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    SECURITY FILM AND PROCESS FOR PREPARATION THEREOF
    1.
    发明授权
    SECURITY FILM AND PROCESS FOR PREPARATION THEREOF 有权
    SICHERHEITSFILM UND HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号：EP2329962B1

    公开(公告)日：2012-09-05

    申请号：EP08783787.8

    申请日：2008-07-29

    申请人： Shanghai Techsun Anti-Counterfeiting Technology Holding Co., Ltd.

    发明人： XU, Liangheng ,  YANG, Kai

    IPC分类号： G02B5/128 ,  C09D7/12 ,  B44F1/10 ,  B42D15/00 ,  C09D5/29

    CPC分类号： B42D25/465 ,  B32B27/08 ,  B42D25/29 ,  B42D25/45 ,  B42D2033/18 ,  B42D2033/20 ,  B42D2033/24 ,  B42D2033/30 ,  B42D2035/24 ,  B44F1/10 ,  C08K9/02 ,  C08L1/08 ,  C09D5/004 ,  C09D5/29 ,  C09D7/70 ,  G02B5/128 ,  Y10T428/24835 ,  Y10T428/2848

    摘要： Disclosed herein are an anti-counterfeiting film and process for preparation thereof. The anti-counterfeiting film comprises a directional retroreflective layer (1), an optical-angle-based color-changing information layer (2), a reflective layer (3) and a support layer (4) which are combined in this turn. The support layer (4) is made of a polymer resin material, the reflective layer (3) is made of a material with high reflectivity and has a thickness of nanoscale, the information layer (2) is made of an optical-angle-based color-changing chiral polymer material having a helical structure or made of an optical-angle-based color-changing cellulose material. The optical-angle-based color-changing chiral polymer material having a helical structure is a condensation product of a chiral compound and a compound with functional group. The optical-angle-based color-changing cellulose material is composed of a cellulose derivative and a polymerisable monomer. The directional retroreflective layer (1) is composed of spheres which are made of optical material, and is spherically embedded in the support layer (4), wherein the refractive index of the material for the directional retroreflective layer (1) is 1.9-1.93.

    摘要翻译： 本文公开了防伪膜及其制备方法。 防伪膜包括方向性回归反射层（1），基于角度的变色信息层（2），反射层（3）和支撑层（4）。 支撑层（4）由聚合物树脂材料制成，反射层（3）由具有高反射率且厚度为纳米的材料制成，信息层（2）由基于光学的 具有螺旋结构或由基于光学角度的变色纤维素材料制成的变色手性聚合物材料。 具有螺旋结构的基于光学角度的变色手性聚合物材料是手性化合物和具有官能团的化合物的缩合产物。 基于光学角度的变色纤维素材料由纤维素衍生物和可聚合单体组成。 方向回归反射层（1）由光学材料制成的球体构成，并且球形地嵌入在支撑层（4）中，其中用于定向回归反射层（1）的材料的折射率为1.9-1.93。