EVOH has been the most widely used high-barrier material. In addition to the non-stretching type, the film types of this material include biaxially oriented, aluminum vapor deposition, and adhesive-coated types. Among the biaxially oriented types, there are heat-resistant types for aseptic packaging products.
The barrier properties of EVOH depend on the ethylene content. Generally speaking, when the ethylene content increases, the gas barrier properties decrease, but it is easy to process.
The remarkable feature of EVOH is that it has excellent gas barrier properties and excellent processability. In addition, it has excellent transparency, gloss, mechanical strength, stretchability, abrasion resistance, cold resistance and surface strength.
In the field of packaging, EVOH is made into a composite film intermediate barrier, which is used in all rigid and flexible packaging; in the food industry, it is used in aseptic packaging, hot cans and retort bags, packaging dairy products, meat, juice cans and Condiments; in non-food, it is used to package solvents, chemicals, air-conditioning structural parts, gasoline barrel linings, electronic components, etc. In terms of food packaging, EVOH's plastic containers can completely replace glass and metal containers. Many domestic aquatic companies use PE/EVOH/PA/RVOH/PE five-layer co-extrusion film vacuum packaging for exporting seafood. While accelerating the research of EVOH composite film, the stretching orientation of EVOH is also being studied abroad. The gas barrier performance of the new EVOH film is 3 times that of the existing high-performance non-stretch EVOH film. In addition, EVOH can also be used as a barrier material to coat other synthetic resin packaging materials to enhance the barrier properties.