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Low-dielectric high-strength flexible transparent conductive film special for folding screen

A transparent conductive film, low dielectric technology, applied in the direction of cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, conductors, etc., can solve the problem of good adhesion between the conductive layer and the substrate, and difficult Balance, separation of silver wire layer and substrate, etc., to ensure high refractive optical properties, good adhesion and reliability, and solve the effect of bending performance

Active Publication Date: 2020-07-10
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it is difficult to achieve good adhesion between the conductive layer and the substrate by spraying or coating the nano-silver wire layer on the surface of existing substrates such as PET, COP or aramid, and silver will appear in the long-term bending process. Separation between wire layer and substrate
Therefore, it is difficult to achieve a good balance in the aspects of low dielectric property, flexibility, stiffness, resilience, and adhesion of the conductive layer in the transparent conductive film developed by the patents reported, which leads to the development of flexible transparent screens. Among them, because the transparent conductive film is immature, the service life or bending life cannot meet the requirements

Method used

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  • Low-dielectric high-strength flexible transparent conductive film special for folding screen
  • Low-dielectric high-strength flexible transparent conductive film special for folding screen
  • Low-dielectric high-strength flexible transparent conductive film special for folding screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Synthesis of Naphthalene Cyclic Polyethylene Glycol Acrylate

[0031] In solvent A, add naphthalene ring-type tetrafunctional epoxy resin (HP-4700 from DIC Japan), polyethylene glycol methacrylate and basic catalyst, react at 80°C for 1 hour, and then purify To obtain naphthalene ring type polyethylene glycol acrylate, the mass ratio of naphthalene ring type tetrafunctional epoxy resin, polyethylene glycol methacrylate and basic catalyst is 1:1:0.01, and its synthetic route is as follows:

[0032]

[0033] where n is 5;

[0034]The basic catalyst is triethylamine, and the solvent A is formamide.

[0035] (2) Synthesis of Naphthyl Polythiol

[0036] Add 9,9-Bis(6-hydroxy-2-naphthyl)fluorene (CAS number: 934557-66-1), ethylene sulfide, basic catalyst and solvent A together, the reaction temperature is 60°C, and the reaction After 2 hours, naphthyl thiol can be obtained, wherein the mass ratio of 9,9-Bis (6-hydroxy-2-naphthyl) fluorene, ethylene sulfide, basic ca...

Embodiment 2

[0044] (1) Synthesis of Naphthalene Cyclic Polyethylene Glycol Acrylate

[0045] In solvent A, add naphthalene ring-type tetrafunctional epoxy resin (HP-4700 from DIC Corporation of Japan), polyethylene glycol methacrylate and basic catalyst, react at a temperature of 120°C for 4 hours, and then purify To obtain naphthalene ring-type polyethylene glycol acrylate, the mass ratio of naphthalene ring-type tetrafunctional epoxy resin, polyethylene glycol methacrylate and basic catalyst is 1:5:0.04, and its synthetic route is as follows:

[0046]

[0047] where n is 15;

[0048] The basic catalyst is potassium carbonate, and the solvent A is tetramethylethylenediamine.

[0049] (2) Synthesis of Naphthyl Polythiol

[0050] Add 9,9-Bis(6-hydroxy-2-naphthyl)fluorene (CAS number: 934557-66-1), ethylene sulfide, basic catalyst and solvent A together, the reaction temperature is 120°C, and the reaction After 5 hours, naphthyl permethyl polythiol can be obtained, wherein the mass ra...

Embodiment 3

[0058] (1) Synthesis of Naphthalene Cyclic Polyethylene Glycol Acrylate

[0059] In solvent A, add naphthalene ring-type tetrafunctional epoxy resin (HP-4700 from DIC Japan), polyethylene glycol methacrylate and basic catalyst, react at 100°C for 3 hours, and then purify Obtain naphthalene ring type polyethylene glycol acrylate, wherein the mass ratio of naphthalene ring type tetrafunctional epoxy resin, polyethylene glycol methacrylate and basic catalyst is 1:3:0.03, and its synthetic route is as follows:

[0060]

[0061] where n is 10;

[0062] The basic catalyst is sodium carbonate, and the solvent A is dioxane.

[0063] (2) Synthesis of Naphthyl Polythiol

[0064] Add 9,9-Bis(6-hydroxy-2-naphthyl)fluorene (CAS number: 934557-66-1), ethylene sulfide, basic catalyst and solvent A together, the reaction temperature is 100°C, and the reaction After 3 hours, naphthyl thiol can be obtained, wherein the mass ratio of 9,9-Bis (6-hydroxy-2-naphthyl) fluorene, ethylene sulfid...

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Abstract

The invention relates to a low-dielectric high-strength flexible transparent conductive film special for a folding screen. The conductive film is characterized by being prepared by fully and uniformlymixing naphthalene ring type polyethylene glycol acrylate, naphthyl polymercaptan, an acrylate diluent, a mercaptan diluent, silver nanowires and a photoinitiator, then the spraying liquid is sprayedon the release film; in an oven with the temperature of 40-60 DEG C, a 365-400 nm LED ultraviolet lamp is adopted, irradiation is conducted for 30-120 s at the energy of 200-500 mW / cm <2>, then the cured film material is stripped from release paper, and the low-dielectric high-strength flexible transparent conductive film special for the folding screen can be obtained. The conductive film has thecharacteristic of rigid-flexible combination, does not have creases and creep deformation after being bent for multiple times for a long time, is very low in dielectric property, and has good adhesive force and reliability.

Description

technical field [0001] The invention belongs to the field of flexible transparent conductive films, in particular to a low-dielectric high-strength flexible transparent conductive film dedicated to folding screens. Background technique [0002] There is a layer of transparent electrodes in the touch screen of smartphones. Most of the current transparent electrodes are made of indium tin oxide (ITO), and its transparency can reach 92%, which is equivalent to glass. But this ITO indium tin oxide film is fragile and cannot be used in flexible electronic devices or displays. With the development of smart phones, curved screens and even folding screens are being gradually promoted. Traditional ITO transparent conductive films cannot meet the requirements, and the industry is gradually developing flexible transparent conductive films. [0003] Three technical solutions based on metal grids, graphene and nano-silver wires are being researched and gradually commercialized, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L81/02C08K7/06C08J5/18C08G81/00C08G75/08H01B1/22H01B5/16H01B13/00
CPCC08G75/08C08G81/00C08J5/18C08J2387/00C08J2481/02C08K2201/001C08K2201/011H01B1/22H01B5/16H01B13/00
Inventor 刘锋陈燕舞叶瑞庭张浥琨
Owner SHUNDE POLYTECHNIC
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