Flame-retardant reflective film

Abstract

The utility model discloses a flame-retardant reflective film, which belongs to the technical field of films and sequentially comprises a surface waiting layer, a mould pressing layer, a supporting layer, a covering layer, a pressure-sensitive adhesive layer and a release layer, a plurality of prisms are formed on one side, facing the supporting layer, of the mould pressing layer in an array mode, and metal reflective layers are arranged on the prisms. The mould pressing layer is provided with a penetrating opening penetrating through the mould pressing layer and the prism, the supporting layer extends to form a supporting column which penetrates through the penetrating opening and is connected with the surface waiting layer, and a flame-retardant block which is heated to release flame-retardant gas is arranged in the supporting column. According to the flame-retardant reflective film disclosed by the utility model, combined water is released outwards from the interior of the reflective film when the reflective film combusts, so that flame combustion is hindered, and the reflective film has a flame-retardant effect.

Description

Technical Field

[0001] The utility model relates to the technical field of thin films, and more specifically, to a flame-retardant reflective film. Background Art

[0002] A reflective film is a type of thin film with the effect of reflecting light and is used in fields such as clothing, luggage, and transportation.

[0003] The utility model Chinese patent with the publication number CN218287051U introduces an OPP seamless laser cold transfer film, specifically related to the technical field of transfer films, including a base film. A silica gel film is adhesively bonded to the top of the base film, an antibacterial layer is adhesively bonded to the top of the silica gel film, a tensile layer is adhesively bonded to the top of the silica gel film, a high-temperature resistant layer is adhesively bonded to the top of the tensile layer, a flame-retardant layer is adhesively bonded to the top of the high-temperature resistant layer, and a waterproof layer is adhesively bonded to the top of the flame-retardant layer.

[0004] The problems solved in the above solution, through the design of a rotatable tensioning device, the fiberglass film has good insulation and strong heat resistance, which can improve the heat insulation effect of the base film. When the magnesium hydroxide flame retardant decomposes upon heating, it releases bound water to play a flame-retardant role, thereby extending the service life of the entire OPP seamless laser cold transfer film.

[0005] However, the flame-retardant layer is located in the middle of the transfer film, and the flame-retardant layer cannot receive heat well. After generating bound water when heated, due to the lack of a structure for the bound water to flow, the bound water cannot flow to the outside in time for flame retardancy, resulting in the transfer film needing to burn for a period of time to produce a flame-retardant effect.

[0006] This application provides another technical solution to solve this technical problem. Utility Model Content

[0007] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a flame-retardant reflective film.

[0008] The above technical purpose of the present utility model is achieved through the following technical solutions:

[0009] A flame-retardant reflective film successively includes a primer layer, an embossing layer, a support layer, a covering layer, a pressure-sensitive adhesive layer, and a release layer. A plurality of prisms are arrayed on one side of the embossing layer facing the support layer, a metal reflective layer is provided on the prisms, a through-hole penetrating the embossing layer and the prisms is formed in the embossing layer, a support column extending through the through-hole and connected to the primer layer is provided on the support layer, and a flame-retardant block that releases flame-retardant gas upon heating is provided inside the support column.

[0010] The present utility model is further provided as: The support column is provided with a connection groove, the connection groove is filled with a flame-retardant block, and the flame-retardant block is connected to the primer layer.

[0011] The utility model is further configured as follows: a clearance groove connected with a plurality of connection grooves is formed on the side of the support layer facing the covering layer, the clearance groove is filled with a flame retardant block, and the flame retardant block is connected to the shielding layer.

[0012] The utility model is further configured as follows: an air layer is formed between the molded layer and the support layer and at a position corresponding to the metal reflective layer.

[0013] The utility model is further configured that: the flame retardant block is made of magnesium hydroxide flame retardant.

[0014] The utility model is further configured as follows: the surface layer is made of TPU material.

[0015] In summary, the utility model has the following beneficial effects:

[0016] When the surface layer is damaged by fire, the flame retardant blocks will come into direct contact with the fire. The magnesium hydroxide flame retardant releases bound water when heated, producing a self-extinguishing effect, making the reflective film flame retardant.

[0017] When the air layer is heated, the volume of the internal gas increases, which will cause a backlog on the supporting layer, making it easy for the released bound water to flow out to the outside, thereby improving the flame retardant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] In the figure: 1. Surface layer; 2. Molded layer; 3. Support layer; 4. Covering layer; 5. Pressure-sensitive adhesive layer; 6. Release layer; 7. Prism; 8. Metal reflective layer; 9. Connecting groove; 10. Give way groove; 11. Through-hole; 12. Support column; 13. Flame retardant block; 14. Air layer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments.

[0021] like Figure 1As shown in the figure, the present application provides a flame-retardant reflective film, which successively includes a primer layer 1, an embossing layer 2, a support layer 3, a covering layer 4, a pressure-sensitive adhesive layer 5, and a release layer 6. The primer layer 1 is made of TPU material. The TPU material incorporates inorganic or organic flame-retardant elements, such as some units containing phosphorus, nitrogen, boron, aluminum, magnesium, and halogens, so that the TPU has the effects of wear resistance, waterproofness, and flame retardancy, increasing the service life of the reflective film.

[0022] As Figure 1 shown in the figure, the embossing layer 2 is formed by curing TPU resin. The TPU resin is cured in a mold. Using the shape of the mold, a number of prisms 7 are formed in an array on the side of the embossing layer 2 facing the support layer 3. And the side of the embossing layer 2 where the prisms 7 are formed will undergo evaporation treatment, so that a metal reflective layer 8 will adhere to the surface of the prisms 7. The metal reflective layer 8 is connected to the support layer 3. When light irradiates the reflective film, the light will pass through the primer layer 1 and the embossing layer 2 and irradiate on the metal reflective layer 8. Using the reflective effect of the metal reflective layer 8 and the inclined surface of the prisms 7, the light will be reflected, making the reflective film have a reflective effect.

[0023] As Figure 1 shown in the figure, after the formation of the embossing layer 2, the prisms 7, and the metal reflective layer 8, a laser drilling machine is used to process them, so that the embossing layer 2 is provided with through-holes 11 that penetrate the embossing layer 2 and the prisms 7. There is no metal reflective layer 8 at the position of the through-holes 11. In subsequent processing, a part of the support layer 3 will extend into the through-holes 11 to form support columns 12, and the support columns 12 will be connected to the primer layer 1.

[0024] As Figure 1 shown in the figure, a connecting groove 9 is formed at one end of the support column 12 facing the primer layer 1, and a relief groove 10 communicating with a number of connecting grooves 9 is formed on the side of the support layer 3 facing the covering layer 4. Flame-retardant blocks 13 are filled in both the relief groove 10 and the communicating groove. The flame-retardant blocks 13 are connected to the primer layer 1 and the covering layer 4. The flame-retardant blocks 13 are made of magnesium hydroxide flame retardant. After the reflective film comes into contact with fire, the primer layer 1 is damaged due to combustion by the fire. The flame-retardant blocks 13 will directly contact the fire, causing the temperature of the flame-retardant blocks 13 to increase. The magnesium hydroxide flame retardant has the effect of releasing combined water when heated. The combined water will hinder the combustion of the flame, resulting in a self-extinguishing effect, and thus making the reflective film have a flame-retardant effect.

[0025] As Figure 1 shown in the figure, supported by the prisms 7, an air layer 14 is formed between the metal reflective layer 8 and the support layer 3. After the reflective film comes into contact with fire, the gas inside the air layer 14 will expand due to heat, increasing the volume of the gas. This will cause pressure on the support layer 3 and squeeze the flame retardant located in the relief groove 10, making the combined water released by the flame retardant flow out to the outside more easily due to the pressure, increasing the combined water for hindering the combustion of the flame, and further improving the flame-retardant effect.

[0026] In summary, for the reflective film provided in this embodiment, combustion will cause the combined water inside the reflective film to be released from the inside to the outside, hindering the combustion of the flame, so that the reflective film has a flame retardant effect.

[0027] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A flame-retardant reflective film, sequentially comprising a primer layer, a molded layer, a support layer, a covering layer, a pressure-sensitive adhesive layer and a release layer, characterized in that: On one side of the molding layer facing the support layer, a number of prisms are formed in an array. A metal reflective layer is provided on the prisms. The molding layer is provided with a through hole penetrating the molding layer and the prisms. The support layer extends a support column passing through the through hole and connecting with the waiting surface layer. A flame retardant block for releasing flame retardant gas when heated is arranged in the support column.

2. The flame-retardant reflective film according to claim 1, wherein: The support column is provided with a connecting groove, and the connecting groove is filled with a flame retardant block, and the flame retardant block is connected with the waiting surface layer.

3. A flame-retardant reflective film according to claim 2, characterized in that: On one side of the support layer facing the covering layer, a relief groove communicating with a number of connecting grooves is formed, and the relief groove is filled with a flame retardant block, and the flame retardant block is connected with the shielding layer.

4. A flame-retardant reflective film according to claim 3, characterized in that: An air layer is formed between the molding layer and the support layer and corresponding to the position of the metal reflective layer.

5. A flame-retardant reflective film according to claim 3, characterized in that: The flame retardant block is made of magnesium hydroxide flame retardant.

6. A flame-retardant reflective film according to claim 1, characterized in that: The waiting surface layer is made of TPU material.

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