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Food Spoilage
Plastics and Polymers

What is plastic wrap made out of?


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October 22, 2010 1:39PM


Plastic wrap is a form of food packaging consisting of a thin film of flexible, transparent polymer that clings to itself and to food containers to form a tight seal. The plastic keeps the food fresh by protecting it from air and by preventing dry foods from absorbing moisture and wet foods from losing moisture. It also seals in odors to prevent them from spreading to other foods stored nearby.

Plastics are artificial polymers; that is, they consist of gigantic molecules formed by combining thousands of small molecules of the same kind into a long chain. These small molecules are known as monomers, and the process of combining them is known as polymerization. Natural polymers include such familiar substances as silk, rubber, and cotton.

Read more: How plastic wrap is made - material, manufacture, making, used, processing, components, product, Raw Materials, The Manufacturing Process of plastic wrap, Quality Control