SECURITY FILM

WIPO Patent Application WO/2015/025559

A1

Provided is a security film which is useful as a security film for a plastic card or for an electronic passport, and in which visible fluorescent emission can be caused upon the irradiation with visible light. A security film (10) which is a transparent film comprising a transparent thermoplastic resin (12) and fluorescent organic silica particles (11) dispersed in the transparent thermoplastic resin (12), wherein the fluorescent organic silica particles (11) are particles each of which is composed of an organic fluorescent dye and an organic silica and has a diameter of 100 to 20000 nm and which can cause visible fluorescent emission upon the irradiation with visible light, the fluorescent organic silica particles (11) are contained in an amount of 1 × 10-6 to 6 parts by mass relative to 100 parts by mass of the transparent thermoplastic resin (12), the thickness of the security film is 30 to 500 μm, and the total light transmittance of the security film is 80% or more.

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SAKAGAMI TOSHINORI (JP)
RYU JIN-HO (KR)
LEE SE-HYUN (KR)
KIM DONG-HOO (KR)
CHAE JONG-HOON (KR)
CHO YOUNG-HEE (KR)

PCT/JP2014/060443

February 26, 2015

April 10, 2014

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JAPAN COLORING CO LTD (JP)
KOREAMINT (KR)

C08J5/18; B42D25/23; B42D25/24; B42D25/36

JP2004170751A	2004-06-17
JP2006300930A	2006-11-02
JP2011116914A	2011-06-16
JP2000348156A	2000-12-15

WATANABE, Kazuhira (JP)
Ippei Watanabe (JP)

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