Polyester film with heat resistance

Abstract

The utility model discloses a polyester film with heat resistance, which comprises a polyester film body, the polyester film body comprises a first polyester film layer, a heat-resistant layer and a second polyester film layer, the bottom surface of the first polyester film layer is bonded with the top surface of the heat-resistant layer through a first bonding layer, and the bottom surface of the second polyester film layer is bonded with the top surface of the heat-resistant layer through a second bonding layer. The polyester film is composed of a sandwich structure, namely the first polyester film layer, the heat-resistant layer and the second polyester film layer, the sandwich structure can improve the strength and durability of the film, meanwhile, permeation of substances such as oxygen and water vapor can be more effectively blocked, and therefore the heat-resistant polyester film has the beneficial effects that the heat-resistant polyester film has the good heat-resistant effect, and the service life of the heat-resistant polyester film is prolonged. The high-temperature-resistant polyester film has the advantages that the high-temperature-resistant polyester film is used for protecting packaged articles from being influenced by the outside, and meanwhile, the epoxy resin and the polyurethane adhesive are used as adhesives, so that the bonded polyester film has good high-temperature resistance, can absorb impact and vibration and reduce stress concentration during use, and has good weather resistance and aging resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester films, in particular to a polyester film with heat-resistant performance. Background Art

[0002] Polyester film is a film material made of polyester resin. Polyester resin is an organic polymer compound with good physical properties and chemical stability. Polyester film is usually transparent, has high strength and tear resistance, and can provide excellent thermal insulation and mechanical protection.

[0003] After searching, in the prior art, the publication number CN217553379U discloses a polyester film with strong heat resistance, including a reel, the outer wall of the reel is provided with a polyester film body, the top of the polyester film body is fixedly connected with a film flat layer, the bottom of the film flat layer is fixedly connected with a rock wool layer, the bottom of the rock wool layer is fixedly connected with a filling layer, the bottom of the filling layer is fixedly connected with an aluminum silicate fiber layer, the bottom of the aluminum silicate fiber layer is fixedly connected with a glass wool layer, and the bottom of the glass wool layer is fixedly connected with a polyetherimide layer. The rock wool layer uses high-quality basalt, dolomite and the like as main raw materials, and is an artificial inorganic fiber made by high-speed centrifugal equipment after high-temperature melting, and has extremely strong thermal insulation and fireproof properties; the polyetherimide layer has high temperature resistance and long-term working temperature of 200°C, high strength, high toughness, good wave transmission, wear resistance, insulation, and corrosion resistance, and it has a large number of tiny air pores, so that it can play the role of thermal insulation, sound absorption and noise reduction and safety protection.

[0004] However, the heat resistance of the polyester film needs to be improved during use, and it is also prone to delamination and deformation due to excessively high temperatures. Utility Model Content

[0005] The purpose of the utility model is to provide a polyester film with heat resistance to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A polyester film with heat-resistant properties comprises a polyester film body, wherein the polyester film body comprises a first polyester film layer, a heat-resistant layer and a second polyester film layer, wherein the bottom surface of the first polyester film layer is bonded to the top surface of the heat-resistant layer via a first adhesive layer, and the bottom surface of the heat-resistant layer is bonded to the second polyester film layer via a second adhesive layer.

[0008] Preferably, the heat-resistant layer comprises a glass fiber layer and a ceramic fiber layer, and two sides of the glass fiber layer are respectively bonded to the first polyester film layer and the ceramic fiber layer through a first bonding layer.

[0009] Preferably, the heat-resistant layer further comprises a polyimide layer and a polyamide layer, the two sides of the polyimide layer are respectively bonded to the ceramic fiber and the polyamide layer through a second bonding layer source, and the polyamide layer is bonded to the top surface of the second polyester film layer.

[0010] Preferably, the first adhesive layers are all epoxy resin layers.

[0011] Preferably, the second adhesive layer is made of polyurethane glue.

[0012] Preferably, both sides of the glass fiber layer, ceramic fiber layer, polyimide layer and polyamide layer are rough surfaces.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By adopting a "sandwich" structure of the polyester film, namely a first polyester film layer, a heat-resistant layer and a second polyester film layer, the "sandwich" structure can increase the strength and durability of the film, making it more durable and less prone to damage. At the same time, it can more effectively block the penetration of substances such as oxygen and water vapor, and protect the packaged items from external influences.

[0015] The heat-resistant layer is composed of a variety of materials including glass fiber layer, ceramic fiber layer, polyimide layer and polyamide layer, so that the polyester film can maintain stability in a high temperature environment and is not easily deformed through the addition of the heat-resistant layer. At the same time, epoxy resin and polyurethane glue are used as adhesives, so that the bonded polyester film has good high temperature resistance, can absorb impact and vibration, reduce stress concentration, and has good weather resistance and aging resistance when in use.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the polyester film body of this embodiment of the utility model;

[0018] Figure 2 For the utility model Figure 2 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1, first polyester film layer; 2, heat-resistant layer; 21, glass fiber layer; 22, ceramic fiber layer; 23, polyimide layer; 24, polyamide layer; 3, second polyester film layer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1-2 , the utility model provides embodiments:

[0022] Example 1

[0023] A polyester film with heat-resistant performance comprises a polyester film body, wherein the polyester film body comprises a first polyester film layer 1, a heat-resistant layer 2 and a second polyester film layer 3, wherein the bottom surface of the first polyester film layer 1 is bonded to the top surface of the heat-resistant layer 2 via a first adhesive layer, and the bottom surface of the heat-resistant layer 2 is bonded to the second polyester film layer 3 via a second adhesive layer.

[0024] The heat-resistant layer 2 includes a glass fiber layer 21 and a ceramic fiber layer 22. Both sides of the glass fiber layer 21 are bonded to the first polyester film layer 1 and the ceramic fiber layer 22 respectively through a first bonding layer.

[0025] The glass fiber layer 21 is a material composed of glass fibers, which are usually thin and long fiber structures. Glass fibers have high heat resistance and can maintain stability in high temperature environments, thereby improving the heat resistance of the polyester film. Secondly, glass fibers have high strength and rigidity, which can effectively enhance the mechanical properties of the polyester film, making it more durable and wear-resistant. Moreover, glass fibers have good corrosion resistance to many chemical substances and can improve the chemical stability of the polyester film.

[0026] The ceramic fiber layer 22 is a fibrous material made of alumina, silicate and other materials. Compared with glass fiber, ceramic fiber has higher heat resistance and chemical stability, so it has better performance in some special environments. Ceramic fiber has high high temperature resistance and can maintain stability in high temperature environments, so it can significantly improve the heat resistance of polyester film.

[0027] Example 2

[0028] On the basis of Example 1, in order to further improve the heat resistance of the polyester film, Figure 2 As shown, the heat-resistant layer 2 also includes a polyimide layer 23 and a polyamide layer 24 . Both sides of the polyimide layer 23 are bonded to the ceramic fiber and the polyamide layer 24 respectively through a second adhesive layer source, and the polyamide layer 24 is bonded to the top surface of the second polyester film layer 3 .

[0029] Both polyimide and polyamide have excellent high temperature resistance and can maintain stability in high temperature environments. The combined use can enhance the overall heat resistance of the material. Both polyimide and polyamide have excellent mechanical strength and rigidity, which can make the polyester film more durable and wear-resistant. At the same time, both polyimide and polyamide have good chemical stability and can further resist the erosion of many chemicals.

[0030] Among them, the first adhesive layer is an epoxy resin layer, and the second adhesive layer is a polyurethane glue.

[0031] Epoxy resin has excellent bonding strength and durability, and can firmly bond various materials. At the same time, epoxy resin has excellent high temperature resistance after curing, can maintain stability in high temperature environment, and is not easy to soften or fail, so that the first polyester film, glass fiber layer 21 and ceramic fiber layer 22 can be effectively bonded firmly. Polyurethane glue has good elasticity and flexibility, can absorb impact and vibration, reduce stress concentration, and thus improve the durability of the bonding part. Polyurethane glue has good weather resistance and aging resistance, so that the second polyester film, polyimide layer 23 and polyamide layer 24 can have good flexibility.

[0032] Among them, both sides of the glass fiber layer 21, the ceramic fiber layer 22, the polyimide layer 23 and the polyamide layer 24 are rough surfaces, which can improve the adhesion between the first polyester film layer 1, the heat-resistant layer 2 and the second polyester film layer 3 to prevent separation and stratification.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyester film with heat resistance, comprising a polyester film body, characterized in that: The polyester film body comprises a first polyester film layer (1), a heat-resistant layer (2) and a second polyester film layer (3), wherein the bottom surface of the first polyester film layer (1) is bonded to the top surface of the heat-resistant layer (2) via a first adhesive layer, and the bottom surface of the heat-resistant layer (2) is bonded to the second polyester film layer (3) via a second adhesive layer; The heat-resistant layer (2) comprises a glass fiber layer (21) and a ceramic fiber layer (22), and two sides of the glass fiber layer (21) are respectively bonded to the first polyester film layer (1) and the ceramic fiber layer (22) via a first bonding layer; The heat-resistant layer (2) further comprises a polyimide layer (23) and a polyamide layer (24), the two sides of the polyimide layer (23) being respectively bonded to the ceramic fiber and the polyamide layer (24) via a second bonding layer source, and the polyamide layer (24) being bonded to the top surface of the second polyester film layer (3).

2. The polyester film with heat resistance according to claim 1, characterized in that: The first adhesive layers are all epoxy resin layers.

3. The polyester film with heat resistance according to claim 1, characterized in that: The second adhesive layer is made of polyurethane glue.

4. The polyester film with heat resistance according to claim 1, characterized in that: Both sides of the glass fiber layer (21), the ceramic fiber layer (22), the polyimide layer (23) and the polyamide layer (24) are rough surfaces.

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