MULTILAYER PROTECTIVE ELEMENT AND METHOD OF ITS OBTAINING Russian patent published in 2018 - IPC B42D25/328 B32B27/20 

FIELD: physics.

SUBSTANCE: multilayer protective element contains an optically transparent film, on one side of which a layer with a regulated adhesion is applied, a thermoplastic polymer composition for forming micro - and nano-relief elements of the flat optics by the embossment, and an embossed rainbow hologram, a layer with a high refractive index. In the thermoplastic layer, the embossing method forms a relief of the diffraction structure organized by the type of a reflective phase diffraction grating. On top of the layer with a high refractive index, an information layer with obvious and hidden elements is applied, then a photopolymeric layer with a bulk record of the interference structure is applied, on top of which a layer of the paint composition and an adhesive layer are consistently applied.

EFFECT: increasing not less than twice the degree of identifiability, security, reliability of visual inspection of the authenticity and integrity, the essential difficulty of forgery, the high durability and efficiency of protective properties.

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