Invention Grant
- Patent Title: Optical layered body
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Application No.: US16317388Application Date: 2017-07-10
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Publication No.: US10564324B2Publication Date: 2020-02-18
- Inventor: Tomoyuki Horio , Masataka Nakashima , Hiroshi Nakamura , Takahisa Nomura , Seiji Shinohara , Kiyotaka Matsui , Kentaro Oshima , Satoshi Kuboyama , Yukihiro Ono
- Applicant: Dai Nippon Printing Co., Ltd. , Dexerials Corporation
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: Dai Nippon Printing Co., Ltd.,DEXERIALS Corporation
- Current Assignee: Dai Nippon Printing Co., Ltd.,DEXERIALS Corporation
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JP2016-138984 20160713
- International Application: PCT/JP2017/025166 WO 20170710
- International Announcement: WO2018/012464 WO 20180118
- Main IPC: G02B1/115
- IPC: G02B1/115 ; G02B1/14 ; G02B5/00

Abstract:
The present invention aims to provide an optical layered body that has excellent interlayer adhesiveness, particularly even in outdoor use, and also has highly excellent anti-blocking properties. The present invention relates to an optical layered body including: a substrate film; a hard coat layer containing silica fine particles on at least one surface of the substrate film; and a dry film layer on a surface of the hard coat layer opposite to the substrate film side surface of the hard coat layer, wherein the silica fine particles are exposed on the dry film layer side surface of the hard coat layer; the dry film layer is directly formed on the surface of the hard coat layer on which the silica fine particles are exposed; the hard coat layer before the formation of the dry film layer has projections and depressions on the surface on which the dry film layer is to be formed; the hard coat layer has an average silica fine particle abundance in ten 0.2 μm×0.2 μm regions of 30 to 80% and a standard deviation of silica fine particle abundances in the 10 regions of 1 to 7, where the 10 regions are randomly selected from a cross section of the hard coat layer in the thickness direction within the range from the dry film layer side interface to 10% of the thickness in the thickness direction; and the hard coat layer has a silicon atom abundance A of 2 to 10% on the surface opposite to the substrate film side surface as determined by X-ray photoelectron spectroscopy.
Public/Granted literature
- US20190227195A1 OPTICAL LAYERED BODY Public/Granted day:2019-07-25
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