Upm-kymmene Corporation

Upm-kymmene Oyj Corporation

Walki Group Oy

Heikki Korpela

Hannu Karhuketo

Juuso Rinkinen

Juho Hyytiäinen

Saija Kotala

The lid structure for a food packaging container comprises a paper-based body layer and, on the side that is to be against the packaging container, plastic layers that function as a barrier and as heat-sealable layers. The lid structure comprises, as the plastic layers attached to the body layer, one or more layers of biodegradable plastic, such as polylactide and/or polyhydroxy alkanoate and on their outer side, the outermost layer, which is formed of biodegradable ester copolymer, to whose ester parts a comonomer has been linked by ester or amide bonds.

Foodstuff package coverstructure

A plastic laminate with two or more plastic layers, at least one of which is polyhydroxyalkanoate, such as hydroxybutyrate/hydroxyvalerate copolymer. Next to the polyhydroxyalkanoate layer and attached to it is a layer of biodegradable polyester amide.

Plastic laminate

Growing community of inventors

Valkeakoski, Finland

Heikki Korpela