Which food packaging film is best for keeping your food fresh?
Food packaging film is a commonly used material to cover food and beverages. It is made of polyethylene terephthalate (PET) or other similar materials, and has a number of purposes. It can protect food from spoilage and contamination, help maintain flavor and color, inhibit the growth of bacteria, retard the oxidation of fats and oils, and provide a barrier between the food and the environment.
Foil (aluminum) backings offer the best barrier protection with an OTR of 0. Foil is often used in candy wrappers, and to preserve chocolate.
EVOH (ethylene vinyl alcohol) food packaging film have a OTR at .6 cc/må_. EVOH barriers are often used to package meat, fish & poultry related products.
MPET when OPP/BOPP films are laminated with metal foil (MET) it will increase the film’s oxygen & water barrier & block out UV rays. Because of the film’s stiffness, its used as a wrap for hard candies, chocolates & is resistant to heat and moisture.
KPET is a soft saran coated PET food packaging film with good transparency. It is used as a substrate to laminate with other films. KPET has excellent gas, moisture and vapor properties making suitable for packaging of dry goods and protecting fragrant related items.
PET (polyester) is very good oxygen barrier, heat resistant & strong film with good durability. PET film is an excellent laminating substrate for stand-up pouches. When PET films are laminated with metal foil it will increase the film’s oxygen- water barrier & block out UV rays. Metallized films for flexible packaging are essential when the product requires extra protection to ensure a longer shelf life MET PET provides protective properties for food items requiring restricted visibility.
Nylon films have a high melting point and are used for cooking applications such as boiling, microwaving & baking. They have very good clarity & moisture barriers & considered a very strong film.
Polypropylene is soft, clear glossy film with good moisture barriers & high oxygen transfer rates. They are often used for plastic food bags.
LLDPE barrier films are inexpensive and have good clarity. They are used to package fresh, produce, frozen foods & baked goods. Because of their high OTR of 2500 cc/må, they work well when the package requires oxygen.
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In conclusion,there is no single best food packaging film for keeping food fresh, as the right film for each individual product will depend on its specific characteristics. However, films like Mylar and polypropylene are both strong and flexible, making them good choices for products that need to be opened often, like produce. So if you’re looking to keep your food fresher for longer, choose a film that suits your needs!
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