1. Aluminum Foil Lining: The Ultimate Barrier
Aluminum foil lining is one of the most important functional layers in food paper packaging boxes. It is primarily used to provide excellent barrier properties.
Gas and light barrier: Aluminum foil has extremely high barrier properties, effectively preventing oxygen and light from affecting the product, preventing food oxidation and spoilage, and extending shelf life.
Moisture-proof and waterproof: The aluminum foil layer can prevent external moisture from penetrating into the packaging box, maintaining a dry environment, which is especially suitable for moisture-sensitive foods.
Heat exchange and conductivity: Aluminum foil is not only a barrier layer but also has heat exchange and conductive properties, often used in food packaging that requires heat packaging or heating.
Printed aluminum foil packaging bags
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2. PE Lining: The Safety Guardian for Liquid Foods
PE (polyethylene) lining is a key material in food paper packaging boxes to prevent liquid leakage.
Leak prevention: The main function of PE lining is to prevent liquid leakage from fluid foods (such as sauces and beverages), ensuring the integrity of the packaging box.
Sealing: PE lining is usually bonded to the cardboard using an adhesive. This structure ensures the sealing of the packaging box during transportation, preventing leakage of contents or external contamination.
Food safety: PE is a food-grade material, safe and harmless in contact with food, and meets the hygiene requirements of food packaging.
