CN115584220A - Release film for OCA optical cement protective film and preparation method thereof - Google Patents
Release film for OCA optical cement protective film and preparation method thereof Download PDFInfo
- Publication number
- CN115584220A CN115584220A CN202211051524.4A CN202211051524A CN115584220A CN 115584220 A CN115584220 A CN 115584220A CN 202211051524 A CN202211051524 A CN 202211051524A CN 115584220 A CN115584220 A CN 115584220A
- Authority
- CN
- China
- Prior art keywords
- parts
- release
- release film
- layer
- oca
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/005—Presence of polysiloxane in the release coating
Abstract
The invention discloses a release film for OCA (optical clear adhesive) optical cement, which comprises a base film layer and a release agent layer, wherein the release agent layer comprises the following components in parts by weight: 2800-3200 parts of 120# gasoline, 4000-6000 parts of butanone, 3000-4000 parts of toluene, 300-700 parts of ethyl acetate, 2500-3500 parts of n-octane, 800-1200 parts of dimethylvinylsiloxane resin, 10-20 parts of butyl methoxysiloxane, 7-13 parts of 2-ethyl-4-methylimidazole, 3-7 parts of tetramethyltetravinylcyclotetrasiloxane, 25-35 parts of 2-hydroxy-4-n-octyloxybenzophenone and 6-10 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane. The finished release film has the light transmittance of more than 90 percent and the haze of less than 1 percent, and has stable peeling force after UV curing after being coated with OCA glue, and does not climb after being placed for a long time.
Description
Technical Field
The invention relates to the technical field of release film preparation, in particular to a PET release film applied to an optical OCA optical adhesive protective film and a preparation method thereof.
Background
The OCA (Optical Clear Adhesive) is a transparent Optical double-sided Adhesive tape, is mainly used for bonding a display screen and other Optical devices (such as a touch display screen, a mobile phone glass rear cover and the like), and is a double-sided Adhesive tape with high light transmittance simply explained. The main material of the OCA colloid is polymethyl methacrylate, and the OCA colloid needs to have the advantages of high temperature resistance, high humidity resistance, UV resistance, high viscosity and the like, and the light transmittance can generally reach more than 90%.
OCA is attached to be one of the main technologies of display screen rear end laminating, and OCA generally need respectively laminate the one deck from the type membrane as the protection film in the use on upper and lower two sides, and the quality of protection film plays an important role again in whole attached process, has very big influence to the yield of product laminating.
Disclosure of Invention
The invention aims to solve the problem that the aging peeling force climbs after glue is coated on a heavy film in the existing OCA optical adhesive production process, and provides a brand-new release film.
In order to achieve the purpose, the invention provides the following technical scheme:
the release film for the OCA comprises a base film layer and a release agent layer, wherein the release agent layer comprises the following components in parts by weight: 2800-3200 parts of 120# gasoline, 4000-6000 parts of butanone, 3000-4000 parts of toluene, 300-700 parts of ethyl acetate, 2500-3500 parts of n-octane, 800-1200 parts of dimethylvinylsiloxane resin, 10-20 parts of butyl methoxysiloxane, 7-13 parts of 2-ethyl-4-methylimidazole, 3-7 parts of tetramethyltetravinylcyclotetrasiloxane, 25-35 parts of 2-hydroxy-4-n-octyloxybenzophenone and 6-10 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane.
Preferably, the base film layer is a PET film layer
Preferably, the light transmittance of the release film is more than 90%, and the haze is less than 1%.
Preferably, the thickness of the base film layer is 25 to 75 μm.
Preferably, the thickness of the release layer is 0.25-1 μm.
As another object of the present invention, the present invention further provides a method for preparing the release film, comprising the steps of:
(1) Will 120 # Mixing gasoline, butanone, toluene, ethyl acetate and n-octane as a solvent; pouring the dimethylvinylsiloxane resin into a solvent, 15Stirring at 00 r/min for 20 minutes;
(2) Sequentially adding butyl methoxysiloxane, 2-ethyl-4-methylimidazole, tetramethyltetravinylcyclotetrasiloxane, 2-hydroxy-4-n-octyloxybenzophenone, platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane, stirring for 10 minutes under 1500 revolutions/mi after adding each component, then adding the next component, completely and uniformly mixing, and filtering by using a 200-mesh filter screen to obtain a mold release agent mixed solution for later use;
(3) And (3) uniformly coating the parting agent mixed solution obtained in the step (2) on the base film layer, wherein the baking temperature of a baking oven is 85 +/-5 ℃, 130 +/-5 ℃, 140 +/-5 ℃, 105 +/-5 ℃ and 85 +/-5 ℃, and the baking time of each section is 3s, so that the parting agent is obtained.
Preferably, the release agent mixture in step (2) is used within 3 hours, and the standby time exceeds 3 hours, and the release agent mixture should be prepared again.
The invention has the beneficial effects that:
the release film prepared by the invention has the advantages that the light transmittance is more than 90%, the haze is less than 1%, and after OCA glue is coated, the peeling force is stable after UV curing, and the release film does not climb for a long time.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The release film for the OCA is prepared by the following method:
(1) Preparing a release agent, namely 120 # 2800 parts of gasoline, 4000 parts of butanone, 4000 parts of toluene, 700 parts of ethyl acetate and 3500 parts of n-octane are mixed to be used as a solvent; pouring 800 parts of dimethylvinylsiloxane resin into a solvent, stirring at 1500 rpm for 20 minutes, and then sequentially adding 10 parts of butyl methoxysiloxane and 2-ethyl-4-methyl7 parts of imidazole, 3 parts of tetramethyltetravinylcyclotetrasiloxane, 25 parts of 2-hydroxy-4-n-octoxybenzophenone, 6 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane, stirring for 10 minutes at 1500 revolutions per minute after each addition of one of the components, adding the next component, filtering by adopting a 200-mesh filter screen, and prolonging the effective service life by 3 hours.
(2) The base film is a domestic optical PET original film;
(3) Uniformly coating the release agent prepared in the step (1) on the base film layer in a micro-concave coating mode, and thermally curing to obtain the release film. The thickness of the base film layer is 50 μm, and the thickness of the release layer is 1 μm.
Example 2
The preparation method of the release film for the OCA optical adhesive provided in this embodiment is the same as that in embodiment 1, except that the release layer comprises the following components in parts by weight:
120 # 3000 parts of gasoline, 5000 parts of butanone, 3500 parts of toluene, 500 parts of ethyl acetate, 3000 parts of n-octane, 1000 parts of dimethylvinylsiloxane resin, 15 parts of butyl methoxysiloxane, 10 parts of 2-ethyl-4-methylimidazole, 5 parts of tetramethyltetravinylcyclotetrasiloxane, 30 parts of 2-hydroxy-4-n-octyloxybenzophenone and 8 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane.
Example 3
The preparation method of the release film for the OCA optical adhesive provided in this embodiment is the same as that in embodiment 1, except that the release layer comprises the following components in parts by weight:
120 # 3200 parts of gasoline, 6000 parts of butanone, 3000 parts of toluene, 300 parts of ethyl acetate, 2500 parts of n-octane, 1200 parts of dimethyl vinyl siloxane resin, 20 parts of butyl methoxy siloxane, 13 parts of 2-ethyl-4-methylimidazole, 7 parts of tetramethyl tetravinylcyclotetrasiloxane, 35 parts of 2-hydroxy-4-n-octoxy benzophenone and 10 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyl disiloxane.
Comparative example 1
The preparation method of the release film for OCA optical cement provided by the comparative example is the same as that of example 1The difference lies in that the release agent layer comprises the following components in parts by weight: 120 # 3000 parts of gasoline, 5000 parts of butanone, 3500 parts of toluene, 500 parts of ethyl acetate, 3000 parts of n-octane, 1000 parts of dimethylvinylsiloxane resin, 15 parts of butyl methoxysiloxane, 10 parts of 2-ethyl-4-methylimidazole and 8 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane.
The following table shows the comparison of the characteristics of the PET release film applied to the OCA optical adhesive protective film prepared in the examples and the comparative examples, and the specific detection method: coating OCA glue on a release film, passing through a UV lamp (UV energy is 250 mJ/cm) 2 ) Curing after irradiation, wherein the thickness of the cured OCA glue layer is about 175 mu m, cutting the OCA glue layer into a glue strip with the length of 15cm and the width of 1inch, pasting one side of the OCA which is not covered by the release film on a steel plate with a clean surface, using a 2kg compression roller to make a round trip twice, measuring the peeling force of the release film on the other side from the OCA, respectively testing the instant peeling force, and placing the glue strips for 3d, 7d, 15d and 30 d.
TABLE 1 Release film test results
As can be seen from the table, the instant adhesive peeling force of the example changed less to the adhesive peeling force of 30 days, while the adhesive peeling force of the comparative example changed the most, indicating that the peeling effect of the present invention was the best.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The release film for OCA (optically clear adhesive) comprises a base film layer and a release agent layer, and is characterized in that the release agent layer comprises the following components in parts by weight: 2800-3200 parts of 120# gasoline, 4000-6000 parts of butanone, 3000-4000 parts of toluene, 300-700 parts of ethyl acetate, 2500-3500 parts of n-octane, 800-1200 parts of dimethylvinylsiloxane resin, 10-20 parts of butyl methoxysiloxane, 7-13 parts of 2-ethyl-4-methylimidazole, 3-7 parts of tetramethyltetravinylcyclotetrasiloxane, 25-35 parts of 2-hydroxy-4-n-octyloxybenzophenone and 6-10 parts of platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane.
2. The release film according to claim 1, wherein the base film layer is a PET film layer.
3. The release film according to claim 1, wherein the release film has a light transmittance of 90% or more and a haze of 1% or less.
4. The release film according to claim 1, wherein the thickness of the base film layer is 25-75 μm.
5. The release film according to claim 1, wherein the release layer has a thickness of 0.25 to 1 μm.
6. The method for preparing the release film according to any one of claims 1 to 5, comprising the steps of:
(1) Will 120 # Mixing gasoline, butanone, toluene, ethyl acetate and n-octane as a solvent; pouring the dimethyl vinyl siloxane resin into the solvent, and stirring for 20 minutes at 1500 rpm;
(2) Sequentially adding butyl methoxysiloxane, 2-ethyl-4-methylimidazole, tetramethyltetravinylcyclotetrasiloxane, 2-hydroxy-4-n-octyloxybenzophenone, platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane, stirring for 10 minutes under 1500 revolutions/mi after adding each component, then adding the next component, completely and uniformly mixing, and filtering by using a 200-mesh filter screen to obtain a mold release agent mixed solution for later use;
(3) And (3) uniformly coating the parting agent mixed solution obtained in the step (2) on the base film layer, baking, curing and forming by an oven, wherein the baking temperature of the oven is 85 +/-5 ℃, 130 +/-5 ℃, 140 +/-5 ℃, 105 +/-5 ℃ and 85 +/-5 ℃, and the baking time of each section is 3s, so as to obtain the parting agent.
7. The method of claim 6, wherein the release agent mixture in step (2) is used within 3 hours and is prepared again after a standby time of more than 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051524.4A CN115584220A (en) | 2022-08-30 | 2022-08-30 | Release film for OCA optical cement protective film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051524.4A CN115584220A (en) | 2022-08-30 | 2022-08-30 | Release film for OCA optical cement protective film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115584220A true CN115584220A (en) | 2023-01-10 |
Family
ID=84771778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211051524.4A Pending CN115584220A (en) | 2022-08-30 | 2022-08-30 | Release film for OCA optical cement protective film and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115584220A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130704A (en) * | 2014-06-29 | 2014-11-05 | 惠州市永卓科技有限公司 | Low stripping force solvent-type paper isolation agent and preparation method thereof |
| CN104817702A (en) * | 2015-04-29 | 2015-08-05 | 中科院广州化学有限公司南雄材料生产基地 | Spherical dendritic organic silicon macromolecule, preparation method thereof and application |
| CN109096512A (en) * | 2018-06-27 | 2018-12-28 | 江阴华美光电科技有限公司 | A kind of non-silicon PET release film and its production technology as silica gel roller protective film |
| US20200239744A1 (en) * | 2019-01-30 | 2020-07-30 | Nan Ya Plastics Corporation | Optical clear adhesive and manufacturing method thereof |
| CN112574452A (en) * | 2020-11-28 | 2021-03-30 | 江苏双星彩塑新材料股份有限公司 | Heavy release film for OCA (optical clear adhesive) |
| CN112812352A (en) * | 2021-01-13 | 2021-05-18 | 江阴华美光电科技有限公司 | PET release film applied to field of polaroids and preparation method thereof |
-
2022
- 2022-08-30 CN CN202211051524.4A patent/CN115584220A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130704A (en) * | 2014-06-29 | 2014-11-05 | 惠州市永卓科技有限公司 | Low stripping force solvent-type paper isolation agent and preparation method thereof |
| CN104817702A (en) * | 2015-04-29 | 2015-08-05 | 中科院广州化学有限公司南雄材料生产基地 | Spherical dendritic organic silicon macromolecule, preparation method thereof and application |
| CN109096512A (en) * | 2018-06-27 | 2018-12-28 | 江阴华美光电科技有限公司 | A kind of non-silicon PET release film and its production technology as silica gel roller protective film |
| US20200239744A1 (en) * | 2019-01-30 | 2020-07-30 | Nan Ya Plastics Corporation | Optical clear adhesive and manufacturing method thereof |
| CN112574452A (en) * | 2020-11-28 | 2021-03-30 | 江苏双星彩塑新材料股份有限公司 | Heavy release film for OCA (optical clear adhesive) |
| CN112812352A (en) * | 2021-01-13 | 2021-05-18 | 江阴华美光电科技有限公司 | PET release film applied to field of polaroids and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104356969B (en) | Device used for image display transparent double face bonding sheet and the image display device using the double-sided adhesive sheet | |
| WO2016082332A1 (en) | Method for preparing liquid silicone rubber for lcd screen protection film | |
| CN106893129A (en) | A kind of PET mould release membrances and its production technology for being applied to OCA glue | |
| CN103865408B (en) | A kind of dual cure optical cement based on modified organic silicon material and application thereof | |
| CN110577810A (en) | Adhesive and preparation method thereof, and explosion-proof membrane and preparation method thereof | |
| CN109609020B (en) | Anti-warping optical brightness enhancement film and preparation method thereof | |
| CN112280527B (en) | Liquid organic silicon optical adhesive and preparation method and application thereof | |
| CN110484155A (en) | Unlocked by fingerprint mobile phone 2.5D protective film and preparation method thereof under a kind of screen | |
| CN111704872A (en) | PU (polyurethane) adhesive protective film for display screen and preparation method thereof | |
| CN108727624A (en) | A kind of preparation method and applications of self-assembled nanometer composite high-molecular functional material | |
| CN113025227A (en) | Novel printable inner anti-explosion membrane of mobile phone rear cover and preparation method thereof | |
| CN112812352A (en) | PET release film applied to field of polaroids and preparation method thereof | |
| CN115627151A (en) | Organosilicon OCA of dual curing system | |
| CN114350304A (en) | Durable high-transmittance OCA (optically clear adhesive) and preparation method thereof | |
| CN115584220A (en) | Release film for OCA optical cement protective film and preparation method thereof | |
| CN109504305A (en) | A kind of peep-proof soft glass film and preparation method thereof | |
| CN109031750A (en) | A kind of white light writing, reflection enhancement type liquid crystal board and preparation method thereof | |
| CN115521730A (en) | Optical silica gel OCA (optically clear adhesive) adhesive film for attaching reflector plate and preparation process thereof | |
| CN113980584B (en) | UV glue, preparation method, application and protective film | |
| CN104910701B (en) | A kind of composition, ultraviolet absorption band, liquid crystal display panel and its manufacture method | |
| CN104589744B (en) | A kind of antivibration protecting film and preparation method thereof | |
| CN203938634U (en) | A kind of AB double faced adhesive tape for toughened glass | |
| CN114702714B (en) | Release film for MLCC and preparation method thereof | |
| CN110408344B (en) | Flame retardant for optical hot melt adhesive, preparation method of flame retardant and optical hot melt adhesive film | |
| CN114656844B (en) | Fluorocarbon coating, fluorocarbon coating liquid and transparent solar backboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |