EVOH (Ethylene vinyl alcohol copolymer)
EVOH has been a high barrier material with many applications. In addition to the non-stretch type, there are biaxially oriented, aluminum vapor-coated, and adhesive-coated film types, and the heat-resistant biaxially oriented type is used for aseptic packaging products.
The barrier property of EVOH depends on the content of ethylene. Generally speaking, when the content of ethylene increases, the gas barrier property decreases, but it is easy to process.
EVOH is characterized by good gas barrier properties and good processability, in addition to transparency, gloss, mechanical strength, stretchability, abrasion resistance, cold resistance and surface strength are very good.
In the field of packaging, EVOH is made into a composite film intermediate barrier layer, used in rigid and flexible packaging; in the food industry for aseptic packaging, hot cans and cooking bags, packaging of dairy products, meats, canned fruit juices and spices; in the non-food aspects of the packaging of solvents, chemicals, air-conditioning structural components, gasoline drum lining, electronic components and so on. In food packaging, EVOH plastic containers can replace glass and metal containers, a number of domestic aquatic companies export seafood on the use of PE/EVOH/PA/EVOH/PE five-layer co-extruded film vacuum packaging. In accelerating the research of EVOH composite film at the same time, foreign countries are also studying the EVOH stretch orientation, the new EVOH film on the gas barrier performance for the existing high-performance non-stretch EVOH film 3 times. In addition, EVOH can also be used as a barrier material coated in other synthetic resin packaging materials, to enhance the effect of barrier properties.
EVOH products can be used not only in the production of film, but also in a large number of cosmetic flexible packaging, floor heating tubes, jelly cups and pesticide bottles, etc. As a non-toxic and environmentally friendly material, EVOH not only improves people’s quality of life, but also plays an important role in environmental protection.
Post time: Aug-07-2024