Thanks to our merit – to be a specialist with personal approach – CONROP, s.r.o. succeeded in developing and producing a bag with inner liner with barrier properties. These are liners with EVOH, polyamide or aluminium layer which lends barrier properties as moisture, oxygen and gas proofness to the bag. These multifunctional barrier properties of the sheets are achieved by co-extrusion of combinations of special polymers used in the sheets. Thanks to them, the sheets are resistant, do not let oxygen, gas and moisture through, and have good mechanical properties: strength, flexibility, formability. The sheets are carefully selected, purchased, formed and designed for our products by us. Bags with such sewn-in, inserted or glued-in liners are suitable for packaging of products with requirement for resistance to the environment, especially packaging of food additives and feed, or hygroscopic granulates and other chemical products.