Title:
表面保護フィルム用基材、該基材の製造方法、該基材を用いた表面保護フィルム、および表面保護フィルム付光学フィルム
Document Type and Number:
Japanese Patent JP7341643
Kind Code:
B2
Abstract:
The present invention provides a substrate for a surface protective film, which has excellent flexibility or bending resistance, and can favorably suppress light leakage, coloring, and rainbow stains during optical inspection. The substrate for the surface protective film of the present invention is composed of a film comprising an acrylic resin and an elastomer, has in-plane retardation Re (550) of 30 nm or less, and the number of bending times to break in the MIT test is 500 or more. A method for manufacturing the substrate for the surface protective film of the present invention comprises: molding of a film forming material comprising the acrylic resin and the elastomer into a film; and sequential biaxial stretching or simultaneous biaxial stretching of the molded film.
Inventors:
Ayumu Nakahara
Toru Shimizu
Toru Shimizu
Application Number:
JP2018159535A
Publication Date:
September 11, 2023
Filing Date:
August 28, 2018
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
C08J5/18; B29C55/12; B32B27/00; B32B27/30; C08F8/48; C08F220/18; C09J7/25; C09J7/38
Domestic Patent References:
| JP2016156961A | ||||
| JP2018087834A | ||||
| JP2009270021A | ||||
| JP2019172948A | ||||
| JP2020007515A | ||||
| JP2008127479A |
Foreign References:
| WO2016185722A1 |
Attorney, Agent or Firm:
Takafumi Momii