Upm-kymmene Corporation

Upm-kymmene Oyj Corporation

Yhtyneet Paperitehtaat Oy

Hannu Karhuketo

Heikki Korpela

Alpo A Pollari

Pentti K Rautanen

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

Biodegradable multilayer material

The invention concerns a paper-based, soft or semi-hard sheet material which contains a core layer of compressed shredded paper with surface layers. The material is suited for use as inner end shields for paper reels, for example.

Growing community of inventors

Valkeakoski, Finland

Hannu Karhuketo