EVA (Ethylene Vinyl Acetate) foam sheet

Abstract

The utility model relates to an EVA (Ethylene Vinyl Acetate) foam sheet which comprises a wear-resistant layer, a flame-retardant layer, a heat-conducting layer, an elastic foam layer, a bonding layer and a release film, the wear-resistant layer is compounded at the upper end of the flame-retardant layer, the heat-conducting layer is compounded at the lower end of the flame-retardant layer, the elastic foam layer is compounded at the lower end of the heat-conducting layer, the bonding layer is coated at the lower end of the elastic foam layer, and the release film is coated at the lower end of the elastic foam layer. The release film covers the lower end of the bonding layer, the elastic foam layer comprises glass fiber cloth and elastic EVA foam structures, the two elastic EVA foam structures abut against each other, and the glass fiber cloth covers the outer surfaces of the two elastic EVA foam structures. According to the EVA foam sheet, the wear-resistant layer is made of a rubber material and has wear resistance and anti-static performance, the flame-retardant layer is made of an environment-friendly flame-retardant material and particularly adopts a nanoscale magnesium hydroxide flame retardant, so that the flame-retardant effect is achieved, the heat-conducting layer is made of a heat-conducting silica gel material, and the elastic foam layer has high elasticity and good rebound resilience and can effectively achieve shock absorption; therefore, the electronic equipment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of foam, in particular to an EVA foam sheet. Background Art

[0002] Foam is a material made by foaming plastic particles. It is divided into PU foam, anti-static foam, conductive foam, EPE, anti-static EPE, CR, EVA, cross-linked PE, SBR, EPDM, etc. Foam has a series of advantages such as light weight, fast pressure-sensitive fixation, ease of use, flexible bending, ultra-thin volume, and reliable performance. Among them, EVA foam is widely used in electronics, hardware, toys, clothing, lamps, decoration, medical equipment, automobiles and other fields. However, the cushioning effect of existing EVA foam is not ideal and cannot achieve the goal of effective shock absorption. Utility Model Content

[0003] The main purpose of the utility model is to provide an EVA foam sheet to solve the above technical problems and improve the shock absorption performance of the foam.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An EVA foam sheet includes a wear-resistant layer, a flame retardant layer, a heat-conducting layer, an elastic foam layer, an adhesive layer and a release film, wherein the wear-resistant layer is compounded on the upper end of the flame retardant layer, the heat-conducting layer is compounded on the lower end of the flame retardant layer, the elastic foam layer is compounded on the lower end of the heat-conducting layer, the adhesive layer is coated on the lower end of the elastic foam layer, the release film is coated on the lower end of the adhesive layer, the elastic foam layer includes glass fiber cloth and an elastic EVA foam structure, two elastic EVA foam structures abut each other, and the glass fiber cloth is coated on the outer surfaces of the two elastic EVA foam structures.

[0006] As a preferred technical solution, the elastic EVA foam structure includes a fixed portion and an elastic portion, the elastic portion is fixed to the outer surface of the fixed portion in an orderly manner, and the elastic portions of the two elastic EVA foam structures abut against each other.

[0007] As a preferred technical solution, the elastic portion is semi-cylindrical in shape.

[0008] As a preferred technical solution, the elastic EVA foam structure further includes a soft rubber tube, which is installed in the gap between the two elastic parts and abuts against the elastic parts.

[0009] As a preferred technical solution, the wear-resistant layer is provided with convex patterns, and the convex patterns are arranged obliquely and equidistantly at the upper end of the wear-resistant layer.

[0010] As a preferred technical solution, the wear-resistant layer is also provided with a splicing structure, which includes a splicing protrusion and a splicing groove. The splicing protrusion and the splicing groove are respectively arranged at both ends of the wear-resistant layer, and the shape of the splicing protrusion matches the shape of the splicing groove.

[0011] As a preferred technical solution, the end of the splicing protrusion is provided with a bevel.

[0012] As a preferred technical solution, the lower end of the splicing protrusion and the upper end of the splicing groove are respectively provided with Velcro.

[0013] The beneficial effects of the present invention are: the wear-resistant layer of the above-mentioned EVA foam sheet is made of rubber material, which has wear resistance and anti-static properties; the flame retardant layer adopts environmentally friendly flame retardant material, specifically nano-magnesium hydroxide flame retardant, thereby achieving flame retardant effect; the heat conductive layer adopts heat conductive silicone material; the elastic foam layer has high elasticity and good rebound performance, which can effectively achieve shock absorption, thereby protecting electronic equipment; the glass fiber cloth can keep the first elastic EVA foam structure, the second elastic EVA foam structure and the soft rubber tube in abutment state, thereby increasing the longitudinal compression resistance and shockproof performance of the foam, and avoiding the above-mentioned structure from being loose and affecting the shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of the EVA foam sheet involved in the present utility model;

[0015] Figure 2 This is a top view of the EVA foam sheet involved in the present utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] like Figure 1As shown, an EVA foam sheet includes a wear-resistant layer 1, a flame retardant layer 2, a thermal conductive layer 3, an elastic foam layer 4, an adhesive layer 5 and a release film 6. The wear-resistant layer 1 is compounded on the upper end of the flame retardant layer 2, the thermal conductive layer 3 is compounded on the lower end of the flame retardant layer 2, the elastic foam layer 4 is compounded on the lower end of the thermal conductive layer 3, the adhesive layer 5 is coated on the lower end of the elastic foam layer 4, and the release film 6 is coated on the lower end of the adhesive layer 5. The wear-resistant layer 1 is a rubber material, which not only has wear resistance but also anti-static performance. The flame retardant layer 2 adopts an environmentally friendly flame retardant material, specifically a nano-magnesium hydroxide flame retardant, to achieve a flame retardant effect. The thermal conductive layer 3 adopts a thermal conductive silicone material. The elastic foam layer 4 has high elasticity and good resilience, and can effectively achieve shock absorption, thereby protecting electronic equipment. The adhesive layer 5 adopts acrylic adhesive and can be firmly adhered to electronic components.

[0018] Please combine Figure 1 and Figure 2 As shown, the wear-resistant layer 1 is provided with convex grooves 11, which are arranged obliquely and equidistantly at the upper end of the wear-resistant layer 1. While improving the wear-resistant effect, it can also reduce the folding resilience and strengthen the structural strength of the wear-resistant layer 1 to prevent the wear-resistant layer 1 from being damaged. The wear-resistant layer 1 is also provided with a splicing structure, which includes a splicing protrusion 13 and a splicing groove 12. The splicing protrusion 13 and the splicing groove 12 are respectively provided at the two ends of the wear-resistant layer 1. The shape of the splicing protrusion 13 matches the shape of the splicing groove 12, so that the two EVA foam sheets can be spliced ​​together, thereby expanding the protection range of the EVA foam sheet for electronic components. The end of the splicing protrusion 13 is provided with a bevel, which can guide the splicing protrusion 13 to quickly splice into the splicing groove 12, thereby improving the splicing efficiency and eliminating the need for precise alignment by the operator. Velcro 14 is provided at the lower end of the splicing protrusion 13 and the upper end of the splicing groove 12 respectively to prevent the splicing protrusion 13 and the splicing groove 12 from separating after splicing.

[0019] Please continue to refer to Figure 1As shown, the elastic foam layer 4 includes a glass fiber cloth 41, a first elastic EVA foam structure 42, a second elastic EVA foam structure 43 and a soft rubber tube 44. The first elastic EVA foam structure 42 and the second elastic EVA foam structure 43 abut against each other, the glass fiber cloth 41 is coated on the outer surface of the first elastic EVA foam structure 42 and the second elastic EVA foam structure 43, and the soft rubber tube 44 is installed between the first elastic EVA foam structure 42 and the second elastic EVA foam structure 43. When the foam is compressed, The first elastic EVA foam structure 42 and the second elastic EVA foam structure 43 are compressed and bent, causing the soft rubber tube 44 to be compressed and deformed, thereby increasing the longitudinal compression resistance and shockproof performance of the foam. The glass fiber cloth 41 wraps and fixes the first elastic EVA foam structure 42, the second elastic EVA foam structure 43 and the soft rubber tube 44, which can maintain the first elastic EVA foam structure 42, the second elastic EVA foam structure 43 and the soft rubber tube 44 in abutment state, thereby avoiding the above-mentioned structure from becoming loose and affecting the shock absorption effect. The first elastic EVA foam structure 42 and the second elastic EVA foam structure 43 have the same structure. In this embodiment, the first elastic EVA foam structure 42 is taken as an example for explanation, and the structure of the second elastic EVA foam structure 43 is not repeated. The first elastic EVA foam structure 42 includes a fixed portion 421 and an elastic portion 422. The elastic portion 422 is fixed in order on the outer surface of the fixed portion 421. The elastic portions 421 of the first elastic EVA foam structure 42 and the second elastic EVA foam structure 43 abut against each other. The shape of the elastic portion 421 is semi-cylindrical. The soft rubber tube 44 is installed in the gap between the two elastic portions 421 and abuts against the elastic portion 421, thereby ensuring the shock-absorbing effect of the elastic foam layer.

[0020] The beneficial effects of the present invention are: the above-mentioned EVA foam sheet, the wear-resistant layer 1 is a rubber material, which not only has wear-resistant performance, but also has anti-static performance. The flame retardant layer 2 adopts an environmentally friendly flame retardant material, specifically a nano-magnesium hydroxide flame retardant, thereby achieving a flame retardant effect. The heat-conducting layer 3 adopts a heat-conducting silicone material. The elastic foam layer 4 has high elasticity and good resilience, and can effectively achieve shock absorption, thereby protecting electronic equipment. The glass fiber cloth 41 wraps and fixes the first elastic EVA foam structure 42, the second elastic EVA foam structure 43 and the soft rubber tube 44, and can keep the first elastic EVA foam structure 42, the second elastic EVA foam structure 43 and the soft rubber tube 44 in abutment state, thereby increasing the longitudinal compression resistance and shockproof performance of the foam, and avoiding the above-mentioned structure from being loose and affecting the shock absorption effect.

[0021] The above-described embodiments are merely preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features, and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. An EVA foam sheet, characterized in that: It includes a wear-resistant layer, a flame retardant layer, a heat-conducting layer, an elastic foam layer, an adhesive layer and a release film. The wear-resistant layer is compounded on the upper end of the flame retardant layer, the heat-conducting layer is compounded on the lower end of the flame retardant layer, the elastic foam layer is compounded on the lower end of the heat-conducting layer, the adhesive layer is coated on the lower end of the elastic foam layer, the release film is coated on the lower end of the adhesive layer, the elastic foam layer includes glass fiber cloth and elastic EVA foam structure, two elastic EVA foam structures abut each other, and the glass fiber cloth is coated on the outer surfaces of the two elastic EVA foam structures.

2. The EVA foam sheet according to claim 1, characterized in that The elastic EVA foam structure includes a fixing portion and an elastic portion. The elastic portion is fixed to the outer surface of the fixing portion in an orderly manner. The elastic portions of the two elastic EVA foam structures abut against each other.

3. The EVA foam sheet according to claim 2, characterized in that: The elastic portion is in a semi-cylindrical shape.

4. The EVA foam sheet according to claim 3, characterized in that The elastic EVA foam structure further includes a soft rubber tube, which is installed in the gap between the two elastic parts and abuts against the elastic parts.

5. The EVA foam sheet according to claim 4, characterized in that: The wear-resistant layer is provided with convex patterns, and the convex patterns are arranged obliquely and equidistantly at the upper end of the wear-resistant layer.

6. The EVA foam sheet according to claim 5, characterized in that: The wear-resistant layer is further provided with a splicing structure, which includes a splicing protrusion and a splicing groove. The splicing protrusion and the splicing groove are respectively provided at two ends of the wear-resistant layer, and the shape of the splicing protrusion matches the shape of the splicing groove.

7. The EVA foam sheet according to claim 6, characterized in that: The end of the splicing protrusion is provided with a slope.

8. The EVA foam sheet according to claim 7, characterized in that: The lower end of the splicing protrusion and the upper end of the splicing groove are respectively provided with Velcro.

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