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Light-diffusing barrier film

A blocking film and light diffusion technology, applied in optics, optical filters, optical components, etc., can solve the problems of expensive, blocking material damage, and not easy to increase the area

Active Publication Date: 2020-11-24
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the barrier film is produced by a dry coating method such as vapor deposition, it has the advantage of excellent film uniformity compared with wet coating, but is expensive and does not easily increase the area
In addition, dry coating and wet coating can be done during the roll-to-roll method, where a lot of pressure is applied during winding or unwinding of the film to transfer the film to the roll At the same time, the barrier material may be damaged, and as a result, the barrier properties of the film may deteriorate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0195] 1) Form a light diffusion layer on the base layer

[0196] A light-diffusing layer coating composition containing 20 parts by weight of the photocurable resin relative to the solvent was prepared. Specifically, 80 parts by weight of pentaerythritol triacrylate (PETA) and 20 parts by weight of dipentaerythritol hexaacrylate (DPHA) were dissolved in a solvent (propylene glycol monomethyl ether). To this solution, 4 parts by weight of polymerization initiator (Irgacure 127, Ciba), 5 parts by weight of antistatic agent (ELEC ME-2, Kao) and 10 parts by weight of particles (MX80, Soken) with an average particle size of 0.8 μm were added to A light-diffusing layer composition is prepared.

[0197] It was applied on one side of a polyethylene terephthalate (PET) film (T600E50, Mitsubishi) having a thickness of 50 μm by bar coating (using a #5 rod) method. Thereafter, the obtained coating film was heated and dried at 100° C. for 2 minutes, and then subjected to vacuum UV light...

Embodiment 2

[0207] The light-diffusing barrier film of Example 2 was produced in the same manner as in Example 1, except that another coating bar was used (#4 bar was used) when coating the light-diffusing layer composition. The surface roughness (Rt) values ​​of the light-diffusing layer are shown in the table below.

Embodiment 3

[0209] The light-diffusing barrier film of Example 3 was produced in the same manner as in Example 1, except that no antistatic agent was used, and another coating bar was used when coating the light-diffusing layer composition (using #3 bar ). The surface roughness (Rt) values ​​of the light-diffusing layer are shown in the table below.

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Abstract

The present application relates to a light-diffusing barrier film. The film is an integrated film comprising, in order, a barrier layer, a base layer and a light-diffusing layer. The film can preventmoisture ingress into a device such as an organic light emitting device, and also provides the device with a light-diffusing function. Particularly, the film can have excellent moisture barrier properties even after a roll-to-roll process.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2018-0044337 filed on April 17, 2018 and Korean Patent Application No. 10-2019-0044610 filed on April 17, 2019, the disclosure of which is passed This reference is incorporated herein in its entirety. technical field [0003] The present application relates to light diffusion barrier films and methods of making the same. In particular, the present application relates to an integral film including both a barrier layer and a light diffusing layer and a method of making the same using a roll-to-roll process. Background technique [0004] Devices including organic light emitting materials or light sources such as backlight units have a problem of reduced durability when exposed to moisture or oxygen. Therefore, barrier films can be used in such devices to protect the device from the external environment. In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02B1/14H01L51/50B32B27/08B32B27/28
CPCG02B1/14G02B1/16G02B5/0226G02B5/0221H10K59/871H10K59/877G02B5/20B32B27/08B32B27/28B32B2307/538B32B2255/10B32B2307/40B32B2457/206C08K5/0075C09D133/14C09D183/16H10K50/844H10K50/854H10K71/00H10K2102/351
Inventor 丁喜俊黄樯渊朴宝拉慎晟真梁熙旺
Owner LG CHEM LTD
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