EVA (Ethylene Vinyl Acetate) plate

Abstract

The utility model provides an EVA (Ethylene Vinyl Acetate) board, which relates to the technical field of foam boards and comprises an outer layer, a functional layer, a buffer layer and a bottom layer, a plurality of circular truncated cones are arranged on one side of the outer layer, a plurality of groups of circular rings are arranged on the other side of the outer layer, a wave layer is arranged between the functional layer and the outer layer, the buffer layer is arranged between the functional layer and the bottom layer, and a honeycomb-shaped grating is arranged on the surface of the buffer layer. The EVA plate has the beneficial effects that through the collaborative design of each layer, the problems of non-uniform force dispersion, insufficient comfort and the like in the prior art are solved, and the performance and the use experience of the EVA plate are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to foamed board technical field especially relates to a kind of EVA board. BACKGROUND

[0002] EVA board as an important material, is widely used in insole, sports equipment, packaging material and other fields, its main advantage lies in good elasticity, cushioning, lightweight and wear resistance.EVA board of existing usually through multilayer structure to meet different functional requirements, wherein the structure combination between outer layer, functional layer, buffer layer and bottom layer directly influences its mechanical properties, comfort and durability.However, traditional EVA board is often limited to simple multilayer superposition structure in design, unable to give full play to the synergistic effect between layers, and the effect is limited in buffering and force dispersion.

[0003] The outer layer and functional layer of EVA board on the market usually adopt plane structure, lack reasonable form design to optimize pressure dispersion, and the buffer layer also adopts uniform foam layer, although it can provide certain buffering effect, but the satisfaction of complex mechanical requirement is not complete, in addition, existing EVA board lacks effective mechanical dispersion structure, such as setting reasonable shape protrusion or recess structure in outer layer, thereby affecting the service life and comfort of material, although the existing technology improves air permeability by increasing micropore design, but the optimization effect on mechanical properties is still relatively limited.

[0004] How to solve the above technical problems is the subject faced by the utility model. INVENTION CONTENTS

[0005] In order to solve the deficiency of prior art, the utility model provides an EVA board, which is designed by cooperation of each layer, overcomes uneven force dispersion and insufficient comfort in prior art, and improves the performance and use experience of EVA board.

[0006] The utility model solves the technical problems by adopting the technical scheme that the utility model provides an EVA board, which comprises an outer layer, a functional layer, a buffer layer and a bottom layer, the outer layer is provided with a plurality of circular tables on one side and a plurality of groups of circular rings on the other side.

[0007] The functional layer is provided with a wave layer between the outer layer, the buffer layer is provided between the functional layer and the bottom layer, and the surface of the buffer layer is provided with a honeycomb-shaped grid.

[0008] The thickness of the bottom layer is 2-4mm.

[0009] The thickness of the buffer layer is 3-6mm, and the surface connected with the functional layer and the bottom layer is provided with the grid.

[0010] The grid thickness is 1-2.5mm.

[0011] The functional layer is connected with the buffer layer on one side, and the other side is provided with the wave layer, and the wave height of the wave layer is 1.5-3mm.

[0012] The thickness of the functional layer is 3-5mm.

[0013] The outer layer is connected with the wave layer of the functional layer on one side, and the other side of the outer layer connected with the wave layer is provided with the circular ring;

[0014] Each group of the circular ring comprises a plurality of concentric circular ring protrusions, and the circular ring protrusions are located in the wave trough.

[0015] The opposite side of the circular ring surface of the outer layer is provided with the circular table, and the top edge of the circular table is provided with a circular arc shape.

[0016] The center of the cross section of the circular table and the center of the circular ring are located on the same vertical axis.

[0017] The thickness of the circular table is 0.5-1mm.

[0018] The thickness of the outer layer is 2-3mm.

[0019] The thickness of the circular ring is 0.5-1mm.

[0020] The functional layer is provided with a plurality of micropores, and the micropores are uniformly distributed on each surface of the functional layer.

[0021] The diameter of the micropore is 0.4-0.8mm.

[0022] The outer layer, the functional layer, the buffer layer and the adjacent layer of the bottom layer are hot-pressed and bonded.

[0023] The beneficial effects of the utility model are:

[0024] The EVA plate fully considers the mechanical properties and comfort in the design of each layer, and effectively solves the defects in the prior art through the synergistic effect between the layers. The plane design of the bottom layer is simple and firm, provides stable support, and has a moderate thickness, so that the whole plate has good load-bearing capacity. The buffer layer in contact with it enhances the buffering effect through the honeycomb grid structure, and reasonably disperses the external impact force through the thickness of the grid, avoids the single absorption mode of the traditional buffer layer to the impact force, and greatly improves the overall comfort and durability.

[0025] The functional layer adopts a wave-shaped structure, and is closely matched with the buffer layer and the outer layer, and the wave peak and valley structure provided by the wave layer effectively disperses and absorbs the pressure applied from outside. The wave height of the wave layer and the circular ring protrusion of the outer layer form a shock absorption cavity, the circular ring protrusion of the outer layer is located in the wave valley of the wave layer, and the force dispersion function of the plate is effectively improved, at the same time, the micropore design of the functional layer enhances the air permeability, facilitates the pressure relief of the shock absorption cavity, and improves the comfort, and avoids the moisture accumulation problem caused by lack of air permeability in the traditional design;

[0026] The outer layer is designed to have a combination structure of a circular truncated cone and a circular ring, which can effectively enhance the impact resistance of the plate, and is closely combined with the wave-shaped structure of the functional layer, and further optimizes the force dispersion effect, the circular truncated cone design forms a buffer effect on the opposite surfaces, reduces the direct influence of external pressure on the internal layer structure, and the layers are closely connected through hot pressing adhesion, so that the stability and durability of the material are ensured, the top surface edge of the circular truncated cone is designed to be arc-shaped, which can effectively match the external pressure source and disperse the impact force, the center of the cross section of the circular truncated cone and the center of the circular ring are located on the same vertical axis, which can uniformly transmit the force to ensure stability, each group of circular rings is composed of a plurality of concentric circular protrusions, which further enhances the force dispersion capacity, when external pressure acts on the outer layer, the design of the plurality of concentric circles can transmit the force layer by layer in a decreasing manner, reduce local stress concentration, so that the pressure can be uniformly distributed to the entire plate surface, avoiding excessive compression or damage of local areas, and the performance and use experience of the EVA plate are improved through the cooperative design of the layers. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a front view of the utility model.

[0028] Figure 2 It is a three-dimensional structure explosion schematic of the utility model Figure One .

[0029] Figure 3 It is a three-dimensional structure explosion schematic of the utility model Figure Two .

[0030] Among them, the reference sign is: 1, the outer layer;101, the circular truncated cone;102, the circular ring;2, the functional layer;201, the wave layer;3, the buffer layer;301, the grid;4, the bottom layer. DETAILED DESCRIPTION

[0031] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through specific embodiments.

[0032] Referring to Figures 1 to 3As shown, the embodiment is an EVA plate, comprising an outer layer 1, a functional layer 2, a buffer layer 3 and a bottom layer 4, the outer layer 1, the functional layer 2, the buffer layer 3 and the bottom layer 4 are hot-pressed and bonded between adjacent layers, and the thickness of the bottom layer 4 is 3mm.

[0033] The buffer layer 3 is arranged between the functional layer 2 and the bottom layer 4, the surface of the buffer layer 3 is provided with a honeycomb-shaped grid 301, the thickness of the buffer layer 3 is 4mm, the surface of the buffer layer 3 is provided with the grid 301, and the thickness of the grid 301 is 1.5mm.

[0034] The wave layer 201 is arranged between the functional layer 2 and the outer layer 1, one surface of the functional layer 2 is a plane, and the other surface is provided with the wave layer 201, the wave height of the wave layer 201 is 2mm, the thickness of the functional layer 2 is 4mm, the functional layer 2 is provided with a plurality of micropores, and the micropores are uniformly distributed on each surface of the functional layer 2, and the diameter of the micropores is 0.5mm.

[0035] One surface of the outer layer 1 is provided with a plurality of circular platforms 101, and the other surface is provided with a plurality of groups of circular rings 102, one surface of the outer layer 1 is connected with the wave peak of the wave layer 201 of the functional layer 2, and the surface of the outer layer 1 connected with the wave layer 201 is provided with the circular ring 102, the thickness of the circular ring 102 is 0.8mm, each group of circular rings 102 comprises a plurality of concentric circular ring protrusions, and the circular ring protrusions are located in the wave trough of the wave layer 201, the opposite surface of the outer layer 1 provided with the circular ring 102 is provided with the circular platform 101, the top surface edge of the circular platform 101 is arc-shaped, the center of the cross section of the circular platform 101 and the center of the circular ring 102 are located on the same vertical axis, the thickness of the circular platform 101 is 0.9mm, and the thickness of the outer layer 1 is 3mm.

[0036] The technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here, of course, the above description is not a limitation of the utility model, the utility model is also not limited to the above examples, the changes, modifications, additions or replacements made by ordinary technical personnel in the technical field within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. An EVA sheet, characterized by, It comprises an outer layer (1), a functional layer (2), a buffer layer (3) and a bottom layer (4), the outer layer (1) is provided with a plurality of circular platforms (101) on one side, and is provided with a plurality of circular rings (102) on the other side; The functional layer (2) is provided with a wave layer (201) between the outer layer (1), the buffer layer (3) is provided between the functional layer (2) and the bottom layer (4), and the surface of the buffer layer (3) is provided with a honeycomb grid (301).

2. The EVA sheet according to claim 1, characterized by The thickness of the bottom layer (4) is 2-4mm.

3. The EVA sheet according to claim 1, characterized by The thickness of the buffer layer (3) is 3-6mm, and the surface of the functional layer (2) and the bottom layer (4) is provided with the grid (301); The thickness of the grid (301) is 1-2.5mm.

4. The EVA sheet according to claim 1, characterized by The surface of the functional layer (2) and the buffer layer (3) is a plane, and the surface of the functional layer (2) and the buffer layer (3) is provided with the wave layer (201), and the wave height of the wave layer (201) is 1.5-3mm.

5. The EVA sheet according to claim 1, characterized in that, The thickness of the functional layer (2) is 3-5mm.

6. The EVA sheet according to claim 1, characterized by The surface of the outer layer (1) and the wave layer (201) of the functional layer (2) is connected at the peak of the wave layer (201), and the surface of the outer layer (1) and the wave layer (201) is provided with the circular ring (102); Each group of the circular ring (102) comprises a plurality of concentric circular ring protrusions, and the circular ring protrusions are located in the wave trough of the wave layer (201).

7. The EVA sheet according to claim 6, characterized in that, The opposite surface of the outer layer (1) provided with the circular ring (102) is provided with the circular platform (101), and the edge of the top surface of the circular platform (101) is provided with a circular arc; The center of the cross section of the circular platform (101) and the center of the circular ring (102) are located on the same vertical axis; The thickness of the circular platform (101) is 0.5-1mm.

8. The EVA sheet according to claim 1, characterized by The thickness of the outer layer (1) is 2-3mm; The thickness of the circular ring (102) is 0.5-1mm.

9. The EVA sheet according to claim 1, characterized by The functional layer (2) is provided with a plurality of micropores, and the micropores are uniformly distributed on each surface of the functional layer (2); The diameter of the micropore is 0.4-0.8mm.

10. The EVA sheet according to claim 1, characterized in that, The outer layer (1), the functional layer (2), the buffer layer (3) and the bottom layer (4) are hot-pressed and bonded between adjacent layers.

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