Discussion
The most common and least expensive plastic film used for packaging of solid food materials is
Answer: A
The most common and cheapest film is Polyethylene.
Low-density polyethylene film is inexpensive, tough, flexible, heat-sealable and a good barrier to water vapour, which makes it the most widely used packaging film for bread, produce, frozen foods and many other solid foods.
Polypropylene film (especially oriented PP) is clearer and stiffer and is used for snack packs, but costs more. Polystyrene is mostly used for rigid trays and cups rather than film, and PVC film, used as cling wrap, is more expensive and raises concerns about plasticiser migration.
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