What are the excellent properties of EVOH we produce?

EVOH's Excellent Nitrogen Barrier Properties

Compared to its superior oxygen barrier properties, EVOH exhibits even better nitrogen barrier properties, exceeding double that of oxygen. This property is particularly important for many nitrogen-sealed foods, as sausages and hams sliced thinly in a central factory cannot be sold in supermarkets. These foods are typically packaged in trays or foil and filled with nitrogen before sealing. The sealed EVOH packaging not only blocks oxygen ingress but also allows the food interior to be filled with nitrogen, extending its shelf life.

EVOH's excellent carbon dioxide barrier properties.

Generally, carbonated beverages containing CO2 bubbles are sold in glass bottles. PET, the first packaging material to be tried, can only store water and soft drinks with little or no CO2, and it cannot be stored for long periods of time. The reason is that relatively high levels of CO2 permeate all known polymers: CO2 is significantly more soluble in organic matter than oxygen or nitrogen. This is also true for EVOH, but the permeability is still much lower than other resins, at approximately 1/50th that of PET. As a result, co-extruded PET/EVOH/PET bottles are gaining market favor. They offer a longer shelf life without altering the flavor or foam quality, and are even replacing aluminum cans for beer. These packaging materials are recyclable (the materials can sometimes be used as raw materials for other products), making them very environmentally friendly. Furthermore, this approach helps balance glass and aluminum resources.