Polyethylene Coating: A thin layer of polyethylene on each side offers toughness. The outer layer guards the design and printing, when the internal layer acts like a sealant, generating the carton totally leakproof. The primary patents for meals paperboard containers day back to the start of the last century. They https://share.evernote.com/note/c5252fab-4a7f-53e8-1966-299c5e8039ed