What is EVOH in packaging?
Ethylene Vinyl Alcohol, or EVOH, is a copolymer of ethylene and vinyl alcohol that can be used to give additional oxygen and gas barrier properties to a plastic bottle or jar. It is common in food packaging to help keep the air out and flavors in.
What is EVOH film used for?
EVOH is extensively used for atmosphere packaging where a certain atmosphere is needed inside the package to improve the shelf life of food products. In other words, EVOH film is frequently used for fresh produce when minimal permeability is needed.
What is EVOH bag?
Because of presence of EVOH layers The Grain Shield Bags are 500 times more resistant than any other plastic packaging material to atmospheric gases like oxygen, nitrogen, carbon dioxide and moisture and provide an excellent barrier against these natural elements for stored grains.
Why is EVOH a inner layer in multilayer packaging?
By using multilayer technology to manufacture our packaging products, the EVOH layer is protected from moisture by other layers and offers the ultimate oxygen barrier – even under extremely humid conditions inside or outside the packaging.
Where is EVOH made?
Industrial production Nippon Gohsei produces EVOH under the trade name Soarnol. It has production sites in Mizushima, Japan; La Porte, Texas in the USA; and at Salt End, Hull, England. Chang Chun Petrochemical produces EVOH under the trade name EVASIN.
Is EVOH transparent?
EVOH barriers have several advantages that make them the preferred choice for applications as diverse ads food packaging, agricultural film, and fuel tanks in the automotive industry: Excellent Oxygen Barrier. High Transparency.
Is EVOH film recyclable?
Since EVOH can’t be recycled, the only way to dispose of it is to throw it away with the rest of your trash that can’t be recycled.
Who makes EVOH?
Nippon Gohsei produces EVOH under the trade name Soarnol. It has production sites in Mizushima, Japan; La Porte, Texas in the USA; and at Salt End, Hull, England. Chang Chun Petrochemical produces EVOH under the trade name EVASIN. It has a single site in Taipei, Taiwan.
Why is EVOH material used in combination with other plastics in map?
However, EVOH is highly sensitive to humidity, which alters its resistance to O2 permeability [12]. Therefore, EVOH material is often combined by coextrusion with other polymeric materials, such as PP and PE, to increase barrier properties, as well as water-resistant polymers [13].
What is EVOH made from?
Ethylene vinyl alcohol (EVOH) is a formal copolymer of ethylene and vinyl alcohol. Because the latter monomer mainly exists as its tautomer acetaldehyde, the copolymer is prepared by polymerization of ethylene and vinyl acetate to give the ethylene vinyl acetate (EVA) copolymer followed by hydrolysis.
Why EVOH is oxygen barrier?
EVOH is known for having some of the best barrier resistance to gases such as oxygen, nitrogen, and carbon dioxide which makes it particularly suited for packaging food, drugs, cosmetics, and other perishable products. When compared to other common films, EVOH is considered to have superior barrier properties.
Is EVOH a moisture barrier?
When compared to other common films, EVOH is considered to have superior barrier properties. However, when exposed to moisture, EVOH loses its good gas barrier properties.
https://www.youtube.com/watch?v=0Hv0nck0IbQ