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High-temperature-resistant protective film, preparation process thereof and ITO conductive film

A technology of high temperature resistant protective film and preparation process, which is applied in the field of conductive film, can solve the problems of protective film residual glue granularity, ITO conductive film warping, and unqualified finished product quality, so as to achieve good product performance, improve process yield, The effect of ensuring smoothness

Pending Publication Date: 2021-03-09
JIANGSU RIJIU OPTOELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the particularity of the production process, the ITO conductive film needs to undergo high-temperature treatment during the production process. The high-temperature treatment process is an extremely strict test for the product. First, the glue on the protective film is prone to residual glue and granular defects during high-temperature treatment, resulting in finished products. The quality is unqualified. Second, the high temperature treatment process can easily cause warping of the ITO conductive film, seriously affecting product quality and even causing defective products.

Method used

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  • High-temperature-resistant protective film, preparation process thereof and ITO conductive film

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preparation example Construction

[0026] A preparation process for a high temperature resistant protective film, comprising the steps of:

[0027] Step 1. Unwind and spread out the protective film substrate layer. The thickness of the protective film substrate layer is 23um-188um. The high temperature test is 150℃*1h*3 times, each time standing for more than 30min, and the haze changes △H ≤3%;

[0028] Step 2. Apply a layer of adhesive layer on the protective film substrate layer by coating methods such as scraper, slit, and gravure. The adhesive layer is doped with 2-8wt% hexahydrophthalic acid dishrinkle Glyceride or acrylic adhesive layer doped with 2-8wt% diglycidyl tetrahydrophthalate;

[0029] Step 3. Dry the protective film substrate layer coated with the adhesive layer in a 30m long drying tunnel at a speed of 15-25m / min. The 30m drying tunnel is divided into 5m*6 sections, and the 1-6 section oven Temperature step setting, respectively 40-50°C, 60-70°C, 100-110°C, 125-130°C, 125-130°C, 100-110°C, th...

Embodiment 1

[0035] A kind of ITO conductive film, comprises the thick PET protective film substrate layer 10 of 75um, 15um thick doped with 5wt% hexahydrophthalate diglycidyl ester acrylic adhesive layer 11, HC layer 12, PET conductive Film substrate layer 13, ITO layer 14. This kind of ITO conductive film with high temperature resistant protective film is subjected to 150℃*1h*3 times, and after standing for 30 minutes each time, the thermal shrinkage rate TD1 and MD1 match the thermal shrinkage rate of ITO conductive film TD2 and MD2 to be 0.01%. The peel force on the HC surface is 15g / 25mm, and the dyne value on the HC surface is 36dyn. At this time, the high temperature resistant protective film for ITO has better flatness and no adhesive residue after peeling off.

Embodiment 2

[0037] A kind of ITO conductive film, comprising 125um thick COP protective film substrate layer 10, 25um thick doped with 8wt% tetrahydrophthalate diglycidyl ester acrylic adhesive layer 11, HC layer 12, COP conductive Film substrate layer 13, ITO layer 14. This kind of ITO conductive film with high temperature resistant protective film is subjected to 150℃*1h*3 times, and after standing for 30 minutes each time, the thermal shrinkage rate TD1, MD1 matches the thermal shrinkage rate of ITO conductive film TD2, MD2 is 0.06%, The peel force on the HC surface is 21g / 25mm, and the dyne value on the HC surface is 36dyn. At this time, the high temperature resistant protective film for ITO has better flatness and no adhesive residue after peeling off.

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Abstract

The invention discloses a high-temperature-resistant protective film, a preparation process thereof and an ITO conductive film, the high-temperature-resistant protective film comprises a protective film substrate layer and an adhesive layer covering the protective film substrate layer, the adhesive layer is an acrylic acid adhesive layer, wherein the adhesive layer is an acrylic acid adhesive layer doped with 2-8wt% of hexahydrophthalic acid diglycidyl ester or 2-8wt% of tetrahydrophthalic acid diglycidyl ester, and the thickness of the adhesive layer is 4-30 microns. The high-temperature-resistant protective film and an ITO conductive film using a base material of the same material have a relatively matched thermal shrinkage rate, so that the process yield can be greatly improved, the flatness of an ITO conductive film application process is ensured, and the smoothness of the ITO conductive film application process is ensured, through the ITO conductive film application process, the temperature is high, the separation or tearing difficulty of the high-temperature-resistant protective film is avoided, no residual glue is transferred to the ITO film, the product quality is ensured,the attenuation of the surface energy of the HC surface of the ITO conductive film is ensured to be small, the excellent printing performance is ensured, the process yield is high, and the product performance is better.

Description

technical field [0001] The invention relates to the field of conductive films, in particular to a high-temperature-resistant protective film, a preparation process thereof, and an ITO conductive film. Background technique [0002] The conductive film refers to a high-tech product obtained by sputtering a transparent indium tin oxide (ITO) conductive film coating on a transparent organic film material by magnetron sputtering and then undergoing high-temperature annealing treatment; the conductive film is divided into ITO conductive glass, ITO There are three types of conductive film and non-ITO conductive film; among them, ITO conductive film is the most widely used. In the manufacturing process, the surface of the main substrate of the ITO conductive film is not resistant to scratches and is easily polluted. Therefore, when making the conductive film, a specific protective film is required to prevent the surface from being scratched and polluted. [0003] Due to the particu...

Claims

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Application Information

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IPC IPC(8): C09J7/25C09J7/30C09J133/04C09J11/06H01B5/14
CPCC09J11/06C09J133/04C09J2467/006C09J2469/006C09J2479/086C09J7/20C09J7/25C09J7/30H01B5/14
Inventor 于佩强王志坚朱艳关秀娟
Owner JIANGSU RIJIU OPTOELECTRONICS LTD
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