Release film with high light transmittance

Abstract

The utility model belongs to the technical field of industrial films, and particularly relates to a high-light-transmittance release film which comprises a base layer made of a PET (Polyethylene Terephthalate) material; the light-transmitting layer is arranged on one side of the base layer, and a protective layer is arranged on one side of the light-transmitting layer and used for protecting the base layer and the light-transmitting layer; the release layer is arranged on the side, away from the light transmitting layer, of the base layer. According to the release film, the overall light transmittance of the film body can be effectively improved through the release layer added with the special optical conductive filler, so that the requirement for fitting use in various high-precision scenes is met, meanwhile, the effective anti-ultraviolet capacity is provided through the light transmitting layer, and external sunlight is prevented from damaging the fitting face and the film body.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial films, and in particular relates to a release film with high light transmittance. Background Art

[0002] With the rapid development of global technology, especially in the fields of optoelectronic display, touch technology, solar cells and precision bonding, the demand for release films is increasing, especially for high-end applications that require high transparency, long life and excellent performance.

[0003] In the prior art, for example, the Chinese publication number CN113861878B discloses a "high-temperature resistant protective film". Although release films have been widely used in various industrial fields, they often suffer from problems such as insufficient light transmittance, poor UV resistance, and performance degradation in extreme environments. These defects limit their application range and service life, especially for electronic products that require long-term outdoor use.

[0004] Therefore, it is necessary to design a new solution to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a release film with high light transmittance, aiming to solve the technical problem that it is difficult to provide high light transmittance and UV resistance in the prior art.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a high-transmittance release film, including: a base layer, the base layer is made of PET material; a light-transmitting layer, the light-transmitting layer is arranged on one side of the base layer, and a protective layer is provided on one side of the light-transmitting layer for protecting the base layer and the light-transmitting layer; a release layer, the release layer is arranged on the side of the base layer away from the light-transmitting layer.

[0007] Furthermore, the base layer is made of PET material with a light transmittance of not less than 92%, and the thickness of the base layer is between 50 μm and 100 μm.

[0008] Furthermore, the protective layer is made of a silicone resin mixture, wherein the ratio between silicone and resin is 1:1, and the protective layer is made by ultraviolet curing process, and the thickness of the protective layer is about 1μm-3μm.

[0009] Furthermore, the release layer is made by a reverse coating process, and the thickness difference between the high point and the low point of the release layer is within the range of ±3%.

[0010] Furthermore, the release layer is cured using a step-by-step temperature control curing technology, wherein the first round of curing is performed at 60° C. for 2 minutes, and the second round of curing is performed at 120° C. for 3 minutes.

[0011] Furthermore, a plurality of conductive particles are provided inside the release layer, the conductive particles are made of ITO nanoparticle material, and the diameter of the conductive particles does not exceed 30 nm.

[0012] Furthermore, the light-transmitting layer contains a light stabilizer and a cross-linking agent, wherein the cross-linking agent is preferably a light-curable acrylate monomer.

[0013] Furthermore, a plurality of connection points are provided on the top of the base layer, and the base layer is fitted with the release layer through the plurality of connection points.

[0014] The above one or more technical solutions in the high-transmittance release film provided by the embodiment of the present invention have at least one of the following technical effects: the release layer with added special optical conductive fillers can effectively improve the overall transmittance of the film body, so as to meet the needs of various high-precision scenes for bonding, and at the same time, the light-transmitting layer provides effective anti-ultraviolet radiation ability to prevent external sunlight from damaging the bonding surface and the film body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 A schematic diagram of the overall structure of the membrane provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic structural diagram of a release layer provided in an embodiment of the present utility model;

[0018] Among them, the reference numerals in the figures are: 1-base layer; 101-connection point; 2-light-transmitting layer; 3-release layer; 301-conductive particles; 4-protective layer. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0023] In one embodiment of the present invention, Figure 1-Figure 2 As shown, a high-transmittance release film is provided, including: a base layer 1, which is made of PET material; a light-transmitting layer 2, which is arranged on one side of the base layer 1, and a protective layer 4 is provided on one side of the light-transmitting layer 2 to protect the base layer 1 and the light-transmitting layer 2; a release layer 3, which is arranged on the side of the base layer 1 away from the light-transmitting layer 2. During use, the protective layer 4 and the light-transmitting layer 2 are used to provide protection on one side of the base layer 1 and ensure the overall light transmittance of the film. While ensuring the light transmittance, the release layer 3 is used for adhesion to ensure the overall basic function of the release film.

[0024] Furthermore, the base layer 1 is made of PET material with a transmittance of not less than 92%, and the thickness of the base layer 1 is between 50μm and 100μm. Using PET material with high transmittance to make the base layer 1 can provide good light transmittance and ensure the overall cleaning of the film, and the lower thickness can also make the overall light transmittance stronger.

[0025] Furthermore, the protective layer 4 is made of a silicone resin mixture, wherein the ratio between silicone and resin is 1:1, and the protective layer 4 is made by a UV curing process. The thickness of the protective layer 4 is about 1 μm-3 μm. The self-healing property of the silicone resin mixture is utilized. As the protective layer 4, it not only improves the physical protection properties of the diaphragm, such as wear resistance and scratch resistance, but also maintains high transparency, so that the product still maintains good appearance and performance under frequent use and exposure to the external environment.

[0026] Furthermore, the release layer 3 is made by a reverse coating process, and the thickness difference between the high point and the low point of the release layer 3 is within the range of ±3%. During the processing, reverse coating and high-precision control of the thickness difference are used to ensure the overall uniformity of the coating, reduce light scattering and performance fluctuations caused by uneven thickness, and improve the overall quality and consistency of the product.

[0027] Furthermore, the release layer 3 is cured using a step-by-step temperature control curing technology, wherein the first round of curing is performed at 60°C for 2 minutes, and the second round of curing is performed at 120°C for 3 minutes. The use of step-by-step temperature control curing can effectively relieve the internal stress of the material, avoid deformation and defect formation during the heat treatment process, such as bubbles and wrinkles, ensure the flatness and optical uniformity of the release film, and improve the aesthetics and performance of the release film.

[0028] Furthermore, a plurality of conductive particles 301 are provided inside the release layer 3. The conductive particles are made of ITO nanoparticle material, and the diameter of the conductive particles 301 does not exceed 30 nm. The uniform dispersion of ITO nanoparticles not only enhances the optical conductivity of the film, but also avoids light scattering, thereby further improving the transmittance to ≥95%, which is particularly important when protecting high-definition display screens and touch screens.

[0029] Furthermore, the light-transmitting layer 2 contains a light stabilizer and a cross-linking agent, wherein the cross-linking agent is preferably a light-curable acrylate monomer. During use, the stabilizer and the cross-linking agent are cured to form an anti-ultraviolet network. In this anti-ultraviolet network, the protective layer 4 can effectively block the invasion of external ultraviolet rays, improve the protection ability of the release film, and at the same time extend the service life of the electronic devices to which it is attached, reducing the occurrence of performance degradation caused by ultraviolet rays.

[0030] Furthermore, a plurality of connection points 101 are provided on the top of the base layer 1, and the base layer 1 is fitted with the release layer 3 through the plurality of connection points 101. The plurality of connection points on the top of the base layer 1 can increase the contact and fitting surface between the base layer 1 and the release layer 3. This method can make the adhesion between the base layer 1 and the release layer 3 more stable.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high light transmittance release film, characterized in that: include: A base layer (1), wherein the base layer (1) is made of PET material; A light-transmitting layer (2), the light-transmitting layer (2) being provided on one side of the base layer (1), and a protective layer (4) being provided on one side of the light-transmitting layer (2) for protecting the base layer (1) and the light-transmitting layer (2); A release layer (3), the release layer (3) being arranged on a side of the base layer (1) away from the light-transmitting layer (2).

2. The high light transmittance release film according to claim 1, wherein: The base layer (1) is made of PET material with a light transmittance of not less than 92%, and the thickness of the base layer (1) is between 50 μm and 100 μm.

3. The high light transmittance release film according to claim 1, wherein: The protective layer (4) is made of a silicone resin mixture, and the protective layer (4) is made using an ultraviolet light curing process. The thickness of the protective layer (4) is 1 μm-3 μm.

4. The high light transmittance release film according to claim 1, wherein: The release layer (3) is manufactured by a reverse coating process, and the thickness difference between the high point and the low point of the release layer (3) is within the range of ±3%.

5. The high light transmittance release film according to claim 1, wherein: The release layer (3) is cured using a step-by-step temperature control curing technology, wherein the first round of curing is performed at 60° C. for 2 minutes, and the second round of curing is performed at 120° C. for 3 minutes.

6. The high light transmittance release film according to claim 1, wherein: A plurality of conductive particles (301) are provided inside the release layer (3), the conductive particles are made of ITO nanoparticle material, and the diameter of the conductive particles (301) does not exceed 30 nm.

7. The high light transmittance release film according to claim 1, wherein: The light-transmitting layer (2) contains a light stabilizer and a cross-linking agent, wherein the cross-linking agent is a light-curable acrylate monomer.

8. The high light transmittance release film according to claim 1, wherein: A plurality of connection points (101) are provided on the top of the base layer (1), and the base layer (1) is fitted with the release layer (3) via the plurality of connection points (101).

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