Overview of Barrier Properties OTR & WVTR of Flexible Packaging
When we design a packaging solution, we can’t get away without two key indicators: OTR and WVTR. so what is OTR, what is WVTR, and what do these two indicators refer to? What is the significance of paying attention to them? Actually, all polymers have varying degrees of permeability to gases and vapours. Therefore the […]