Anti-wrinkle multifunctional composite release film

Abstract

The utility model discloses an anti-wrinkle multifunctional composite release film which comprises a flexible base material layer, a protective layer, a release layer, a heat-resistant adhesion layer, an upper rigid resin layer, a lower rigid resin layer, a carbonized film layer and a PTFE (Polytetrafluoroethylene) film layer, the protective layer, the release layer, the heat-resistant adhesive layer, the upper rigid resin layer, the flexible base material layer, the lower rigid resin layer, the carbonized film layer and the PTFE film layer are sequentially attached from top to bottom. The adhesive tape has certain flexibility and elasticity so as to meet the stretching and curling requirements of an adhesive product, is good in high-temperature-resistant effect, not prone to deformation or shrinkage under the high-temperature or high-humidity condition, capable of avoiding the wrinkling phenomenon, good in anti-wrinkling effect, capable of ensuring the smoothness of the product, good in heat conductivity, capable of better improving the high-temperature-resistant effect and capable of improving the product quality. In the long-time product attaching process, dust can be effectively prevented from polluting adhesive products, the situation that when the environment humidity is large, moisture influences the viscosity of an adhesive layer is avoided, and the adhesive has multiple functions and is good in protection effect and comprehensive performance.

Description

Technical Field

[0001] The utility model relates to the technical field of release films, in particular to an anti-wrinkle multifunctional composite release film. Background Art

[0002] Release film is also called peeling film, isolation film, separation film, adhesive barrier film, release film, film, plastic film, masking film, silicone oil film, silicone oil paper, anti-adhesive film, mold paper, slip film, thinner paper or release paper, etc. Release film refers to a film with a separable surface. After the release film comes into contact with a specific material under limited conditions, it will not be sticky or will be slightly sticky.

[0003] In the production process of adhesive products or oven-baked products (silicone sheets), a release film is required as a protective layer for the bottom. If the release film is deformed or shrunk under high temperature or high humidity, it will cause wrinkles in the release film, which will affect the quality of the adhesive product and leave lines on the adhesive layer. Therefore, the release film needs to maintain surface stiffness to avoid wrinkles when used as a bottom protective layer. At the same time, the base layer of the release film needs to have a certain degree of softness and be able to maintain a certain degree of elasticity so that it can stretch and curl on the production guide roller with the adhesive product. Therefore, it is necessary to develop a wrinkle-resistant, soft and elastic anti-wrinkle multifunctional composite release film with good high temperature resistance. Utility Model Content

[0004] In view of the above-mentioned deficiencies, the utility model aims to provide an anti-wrinkle multifunctional composite release film which has a reasonable structural design, is anti-wrinkle, has both softness and elasticity, and has good high temperature resistance.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A wrinkle-resistant multifunctional composite release film comprises a flexible substrate layer, a protective layer, a release layer, a heat-resistant adhesion layer, an upper rigid resin layer, a lower rigid resin layer, a carbonized film layer and a PTFE film layer, wherein the protective layer, the release layer, the heat-resistant adhesion layer, the upper rigid resin layer, the flexible substrate layer, the lower rigid resin layer, the carbonized film layer and the PTFE film layer are sequentially laminated from top to bottom.

[0007] As a preferred solution of the utility model, the flexible substrate layer is a PDMS film, a PVA film or a TPU film with a thickness of 10 to 30 microns.

[0008] As a preferred solution of the utility model, the protective layer is a PE film, a BOPP film or a PC film with a thickness of 50 to 90 microns.

[0009] As a preferred solution of the utility model, the release layer is a 2-4 micron polyether modified silicone oil coating, an octamethyltrisiloxane coating or a polydiethylsiloxane coating, which has a good peeling effect.

[0010] As a preferred solution of the utility model, the heat-resistant adhesion layer is a furan resin layer or a polysulfone resin layer with a thickness of 5 to 10 microns, which has good rigidity and toughness, and has good chemical resistance and heat resistance.

[0011] As a preferred embodiment of the present invention, the upper rigid resin layer or the lower rigid resin layer is an octylphenol formaldehyde resin layer, a butanol-modified urea-formaldehyde resin layer and a bisphenol A epoxy resin layer with a thickness of 2 to 6 microns, and has good strength, rigidity and temperature resistance.

[0012] As a preferred solution of the utility model, the carbonized film layer has a thickness of 60 to 150 microns and is formed by high-temperature sintering of a PI film, has good thermal conductivity, and improves high-temperature resistance.

[0013] As a preferred solution of the utility model, the thickness of the PTFE film layer is 60 to 150 microns, has good hydrophobicity, and is good in anti-fog effect.

[0014] The beneficial effects of the utility model are as follows: the utility model has a reasonable structural design, and through the coordination of each layer structure, it has a certain softness and elasticity to meet the stretching and curling requirements of the adhesive product, and has good high temperature resistance. It is not easy to deform or shrink under high temperature or high humidity conditions, thus avoiding the occurrence of wrinkles, and has good anti-wrinkle effect, ensuring the flatness of the product; and the carbonized film layer has high thermal conductivity, which can further enhance the high temperature resistance effect, and the PTFE film layer has good hydrophobicity and good anti-fog effect. During the long-term bonding process with the product, it can effectively prevent dust from contaminating the adhesive product and avoid moisture affecting the viscosity of the adhesive layer when the ambient humidity is high. It has multiple functions and good protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model. DETAILED DESCRIPTION

[0016] Example 1: See Figure 1 The embodiment of the utility model provides an anti-wrinkle multifunctional composite release film, which includes a protective layer 1, a release layer 2, a heat-resistant adhesion layer 3, an upper rigid resin layer 4, a flexible substrate layer 5, a lower rigid resin layer 6, a carbonized film layer 7 and a PTFE film layer 8 which are sequentially laminated from top to bottom.

[0017] In this embodiment, the flexible substrate layer 5 is preferably a PDMS film with a thickness of 15 microns, a light transmittance of 95%, and a haze of 1.5%. The protective layer 1 is preferably a PE film with a thickness of 50 microns. The release layer 2 is preferably a 2-micron octamethyltrisiloxane coating, that is, octamethyltrisiloxane is coated on the heat-resistant adhesion layer 3 by a micro-concave roller and cured, and the curing temperature is 130 degrees. The heat-resistant adhesion layer 3 is preferably a furan resin layer with a thickness of 5 microns. The upper rigid resin layer 4 and the lower rigid resin layer 6 are preferably octylphenol formaldehyde resin layers with a thickness of 3 microns, that is, octylphenol formaldehyde resin is coated on the upper and lower surfaces of the flexible substrate layer 5 using a comma scraper. The thickness of the carbonized film layer 7 is preferably 100 microns, which is sintered by high-temperature PI film and has good thermal conductivity. The thickness of the PTFE film layer 8 is preferably 100 microns.

[0018] Embodiment 2: The embodiment of the utility model provides an anti-wrinkle multifunctional composite release film, which has basically the same structure as that of embodiment 1, except that the flexible substrate layer 5 is preferably a PVA film with a thickness of 25 microns, a light transmittance of 97%, and a haze of 2.0%. The protective layer 1 is preferably a PC film with a thickness of 75 microns. The release layer 2 is preferably a 3-micron polydiethylsiloxane coating, that is, polydiethylsiloxane is coated on the heat-resistant adhesion layer 3 by a micro-concave roller and cured, and the curing temperature is 145 degrees. The heat-resistant adhesion layer 3 is preferably a furan resin layer with a thickness of 8 microns. The upper rigid resin layer 4 and the lower rigid resin layer 6 are preferably bisphenol A epoxy resin layers with a thickness of 5 microns, that is, bisphenol A epoxy resin is coated on the upper and lower surfaces of the flexible substrate layer 5 using a comma scraper. The thickness of the carbonized film layer 7 is preferably 70 microns. The thickness of the PTFE film layer 8 is preferably 120 microns.

[0019] Embodiment 3: The embodiment of the utility model provides an anti-wrinkle multifunctional composite release film, which has basically the same structure as that of Embodiment 1, except that the flexible substrate layer 5 is preferably a TPU film with a thickness of 10 microns. The protective layer 1 is preferably a PE film with a thickness of 50 microns. The release layer 2 is preferably a 2-micron polyether-modified silicone oil coating. The heat-resistant adhesion layer 3 is preferably a polysulfone resin layer with a thickness of 5 microns. The upper rigid resin layer 4 and the lower rigid resin layer 6 are preferably octylphenol formaldehyde resin layers with a thickness of 2 microns. The thickness of the carbonized film layer 7 is preferably 60 microns. The thickness of the PTFE film layer 8 is preferably 60 microns.

[0020] Embodiment 4: The embodiment of the utility model provides an anti-wrinkle multifunctional composite release film, which has basically the same structure as that of Embodiment 1, except that the flexible substrate layer 5 is preferably a PDMS film with a thickness of 30 microns. The protective layer 1 is preferably a BOPP film with a thickness of 90 microns. The release layer 2 is preferably a 4-micron octamethyltrisiloxane coating. The heat-resistant adhesion layer 3 is preferably a furan resin layer with a thickness of 10 microns. The upper rigid resin layer 4 and the lower rigid resin layer 6 are preferably butanol-modified urea-formaldehyde resin layers with a thickness of 6 microns. The thickness of the carbonized film layer 7 is preferably 150 microns. The thickness of the PTFE film layer 8 is preferably 150 microns.

[0021] The above embodiments are only the better implementation methods of the utility model. The utility model cannot list all the implementation methods one by one. Any technical solution using one of the above embodiments, or equivalent changes made according to the above embodiments, are within the protection scope of the utility model. The utility model has a certain softness and elasticity to meet the stretching and curling requirements of adhesive products, and has good high temperature resistance. It is not easy to deform or shrink under high temperature or high humidity conditions, which avoids the appearance of wrinkles, has good anti-wrinkle effect, ensures the flatness of the product, and has good thermal conductivity, which can further improve the high temperature resistance effect. During the long-term bonding process with the product, it can effectively prevent dust from contaminating the adhesive product and avoid moisture affecting the viscosity of the adhesive layer when the ambient humidity is high, and has a good protection effect.

[0022] According to the disclosure and teaching of the above specification, technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementations disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model. Other membranes that are the same or similar to them are all within the scope of protection of the utility model.

Claims

1. A wrinkle-resistant multifunctional composite release film, comprising a flexible substrate layer, characterized in that: It also includes a protective layer, a release layer, a heat-resistant adhesion layer, an upper rigid resin layer, a lower rigid resin layer, a carbonized film layer and a PTFE film layer, and the protective layer, the release layer, the heat-resistant adhesion layer, the upper rigid resin layer, the flexible substrate layer, the lower rigid resin layer, the carbonized film layer and the PTFE film layer are sequentially laminated in order from top to bottom.

2. The anti-wrinkle multifunctional composite release film according to claim 1, characterized in that: The protective layer is a PE film, a BOPP film or a PC film with a thickness of 50 to 90 microns.

3. The anti-wrinkle multifunctional composite release film according to claim 1, characterized in that: The release layer is a 2-4 micron polyether modified silicone oil coating, an octamethyl trisiloxane coating or a polydiethylsiloxane coating.

4. The anti-wrinkle multifunctional composite release film according to claim 1, characterized in that: The heat-resistant adhesion layer is a furan resin layer or a polysulfone resin layer with a thickness of 5 to 10 microns.

5. The anti-wrinkle multifunctional composite release film according to claim 1, characterized in that: The upper rigid resin layer or the lower rigid resin layer is an octylphenol formaldehyde resin layer, a butanol modified urea formaldehyde resin layer and a bisphenol A epoxy resin layer with a thickness of 2 to 6 microns.

6. The anti-wrinkle multifunctional composite release film according to claim 1, characterized in that: The thickness of the carbonized film layer is 60 to 150 microns.

7. The anti-wrinkle multifunctional composite release film according to claim 1, characterized in that: The thickness of the PTFE film layer is 60 to 150 microns.

8. The anti-wrinkle multifunctional composite release film according to any one of claims 1 to 7, characterized in that: The flexible substrate layer is a PDMS film, a PVA film or a TPU film with a thickness of 10 to 30 microns.

Images