Teknologian Tutkimuskeskus Vtt Oy

Valtion Teknillinen Tutkimuskeskus

Teknologian Tutkimuskeskus Vtt

Arto Maaninen

Tiina Maaninen

Markus Tuomikoski

Pia Qvintus-Leino

Soili Peltonen

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&#xb0; 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.

Diffractive microstructure and a method of producing the same

Ink is manufactured by mixing unoxidized metallic particles to a binder. The ink is printed on an object and hardened for forming a conductor. The process is performed in an inert atmosphere or in vacuum for maintaining the electrical conductivity of the conductor.

Conductive ink and conductor

Ink is manufactured by mixing unoxidized metallic particles to a binder. The ink is printed on an object () and hardened for forming a conductor. The process is performed in an inert atmosphere or in vacuum for maintaining the electrical conductivity of the conductor ().

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Oulu, Finland

Arto Maaninen