What are the common materials for making food packaging bags

Common materials for making food packaging bags include:

• PE: It has good flexibility, moisture resistance, and chemical stability, and is commonly used to make simple mouth bag packaging.
• PP: It has high heat resistance and mechanical strength, suitable for food packaging that requires high temperature treatment or has certain strength requirements.
• PA: High strength, good toughness, and good barrier properties to gases and fragrances.
• Paper: Good printability and beautiful appearance, but poor moisture and water resistance
• PET: High transparency, good mechanical properties, strong barrier properties, commonly used to increase the aesthetic and protective performance of packaging.
• Aluminum: It has excellent barrier properties and can effectively block light, oxygen, and water vapor. It is commonly used in food packaging that requires high barrier requirements, such as coffee, milk powder, etc.
• Composite materials: Usually, the above materials are combined together through multi-layer composite to integrate the advantages of various materials and meet the diverse packaging performance requirements of different foods.
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    The selection of these materials will be determined based on factors such as the nature of the food, shelf life requirements, cost budget, and functional requirements of the packaging.