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Different materials vary in their ability to limit passage of gases, liquids, and solids. Metals and glass (without any pinholes) are impermeable to everything, while paper is permeable to almost everything. Due to their nonpolar molecular structure, polyolefins have a very low water permeability but are readily permeable to gases such as oxygen and carbon dioxide and to hydrocarbons.

white opaque pp based thermoforming sheet

The PP/EVOH/PP film roll offers excellent puncture resistance, high clarity, and good heat resistance. It is commonly used for packaging meat, cheese, seafood, and other perishable food products. The film can also be printed with branding or product information to enhance the visual appeal of the packaging.