CN112280505B - UV (ultraviolet) glue, preparation method thereof and display device - Google Patents

UV (ultraviolet) glue, preparation method thereof and display device Download PDF

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Publication number
CN112280505B
CN112280505B CN202011160675.4A CN202011160675A CN112280505B CN 112280505 B CN112280505 B CN 112280505B CN 202011160675 A CN202011160675 A CN 202011160675A CN 112280505 B CN112280505 B CN 112280505B
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display device
functional film
main body
body part
organic molecules
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CN112280505A (en
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李朝
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/10—Homopolymers or copolymers of methacrylic acid esters
    • C09J133/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/52—Amides or imides
    • C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
    • 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
    • C09J105/00—Adhesives based on polysaccharides or on their derivatives, not provided for in groups C09J101/00 or C09J103/00
    • C09J105/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/08—Homopolymers or copolymers of acrylic acid esters
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/24—Homopolymers or copolymers of amides or imides
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides

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  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The application provides a UV glue and a preparation method and a display device thereof, wherein the UV glue comprises the following components in percentage by mass: a body portion, 99% -99.9%; and a UV curing agent: 0.1% -1%; the main body part is provided with two or more organic molecules, and the copolymer formed by the organic molecules has a self-healing function. The main part that this application UV glued can be: the copolymer formed by methyl methacrylate and n-butyl acrylate, or the copolymer formed by molybdenum disulfide nano particles and hyaluronic acid composite hydrogel, or the copolymer formed by acrylamide and diacetone acrylamide has good self-healing effect.

Description

UV (ultraviolet) glue, preparation method thereof and display device
Technical Field
The application relates to the technical field of display, in particular to UV glue, a preparation method of the UV glue and a display device.
Background
In recent years, the development of Organic Light Emitting Diode (OLED) display technology has been rapidly advanced, and OLED products have the advantages of lightness, thinness, fast response, wide viewing angle, high contrast, flexibility and the like, so that the OLED display technology has received more and more attention and applications, and is mainly applied to the display fields of mobile phones, flat panels, televisions and the like.
Terminal Bending (Pad Bending) of a display panel is an important technology in the field of OLED panels, particularly in the field of OLED mobile phones, and is widely applied to narrow frames and full screens. However, during the terminal bending process, the metal traces (e.g., source/drain traces) are easily broken, which results in a decrease in panel quality. How to improve the process capability of bending the terminals of the display panel is a direction of common efforts in the industry.
Disclosure of Invention
The invention aims to provide a UV adhesive, a preparation method thereof and a display device, and aims to solve the technical problem that the quality of a panel is reduced due to the fact that metal wires are broken because terminal areas of an OLED display panel are prone to being broken in the bending process.
In order to achieve the purpose, the invention provides UV glue which comprises the following components in percentage by mass: a body portion, 99% -99.9%; and a UV curing agent: 0.1% -1%; the main body part is provided with two or more organic molecules, and the copolymer formed by the organic molecules has a self-healing function.
Further, in the main body part, the organic molecules are methyl methacrylate and n-butyl acrylate, the methyl methacrylate and the n-butyl acrylate can be polarized with each other, induced dipole moment is generated, and mutually attracted to form a copolymer, and the molar ratio of the methyl methacrylate to the n-butyl acrylate is 9:11-11: 9; or
In the main body part, the organic molecules are molybdenum disulfide nanoparticles and hyaluronic acid composite hydrogel, the molybdenum disulfide nanoparticles and the hyaluronic acid composite hydrogel form a copolymer, and the molar ratio of the molybdenum disulfide nanoparticles to the hyaluronic acid composite hydrogel is 1:99-10: 90; or
In the main body part, the organic molecules are acrylamide and diacetone acrylamide, acylhydrazone reversible covalent bonds are directly formed by utilizing ketone carbonyl and amide bonds to construct a polymer with sol-gel inversion characteristics, and the molar ratio of the acrylamide to the diacetone acrylamide is 2:3-1: 4.
In order to achieve the above object, the present invention further provides a method for preparing the UV glue according to the above, which is characterized by comprising the following steps:
obtaining 99-99.9% of main body part and 0.1-1% of UV curing agent according to mass fraction; the main body part is provided with two or more organic molecules, and a copolymer formed by the organic molecules has a self-healing function; and
and stirring and mixing the main body part and the UV curing agent uniformly to form a copolymer, and then carrying out vacuum bubble removal treatment to obtain the UV adhesive.
Further, when obtaining the main body part, obtaining methyl methacrylate and n-butyl acrylate as the main body part according to a molar ratio of 9:11-11: 9; or the molybdenum disulfide nano particles and the hyaluronic acid composite hydrogel are obtained according to the molar ratio of 1:99-10:90 as a main body part; or obtaining acrylamide and diacetone acrylamide according to the molar ratio of 2:3-1: 4;
when the main body part and the UV curing agent are stirred and mixed uniformly, the methyl methacrylate and the n-butyl acrylate can be polarized with each other, and an induced dipole moment is generated and mutually attracted to form a copolymer; or the molybdenum disulfide nanoparticles and the hyaluronic acid composite hydrogel form a copolymer; or the acrylamide and the diacetone acrylamide directly form acylhydrazone reversible covalent bonds by utilizing a ketone carbonyl group and an amide bond to construct a polymer with sol-gel inversion characteristics.
To achieve the above object, the present invention also provides a display device including: at least one function rete, a surface coating of function rete has foretell the solidification of UV glue form the UV glue film, works as when fracture breach appears in the UV glue film, organic molecule in the UV glue film can make fracture breach self-healing.
Further, the functional film layer comprises a display area, a terminal area and a binding area, wherein the terminal area is arranged between the display area and the binding area; and the UV adhesive layer covers the terminal area to form a bending part.
Further, the display device further includes: the polaroid is attached to the display area of the functional film layer; and the chip on film covers the binding area of the functional film layer.
Further, the blocking force of the UV glue layer is greater than or equal to 2000 gf/inch.
Further, the display device further includes: the adhesive layer is arranged below the functional film layer; the first back plate is arranged between the functional film layer and the adhesion layer; the second back plate is arranged on the same layer as the first back plate and is arranged at a position corresponding to the binding region of the functional film layer; when the terminal area of the functional film layer and the UV adhesive layer bear external force to form the bent part, the second back plate is attached to the lower surface of the adhesion layer.
Further, the display device further includes: and the foam is arranged on the upper surface of the UV adhesive layer.
The invention has the technical effects that the invention provides the UV adhesive, the preparation method thereof and the display device, wherein the main body part of the UV adhesive can be as follows: the copolymer formed by methyl methacrylate and n-butyl acrylate, or the copolymer formed by molybdenum disulfide nano particles and hyaluronic acid composite hydrogel, or the copolymer formed by acrylamide and diacetone acrylamide has good self-healing effect. The copolymer formed by methyl methacrylate and n-butyl acrylate has self-healing capability, and the ester group and the hydrolyzed carboxyl group can be polarized with each other to generate induced dipole moment and attract each other to form hydrogen bonds, so that the self-healing effect is achieved. The copolymer formed by the molybdenum disulfide nanoparticles and the hyaluronic acid composite hydrogel has self-healing capability, and the copolymer is formed by mainly utilizing the good photo-thermal property of the molybdenum disulfide nanoparticles and the good temperature sensitivity of the hyaluronic acid composite hydrogel, so that the copolymer has self-healing performance under near-infrared stimulation. The copolymer formed by acrylamide and diacetone acrylamide has self-healing capability, and is mainly characterized in that an acylhydrazone reversible covalent bond is directly formed by using a ketone carbonyl group and an amide bond to construct a pH response type polymer with sol-gel reversible characteristics, so that the polymer has self-healing performance.
Furthermore, the display device disclosed by the invention has the advantages that the terminal area of the functional film layer is coated with the UV adhesive to form the UV adhesive layer, the UV adhesive has a self-healing function, the metal wiring of the terminal area can be effectively protected, the bending performance of the display device is improved, and the display quality of the display device is improved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a functional diagram of self-healing of the UV glue layer in embodiment 1 of the present application.
Fig. 2 is a schematic structural diagram of a display device according to embodiment 1 of the present application before bending.
Fig. 3 is a schematic structural view of a UV adhesive layer having a notch according to embodiment 1 of the present application.
Fig. 4 is a schematic structural diagram of a gap self-healing of the UV glue layer in embodiment 1 of the present application.
Fig. 5 is a schematic structural diagram of the display device of embodiment 2 of the present application after bending.
The components of the drawings are identified as follows:
100 a display device;
11 a functional film layer; 12. 12a, 12bUV glue layers;
13 a polarizer; 14 a chip on film;
15 an adhesive layer; 16 a first back plate;
17 a second back plate; 18, soaking cotton;
111 a display area; 112 terminal area;
113 a binding region; 140 a drive IC;
201, a bending part.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.
Example 1
The embodiment provides a UV glue, which comprises the following components in percentage by mass: a body portion, 99% -99.9%; and a UV curing agent: 0.1 to 1 percent. The main body part is made of a self-healing high polymer material and is provided with two or more organic molecules, and the organic molecules can be polarized with each other to generate induced dipole moment and attract each other to form a copolymer. In the embodiment, the mass fraction of the UV curing agent is 0.1% to 1%, which mainly enables the UV glue to have a good curing effect in the curing process, and avoids the phenomenon of too fast or too slow curing speed.
In the main body portion, the organic molecules are methyl methacrylate and n-butyl acrylate.
The methyl methacrylate has a chemical formula of C5H8O2It is an organic compound, also called MMA, abbreviated as methyl ester. Methyl methacrylate is a monomer for producing the transparent plastic polymethyl methacrylate (i.e., plexiglass, PMMA).
The n-butyl acrylate copolymer has a chemical formula of C7H12O2Also called n-BA, is mainly used as an organic synthesis intermediate, an adhesive and an emulsifier.
In this example, when the molar ratio of methyl methacrylate to n-butyl acrylate is 9:11 to 11:9, the molecules between methyl methacrylate and n-butyl acrylate are polarized with each other at room temperature, and the force inducing dipole moment and attracting each other is strongest, so that the UV adhesive has self-healing ability maintained by intermolecular van der waals force.
As shown in fig. 1, fig. 1 is a functional diagram of a self-healing UV adhesive layer according to an embodiment of the present disclosure. When the UV adhesive is irradiated by UV light, the transparent UV adhesive layer 12a is formed through curing, the UV adhesive layer 12a is provided with a gap A, and the UV adhesive has the self-healing capacity, so that the UV adhesive layer 12a is self-repaired into the UV adhesive layer 12b according to the attractive interaction of the van der Waals force among molecules. Specifically, the main body part of the UV adhesive is mainly a copolymer (PMMA-nBA) of the methyl methacrylate and the n-butyl acrylate, and the copolymer has self-healing capability, mainly because the ester group and the hydrolyzed carboxyl group of the copolymer can be polarized with each other, and an induced dipole moment is generated and mutually attracted to form a hydrogen bond, so that the UV adhesive layer can achieve the self-healing effect.
The embodiment also provides a preparation method of the UV glue, which comprises the following steps S1) -S2).
S1) obtaining 99-99.9% of main body part and 0.1-1% of UV curing agent according to mass fraction; the main body part is provided with two or more organic molecules, and the copolymer formed by the organic molecules has a self-healing function. Specifically, methyl methacrylate and n-butyl acrylate were obtained as the main fractions at a molar ratio of 9:11 to 11: 9.
In the embodiment, the mass fraction of the UV curing agent is 0.1% to 1%, which mainly enables the UV glue to have a good curing effect in the curing process, and avoids the phenomenon of too fast or too slow curing speed.
S2) stirring and mixing the main body part and the UV curing agent uniformly to form a copolymer, and then carrying out vacuum bubble removal treatment to obtain the UV adhesive.
Specifically, the methyl methacrylate, the n-butyl acrylate and the UV curing agent are stirred and mixed uniformly, the methyl methacrylate and the n-butyl acrylate can be polarized with each other to generate induced dipole moment and attract each other to form a copolymer, and then vacuum bubble removal treatment is carried out to obtain the UV adhesive.
Specifically, the UV adhesive has self-healing capability, and is mainly characterized in that in the process of forming a copolymer of methyl methacrylate and n-butyl acrylate, ester groups and hydrolyzed carboxyl groups can be polarized with each other to generate induced dipole moment and attract each other to form hydrogen bonds, so that the self-healing effect is achieved.
In this example, methyl methacrylate and n-butyl acrylate were obtained as the main portion in a molar ratio of 9:11 to 11:9 when the main portion was obtained. Preferably, either 45 moles of methyl methacrylate and 55 moles of n-butyl acrylate are obtained, or 55 moles of methyl methacrylate and 45 moles of n-butyl acrylate are obtained. In this example, when the molar ratio of methyl methacrylate to n-butyl acrylate is 9:11 to 11:9, the molecules between methyl methacrylate and n-butyl acrylate are polarized with each other at room temperature, and the force inducing dipole moment and attracting each other is strongest, so that the UV adhesive has self-healing ability maintained by intermolecular van der waals force.
As shown in fig. 2-4, fig. 2 is a schematic structural view of the display device of embodiment 1 of the present application before bending; FIG. 3 is a schematic view of a UV adhesive layer having a notch according to example 1 of the present application; fig. 4 is a schematic structural diagram of a gap self-healing of the UV glue layer in embodiment 1 of the present application.
Specifically, the present embodiment further provides a display device 100, which includes a functional film 11, a UV paste 12, a polarizer 13, a flip-chip film 14, an adhesive layer 15, a first back plate 16, and a second back plate 17.
Specifically, the at least one functional film 11 includes a display region 111, a terminal region 112 (i.e., a Pad region), and a Bonding region 113(Bonding Pad), and the terminal region 112 is disposed between the display region 111 and the Bonding region 113. The functional film layer 11 is a display panel, which includes an array substrate and a color film substrate, and has a good display function.
The UV glue layer 12 is formed on the upper surface of the terminal area 112 of the functional film layer 11. Specifically, the UV glue is coated on the upper surface of the terminal area 112 of the functional film layer 11 and cured to form the UV glue layer 12. In the present embodiment, the UV glue layer 12 covers the terminal region 112 of the functional film 11 to form the bending portion 201 of the display device 100. The UV glue layer 12 is used to protect metal traces (e.g., source/drain traces) in the terminal region 112 of the functional film 11 from breaking due to stress during the bending process, so as to affect the yield of the display device.
In this embodiment, the adhesion force of the UV adhesive layer 12 is greater than or equal to 2000gf/inch, so that the UV adhesive layer 12 is tightly attached to the terminal area 112, that is, the gap between the metal traces is filled, and the phenomenon of peeling between the UV adhesive layer 12 and the functional film layer 11 is prevented, thereby further protecting the metal traces and reducing the risk of wire breakage.
The polarizer 13 is attached to the display region 111 of the functional film 11. The polarizer 13 is typically made of a flexible material, such as Polyimide (PI) material.
A Chip On Flex (Chip On Flex) 14 covers the bonding region 113 of the functional film 11. Wherein a driving IC140 is attached on the chip on film 14.
The adhesive layer 15 is provided below the functional film layer 11. The material of the adhesive layer 15(Foam) is a Foam adhesive tape, which has good adhesive effect.
The first back sheet 16 is disposed between the functional film layer 11 and the adhesive layer 15. The first back plate 16 is disposed on the lower plate of the functional film 11 and is used for supporting the functional film 11.
The second back plate 17 and the first back plate 16 are disposed on the same layer and are disposed at a position corresponding to the binding region of the functional film 11. The second back plate 17 is used for supporting the bonding region 113 of the functional film layer 11.
In the present embodiment, the first and second back plates 16 and 17 may be formed of metal, such as stainless steel (SUS), or polymer, such as Polymethylmethacrylate (PMMA), Polycarbonate (PC), Polyacrylate (PA), polyvinyl alcohol (PVA), Acrylonitrile Butadiene Styrene (ABS), polyethylene terephthalate (PET).
As shown in fig. 2 to 4, when the display device 100 is bent, that is, when the terminal region 112 of the functional film layer 11 and the UV layer 12 form a bent portion 201 when being subjected to an external force, the second back sheet 17 is attached to the lower surface of the adhesive layer 15. In the bending process, the outermost UV adhesive layer 12a of the bent portion 201 is easily broken and has a gap a under the action of a stress, however, the UV adhesive layer 12a has a self-healing capability at room temperature, so that the gap a can be self-healed to an original form, that is, the UV adhesive layer 12b is formed. At this time, the UV glue layer 12b tightly wraps the terminal area 112 of the functional film layer 11, so that the stress can be effectively prevented from directly acting on the metal wiring of the terminal area 112, thereby avoiding the occurrence of undesirable phenomena such as bright lines or dark lines of the display device 100 due to the broken metal wiring, and effectively improving the bending performance of the display device 100.
This embodiment provides a display device, glues through the terminal area coating UV at the function rete and forms the UV glue film, and this UV glues and has the self-healing function, can protect the metal in terminal area effectively and walk the line, improves display device's the performance of buckling to improve display device's demonstration quality.
Example 2
The present embodiment provides a display device 100, which includes all the technical solutions of embodiment 1, and further includes foam.
As shown in fig. 5, fig. 5 is a schematic structural view of the display device of application example 2 after being bent. The display device 100 further comprises foam 18 disposed on the upper surface of the UV glue layer 12. The foam 18 is attached to the upper surface of the UV glue layer 12, which is beneficial to reducing the stress on the bending portion 201. In this embodiment, the bending portion 201 of the display device 100 includes the foam 18.
Specifically, the UV glue layer 12 can closely adhere the terminal area 112 of the functional film layer 11 to the foam 18, and therefore, when the display device 100 is bent, the foam 18 can avoid the UV glue layer 12 from being broken, thereby effectively preventing the metal wires in the terminal area from being broken, further improving the bending performance of the display device, and improving the display quality of the display device.
Example 3
The present embodiment provides a UV gel, a method for preparing the same, and a display device, including most of the technical solutions of embodiment 1, and the difference is that the organic molecule of the main body portion of the present embodiment includes a molybdenum disulfide nanoparticle and a hyaluronic acid composite hydrogel.
In this embodiment, the molar ratio of the molybdenum disulfide nanoparticles to the hyaluronic acid composite hydrogel is 1:99-10:90, and the mass concentration of molybdenum disulfide is 0.1% -1%. When the molar ratio of the molybdenum disulfide nanoparticles to the hyaluronic acid composite hydrogel is 1:99-10:90, a copolymer is formed by utilizing the good photo-thermal property of the molybdenum disulfide nanoparticles and the good temperature sensitivity of the hyaluronic acid composite hydrogel, and the copolymer has self-healing performance under near-infrared stimulation. Therefore, in the display device, the upper surface of the terminal area of the functional film layer is coated with the UV glue layer, so that the formed UV glue layer has good self-healing capability, the bent metal wiring of the display device is not broken in the bending process, the display device is not prone to undesirable phenomena such as bright lines or dark lines, and the bending performance of the display device is effectively improved.
Example 4
This example provides a UV glue, including most of the technical solutions of example 1, except that the organic molecules of the main portion of this example include Acrylamide (AM) and diacetone acrylamide (DAAM), wherein the molar ratio of the acrylamide to the diacetone acrylamide is 2:3-1: 4.
The main part of the UV glue is mainly a copolymer (PAM-co-PDAAM) formed by the acrylamide and the diacetone acrylamide. When obtaining the main part, obtaining the acrylamide and the diacetone acrylamide as the main part according to a molar ratio of 2:3-1: 4. Preferably, 40 moles of acrylamide and 60 moles of diacetone acrylamide are obtained, or 20 moles of acrylamide and 80 moles of diacetone acrylamide are obtained.
When the molar ratio of the acrylamide to the diacetone acrylamide is 2:3-1:4, acylhydrazone reversible covalent bonds are directly formed by utilizing a ketone carbonyl group and an amide bond at room temperature to construct a PH-responsive polymer (namely gel) with sol-gel reversible characteristics, wherein the gel has self-healing performance. Therefore, in the display device, the upper surface of the terminal area of the functional film layer is coated with the UV glue layer, so that the formed UV glue layer has good self-healing capability, the bent metal wiring of the display device is not broken in the bending process, the display device is not prone to undesirable phenomena such as bright lines or dark lines, and the bending performance of the display device is effectively improved.
The UV glue, the preparation method thereof, and the display device provided in the embodiments of the present application are described in detail above, and the principle and the implementation manner of the present application are explained in the present application by applying specific examples, and the description of the above embodiments is only used to help understanding the technical scheme and the core concept of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (8)

1. The UV adhesive is characterized by comprising the following components in percentage by mass:
a body portion, 99% -99.9%; and
UV curing agent: 0.1% -1%;
the main body part is provided with two or more organic molecules, and a copolymer formed by the organic molecules has a self-healing function;
in the main body part, the organic molecules are methyl methacrylate and n-butyl acrylate, the methyl methacrylate and the n-butyl acrylate can be polarized with each other, an induced dipole moment is generated, and the methyl methacrylate and the n-butyl acrylate are mutually attracted to form a copolymer, and the molar ratio of the methyl methacrylate to the n-butyl acrylate is 9:11-11: 9; or
In the main body part, the organic molecules are molybdenum disulfide nanoparticles and hyaluronic acid composite hydrogel, the molybdenum disulfide nanoparticles and the hyaluronic acid composite hydrogel form a copolymer, and the molar ratio of the molybdenum disulfide nanoparticles to the hyaluronic acid composite hydrogel is 1:99-10: 90; or
In the main body part, the organic molecules are acrylamide and diacetone acrylamide, acylhydrazone reversible covalent bonds are directly formed by utilizing ketone carbonyl and amide bonds to construct a polymer with sol-gel inversion characteristics, and the molar ratio of the acrylamide to the diacetone acrylamide is 2:3-1: 4.
2. The preparation method of the UV adhesive according to claim 1, characterized by comprising the following steps:
obtaining 99-99.9% of main body part and 0.1-1% of UV curing agent according to mass fraction; the main body part is provided with two or more organic molecules, and a copolymer formed by the organic molecules has a self-healing function; and
stirring and mixing the main body part and the UV curing agent uniformly to form a copolymer, and then carrying out vacuum bubble removal treatment to obtain UV glue;
wherein, upon obtaining the body portion,
obtaining methyl methacrylate and n-butyl acrylate as main parts according to a molar ratio of 9:11-11: 9; or the molybdenum disulfide nano particles and the hyaluronic acid composite hydrogel are obtained according to the molar ratio of 1:99-10:90 as a main body part; or obtaining acrylamide and diacetone acrylamide according to the molar ratio of 2:3-1: 4;
when the main body part and the UV curing agent are stirred and mixed uniformly,
the methyl methacrylate and the n-butyl acrylate can be polarized with each other, so that an induced dipole moment is generated and mutually attracted to form a copolymer; or the molybdenum disulfide nanoparticles and the hyaluronic acid composite hydrogel form a copolymer; or the acrylamide and the diacetone acrylamide directly form acylhydrazone reversible covalent bonds by utilizing a ketone carbonyl group and an amide bond to construct a polymer with sol-gel inversion characteristics.
3. A display device, comprising:
at least one functional film layer, one surface of the functional film layer is coated with the UV adhesive according to claim 1 and is cured to form a UV adhesive layer, and when a fracture notch appears in the UV adhesive layer, organic molecules in the UV adhesive layer can enable the fracture notch to be self-healed.
4. The display device according to claim 3,
the functional film layer comprises a display area, a terminal area and a binding area, wherein the terminal area is arranged between the display area and the binding area;
and the UV adhesive layer covers the terminal area to form a bending part.
5. The display device according to claim 4, further comprising:
the polaroid is attached to the display area of the functional film layer; and
and the chip on film covers the binding region of the functional film layer.
6. The display device according to claim 3, wherein the adhesion force of the UV adhesive layer is greater than or equal to 2000 gf/inch.
7. The display device according to claim 5, further comprising:
the adhesive layer is arranged below the functional film layer;
the first back plate is arranged between the functional film layer and the adhesion layer; and
the second back plate is arranged on the same layer as the first back plate and is arranged at a position corresponding to the binding region of the functional film layer;
when the terminal area of the functional film layer and the UV adhesive layer bear external force to form the bent part, the second back plate is attached to the lower surface of the adhesion layer.
8. The display device according to claim 3, further comprising:
and the foam is arranged on the upper surface of the UV adhesive layer.
CN202011160675.4A 2020-10-27 2020-10-27 UV (ultraviolet) glue, preparation method thereof and display device Active CN112280505B (en)

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