.

[0051] In a preferred embodiment of the present invention, the sole body includes a first midsole 11 and a second midsole 12 bonded together, and a push plate 20 is disposed between the first midsole 11 and the second midsole 12. The first midsole 11, the second midsole 12, and the push plate 20 are bonded together by adhesive. The first midsole 11 and the second midsole 12 can be made of EVA or ETPU material. In another preferred embodiment of the present invention, the sole body includes a midsole and an outsole 30 bonded to the lower surface of the midsole. The push plate 20 is disposed on the upper surface or the lower surface of the midsole. The midsole can be made of EVA or ETPU, and the outsole 30 is made of rubber.

[0052] In a preferred embodiment of the present invention, the propulsion plate 20 is provided corresponding to one or more of the forefoot portion 101, midsection portion 102, and heel portion 103. In an embodiment, the propulsion plate 20 extends from the heel portion 103 to the forefoot portion 101, forming a full-length carbon fiber plate. Of course, based on the concept of the present invention, the shape of the propulsion plate 20 can be various, such as... Figures 2 to 5 It can be made into various shapes of propulsion plates 20, or other shapes of propulsion plates.

[0053] Will Figure 6 , Figure 8 , Figure 11 And ordinary carbon fiber plates on the market, when made to the same thickness (1mm), are like... Figure 2 The performance of the push plate 20 shown is compared. The test method refers to GB / T9341-2000 Test Method for Bending Properties of Plastics.

[0054]

[0055] The product form of the present invention is not limited to the embodiments described in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of the present invention.

Claims

1. A graphene propulsion plate shoe sole, comprising a shoe sole body, the shoe sole body being front in the direction corresponding to the forepart of the foot and being rear in the direction corresponding to the heel of the foot, a propulsion plate extending in the front-rear direction being embedded in the shoe sole body, characterized in that: The propelling plate is a plate body containing graphene; the propelling plate comprises a plurality of thermoset composite plies arranged by a plurality of graphene reinforced fibers, the graphene reinforced fibers are prepared by mixing, spinning and carbonization of carbon fiber precursors and graphene sheets, and are prepared in the following manner: first, 7.5g of PAN is used to prepare a PAN / graphene spinning stock solution, the added graphene nanosheets have an average thickness of 0.8 nm and an average lateral size of 300 nm, dimethyl sulfoxide is selected as the solvent, and the mass concentration of the added graphene accounts for 0.07-0.1% of the graphene reinforced fibers, then the PAN / graphene stock solution is heated to 60℃ under continuous stirring for 2 hours, the solid mass concentration of the PAN / DMSO solution is about 7.5%, the PAN / graphene spinning stock solution is extruded through a 5μm diameter spinneret, then the extruded fiber is formed into a PAN / graphene precursor fiber through two times of coagulation molding and one time of washing, and finally the PAN / graphene precursor fiber is heated to 250℃ at a heating rate of 5℃ / min, and then carbonized in an argon atmosphere furnace at 1500℃ for 0.5 hours.

2. A graphene propulsion plate shoe sole as claimed in claim 1, wherein: The thickness of the propelling plate is 0.5-1.5mm.

3. The graphene propulsion plate shoe sole of claim 1, wherein: The propelling plate contains one or more graphene layers, and the thickness of the graphene layer is not greater than 0.4nm.

4. A graphene push plate shoe sole as claimed in claim 3, wherein: The propelling plate further comprises a substrate, and the graphene layer is composite on the substrate.

5. A graphene push plate shoe sole as claimed in claim 4, wherein: The substrate is a TPU plate, a nylon plate, an aramid plate or a carbon fiber plate.

6. A graphene propulsion plate shoe sole as claimed in claim 5, wherein: The propelling plate is provided with a hollow hole for reducing weight, and the hollow hole penetrates from the upper surface to the lower surface of the propelling plate.

7. A graphene propulsion plate shoe sole according to any one of claims 1 to 6, characterized in that: The shoe sole body comprises a first insole and a second insole which are composite together, and the propelling plate is arranged between the first insole and the second insole.

8. A graphene propulsion plate shoe sole as claimed in any one of claims 1 to 6, characterized by: The shoe sole body comprises an insole and an outsole which is composite on the lower surface of the insole, and the propelling plate is arranged on the upper surface of the insole or the lower surface of the insole.

9. A graphene propulsion plate shoe sole as claimed in any one of claims 1 to 6, characterized by: The shoe sole body corresponds to the front part of the instep as the forefoot part, the heel as the heel part, and the arch as the waist part, and the propelling plate is arranged corresponding to one or more of the forefoot part, the waist part and the heel part.

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