TUTCRIS - Tampereen teknillinen yliopisto


A method for manufacturing biodegradable packaging material, biodegradable packaging material, and packages and containers made thereof

Tutkimustuotos: Patentti


IPCB05D 7/ 00 A I
Prioriteetti päiväys23/10/13
TilaJulkaistu - 8 lokakuuta 2015
OKM-julkaisutyyppiH1 Myönnetty patentti


A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein a multilayer coating coextruded onto a fibrous substrate the multilayer coating comprising innermost and outermost layers of a blend comprising 20-95 wt-% of a higher melt index polylactide and 5-80 wt-% of another biodegradable polymer such as polybutylene succinate, and a middle layer containing a lower melt index polylactide alone. The goal is to increase machine speed in coextrusion while maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.