Oil-resistant wear-resistant antistatic EVA shoe sole

Abstract

The utility model relates to the sole processing and manufacturing technical field, and the utility model discloses a kind of oil-resistant wear-resistant antistatic EVA soles, including integrally foamed EVA substrate, and the bottom surface outer surface is fixedly provided with multiple patches covering easy-wear area. One kind of patch is composite patch, and it is formed by oil-resistant wear-resistant layer and conductive layer;Conductive layer is coated in oil-resistant wear-resistant layer inside and penetrates its thickness direction, for contact with ground to dissipate static electricity;The conductive layer in composite patch is electrically connected with EVA substrate and oil-resistant wear-resistant layer. The present application is integrated in the key position of EVA substrate by the unique "sandwich type" composite patch structure, and the oil-resistant, wear-resistant, antistatic function is modularly integrated, while retaining the light and comfortable advantages of EVA, fundamentally solves its functional defects, especially suitable for special working environment with safety protection requirements.

Description

Technical Field

[0001] This utility model relates to the field of shoe sole processing and manufacturing technology, specifically an oil-resistant, wear-resistant, and antistatic EVA shoe sole. Background Technology

[0002] EVA material is widely used in shoe sole manufacturing due to its advantages such as lightweight, high elasticity, ease of processing, and low cost. However, ordinary EVA material has obvious defects: its wear resistance is generally poor, and it is easily worn on complex road surfaces; its oil resistance is poor, and it is prone to swelling, deformation, and performance degradation when in contact with grease; and as an excellent insulator, it easily accumulates static electricity, which cannot meet the safety requirements of special anti-static (ESD) working environments such as electronics manufacturing, petrochemicals, and laboratories.

[0003] Currently, although there are methods for chemically modifying EVA (such as adding functional additives), it is often difficult to simultaneously achieve multiple properties, and it may damage the excellent characteristics of EVA itself, resulting in problems such as complex processes, high costs, and short-lasting effects. For example, CN112210162A discloses an antistatic EVA composite material, but its oil resistance and wear resistance are not fundamentally improved. Therefore, there is an urgent need for a new technical solution that, through physical structure design rather than simple chemical modification, can fundamentally and synergistically solve the problems of oil resistance, wear resistance, and antistatic properties while retaining the core advantages of EVA.

[0004] In view of this, we propose an oil-resistant, wear-resistant, and antistatic EVA shoe sole. Summary of the Invention

[0005] The purpose of this invention is to provide an oil-resistant, wear-resistant, and antistatic EVA shoe sole to solve the problems mentioned in the background art.

[0006] An oil-resistant, wear-resistant, and antistatic EVA shoe sole includes a one-piece foamed EVA base. Multiple patches are fixedly disposed on the outer surface of the bottom of the EVA base, covering the wear-prone areas of the EVA base. One type of patch is a composite patch, formed by combining an oil-resistant and wear-resistant layer and a conductive layer. The conductive layer is encapsulated within the oil-resistant and wear-resistant layer and extends through its thickness direction, serving to contact the ground and dissipate static electricity. The conductive layer within the composite patch is electrically connected to the EVA base and the oil-resistant and wear-resistant layer. Another type of patch is a non-composite oil-resistant and wear-resistant patch.

[0007] Preferably, the oil-resistant and wear-resistant layer is made of oil-resistant and wear-resistant rubber material.

[0008] Preferably, the oil-resistant and wear-resistant rubber material is nitrile rubber or hydrogenated nitrile rubber.

[0009] Preferably, the conductive layer is made of rubber or thermoplastic polyurethane filled with a conductive substance.

[0010] Preferably, the patch includes a first patch group disposed in the forefoot area and a second patch group disposed in the heel area.

[0011] Preferably, the second patch group includes two independent patches: a composite patch located in the front half of the heel area and an oil-resistant and wear-resistant layer patch with a wave pattern in the rear half.

[0012] Preferably, the surface of the patch is provided with a U-shaped groove, and the gap between the bottom surface of the EVA substrate and the patch is provided with an anti-slip groove.

[0013] Beneficial effects

[0014] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a composite EVA sole with a novel structure, complete functions, and controllable cost. This sole, through a unique "functional area patch-type" physical composite structure, achieves excellent oil resistance, abrasion resistance, and antistatic properties in key areas without sacrificing the lightweight and high elasticity of EVA. Furthermore, the conductive layer is encapsulated within the abrasion-resistant layer and protected by the abrasion-resistant material. The functional lifespan of the conductive layer is synchronized with the lifespan of the abrasion-resistant layer of the sole, greatly improving product reliability. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a magnified view of a portion of the composite patch.

[0018] The labels in the diagram are as follows: 1. EVA base layer; 2. Patch; 3. Anti-slip groove; 4. U-shaped groove; 21. Oil-resistant and wear-resistant layer; 22. Conductive layer; 23. Oil-resistant and wear-resistant patch. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-3 This utility model provides a technical solution:

[0023] An oil-resistant, wear-resistant, and antistatic EVA shoe sole includes a one-piece foamed EVA base 1. Multiple patches 2 are fixedly disposed on the outer bottom surface of the EVA base 1, covering the wear-prone areas of the EVA base 1. One type of patch 2 is a composite patch, formed by combining an oil-resistant and wear-resistant layer 21 and a conductive layer 22. The conductive layer 22 is encapsulated within the oil-resistant and wear-resistant layer 21 and extends through its thickness direction, serving to dissipate static electricity through contact with the ground. The conductive layer 22 within the composite patch is electrically connected to the EVA base 1 and the oil-resistant and wear-resistant layer 21. Another type of patch 2 is a non-composite oil-resistant and wear-resistant patch 23. The oil-resistant and wear-resistant layer 21 is made of oil-resistant and wear-resistant rubber material, which is nitrile rubber or hydrogenated nitrile rubber. The conductive layer 22 is rubber or thermoplastic polyurethane filled with conductive material. The patch 2 includes a first patch group disposed in the forefoot area and a second patch group disposed in the heel area. The second patch group includes two independent patches 2, a composite patch located in the front half of the heel area and an oil-resistant and wear-resistant layer patch 23 with a wave pattern in the rear half. The surface of the patch 2 is provided with a U-shaped groove 4 and an anti-slip groove 3 is provided in the gap between the bottom surface of the EVA base 1 and the patch 2.

[0024] It should be explained that in the design of this shoe sole, a conductive layer is used to connect the static electricity generated by the EVA material and the static electricity generated by the wear-resistant material and conduct it to the ground. A composite patch structure is adopted to modularly integrate the oil-resistant and wear-resistant functions into the key parts of the EVA base. While retaining the advantages of EVA's lightweight and comfort, its functional defects are fundamentally solved.

[0025] Understandably, when a person walks, the wear-prone parts in contact with the ground are covered by patch 2. Patch 2 is made of oil-resistant and wear-resistant material. Since it will definitely be slippery in an oily environment, multiple anti-slip patterns are designed, such as U-shaped grooves 4 and anti-slip grooves 3. In addition, EVA material itself is prone to generating static electricity, and wear-resistant material will also generate static electricity due to frequent friction. Therefore, conductive material is set to penetrate the oil-resistant and wear-resistant layer 21 so that the static electricity generated by both can be guided to the ground through the conductive layer 22 to produce an anti-static effect.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An oil-resistant, wear-resistant, and antistatic EVA shoe sole, characterized in that, The system includes an integrally foamed EVA substrate (1), on which multiple patches (2) are fixedly disposed on the bottom outer surface of the EVA substrate (1). The patches (2) cover the wear-prone areas of the EVA substrate (1). One type of patch (2) is a composite patch, which is formed by combining an oil-resistant and wear-resistant layer (21) and a conductive layer (22). The conductive layer (22) is encapsulated inside the oil-resistant and wear-resistant layer (21) and extends through its thickness direction for contact with the ground to dissipate static electricity. The conductive layer (22) in the composite patch is electrically connected to the EVA substrate (1) and the oil-resistant and wear-resistant layer (21). Another type of patch (2) is a non-composite oil-resistant and wear-resistant patch (23).

2. The oil-resistant, wear-resistant, and antistatic EVA shoe sole according to claim 1, characterized in that, The oil-resistant and wear-resistant layer (21) is made of oil-resistant and wear-resistant rubber material.

3. The oil-resistant, wear-resistant, and antistatic EVA shoe sole according to claim 2, characterized in that, The oil-resistant and wear-resistant rubber material is nitrile rubber or hydrogenated nitrile rubber.

4. The oil-resistant, wear-resistant, and antistatic EVA shoe sole according to claim 1, characterized in that, The conductive layer (22) is made of rubber or thermoplastic polyurethane filled with conductive material.

5. The oil-resistant, wear-resistant, and antistatic EVA shoe sole according to claim 1, characterized in that, The patch (2) includes a first patch group disposed in the forefoot area and a second patch group disposed in the heel area.

6. The oil-resistant, wear-resistant, and antistatic EVA shoe sole according to claim 5, characterized in that, The second patch group includes two independent patches (2), a composite patch located in the front half of the heel area and an oil-resistant and wear-resistant patch (23) with a wave pattern in the rear half.

7. The oil-resistant, wear-resistant, and antistatic EVA shoe sole according to claim 1, characterized in that, The surface of the patch (2) is provided with a U-shaped groove (4) and the gap between the bottom surface of the EVA substrate (1) and the patch (2) is provided with an anti-slip groove (3).

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