CN214688339U

CN214688339U - Release film for OCA (optical clear adhesive)

Info

Publication number: CN214688339U
Application number: CN202023297473.2U
Authority: CN
Inventors: 顾长均; 邓浩鹏
Original assignee: Dongguan Dingli Film Technology Co ltd
Current assignee: Dongguan Dingli Film Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-12
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a OCA glues with leaving type membrane, it includes the substrate layer the upper and lower surface from interior to exterior of substrate layer is equipped with in proper order corona layer, anti-aging layer, transparent conducting layer, leave type layer and protective layer. The utility model discloses rationally select for use BOPP antifog coating film, BOPP high definition crystal film, LDPE film or PO membrane to be the protective layer, outside dustproof and the anti-scratch function that not only has traditional protection film, still possess and prevent steam and form the function that the fogging influences the transparency on the film surface, effectively avoided from type the film have steam to condense after high low temperature changes from the type membrane surface, ensure transparency and stripping off the performance. Transparent conducting layer has simultaneously prevents static effect, prevents to adsorb dust or other granule foreign matters, and anti-aging layer can reduce OCA and glue and receive external oxygen, ozone and ultraviolet destruction, under the condition of high temperature and insolate, can prolong the life who leaves type membrane and OCA and glue, does benefit to extensive popularization and application.

Description

Release film for OCA (optical clear adhesive)

Technical Field

The utility model relates to a from type membrane technical field, in particular to OCA is glued with from type membrane.

Background

The release film refers to a film having a surface with separability, and the release film is not sticky or slightly sticky after being contacted with a specific material under limited conditions. The release film is also called as a release film, a barrier film, a separation film, a glue-blocking film, a release film, a plastic film, a hole-masking film, a silicon oil paper, an anti-sticking film, a molded paper, a slip film, a Tianna paper or a release paper, etc.

The electronic optical adhesive (OCA) is a clean high-transparency double-sided adhesive tape without a base material, has excellent transparency, high clarity and high light transmittance, has the light transmittance of more than 92 percent, and simultaneously has high adhesion. The optical grade OCA film structure consists of: the release film layer, the OCA glue layer and the release film layer are compounded. The release films are respectively attached to the upper surface and the lower surface of the OCA optical adhesive layer. The adhesive is suitable for adhering plastic materials such as polycarbonate and the like under the conditions of strong light irradiation and high temperature and high humidity, is mainly used for adhering a substrate (a capacitive screen and a resistive screen) of a touch screen and a front panel at present, is widely used in smart phones, handwriting computers and touch screen multimedia machines, and has a wide market.

After the electronic optical adhesive (OCA) is made into a product, some electronic optical adhesive (OCA) needs to be exported overseas or stored for 1-2 years, the storage environments are different, and some electronic optical adhesive (OCA) is stored in a high-temperature and high-humidity environment. In an exposure environment, the electronic optical adhesive is required to have excellent antioxidant, ozone and ultraviolet functions; therefore, the release film, which is one of the Optical Clear Adhesive (OCA) compositions, must have oxygen, ozone and ultraviolet resistance to protect the Optical Clear Adhesive (OCA) properties. The traditional release film does not have a composite layer with antioxidant performance, ozone performance and ultraviolet performance, and for maintaining the characteristics of the electronic optical adhesive (OCA) for a long time, enterprises usually refrigerate the electronic optical adhesive (OCA) in a low-temperature environment below 5 ℃, after products are taken out from a low-temperature refrigeration house, water mist is formed on the surface of the electronic optical adhesive (OCA) film or even on the inner layer of the electronic optical adhesive (OCA) film, so that the transparency and the bonding performance of the OCA are affected, and meanwhile, in humid periods such as spring, the water vapor can slowly permeate into the inner layer of the electronic optical adhesive (OCA) product through the release film layer, so that the bonding performance of the OCA is affected, and the high-transparency OCA composite material is fogged.

In order to prevent water mist from condensing on the surface of an electronic optical adhesive (OCA) product or permeating into an inner layer, the development of an antifogging OCA release film is the research and development direction of the industry.

SUMMERY OF THE UTILITY MODEL

To the above, the utility model aims to provide a structural design is ingenious, reasonable, and OCA that has antifog effect is glued with from type membrane.

The utility model discloses a realize above-mentioned purpose, the technical scheme that provides is: a release film for OCA glue comprises a substrate layer, a release layer, a protective layer, a transparent conductive layer, an anti-aging layer and a corona layer, the upper surface and the lower surface of the substrate layer are sequentially provided with the corona layer, the anti-aging layer, the transparent conducting layer, the release layer and the protective layer from inside to outside, the protective layer is a BOPP antifogging film, a BOPP high-definition crystal film, an LDPE film or a PO film, the protective layer is a BOPP anti-fog film, a BOPP high-definition crystal film, an LDPE film or a PO film, has the functions of dust prevention and scratch prevention of the traditional protective film, also has the function of preventing water vapor from forming fog on the surface of the film to influence the transparency, effectively prevents the water vapor from condensing on the surface of the release film after the release film changes at high and low temperatures, ensures the transparency and the stripping performance, in humid seasons such as spring, can prevent water smoke infiltration, ensure the laminating performance of OCA glue, avoid the high transparent OCA combined material condition of hazing to appear.

As an improvement of the utility model, the release layer is a thin film layer formed by curing dimethyl silicone oil or ethyl silicone oil or ethoxy silicone oil or phenyl silicone oil.

As an improvement of the utility model, the substrate layer is PET, PP, PVC or PE with the thickness of 25-75 microns.

As an improvement of the utility model, the transparent conductive layer is a PEDOT/PSS conductive film with a thickness of 3-6 microns, which has an antistatic effect and prevents dust or other particle foreign matters from being adsorbed.

As an improvement of the utility model, the anti-aging layer is a silicon rubber film with the thickness of 25-75 microns. The release film has the functions of resisting oxygen, ozone and ultraviolet rays, can reduce the damage of the OCA caused by external oxygen, ozone and ultraviolet rays after the release film is attached to the OCA glue, and can prolong the service life of the release film and the OCA glue under the conditions of high temperature and insolation. In addition, the environment-friendly material is an environment-friendly material, and cannot cause huge pollution to the environment after being used.

As an improvement of the utility model, the thickness on corona layer is 1 ~ 2 microns, effectively strengthens adhesion, prevents that the layering from breaking away from, improves combined material's stability.

The utility model has the advantages that: the utility model discloses rationally select for use BOPP antifog coating film, BOPP high definition crystal film, LDPE film or PO membrane are the protective layer, outside dustproof and the anti-scratch function that not only has traditional protection film, still possess and prevent steam and form the function that the fogging influenced the transparency on the film surface, effectively avoided from having steam to condense after the high low temperature change from the type membrane surface, ensure transparency and stripping performance, in humid seasons such as spring, can prevent water smoke infiltration, ensure the laminating performance that OCA glued, avoid the high transparent OCA combined material the condition that fogging appears. Transparent conducting layer has simultaneously prevents static effect, prevents to adsorb dust or other granule foreign matters, and anti-aging layer can reduce OCA and glue and receive external oxygen, ozone and ultraviolet destruction, under the condition of high temperature and insolate, can prolong the life who leaves type membrane and OCA and glue, does benefit to extensive popularization and application.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Detailed Description

Example (b): referring to fig. 1, the embodiment of the utility model provides a OCA glues with leaving type membrane, it includes substrate layer 1, leaves type layer 2, protective layer 3, transparent conducting layer 4, anti-aging layer 5 and corona layer 6, substrate layer 1's upper and lower surface from interior to exterior is equipped with in proper order corona layer 6, anti-aging layer 5, transparent conducting layer 4, from type layer 2 and protective layer 3.

The base material layer 1 is made of PET, PP, PVC or PE with the thickness of 25-75 micrometers, the light transmittance is 89-96%, and the haze is 2-4%. In this embodiment, the substrate layer 1 is preferably a PET film having a thickness of 50 μm.

The corona layer 6 is formed by treating a 220V/50Hz (single-phase) corona machine on the surface of the substrate layer 1, and the thickness of the corona layer is 1-2 microns. The corona treatment power for 50 micron PET film is preferably 17 KW. The adhesion can be effectively enhanced through the corona layer 6, the delamination is prevented, and the stability of the composite material is improved.

The protective layer 3 can be a BOPP antifogging film, a BOPP high-definition crystal film, an LDPE film or a PO film. Preferably a 36 micron BOPP antifog film. The BOPP antifogging film is a functional film which can prevent water vapor from forming fog on the surface of the film to influence transparency, and the BOPP antifogging film keeps high strength and does not influence transportation, storage and use. The BOPP high-definition crystal film has good waterproof performance and printability, keeps high strength and is not influenced by transportation and storage. The LDPE film has a density of about 0.92 g/cm²The polyethylene is low-density polyethylene, has good transparency and heat sealability, can prevent water and moisture, and has high tensile elongation. The PO film has high transparency, super-strong continuous fog dispersal and dripping capabilities, and can inhibit fog generation.

The release layer 2 can be a film layer formed by coating and curing dimethyl silicone oil, ethyl silicone oil, ethoxy silicone oil or phenyl silicone oil through a micro-concave roller or a scraper, the curing temperature is 110-130 ℃, and the thickness is preferably 3 microns.

The transparent conducting layer 4 is a PEDOT/PSS conducting film and is formed by micro-gravure coating, the thickness is 4 micrometers, and the curing temperature is 60-120 ℃. The PEDOT/PSS conductive film has an antistatic effect, and prevents dust or other particle foreign matters from being adsorbed.

The aging resistant layer 5 is a silicone rubber film having a thickness of 25 to 75 micrometers, preferably 50 micrometers. Have anti oxygen, anti ozone and ultraviolet function, glue the laminating back from type membrane and OCA, can reduce OCA and receive external oxygen, ozone and ultraviolet destruction, under the condition of high temperature and insolate, can prolong the life who glues from type membrane and OCA, still be a material of comparatively environmental protection moreover, can not cause huge pollution to the environment after the use.

When needing to be glued with OCA and using jointly, tear off one of them one deck protective layer 3, then glue OCA and the exerted layer 2 of leaving type mutually and laminate. The protective layer 3 is used for protecting, and the protective layer 3 is made of a BOPP anti-fog film, a BOPP high-definition crystal film, an LDPE film or a PO film, so that the protective layer has the functions of dust prevention and scratch prevention of a traditional protective film, and also has the function of preventing water vapor from forming fog on the surface of the film to influence the transparency, effectively avoids the water vapor from condensing on the surface of the release film after the change of high and low temperatures of the release film, ensures the transparency and the stripping performance, can prevent water mist from permeating in humid seasons such as spring and the like, and ensures the laminating performance of OCA glue.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the present specification, these terms are only for convenience of description and do not limit the present invention, and other release films that are the same as or similar to the present invention are also included in the protection scope of the present invention.

Claims

1. The utility model provides a OCA glues with leaving type membrane, it includes the substrate layer and leaves the type layer, its characterized in that, it still includes protective layer, transparent conducting layer, anti-aging layer and corona layer, the upper and lower surface from interior to exterior of substrate layer is equipped with in proper order corona layer, anti-aging layer, transparent conducting layer, from type layer and protective layer, the protective layer is BOPP antifog membrane, BOPP high definition crystal film, LDPE film or PO film.

2. The release film for OCA glue according to claim 1, wherein the substrate layer is PET, PP, PVC or PE.

3. The release film for OCA glue according to claim 2, wherein the thickness of the substrate layer is 25 to 75 μm.

4. The release film for OCA glue according to claim 1, wherein the transparent conductive layer is a PEDOT/PSS conductive film.

5. The release film for OCA glue according to claim 4, wherein the thickness of the transparent conductive layer is 3-6 microns.

6. The release film for OCA adhesive according to claim 1, wherein the aging resistant layer is a silicone rubber thin film.

7. The release film for OCA paste of claim 6, wherein the thickness of the aging resistant layer is 25 to 75 μm.

8. The release film for OCA glue according to claim 1, wherein the release layer is a film layer formed by curing dimethyl silicone oil, ethyl silicone oil, ethoxy silicone oil or phenyl silicone oil.

9. The release film for OCA glue according to claim 1, wherein the thickness of the corona layer is 1-2 microns.