The present invention relates to a packing material used for wrapping an article to be packed and sealing and packing the article to be packed by heat-sealing mutually superposed end parts. The packing material is composed of a biodegradable film. Heat sealing agent layers are selectively provided in...http://www.google.com/patents/US7285318?utm_source=gb-gplus-sharePatent US7285318 - Packaging material and information recording media packaged by packaging material
