High-strength PET (Polyethylene Terephthalate) cover film

Abstract

The utility model discloses a high-strength PET (Polyethylene Terephthalate) covering film, which belongs to the technical field of PET films, aims at solving the problem of poor pulling resistance, and comprises a PET base material layer, a reinforcing layer is attached to the surface of the PET base material layer, a reinforcing layer is attached to the surface of the reinforcing layer, and an antistatic layer is paved on the surface of the reinforcing layer. The enhancement layer is formed by a composite system of nanoscale inorganic particles and a high polymer material and is coated on the surface of the PET base material layer; by introducing the reinforcing layer, the mechanical properties such as tensile strength, tearing strength and wear resistance of the PET covering film are remarkably improved, so that the PET covering film can meet application scenes with higher strength requirements, and the reinforcing layer adopts a composite system of nanoscale inorganic particles and a high polymer material and has good stability and durability; the high-strength PET cover film can keep high-strength performance for a long time, the tensile strength of the PET cover film is further improved through the arrangement of the reinforcing layer, meanwhile, the reinforcing layer can be protected to a certain degree, and the use strength of the PET cover film is improved under the cooperation of the reinforcing layer and the reinforcing layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of PET films, and in particular relates to a high-strength PET covering film. Background Art

[0002] PET (polyethylene terephthalate) covering film has been widely used in electronics, packaging, printing and other fields due to its excellent transparency, heat resistance, chemical corrosion resistance and mechanical properties.

[0003] The prior art discloses a high-strength PET film with a patent announcement number of CN212194590U, which includes a film body and a release paper, wherein the release paper is attached to the surface of the film body; the film body includes a PET substrate, a first adhesive layer, a hardening layer, a second adhesive layer, an antistatic layer, a third adhesive layer, an oleophobic layer, a fourth adhesive layer and an anti-scratch layer, wherein the PET substrate is located at the inner center of the film body, and the top and bottom end surfaces of the PET substrate are respectively provided with a first adhesive layer and a second adhesive layer, wherein the top of the first adhesive layer is attached to the adhesive layer. A hardening layer is installed together, and a third adhesive layer is arranged on the top end face of the hardening layer; an oleophobic layer is installed on the top of the third adhesive layer, and an antistatic layer is installed on the bottom of the second adhesive layer. The high-strength PET film has a simple structure, a strong structural bond, and a high-strength characteristic; when used, it has a good anti-scratch effect; at the same time, it has good anti-fouling and oleophobic effects, and also has an antistatic effect, but in actual use there are still the following deficiencies: from a practical point of view, the high-strength PET film has a weak anti-pulling ability, and is easily damaged by pulling when used.

[0004] Therefore, a high-strength PET covering film is needed to solve the problem of poor tear resistance in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a high-strength PET covering film to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-strength PET covering film, comprising a PET substrate layer, a reinforcing layer attached to the surface of the PET substrate layer, a reinforcing layer attached to the surface of the reinforcing layer, and an antistatic layer laid on the surface of the reinforcing layer.

[0007] It should be noted in the scheme that the reinforcing layer is composed of a composite system of nano-scale inorganic particles and polymer materials and is coated on the surface of the PET substrate layer.

[0008] It is further worth mentioning that the nanometer-scale inorganic particles are nanometer-scale silicon dioxide or nanometer-scale aluminum oxide with high hardness, high wear resistance and good dispersibility. The nanometer-scale inorganic particles have high hardness, high wear resistance and good dispersibility, and can effectively enhance the strength of the covering film.

[0009] It should be further explained that the polymer material is a polyurethane or polyimide which has good compatibility with the PET substrate layer and excellent mechanical properties. The polymer material has the characteristics of good compatibility with the PET substrate and excellent mechanical properties, and can be tightly combined with the PET substrate to form a stable reinforcement layer.

[0010] As a preferred embodiment, the reinforcing layer comprises an adhesive layer, transverse nanowires and longitudinal nanowires, and the transverse nanowires and longitudinal nanowires are laid on the surface of the reinforcing layer through the adhesive layer in a network structure.

[0011] As a preferred embodiment, the adhesive layer is formed of a polymer solution, and the polymer solution can serve as a carrier of the transverse nanowires and the longitudinal nanowires to help the transverse nanowires and the longitudinal nanowires to be evenly distributed in the PET film.

[0012] Compared with the prior art, the high-strength PET covering film provided by the utility model has at least the following beneficial effects:

[0013] (1) By introducing the reinforcement layer, the mechanical properties of the PET covering film, such as tensile strength, tear strength and wear resistance, are significantly improved, enabling it to meet application scenarios with higher strength requirements. The reinforcement layer adopts a composite system of nano-scale inorganic particles and polymer materials, which has good stability and durability and can maintain high strength performance for a long time.

[0014] (2) By setting the reinforcing layer, the tensile strength of the PET covering film is further improved, and at the same time, the reinforcing layer can be protected to a certain extent, so that the use strength of the PET covering film is improved through the cooperation of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal split structure of the utility model.

[0017] In the figure: 1, PET substrate layer; 2, reinforcement layer; 3, strengthening layer; 301, adhesive layer; 302, transverse nanowires; 303, longitudinal nanowires; 4, antistatic layer. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] See also Figure 1-2 The utility model provides a high-strength PET covering film, comprising a PET substrate layer 1, a reinforcing layer 2 attached to the surface of the PET substrate layer 1, a reinforcing layer 3 attached to the surface of the reinforcing layer 2, and an antistatic layer 4 laid on the surface of the reinforcing layer 3.

[0020] By introducing the reinforcing layer, the mechanical properties of the PET covering film, such as tensile strength, tear strength and wear resistance, are significantly improved. With the setting of the reinforcing layer, the tensile strength of the PET covering film is further improved, and at the same time, the reinforcing layer can be protected to a certain extent.

[0021] Further as Figure 1-2 As shown, it is worth explaining in detail that the reinforcing layer 2 is composed of a composite system of nanometer-scale inorganic particles and polymer materials and is coated on the surface of the PET substrate layer 1. The nanometer-scale inorganic particles are nanometer-scale silicon dioxide or nanometer-scale aluminum oxide with high hardness, high wear resistance and good dispersibility, and the polymer material is polyurethane or polyimide with good compatibility with the PET substrate layer 1 and excellent mechanical properties.

[0022] The reinforcing layer 2 is composed of a composite system of nanometer-scale inorganic particles and polymer materials, and its structure is compact and uniform. The nanometer-scale inorganic particles have high hardness, high wear resistance and good dispersibility, and can effectively enhance the strength of the covering film. The polymer material has the characteristics of good compatibility with the PET substrate layer 1 and excellent mechanical properties, and can be tightly combined with the PET substrate layer to form a stable reinforcing layer 2.

[0023] According to the above working process, it can be known that by introducing the reinforcing layer 2, the mechanical properties of the PET covering film, such as tensile strength, tear strength and wear resistance, are significantly improved, so that it can meet the application scenarios with higher strength requirements. The reinforcing layer 2 adopts a composite system of nano-scale inorganic particles and polymer materials, has good stability and durability, and can maintain high-strength performance for a long time.

[0024] Further as Figure 1-2 As shown, it is worth specifying that the reinforcing layer 3 includes an adhesive layer 301, transverse nanowires 302 and longitudinal nanowires 303. The transverse nanowires 302 and longitudinal nanowires 303 are laid on the surface of the reinforcing layer 2 through the adhesive layer 301 in a network structure. The adhesive layer 301 is formed by a polymer solution, and the polymer solution can serve as a carrier of the transverse nanowires 302 and longitudinal nanowires 303 to help the transverse nanowires 302 and longitudinal nanowires 303 to be evenly distributed in the PET film.

[0025] The transverse nanowires 302 and the longitudinal nanowires 303 are uniformly dispersed in the adhesive layer 301 to form a stable nanowire dispersion, and then the nanowire dispersion is added to the reinforcing layer 2 by coating, spraying, dipping or other appropriate methods to further improve the strength of the PET covering film.

[0026] This scheme has the following working process: first, the reinforcing layer 2 is evenly coated on the surface of the PET substrate layer 1 through a specific coating process. During the coating process, the nano-scale inorganic particles are fully mixed with the polymer material to form a uniform coating liquid. The nano-scale inorganic particles in the coating liquid are evenly distributed on the surface of the PET substrate layer 1 during the coating process, and together with the polymer material, a tight and uniform reinforcing layer 2 is formed. The reinforcing layer 2 and the PET substrate layer 1 are tightly combined with the polymer material to form a whole. Then, the transverse nanowires 302 and the longitudinal nanowires 303 are evenly dispersed in the adhesive layer 301 to form a stable nanowire dispersion. The nanowire dispersion is then added to the reinforcing layer 2 by coating, spraying, dipping or other appropriate methods to further improve the strength of the PET covering film. Finally, the antistatic layer 4 is laid on the surface to facilitate the antistatic ability of the PET covering film, prevent mutual electrostatic adsorption during use, and facilitate laying and use.

[0027] In summary: by introducing the reinforcing layer 2, the mechanical properties of the PET covering film, such as tensile strength, tear strength and wear resistance, are significantly improved, so that it can meet the application scenarios with higher strength requirements. The reinforcing layer 2 adopts a composite system of nano-scale inorganic particles and polymer materials, has good stability and durability, and can maintain high strength for a long time; by setting the reinforcing layer 3, the tensile strength of the PET covering film is further improved, and at the same time, the reinforcing layer 2 can be protected to a certain extent, so that the use strength of the PET covering film is improved with the cooperation of the two.

Claims

1. A high-strength PET covering film, comprising a PET substrate layer (1), characterized in that: A reinforcing layer (2) is attached to the surface of the PET substrate layer (1), a reinforcing layer (3) is attached to the surface of the reinforcing layer (2), and an antistatic layer (4) is laid on the surface of the reinforcing layer (3).

2. A high-strength PET covering film according to claim 1, characterized in that: The reinforcing layer (3) comprises an adhesive layer (301), transverse nanowires (302) and longitudinal nanowires (303); the transverse nanowires (302) and longitudinal nanowires (303) are laid on the surface of the reinforcing layer (2) through the adhesive layer (301) in a network structure.

3. A high-strength PET covering film according to claim 2, characterized in that: The adhesive layer (301) is formed from a polymer solution.

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