What are the differences between different types of aluminum foil facing?

Aluminum foil facing can be categorized into several types based on their composition and application. Type 1 is plain aluminum foil, commonly used for food packaging and general wrapping. Type 2 is aluminum foil laminated with plastic, which offers better barrier properties and is used in flexible packaging. Type 3 is aluminum foil laminated with Kraft paper, providing a sturdier material for packaging and insulation. Type 4 is aluminum foil laminated with polyethylene, which is waterproof and used for construction and insulation. Each type has unique properties, such as barrier resistance, strength, and heat resistance, making them suitable for different applications.