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1. WO2020116335 - SURFACE PROTECTION FILM FOR FLEXIBLE DISPLAY

Publication Number WO/2020/116335
Publication Date 11.06.2020
International Application No. PCT/JP2019/046708
International Filing Date 29.11.2019
IPC
B32B 27/40 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
40comprising polyurethanes
G09F 9/00 2006.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
9Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
Applicants
  • バンドー化学株式会社 BANDO CHEMICAL INDUSTRIES, LTD. [JP]/[JP]
Inventors
  • 鎌田 穣 KAMADA Yutaka
  • 山口 昌大 YAMAGUCHI Masahiro
Agents
  • 山田 泰之 YAMADA Yasuyuki
  • 長谷部 善太郎 HASEBE Zentaro
  • 中村 理弘 NAKAMURA Masahiro
Priority Data
2018-22795705.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) SURFACE PROTECTION FILM FOR FLEXIBLE DISPLAY
(FR) FILM DE PROTECTION DE SURFACE POUR ÉCRAN FLEXIBLE
(JA) フレキシブルディスプレイ用表面保護フィルム
Abstract
(EN)
The present invention addresses the problem of providing a surface protection film for a flexible display in which a crease is not easily put. As a solution, provided is the surface protection film for a flexible display that has a protection layer made of polyurethane as an outermost surface thereof, the polyurethane having a stress relaxation rate of 30% or less when elongated by 50% for 300 seconds.
(FR)
L'invention a pour objet de fournir un film de protection de surface pour écran flexible tel que des marques de pli sont peu susceptibles d'y rester. À cet effet, l'invention fournit un film de protection de surface pour écran flexible qui possède sur sa face superficielle une couche protectrice constituée de polyuréthane, et qui présente un taux de relaxation de contrainte inférieur ou égal à 30% après 300 secondes d'un étirement à 50% dudit polyuréthane.
(JA)
折り目が残りにくいフレキシブルディスプレイ用の表面保護フィルムを提供することを課題とする。解決手段として、ポリウレタンからなる保護層を最表面に有し、前記ポリウレタンの50%伸長300秒後における応力緩和率が、30%以下であるフレキシブルディスプレイ用表面保護フィルムを提供する。
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