Modified Atmosphere Packaging (MAP) is a packaging technique used to prolong the shelf life of perishable products by modifying the atmosphere within the package. The choice of film for MAP packaging depends on various factors such as the type of product, desired shelf life, and the gas composition required for preservation. Generally, there are several types of films used for MAP packaging:

1.Polyethylene (PE) Films: PE films are commonly used for MAP packaging due to their excellent sealing properties and flexibility. They can be used for a wide range of products including meat, cheese, vegetables, and snacks.

2.Polypropylene (PP) Films: PP films offer good moisture barrier properties and are often used for packaging snacks, baked goods, and dry fruits.

3.Polyethylene Terephthalate (PET) Films: PET films provide excellent clarity and barrier properties against oxygen and carbon dioxide. They are commonly used for packaging fresh produce, salads, and pre-cooked meals.

4.Ethylene Vinyl Alcohol (EVOH) Films: EVOH films have superior barrier properties against oxygen and are often used as a barrier layer in multi-layer films for MAP packaging of meat, seafood, and dairy products.

5.Nylon Films: Nylon films offer excellent oxygen barrier properties and are commonly used in multi-layer films for packaging meat, poultry, and cheese.

6.Polyvinylidene Chloride (PVDC) Films: PVDC films provide excellent oxygen barrier properties and are often used in combination with other films for packaging meat, cheese, and processed foods.

When choosing the film for MAP packaging, it's essential to consider the permeability of the film to oxygen, carbon dioxide, and moisture, as well as the specific requirements of the product being packaged. Additionally, the packaging process and equipment used should also be compatible with the selected film to ensure proper sealing and preservation of the product.