Reusable protective film

Abstract

The utility model discloses a reusable protective film which comprises an upper film group and a lower film group attached to the edge of the upper film group, the upper film group comprises a hardened layer, a first thin film layer, a UV (ultraviolet) hardened layer, a second thin film layer and a frosted layer which are sequentially attached from top to bottom, the lower film group comprises an acrylic layer, a black film and a self-absorption layer which are sequentially attached from top to bottom, and the UV hardening layer is made of dual-curing polyurethane resin. According to the utility model, the structural design is reasonable, the whole flexible film material is adopted, and the characteristics of the dual-curing polyurethane resin of the UV hardening layer are combined, so that the whole flexible glass has certain flexibility, can reach the stiffness and texture close to those of glass after being irradiated by UV, can be repeatedly used, and is convenient to use. The problems that a traditional glass material is fragile and a single film is prone to wrinkling are effectively solved, and carrying and using are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of protective film, especially to a reusable protective film. BACKGROUND

[0002] The protective film on the market is generally divided into tempered glass protective film and plastic protective film, which is pasted on the TP screen by a layer of glue. It is difficult to reattach after tearing off, and it is easy to be scrapped. In some special scenarios, consumers expect the protective film to have some special functions, such as anti-peeping, writing, etc., and to return to a transparent and smooth state after use.

[0003] Therefore, a special application of detachable and reusable protective film appears on the market. For example, the Chinese utility model patent with publication number "CN215250574U" discloses a detachable anti-peeping film, which comprises an anti-peeping film body, a first magnetic strip and a second magnetic strip. The anti-peeping film body is composed of tempered glass, an adhesive layer, an anti-peeping layer, a silk printing color layer and an AG film. The top of the tempered glass is coated with an adhesive layer, and the top of the adhesive layer is bonded with an anti-peeping layer. The bottom of the tempered glass is bonded with a silk printing color layer, and the bottom of the silk printing color layer is bonded with an AG film. The four corners of the top of the anti-peeping layer are fixedly connected with the first magnetic strip, and the four corners of the bottom of the AG film are fixedly connected with the second magnetic strip. The scheme is completed by the cooperation of the tempered glass, the anti-peeping film and the magnetic strip adsorption.

[0004] For example, the Chinese utility model patent with publication number "CN207264688U" discloses an electronic screen anti-peeping device, which comprises an anti-peeping film with a size suitable for the electronic screen. The upper part of the anti-peeping film is provided with a positioning adhesive tape, and the positioning adhesive tape is provided with a clamping device for fixing the anti-peeping device on the electronic instrument. The scheme is fixed on the electronic instrument by the cooperation of the anti-peeping film, the positioning adhesive tape and the clamping device, achieving the effect of being detachable and reusable at any time.

[0005] The above two schemes can achieve the effect of being reusable in use, but there are many problems in actual use. For example, the design of the first scheme is prone to breakage during disassembly, and is not easy to carry and store. The film of the second scheme is too soft, and although it has positioning, it does not have the stiffness of glass, and is prone to wrinkling and deformation, affecting the effect of repeated use. UTILITY MODEL CONTENT

[0006] In view of the above shortcomings, the utility model aims to provide a reusable protective film with reasonable structure design and good use effect.

[0007] To achieve the above purpose, the utility model provides the technical scheme:

[0008] A reusable protective film comprises an upper film group and a lower film group attached to the edge of the upper film group, the upper film group comprises a hardening layer, a first film layer, a UV hardening layer, a second film layer and a frosted layer attached in sequence from top to bottom, the lower film group comprises an acrylic layer, a black film and a self-absorbing layer attached in sequence from top to bottom, and the UV hardening layer is a double-cured polyurethane resin.

[0009] As a preferred scheme of the present application, the lower film group and the upper film group are inconsistent in size. Instead, they are consistent with the size of the black invisible area of the display screen of the electronic product to which they are applied.

[0010] As a preferred scheme of the present application, the thickness of the hardening layer is 2-10 microns, and the hardness is 1-4H, which can protect the underlying film layer from scratching and abrasion.

[0011] As a preferred scheme of the present application, the first film layer is a polyester film with a thickness of 100-250 microns. The second film layer is a polyester film with a thickness of 100-250 microns, which has good toughness and tear resistance and good support effect.

[0012] As a preferred scheme of the present application, the thickness of the UV hardening layer is 25-100 microns, which has high hardness and stiffness.

[0013] As a preferred scheme of the present application, the thickness of the acrylic layer is 10-50 microns, which has good transparency and glossiness and can improve the appearance quality of the protective film.

[0014] As a preferred scheme of the present application, the thickness of the black film is 12-40 microns, which has good appearance effect.

[0015] As a preferred scheme of the present application, the self-absorbing layer is a polyurethane resin with a thickness of 20-60 microns, which has good adhesion and self-adhesion.

[0016] The present application has the advantages of reasonable structure, overall use of flexible film material, combination of the characteristics of the double-cured polyurethane resin of the UV hardening layer, overall flexibility, stiffness and texture close to glass after UV irradiation, repeated use, effective solution to the problems of easy breakage of traditional glass material and easy wrinkling of single film, and convenience in carrying and use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of the cross-sectional structure of the present application.

[0018] Figure 2This is a schematic diagram of the main structure of this utility model. Detailed Implementation

[0019] Example: See Figure 1 and Figure 2 This utility model provides a reusable protective film, which includes an upper film assembly 1 and a lower film assembly 2 attached to the edge of the upper film assembly 1.

[0020] The upper membrane assembly 1 includes a hardened layer 11, a first thin film layer 12, a UV hardening layer 13, a second thin film layer 14 and a frosted layer 15, which are sequentially bonded from top to bottom. The lower membrane assembly 2 includes an acrylic layer 21, a black thin film 22 and a self-absorbing layer 23, which are sequentially bonded from top to bottom.

[0021] Preferably, the thickness of the hardened layer 11 is 2 to 10 micrometers and the hardness is 1 to 4H. It can be a transparent hardened layer 11 or a frosted hardened layer, which can protect the underlying film layer from scratches and wear.

[0022] The UV hardening layer 13 is preferably a dual-curing polyurethane resin with a thickness of 25 to 100 micrometers. After its thermosetting, its Shore hardness is below 50A and it is sticky, which can adhere the polyester film. However, after being irradiated by a UV lamp (UVA), the UV hardening layer 13 has high hardness and stiffness.

[0023] The first film layer 12 and the second film layer 14 are both preferably polyester films with a thickness of 100 to 250 micrometers, which have good toughness and tear resistance and good support effect.

[0024] The thickness of the frosted layer 15 is preferably 3 to 12 micrometers, the haze is generally required to be 4 to 12%, and the water droplet angle is required to be below 105°.

[0025] The thickness of the acrylic layer 21 is preferably 10 to 50 micrometers, and the viscosity is required to be above 300g / inch.

[0026] The thickness of the black film 22 is preferably 12 to 40 micrometers, and its transmittance is required to be ≤2%. The material is polyester.

[0027] The self-adhesive layer 23 is preferably a polyurethane resin with a thickness of 20 to 60 micrometers, which has good adhesion and self-adhesion, generally with an adhesion of less than 5g / inch, and also has a certain ability to recover from minor scratches.

[0028] In production, the upper film group 1 is die cut to be inconsistent with the screen size of the electronic product, but consistent with the size of the black invisible area of the display screen of the electronic product applied. Specifically, the lower film group 2 is die cut according to the screen frame size of the electronic product, and then the frosted layer 15 and the acrylic layer 21 are attached to form a whole, that is, the lower film group 2 is attached to the edge position of the upper film group 1. The utility model has certain flexibility as a whole, can reach the stiffness and texture close to glass after UV irradiation, can be used repeatedly for many times, and effectively solves the problems that the traditional glass material is easy to break and the single film is easy to wrinkle.

[0029] According to the disclosure and teaching of the above description, the person skilled in the art of the utility model can also change and modify the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the utility model should fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the utility model, and other film bodies same as or similar to them are within the protection scope of the utility model.

Claims

1. A reusable protective film, characterized by, It comprises an upper film group and a lower film group attached to the edge of the upper film group, the upper film group comprises a hardening layer, a first film layer, a UV hardening layer, a second film layer and a frosted layer attached in order from top to bottom, the lower film group comprises an acrylic layer, a black film and a self-absorbing layer attached in order from top to bottom, the UV hardening layer is a double-cured polyurethane resin.

2. The reusable protective film according to claim 1, wherein The outer dimensions of the lower film group and the upper film group are inconsistent.

3. The reusable protective film according to claim 1 or 2, characterized in that, The thickness of the hardening layer is 2-10 microns.

4. The reusable protective film according to claim 1 or 2, characterized in that, The first film layer is a polyester film with a thickness of 100-250 microns.

5. The reusable protective film according to claim 1 or 2, wherein The thickness of the UV hardening layer is 25-100 microns.

6. The reusable protective film according to claim 1 or 2, wherein The second film layer is a polyester film with a thickness of 100-250 microns.

7. The reusable protective film according to claim 1 or 2, wherein The thickness of the frosted layer is 3-12 microns.

8. The reusable protective film according to claim 1 or 2, wherein The thickness of the acrylic layer is 10-50 microns.

9. The reusable protective film according to claim 1 or 2, wherein The thickness of the black film is 12-40 microns.

10. The reusable protective film according to claim 1 or 2, wherein The self-absorbing layer is a polyurethane resin with a thickness of 20-60 microns.

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