Reflective film capable of quickly distinguishing damp

Abstract

The reflective film comprises a protective layer, a reflective layer and a bottom layer which are sequentially stacked from top to bottom, the reflective layer is composed of a base layer and a plurality of glass beads embedded in the surface of the base layer, an air layer is reserved between the protective layer and the base layer, and a metal coating is evaporated on the lower hemispherical surface of each glass bead. The surface, away from the bottom layer, of the base layer is coated with an indicating layer which is mainly made of anhydrous sodium carbonate. The indicating layer is arranged in the reflective film, the indicating layer is mainly made of anhydrous sodium carbonate, when water permeates into the air layer, the anhydrous sodium carbonate is blue after absorbing water, road administration workers usually work in the daytime, whether the retroreflection effect of the reflective film of the traffic sign is reduced or not can be rapidly recognized with naked eyes, timely replacement is facilitated, and the working efficiency is improved; and guarantee is provided for safe travel of people.

Description

Technical Field

[0001] The invention relates to the field of reflective films, in particular to a reflective film capable of quickly identifying moisture. Background Art

[0002] Reflective film is a kind of retro-reflective material that has been made into a film and can be directly used. It is made by using glass bead technology, micro-prism technology, synthetic resin technology, film technology, coating technology and micro-replication technology. It is widely used in various road traffic safety signs, traffic safety facilities and other fields, and can play an obvious safety warning role.

[0003] Most reflective films are used in outdoor environments. Traditional reflective films lack waterproof design, which results in the reflective film being soaked by rain and the rainwater seeping into the inside of the reflective film, reducing the reflective effect of the reflective film. Referring to the Chinese utility model patent with authorization announcement number CN219349175U, a waterproof reflective film is disclosed, which reduces the occurrence of water entering the inside of the reflective film through a waterproof surface layer, and at the same time uses a water guide groove to guide the flow of water on the surface of the waterproof surface layer, reducing the amount of water staying on the waterproof surface layer, and further reducing the probability of water entering the waterproof surface layer. However, this kind of reflective film still has shortcomings. The reflective film is easily affected by the environment and ages, resulting in the destruction of the sealing, causing water to seep into the film, reducing the reflective effect, and blurring the traffic safety warning. The water seeping into the film cannot be identified by the naked eye, resulting in untimely replacement of traffic signs, and there are safety hazards. Summary of the invention

[0004] The invention provides a reflective film capable of quickly identifying moisture, so as to overcome the problem that the naked eye cannot identify whether moisture has penetrated into the film in the existing reflective film.

[0005] The present invention adopts the following technical solution:

[0006] A reflective film capable of quickly identifying moisture, comprising a protective layer, a reflective layer and a bottom layer stacked in sequence from top to bottom, wherein the reflective layer is composed of a base layer and a plurality of glass beads embedded on the surface of the base layer, an air layer is reserved between the protective layer and the base layer, a metal coating layer is evaporated on the lower hemisphere surface of the glass beads, and an indication layer is coated on the surface of the base layer away from the bottom layer, wherein the indication layer is mainly made of anhydrous sodium carbonate.

[0007] Furthermore, the thickness of the indicator layer is 15-25 μm.

[0008] Furthermore, a waterproof layer is compounded on the surface of the protective layer, and the waterproof layer is a hydrophobic silicon dioxide layer.

[0009] Furthermore, the bottom layer is composed of an adhesive layer and a release layer, and the adhesive layer is bonded to a side of the base layer away from the air layer.

[0010] Furthermore, the metal plating layer is a silver plating layer or an aluminum plating layer.

[0011] Furthermore, the base layer is made of a photocurable resin material, and the photocurable resin is one or a mixture of two of epoxy acrylate, polyurethane acrylate, polyester acrylate and polyether acrylate.

[0012] Furthermore, the protective layer is a PVC film.

[0013] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: an indicator layer is provided in the reflective film of the present application, and the indicator layer is mainly made of anhydrous sodium carbonate. When water penetrates into the air layer, the anhydrous sodium carbonate absorbs water and displays blue. Road maintenance workers usually work during the day and can quickly identify with the naked eye whether the retro-reflective effect of the reflective film of the traffic sign is reduced, which is conducive to timely replacement, improves work efficiency, and provides protection for people's safe travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the reflective film of the present invention. DETAILED DESCRIPTION

[0015] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0016] Reference Figure 1 A reflective film that can quickly identify moisture, including a protective layer 2, a reflective layer 3 and a bottom layer 4 stacked in sequence from top to bottom, the reflective layer 3 is composed of a base layer 32 and a plurality of glass beads 31 embedded on the surface of the base layer 32, the glass beads 31 are distributed in an array, an air layer 30 is reserved between the protective layer 2 and the base layer 32, a metal coating layer 311 is evaporated on the lower hemisphere of the glass beads 31, and an indication layer 33 is coated on the surface of the base layer 32 away from the bottom layer 4, and the indication layer 33 is mainly made of anhydrous sodium carbonate.

[0017] The thickness of the indicator layer 33 is 15-25 μm.

[0018] The surface of the protective layer 2 is compounded with a waterproof layer 1, and the waterproof layer 1 is a hydrophobic silicon dioxide layer.

[0019] Continue to refer to Figure 1 The bottom layer 4 is composed of an adhesive layer 41 and a release layer 42 , and the adhesive layer 41 is bonded to the side of the base layer 32 away from the air layer 30 .

[0020] The metal plating layer 311 is a silver plating layer or an aluminum plating layer, and preferably the metal plating layer 311 is a silver plating layer.

[0021] The base layer 32 is made of a photocurable resin material, and the photocurable resin is one or a mixture of two of epoxy acrylate, polyurethane acrylate, polyester acrylate and polyether acrylate. Preferably, the photocurable resin is epoxy acrylate.

[0022] The protective layer 2 is a PVC film.

[0023] The reflective film of the present application is provided with an indicator layer 33, which is mainly made of anhydrous sodium carbonate. When water penetrates into the air layer 30, the anhydrous sodium carbonate absorbs water and displays blue. Road maintenance workers usually work during the day and can quickly identify with the naked eye whether the retro-reflective effect of the reflective film of the traffic sign is reduced, which is conducive to timely replacement, improves work efficiency, and provides protection for people's safe travel.

[0024] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A reflective film that can quickly identify dampness, comprising a protective layer, a reflective layer and a base layer stacked in sequence from top to bottom, wherein the reflective layer is composed of a base layer and a plurality of glass beads embedded on the surface of the base layer, an air layer is reserved between the protective layer and the base layer, and a metal coating layer is evaporated on the lower hemisphere of the glass beads, characterized in that: The surface of the base layer away from the bottom layer is coated with an indication layer, which is mainly made of anhydrous sodium carbonate.

2. The reflective film capable of quickly identifying moisture according to claim 1, characterized in that: The thickness of the indicating layer is 15-25 μm.

3. The reflective film capable of quickly identifying moisture as claimed in claim 1, characterized in that: The surface of the protective layer is compounded with a waterproof layer, which is a hydrophobic silicon dioxide layer.

4. The reflective film capable of quickly identifying moisture according to claim 1, characterized in that: The bottom layer is composed of an adhesive layer and a release layer, and the adhesive layer is bonded to a side of the base layer away from the air layer.

5. The reflective film capable of quickly identifying moisture as claimed in claim 1, characterized in that: The metal plating layer is a silver plating layer or an aluminum plating layer.

6. The reflective film capable of quickly identifying moisture according to claim 1, characterized in that: The base layer is made of a light-curing resin material, and the light-curing resin is one of epoxy acrylate, polyurethane acrylate, polyester acrylate and polyether acrylate, or a mixture of two of them.

7. The reflective film capable of quickly identifying moisture according to claim 1, characterized in that: The protective layer is a PVC film.

Images