Anti-skid and wear-resistant EVA shoe sole

Abstract

The utility model relates to the technical field of shoe sole, a kind of anti-skid wear-resistant EVA shoe sole, including shoe sole, shoe sole is composed of inner rubber layer, EVA base layer and outer rubber layer three parts, and from top to bottom sequentially arranged, the top of EVA base layer and the bottom of inner rubber layer are all concave surface type design, and EVA base layer and inner rubber layer are compounded with upper three-dimensional braided fiber web by first glue layer, the utility model forms three-dimensional anchoring structure by three-dimensional braided fiber web and concave surface type design EVA base layer, rubber layer, cooperate kevlar / TPU mixed weaving glue layer, significantly enhance interlaminar bond strength, reduce particle drop rate;Gradual change anti-skid groove design optimization contact friction efficiency, avoid vicious cycle of "anti-skid-wear-more slippery";Concave surface type interface design expands bonding area, cooperate high-strength fiber web, improve overall wear resistance and anti-peeling performance, ensure that anti-skid performance is stable in long-term use, meet the core demand of long-term durable outdoor shoes.

Description

Technical Field

[0001] This utility model relates to the field of shoe sole technology, and in particular to a non-slip and wear-resistant EVA shoe sole. Background Technology

[0002] EVA soles are made of ethylene-vinyl acetate copolymer, which is lightweight, elastic, and water-resistant. With its low density and high resilience, it provides good cushioning and is suitable for sports shoes, casual shoes, etc. The hardness and thickness can be adjusted through foaming process to enhance slip resistance and wear resistance. It is widely used in everyday footwear and professional sports equipment, taking into account both comfort and functionality, and is one of the mainstream choices in the footwear material industry.

[0003] To achieve anti-slip effects, existing EVA shoe soles often use anti-slip particle spraying or coating, such as silicone particles or ceramic microparticles. This can easily lead to interface bonding defects. For example, an outdoor shoe brand once used a spraying process to add diamond particles, which initially had excellent anti-slip performance. However, after a 300-kilometer wear test, the particle shedding rate exceeded 40%, causing a sharp drop in anti-slip performance. At the same time, the coating peeled off from the substrate, causing the wear-resistant layer to fail, forming a vicious cycle of "anti-slip - wear - more slippery", which cannot meet the needs of long-term use. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution: a non-slip and wear-resistant EVA shoe sole, comprising a shoe sole, wherein the shoe sole is composed of three parts: an inner rubber layer, an EVA base layer, and an outer rubber layer, arranged sequentially from top to bottom; The top of the EVA base layer and the bottom of the inner rubber layer are both concave. The EVA base layer and the inner rubber layer are bonded together by a first adhesive layer with an upper three-dimensional woven fiber mesh. The bottom of the EVA base layer and the top of the outer rubber layer are both concave. A three-dimensional woven fiber mesh is bonded between the EVA base layer and the outer rubber layer through a second adhesive layer. Both the upper three-dimensional woven fiber mesh and the lower three-dimensional woven fiber mesh are made of Kevlar fiber and thermoplastic polyurethane mixed at a mass ratio of 1:3 to form a three-dimensional cross anchoring structure. The bottom of the outer rubber layer is provided with anti-slip grooves of varying depth.

[0005] As an improvement to the above technical solution, the anti-slip groove includes a longitudinal groove in the heel area and a transverse groove in the forefoot area, and the bottom of the groove has an arc-shaped transition structure.

[0006] As an improvement to the above technical solution, the anti-slip groove is coated with a nano-scale silica wear-resistant coating. The coating is prepared by the sol-gel method, and the coating and the rubber substrate are chemically bonded by a silane coupling agent.

[0007] As an improvement to the above technical solution, both the first adhesive layer and the second adhesive layer are polyurethane hot melt adhesives, and glass microspheres with a diameter of 50-100μm are uniformly distributed in the adhesive layer.

[0008] The beneficial effects of this invention are as follows: A three-dimensional anchoring structure is formed by the three-dimensional woven fiber mesh, the concave EVA base layer, and the rubber layer. Combined with the Kevlar / TPU blended adhesive layer, this significantly enhances the interlayer bonding strength and reduces particle shedding rate. The gradient anti-slip groove design optimizes contact friction efficiency, avoiding the vicious cycle of "anti-slip - wear - more slippery." The concave interface design expands the bonding area, and combined with the high-strength fiber mesh, it improves overall wear resistance and peel resistance, ensuring stable anti-slip performance during long-term use and meeting the core requirement of long-term durability for outdoor shoes. Attached Figure Description

[0009] Figure 1 This is a front view of the EVA shoe sole of this utility model; Figure 2 This is a cross-sectional view of the internal structure of this utility model; Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0010] Reference numerals: 1. Sole; 2. EVA base layer; 3. Inner rubber layer; 4. Outer rubber layer; 5. Upper three-dimensional woven fiber mesh; 51. First adhesive layer; 52. Lower three-dimensional woven fiber mesh; 53. Second adhesive layer; 6. Anti-slip groove; 61. Longitudinal groove; 62. Transverse groove. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0012] Reference Appendix Figure 1 ,exist Figure 1 In the diagram, 'a' points to the front view and 'b' points to the right-side view. These views are only used to understand the scheme.

[0013] Please see Figure 1-3 This utility model provides a technical solution: a non-slip and wear-resistant EVA shoe sole, including a shoe sole 1, which is composed of three parts: an inner rubber layer 3, an EVA base layer 2, and an outer rubber layer 4, arranged in order from top to bottom; The top of the EVA base layer 2 and the bottom of the inner rubber layer 3 are both concave. The EVA base layer 2 and the inner rubber layer 3 are bonded together by the first adhesive layer 51 with an upper three-dimensional woven fiber mesh 5. The bottom of the EVA base layer 2 and the top of the outer rubber layer 4 are both concave. A lower three-dimensional woven fiber mesh 52 is bonded between the EVA base layer 2 and the outer rubber layer 4 through a second adhesive layer 53. Both the upper three-dimensional woven fiber mesh 5 and the lower three-dimensional woven fiber mesh 52 are made of Kevlar fiber and thermoplastic polyurethane mixed at a mass ratio of 1:3 to form a three-dimensional cross anchoring structure. The bottom of the outer rubber layer 4 is provided with anti-slip grooves 6 with varying depths.

[0014] In this implementation scheme, a three-dimensional anchoring structure is formed by a three-dimensional woven fiber mesh, a concave EVA base layer 2, and a rubber layer. Combined with a Kevlar / TPU hybrid adhesive layer, the interlayer bonding strength is significantly enhanced, and the particle shedding rate is reduced. The gradient anti-slip groove design optimizes contact friction efficiency and avoids the vicious cycle of "anti-slip-wear-more slippery". The concave interface design expands the bonding area, and combined with a high-strength fiber mesh, it improves the overall wear resistance and peel resistance, ensuring stable anti-slip performance during long-term use and meeting the core requirement of long-term durability for outdoor shoes.

[0015] The upper / lower three-dimensional woven fiber mesh uses Kevlar fibers and thermoplastic polyurethane mixed at a 1:3 mass ratio to form a three-dimensional cross-network. Kevlar fibers provide mechanical anchoring points, while TPU serves as the matrix to fill the gaps. Together, they synergistically enhance interlayer shear strength and peel resistance. The concave interface design increases the actual bonding area by approximately 30%-50%, and combined with the three-dimensional interweaving of the fiber mesh, the interlayer bonding force is increased to more than twice that of traditional flat interfaces, effectively inhibiting particle shedding and coating peeling.

[0016] Specifically, the anti-slip groove 6 includes a longitudinal groove 61 in the heel area and a transverse groove 62 in the forefoot area, and the bottom of the groove has an arc-shaped transition structure.

[0017] In this embodiment, the longitudinal and transverse grooves are designed to adapt to the stress characteristics of different areas of the foot. The longitudinal grooves enhance the grip of the heel area, while the transverse grooves improve the lateral anti-slip performance of the forefoot area. The arc-shaped transition groove bottom reduces stress concentration, delays crack formation, and extends the service life of the anti-slip grooves.

[0018] Specifically, the anti-slip groove 6 has a groove wall coated with a nano-sized silica wear-resistant coating. The coating is prepared by the sol-gel method, and the coating and the rubber substrate are chemically bonded by a silane coupling agent.

[0019] In this embodiment, the nano-scale silica coating is uniformly deposited by the sol-gel method to improve the wear resistance of the tank wall; the chemical bonding of the silane coupling agent strengthens the adhesion between the coating and the rubber substrate, prevents the coating from peeling off, and maintains the durability of the anti-slip performance.

[0020] Specifically, both the first adhesive layer 51 and the second adhesive layer 53 are polyurethane hot melt adhesives, and glass microspheres with a diameter of 50-100μm are uniformly distributed in the adhesive layer.

[0021] In this embodiment, the polyurethane hot melt adhesive provides high-strength bonding and heat resistance; the uniform distribution of 50-100μm glass microspheres enhances the impact resistance and abrasion resistance of the adhesive layer, reduces adhesive layer wear, and adjusts the hardness of the adhesive layer to optimize wearing comfort and durability.

[0022] The 50-100μm glass microspheres uniformly distributed in the polyurethane hot melt adhesive reduce stress concentration inside the adhesive layer through the "ball effect" and adjust the hardness of the adhesive layer to Shore A55-65, balancing abrasion resistance and wearing comfort. The surface of the microspheres is treated with silane to form a chemical bond with the adhesive layer, preventing the microspheres from falling off and improving the impact resistance by 25%, effectively resisting the impact of foreign objects such as stones.

[0023] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A non-slip and wear-resistant EVA shoe sole, comprising a sole (1), wherein the sole (1) is composed of three parts: an inner rubber layer (3), an EVA base layer (2), and an outer rubber layer (4), arranged sequentially from top to bottom, characterized in that: The top of the EVA base layer (2) and the bottom of the inner rubber layer (3) are both concave. The EVA base layer (2) and the inner rubber layer (3) are bonded together by a first adhesive layer (51) with an upper three-dimensional woven fiber mesh (5). The bottom of the EVA base layer (2) and the top of the outer rubber layer (4) are both concave. The EVA base layer (2) and the outer rubber layer (4) are bonded together by a second adhesive layer (53) with a lower three-dimensional woven fiber mesh (52). The upper three-dimensional woven fiber mesh (5) and the lower three-dimensional woven fiber mesh (52) are both made of Kevlar fiber and thermoplastic polyurethane mixed in a mass ratio of 1:3 to form a three-dimensional cross anchoring structure. The bottom of the outer rubber layer (4) is provided with anti-slip grooves (6) with varying depths.

2. The anti-slip and wear-resistant EVA sole according to claim 1, characterized in that: The anti-slip groove (6) includes a longitudinal groove (61) in the heel area and a transverse groove (62) in the forefoot area, and the bottom of the groove has an arc-shaped transition structure.

3. The anti-slip and wear-resistant EVA sole according to claim 1, characterized in that: The anti-slip groove (6) has a groove wall coated with a nano-sized silica wear-resistant coating. The coating is prepared by the sol-gel method, and the coating and the rubber substrate are chemically bonded by a silane coupling agent.

4. The anti-slip and wear-resistant EVA shoe sole according to claim 1, characterized in that: The first adhesive layer (51) and the second adhesive layer (53) are both polyurethane hot melt adhesives, and glass microspheres with a diameter of 50-100μm are uniformly distributed in the adhesive layer.

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