Polyethylene Coating: A Skinny layer of polyethylene on each side supplies toughness. The outer layer protects the design and printing, while the internal layer acts being a sealant, creating the carton absolutely leakproof. The main patents for foodstuff paperboard containers date again to the beginning of the last century. They https://share.evernote.com/note/b0a0ca9c-9d1b-7129-6089-9b3a7535c26c