CN112341946A - Optical silica gel tape and preparation method thereof - Google Patents
Optical silica gel tape and preparation method thereof Download PDFInfo
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- CN112341946A CN112341946A CN202011321883.8A CN202011321883A CN112341946A CN 112341946 A CN112341946 A CN 112341946A CN 202011321883 A CN202011321883 A CN 202011321883A CN 112341946 A CN112341946 A CN 112341946A
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- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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- 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
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
- C09J183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- 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
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- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- 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
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- Adhesive Tapes (AREA)
Abstract
The invention belongs to the technical field of optical cement, and particularly relates to an optical silica gel belt which comprises a light stripping release film layer, a first optical cement layer, a base material layer, a second optical cement layer and a heavy stripping release film layer which are sequentially stacked; the surface of the first optical adhesive layer close to the light stripping release film layer is of a grid structure, and/or the surface of the second optical adhesive layer close to the heavy stripping release film layer is of a grid structure. According to the optical silica gel tape, the latticed structure is arranged on the surface of the first optical silica gel layer and/or the surface of the second optical silica gel layer, when the optical silica gel tape is used, the light stripping release film and the heavy stripping release film are torn off, the optical silica gel tape is attached between the two objects, the two objects bonded by the optical silica gel tape are compressed, and gas in the latticed structure is exhausted, so that the surfaces of the first optical silica gel layer and the second optical silica gel layer are changed into a plane structure from the latticed structure, and the two objects are bonded more tightly due to the exhaust of the gas in the optical silica gel tape, and the sealing effect is better.
Description
Technical Field
The invention belongs to the technical field of optical cement, and particularly relates to an optical silica gel tape and a preparation method thereof.
Background
The optical adhesive of the optical adhesive tape is a special adhesive for cementing transparent optical elements, has the characteristics of no color, transparency, light transmittance of over 90 percent, good bonding strength, self bubble discharge function, capability of curing at room temperature or at intermediate temperature, small shrinkage rate, no need of Ultraviolet (UV) curing and the like, and is mainly used for bonding ITO conductive films, display screens, PMMA (polymethyl methacrylate) organic glass, PC (personal computer) screens, display assembly, lens assembly, resistive touch screens, capacitive touch screens, panels and other related electronic and optical instruments and the like.
The optical adhesive has various varieties due to different used raw materials or different preparation amounts of the same raw material, the main materials used for preparing the optical adhesive comprise organic silicon rubber, silicone oil, resin, unsaturated polyester and the like, and some auxiliary materials are usually added during preparation so as to improve the optical performance or reduce the curing shrinkage rate, and the transparent auxiliary materials can ensure transparent and sufficient display brightness and provide durable bonding effect. However, the principle of selecting the silica gel adhesive generally includes determining according to the chemical properties of the materials to be adhered; determined according to the physical properties of the bonded material, and the like.
Because the surface polarity is very different, the plastic and the glass are very difficult to adhere to each other, and under the condition, the adhesive composition is required to have both high glass surface affinity and good adhesive force to the plastic surface with low polarity. Meanwhile, because both base materials are not suitable for heating, the adhesive is required to be cured at a lower temperature so as to meet the requirement.
In addition, the conventional OCA optical cement and the SCA hot-melt optical cement are both optical cement without base materials, and in the using process, due to the poor filling property of the OCA optical cement, unevenness of a panel cannot be filled, and yellow spots can appear after the panel is attached; the display shows MURA phenomena such as unevenness, horizontal streaks, and vertical streaks, and also shows bubble generation. And the SCA hot-melt optical cement is completely laminated by using the single material, and because the shrinkage rate of the molten SCA hot-melt optical cement is more than 5%, the SCA hot-melt optical cement cannot release stress, and the phenomena of yellow spots, MURA, uneven display and the like can occur in the lamination. Because the existing OCA optical cement and SCA hot melt optical cement have the same problem, the bonding yield is low and the cost is high.
In view of the above, it is necessary to provide a technical solution to the above technical problems.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the optical silica gel belt has an automatic exhaust function and can effectively improve the MURA phenomena such as yellow spots, uneven display, horizontal stripes, vertical stripes and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
an optical silica gel tape comprises a light stripping release film layer, a first optical adhesive layer, a base material layer, a second optical adhesive layer and a heavy stripping release film layer which are sequentially stacked; the surface of the first optical adhesive layer close to the light stripping release film layer is of a grid structure, and/or the surface of the second optical adhesive layer close to the heavy stripping release film layer is of a grid structure.
As an improvement of the optical silica gel tape, the first optical adhesive layer and the second optical adhesive layer respectively comprise 25-75% of polysiloxane, 2-25% of organic silicon resin, 0-45% of silane coupling agent and 0.2-6.5% of photoinitiator. The photoinitiator includes at least one of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 2-isopropylthioxanthone, and bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide. The materials have a synergistic effect, and can be compatible with each other when combined together, so that the material consistency of the first optical adhesive layer and the second optical adhesive layer is improved. Moreover, the proportion can adjust the viscosity, the hardness and the bonding force of the optical cement to the optimal range.
As an improvement of the optical silica gel tape of the present invention, the polysiloxane comprises acrylate-terminated polysiloxane, the silicone resin comprises MQ silicone resin, and the silane coupling agent comprises a silane coupling agent containing methacryloxypropyl group. The MQ silicone resin is a silicone resin consisting of a monofunctional Si-O unit (M unit) and a tetrafunctional Si-O unit (SiQZ is called Q unit for short), and has a compact sphere with a double-layer structure. Wherein the silane coupling agent is at least one of gamma- (methacryloyloxy) propyl trimethoxy silane and gamma- (methacryloyloxy) propyl triethoxy silane.
As an improvement of the optical silica gel tape, the optical silica gel tape also comprises 0-7% of an oxygen scavenger. The oxygen scavenger comprises at least one of benzyl diethylaminohydroxybenzoyl benzoate, 2-ethylhexyl 2-cyano-3, 3-diphenylacrylate, sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate, and 2-hydroxy-4-methoxybenzophenone.
As an improvement of the optical silica gel tape of the present invention, the first optical adhesive layer and the second optical adhesive layer have the same thickness.
As an improvement of the optical silica gel strip, the latticed structures are all arranged in a nano latticed shape.
As an improvement of the optical silica gel tape, the substrate layer is a PET layer, the surface dyne value of the PET layer is greater than 36, and the light transmittance is greater than 95%. The optical adhesive coating flatting is on the surface of the PET substrate layer, so that the thicknesses of the first optical adhesive layer and the second optical adhesive layer are consistent, and crease marks or creases are not easy to appear.
As an improvement of the optical silica gel tape of the present invention, the light-peeling release film layer and the heavy-peeling release film layer both include a PET base film layer. The light stripping release film layer comprises a PET base film layer and a light stripping release agent layer, and the heavy stripping release film layer comprises a PET base film layer and a heavy stripping release agent layer.
The second purpose of the invention is: the preparation method of the optical silica gel tape comprises the following steps:
corroding the light-stripping release film by hydrofluoric acid and/or corroding at least one surface of the heavy-stripping release film by hydrofluoric acid to obtain a light-stripping release film with a grid structure and a heavy-stripping release film with a grid structure;
coating the optical adhesive on the surface of the substrate layer to obtain a first optical adhesive layer and a second optical adhesive layer;
and attaching the surface of the light-stripping release film with the latticed structure to the first optical adhesive layer, and attaching the surface of the heavy-stripping release film with the latticed structure to the second optical adhesive layer to obtain the optical silica gel tape.
The method comprises the steps of etching a light stripping release film and a heavy stripping release film by hydrofluoric acid to form a nano grid structure, attaching the nano grid structure to the surfaces of a first optical adhesive layer and a second optical adhesive layer, so that the surfaces of the first optical silica gel layer and/or the second optical silica gel layer also form the grid structure, tearing the light stripping release film and the heavy stripping release film when the method is used, attaching an optical silica gel tape between two objects, pressing the two objects bonded by the optical silica gel tape tightly, and exhausting gas in the grid structure, so that the surfaces of the first optical silica gel layer and the second optical silica gel layer are changed into a plane structure from the grid structure, and the two objects are bonded more tightly due to the exhausted gas in the silica gel tape, and the sealing effect is better.
Compared with the prior art, the beneficial effects of the invention include but are not limited to: the invention provides an optical silica gel tape, which comprises a light stripping release film layer, a first optical adhesive layer, a base material layer, a second optical adhesive layer and a heavy stripping release film layer which are sequentially stacked; the surface of the first optical adhesive layer close to the light stripping release film layer is of a grid structure, and/or the surface of the second optical adhesive layer close to the heavy stripping release film layer is of a grid structure.
According to the optical silica gel tape, the latticed structure is arranged on the surface of the first optical silica gel layer and/or the surface of the second optical silica gel layer, when the optical silica gel tape is used, the light stripping release film and the heavy stripping release film are torn off, the optical silica gel tape is attached between the two objects, the two objects bonded by the optical silica gel tape are compressed, and gas in the latticed structure is exhausted, so that the surfaces of the first optical silica gel layer and the second optical silica gel layer are changed into a plane structure from the latticed structure, and the two objects are bonded more tightly due to the exhaust of the gas in the optical silica gel tape, and the sealing effect is better.
Compared with an optical silica gel belt without a base material layer, the base material layer arranged between the first optical silica gel layer and the second optical silica gel layer improves the seamless joint and effective filling effects between two objects, so that the optical silica gel belt effectively changes the phenomena of bubbles, yellow spots, MURA, uneven display, horizontal stripes, vertical stripes and the like on the process of full joint of display panel products. The optical silica gel tape is suitable for full-lamination of optical materials between display panels, has the light transmittance of more than 90 percent, can reduce the reflectivity of a display screen, and improves the contrast ratio.
The optical adhesive tape has good adhesive property and air exhaust function on various polar and non-polar materials such as glass, plastic sheets, PC boards and the like.
Drawings
Fig. 1 is a cross-sectional view of an optical silicone tape according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a bonding structure of the optical silica gel tape and an object according to the present invention.
In the figure: 1-optical silica gel tape, 11-light stripping release film layer, 12-first optical adhesive layer, 13-substrate layer, 14-second optical adhesive layer and 15-heavy stripping release film layer, 2-first object and 3-second object.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and the accompanying drawings, but the embodiments of the invention are not limited thereto.
Example 1
As shown in fig. 1-2, the present embodiment provides an optical silicone adhesive tape, which includes a light-stripping release film layer 11, a first optical adhesive layer 12, a substrate layer 13, a second optical adhesive layer 14, and a heavy-stripping release film layer 15, which are sequentially stacked; the surface of the first optical adhesive layer 12 close to the light-peeling release film layer 11 is in a grid structure, and/or the surface of the second optical adhesive layer 14 close to the heavy-peeling release film layer 15 is in a grid structure.
The preparation method of the optical silica gel tape comprises the following steps:
s1, corroding the light stripping release film with hydrofluoric acid and/or corroding at least one surface of the heavy stripping release film with hydrofluoric acid to obtain a light stripping release film with a nano grid-shaped structure and a heavy stripping release film with a grid-shaped structure;
s2, placing 50% of acrylate-terminated polysiloxane, 25% of MQ silicon resin and 15% of gamma- (methacryloyloxy) propyl trimethoxy silane coupling agent into a planetary mixer, heating to 45-55 ℃, stirring for more than 0.5h, adding 5% of photoinitiator 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 5% of oxygen scavenger diethyl amino hydroxy benzoyl benzyl benzoate, and stirring for more than 30min to prepare the optical adhesive;
coating the optical cement on two surfaces of a PET substrate layer 13 respectively to obtain a first optical cement layer 12 and a second optical cement layer 14 which are the same in thickness, wherein the surface dyne value of PET is larger than 36, and the light transmittance is larger than 95%;
and S3, attaching the surface of the light-stripping release film with the nano-grid structure to the first optical adhesive layer 12, and attaching the surface of the heavy-stripping release film with the grid structure to the second optical adhesive layer 14 to obtain the optical silica gel tape.
Example 2
The embodiment provides an optical silica gel tape, which comprises a light stripping release film layer 11, a first optical adhesive layer 12, a substrate layer 13, a second optical adhesive layer 14 and a heavy stripping release film layer 15 which are sequentially stacked; the surface of the first optical adhesive layer 12 close to the light-peeling release film layer 11 is in a grid structure, and/or the surface of the second optical adhesive layer 14 close to the heavy-peeling release film layer 15 is in a grid structure.
The preparation method of the optical silica gel tape comprises the following steps:
s1, corroding the light stripping release film with hydrofluoric acid and/or corroding at least one surface of the heavy stripping release film with hydrofluoric acid to obtain a light stripping release film with a nano grid-shaped structure and a heavy stripping release film with a grid-shaped structure;
s2, placing 60% of acrylate-terminated polysiloxane, 15% of MQ silicon resin and 15% of gamma- (methacryloyloxy) propyl triethoxysilane coupling agent in a planetary mixer, heating to 45-55 ℃, stirring for more than 0.5h, adding 6% of photoinitiator 2-isopropyl thioxanthone and 4% of oxygen scavenger 2-cyano-3, 3-diphenylacrylic acid-2-ethylhexyl ester, and stirring for more than 30min to prepare the optical adhesive;
coating the optical cement on two surfaces of a PET substrate layer 13 respectively to obtain a first optical cement layer 12 and a second optical cement layer 14 which are the same in thickness, wherein the surface dyne value of PET is larger than 36, and the light transmittance is larger than 95%;
and S3, attaching the surface of the light-stripping release film with the nano-grid structure to the first optical adhesive layer 12, and attaching the surface of the heavy-stripping release film with the grid structure to the second optical adhesive layer 14 to obtain the optical silica gel tape.
Example 3
The embodiment provides an optical silica gel tape, which comprises a light stripping release film layer 11, a first optical adhesive layer 12, a substrate layer 13, a second optical adhesive layer 14 and a heavy stripping release film layer 15 which are sequentially stacked; the surface of the first optical adhesive layer 12 close to the light-peeling release film layer 11 is in a grid structure, and/or the surface of the second optical adhesive layer 14 close to the heavy-peeling release film layer 15 is in a grid structure.
The preparation method of the optical silica gel tape comprises the following steps:
s1, corroding the light stripping release film with hydrofluoric acid and/or corroding at least one surface of the heavy stripping release film with hydrofluoric acid to obtain a light stripping release film with a nano grid-shaped structure and a heavy stripping release film with a grid-shaped structure;
s2, placing 45% of acrylate-terminated polysiloxane, 20% of MQ silicon resin and 25% of gamma- (methacryloyloxy) propyl triethoxysilane coupling agent into a planetary mixer, heating to 45-55 ℃, stirring for more than 0.5h, adding 4% of photoinitiator bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide and 6% of oxygen scavenger 2-hydroxy-4-methoxybenzophenone, and stirring for more than 30min to prepare the optical adhesive;
coating the optical cement on two surfaces of a PET substrate layer 13 respectively to obtain a first optical cement layer 12 and a second optical cement layer 14 which are the same in thickness, wherein the surface dyne value of PET is larger than 36, and the light transmittance is larger than 95%;
and S3, attaching the surface of the light-stripping release film with the nano-grid structure to the first optical adhesive layer 12, and attaching the surface of the heavy-stripping release film with the grid structure to the second optical adhesive layer 14 to obtain the optical silica gel tape.
Comparative example 1
This comparative example provides an optical silica gel area, including the light of laminating in proper order peel off from type rete 11, first optical cement layer 12, second optical cement layer 14 and heavy peel off from type rete 15.
The surfaces of the first optical adhesive layer 12 and the second optical adhesive layer 14 are in a plane structure.
The rest is the same as embodiment 1, and the description is omitted here.
Comparative example 2
The comparative example provides an optical silica gel tape, which comprises a light stripping release film layer 11, a first optical adhesive layer 12, a second optical adhesive layer 14 and a heavy stripping release film layer 15 which are sequentially stacked; the surface of the first optical adhesive layer 12 close to the light-peeling release film layer 11 is in a grid structure, and/or the surface of the second optical adhesive layer 14 close to the heavy-peeling release film layer 15 is in a grid structure.
The rest is the same as embodiment 1, and the description is omitted here.
Comparative example 3
The comparative example provides an optical silica gel tape, which comprises a light stripping release film layer 11, a first optical adhesive layer 12, a substrate layer 14, a second optical adhesive layer 14 and a heavy stripping release film layer 15 which are sequentially laminated; the surfaces of the first optical adhesive layer 12 and the second optical adhesive layer 14 are planar structures.
The rest is the same as embodiment 1, and the description is omitted here.
And (3) performance testing:
the optical silica gel tapes prepared in examples 1 to 3 and comparative examples 1 to 3 were subjected to the following performance tests,
the test results are shown in Table 1.
TABLE 1
As can be seen from table 1, in examples 1 to 3, compared to comparative example 1 and comparative example 3, the optical silicone tapes in examples 1 to 3 do not contain bubbles and have higher release force after being bonded to an object, because the optical silicone tape of the present invention has a grid structure on the surface of the first optical silicone layer and/or the second optical silicone layer, when in use, the light-peeling release film and the heavy-peeling release film are peeled off, the optical silicone tape is attached between the first object 2 and the second object 3, the two objects bonded by the optical silicone tape are compressed, and the gas in the grid structure is exhausted, so that the surface of the first optical silicone layer and the surface of the second optical silicone layer are changed from the grid structure to a planar structure, and the two objects are bonded more tightly and the sealing effect is better because the gas in the optical silicone tape is exhausted.
As can also be seen from table 1, examples 1 to 3 have better overall adhesion effects than comparative examples 1 and 2. The substrate layer is arranged between the first optical silica gel layer and the second optical silica gel layer, and compared with an optical silica gel belt without the substrate layer, the substrate layer arranged in the invention improves the seamless joint and effective filling effect between two objects, so that the phenomena of bubbles, yellow spots, MURA, uneven display, horizontal stripes, vertical stripes and the like are effectively changed on the process of fully jointing the display panel products by the optical silica gel belt. The optical silica gel tape is suitable for full-lamination of optical materials between display panels, has light transmittance of more than 90 percent and is slightly lower than that of the conventional optical silica gel tape, but the optical silica gel tape can reduce the reflectivity of a display screen and improve the contrast.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. An optical silica gel tape is characterized by comprising a light stripping release film layer, a first optical adhesive layer, a base material layer, a second optical adhesive layer and a heavy stripping release film layer which are sequentially stacked; the surface of the first optical adhesive layer close to the light stripping release film layer is of a grid structure, and/or the surface of the second optical adhesive layer close to the heavy stripping release film layer is of a grid structure.
2. The optical silica gel tape according to claim 1, wherein the first optical adhesive layer and the second optical adhesive layer each comprise 25 to 75% of polysiloxane, 2 to 25% of silicone resin, 0 to 45% of silane coupling agent, and 0.2 to 6.5% of photoinitiator.
3. The optical silica gel tape according to claim 2, wherein the polysiloxane comprises acrylate terminated polysiloxane, the silicone resin comprises MQ silicone resin, and the silane coupling agent comprises a silane coupling agent comprising methacryloxypropyl.
4. The optical silica gel tape according to claim 2, further comprising 0-7% oxygen scavenger.
5. The optical silicone tape according to claim 1, wherein the first optical glue layer and the second optical glue layer are the same thickness.
6. The optical silica gel ribbon according to claim 1, wherein the lattice-like structures are each arranged in a nano-lattice shape.
7. The optical silica gel tape of claim 1, wherein the substrate layer is a PET layer, the PET surface dyne value is greater than 36, and the light transmittance is greater than 95%.
8. The optical silicone tape according to claim 1, wherein the light release film layer and the heavy release film layer each comprise a PET-based film layer.
9. The method for preparing the optical silica gel tape according to any one of claims 1 to 8, comprising the steps of:
corroding the light-stripping release film by hydrofluoric acid and/or corroding at least one surface of the heavy-stripping release film by hydrofluoric acid to obtain a light-stripping release film with a grid structure and a heavy-stripping release film with a grid structure;
coating the optical adhesive on the surface of the substrate layer to obtain a first optical adhesive layer and a second optical adhesive layer;
and attaching the surface of the light-stripping release film with the latticed structure to the first optical adhesive layer, and attaching the surface of the heavy-stripping release film with the latticed structure to the second optical adhesive layer to obtain the optical silica gel tape.
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| CN113502133A (en) * | 2021-07-21 | 2021-10-15 | 马鞍山东毅新材料科技有限公司 | Optical film capable of defoaming during gluing and production process thereof |
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