Polyethylene Coating: A Thin layer of polyethylene on both sides provides sturdiness. The outer layer shields the look and printing, although the interior layer functions like a sealant, earning the carton completely leakproof. The main patents for food paperboard containers day back to the beginning of the last century. They https://waterincarton.sport.blog/2025/06/09/gable-top-milk-carton-a-smarter-sip-towards-a-greener-future/