PE composite film

Abstract

The utility model discloses a PE (Polyethylene) composite film which comprises a supporting layer and a film layer, a bonding layer is arranged on one side of the supporting layer; a thermoplastic layer is arranged on one side, far away from the supporting layer, of the bonding layer; the thermoplastic layer is in contact with a machined part, so that the machined part is embedded into the thermoplastic layer; the thermoplastic layer is used for adhering and transferring a workpiece, the thermoplastic layer is connected with the supporting layer through the bonding layer, the thermoplastic layer comprises three layers, has low melting point and high adhesive force, enables the workpiece to be embedded in the thermoplastic layer, has very strong adhesive force, and can effectively prevent the workpiece from falling off due to mechanical action in subsequent processing.

Description

Technical Field

[0001] This utility model relates to the field of reflective materials, and in particular to a PE composite film. Background Technology

[0002] In the production of reflective materials, high-performance reflective materials are currently processed using a transfer method. Glass microspheres are embedded in a thermoplastic polymer using a hot roller, then aluminized and coated with adhesive to bond to the substrate. Finally, the composite film is peeled off. However, existing technologies suffer from problems such as high melting point, low adhesion of large-particle-size microspheres, microsphere loss during processing, and low peeling force. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a PE composite film.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a PE composite film, comprising:

[0005] Support layer;

[0006] An adhesive layer is provided on one side of the support layer;

[0007] A thermoplastic layer is provided on the side of the adhesive layer away from the support layer;

[0008] The thermoplastic layer comes into contact with the workpiece, causing the workpiece to be embedded in the thermoplastic layer.

[0009] As a further description of the above technical solution: the thermoplastic layer includes a first polymer layer, a second polymer layer and a third polymer layer.

[0010] As a further description of the above technical solution: one side of the first polymer layer is bonded to the adhesive layer.

[0011] As a further description of the above technical solution: the second polymer layer is disposed on the other side of the first polymer layer, and the third polymer layer is disposed on the other side of the second polymer layer.

[0012] As a further description of the above technical solution: the processed part penetrates the third polymer layer and the second polymer layer, and is embedded in the first polymer layer.

[0013] As a further description of the above technical solution: the processed part is a spherical particle with a particle size of 25-100μm.

[0014] As a further description of the above technical solution: the support layer includes paper or polymer film with a thickness of 30-40μm.

[0015] As a further description of the above technical solution: the thickness of the thermoplastic layer is 10-40μm.

[0016] As a further description of the above technical solution: the material of the first polymer layer is linear high-pressure polyethylene; the material of the second polymer layer is EVA copolymer; and the material of the third polymer layer is EMAA copolymer.

[0017] As a further description of the above technical solution: the adhesive layer is a laminated adhesive.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] The thermoplastic layer is used to adhere and transfer the workpiece. The thermoplastic layer is connected to the support layer through the adhesive layer. The thermoplastic layer consists of three layers and has a low melting point and high adhesion, which allows the workpiece to be embedded in the thermoplastic layer. It has a strong adhesion and can effectively prevent the workpiece from falling off due to mechanical action during subsequent processing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the composite membrane proposed in this utility model.

[0021] Legend:

[0022] 1. Support layer; 2. Adhesive layer; 3. Thermoplastic layer; 31. First polymer layer; 32. Second polymer layer; 33. Third polymer layer; 4. Processed part. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 An embodiment of this utility model is provided: a PE composite film, comprising: a support layer 1; an adhesive layer 2 is disposed on one side of the support layer 1; a thermoplastic layer 3 is disposed on the side of the adhesive layer 2 away from the support layer 1; the thermoplastic layer 3 contacts the workpiece 4, so that the workpiece 4 is embedded in the thermoplastic layer 3.

[0025] In this embodiment, the processed part 4 is glass microspheres, specifically spherical particles with a particle size of 25-100 μm and a refractive index of 1.93. The thermoplastic layer 3 is formed integrally by co-extrusion and is bonded to the support layer 1 through the adhesive layer 2. The thermoplastic layer 3 is used to adhere and transfer the processed part 4. The thermoplastic layer 3 is connected to the support layer 1 through the adhesive layer 2. The thermoplastic layer 3 includes three layers, has a low melting point and high adhesion, so that the processed part 4 is embedded in the thermoplastic layer 3 and has a strong adhesion, which can effectively prevent the processed part 4 from falling off due to mechanical action during subsequent processing.

[0026] The thermoplastic layer 3 includes a first polymer layer 31, a second polymer layer 32, and a third polymer layer 33; one side of the first polymer layer 31 is bonded to the adhesive layer 2; the second polymer layer 32 is disposed on the other side of the first polymer layer 31, and the third polymer layer 33 is disposed on the other side of the second polymer layer 32; the material of the first polymer layer 31 is linear high-pressure polyethylene; the material of the second polymer layer 32 is EVA copolymer; and the material of the third polymer layer 33 is EMAA copolymer.

[0027] In this embodiment, the first polymer layer 31 is linear high-pressure polyethylene, preferably with a melt index of 1-3 g / 10 min, more preferably 1 g / 10 min, and has high strength and temperature resistance;

[0028] The second polymer layer 32 is high-pressure polyethylene LDPE with a melt index of 5-15 g / 10 min, preferably 7.5 g / 10 min, and is blended with ethylene-vinyl acetate copolymer EVA, etc. The melt index of ethylene-vinyl acetate copolymer EVA is 2 g / 10 min, the EV content is 18%, the blending ratio is 10%-60%, preferably 20%, and it has a low melting point.

[0029] The third polymer layer 33 is a blend of high-pressure polyethylene LDPE, ethylene-ethyl acetate copolymer EVA and ethylene-acrylate copolymer EAA. The melt index of high-pressure polyethylene LDPE is preferably 4 g / 10 min, and the blending ratio is 10%-60%, preferably 30%. It has a low melting point and high adhesion.

[0030] In the second polymer layer 32 of the thermoplastic layer 3, a high EV content polyethylene copolymer is blended to lower the melting point of the polymer in the thermoplastic layer 3. In the third polymer layer 33, EMAA material is blended. Due to its hydrogen bonding effect, it is beneficial to improve the adhesion performance of microspheres and increase the peel force.

[0031] The thickness of the thermoplastic layer 3 is 10-40 μm; the processed part 4 penetrates the third polymer layer 33 and the second polymer layer 32, and is embedded in the first polymer layer 31.

[0032] In this embodiment, when the processed part 4 is embedded into the thermoplastic layer 3, the embedding depth of the processed part 4 needs to be in contact with the first polymer layer 31.

[0033] The support layer 1 includes paper or polymer film with a thickness of 30-40 μm.

[0034] In this embodiment, the support layer 1 has high-temperature dimensional stability and includes paper, biaxially oriented PET film, biaxially oriented PP film, etc., preferably biaxially oriented PET film. It is used to support the adhesive layer 2 and the thermoplastic layer 3, and ensures the consistency of the plane of the thermoplastic layer 3 when the processed part 4 is embedded, so that the embedded depth of the processed part 4 is sufficient for adhesion and to prevent the processed part 4 from falling off.

[0035] Adhesive layer 2 is a laminated adhesive.

[0036] In this embodiment, the adhesive layer 2 is a laminating adhesive, such as polyurethane or polyacrylic acid, preferably a two-component polyurethane laminating adhesive.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PE composite film, characterized by, The application relates to a support layer (1) comprising: a support layer (1); a side of the support layer (1) is provided with an adhesive layer (2); a side of the adhesive layer (2) away from the support layer (1) is provided with a thermoplastic layer (3); the thermoplastic layer (3) is in contact with a processing piece (4), so that the processing piece (4) is embedded in the thermoplastic layer (3).

2. The PE composite film according to claim 1, characterized in that: The thermoplastic layer (3) comprises a first polymer layer (31), a second polymer layer (32) and a third polymer layer (33).

3. The PE composite film according to claim 2, characterized in that: One side of the first polymer layer (31) is bonded to the adhesive layer (2).

4. The PE composite film according to claim 2, characterized in that: The other side of the first polymer layer (31) is provided with the second polymer layer (32), and the other side of the second polymer layer (32) is provided with the third polymer layer (33).

5. The PE composite film according to claim 2, characterized in that: The processing piece (4) penetrates the third polymer layer (33) and the second polymer layer (32) and is embedded at the first polymer layer (31).

6. The PE composite film according to claim 1, characterized in that: The processing piece (4) is a spherical particle, and the particle size of the processing piece (4) is 25-100 mu m.

7. The PE composite film according to claim 1, characterized in that: The support layer (1) comprises paper or a polymer film, and the thickness is 30-40 mu m.

8. The PE composite film according to claim 1, characterized in that: The thickness of the thermoplastic layer (3) is 10-40 mu m.

9. The PE composite film according to claim 2, characterized in that: The material of the first polymer layer (31) is linear high-pressure polyethylene; the material of the second polymer layer (32) is an EVA copolymer; and the material of the third polymer layer (33) is an EMAA copolymer.

10. The PE composite film according to claim 1, characterized in that: The adhesive layer (2) is a laminating adhesive.

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