公开(公告)号：US11312794B2

公开(公告)日：2022-04-26

申请号：US16091249

申请日：2017-03-31

Applicant: Dai Nippon Printing Co., Ltd.

Inventor： Toshiki Iwasaki ,  Kazuya Honda ,  Yukimitsu Iwata

IPC: C08F2/48 ,  G02B5/30 ,  G02B1/14 ,  G02F1/1335 ,  C08F220/28 ,  C08F222/10

Abstract: According to one aspect of the present invention, a base material-less protective film used in a polarizing plate is provided, wherein the protective film comprises a core layer containing a resin made of a cured product, and an adhesion-improving layer provided on one surface of the core layer, and wherein a surface of the adhesion-improving layer forms one surface of the protective film, and the thickness of the protective film is less than 40 μm, and the tensile break strength of the protective film is 30 N/mm2 or more.

公开(公告)号：US11307339B2

公开(公告)日：2022-04-19

申请号：US17050720

申请日：2019-04-26

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Toshiki Iwasaki ,  Yoshiaki Ooyari ,  Yoshimasa Ogawa ,  Jun Sato

IPC: G02B5/30 ,  B32B27/08 ,  G02B1/14 ,  B32B27/28

Abstract: An aspect of the present invention provides an optical film 10 including a resin base material 11 and a functional layer 12, wherein a 5-μm square region on the front surface 10A of the optical film 10 is observed to have 1 or more and 50 or less depressions having any shape at least selected from a ring shape, a circular shape, and an irregular shape, when the square region is observed using an atomic force microscope after a rubber eraser abrasion test, in which the front surface 10A is rubbed 4,000 times with a rubber eraser in a reciprocating motion under a load of 500 g; the front surface 10A has a dynamic friction coefficient of 0.70 or less before the test; and the change rate of the dynamic friction coefficient of the front surface 10A between before and after the test is 35%.