High-temperature-resistant flame-retardant PET (polyethylene terephthalate) protective film

Abstract

The utility model relates to a high-temperature-resistant flame-retardant PET (polyethylene terephthalate) protective film which comprises a release film layer, a first PET base film layer and a second PET base film layer, the first PET base film layer and the second PET base film layer are combined, the release film layer is divided into a plurality of pieces which are adjacent one by one, every two adjacent pieces of release film layer are connected through a connecting strip, the release film layer is connected with one side of the first PET base film layer or one side of the second PET base film layer in an attached mode through an adhesive layer, and the first PET base film layer and the second PET base film layer are connected through a connecting strip. A sealed cavity is formed between the first PET base film layer and the second PET base film layer, the sealed cavity is filled with a heat-absorbing flame-retardant layer, and the heat-absorbing flame-retardant layer comprises a heat absorbent and a flame retardant which are mixed; each release film layer correspondingly bears one first PET base film layer and one second PET base film layer which are combined, are connected in rows and can be stacked layer by layer, and the first PET base film layer and the second PET base film layer can be taken as required according to the number of the first PET base film layer and the second PET base film layer; the heat-absorbing flame-retardant layers are arranged in the first PET base film layer and the second PET base film layer, and a heat absorbent and a flame retardant are scientifically proportioned, so that the heat-absorbing flame-retardant PET film has good high-temperature resistance and flame retardance.

Description

Technical Field

[0001] The utility model relates to the technical field of protective films, in particular to a high-temperature resistant and flame-retardant PET protective film. Background Art

[0002] PET protective film is widely used on product surfaces in electronics, electrical appliances, communications, aerospace, and other fields. With the rapid development of modern technology, material requirements are constantly increasing. Equipment and components often operate in high-temperature environments. Ordinary PET protective film is prone to deformation, shrinkage, or even melting and damage in these high-temperature environments, affecting its effectiveness. Furthermore, in the event of an accident such as a fire, ordinary PET protective film is easily burned, potentially exacerbating the spread of the fire and posing a threat to product and personnel safety.

[0003] Therefore, there is still much room for improvement in the relevant properties of PET protective film to adapt to different usage requirements, which is of great significance for improving product safety and expanding application areas. Summary of the Invention

[0004] The utility model aims to provide a novel high-temperature resistant and flame-retardant PET protective film, so as to solve the problem that the existing protective film has insufficient performance under high temperature and flame environment.

[0005] In order to achieve the above purpose, the solution adopted by the present utility model is as follows:

[0006] A high-temperature resistant and flame-retardant PET protective film comprises a release film layer, a first PET base film layer and a second PET base film layer. The release film layer is divided into a plurality of adjacent sheets. Two adjacent release film layers are connected by a connecting strip. The release film layer is adhered to one side of the first PET base film layer or the second PET base film layer by an adhesive layer. A sealed cavity is provided between the first PET base film layer and the second PET base film layer, and the sealed cavity is filled with a heat-absorbing and flame-retardant layer.

[0007] Furthermore, the heat-absorbing and flame-retardant layer includes a mixture of a heat-absorbing agent and a flame retardant.

[0008] Furthermore, each release film layer correspondingly carries one first PET base film layer and one second PET base film layer.

[0009] Furthermore, adjacent surfaces of the first PET base film layer and the second PET base film layer are provided with concave cavities, a plurality of convex columns are evenly distributed in the concave cavities, and the convex columns connected to the first PET base film layer and the convex columns connected to the second PET base film layer are abutted against each other.

[0010] Furthermore, the heat-absorbing and flame-retardant layer is arranged away from the convex column.

[0011] Furthermore, the thickness of the release film layer is less than the thickness of the first PET base film layer and equals the thickness of the second PET base film layer.

[0012] Furthermore, the volume ratio of the heat absorber to the flame retardant is 2:1.

[0013] Furthermore, the connecting strip is bendable and foldable.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model discloses a high-temperature resistant and flame-retardant PET protective film which is easy to use. Each release film layer correspondingly carries a first PET base film layer and a second PET base film layer, which are connected in a row and can be stacked layer by layer and taken out according to quantity. A heat-absorbing and flame-retardant layer is provided in the first PET base film layer and the second PET base film layer. The heat-absorbing agent and the flame retardant are scientifically matched, have good high-temperature resistance and flame-retardant properties, can maintain stable performance in high-temperature and flame environments, and effectively protect the protected object. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 for Figure 1 A in the middle is an enlarged schematic diagram;

[0018] Figure 3 for Figure 1 Schematic diagram of the cross-section structure along the middle BB direction;

[0019] Figure 4 for Figure 3 The enlarged schematic diagram of point C in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of the release film layer in the present invention;

[0021] In the figure: 1. Release film layer; 1a. Connecting strip; 2. First PET base film layer; 3. Second PET base film layer; 4. Sealed cavity; 4a. Boss; 5. Heat-absorbing and flame-retardant layer; 6. Adhesive layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] like Figures 1 to 5As shown, a high-temperature resistant and flame-retardant PET protective film comprises a release film layer 1, a first PET base film layer 2 and a second PET base film layer 3, wherein the thickness of the release film layer 1 is less than the thickness of the first PET base film layer 2 and equals the thickness of the second PET base film layer 3. The first PET base film layer 2 and the second PET base film layer 3 are peeled off from the release film layer 1 before use. The provision of the release film layer 1 facilitates the use of the PET protective film. When in use, the base film and the release film layer 1 can be easily separated, and the protective base film can be pasted on the surface of the protected object; each piece of the release film layer 1 carries the corresponding The protective film comprises a first PET base film layer 2 and a second PET base film layer 3. The release film layer 1 is divided into several adjacent sheets, arranged in a row. Adjacent release film layers 1 are connected by connecting strips 1a. The release film layers 1 are bonded to one side of the first PET base film layer 2 or the second PET base film layer 3 via an adhesive layer 6. The adhesive layer 6 is used to connect the first PET base film layer 2 or the second PET base film layer 3 to the release film layer 1, and has excellent bonding strength and aging resistance. The adhesive layer 6 is made of an acrylic adhesive or a silicone adhesive. The first PET base film layer 2 or the second PET base film layer 3 forms the main portion of the protective film and has excellent mechanical strength, optical properties, and dimensional stability. It has high tensile strength and tear resistance, is resistant to breakage, and can withstand certain external forces and pulls to protect the surface of the object to which it is applied.

[0024] Specifically, a sealed cavity 4 is provided between the first PET base film layer 2 and the second PET base film layer 3, and the sealed cavity 4 is filled with a heat-absorbing flame-retardant layer 5. The heat-absorbing flame-retardant layer 5 includes a mixture of a heat-absorbing agent and a flame retardant. The polymer of the heat-absorbing agent will undergo molecular chain movement and change when heated, thereby absorbing heat, and the flame retardant will undergo a decomposition reaction when heated, preventing combustion, absorbing a large amount of heat, and reducing the temperature of the material surface. The volume ratio of the heat-absorbing agent and the flame retardant is 2:1, which can effectively prevent the spread of flames and improve the high-temperature flame retardant properties of the protective film.

[0025] In this embodiment: the scientific ratio of the heat absorber and the flame retardant is filled in the sealed cavity 4 between the first PET base film layer 2 and the second PET base film layer 3, so that the PET protective film can maintain good stability in a high temperature environment, preventing the protective film from deformation, shrinkage or melting and damage, and effectively improving the safety of use.

[0026] Specifically, concave cavities are provided on the adjacent surfaces of the first PET base film layer 2 and the second PET base film layer 3, and a number of convex columns 4a are evenly distributed in the concave cavities. The convex columns 4a connected to the first PET base film layer 2 and the convex columns 4a of the second PET base film layer 3 are abutted against each other, thereby expanding the gap between the first PET base film layer 2 and the second PET base film layer 3, and the heat-absorbing and flame-retardant layer 5 is arranged to avoid the convex columns 4a.

[0027] In this embodiment, the abutting upper and lower convex columns 4 a provide a filling space for the heat-absorbing and flame-retardant layer 5 , and also prevent the surfaces of the first PET base film layer 2 and the second PET base film layer 3 from being concave.

[0028] Specific, combined Figure 1 、 Figure 5 As shown, the connecting strip 1a is bendable and foldable, and is connected to the corner of the single release film layer 1. The connecting strip 1a is cut out from the release film layer 1, and the two are of equal thickness and made of the same material. Two adjacent single release film layers 1 are connected by only one connecting strip 1a.

[0029] In this embodiment: the setting of the connecting strip 1a connects adjacent release film layers 1 in a row, which takes up little space after folding and is easy to open and use. The base film is taken from the release film layer 1 as needed according to the quantity, further improving the convenience of using the high-temperature resistant and flame-retardant PET protective film.

[0030] When actually using the high-temperature resistant and flame-retardant PET protective film of the present invention, the required number of release film layers 1 are taken out from the stacked products according to the number of sheets needed, and the corresponding connecting strips 1a are disconnected. Before use, the matching first PET base film layer 2 and the second PET base film layer 3 are peeled off from the release film layer 1 by overcoming the adhesive force of the adhesive layer 6, and can be pasted on the surface of the protected object for use. The unused products are still in an orderly stacked state, occupying little space and being easy to store; the heat-absorbing flame-retardant layer 5 between the first PET base film layer 2 and the second PET base film layer 3 has good high-temperature resistance and flame-retardant properties.

[0031] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, any changes, modifications or additions are all included in the protection scope of the present invention.

Claims

1. A high temperature resistant flame retardant PET protective film, characterized by: The invention comprises a release film layer (1), a first PET base film layer (2) and a second PET base film layer (3) that match each other, wherein the release film layer (1) is divided into a plurality of adjacent sheets, and two adjacent release film layers (1) are connected by a connecting strip (1a), and the release film layer (1) is attached to one side of the first PET base film layer (2) or the second PET base film layer (3) by an adhesive layer (6), and a sealed cavity (4) is provided between the first PET base film layer (2) and the second PET base film layer (3), and the sealed cavity (4) is filled with a heat-absorbing flame-retardant layer (5).

2. The high temperature resistant flame retardant PET protective film according to claim 1, characterized in that: The heat-absorbing flame-retardant layer (5) comprises a mixed heat-absorbing agent and a flame retardant.

3. The high temperature resistant flame retardant PET protective film according to claim 1, characterized in that: Each release film layer (1) correspondingly carries one first PET base film layer (2) and one second PET base film layer (3).

4. The high temperature resistant flame retardant PET protective film according to claim 3, characterized in that: The adjacent surfaces of the first PET base film layer (2) and the second PET base film layer (3) are both provided with concave cavities, and a plurality of convex columns (4a) are evenly distributed in the concave cavities. The convex columns (4a) connected to the first PET base film layer (2) and the convex columns (4a) connected to the second PET base film layer (3) are in contact with each other.

5. The high temperature resistant flame retardant PET protective film according to claim 4, characterized in that: The heat-absorbing and flame-retardant layer (5) is arranged away from the convex column (4a).

6. The high temperature resistant flame retardant PET protective film according to claim 1, characterized in that: The thickness of the release film layer (1) is less than the thickness of the first PET base film layer (2) and equals the thickness of the second PET base film layer (3).

7. The high temperature resistant flame retardant PET protective film according to claim 2, characterized in that: The volume ratio of the heat absorber to the flame retardant is 2:

1.

8. The high temperature resistant flame retardant PET protective film according to claim 1, characterized in that: The connecting strip (1a) can be bent and folded.

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