PET (polyethylene terephthalate) high-temperature-resistant release film convenient to strip

Abstract

The utility model relates to the technical field of release films, in particular to a PET (Polyethylene Terephthalate) high-temperature-resistant release film convenient to strip, which comprises a release film, the release film consists of a central winding drum arranged at the central position and a film body wound on the central winding drum, the film body comprises a PET base layer, a high-temperature-resistant base layer is arranged on the outer surface of the PET base layer, and the high-temperature-resistant base layer is arranged on the outer surface of the PET base layer. A high-temperature-resistant bonding layer is arranged on the surface of the high-temperature-resistant base layer, a release layer is arranged on the surface of the high-temperature-resistant bonding layer, a surface protection layer is arranged on the surface of the release layer, and a plurality of reinforcing protrusions are integrally formed on the surface of the high-temperature-resistant base layer and extend into the high-temperature-resistant bonding layer. A plurality of inner grooves are formed in the side face, close to the high-temperature-resistant bonding layer, of the release layer and used for increasing the fixed contact area between the release layer and the high-temperature-resistant bonding layer. The high-temperature-resistant adhesive tape has the effects of convenient stripping and high-temperature-resistant protection, and is beneficial to prolonging the service life.

Description

Technical Field

[0001] This utility model relates to the field of release film technology, and more specifically, to a high-temperature resistant PET release film that is easy to peel off. Background Technology

[0002] PET high-temperature release film is widely used in many fields due to its excellent high-temperature resistance, mechanical properties and chemical stability. In the electronics industry, it is often used to protect circuit boards, semiconductor chips and other materials from contamination during high-temperature welding, coating and other processes. In the packaging industry, it is used to make high-temperature retort pouches.

[0003] However, existing high-temperature resistant PET release films have some problems during use. For example, the peel force between the release film and the protected or coated material is difficult to control precisely. If the peel force is too large, it will be difficult to peel off, which will not only increase the difficulty of production operations, but also easily cause damage or deformation to the surface of the protected material. If the peel force is too small, the release film will easily shift or fall off during processing, affecting product quality and production efficiency.

[0004] To address the aforementioned issues, utility model patent CN220535157U discloses a easily peelable high-temperature resistant PET release film, comprising a film body, a protective layer, and a PET layer. The lower surface of the protective layer has a UV-resistant layer, and the lower surface of the PET layer has a release coating. The upper surface of the protective layer has a high-temperature resistant layer, and an adhesive layer is disposed between the UV-resistant layer and the PET layer. This utility model not only improves the protection of the film body surface through the protective layer but also enhances the high-temperature resistance of the film body through the high-temperature resistant layer. The use of PET film in the PET layer improves the tensile strength and impact resistance of the film body. Furthermore, the release coating facilitates easy peeling of the film body, and the use of UV-resistant film in the UV-resistant layer enhances the UV protection effect of the film body.

[0005] While this technical solution has its advantages, most ET high-temperature release films currently in use consist of multiple layers, with adjacent layers typically in direct contact. This direct contact, especially on smooth material surfaces, can result in weak adhesion, particularly between the release layer, base layer, and adhesive layer. This weak adhesion can lead to detachment of the material layers, affecting the overall performance. Therefore, we propose a PET high-temperature release film that is easy to peel off. Utility Model Content

[0006] The purpose of this invention is to provide a high-temperature resistant PET release film that is easy to peel off, so as to solve the defects mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A PET high-temperature resistant release film that is easy to peel off includes a release film comprising a central roll located at a central position and a film body wrapped around the central roll. The film body includes a PET base layer, a high-temperature resistant base layer disposed on the outer surface of the PET base layer, a high-temperature resistant adhesive layer disposed on the surface of the high-temperature resistant base layer, a release layer disposed on the surface of the high-temperature resistant adhesive layer, a surface protective layer disposed on the surface of the release layer, and multiple reinforcing protrusions integrally formed on the surface of the high-temperature resistant base layer extending into the high-temperature resistant adhesive layer. Multiple inner grooves are disposed on the side of the release layer near the high-temperature resistant adhesive layer, the inner grooves being used to increase the fixed contact area with the high-temperature resistant adhesive layer.

[0009] Preferably, the release film is provided with an outer packaging bag for protecting the release film, and the outer packaging bag has a plurality of tear seams arranged linearly and at equal intervals on its side.

[0010] Preferably, the thickness of the PET base layer is between 25 and 50 μm, and the thickness of the high-temperature resistant adhesive layer is between 2 and 5 μm.

[0011] Preferably, the thickness of the release layer is between 3 and 8 μm, and the thickness of the surface protective layer is between 10 and 20 μm.

[0012] Preferably, an anti-slip layer is provided on the outer surface of the surface protective layer, and the thickness of the anti-slip layer is between 5 and 12 μm;

[0013] This anti-slip layer makes it easier to peel off the surface protective layer later.

[0014] Preferably, an end adhesive is fixedly installed at the end of the membrane, and adhesive is provided on the back of the end adhesive. The end adhesive is used for the end fixing operation of the membrane.

[0015] Preferably, the cross-section of the inner groove is arc-shaped, and the reinforcing protrusion is in the shape of a boss.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model significantly increases the contact area between adjacent material layers by setting an integrally formed reinforcing protrusion on the surface of the high-temperature resistant base layer and extending it into the high-temperature resistant adhesive layer, while designing an inner groove on the side of the release layer. This structural design effectively improves the adhesion and fixing strength between the layers of the release film, avoids the problem of weak adhesion caused by the smooth surface, prevents the material layers from falling off, ensures the stability of the release film structure, and thus ensures its reliability in use.

[0018] 2. This utility model achieves effective protection for the release film by setting an outer packaging bag with a tear-open seam on the outside of the release film. The outer packaging bag can prevent the release film from being contaminated or scratched during transportation and storage, while the tear-open seam design makes it convenient for users to quickly take out the release film, which not only protects the product but also improves the convenience of use.

[0019] 3. This utility model optimizes the user experience of release film by setting an anti-slip layer outside the surface protective layer and installing end adhesive stickers with adhesive at the ends of the film. The anti-slip layer allows users to peel off the surface protective layer more easily, avoiding slippage and operation difficulties; the end adhesive stickers can fix the ends of the film and prevent the film from loosening. The combination of the two makes the release film more convenient to use in practical applications, effectively improving user convenience and satisfaction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the release film of this utility model;

[0022] Figure 3 This is a cross-sectional view of the membrane of this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Outer packaging bag; 10. Tear seam;

[0026] 2. Release film; 20. Central roll; 21. Film body; 211. PET base layer; 212. High temperature resistant base layer; 213. High temperature resistant adhesive layer; 214. Release layer; 215. Surface protective layer; 2151. Anti-slip layer; 22. End adhesive; 23. Reinforcing protrusion; 24. Inner groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0028] Please see Figures 1-4 This utility model provides a technical solution: a PET high-temperature resistant release film that is easy to peel off, including a release film 2. The release film 2 consists of a central roll 20 located at the center and a film body 21 wrapped around the central roll 20, which allows the release film 2 to be wound in an orderly manner during storage and transportation, making it convenient to store and retrieve. The central roll 20 provides support to ensure that the film body 21 will not loosen or deform, which facilitates continuous operation and use in industrial production and improves the convenience and efficiency of using the release film 2.

[0029] In this embodiment, the membrane 21 includes a PET base layer 211, which is also made of a high-temperature resistant material. A high-temperature resistant base layer 212 is provided on the outer surface of the PET base layer 211. The high-temperature resistant base layer 212 can perform high-temperature protection operations and provide an assembly environment for the subsequent high-temperature resistant adhesive layer 213.

[0030] Specifically, a high-temperature resistant adhesive layer 213 is disposed on the surface of the high-temperature resistant base layer 212, a release layer 214 is disposed on the surface of the high-temperature resistant adhesive layer 213, and a surface protective layer 215 is disposed on the surface of the release layer 214. Multiple reinforcing protrusions 23 are integrally formed on the surface of the high-temperature resistant base layer 212, extending into the high-temperature resistant adhesive layer 213. Multiple inner grooves 24 are disposed on the side of the release layer 214 near the high-temperature resistant adhesive layer 213. The inner grooves 24 are used to increase the fixed contact area with the high-temperature resistant adhesive layer 213, significantly increasing the contact area between the high-temperature resistant base layer 212, the high-temperature resistant adhesive layer 213, and the release layer 214. This structural design enhances the adhesion and fixation between the layers, preventing material layer detachment due to weak interlayer adhesion, and ensuring the stability and performance of the release film 2 structure.

[0031] like Figure 1 As shown, the release film 2 is surrounded by an outer packaging bag 1 for protection. Multiple linearly spaced tear slits 10 are provided on the side of the outer packaging bag 1 to effectively protect the release film 2 during storage and transportation, preventing damage such as contamination and scratches. The tear slits 10 design allows users to quickly and accurately open the outer packaging bag 1 and retrieve the release film 2, improving operational convenience and efficiency.

[0032] Furthermore, the thickness of the PET base layer 211 is between 25 and 50 μm, the thickness of the high-temperature resistant adhesive layer 213 is between 2 and 5 μm, the thickness of the release layer 214 is between 3 and 8 μm, and the thickness of the surface protective layer 215 is between 10 and 20 μm. This suitable thickness range ensures that the release film 2 possesses good mechanical properties, high-temperature resistance, release properties, and protective properties while maintaining the overall thinness of the structure. The appropriate thickness ensures that each layer of material functions fully, improving the overall performance and effectiveness of the release film 2.

[0033] It is worth noting that an anti-slip layer 2151 is provided on the outer surface of the surface protective layer 215. The thickness of the anti-slip layer 2151 is between 5 and 12 μm, making it easier to peel off the surface protective layer 215 during use. The anti-slip layer 2151 increases surface friction, making it easier for users to grip and operate, avoiding the difficulty in peeling off the protective layer due to a smooth surface, and improving the convenience and user experience of using the release film 2.

[0034] like Figure 2 As shown, an end adhesive label 22 is fixedly installed at the end of the membrane body 21. Adhesive is provided on the back of the end adhesive label 22. The end adhesive label 22 is used to fix the end of the membrane body 21, ensuring that the end of the membrane body 21 is firmly fixed in the wound state. The end adhesive label 22 prevents the membrane body 21 from loosening or spreading during storage and transportation, ensuring the integrity and orderliness of the release film 2, and facilitating subsequent retrieval and use.

[0035] like Figure 4 As shown, the cross-section of the inner groove 24 is arc-shaped, and the reinforcing protrusion 23 is in the shape of a boss, which allows for more even distribution of stress when enhancing interlayer bonding. This shape design avoids stress concentration, further improving the stability and reliability of the bonding between layers, while also helping to better achieve the adhesion and molding of each layer of material during the production process.

[0036] It is worth noting that the PET base layer 211 uses a biaxially stretched PET film as the base layer. The biaxial stretching treatment makes the mechanical properties of the PET film more uniform in the transverse and longitudinal directions, improving the tensile strength, tear strength and dimensional stability of the release film. It can withstand stress changes during high-temperature processing, preventing deformation and cracking of the release film, and achieving the effect of initial high-temperature protection. The high-temperature resistant adhesive layer 213 can be made of silicone-modified acrylic resin as the main raw material, with the addition of high-temperature resistant fillers and coupling agents. The silicone-modified acrylic resin combines the high-temperature resistance of silicone materials with the good adhesive properties of acrylic resin, and can maintain stable adhesion in high-temperature environments. The release layer 214 can be made of fluorinated silicone polymer as the main raw material, formed through a special coating process. The fluorinated silicone polymer has extremely low surface energy, which can effectively reduce the adhesion between the release film and the protected material or coating material, achieving the effect of easy peeling.

[0037] In this embodiment, the surface protective layer 215 can be a peelable polyvinyl alcohol film. During the storage, transportation, and processing of the release film, the surface protective layer 215 protects the surface of the release layer 214, preventing contamination and scratches, and ensuring that the release performance of the release film is not affected. In use, the surface protective layer 215 can be easily peeled off for convenient application.

[0038] When using the easy-to-peel PET high-temperature resistant release film of this utility model, first open the packaging along the tear seam 10 on the side of the outer packaging bag 1, take out the release film 2 wound on the central roll 20, peel off the end adhesive 22 according to the usage requirements, unfold the film body 21 for use, at this time, peel off the surface protective layer 215, and the release film 2 is exposed and can be used normally.

[0039] During application, the PET base layer 211 of the release film 2, with its excellent mechanical properties after biaxial stretching, can withstand the stress during processing. The high-temperature resistant base layer 212 and the high-temperature resistant adhesive layer 213 work together to resist high temperatures and ensure the stability of the release film performance. The release layer 214, relying on the low surface energy characteristics of the fluorinated organosilicon polymer, can easily peel the release film off the protected material or coating material after processing.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A PET high-temperature resistant release film that is easy to peel off, comprising a release film (2), characterized in that: The release film (2) consists of a central roll (20) located at the center and a film body (21) surrounding the central roll (20). The film body (21) includes a PET base layer (211). A high-temperature resistant base layer (212) is provided on the outer surface of the PET base layer (211). A high-temperature resistant adhesive layer (213) is provided on the surface of the high-temperature resistant base layer (212). A release layer (214) is provided on the surface of the high-temperature resistant adhesive layer (213). A surface protective layer (215) is provided on the surface of the release layer (214). Multiple reinforcing protrusions (23) are integrally formed on the surface of the high-temperature resistant base layer (212). The reinforcing protrusions (23) extend into the high-temperature resistant adhesive layer (213). Multiple inner grooves (24) are provided on the side of the release layer (214) near the high-temperature resistant adhesive layer (213). The inner grooves (24) are used to increase the fixed contact area with the high-temperature resistant adhesive layer (213).

2. The easily peelable high-temperature resistant PET release film according to claim 1, characterized in that: The release film (2) is provided with an outer packaging bag (1) for protecting the release film (2), and the outer packaging bag (1) has a plurality of tear seams (10) arranged linearly and equally spaced on the side.

3. The easily peelable high-temperature resistant PET release film according to claim 1, characterized in that: The thickness of the PET base layer (211) is between 25 and 50 μm, and the thickness of the high-temperature resistant adhesive layer (213) is between 2 and 5 μm.

4. The easily peelable high-temperature resistant PET release film according to claim 1, characterized in that: The thickness of the release layer (214) is between 3 and 8 μm, and the thickness of the surface protective layer (215) is between 10 and 20 μm.

5. The easily peelable high-temperature resistant PET release film according to claim 1, characterized in that: An anti-slip layer (2151) is provided on the outer surface of the surface protective layer (215), and the thickness of the anti-slip layer (2151) is between 5 and 12 μm.

6. The easily peelable high-temperature resistant PET release film according to claim 1, characterized in that: An end adhesive sticker (22) is fixedly installed at the end of the membrane (21). Adhesive is provided on the back of the end adhesive sticker (22). The end adhesive sticker (22) is used for the end fixing operation of the membrane (21).

7. The easily peelable high-temperature resistant PET release film according to claim 1, characterized in that: The cross-section of the inner groove (24) is arc-shaped, and the reinforcing protrusion (23) is in the shape of a boss.

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