High-strength polyester film

Abstract

The utility model discloses a high-strength polyester film, which relates to the technical field of polyester films and comprises a polyester base layer and side protection layers arranged on two sides of the polyester base layer, the polyester base layer is arranged in a double-layer press fit mode, a reinforcing layer is embedded in the polyester base layer and comprises a plurality of reinforcing transverse fibers and reinforcing longitudinal fibers, and the reinforcing transverse fibers and the reinforcing longitudinal fibers are arranged in a matched mode. A plurality of arrangement gaps which are arranged at intervals are formed in the multiple reinforcing layers, each arrangement gap is filled with an elastomer, plasticizing layers are arranged on the two sides of the outer wall of the polyester base layer, and the plasticizing layers are prepared by mixing plasticizers. The polyester base layer, the reinforcing layer, the reinforcing transverse fibers, the reinforcing longitudinal fibers, the elastomer, the plastifying layer and the plasticizer provided by the utility model can enable the polyester film to have higher use strength, and meanwhile, after the film is pressed, the pressing concave area can be quickly rebounded, so that the smoothness of the film in use is ensured.

Description

Technical Field

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

[0002] Polyester film is a film-like material made of polyester resin. During the production process, polyester resin particles are placed in a hopper, dissolved in an extruder, then thinly spread out through the extruder and quickly cooled and solidified into a film. Because of its high strength, it is widely used in food packaging and industrial packaging.

[0003] After searching, the announcement number CN217671576U discloses a high-strength polyester film. The polyester film has a reinforcing component arranged on the polyester film body, which facilitates the overall increase of the high temperature resistance, low temperature resistance, chemical resistance, corrosion resistance and insulation of the polyester layer during use, thereby improving the service life of the polyester layer as a whole.

[0004] However, when the polyester film in the prior art is used, when the film is pressed, the film in the pressed area will be stretched and expanded, and become loose. At the same time, the pressed depression cannot be quickly restored in a short time, resulting in the film being unable to ensure effective flatness when used, reducing the use effect of the polyester film. Utility Model Content

[0005] In view of the above problems existing in the existing high-strength polyester film, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a high-strength polyester film, which solves the problem that after the polyester film is pressed, the groove position cannot be quickly restored, resulting in the film being not flat when used.

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

[0008] A high-strength polyester film, comprising a polyester base layer and side protection layers arranged on both sides of the polyester base layer, wherein the polyester base layer is double-layered, a reinforcing layer is embedded inside the polyester base layer, and the reinforcing layer comprises a plurality of reinforcing transverse fibers and reinforcing longitudinal fibers arranged in a coordinated manner;

[0009] A plurality of spaced-apart gaps are provided inside the plurality of reinforcement layers, and an elastic body is filled inside each of the spacers;

[0010] Both sides of the outer wall of the polyester base layer are provided with plasticizing layers, and the plasticizing layers are made by mixing plasticizers.

[0011] Preferably, the reinforcing layer is connected to the polyester base layer by hot-melt pressing, and a plurality of the reinforcing transverse fibers and reinforcing longitudinal fibers are cross-connected in the longitudinal and transverse directions.

[0012] Preferably, the plurality of reinforcing transverse fibers and reinforcing longitudinal fibers are glass fibers. The use of glass fibers can improve the film's service strength, tensile strength and tear resistance due to the high strength and corrosion resistance of glass fibers, thereby enabling the polyester film to have high-strength use capabilities.

[0013] Preferably, the gap is provided between a plurality of adjacent reinforcing transverse fibers and reinforcing longitudinal fibers.

[0014] Furthermore, a cross-linking agent is embedded inside the polyester base layer.

[0015] Preferably, the cross-linking agent is a melamine formate cross-linking agent. By providing the cross-linking agent, chemical chains can be formed between the polyester molecular chains, increasing the cross-linking density of the molecular chains, thereby improving the use strength and heat resistance of the film.

[0016] Preferably, the plurality of elastomers are all polyurethane elastomers. The use of polyurethane elastomers can increase the elasticity and flexibility of the film, thereby improving the resilience of the concave area of ​​the film after being pressed.

[0017] Preferably, the plasticizer is dibutyl phthalate plasticizer. The use of the plasticizer can further improve the flexibility and processing performance of the film.

[0018] Preferably, the two side protection layers are coated with a UV-curable anti-scratch coating on the side away from each other, which can avoid as many scratches on the surface of the film when it is in use as possible, thereby further improving the use strength of the film.

[0019] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0020] 1. The utility model can make the polyester film have higher use strength by providing a polyester base layer, a reinforcing layer, reinforcing transverse fibers, reinforcing longitudinal fibers, an elastomer, a plasticizing layer and a plasticizer. At the same time, after the film is pressed, the depressed area thereof can rebound quickly, thereby ensuring the flatness of the film when in use.

[0021] 2. The utility model, by providing a side protection layer, can ensure that the film is not easily scratched when in use, and further improve the use strength of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the reinforcing layer of the utility model;

[0025] Figure 3 This is a schematic diagram of the connection structure of the polyester base layer and the cross-linking agent of the utility model;

[0026] Figure 4 It is a schematic diagram of the connection structure of the polyester base layer and the plasticizing layer of the utility model.

[0027] Description of reference numerals:

[0028] 1. Polyester base layer; 2. Side protection layer; 3. Reinforcement layer; 4. Reinforced transverse fiber; 5. Setting gap; 6. Elastomer; 7. Plasticized layer; 8. Reinforced longitudinal fiber; 9. Cross-linking agent. DETAILED DESCRIPTION

[0029] 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 in conjunction with the accompanying drawings.

[0030] The utility model embodiment discloses a high-strength polyester film.

[0031] Example 1

[0032] The utility model provides Figure 1-4 A high-strength polyester film shown includes a polyester base layer 1 and side protection layers 2 arranged on both sides of the polyester base layer 1, the polyester base layer 1 is a double-layer laminated arrangement, a reinforcing layer 3 is embedded inside the polyester base layer 1, and the reinforcing layer 3 includes a plurality of reinforcing transverse fibers 4 and reinforcing longitudinal fibers 8 arranged in a coordinated manner, and the plurality of reinforcing transverse fibers 4 and reinforcing longitudinal fibers 8 are all glass fibers;

[0033] A plurality of spaced-apart gaps 5 are provided inside the plurality of reinforcement layers 3, and an elastomer 6 is filled inside each of the spacers 5, and the plurality of elastomers 6 are all polyurethane elastomers;

[0034] Plasticized layers 7 are provided on both sides of the outer wall of the polyester base layer 1. The plasticized layers 7 are made of a mixture of plasticizers, and the plasticizer is dibutyl phthalate plasticizer.

[0035] Before preparing the polyester film, the polyester base layer 1 is first stretched and formed, and then the reinforcement layer 3 is prepared, and a plurality of elastomers 6 are filled inside the reinforcement layer 3. Since the reinforcement layer 3 is a double-layer arrangement, the reinforcement layer 3 can be arranged in the middle layer of the polyester base layer 1 and pressed, so that the polyester base layer 1 can have the strength, tensile strength and tear resistance of the film under the support of the glass fiber inside the reinforcement layer 3. At the same time, the arrangement of the plurality of elastomers 6 can improve the flexibility of the film, thereby improving the resilience of the concave area after the film is pressed. The supplementary wrapping of the plasticizing layer 7 can further improve the flexibility and processing performance of the film under the provision of the plasticizer. Finally, the two side protective layers 2 are wrapped on the outside of the polyester base layer 1 to complete the final forming of the polyester film.

[0036] Example 2

[0037] Embodiment 2 is based on embodiment 1 in order to increase the strength of the polyester film after layer 3 is formed. Figure 2 As shown, the reinforcing layer 3 is connected to the polyester base layer 1 by hot melt pressing, a plurality of reinforcing transverse fibers 4 and reinforcing longitudinal fibers 8 are cross-connected in the longitudinal and transverse directions, and gaps 5 are provided between adjacent plurality of reinforcing transverse fibers 4 and reinforcing longitudinal fibers 8 .

[0038] The staggered and cross-arranged arrangement of multiple reinforcing transverse fibers 4 and reinforcing longitudinal fibers 8 can make the overall compression resistance of the reinforcing layer 3 better, thereby improving the tensile strength and use strength of the film. At the same time, the opening of the gap 5 can enable multiple elastomers 6 to be stably placed. At this time, after the film is pressed, the pressed area can quickly rebound under the control of the glass fibers and elastomers 6 inside the reinforcing layer 3, so that the film can remain flat, thereby improving the use effect of the film.

[0039] Example 3

[0040] Example 3 is based on Example 1 in order to further improve the use strength and resilience of the polyester film. Figure 3 As shown, a cross-linking agent 9 is embedded inside the polyester base layer 1, and the cross-linking agent 9 is a melamine formate cross-linking agent.

[0041] By providing the cross-linking agent 9, chemical chains can be formed between the polyester molecular chains, thereby increasing the cross-linking density of the molecular chains. The cross-linking agent 9 is in direct contact with the polyester base layer 1, thereby improving the use strength and heat resistance of the film.

[0042] Example 4

[0043] Example 4 is based on Example 1 to further improve the use strength of the polyester film. Figure 1 As shown, the two side protection layers 2 are coated with a UV-curable anti-scratch coating on the side away from each other.

[0044] By arranging a side protection layer 2 on the outside of the polyester base layer 1, the strength of the polyester film can be improved by applying a UV-cured anti-scratch coating on the outside of the side protection layer 2, and as much scratches as possible on the outside of the film when it is used, thereby preventing the film from being easily broken due to the presence of scratches during use, thereby further improving the high-strength use effect of the film.

[0045] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions 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 high-strength polyester film, comprising a polyester base layer (1) and side protection layers (2) arranged on both sides of the polyester base layer (1), characterized in that: The polyester base layer (1) is provided in a double-layer laminated arrangement, a reinforcing layer (3) is embedded inside the polyester base layer (1), and the reinforcing layer (3) comprises a plurality of reinforcing transverse fibers (4) and reinforcing longitudinal fibers (8) arranged in a coordinated manner; A plurality of spaced-apart arrangement gaps (5) are provided inside the plurality of reinforcement layers (3), and an elastic body (6) is filled inside each of the arrangement gaps (5); Plasticized layers (7) are provided on both sides of the outer wall of the polyester base layer (1), and the plasticized layers (7) are made of a mixture of plasticizers.

2. The high-strength polyester film according to claim 1, characterized in that: The reinforcing layer (3) is connected to the polyester base layer (1) by hot-melt pressing, and the plurality of reinforcing transverse fibers (4) and reinforcing longitudinal fibers (8) are cross-connected in the longitudinal and transverse directions.

3. The high-strength polyester film according to claim 1, characterized in that: The plurality of reinforcing transverse fibers (4) and reinforcing longitudinal fibers (8) are all glass fibers.

4. The high-strength polyester film according to claim 1, characterized in that: The gap (5) is provided between a plurality of adjacent reinforcing transverse fibers (4) and reinforcing longitudinal fibers (8).

5. The high-strength polyester film according to claim 1, characterized in that: A cross-linking agent (9) is embedded inside the polyester base layer (1).

6. The high-strength polyester film according to claim 5, characterized in that: The crosslinking agent (9) is a melamine formate crosslinking agent.

7. The high-strength polyester film according to claim 1, characterized in that: The plurality of elastomers (6) are all polyurethane elastomers.

8. The high-strength polyester film according to claim 1, characterized in that: The plasticizer is dibutyl phthalate plasticizer.

9. The high-strength polyester film according to claim 1, characterized in that: The two side protection layers (2) are both coated with a UV-curable anti-scratch coating on the side away from each other.

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