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Flexible Laminated Film and Display Device Comprising Same

A flexible layer, lamination technology, applied in the direction of lamination device, lamination, identification device, etc., can solve the problem of not being able to meet the flexible display device, etc., and achieve the effects of excellent process performance, excellent pencil hardness, and excellent flexibility

Pending Publication Date: 2021-08-31
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Korean Granted Patent No. 10-1415838 relates to a hard coating composition, and discloses the method of forming a first hard coating layer and a second hard coating layer on both sides of a supporting substrate by using the hard coating composition. Hard coatings, however, do not actually meet the bendability and flexibility standards for commercialization of flexible display devices, especially foldable display devices.

Method used

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  • Flexible Laminated Film and Display Device Comprising Same
  • Flexible Laminated Film and Display Device Comprising Same
  • Flexible Laminated Film and Display Device Comprising Same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0111] Preparation Example 1: Preparation of Hard Coat Forming Composition

[0112] Use a stirrer to mix 10 parts by weight of urethane acrylate (10 functions, Miwon Corporation, SC2153), 10 parts by weight of pentaerythritol triacrylate, and 50 parts by weight of nano-silica sol (12nm, 40% solids, catalyst Chemical into company, V8802), 20 weight parts of methyl ethyl ketone (Oi Kakin), 7 weight parts of propylene glycol monomethyl ether (Oi Kao Jin), 2.7 weight parts of photoinitiator (Shiba company, I-184) and 0.3 parts by weight of a leveling agent (BYK Chemie, BYKUV3570), and then filtered using a filter made of PP material to prepare a composition for forming a hard coat layer.

preparation example 2

[0113] Preparation Example 2: Preparation of Hard Coat Forming Composition

[0114] Use a mixer to mix 5 parts by weight of urethane acrylate (10 functional, Meiyuan Special Chemicals, SC2153), 37 parts by weight of pentaerythritol triacrylate, 20 parts by weight of propylene glycol monomethyl ether, 2.7 parts by weight of light An initiator (Shiba, I-184) and 0.3 parts by weight of a leveling agent (BYK Chemie, BYKUV3570) were filtered using a filter made of PP to prepare a composition for forming a hard coat layer.

[0115] Examples and Comparative Examples: Preparation of Hard Coated Lamination Films

Embodiment 1

[0117] A laminated film was prepared by bonding a polyimide film (30 μm, first substrate layer) and a polyimide film (40 μm, second substrate layer) with an acrylic adhesive layer (5 μm thickness). Then, the composition of Preparation Example 1 was coated on the first substrate layer so that the thickness after hardening was 10 μm, and then the solvent was dried and UV hardened to form a hard coat layer, thereby producing a hard coat laminate membrane.

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Abstract

The present invention relates to a flexible laminated film including a first substrate layer, an adhesive layer or a pressure-sensitive adhesive layer, a second substrate layer, and a hard coating layer, and to a display device including the flexible laminated film.

Description

technical field [0001] The present invention relates to a flexible laminated film and a display device including the same. Background technique [0002] With the increase in performance and popularization of portable display devices such as smartphones and tablet PCs, research on them has also become intense. For example, commercial research and development of lightweight flexible (bendable or foldable) portable display devices are underway. A portable display device such as a liquid crystal display includes a protective window for protecting a display module such as a liquid crystal layer. Today, most portable display windows use windows that include a rigid glass substrate. However, glass is easily shattered due to external impact, is easily broken and has no flexibility when used in a portable display device or the like, and thus cannot be applied to a flexible display device. Therefore, people try to replace the protective window with a plastic film in the display dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/06B32B27/28B32B27/32B32B27/36B32B7/12B32B33/00G09F9/30
CPCB32B27/08B32B27/281B32B27/325B32B27/36B32B7/12B32B33/00G09F9/301B32B2255/10B32B2255/26B32B2457/20B32B2457/202B32B2457/204B32B37/1284B32B2307/412B32B2250/40B32B2037/1253B32B2307/546B32B2307/536B32B27/308B32B27/306B32B2250/02B32B3/263B32B2307/54B32B27/34B32B2307/732B32B27/286B32B27/302B32B27/285B32B23/08B32B27/32B32B27/38B32B27/40B32B23/20B32B27/365B32B27/288B32B23/22B32B27/304B32B2250/24B32B2250/03B32B2305/72
Inventor 金圣敏金拏延
Owner DONGWOO FINE CHEM CO LTD
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