Polyester film PET release film with good air permeability

Abstract

The utility model relates to the technical field of polyester film PET release films, and discloses a polyester film PET release film with good air permeability, which comprises a release film body, an auxiliary sticking film is arranged at the top of the release film body, a sealing bulge is fixedly arranged at the bottom of the auxiliary sticking film, and the sealing bulge is arranged at the bottom of the release film body. The bottom end of the sealing protrusion is movably connected with the top of the release film body in an inserted mode. According to the polyester film PET release film with the good air permeability, by arranging the auxiliary film, the sealing protrusions, the upper polyester film layer and the air holes, when the auxiliary film is attached to the upper polyester film, the sealing protrusions below the auxiliary film are matched with the air holes in the upper polyester film layer, so that the surface of the upper polyester film layer is sealed; the auxiliary sticking film on the upper polyester film layer is torn down, the air holes in the surface of the upper polyester film layer are exposed, the number of the air holes is large, the air holes are evenly distributed, and therefore the air permeability of the PET release film is improved, and air permeability and sealing use of the PET release film are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester film (PET) release films, in particular to a polyester film (PET) release film with good air permeability. Background Art

[0002] Chinese patent CN215288630U provides a polyester film PET release film with good air permeability. The PET release film body can be cut according to the first scale line and the second scale line, and does not need to be measured with a ruler, and can also prevent the phenomenon of tilting during cutting. The center reference line of the center of the auxiliary pasting outer film can facilitate the pasting of the PET release film body. When the PET release film body needs to be pasted, the center reference line can be aligned with the center line of the pasted object, so as to ensure the accuracy of the pasting of the PET release film body, thereby preventing the phenomenon of pasting misalignment.

[0003] Since the PET release film is provided with an auxiliary adhesive outer film, the number of air holes on the PET release film is small, resulting in poor air permeability of the PET release film. Secondly, although the auxiliary adhesive outer film is provided with a center reference line and a scale line, when the auxiliary adhesive outer film is pasted on the PET release film, the auxiliary adhesive outer film has a pasting offset phenomenon, so that the center reference line and the scale line on the auxiliary adhesive outer film cannot guarantee the accuracy of the PET release film pasting, and it is not convenient for the polyester film PET release film to be accurately pasted. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a polyester film PET release film with good air permeability, which has the advantages of switchable sealing and air permeability, better air permeability and convenient and accurate fitting. It solves the problem that the existing PET release film is provided with an auxiliary pasting outer film, which makes the number of air permeable holes on the PET release film small, resulting in poor air permeability of the PET release film. Secondly, although the auxiliary pasting outer film is provided with a center reference line and a scale line, when the auxiliary pasting outer film is pasted on the PET release film, the auxiliary pasting outer film has a pasting offset phenomenon, which makes the center reference line and the scale line on the auxiliary pasting outer film unable to guarantee the accuracy of the PET release film pasting, and is not convenient for the polyester film PET release film to be accurately fitted.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a polyester film PET release film with good air permeability, comprising a release film body, an auxiliary film is arranged on the top of the release film body, a sealing protrusion is fixedly arranged on the bottom of the auxiliary film, and the bottom end of the sealing protrusion is movably plugged into the top of the release film body.

[0008] Preferably, the release film body includes a PET substrate layer, and an upper polyester film layer and a lower polyester film layer are fixedly provided on the top and bottom of the PET substrate layer respectively, and the bottom of the auxiliary film is bonded to the top of the upper polyester film layer. The lower polyester film can increase the overall light-shielding and heat resistance of the PET release film, and the upper polyester film can make the upper surface of the PET release film body smoother.

[0009] Preferably, a ventilation hole is opened on the top of the upper polyester film layer, and the side surface of the sealing protrusion is matched with the inside of the ventilation hole. When the auxiliary film is attached to the upper polyester film, the sealing protrusions under the auxiliary film respectively cooperate with the ventilation holes on the upper polyester film layer to seal the surface of the upper polyester film layer, thereby facilitating the sealing use of the PET release film.

[0010] Preferably, the four corners on the top of the upper polyester film layer are fixed with positioning protrusions, and the four corners on the top of the auxiliary film are opened with through holes, and the side surfaces of the four positioning protrusions are respectively adapted to the interiors of the four through holes, and the four positioning protrusions on the upper polyester film layer are respectively matched with the four through holes on the auxiliary film, so as to improve the fitting accuracy of the auxiliary film on the surface of the upper polyester film layer.

[0011] Preferably, a center line is arranged at the center of the top of the auxiliary film, and scale lines are arranged on the front and rear sides of the top of the auxiliary film. The PET release film is cut according to the two scale lines without measuring it with a ruler, and the phenomenon of tilting during cutting can be prevented. The center reference line of the auxiliary adhesive film can facilitate the pasting of the PET release film. When the PET release film needs to be pasted, the center reference line is aligned with the center line of the pasted object, so as to ensure the accuracy of the pasting of the PET release film and prevent the phenomenon of misalignment of pasting.

[0012] Compared with the prior art, the utility model provides a polyester film PET release film with good air permeability, which has the following beneficial effects:

[0013] 1. The polyester film PET release film with good air permeability is provided with an auxiliary film, a sealing protrusion, an upper polyester film layer and air holes. When the auxiliary film is attached to the upper polyester film, the sealing protrusions under the auxiliary film are respectively matched with the air holes on the upper polyester film layer to seal the surface of the upper polyester film layer. By tearing off the auxiliary film on the upper polyester film layer, the air holes on the surface of the upper polyester film layer are exposed. The number of air holes is large and evenly distributed, thereby improving the air permeability of the PET release film, and further facilitating the air permeability and sealing use of the PET release film.

[0014] 2. The polyester film PET release film with good air permeability is provided with positioning protrusions and through holes. The four positioning protrusions on the upper polyester film layer are respectively matched with the four through holes on the auxiliary film, so as to improve the fitting accuracy of the auxiliary film on the surface of the upper polyester film layer, so that the center reference line and scale line on the auxiliary adhesive outer film can ensure the accuracy of the PET release film pasting, thereby facilitating the precise fitting of the polyester film PET release film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the polyester film PET release film with good air permeability of the utility model;

[0016] Figure 2 This is a schematic diagram of the release film structure without auxiliary film of the utility model;

[0017] Figure 3 This is a cross-sectional view of the release film structure without auxiliary film of the utility model;

[0018] Figure 4 It is a bottom view of the auxiliary film-sticking structure of the utility model.

[0019] Among them: 1. Release film body; 2. Auxiliary film; 3. Sealing protrusion; 4. PET substrate layer; 5. Upper polyester film layer; 6. Lower polyester film layer; 7. Breathing hole; 8. Positioning protrusion; 9. Through hole; 10. Center line; 11. Scale line. 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 in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4, a polyester film PET release film with good air permeability, comprising a release film body 1, an auxiliary film 2 is arranged on the top of the release film body 1, a center line 10 is arranged at the center of the top of the auxiliary film 2, and scale lines 11 are arranged on the front and back sides of the top of the auxiliary film 2, the release film body 1 comprises a PET substrate layer 4, an upper polyester film layer 5 and a lower polyester film layer 6 are fixedly arranged on the top and bottom of the PET substrate layer 4 respectively, the bottom of the auxiliary film 2 is bonded to the top of the upper polyester film layer 5, a sealing protrusion 3 is fixedly arranged on the bottom of the auxiliary film 2, the bottom end of the sealing protrusion 3 is movably plugged with the top of the release film body 1, a ventilation hole 7 is opened on the top of the upper polyester film layer 5, and the side surface of the sealing protrusion 3 is adapted to the inside of the ventilation hole 7, the auxiliary film 2, the sealing protrusion 3, the upper polyester film layer 5 and the ventilation hole 7 are arranged, and when the auxiliary film 2 is attached to the upper polyester film layer 5, the sealing protrusions 3 under the auxiliary film 2 are respectively attached to the upper polyester film The air holes 7 on the layer 5 cooperate to make the surface of the upper polyester film layer 5 sealed. By tearing off the auxiliary film 2 on the upper polyester film layer 5, the air holes 7 on the surface of the upper polyester film layer 5 are exposed. The number of air holes 7 is large and the distribution is uniform, thereby improving the air permeability of the PET release film, and thus facilitating the ventilation and sealing use of the PET release film. The four corners on the top of the upper polyester film layer 5 are fixedly provided with positioning protrusions 8, and the four corners on the top of the auxiliary film 2 are provided with through holes 9. The side surfaces of the four positioning protrusions 8 are respectively adapted to the inside of the four through holes 9. The positioning protrusions 8 and the through holes 9 are provided, and the four positioning protrusions 8 on the upper polyester film layer 5 are respectively matched with the four through holes 9 on the auxiliary film 2, so as to improve the fitting accuracy of the auxiliary film 2 on the surface of the upper polyester film layer 5, so that the center reference line and the scale line 11 on the auxiliary adhesive outer film can ensure the accuracy of the PET release film pasting, thereby facilitating the precise fitting of the polyester film PET release film.

[0022] When in use, the four positioning protrusions 8 on the upper polyester film layer 5 are respectively matched with the four through holes 9 on the auxiliary film 2 to improve the fitting accuracy of the auxiliary film 2 on the surface of the upper polyester film layer 5, so that the center reference line and scale line 11 on the auxiliary adhesive outer film can ensure the accuracy of the PET release film adhesion. When the PET release film is attached to the article, the sealing protrusions 3 under the auxiliary film 2 are respectively matched with the air holes 7 on the upper polyester film layer 5 to seal the surface of the upper polyester film layer 5. By tearing off the auxiliary film 2 on the upper polyester film layer 5, the air holes 7 on the surface of the upper polyester film layer 5 are exposed, which is convenient for the ventilation and sealing use of the PET release film. The polyester film PET release film has good air permeability, and the auxiliary film 2 on the PET release film has high fitting accuracy, so that the center reference line and scale line 11 on the auxiliary pasting outer film can ensure the accuracy of the PET release film pasting, and the PET release film can be switched between sealing and air permeability. The number of air holes 7 on the release film is large and evenly distributed, and the PET release film has good air permeability, which facilitates the precise fitting and use of the polyester film PET release film.

[0023] Although 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 (PET) release film with good air permeability, comprising a release film body (1), characterized in that: The top of the release film body (1) is provided with an auxiliary film (2), the bottom of the auxiliary film (2) is fixedly provided with a sealing protrusion (3), the bottom end of the sealing protrusion (3) is movably plugged into the top of the release film body (1), the release film body (1) comprises a PET substrate layer (4), the top and bottom of the PET substrate layer (4) are respectively fixedly provided with an upper polyester film layer (5) and a lower polyester film layer (6), the bottom of the auxiliary film (2) is bonded to the top of the upper polyester film layer (5), the top of the upper polyester film layer (5) is provided with an air hole (7), and the side surface of the sealing protrusion (3) is adapted to the inside of the air hole (7).

2. A polyester film PET release film with good air permeability according to claim 1, characterized in that: The four corners on the top of the upper polyester film layer (5) are fixedly provided with positioning protrusions (8), the four corners on the top of the auxiliary film (2) are provided with through holes (9), and the side surfaces of the four positioning protrusions (8) are respectively adapted to the inside of the four through holes (9).

3. The polyester film PET release film with good air permeability according to claim 1, characterized in that: A center line (10) is arranged at the center of the top of the auxiliary film (2), and scale lines (11) are arranged on both the front and rear sides of the top of the auxiliary film (2).

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