Matte biaxially oriented polyester film

Abstract

The utility model discloses a matte biaxially oriented polyester film, which relates to the technical field of plastic films and comprises a polyester film body which comprises a base layer, an anti-puncture layer, a fiber layer, a first matte layer, a heat insulation layer, an anti-sticking layer and a second matte layer. The puncture-resistant layer, the fiber layer and the first matte layer are sequentially arranged above the base layer from bottom to top, and the heat insulation layer, the anti-sticking layer and the second matte layer are sequentially arranged below the base layer from top to bottom. According to the anti-puncture polyester film, the anti-puncture layer is arranged and is formed by weaving the first Kevlar fibers and the second Kevlar fibers in a crossed mode, the overall anti-puncture performance of the polyester film body can be well improved, the heat insulation layer is arranged and is the poly-p-phenylene terephthamide layer, heat insulation can be well achieved, and the anti-puncture polyester film is good in anti-puncture performance and good in anti-puncture performance. The thermal oxidation degradation of the polyester film main body at high temperature is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic films, in particular to a matte biaxially oriented polyester film. Background Art

[0002] Polyester film is made of polyethylene terephthalate as raw material, which is made into thick sheets by extrusion and then biaxially stretched to make film material. It is widely used in the fiberglass industry, building materials industry, printing industry, medicine and health care. It is often used as the outer layer material of steaming and boiling packaging and has good printability.

[0003] A matte biaxially oriented polyester film with a search announcement number of CN209274108U has a total thickness of 12 to 100 μm and is an ABA-type three-layer structural film. In the process of preparing the matte film by three-layer co-extrusion, the core layer is designed as a matte layer and the surface layer is designed as a matte layer. Since the matte effect is mainly determined by the degree of light scattering on the film surface, and the presence of silica of different particle sizes can improve the scattering effect of silica of a single particle size, thereby giving the matte film a lower gloss. In addition, the gloss of the matte film can be conveniently adjusted by the ratio of the core layer and the surface layer and the amount of matte masterbatch added to the surface layer, so that the product can meet the market requirements for different gloss levels.

[0004] In response to the aforementioned related technologies, the inventors believe that existing polyester films are susceptible to oxidation at high temperatures, leading to thermal oxidation degradation. Furthermore, existing polyester films have poor puncture resistance, resulting in certain limitations in their use. Therefore, they propose a matte biaxially oriented polyester film. Utility Model Content

[0005] In view of the above problems existing in the existing matte biaxially oriented polyester film, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a matte biaxially oriented polyester film, which solves the problem that the existing polyester film is easily oxidized at high temperatures and causes thermal oxidation degradation, and the existing polyester film has poor puncture resistance, which leads to certain limitations in the use of the existing polyester film.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A matte biaxially oriented polyester film comprises a polyester film main body, wherein the polyester film main body comprises a base layer, an anti-puncture layer, a fiber layer, a first matte layer, a thermal insulation layer, an anti-sticking layer and a second matte layer. The anti-puncture layer, the fiber layer and the first matte layer are sequentially arranged above the base layer from bottom to top, and the thermal insulation layer, the anti-sticking layer and the second matte layer are sequentially arranged below the base layer from top to bottom. The anti-puncture layer can greatly improve the overall puncture resistance of the polyester film main body. At the same time, the thermal insulation layer can effectively insulate and prevent the polyester film from thermal oxidation degradation at high temperatures.

[0009] Preferably, the base layer is a polyethylene terephthalate layer.

[0010] Preferably, the puncture-resistant layer includes a first Kevlar fiber filament and a second Kevlar fiber filament, and the first Kevlar fiber filament and the second Kevlar fiber filament are arranged in a cross pattern.

[0011] Preferably, the fiber layer is a glass fiber layer.

[0012] Preferably, the heat insulating layer is a poly(p-phenylene terephthalamide) layer.

[0013] Preferably, the anti-stick layer is a PEN polyester anti-stick layer.

[0014] Preferably, the first matte layer and the second matte layer are both acrylic transparent matte resin layers.

[0015] Preferably, a first antistatic layer and a second antistatic layer are provided on the surfaces of the first matte layer and the second matte layer, respectively.

[0016] Preferably, the first antistatic layer and the second antistatic layer are both antistatic PC material layers.

[0017] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0018] 1. The utility model provides an anti-puncture layer, which is formed by cross-weaving a first Kevlar fiber and a second Kevlar fiber, and can greatly improve the overall anti-puncture performance of the polyester film body. The utility model also provides an insulation layer, which is a poly(p-phenylene terephthalamide) layer, and can provide good insulation to prevent the polyester film body from thermal oxidation degradation at high temperatures.

[0019] 2. The utility model can avoid the occurrence of adhesion between films by setting the first antistatic layer and the second antistatic layer, and at the same time, the film will not break. It can effectively remove static electricity from the film and reduce adsorption and adhesion between films. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 3 This is an enlarged structural diagram of point A of the present utility model;

[0024] Figure 4 This is a schematic diagram of the anti-puncture layer structure of the utility model;

[0025] Figure 5 This is an enlarged structural diagram of point B of the present invention.

[0026] Description of reference numerals:

[0027] 1. Polyester film body; 2. Base layer; 3. Anti-puncture layer; 4. Fiber layer; 5. First matte layer; 6. Heat insulation layer; 7. Anti-stick layer; 8. Second matte layer; 9. First antistatic layer; 10. Second antistatic layer; 11. First Kevlar fiber filament; 12. Second Kevlar fiber filament. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the utility model discloses a matte biaxially oriented polyester film.

[0030] Example 1

[0031] The utility model provides Figure 1-5 The matte biaxially oriented polyester film shown includes a polyester film body 1, which includes a base layer 2, an anti-puncture layer 3, a fiber layer 4, a first matte layer 5, a heat-insulating layer 6, an anti-sticking layer 7 and a second matte layer 8. The anti-puncture layer 3, the fiber layer 4 and the first matte layer 5 are arranged in sequence above the base layer 2 from bottom to top, and the heat-insulating layer 6, the anti-sticking layer 7 and the second matte layer 8 are arranged in sequence below the base layer 2 from top to bottom.

[0032] Example 2

[0033] Based on the first embodiment, Figure 1-5The utility model is a matte biaxially oriented polyester film, the base layer 2 is a polyethylene terephthalate layer, which has good fiber-forming properties, mechanical properties, wear resistance, creep resistance, low water absorption and electrical insulation properties, making the film waterproof.

[0034] The utility model discloses a matte biaxially oriented polyester film, wherein the puncture-resistant layer 3 includes a first Kevlar fiber filament 11 and a second Kevlar fiber filament 12. The first Kevlar fiber filament 11 and the second Kevlar fiber filament 12 are cross-arranged, which can well improve the overall puncture-resistant performance of the polyester film body 1.

[0035] The utility model provides a matte biaxially oriented polyester film, wherein the fiber layer 4 is a glass fiber layer, which has excellent rigidity and makes the polyester film body 1 have good tear resistance, so that the film surface stiffness of the polyester film body 1 is high.

[0036] The utility model provides a matte biaxially oriented polyester film, wherein the heat insulating layer 6 is a poly(p-phenylene terephthalamide) layer, which can perform heat insulation well and prevent the polyester film body 1 from thermal oxidation degradation at high temperatures.

[0037] The utility model is a matte biaxially oriented polyester film, wherein the anti-sticking layer 7 is a PEN polyester anti-sticking layer, so that the layer has good smoothness.

[0038] The utility model discloses a matte biaxially oriented polyester film, wherein the first matte layer 5 and the second matte layer 8 are both acrylic transparent matte resin layers, which can make the polyester film body 1 in a matte state.

[0039] Example 3

[0040] Based on the second embodiment, Figure 1-3 As shown, the utility model is a matte biaxially oriented polyester film, and the surfaces of the first matte layer 5 and the second matte layer 8 are respectively provided with a first antistatic layer 9 and a second antistatic layer 10, which can avoid the occurrence of adhesion between the films and the film breakage phenomenon. It can effectively remove the static electricity of the film and reduce the adsorption and adhesion between the films.

[0041] The utility model discloses a matte biaxially oriented polyester film, wherein the first antistatic layer 9 and the second antistatic layer 10 are both antistatic PC material layers.

[0042] When in use, the base layer 2 is set, and the base layer 2 is a polyethylene terephthalate layer, which has good fiber-forming properties, mechanical properties, wear resistance, creep resistance, low water absorption and electrical insulation properties, so that the film has a waterproof function. The anti-puncture layer 3 is set, which can greatly improve the overall puncture resistance of the polyester film main body 1. The fiber layer 4 is set, and the fiber layer 4 is a glass fiber layer, which has excellent rigidity and makes the polyester film main body 1 have good tear resistance, so that the film surface stiffness of the polyester film main body 1 is high. The heat insulation layer 6 is set, which can perform heat insulation well and prevent the polyester film main body 1 from thermal oxidation degradation at high temperature. The anti-sticking layer 7 is set, which makes the layer have good smoothness. The first matte layer 5 and the second matte layer 8 are set, and the first matte layer 5 and the second matte layer 8 are both acrylic transparent matte resin layers, which can make the polyester film main body 1 matte. The first antistatic layer 9 and the second antistatic layer 10 are set, which can avoid the occurrence of adhesion between films, and at the same time, there will be no film breakage. It can effectively remove the static electricity of the film and reduce the adsorption and adhesion between films.

[0043] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A matte biaxially oriented polyester film, comprising a polyester film body (1), characterized in that: The polyester film body (1) comprises a base layer (2), an anti-puncture layer (3), a fiber layer (4), a first sub-glossy layer (5), a heat-insulating layer (6), an anti-sticking layer (7) and a second sub-glossy layer (8); the anti-puncture layer (3), the fiber layer (4) and the first sub-glossy layer (5) are sequentially arranged above the base layer (2) from bottom to top, and the heat-insulating layer (6), the anti-sticking layer (7) and the second sub-glossy layer (8) are sequentially arranged below the base layer (2) from top to bottom.

2. The matte biaxially oriented polyester film according to claim 1, characterized in that: The base layer (2) is a polyethylene terephthalate layer.

3. The matte biaxially oriented polyester film according to claim 1, characterized in that: The puncture-resistant layer (3) comprises a first Kevlar fiber filament (11) and a second Kevlar fiber filament (12), wherein the first Kevlar fiber filament (11) and the second Kevlar fiber filament (12) are arranged in a cross-like manner.

4. The matte biaxially oriented polyester film according to claim 1, characterized in that: The fiber layer (4) is a glass fiber layer.

5. The matte biaxially oriented polyester film according to claim 1, characterized in that: The heat insulation layer (6) is a poly(p-phenylene terephthalamide) layer.

6. The matte biaxially oriented polyester film according to claim 1, characterized in that: The anti-sticking layer (7) is a PEN polyester anti-sticking layer.

7. The matte biaxially oriented polyester film according to claim 1, characterized in that: The first matte layer (5) and the second matte layer (8) are both acrylic transparent matte resin layers.

8. The matte biaxially oriented polyester film according to claim 1, characterized in that: A first antistatic layer (9) and a second antistatic layer (10) are respectively provided on the surfaces of the first matte layer (5) and the second matte layer (8).

9. The matte biaxially oriented polyester film according to claim 8, characterized in that: The first antistatic layer (9) and the second antistatic layer (10) are both antistatic PC material layers.

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