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1. (WO1998053115) PACKAGING MATERIAL

Pub. No.:    WO/1998/053115    International Application No.:    PCT/CH1998/000200
Publication Date: Fri Nov 27 00:59:59 CET 1998 International Filing Date: Fri May 15 01:59:59 CEST 1998
IPC: C23C 14/10
C23C 28/00
G02B 1/10
Applicants: ALUSUISSE TECHNOLOGY & MANAGEMENT AG
LOHWASSER, Wolfgang
ZEITER, Patrik
Inventors: LOHWASSER, Wolfgang
ZEITER, Patrik
Title: PACKAGING MATERIAL
Abstract:
The invention relates to packaging or packaging devices with an integrated first- opening or authenticity guarantee, consisting of a substrate (10) and a single or multiple series of coatings applied thereto. Moulded packaging made of deep-drawn material, or foil-like material such as metal foil, plastic laminate, paper or similar, can be used as a substrate (10). Said substrate has a surface (11) which reflects visible light. This reflecting surface (11) is covered with a single or multiple series of one or more coatings (12, 14, 16), for example of a compound with formula SiOx in which x is a number between 1.5 and 2, with a thickness of 50-2000 nm (nanometers). The free surface of the SiOx coating has a reflecting metal coating (13, 15, 17) which is semipermeable to visible light and has a thickness of 0.2-60 nm (nanometers). Light striking the coated substrate is reflected, and the reflected light is perceived in different colours in accordance with the direction or angle of observation.