Halogen-free flame-retardant ultraviolet-proof EVA (Ethylene Vinyl Acetate) adhesive film and explosion-proof glass applying same

Abstract

The utility model relates to the technical field of explosion-proof glass, in particular to a halogen-free flame-retardant ultraviolet-proof EVA (Ethylene Vinyl Acetate) adhesive film and explosion-proof glass applying the same, the EVA adhesive film comprises a composite adhesive layer I, a transparent rubber layer I, an ultraviolet absorption layer I, a flame-retardant enhancement layer, an ultraviolet absorption layer II, a transparent rubber layer II and a composite adhesive layer II which are sequentially adhered; transmission of ultraviolet light in external light can be reduced, and the concentration of the ultraviolet light is reduced; an efficient flame-retardant effect can be achieved in a fire disaster, and toxic and harmful gas is not released; structures such as raised plastic balls which easily cause generation of gaps are not adopted, so that the overall strength of the EVA adhesive film can be improved, and the situation that the flame-retardant effect is weakened due to air stored in the film can be avoided; according to the explosion-proof glass applying the EVA adhesive film, after the glass is impacted by external force, fragments are adhered by the adhesive film and are prevented from splashing down to hurt visitors and exhibition cultural relics, and meanwhile, the explosion-proof glass can play ultraviolet-proof and good flame-retardant roles.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof glass, in particular to a halogen-free flame-retardant and ultraviolet-proof EVA adhesive film and an explosion-proof glass using the same. Background Art

[0002] Explosion-proof glass has extremely high strength and is often used in exhibitions of various cultural relics. Generally, adhesive films can be added between multiple glass substrates to form glass plates. When the explosion-proof glass breaks, the fragments are bonded and do not fall off, which plays a good protective role. However, in the event of a fire, the adhesive film is easy to burn, causing the explosion-proof glass plate to disintegrate and lose its protective function.

[0003] The flame retardant materials in the existing flame retardant panels use halogen-containing flame retardant materials, such as the flame retardant film disclosed in patent CN 216337401U, which adopts a two-layer composite film, two transparent adhesive layers and a plastic ball reinforced flame retardant sheet design, and has a certain flame retardant effect, but the flame retardant film has some defects.

[0004] For example: halogen-containing flame retardant materials will release toxic and harmful gases into the environment during a fire, causing secondary damage to people in the fire; the flame retardant layer of the film adopts a raised plastic ball reinforced flame retardant layer and an elastic strip design. This design leaves a certain amount of air in the film, which is not conducive to the flame retardant performance of the film; the film cannot reduce ultraviolet rays in external light to protect cultural relics from radiation damage.

[0005] Therefore, a halogen-free flame-retardant and UV-proof EVA film and an explosion-proof glass using the same are proposed. Utility Model Content

[0006] The utility model aims to provide a halogen-free, flame-retardant and UV-proof EVA film and explosion-proof glass using the same, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a halogen-free flame-retardant and UV-proof EVA adhesive film, comprising a composite adhesive layer 1, a transparent rubber layer 1, a UV-absorbing layer 1, a flame-retardant reinforcement layer, a UV-absorbing layer 2, a transparent rubber layer 2 and a composite adhesive layer 2 which are bonded in sequence;

[0008] The first composite adhesive layer and the second composite adhesive layer both include an organic silicon flame retardant layer, an EVA layer and a stearic acid coating;

[0009] The organic silicon flame retardant layer and the stearic acid coating are respectively arranged on the upper and lower sides of the EVA layer, the stearic acid coating of the composite adhesive layer 1 is bonded to the transparent rubber layer 1, and the stearic acid coating of the composite adhesive layer 2 is bonded to the transparent rubber layer 2.

[0010] According to the above technical solution, the material of the first ultraviolet absorbing layer is phenyl salicylate, and the material of the second ultraviolet absorbing layer is benzotriazole.

[0011] According to the above technical solution, the material of the flame retardant reinforcement layer is a cross-linked EVA resin reinforced and modified by nano-silicon dioxide.

[0012] According to the above technical solution, the transparent rubber layer 1 and the transparent rubber layer 2 have the same structure and thickness.

[0013] According to the above technical solution, the structure and thickness of the first ultraviolet absorbing layer and the second ultraviolet absorbing layer are the same.

[0014] An explosion-proof glass using a halogen-free flame-retardant and UV-proof EVA film comprises explosion-proof glass and an EVA film. The explosion-proof glass is provided with two layers. The EVA film is fixed between the two layers of the explosion-proof glass. The EVA film is the above-mentioned EVA film.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a halogen-free flame-retardant and UV-proof EVA film, which can reduce the penetration of ultraviolet light in external light and reduce the concentration of ultraviolet light; can play a highly effective flame-retardant role in fires and does not release toxic and harmful gases; does not use structures that easily cause gaps, such as raised plastic balls, so that the overall strength of the EVA film can be improved while preventing the air in the film from weakening the flame-retardant effect;

[0016] The explosion-proof glass using the EVA film can prevent the fragments from splashing and injuring visitors and exhibits after the glass is impacted by external force, and at the same time it can play a role in UV protection and good flame retardancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the halogen-free, flame-retardant, and UV-resistant EVA film;

[0019] Figure 2 It is a schematic diagram of the structure of explosion-proof glass using halogen-free flame-retardant and UV-proof EVA film.

[0020] In the figure: 1. Composite adhesive layer 1; 2. Transparent rubber layer 1; 3. UV absorption layer 1; 4. Flame retardant reinforcement layer; 5. UV absorption layer 2; 6. Transparent rubber layer 2; 7. Composite adhesive layer 2; 8. Explosion-proof glass; 9. EVA film; 10. Silicone flame retardant layer; 11. EVA layer; 12. Stearic acid coating. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 , a halogen-free flame-retardant and UV-proof EVA adhesive film, comprising a composite adhesive layer 1, a transparent rubber layer 2, a UV-absorbing layer 3, a flame-retardant reinforcing layer 4, a UV-absorbing layer 5, a transparent rubber layer 6 and a composite adhesive layer 7 which are bonded in sequence;

[0023] The composite adhesive layer 1 and the composite adhesive layer 2 7 both include an organic silicon flame retardant layer 10, an EVA layer 11 and a stearic acid coating 12;

[0024] The organic silicon flame retardant layer 10 and the stearic acid coating 12 are respectively arranged on the upper and lower sides of the EVA layer 11, the stearic acid coating 12 of the composite adhesive layer 1 is bonded to the transparent rubber layer 2, and the stearic acid coating 12 of the composite adhesive layer 27 is bonded to the transparent rubber layer 26. The melting point of the stearic acid coating 12 is relatively low. When the EVA film is burned by flames in a fire, the stearic acid coating 12 can melt and absorb part of the heat, delaying the time when the EVA film is damaged as a whole, and improving the flame retardant effect of the EVA film; the organic silicon flame retardant layer 10 decomposes into a substance similar to a ceramic layer structure when subjected to a fire. Such a ceramic layer structure can hinder the transfer of heat, isolate the penetration of air, delay the thermal damage and combustion of the EVA layer 11, and improve the flame retardant effect of the EVA film.

[0025] The material of the UV absorbing layer 1 3 is phenyl salicylate, and the material of the UV absorbing layer 2 5 is benzotriazole. Two UV absorbing layers with different materials are designed to minimize the transmittance and intensity of UV rays without affecting the light transmittance, thereby protecting cultural relics from damage by UV light.

[0026] The material of the flame retardant reinforcement layer 4 is a cross-linked EVA resin reinforced and modified by nano-silicon dioxide. It does not use structures such as raised plastic balls that are easy to cause voids. It can improve the overall strength of the EVA film while avoiding the presence of air in the film that weakens the flame retardant effect. The nano-silicon dioxide in the flame retardant reinforcement layer 4 can migrate to the surface of the carbonized layer during a fire, making the carbonized layer more compact and stable, hindering the transfer of heat and the diffusion of oxygen, delaying the damage of the composite adhesive layer to the high temperature environment, and improving the overall flame retardant properties of the EVA film. In addition, the flame retardant reinforcement layer 4 also plays a role in enhancing the strength and tear resistance of the overall film.

[0027] The transparent rubber layer 1 2 and the transparent rubber layer 2 6 have the same structure and thickness.

[0028] The structure and thickness of the UV absorbing layer 1 3 and the UV absorbing layer 2 5 are the same.

[0029] See also Figure 2 An explosion-proof glass using a halogen-free flame-retardant and UV-proof EVA film comprises an explosion-proof glass 8 and an EVA film 9. The explosion-proof glass 8 is provided with two layers. The EVA film 9 is fixed between the two layers of explosion-proof glass 8 to play a fixing and buffering role. The EVA film 9 is the above-mentioned EVA film.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A halogen-free flame-retardant and UV-proof EVA film, characterized in that: It comprises a composite adhesive layer 1, a transparent rubber layer 1, a UV absorbing layer 1, a flame retardant reinforcement layer, a UV absorbing layer 2, a transparent rubber layer 2 and a composite adhesive layer 2 which are bonded in sequence; The first composite adhesive layer and the second composite adhesive layer both include an organic silicon flame retardant layer, an EVA layer and a stearic acid coating; The organic silicon flame retardant layer and the stearic acid coating are respectively arranged on the upper and lower sides of the EVA layer, the stearic acid coating of the composite adhesive layer 1 is bonded to the transparent rubber layer 1, and the stearic acid coating of the composite adhesive layer 2 is bonded to the transparent rubber layer 2.

2. The halogen-free flame-retardant and UV-proof EVA film according to claim 1, characterized in that: The material of the first ultraviolet absorbing layer is phenyl salicylate, and the material of the second ultraviolet absorbing layer is benzotriazole.

3. The halogen-free flame-retardant and UV-proof EVA film according to claim 1, characterized in that: The material of the flame retardant reinforcement layer is cross-linked EVA resin reinforced and modified by nano-silicon dioxide.

4. The halogen-free flame-retardant and UV-proof EVA film according to claim 1, characterized in that: The transparent rubber layer 1 and the transparent rubber layer 2 have the same structure and thickness.

5. The halogen-free flame-retardant and UV-proof EVA film according to claim 1, characterized in that: The structure and thickness of the first ultraviolet absorbing layer and the second ultraviolet absorbing layer are the same.

6. An explosion-proof glass using a halogen-free flame-retardant and UV-proof EVA film, comprising explosion-proof glass and an EVA film, wherein the explosion-proof glass is provided with two layers, and the EVA film is fixed between the two layers of the explosion-proof glass, characterized in that: The EVA film is the EVA film described in any one of claims 1 to 5.

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