CN113329877A - Optical adhesive, preparation method thereof and display panel - Google Patents
Optical adhesive, preparation method thereof and display panel Download PDFInfo
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- CN113329877A CN113329877A CN201880094167.5A CN201880094167A CN113329877A CN 113329877 A CN113329877 A CN 113329877A CN 201880094167 A CN201880094167 A CN 201880094167A CN 113329877 A CN113329877 A CN 113329877A
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- adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The utility model provides a preparation method of optical cement (10), display panel (20) and optical cement, optical cement (10) include basement membrane (100), printing ink layer (200) and first glue film (300), printing ink layer (200) set up on the surface of basement membrane (100), and the area of printing ink layer (200) is less than the area of basement membrane (100), first glue film (300) set up on basement membrane (100) and cover printing ink layer (200). The optical cement can be used for shielding the device or shading when being used for bonding the device or the film layer, and directly sets up the printing ink layer between the optical cement and the basement membrane, and the poor filling ability of printing ink segment between the printing ink layer that forms and the optical cement is compared in being used for the printing ink layer on the bonding apron and the poor filling ability of printing ink segment between the printing ink layer that forms and the optical cement is stronger with the optical cement.
Description
The invention belongs to the technical field of display, and particularly relates to an optical cement, a preparation method thereof and a display panel.
The flexible display screen is used as a new generation display screen of the intelligent equipment, and is a next generation human-computer interaction and everything interconnection technology and product. Two-layer rete or device about the optical cement bonding is usually required to the display screen preparation in-process, still need the device that the printing ink layer will shelter from in the display screen usually to block or be used for the shading to prevent the light leak, current printing ink layer sets up the back at the apron, when optical cement was laminated with the apron that has the printing ink layer, thereby it leads to the bonding interface laminating not closely to have the space to have the segment difference between optical cement and the printing ink layer, produce the bubble easily and then lead to the display effect to descend, peel off easily in process of production and drop, influence the product yield.
Disclosure of Invention
In view of the above, the present invention provides an optical cement that can be used for shielding devices or shading light. The specific technical scheme is as follows.
An optical cement, comprising:
a base film;
the ink layer is arranged on the surface of the base film, and the area of the ink layer is smaller than that of the base film;
the first glue layer is arranged on the base film and covers the ink layer.
Preferably, the base film includes a first ink region and a second ink region, the first ink region and the second ink region are disposed at two ends of the base film at intervals, and the ink layers are disposed in the first ink region and the second ink region.
Preferably, the optical cement further comprises:
and the second adhesive layer is arranged on the surface of the base film, which is far away from the ink layer.
Preferably, the first adhesive layer is a viscosity reduction adhesive, and when the viscosity reduction condition is met, the interfacial adhesion force of the first adhesive layer is reduced, and the viscosity reduction condition includes at least one of ultraviolet light irradiation, infrared light irradiation, laser light irradiation, electric field application, force field application, magnetic field application, low temperature and heating.
Preferably, the first adhesive layer includes a photoinitiator, and when the first adhesive layer is irradiated by ultraviolet light, the photoinitiator can initiate decomposition of molecules in the first adhesive layer to reduce interfacial adhesion of the first adhesive layer.
Preferably, the first adhesive layer includes a gas initiator, and when the first adhesive layer is irradiated by ultraviolet light, the gas initiator can be cracked to generate gas so as to reduce the interfacial adhesion of the first adhesive layer.
Preferably, the second adhesive layer is an anti-adhesive layer, and when the anti-adhesive condition is met, the interface adhesive force of the second adhesive layer is reduced, and the anti-adhesive condition includes at least one of ultraviolet light irradiation, infrared light irradiation, laser irradiation, electric field application, force field application, magnetic field application, low temperature and heating.
Preferably, the surface of the first glue layer away from the base film is a plane.
Preferably, the optical cement further comprises:
the first release film is arranged on the surface, away from the base film, of the first glue layer.
Preferably, the optical cement further comprises:
the second is from the type membrane, the second is set up from the type membrane the second optical cement is kept away from on the surface of basement membrane.
Preferably, the adhesive force of the second release film adhering to the second adhesive layer is different from the adhesive force of the first release film adhering to the first adhesive layer.
The invention also provides a display panel, which comprises the optical cement.
Preferably, the display panel further includes a cover plate disposed on a surface of the first glue layer of the optical glue away from the base film.
Preferably, the cover plate comprises a cover plate base film and a hardened layer which are stacked, and the cover plate base film is arranged on the surface of the base film far away from the first glue layer.
Preferably, the display panel includes a touch layer disposed in the base film in the optical adhesive.
Preferably, the display panel includes:
the polaroid is arranged on one side, far away from the cover plate, of the optical adhesive;
the organic electroluminescent display layer is arranged on one side, far away from the optical glue, of the polarizer;
the thin film transistor layer is arranged on one side, far away from the polaroid, of the organic electroluminescent display layer;
and the support film is arranged on one side of the thin film transistor layer, which is far away from the organic electroluminescent display layer.
The invention also provides a preparation method of the optical cement, which comprises the following steps:
providing a basement membrane;
forming an ink layer on the base film, wherein the area of the ink layer is smaller than that of the base film;
and forming a first adhesive layer on the base film, wherein the first adhesive layer covers the ink layer.
Preferably, the method for preparing the optical adhesive further comprises, after forming the first adhesive layer:
and turning over the base film, and forming a second glue layer on the surface of the base film, which is far away from the first glue layer.
Preferably, the method for preparing the optical adhesive further includes, between "forming a first adhesive layer on the base film, the first adhesive layer covering the ink layer" and "turning over the base film, and forming a second adhesive layer on a surface of the base film away from the ink layer":
forming a first release film on the surface of the first glue layer far away from the base film;
after the step of turning over the base film and forming the second glue layer on the surface of the base film far away from the first glue layer, the method further comprises the following steps:
and forming a second release film on the surface of the second adhesive layer far away from the base film.
The invention also provides a preparation method of the optical cement, which comprises the following steps:
providing a basement membrane;
forming a second glue layer on the base film;
a base film is turned over, an ink layer is formed on the surface, far away from the second adhesive layer, of the base film, and the area of the ink layer is smaller than that of the base film;
and forming a first adhesive layer on the base film, which is far away from the second adhesive layer, wherein the first adhesive layer covers the ink layer.
Preferably, the method for preparing the optical adhesive further includes, between "forming a second adhesive layer on the base film" and "turning over the base film, forming an ink layer on a surface of the base film away from the second adhesive layer, where an area of the ink layer is smaller than an area of the base film":
forming a second release film on the surface of the second adhesive layer far away from the base film;
after "forming a first adhesive layer on the substrate film away from the second adhesive layer, the first adhesive layer covering the ink layer", the method further includes:
and forming a first release film on the surface of the first glue layer far away from the base film.
The invention has the beneficial effects that: the optical cement provided by the invention can be used for shielding a device or shading light when used for bonding the device or a film layer, and the ink layer is directly arranged between the optical cement and the base film, so that the filling capacity of the ink section difference between the formed ink layer and the optical cement is higher than that of the ink section difference between the ink layer and the optical cement formed by bonding the ink layer on the cover plate by using the optical cement layer.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an optical adhesive according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another optical adhesive according to the first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an ink region of an optical adhesive according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of an optical adhesive according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optical adhesive according to a third embodiment of the present invention;
fig. 6a and fig. 6b are schematic diagrams of a first adhesive layer provided by the present invention before and after decomposition under ultraviolet light;
fig. 7 is a schematic structural diagram of an optical adhesive according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display panel according to the present invention;
FIG. 9 is a schematic view of the ink layer disposed on the cover plate;
FIG. 10 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 11 is a flow chart of a method for manufacturing an optical adhesive according to the present invention;
FIG. 12 is a flow chart of another method for preparing an optical adhesive according to the present invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The terms "first," "second," and the like in the description and in the claims, and in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, a first embodiment of the invention provides an optical adhesive 10, where the optical adhesive 10 includes a substrate film 100, an ink layer 200 and a first adhesive layer 300, the ink layer 200 is disposed on a surface of the substrate film 100, an area of the ink layer 200 is smaller than an area of the substrate film 100, and the first adhesive layer 300 is disposed on the substrate film 100 and covers the ink layer 200. The optical cement 10 can be used for bonding a device or a film layer and can also be used for a device needing ink layer shading, shielding the device or needing marking, and the ink layer 200 is arranged between the base film 100 and the optical cement layer 300, so that the first optical cement 300 can completely absorb the ink section difference of the ink layer 200. It is understood that, when the substrate film 100 is coated or printed with the fluid optical adhesive layer material and covers the ink layer 200, the fluid optical adhesive layer material can be more tightly attached to the ink layer 200 and fill the ink step.
Referring to fig. 2, in a further embodiment, the surface 310 of the first glue layer 300 away from the substrate film 100 is a plane. The interface between the first optical adhesive 300 and the target device or film layer to be bonded is bonded more tightly, for example, the first optical adhesive 300 is bonded with the cover plate in the electronic display device, so that the first optical adhesive 300 and the cover plate are completely attached to each other, and when the flexible electronic display device is used in the flexible electronic display device, the interface between the first optical adhesive 300 and the cover plate is not peeled off in the bending process after the first optical adhesive is attached to the cover plate. It is understood that, during the preparation, the optical adhesive layer material having a fluid state is coated or printed on the substrate film 100 and covers the ink layer 200, and the fluid optical adhesive layer material is cured to form a semi-solid optical adhesive having a planar adhesive property.
The material of the substrate film 100 includes, but is not limited to, Polyethylene terephthalate (PET), high-transmittance Colorless Polyimide (Colorless Polyimide), and polymethyl methacrylate (PMMA). Preferably, the material of the substrate film 100 and the material of the ink layer 200 have a good adsorption force, so that the ink layer 200 can be better printed on the substrate film 100. Preferably, the thickness of the base film 100 is less than or equal to 25 μm, so that the base film 100 occupies a smaller thickness proportion of the whole optical cement 10 and has higher bending property.
In a further embodiment, the substrate film 100 includes a first ink region 110 and a second ink region 120, the first ink region 110 and the second ink region 120 are disposed at both ends of the substrate film 100 at intervals, and the ink layer 200 is disposed in the first ink region 110 and the second ink region 120. It is understood that when the optical adhesive 10 is used in an electronic display device, the ink area 130 of the substrate film 100 may be disposed along a circumference of the substrate film 100 (see fig. 3), wherein the ink area 130 refers to an area where the ink layer 200 is located. In other embodiments, the ink zones 130 can be patterned according to different appearance requirements, size, etc., and can be adjusted according to the actual application of the optical adhesive 10. It is understood that ink patterning includes, but is not limited to, rectangular, diamond, circular, triangular, and the like.
Referring to fig. 4, a second embodiment of the invention provides an optical adhesive 10a, where the optical adhesive 10a further includes a second adhesive layer 500, and the second adhesive layer 500 is disposed on a surface of the substrate film 100 away from the ink layer 200. In the optical adhesive 10a of this embodiment, the first adhesive layer 300 and the second adhesive layer 500 are respectively disposed on the upper surface and the lower surface, the first adhesive layer 300 is used for bonding one surface, and the second adhesive layer 500 is used for bonding the other surface, so that the upper surface and the lower surface of the optical adhesive 10a can be bonded with devices or film layers. For example, when the optical adhesive 10a is used in a flexible electronic display device, the first adhesive layer 300 is used for adhering a cover plate, and the second adhesive layer 500 is used for adhering a polarizer in the flexible electronic display device.
The thicknesses of the first adhesive layer 300 and the second adhesive layer 500 are controlled to be less than 100 μm, and preferably less than 50 μm, so that the optical adhesive layer is thinner and has better bending characteristics. The components of the first adhesive layer 300 and the second adhesive layer 500 include, but are not limited to, at least one of an acrylic compound, a silicone compound, a rubber compound, and a urethane compound.
In a further embodiment, the first adhesive layer 300 is an anti-adhesive layer, and the interfacial adhesion of the first adhesive layer 300 is reduced when the anti-adhesive condition of the first adhesive layer 300 is satisfied, where the anti-adhesive condition includes at least one of ultraviolet irradiation, infrared irradiation, laser irradiation, electric field application, force field application, magnetic field application, low temperature and heating. Interfacial adhesion refers to the adhesion between the bond line and the interface. The first adhesive layer 300 is made of the anti-adhesive agent, so that a target device or a film layer to be bonded by the first adhesive layer 300 can be guaranteed to be reworked, for example, when the first adhesive layer 300 is used for bonding a cover plate, when the cover plate is in a problem and needs to be reworked, the first adhesive layer 300 is subjected to anti-adhesive treatment to reduce the adhesive force, the cover plate can be peeled off, and reworking is facilitated. Preferably, the adhesive force of the first adhesive layer 300 can be reduced to less than 100 g/inch.
When the anti-sticking condition is applied, the first adhesive layer 300 is placed in an optical field (such as ultraviolet light/infrared light/laser irradiation), and external energy acts on the first adhesive layer 300, so that the molecular structure of the first adhesive layer 300 is changed, and the interfacial adhesive force adhered to a target device or a film layer is reduced; or the first adhesive layer 300 is placed in an electric field (current and voltage are applied, and heat is generated by electricity), and the first adhesive layer 300 absorbs certain energy, so that the interfacial adhesion force of the first adhesive layer 300 on a target device or a film layer is reduced; or the first adhesive layer 300 is placed in a magnetic field (the magnetic field is applied and converted into an electric field, and the electric field generates heat), and the first adhesive layer 300 absorbs certain energy, so that the interface bonding force of the first adhesive layer 300 adhered to a target device or a film layer is reduced; or a force field, for example, the first adhesive layer 300 is made of a viscous piezoelectric material, when a force is applied to the piezoelectric material, the piezoelectric material generates a voltage, that is, an electric field is applied to the first adhesive layer 300, and the first adhesive layer 300 absorbs a certain amount of energy, so that the interfacial adhesion force of the first adhesive layer 300 to the target device or film layer is reduced; or, when the first adhesive layer 300 is heated, the first adhesive layer 300 absorbs a certain amount of energy, which results in a decrease in the interfacial adhesion of the first adhesive layer 300 to the target device or film.
Referring to fig. 5, a third embodiment of the invention provides an optical adhesive 10b, in the optical adhesive 10b, the first adhesive layer 300 includes a photo initiator 310, and when the first adhesive layer 300 is irradiated by ultraviolet light, the photo initiator can initiate decomposition of molecules in the first adhesive layer 300 to reduce the interfacial adhesion of the first adhesive layer 300. Referring to fig. 6a (before decomposition) and fig. 6b (after decomposition), for example, the first adhesive layer 300 includes a polyacrylic compound material, and when the photoinitiator 310 is irradiated by ultraviolet light, the polyacrylic compound is triggered to undergo molecular decomposition and is cracked into small molecular substances, so that the interface molecular acting force is reduced, and the purpose of reducing the peel strength is achieved.
Referring to fig. 7, a fourth embodiment of the invention provides an optical adhesive 10c, in the optical adhesive 10c, the first adhesive layer 300 includes a gas initiator 320, and when the first adhesive layer 300 is irradiated by ultraviolet light, the gas initiator 320 can be cracked to generate gas so as to reduce the interfacial adhesion of the first adhesive layer 300. For example, when the first adhesive layer 300 includes a polyurethane compound, nitrogen gas is generated under the irradiation of ultraviolet light, and the first adhesive layer 300 is separated from the bonding interface during the generation of the nitrogen gas, so that the peel strength is greatly reduced.
In a further embodiment, the second adhesive layer 500 is an anti-adhesive layer, and the interfacial adhesion of the second adhesive layer 500 is reduced when the anti-adhesive condition of the second adhesive layer 500 is satisfied, where the anti-adhesive condition includes at least one of ultraviolet irradiation, infrared irradiation, laser irradiation, electric field application, force field application, magnetic field application, low temperature and heating. Likewise, the anti-stiction properties ensure that the target device or film to which the second bondline 500 is to be bonded is reworked. It is understood that the optical adhesive 10 can simultaneously make one or both of the first adhesive layer 300 or the second adhesive 500 be a glue reducing layer, as desired. It is understood that the optical adhesive properties of the first adhesive layer 300 and the second adhesive layer 500 can be set according to different functions. The optical adhesive properties include, but are not limited to, peel strength (peeling force), low water vapor transmission rate (low water vapor transmission rate), high/low dielectric constant (high/low dielectric constant), bending characteristics (bending), and the like.
Referring to fig. 4 again, in a further embodiment, the optical adhesive 10a further includes a first release film 400, and the first release film 400 is disposed on a surface of the first adhesive layer 300 away from the substrate film 100. The first release film 400 is used to protect the first adhesive layer 300. Wherein the first release film 400 includes at least one of a PE (polyethylene) release film, a PET release film, an OPP (polypropylene) release film, and a composite release film. Preferably, the first release film 400 is made of two or more materials selected from PE, PET, and OPP.
In a further embodiment, the optical adhesive 10a further includes a second release film 600, and the second release film 600 is disposed on a surface of the second optical adhesive 500 away from the substrate film 100. The second release film 600 is used to protect the second optical glue 500.
In a further embodiment, the adhesion force of the second release film 600 to the second adhesive layer 500 is different from the adhesion force of the first release film 400 to the first adhesive layer 300. That is, it is ensured that one side of the release film is peeled off first and the other side is peeled off later, the optical adhesive 10a of this embodiment can be used to first peel off the first release film 400 and bond the first adhesive layer 300 to the target device or film layer before the second adhesive layer 500. It is understood that, when the second adhesive layer 500 in the optical adhesive 10a is bonded to the target device or film layer before the first adhesive layer 300, the bonding force of the second release film 600 to the second adhesive layer 500 is smaller than that of the first release film 400 to the first adhesive layer 300. That is, the glue layer corresponding to the release film which is easier to peel off is firstly used for bonding the target device.
Referring to fig. 8, the present invention further provides a display panel 20, wherein the display panel 20 includes the optical cement 10 according to any one of the embodiments. It is understood that, as for the release film for protecting the optical adhesive layer, when the optical adhesive 10 is used for the display panel 20, the optical adhesive 10 is bonded in the display panel 20 after the first release film 400 and the second release film 600 are peeled off.
In a further embodiment, the display panel 20 further includes a cover plate 210, and the cover plate 210 is disposed on a surface of the first glue layer 300 in the optical glue 10 away from the base film 100. Wherein the cover plate 210 does not include an ink layer therein. The ink layer 200 in the optical cement 10 provided in this embodiment is used to block light from the boundary of the display panel 20 or block other layers and devices under the cover plate 210. When the ink layer 200 is directly disposed on the surface of the cover plate 210 adjacent to the optical cement 10 (see fig. 9), and then the conventional optical cement 11 is covered on the ink layer 200 and the cover plate 210 is bonded, due to the ink layer 200 on the cover plate 210 in fig. 9, after the colloidal optical cement 11 is attached, a step difference is formed between the optical cement 11 and the ink layer 200, so that the step difference gap 12 between the cover plate 210 and the optical cement 11 is difficult to fill. In contrast, the first adhesive layer of the optical adhesive 10 provided in the embodiment of the present invention covers the ink layer when in a liquid state to form a flat surface, so that the first adhesive layer and the cover plate 210 are in planar contact, and there is no step problem.
Referring to fig. 8 again, in a further embodiment, the cover plate 210 includes a cover plate base film 211 and a hardened layer 212, which are stacked, and the cover plate base film 211 is disposed on a surface of the first glue layer 300 away from the base film 100. The hardened layer 212 serves to reinforce the strength of the cover plate 210 and protect devices below the cover plate 210.
Referring to fig. 10, in a further embodiment, the display panel 20 includes a touch layer 220, and the touch layer 220 is disposed in the base film 100 in the optical adhesive 10. Disposing the touch layer 200 in the base film 100 may reduce the thickness of the display panel 20.
In a further embodiment, display panel 20 includes polarizer 230, organic electroluminescent display layer 240, thin-film-transistor layer 250, and support film 260. The polarizer 230 is disposed on a side of the optical adhesive 10 away from the cover plate 210, the organic electroluminescent display layer 240 is disposed on a side of the polarizer 230 away from the optical adhesive 10, and the polarizer 230 is used for filtering light emitted from the organic electroluminescent device 240 to form polarized light. Thin-film transistor layer 250 is disposed on a side of organic electroluminescent display layer 240 away from polarizer 230, and support film 260 is disposed on a side of thin-film transistor layer 250 away from organic electroluminescent display layer 240.
Referring to fig. 11, the present invention further provides a method for preparing an optical adhesive 10, wherein the method for preparing the optical adhesive 10 includes step S100, step S200 and step S300. The detailed procedure is described below.
In step S100, a substrate film 100 is provided. Wherein the material of the substrate film 100 includes, but is not limited to, one of polyethylene terephthalate, polyimide, and polymethyl methacrylate. Preferably, two or more kinds are used.
In step S200, an ink layer 200 is formed on the substrate film 100, and the area of the ink layer 200 is smaller than the area of the substrate film 100. Ink layers 200 of different sizes/thicknesses may be printed on the substrate film 100 by ink printing techniques.
In step S300, a first adhesive layer 300 is formed on the base film 100, and the first adhesive layer 300 covers the ink layer 200. Preferably, the liquid first adhesive layer 300 material is print-coated on the substrate film 100 and covers the ink layer 200, and the liquid optical adhesive layer material can be more closely attached to the ink layer 200 and can be cured to be flat on the surface away from the substrate film 100, so that the interfacial adhesion between the first optical adhesive 300 and the target device or film layer to be bonded is stronger.
In a further embodiment, the method for preparing the optical adhesive 10 further includes step S400 after forming the first adhesive layer 300.
In step S400, the base film 100 is turned over, and the second glue layer 500 is formed on the surface of the base film 100 away from the first glue layer 300.
The thicknesses of the first adhesive layer 300 and the second adhesive layer 500 are less than or equal to 100 μm, and preferably controlled to be less than 50 μm, so as to ensure that the optical adhesive layer is thinner and has better bending characteristics, and the components of the optical adhesive layer include, but are not limited to, at least one of acrylic compounds, silicone compounds, rubber compounds and polyurethane compounds.
In a further embodiment, the method for preparing the optical adhesive 10 further includes step S300a between "forming the first adhesive layer 300 on the substrate film 100, the first adhesive layer 300 covering the ink layer 200" and "turning over the substrate film 100, and forming the second adhesive layer 500 on the surface of the substrate film 100 away from the ink layer 200".
In step S300a, a first release film 400 is formed on the surface of the first glue layer 300 away from the substrate film 100.
Step S500 is also included after "turning the base film 100, forming the second glue layer 500 on the surface of the base film 100 away from the first glue layer 300".
In step S500, a second release film 600 is formed on the surface of the second glue layer 500 away from the substrate film 100.
Referring to fig. 12, another method for preparing an optical adhesive 10 is provided in the present invention, wherein a second adhesive layer 500 is formed before a first adhesive layer 300. Specifically, the preparation method of the optical adhesive 10 includes steps S100-I, S200-I, S300-I and S400-I. The details are as follows.
In step S100-I, a substrate film 100 is provided.
In step S200-i, the second adhesive layer 500 is formed on the base film 100.
Step S300-i, the base film 100 is turned over, and the ink layer 200 is formed on the surface of the base film 100 away from the second glue layer 500, and the area of the ink layer 200 is smaller than that of the base film 100.
In step S400-i, the first adhesive layer 300 is formed on the substrate film 100 away from the second adhesive layer 500, and the first adhesive layer 300 covers the ink layer 200.
In a further embodiment, the method for preparing the optical adhesive 10 further includes step S200 a-i between "forming the second adhesive layer 500 on the substrate film 100" and "turning over the substrate film 100, forming the ink layer 200 on the surface of the substrate film 100 away from the second adhesive layer 500, and the area of the ink layer 200 is smaller than the area of the substrate film 100".
In step S200 a-i, a second release film 600 is formed on the surface of the second adhesive layer 500 away from the substrate film 100.
The method further includes step S500-i after "forming the first adhesive layer 300 on the substrate film 100 away from the second adhesive layer 500, and covering the ink layer with the first adhesive layer 300".
S500-i, a first release film 400 is formed on the surface of the first glue layer 300 away from the base film 100.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (21)
- An optical cement, comprising:a base film;the ink layer is arranged on the surface of the base film, and the area of the ink layer is smaller than that of the base film;the first glue layer is arranged on the base film and covers the ink layer.
- The optical glue of claim 1, wherein the substrate film includes a first ink region and a second ink region, the first ink region and the second ink region being spaced apart at opposite ends of the substrate film, the ink layer being disposed within the first ink region and the second ink region.
- An optical glue as claimed in any one of claims 1-2, characterized in that the glue further comprises:and the second adhesive layer is arranged on the surface of the base film, which is far away from the ink layer.
- An optical adhesive according to any one of claims 1 to 3, wherein the first adhesive layer is a viscosity reducing adhesive, and the interfacial adhesion of the first adhesive layer decreases when a viscosity reducing condition is satisfied, and the viscosity reducing condition includes at least one of ultraviolet light irradiation, infrared light irradiation, laser light irradiation, electric field application, force field application, magnetic field application, low temperature and heating.
- The optical glue of claim 4, wherein the first glue layer includes a photoinitiator therein, the photoinitiator being capable of initiating decomposition of molecules in the first glue layer to reduce interfacial adhesion of the first glue layer when the first glue layer is exposed to ultraviolet light.
- The optical glue of claim 4, wherein the first glue layer includes a gas initiator therein, the gas initiator being capable of cracking to generate a gas when the first glue layer is exposed to ultraviolet light to reduce interfacial adhesion of the first glue layer.
- The optical adhesive according to claim 3, wherein the second adhesive layer is an anti-adhesive layer, and the interfacial adhesion of the second adhesive layer decreases when an anti-adhesive condition is satisfied, and the anti-adhesive condition includes at least one of UV irradiation, IR irradiation, laser irradiation, electric field application, force field application, magnetic field application, low temperature and heating.
- An optical cement as claimed in any one of claims 1 to 7, wherein the surface of the first cement layer remote from the base film is planar.
- An optical glue as claimed in claim 3, further comprising:the first release film is arranged on the surface, away from the base film, of the first glue layer.
- An optical glue as claimed in claim 9, further comprising:the second is from the type membrane, the second is set up from the type membrane the second optical cement is kept away from on the surface of basement membrane.
- The optical glue of claim 10, wherein the second release film is adhered to the second glue layer with a different adhesion force than the first release film is adhered to the first glue layer.
- A display panel comprising the optical cement according to any one of claims 1 to 8.
- The display panel of claim 12, further comprising a cover plate disposed on a surface of the first glue layer of the optical glue remote from the base film.
- The display panel according to claim 13, wherein the cover plate comprises a cover plate base film and a hardened layer which are stacked, and the cover plate base film is disposed on a surface of the first glue layer away from the base film.
- The display panel of claim 13, wherein the display panel comprises a touch layer disposed in the base film in the optical glue.
- The display panel according to claim 13, wherein the display panel comprises:the polaroid is arranged on one side, far away from the cover plate, of the optical adhesive;the organic electroluminescent display layer is arranged on one side, far away from the optical glue, of the polarizer;the thin film transistor layer is arranged on one side, far away from the polaroid, of the organic electroluminescent display layer;and the support film is arranged on one side of the thin film transistor layer, which is far away from the organic electroluminescent display layer.
- The preparation method of the optical cement is characterized by comprising the following steps:providing a basement membrane;forming an ink layer on the base film, wherein the area of the ink layer is smaller than that of the base film;and forming a first adhesive layer on the base film, wherein the first adhesive layer covers the ink layer.
- The method of claim 17, wherein the method of forming the optical glue further comprises, after forming the first glue layer:and turning over the base film, and forming a second glue layer on the surface of the base film, which is far away from the first glue layer.
- The method for preparing the optical adhesive according to claim 18, wherein the method for preparing the optical adhesive further comprises, between "forming a first adhesive layer on the base film, the first adhesive layer covering the ink layer" and "turning over the base film, and forming a second adhesive layer on a surface of the base film away from the ink layer":forming a first release film on the surface of the first glue layer far away from the base film;after the step of turning over the base film and forming the second glue layer on the surface of the base film far away from the first glue layer, the method further comprises the following steps:and forming a second release film on the surface of the second adhesive layer far away from the base film.
- The preparation method of the optical cement is characterized by comprising the following steps:providing a basement membrane;forming a second glue layer on the base film;a base film is turned over, an ink layer is formed on the surface, far away from the second adhesive layer, of the base film, and the area of the ink layer is smaller than that of the base film;and forming a first adhesive layer on the base film, which is far away from the second adhesive layer, wherein the first adhesive layer covers the ink layer.
- The method according to claim 20, wherein the step of forming the optical paste between "forming the second paste layer on the substrate film" and "turning over the substrate film, wherein an ink layer is formed on a surface of the substrate film away from the second paste layer, and an area of the ink layer is smaller than an area of the substrate film" further comprises:forming a second release film on the surface of the second adhesive layer far away from the base film;after "forming a first adhesive layer on the substrate film away from the second adhesive layer, the first adhesive layer covering the ink layer", the method further includes:and forming a first release film on the surface of the first glue layer far away from the base film.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/101721 WO2020037543A1 (en) | 2018-08-22 | 2018-08-22 | Optical adhesive and preparation method therefore, and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113329877A true CN113329877A (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880094167.5A Pending CN113329877A (en) | 2018-08-22 | 2018-08-22 | Optical adhesive, preparation method thereof and display panel |
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| Country | Link |
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| CN (1) | CN113329877A (en) |
| WO (1) | WO2020037543A1 (en) |
Cited By (2)
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| CN112721380A (en) * | 2021-01-05 | 2021-04-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN114248531A (en) * | 2021-12-10 | 2022-03-29 | 维达力实业（赤壁）有限公司 | Preparation method of composite cover plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114078396A (en) * | 2021-11-30 | 2022-02-22 | 云谷（固安）科技有限公司 | Bonding method and bonding apparatus |
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| CN203093254U (en) * | 2013-01-11 | 2013-07-31 | 斯迪克新型材料（江苏）有限公司 | Double-sided adhesive tape for capacitive screen |
| CN108384471A (en) * | 2018-02-02 | 2018-08-10 | 苏州德佑胶带技术有限公司 | One kind can heavy industry adhesive tape and preparation method thereof |
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| TWI524601B (en) * | 2012-01-05 | 2016-03-01 | 宏達國際電子股份有限公司 | Cover, electronic device and manufacturing method for cover |
| TWI526895B (en) * | 2014-01-16 | 2016-03-21 | 達鴻先進科技股份有限公司 | Processing method of touch panel |
| CN204790926U (en) * | 2015-05-18 | 2015-11-18 | 深圳业际光电股份有限公司 | Touch shows product |
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2018
- 2018-08-22 CN CN201880094167.5A patent/CN113329877A/en active Pending
- 2018-08-22 WO PCT/CN2018/101721 patent/WO2020037543A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203093254U (en) * | 2013-01-11 | 2013-07-31 | 斯迪克新型材料（江苏）有限公司 | Double-sided adhesive tape for capacitive screen |
| CN108384471A (en) * | 2018-02-02 | 2018-08-10 | 苏州德佑胶带技术有限公司 | One kind can heavy industry adhesive tape and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112721380A (en) * | 2021-01-05 | 2021-04-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN112721380B (en) * | 2021-01-05 | 2022-09-09 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN114248531A (en) * | 2021-12-10 | 2022-03-29 | 维达力实业（赤壁）有限公司 | Preparation method of composite cover plate |
| CN114248531B (en) * | 2021-12-10 | 2024-02-13 | 维达力科技股份有限公司 | Preparation method of composite cover plate |
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| Publication number | Publication date |
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| WO2020037543A1 (en) | 2020-02-27 |
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