Waterproof breathable device, preparation method thereof and shoe sole

Abstract

The invention relates to a waterproof breathable device and a preparation method thereof and a sole, the waterproof breathable device comprises waterproof breathable cloth, an adhesive layer and a bottom plate which are stacked in sequence, the adhesive layer and the bottom plate are both provided with breathable areas corresponding to each other, the waterproof breathable cloth is provided with a plurality of through holes, all the through holes are aligned to the non-breathable area of the bottom plate, and the bottom plate is provided with a waterproof layer. The bottom plate is connected with waterproof breathable cloth through an adhesive layer, a plurality of breathable grids are arranged in the breathable area, breathable channels are arranged among the breathable grids, and the breathable channels are circular, linear or polygonal; the sole comprises a midsole upper layer, a midsole lower layer and a waterproof breathable device; comprising the following steps: preparing a carbon fiber bottom plate, performing laser drilling, and performing mold closing and hot press molding. The breathable waterproof cloth disclosed by the invention is subjected to laser drilling treatment, so that the fitting firmness of the hot melt adhesive, the waterproof cloth and TPU is remarkably enhanced, shoe parts have excellent waterproofness and breathability, and the durability and the use experience of products are improved.

Description

Technical Field

[0001] This invention relates to the field of shoe sole component manufacturing technology, and in particular to a waterproof and breathable device, its manufacturing method, and a shoe sole. Background Technology

[0002] In the fabrication of waterproof and breathable structures for footwear, reliable bonding between waterproof and breathable fabric and plastic components is crucial for ensuring product performance. Traditional techniques suffer from insufficient bonding stability between the waterproof and breathable fabric and hot melt adhesive, resulting in poor interfacial adhesion and a tendency to peel or detach, severely impacting the product's structural integrity and lifespan. Furthermore, current processing techniques lack targeted heat insulation during high-temperature molding, leaving critical areas of the waterproof and breathable fabric susceptible to direct high-temperature effects. This leads to thermal deformation of the fiber structure and failure of the waterproof coating, disrupting the original breathability pathways and significantly weakening waterproof performance, making it difficult to achieve synergistic optimization of waterproofness and breathability. These issues directly result in poor performance, inconsistent quality, and insufficient durability of waterproof and breathable footwear components, severely impacting the consumer experience and limiting the market competitiveness of related products, becoming a critical technical challenge that the industry urgently needs to address. Summary of the Invention

[0003] This invention provides a waterproof and breathable device and shoe sole to overcome the problems of poor adhesion and poor waterproof performance of existing waterproof and breathable accessories.

[0004] The present invention adopts the following technical solution: A waterproof and breathable device includes a waterproof and breathable fabric, an adhesive layer, and a base plate stacked sequentially. The adhesive layer and the base plate each have corresponding breathable areas. The waterproof and breathable fabric has multiple through holes, all of which are aligned with the non-breathable areas of the base plate. The base plate is connected to the waterproof and breathable fabric through the adhesive layer. Multiple breathable grids are provided in the breathable areas, and breathable channels are provided between the breathable grids. The breathable channels are circular, linear, or polygonal.

[0005] Furthermore, the aforementioned adhesive layer is a hot melt adhesive film or an epoxy resin film.

[0006] Furthermore, the aforementioned base plate is made of carbon fiber sheet, TPU material sheet, or nylon material sheet.

[0007] Furthermore, the diameter of the aforementioned circular hole is 0.5-3mm.

[0008] Furthermore, the aforementioned ventilation grille has an inclined plate structure, with an inclination angle of 45°-60°, preferably 45°.

[0009] A shoe sole includes an upper midsole, a lower midsole, and the aforementioned waterproof and breathable device. The lower midsole has an open-top receiving groove, in which the waterproof and breathable device is adapted to be placed. The bottom wall of the receiving groove has convection holes corresponding to the breathable area. The upper midsole has an installation hole, in which a breathable accessory is fitted. The breathable accessory has a crystalline breathable structure.

[0010] Furthermore, the materials of the aforementioned upper and lower midsole layers are both supercritical materials, popcorn ETPU, or MD materials.

[0011] A method for preparing a waterproof and breathable device includes the following steps: S1: Place the carbon fiber material into the cavity of the lower mold of mold A, close the upper mold of mold A, heat the cavity of mold A until the carbon fiber material in the cavity is injection molded, and open the mold after cooling to room temperature to obtain the carbon fiber base plate. S2: Multiple through holes are processed on the waterproof and breathable fabric using laser equipment, with all through holes aligned with the non-breathable area of ​​the base plate; S3: Using mold B, both the upper and lower molds of mold B are provided with grooves aligned with the above-mentioned breathable area 31. A heat insulation block is inserted into the groove 50. The waterproof and breathable fabric after the perforation process in S2 is hung in the mold cavity of the upper mold of mold B. The carbon fiber base plate obtained in S1 is placed in the mold cavity of the lower mold of mold B. A punched epoxy resin film is placed on the carbon fiber plate or epoxy resin glue is brushed on the area of ​​the carbon fiber plate to be fixed. After the mold is closed, it is heated and hot-pressed into one piece. After cooling, the mold is opened to obtain the waterproof and breathable device.

[0012] Furthermore, the aforementioned heat insulation block is one of aerogel, silicone, or EVA.

[0013] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: 1. This invention employs an integrated process of heating and molding waterproof and breathable fabric and carbon fiber plate within a mold. Combined with the pre-designed through-hole structure on the waterproof and breathable fabric, it provides a "channel-like" penetration path for the adhesive material, allowing the adhesive layer to fully wet the interface and form an "anchored" bonding structure. This significantly enhances the interfacial bonding force between the waterproof and breathable fabric and the carbon fiber plate, effectively solving the problems of weak adhesion and easy peeling in traditional technologies. Compared to traditional structures, the bonding strength is increased by more than 30%, significantly extending the product's service life.

[0014] 2. This invention addresses the problem of high-temperature processing damaging waterproof and breathable fabrics. This application incorporates heat-insulating blocks at the locations corresponding to the breathable areas of the mold. These heat-insulating blocks clamp the waterproof and breathable fabric, aligning it with key areas of the breathable zone, thus constructing a directional heat-insulating and protective structure. This design precisely blocks high-temperature conduction, preventing fiber deformation and coating failure in the breathable areas of the waterproof and breathable fabric due to heating. It preserves the original structure and performance of the waterproof and breathable fabric to the maximum extent, ensuring unobstructed ventilation and long-lasting waterproofing. This achieves synergistic optimization of waterproofing and breathability, completely solving the industry problem of traditional products being "waterproof but not breathable, breathable but not waterproof."

[0015] 3. The integrated mold heating and forming process of this invention, combined with a targeted heat insulation design, can accurately control key parameters such as temperature and pressure during the processing, effectively avoiding product performance differences caused by uneven bonding and high-temperature damage in traditional processing. This significantly improves the consistency of product quality in mass production, provides a reliable guarantee for large-scale production, and further enhances the market competitiveness of the products.

[0016] 4. Thanks to its robust adhesive structure and stable waterproof and breathable performance, this invention significantly improves the overall durability of the product, extending its service life by more than 50%. Simultaneously, the stable ventilation pathways allow for continuous air convection between the inside and outside of the shoe, keeping the inside dry. Combined with reliable waterproofing, this greatly optimizes the consumer's wearing experience and enhances the overall value of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the waterproof and breathable device of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the adhesive layer structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the waterproof and breathable fabric of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the base plate of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the bottom layer of the present invention.

[0022] Figure 6 This is a schematic diagram of the waterproof and breathable device and the sub-layer of the present invention. Figure 1 .

[0023] Figure 7 This is a schematic diagram of the structure of the midsole of the present invention. Figure 1 .

[0024] Figure 8This is a schematic cross-sectional view of the midsole structure of the present invention. Figure 1 .

[0025] Figure 9 This is a schematic diagram of the structure of the midsole of the present invention. Figure 2 .

[0026] Figure 10 This is a schematic diagram of the structure of the waterproof and breathable device of the present invention. Figure 2 .

[0027] Figure 11 This is a side view of the waterproof and breathable device of the present invention. Figure 2 .

[0028] Figure 12 This is a schematic diagram of the structure of the midsole of the present invention. Figure 3 .

[0029] Figure 13 This is a schematic cross-sectional view of the midsole structure of the present invention. Figure 3 .

[0030] Figure 14 This is a schematic diagram of the adhesive layer and the waterproof and breathable fabric of the present invention.

[0031] Figure 15 This is a schematic diagram of the structure of mold A of the present invention.

[0032] Figure 16 This is a schematic diagram of the structure of mold B of the present invention.

[0033] Figure 17 This is a schematic diagram of the structure of the lower mold of mold B in this invention.

[0034] The components are as follows: 1. Adhesive layer; 2. Waterproof and breathable fabric; 3. Base plate; 4. Mold A; 5. Mold B; 6. Midsole; 20. Through hole; 30. Breathable channel; 31. Breathable area; 32. Breathable grid; 41. Upper mold of mold A; 42. Lower mold of mold A; 50. Groove; 51. Upper mold of mold B; 52. Lower mold of mold B; 53. Heat insulation block; 61. Lower layer of midsole; 62. Upper layer of midsole; 610. Receiving groove; 611. Convection hole; 620. Mounting hole; 621. Breathable accessories. Detailed Implementation

[0035] The specific embodiments of the present invention will now be described with reference to the accompanying drawings. Example

[0036] Reference Figures 1-4A waterproof and breathable device includes a waterproof and breathable fabric 2, an adhesive layer 1, and a base plate 3 stacked sequentially. Both the adhesive layer 1 and the base plate 3 have corresponding breathable areas 31. The waterproof and breathable fabric 2 has multiple through holes 20, all of which are aligned with the non-breathable areas of the base plate 3. The base plate 3 is connected to the waterproof and breathable fabric 2 via the adhesive layer 1. Multiple breathable grilles 32 are provided within each breathable area 31, and breathable channels 30 are provided between the grilles 32. These breathable channels 30 are circular, linear, or polygonal, preferably linear.

[0037] Reference Figures 1-4 The adhesive layer 1 is a hot melt adhesive film or an epoxy resin film. Preferably, the adhesive layer 1 is a hot melt adhesive film. The hot melt adhesive film melts when heated in the mold cavity and overflows from the waterproof and breathable fabric 2 after melting, so that the material of the adhesive layer 1 can fully wet the interface and form an "anchored" bonding structure, which greatly enhances the interfacial bonding force between the waterproof and breathable fabric 2 and the carbon fiber plate.

[0038] The aforementioned base plate 3 is made of carbon fiber sheet, TPU material sheet, or nylon material sheet, preferably carbon fiber sheet.

[0039] The diameter of the aforementioned circular hole is 0.5-3mm, preferably 2mm.

[0040] Reference Figure 4 , Figure 11 The aforementioned ventilation grille 32 is an inclined plate structure, and the inclination angle of the ventilation grille 32 is 45°-60°, preferably 45°.

[0041] Reference Figures 5-8 A shoe sole includes an upper midsole layer 62, a lower midsole layer 61, and the aforementioned waterproof and breathable device. The upper midsole layer 62 and the lower midsole layer 61 are combined to form a midsole 6. The lower midsole layer 61 has an open-top receiving groove 610. The waterproof and breathable device is adapted to be placed in the receiving groove 610. The bottom wall of the receiving groove 610 is provided with convection holes 611 corresponding to the breathable area 31.

[0042] Reference Figure 7 , Figure 8 The upper layer 62 of the midsole has mounting holes 620, and a breathable component 621 is fitted inside the mounting holes 620. The breathable component 621 has a crystalline breathable structure. (Refer to...) Figure 7 The upper layer of the midsole can also be provided with holes corresponding to the ventilation zone.

[0043] The materials of the upper midsole layer 62 and the lower midsole layer 61 are both supercritical materials, popcorn ETPU, or MD materials. Preferably, the upper midsole layer 62 is made of supercritical materials and the lower midsole layer 61 is made of ETPU materials.

[0044] Reference Figures 14-17 A method for preparing a waterproof and breathable device includes the following steps: S1: Place the carbon fiber material into the cavity of the lower mold 42 of mold A, close the upper mold 41 of mold A, heat the cavity of mold A 4 until the carbon fiber material in the cavity is injection molded, and open the mold after cooling to room temperature to obtain the carbon fiber base plate 3. S2: Multiple through holes 20 are processed on the waterproof and breathable fabric 2 using laser equipment, and all through holes 20 are aligned with the non-breathable area of ​​the base plate 3; S3: Using mold B 5, both the upper mold 51 and the lower mold 52 of mold B are provided with grooves 50 aligned with the above-mentioned ventilated area 31. A heat insulation block 53 is inserted into the groove 50. The heat insulation block 53 is columnar. The waterproof and breathable cloth 2 after being perforated in S2 is hung in the mold cavity of the upper mold 51 of mold B. The carbon fiber base plate 3 obtained in S1 is placed in the mold cavity of the lower mold 52 of mold B. A punched epoxy resin film is placed on the carbon fiber plate or epoxy resin glue is brushed on the area of ​​the carbon fiber plate to be fixed. The mold is closed. The heat insulation block 53 of the upper mold 51 of mold B presses down on the part of the waterproof and breathable cloth 2 aligned with the above-mentioned ventilated area 31. The lower mold 52 of mold B pushes upward on the ventilated area 31 of the carbon fiber base plate 3. The mold is heated and hot-pressed into one piece. After cooling, the mold is opened to obtain the waterproof and breathable device.

[0045] The aforementioned heat insulation block 53 is one of aerogel, silicone, or EVA, with silicone being the preferred material. Example

[0046] Reference Figures 1-4 A waterproof and breathable device includes a waterproof and breathable fabric 2, an adhesive layer 1, and a base plate 3 stacked sequentially. The adhesive layer 1 and the base plate 3 are each provided with corresponding breathable areas 31. The waterproof and breathable fabric 2 is provided with multiple through holes 20, all of which are aligned with the non-breathable areas of the base plate 3. The base plate 3 is connected to the waterproof and breathable fabric 2 through the adhesive layer 1. Multiple breathable grids 32 are provided in the breathable areas 31, and breathable channels 30 are provided between the breathable grids 32. The breathable channels 30 are circular, linear, or polygonal.

[0047] Reference Figures 10-13 The aforementioned adhesive layer 1 is a hot melt adhesive film or an epoxy resin film. In this embodiment, epoxy resin adhesive is applied to the non-breathable area of ​​the carbon fiber plate. The periphery of the breathable area 31 and the periphery of the carbon fiber plate have raised edges, which prevent the epoxy resin adhesive from overflowing. The midsole is integrally molded, and the upper surface of the midsole has an installation groove for a waterproof and breathable device. The waterproof and breathable device is placed in the installation groove, resulting in good waterproof and breathable performance.

[0048] The aforementioned base plate 3 is made of carbon fiber sheet, TPU material sheet, or nylon material sheet, preferably carbon fiber sheet.

[0049] The diameter of the aforementioned circular hole is 0.5-3 mm, preferably 1 mm.

[0050] Reference Figure 4 , Figure 11 The aforementioned ventilation grille 32 is an inclined plate structure, and the inclination angle of the ventilation grille 32 is 45°-60°, preferably 45°.

[0051] Reference Figure 5 , Figure 6 and Figure 9 A shoe sole includes an upper midsole layer 62, a lower midsole layer 61, and the aforementioned waterproof and breathable device. The lower midsole layer 61 has an open-top receiving groove 610, in which the waterproof and breathable device is adapted to be placed. The bottom wall of the receiving groove 610 has convection holes 611 corresponding to the breathable area 31.

[0052] The materials of the upper midsole layer 62 and the lower midsole layer 61 are both supercritical materials, popcorn ETPU, or MD materials. Preferably, the upper midsole layer 62 is made of supercritical materials and the lower midsole layer 61 is made of MD materials.

[0053] Reference Figures 14-17 A method for preparing a waterproof and breathable device includes the following steps: S1: Place the carbon fiber material into the cavity of the lower mold 42 of mold A, close the upper mold 41 of mold A, heat the cavity of mold A 4 until the carbon fiber material in the cavity is injection molded, and open the mold after cooling to room temperature to obtain the carbon fiber base plate 3. S2: Multiple through holes 20 are processed on the waterproof and breathable fabric 2 using laser equipment, and all through holes 20 are aligned with the non-breathable area of ​​the base plate 3; S3: Using mold B 5, both the upper mold 51 and the lower mold 52 of mold B are provided with grooves 50 aligned with the above-mentioned breathable area 31. Heat insulation blocks 53 are inserted into the grooves 50. The waterproof and breathable cloth 2 after being perforated in S2 is hung in the mold cavity of the upper mold 51 of mold B. The carbon fiber base plate 3 obtained in S1 is placed in the mold cavity of the lower mold 52 of mold B. A punched epoxy resin film is placed on the carbon fiber plate or epoxy resin glue is brushed on the area of ​​the carbon fiber plate to be fixed. After the mold is closed, it is heated and hot-pressed into one piece. After cooling, the mold is opened to obtain the waterproof and breathable device.

[0054] The aforementioned heat insulation block 53 is one of aerogel, silicone, or EVA, preferably silicone.

[0055] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A waterproof and breathable device, characterized in that: It includes a waterproof and breathable fabric, an adhesive layer, and a base plate stacked in sequence. The adhesive layer and the base plate are each provided with corresponding breathable areas. The waterproof and breathable fabric has multiple through holes, all of which are aligned with the non-breathable areas of the base plate. The base plate is connected to the waterproof and breathable fabric through the adhesive layer. Multiple breathable grids are provided in the breathable areas, and breathable channels are provided between the breathable grids. These breathable channels are circular, linear, or polygonal.

2. The waterproof and breathable device as described in claim 1, characterized in that: The adhesive layer is a hot melt adhesive film or an epoxy resin film.

3. The waterproof and breathable device as described in claim 1, characterized in that: The base plate is made of carbon fiber sheet, TPU material sheet, or nylon material sheet.

4. The waterproof and breathable device as described in claim 1, characterized in that: The diameter of the through hole is 0.5-3mm.

5. The waterproof and breathable device as described in claim 1, characterized in that: The ventilation grille has an inclined plate structure with an inclination angle of 45°-60°.

6. A shoe sole, characterized in that: The device includes an upper midsole layer, a lower midsole layer, and a waterproof and breathable device as described in any one of claims 1-5. The lower midsole layer has an open-top receiving groove, and the waterproof and breathable device is adapted to be placed in the receiving groove. The bottom wall of the receiving groove has convection holes corresponding to the breathable area. The upper midsole layer has an installation hole, and a breathable accessory is assembled in the installation hole. The breathable accessory has a crystalline breathable structure.

7. A shoe sole as described in claim 6, characterized in that: The upper and lower layers of the midsole are both made of supercritical materials, popcorn ETPU, or MD materials.

8. A method for preparing a waterproof and breathable device, used to prepare the waterproof and breathable device as described in claim 1, characterized in that, Includes the following steps: S1: Place the carbon fiber material into the cavity of the lower mold of mold A, close the upper mold of mold A, heat the cavity of mold A until the carbon fiber material in the cavity is injection molded, and open the mold after cooling to room temperature to obtain the carbon fiber base plate. S2: Multiple through holes are processed on the waterproof and breathable fabric using laser equipment, with all through holes aligned with the non-breathable area of ​​the base plate; S3: Using mold B, both the upper and lower molds of mold B are provided with grooves aligned with the above-mentioned breathable area. Heat insulation blocks are inserted into the grooves. The waterproof and breathable fabric after the perforation process in S2 is hung in the mold cavity of the upper mold of mold B. The carbon fiber base plate obtained in S1 is placed in the mold cavity of the lower mold of mold B. A punched epoxy resin film is placed on the carbon fiber plate or epoxy resin glue is brushed on the area of ​​the carbon fiber plate to be fixed. After the mold is closed, it is heated and hot-pressed into one piece. After cooling, the mold is opened to obtain the waterproof and breathable device.

9. The method for preparing a waterproof and breathable device as described in claim 8, characterized in that: The heat insulation block is one of aerogel, silicone, or EVA.

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