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Polyamide-imide film, method for preparing same, and covering window and display device including same

A technology of imide film and polyamide, applied in the direction of identification devices, instruments, etc., can solve the problem of damage to optical performance, achieve the effect of improving optical performance and enhancing indentation resistance

Pending Publication Date: 2022-07-29
爱思开迈克沃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, since the optical and mechanical properties are in a trade-off relationship, an improvement in the mechanical properties will compromise the optical properties

Method used

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  • Polyamide-imide film, method for preparing same, and covering window and display device including same
  • Polyamide-imide film, method for preparing same, and covering window and display device including same
  • Polyamide-imide film, method for preparing same, and covering window and display device including same

Examples

Experimental program
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Effect test

preparation example Construction

[0188] The method of preparing a polyamide-imide film according to the embodiment includes polymerizing a diamine compound, a dianhydride compound, and a dicarbonyl compound to prepare a polyamide-imide polymer solution; charging the polymer solution into a tank; extruding and casting the polymer solution and then drying it to prepare a gel sheet; and heat-treating the gel sheet.

[0189] refer to Figure 4 , the method for preparing a polyamide-imide film according to an embodiment includes: polymerizing a diamine compound, a dianhydride compound and a dicarbonyl compound to prepare a polyamide-imide polymer solution (S100); the step of charging the polymer solution into a tank (S110); the step of extruding and casting the polymer solution and then drying it to prepare a gel sheet (S200); and the step of heat-treating the gel sheet (S300).

[0190] The polyamide-imide film is a film comprising a polyamide-imide polymer. The polyamide-imide polymer is a resin including an am...

Embodiment 1

[0256] A 1-liter glass reactor equipped with a temperature-controlled double jacket was charged with dimethylacetamide (DMAc) as the organic solvent at 20°C under nitrogen atmosphere. Then, 0.2 mol of 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (TFMB) was slowly added thereto to dissolve. Thereafter, 2,2'-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6-FDA) was slowly added thereto, followed by stirring for 1 hour. Subsequently, isophthaloyl chloride (IPC) was added, followed by stirring for 1 hour. Terephthaloyl chloride (TPC) was added, followed by stirring for 1 hour, thereby preparing a polymer solution.

[0257] Subsequently, a barium sulfate dispersion (solid content: 18.2 wt %, organic solvent: DMAc) was added to the polymer solution and stirred.

[0258] The polymer solution thus obtained was applied to a glass plate, and then dried with hot air at 80° C. for 30 minutes. It was detached from the glass plate, fixed to a pin plate holder, while being stret...

Embodiment 2 to 8 and comparative Embodiment 1 and 2

[0261] A film was prepared in the same manner as in Example 1, except that the content of each reactant, the type, content and hardness of fillers, etc., were changed as shown in Table 1 below. The filler contents shown in Table 1 below are based on the total weight of the polymer.

[0262]

[0263] The following properties of the films prepared in Examples 1 to 8 and Comparative Examples 1 and 2 were measured and evaluated. The results are shown in Table 1.

[0264] Evaluation Example 1: Measurement of Film Thickness

[0265] The thickness was measured at 10 points in the transverse direction using a digital micrometer 547-401 manufactured by Mitutoyo Corporation. Their average value was used as the thickness.

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Abstract

The invention discloses a polyamide-imide film, a preparation method of the polyamide-imide film, a covering window comprising the polyamide-imide film and a display device. Embodiments relate to a polyamide-imide film having excellent optical and mechanical properties, a method for preparing the polyamide-imide film, and a cover window and a display device including the polyamide-imide film. Provided are a polyamide-imide film including a polyamide-imide polymer and having a top surface refractive modulus of 5.6 GPa or more and a haze of 1% or less as measured by a nanoindentation method according to ISO 14577-2 standard, and a method for preparing the polyamide-imide film, the polyamide-imide film including the polyamide-imide polymer and having a refractive modulus of 5.6 GPa or more and a haze of 1% or less as measured by a nanoindentation method according to ISO 14577-2 standard. And a cover window and a display device including the polyamide-imide film.

Description

technical field [0001] Embodiments relate to polyamide-imide films, methods of making the polyamide-imide films, and cover windows and display devices including the polyamide-imide films. Background technique [0002] Polyamide-imide based polymers have excellent abrasion resistance, heat resistance and chemical resistance. Therefore, they are used in applications such as primary electrical insulation, coatings, adhesives, resins for extrusion, heat resistant coatings, heat resistant boards, heat resistant adhesives, heat resistant fibers and heat resistant films. [0003] Polyamide-imide is used in various fields. For example, polyamide-imide is prepared in powder form and used as a coating for metal or magnet wire. It is mixed with other additives according to its application. In addition, polyamide-imides are used with fluoropolymers as decorative and anti-corrosion painters. It also acts to bond the fluoropolymer to the metal substrate. In addition, polyamide-imide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K3/30C08J5/18G09F9/30
CPCC08J5/18G09F9/301C08J2379/08C08K2003/3045C08K3/30C08K3/013C08G73/14C08G73/1039C08K2201/003C08K2201/011C08K3/36C08L79/08C08L2203/20B32B2264/301B32B2264/1021B32B2264/302B32B27/281B32B2457/20B32B2264/025B32B2264/104B32B2307/412C08K2201/009B32B2307/536
Inventor 崔常勋李辰雨奇贞嬉吴大成金汉俊金善焕金兴植
Owner 爱思开迈克沃有限公司
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