The barrier performance of EVOH depends on the ethylene content. Generally speaking, when the ethylene content increases, the gas barrier decreases, but it is easy to process.
The remarkable characteristics of EVOH are excellent barrier to gas and excellent processability, in addition to transparency,gloss, mechanical strength, stretchability, wear resistance, cold resistance and surface strength are excellent.
In the field of packaging, EVOH is made into a composite membrane intermediate barrier layer, which is used in all hard and soft packaging. In the food industry for sterile packaging, hot cans and cooking bags, packaging dairy products, meat, canned juices and condiments; In non-food, it is used for packaging solvents, chemicals, air conditioning structural parts, gasoline barrel lining, electronic components, etc. In terms of food packaging, EVOH plastic containers can completely replace glass and metal containers. Many domestic aquatic products companies export seafood using PE/EVOH/PA/RVOH/PE five layers of extruded film vacuum packaging. At the same time of accelerating the research of EVOH composite film, the EVOH stretching orientation is also being studied abroad. The gas barrier performance of the new EVOH film is three times that of the existing high performance non-stretching EVOH film. In addition, EVOH can also be used as a barrier material coated on other synthetic resin packaging materials to enhance the barrier performance. EVOH products can not only be used in the production of film, but also can be widely used in the soft packaging of cosmetics, floor heating pipes, jelly cups and pesticide bottles. As an environmentally friendly material, EVOH can not only improve people's quality of life, but also play an important role in environmental protection.
Applications: Barrier structures containing EVOH resin are used in all rigid and flexible packaging and all types of food
processing including aseptic, heat injection and pressure cooking. Products packaged with EVOH-containing materials are: condiments (soy sauce), tomato sauces, juices, edible batter, meat products, cheese products and processed fruits.