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Protective film having variable adhesive force for foldable display and foldable display device including same

A protective film and display technology, applied to film/sheet adhesives, household appliances, identification devices, etc., can solve the problem of protective film detachment

Pending Publication Date: 2022-01-21
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the adhesive strength is excessively reduced, there may be a problem of detachment of the protective film during the process of folding and unfolding the display

Method used

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  • Protective film having variable adhesive force for foldable display and foldable display device including same
  • Protective film having variable adhesive force for foldable display and foldable display device including same
  • Protective film having variable adhesive force for foldable display and foldable display device including same

Examples

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Embodiment approach

[0079] Hereinafter, the present disclosure will be described in detail with reference to examples. However, the embodiments according to the present disclosure may be modified into various forms, and the scope of the present disclosure should not be construed as being limited to the embodiments described below. The examples in this specification are provided so that those skilled in the art will more fully describe the present disclosure.

[0080] Production of (meth)acrylate resins

[0081] Production Examples 1 to 8

[0082] The components were mixed together in the amounts described in Table 1 below, and each mixture was subjected to solution polymerization to produce a (meth)acrylate resin.

[0083] [Table 1]

[0084]

[0085] In Table 1 above, 2-EHA is 2-ethylhexyl acrylate, LA is lauryl acrylate, and MA is methyl acrylate. In addition, BPMA is 4-benzoylphenyl (meth)acrylate, BPMAm is N-(2-benzoylphenyl)acrylamide, AA is acrylic acid, 4-HBA is 4-hydroxybutyl acry...

Embodiment 1

[0090] 0.03 parts by weight of an epoxy compound-based curing agent BXX-5240 was added and dispersed in the (meth)acrylate resin produced in Production Example 1, whereby an adhesive composition was prepared. Next, the adhesive composition was applied on a U483 50-μm PET film (Toray Co., Ltd.), then dried and cured to a final thickness of 25 μm, thereby manufacturing a foldable display protective film.

Embodiment 2 to 5 and comparative example 1 to 4

[0092] A foldable display protective film was manufactured in the same manner as in Example 1 above, except that a curing agent and / or a photoinitiator was added and dispersed in the (meth)acrylate resin as described in Table 2 below.

[0093] [Table 2]

[0094]

[0095] In Table 2 above, BXX-5240 is an epoxy-based curing agent, TKA-100 and MHG-80B are isocyanate-based curing agents, and IRG 184 is Irgacure 184.

[0096] Evaluation of Physical Properties

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Abstract

The present disclosure provides a foldable display protective film having variable adhesive strength and a foldable display device including the same.

Description

technical field [0001] This application claims the benefit of the filing date of Korean Patent Application No. 10-2019-0146812 filed with the Korean Intellectual Property Office on November 15, 2019, the disclosure of which is incorporated herein by reference in its entirety. [0002] The present disclosure relates to a foldable display protective film having variable adhesive strength and a foldable display device including the same. Background technique [0003] In recent years, with the development of display-related technologies, research and development have been conducted on display devices that may undergo deformation such as being folded, rolled into a roll, or elastically stretched during use. Since these displays can be transformed into various forms, they can meet the needs of increasing in size during use and reducing in size for portability. [0004] Also, recently, portable terminals such as wireless terminals, personal digital assistants (PDAs), portable mult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/30C09J133/14C09J133/08G09F9/30
CPCC09J7/255C09J7/30C09J133/14C09J133/066G09F9/301C09J2301/122C09J2467/006C09J2203/318H10K59/8722C09J7/22G09F9/30C08F220/1808C08F220/14C08F265/06C08F2/50B32B7/12B32B27/281B32B2255/26B32B27/308B32B27/40B32B2307/542B32B2255/10B32B27/365B32B2307/412B32B27/286B32B27/36B32B2307/732B32B27/325B32B27/288B32B2457/206B32B27/283B32B27/08C09J7/385C09J2433/00B32B17/06H10K77/111C08F220/06C08F220/58C08F220/1812C08F220/20C08F220/36C09J7/40B32B7/06C08F2/48C08F220/18C09J2301/312B32B7/023C08F220/1802B32B2307/54H10K50/84H10K2102/311
Inventor 刘韩率金贤哲
Owner LG CHEM LTD
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