Bubble-proof PET film

Abstract

The utility model provides a kind of anti-bubble PET film, it is related to polymer functional film technical field, including storage frame, and film main body is dynamically connected on storage frame, and film main body is composed of PET base material layer, internal layer inlaid with PET base material layer and the profile separation film connected with internal layer, through hole is set up on PET base material layer, gas guide channel, first glue storage cavity body, second glue storage cavity body are slidably connected in internal layer, and fixed communication has communication pipe between first glue storage cavity body and second glue storage cavity body, profile separation film bottom is provided with gas guide hole, and profile separation film;The utility model in the present application is mixed by elastic microsphere and UV resin internal layer and PET base material precision inlay design, so that the bonding strength is promoted to ≥5N / cm, while, the internal layer of irregular concave-convex line enhances impact resistance, and the functional integration of profile separation film is adapted to existing equipment by segmented pulling design, which can effectively prevent dust and water vapor from entering, and meet the basic needs of high-end electronic packaging, new energy battery sealing and the like.

Description

Technical Field

[0001] This utility model relates to the field of polymer functional film technology, and in particular to an anti-bubble PET film. Background Technology

[0002] Anti-bubble PET film is a thin film made of polyethylene terephthalate (PET) as the substrate. Through structural design, material optimization or process improvement, it can reduce or avoid the generation of bubbles during use. It is widely used in electronics, optics, packaging, new energy and other fields to ensure the stability and performance of bonding, encapsulation and other processes.

[0003] However, existing technologies accelerate air expulsion by reducing adhesive viscosity and adding microgrooves on the adhesive surface. But the intermolecular forces of low-viscosity adhesives are weak, which leads to a decrease in the bonding strength between the film and the substrate. In subsequent use, delamination and edge lifting are likely to occur. Furthermore, the microgrooving structure reduces the actual contact area between the adhesive layer and the substrate, further weakening the adhesion. Especially in complex environments such as high temperature and high humidity, the bonding stability is even worse, making it difficult to meet the long-term adhesion requirements of electronic packaging, optical bonding and other scenarios. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an anti-bubble PET film.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a storage frame, wherein a membrane body is connected to the storage frame via a transmission connection; The membrane body is composed of a PET substrate layer, an inner layer embedded in the PET substrate layer, and a release membrane connected to the inner layer. The PET substrate layer has through holes and air channels. A first glue storage cavity and a second glue storage cavity are slidably connected in the inner layer. A connecting tube is fixedly connected between the first glue storage cavity and the second glue storage cavity. An air vent is opened at the bottom of the release membrane. Liquid vents are opened on the side of the release membrane and the inner layer near the connecting tube. The lower surface of the inner layer is provided with a microcapsule sealing layer that can solidify upon contact with air.

[0006] In a preferred embodiment, an internal groove is formed on the inner layer, and the first and second glue storage cavities are slidably connected inside the inner layer.

[0007] The above technical solution is adopted: during use, an internal groove is provided on the inner layer to facilitate the positioning of the first and second glue storage cavities. The first and second glue storage cavities are held in place by the inner layer and the release film and will not move. The microcapsule sealing layer is encapsulated with ultraviolet light curing adhesive or moisture curing adhesive. The air guiding channel is a recessed groove structure, and the groove structures are interconnected to form a network.

[0008] In a preferred embodiment, the release film has edge holes.

[0009] The above technical solution involves creating edge holes on the release film, which are angled during use to facilitate air extraction.

[0010] In a preferred embodiment, the inner layer is fixedly connected to the release film, and the through holes and air channels penetrate the inner layer and the release film. The inner layer is formed by mixing transparent elastic microspheres (such as micron-sized acrylic or silicone resin microspheres) with transparent UV-curable resin and then curing it by roller pressing with irregular textured surface.

[0011] Using the above technical solution: during use, staff can directly tear off the portion of the second gel storage chamber using external force. In a preferred embodiment, the connecting pipe has an outlet hole.

[0012] The above technical solution allows the outlet hole on the connecting tube to facilitate the overflow of the internal glue.

[0013] In a preferred embodiment, the bottom of the PET substrate layer has an opening that matches the inner layer, and the inner layer is fixedly connected to the opening on the PET substrate layer.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention employs a recessed groove network-like air-guiding channel design, combined with a dual-resin storage cavity, connecting tube, and removable release film structure. During the initial bonding stage, air is rapidly expelled through the air-guiding holes and edge holes, preventing air bubble residue. After the release film is removed, the microcapsule sealing layer on the lower surface of the inner layer ruptures upon contact with air, releasing UV light or moisture-curing adhesive that precisely fills and cures the air-guiding channels, forming a seamless bond. This design maintains air venting efficiency while the precise integration of the elastic microspheres and UV resin inner layer with the PET substrate enhances the bonding strength to ≥5N / cm. Simultaneously, the irregularly textured inner layer strengthens impact resistance. The integrated functions and segmented removable design of the release film are compatible with existing equipment, effectively preventing dust and moisture intrusion and meeting the basic requirements of high-end electronic packaging and new energy battery sealing. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of an anti-bubble PET film provided by this utility model.

[0016] Figure 2 A schematic diagram showing the location of the through holes in an anti-bubble PET film provided by this utility model.

[0017] Figure 3 A schematic diagram showing the location of the air guiding channel in a bubble-proof PET film provided by this utility model.

[0018] Figure 4 A schematic diagram of the rational film position structure of an anti-bubble PET film provided by this utility model.

[0019] Figure 5 This is a schematic diagram showing the overall structure of an anti-bubble PET film provided by this utility model, in its disassembled state.

[0020] Legend: 1. Storage box; 2. Membrane body; 21. Through hole; 22. Gas channel; 23. First adhesive storage cavity; 24. Internal groove; 25. Connecting pipe; 26. Second adhesive storage cavity; 27. PET substrate layer; 28. Internal layer; 29. ​​Release film; 210. Gas vent; 211. Liquid vent; 212. Edge hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 5 As shown, this utility model provides a technical solution: including a storage frame 1, with a membrane body 2 connected to the storage frame 1 via a transmission connection; The membrane body 2 is composed of a PET substrate layer 27, an inner layer 28 embedded in the PET substrate layer 27, and a release membrane 29 connected to the inner layer 28. The PET substrate layer 27 has through holes 21 and air channels 22. The inner layer 28 has a first glue storage cavity 23 and a second glue storage cavity 26 slidably connected. The first glue storage cavity 23 and the second glue storage cavity 26 are fixedly connected by a connecting pipe 25. The bottom of the release membrane 29 has an air channel 210. The release membrane 29 and the inner layer 28 both have liquid channel holes 211 on the side near the connecting pipe 25. The lower surface of the inner layer 28 is provided with a microcapsule sealing layer that can be cured upon contact with air.

[0023] This invention employs a recessed groove network of air channels 22, combined with a dual adhesive storage chamber, a connecting tube 25, and a pull-out release film 29. During the initial bonding stage, air is quickly expelled through the air vents 210 and edge holes 212, preventing air bubbles from remaining. After the release film 29 is removed, the microcapsule sealing layer on the lower surface of the inner layer 28 ruptures upon contact with air, releasing ultraviolet light or moisture-curing adhesive that precisely fills and cures the air channels 22, forming a seamless bond. This design maintains efficient air venting while the precise integration of the elastic microspheres and UV resin in the inner layer 28 with the PET substrate increases the bonding strength to ≥5N / cm. Simultaneously, the irregular textured inner layer 28 enhances impact resistance. The functional integration and segmented pull-out design of the release film 29 adapts to existing equipment, effectively preventing dust and moisture intrusion and meeting the basic requirements of high-end electronic packaging and new energy battery sealing.

[0024] like Figures 2 to 5 As shown, an internal groove 24 is provided on the inner layer 28. The first glue storage cavity 23 and the second glue storage cavity 26 are slidably connected inside the inner layer 28. In use, the internal groove 24 on the inner layer 28 facilitates the limiting of the first glue storage cavity 23 and the second glue storage cavity 26. The first glue storage cavity 23 and the second glue storage cavity 26 are held in place by the inner layer 28 and the release membrane 29 and will not move. The microcapsule sealing layer is encapsulated with ultraviolet light curing adhesive or moisture curing adhesive. The gas guiding channel 22 is a recessed groove structure, and the groove structures are interconnected to form a network.

[0025] like Figure 3 , Figure 4 As shown, the release membrane 29 has an edge hole 212. By having an edge hole 212 on the release membrane 29, the edge hole 212 is set at an angle during use to facilitate the exhaust of air.

[0026] like Figure 5 As shown, the inner layer 28 is fixedly connected to the release membrane 29. The through hole 21 and the air guide channel 22 penetrate the inner layer 28 and the release membrane 29. The inner layer 28 is formed by mixing transparent elastic microspheres (such as micron-sized acrylic or silicone resin microspheres) with transparent UV-curable resin and then pressing and curing it with a roller with irregular textured surface. During use, the operator can directly tear off part of the storage cavity 26 for the second adhesive by external force. like Figures 3 to 4 As shown, the connecting pipe 25 has an outlet hole, which facilitates the overflow of the glue inside.

[0027] like Figures 2 to 5 As shown, the bottom of the PET substrate layer 27 has an opening that matches the inner layer 28, and the inner layer 28 is fixedly connected to the opening on the PET substrate layer 27.

[0028] Working principle: like Figure 1-5 As shown, during use, first place the liquid guiding hole 211 at the upper part of the screen. Then, the operator pinches the second glue reservoir 26 and the first glue reservoir 23, causing the glue in the second glue reservoir 26 and the first glue reservoir 23 to overflow through the connecting tube 25, leak through the inner layer 28 onto the release membrane 29, and then overflow onto the screen through the release membrane 29. The release membrane 29 is folded and flipped onto the screen. Pulling the release membrane 29 causes it to be displaced and detached until the area containing the second glue reservoir 26 is completely exposed outside the screen. The operator can directly tear the air channel 22 with external force to remove the area containing the second glue storage cavity 26 and the first glue storage cavity 23. During this process, after the release film 29 is torn off, the microcapsule sealing layer 3 comes into contact with the air, the capsule breaks and releases the cured adhesive. This adhesive will slowly flow and fill the air channel 22 previously used for venting. Finally, it will be cured under the action of ultraviolet light or air moisture, firmly and seamlessly bonding the entire film surface to the screen, completely sealing the venting channel, preventing dust from entering, and achieving the final high-strength bonding effect.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A bubble-proof PET film, characterized in that, include: Storage frame (1), on which membrane body (2) is connected via transmission; The membrane body (2) is composed of a PET substrate layer (27), an inner layer (28) embedded in the PET substrate layer (27), and a release membrane (29) connected to the inner layer (28). The PET substrate layer (27) has through holes (21) and air channels (22). The inner layer (28) has a first glue storage cavity (23) and a second glue storage cavity (26) slidably connected. A connecting pipe (25) is fixedly connected between the first glue storage cavity (23) and the second glue storage cavity (26). The bottom of the release membrane (29) has an air vent (210). The release membrane (29) and the inner layer (28) both have liquid vents (211) on the side near the connecting pipe (25). The lower surface of the inner layer (28) is provided with a microcapsule sealing layer that can be cured in the presence of air.

2. The anti-bubble PET film according to claim 1, characterized in that: An internal groove (24) is provided on the inner layer (28), and the first glue storage cavity (23) and the second glue storage cavity (26) are slidably connected inside the inner layer (28).

3. The anti-bubble PET film according to claim 1, characterized in that: Edge holes (212) are provided on the release membrane (29) and the inner layer (28).

4. The anti-bubble PET film according to claim 1, characterized in that: The inner layer (28) is connected to the release membrane (29), and the through hole (21) and the air channel (22) penetrate the inner layer (28) and the release membrane (29).

5. The anti-bubble PET film according to claim 1, characterized in that: The connecting pipe (25) has an outlet hole.

6. The bubble-proof PET film according to claim 1, characterized in that: The bottom of the PET substrate layer (27) has an opening that matches the inner layer (28), and the inner layer (28) is fixedly connected to the opening on the PET substrate layer (27).

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