In food storage and distribution, moisture is one of the primary threats to food quality. Water vapor penetration can cause food to become damp, moldy, and lose its texture, and in severe cases, lead to food safety issues. Therefore, moisture barrier performance has become a critical indicator for evaluating food-grade packaging materials.
Food-grade plastic packaging typically uses polyethylene (PE) film or polypropylene (PP) film as the base material. PE material itself has certain barrier properties, and multi-layer co-extrusion technology can significantly enhance its moisture resistance. In multi-layer structures, nylon (PA) layers and ethylene-vinyl alcohol copolymer (EVOH) layers effectively block water vapor molecules, improving overall moisture barrier performance by several times.
Aluminum foil composite materials represent another highly effective moisture barrier packaging solution. The aluminum foil layer can achieve over 99% resistance to water vapor, nearly completely blocking external moisture intrusion. This type of packaging is commonly used for moisture-sensitive foods such as nuts, biscuits, and milk powder. In practical applications, companies select appropriate packaging solutions based on the food's moisture content, shelf life requirements, and storage environment.
Baodafor's food-grade PE cling wrap and ziplock bag series use high-quality raw materials and advanced manufacturing processes, offering excellent moisture barrier and freshness-locking performance. The products are suitable for various scenarios including daily home fresh-keeping, restaurant food preparation, and frozen storage, providing reliable protection for consumers' dietary health.
