BOPP

In the beginning of Coex BOPP flexible packaging 1979, the only way to measure shelf life of dry crackers and snacks was the moisture gain of the sealed package under tropical conditions. 38 C, 98 RH. As expected the shelf life of BOPP was less than 30 % of the one with PVDC Coated Cellophane, but by applying melted wax on the BOPP sealed areas we were able to reach and improve the shelf life against Cellophane. Then the science of Hermetic Sealed package was born, and the only way to be sure we complying it on production lines was [...]