Nhk Spring Co., Ltd.

Rp Topla Limited

Mutsumi Sasaki

Hidekazu Hoshino

Itsuo Takeuchi

Tokio Sakauchi

Tohru Ida

Naomi Iida

Tomoyoshi Sakamoto

Masahiro Arai

Rie Maejima

Masatake Ono

A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. The discrimination medium includes an optically transparent first substrate on which a cholesteric liquid crystal layer is formed, the cholesteric liquid crystal layer being formed with a fine asperity used for displaying a hologram, an optically transparent second substrate on which a print layer is formed, the print layer having a predetermined pattern made of ink and having a transparent portion without the ink of the pattern around the pattern, the pattern reflecting or absorbing a light of a predetermined wavelength, and a transparent adhesive layer, wherein the optically transparent first substrate, the optically transparent second substrate, and the transparent adhesive layer, are disposed in turn from a side checked visually.

Discrimination medium and production method therefor

A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer, having a fine asperity for forming a hologram, is formed on a transparent first substrate. A print layer composed of a black ink is formed on a transparent second substrate. The substrates are affixed to each other via a bond layer, so that a discrimination medium is obtained. In the discrimination medium, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.

A transparent plastic container which is transparent, allows good design and can be used for an anticounterfeit system that determines authenticity by visual check with the use of polarization property. A transparent plastic sheet of a polystyrene-based resin having a total light transmission of 85% or higher and a haze of 7% or less is subjected to vacuum, pneumatic or vacuum/pneumatic forming at a sheet temperature ranging from a glass transition temperature plus 50 degrees C. to a glass transition temperature plus 130 degrees C., thereby obtaining a transparent plastic container having a planar portion with a strain amount of 150 nm or less.

Transparent plastic container for anticounterfeit system

A discrimination medium for objects by which counterfeiting can be prevented, authenticity of the article can be easily and reliably determined, and the production cost can be reduced is provided. In the discrimination medium, the support bodyand the patternappear to be the same color when viewed from a specific angle (for instance, viewing from the front). On the other hand, when the viewing angle is increased, the color of the patterncomposed of a multilayer thin film changes by color shift, whereby the patternbecomes a color different from the support body

Object identifying medium using multi-layer thin-film

A breakable seal can be discriminated more easily than the conventional one. The discrimination mediumhas a cholesteric liquid crystal layer, a substrate layer, an adhesive layer, and a partial peeling layer. The discrimination mediumhas an adhesion strength Xbetween the adhesive layerand the partial peeling layer, an adhesion strength Xbetween the partial peeling layerand the cholesteric liquid crystal layer, and an adhesion strength Xbetween the cholesteric liquid crystal layerand the substrate layer. The relationships X&#x3c;Xand X&#x3c;Xare satisfied at areas, and. The relationships X&#x3c;Xand X&#x3c;Xare satisfied at areasand. In the above manner, when the discrimination mediumis peeled from the article, the discrimination mediumis separated into a discrimination mediumand a discrimination medium. For example, the above cholesteric liquid crystal layer is provided to a breakable seal, so that the breakable seal which allows confirmation of whether or not the discrimination medium is authentic before the breakable seal is broken and which allows confirmation of breakage of he breakable seal when the breakable seal is broken is provided.

Discrimination medium and article to be discriminated

The present invention provides a discrimination medium A for discriminating the authenticity of an article by providing an optically discriminating mark on the article. A filmhaving a light reflecting layer of a polymer cholesteric liquid crystal having a circular polarization light selectivity for reflecting a specific circular polarization light is fixed to a part of the surface of a support. A printed portion is made by printing on the portions other than the filmof the supportin substantially the same color as that shown when the filmis viewed from the front. The discrimination medium A appears to be red at the supportand the filmwhen viewed from the front (although the film has a metallic luster), but at a larger viewing angle, the filmchanges to blue by the blue-shift of the polymer cholesteric liquid crystal so as to exhibit a color different from that of the support

Growing community of inventors

Yokohama, Japan

Mutsumi Sasaki