$Diffractive microstructure and a method of producing the same$

Diffractive microstructure and a method of producing the same

Diffractive microstructure comprising micro-protrusions or microgrooves or a combination thereof and method of producing the same. The microstructure is formed in a layer of a thermoplastic carbohydrate polymer or a polymer derived from a carbohydrate material, said polymer having a glass transition...

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Bibliographische Detailangaben
Hauptverfasser:	Maaninen, Arto, Qvintus-Leino, Pia, Peltonen, Soili
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING COLOUR PRINTING DECORATIVE ARTS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LINING MACHINES OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPECIAL DESIGNS OR PICTURES STAMPS TRANSPORTING TYPEWRITERS WORKING CEMENT, CLAY, OR STONE WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Diffractive microstructure comprising micro-protrusions or microgrooves or a combination thereof and method of producing the same. The microstructure is formed in a layer of a thermoplastic carbohydrate polymer or a polymer derived from a carbohydrate material, said polymer having a glass transition point of less than 210° C. The thermoplastic polymer is preferably selected from the group of native starch, dextrin, native hemicellulose, native cellulose, poly(lactic acid), polylactides, polycaprolactone, starch derivatives, dextrin derivatives, hemicellulose derivatives, cellulose derivatives, and mixtures thereof. The invention provides an inexpensive and reliable way of incorporating into the products safety markings, which allow for visual inspection or detection, such as holograms and barcodes.