Application of plastic sheets in frozen and refrigerated packaging

PP, PS and PET sheets are widely used in frozen and refrigerated food packaging, but each has its own characteristics and applicable conditions.

PP (polypropylene): PP sheet is often used in food packaging due to its high heat resistance (up to 130°C, melting point up to 200°C) and safety. It is the only plastic material that can be heated in a microwave oven, which makes PP sheets particularly popular in food packaging that needs to be heated or heated after freezing. Widely used in aviation and high-speed rail catering, prepared dishes, and takeaway packaging. In addition, PP sheets also have good sealing properties, which help extend the shelf life of food and ensure food safety.

PS (polystyrene): PS sheet is mainly known for its good cold resistance and is often used to make disposable food packaging boxes such as bowls of instant noodle and fast food. Although PS sheet is not suitable for high-temperature environments or microwave heating, its excellent cold resistance makes it an ideal choice for frozen food packaging, mainly used for various clean meats such as mutton rolls, beef rolls, steaks, and pasta such as quick-frozen Dumplings, steamed buns and other packaging. In addition, the excellent toughness of PS sheet makes it a perfect material for yogurt’s FFP packaging system.

PET (polyethylene terephthalate): PET sheet is more common in quick-frozen food packaging because of its good cold resistance and low temperature resistance and relatively low cost. This material is not only suitable for the packaging needs of frozen food, but also plays an important role in maintaining the freshness and taste of food. In addition, PET sheet has good transparency and mechanical strength, non-toxic and environmentally friendly properties, transparent and glossy appearance and excellent sealing properties, and is also widely used in food packaging. The application of PET sheet improves the preservation effect and safety of food, making it an ideal choice in the era of environmental protection and health.

To sum up, the application of PP, PS and PET sheets in frozen and refrigerated food packaging has their own emphasis. PP sheets are suitable for packaging that requires heating due to their high heat resistance, while PS sheets are suitable for packaging due to their excellent cold resistance. It is suitable for frozen food packaging, while PET sheets occupy a place in food packaging due to its environmentally friendly and non-toxic properties. Choosing the right material depends on the specific way the food will be preserved and consumed.

In addition, other material structures such as PET/PE, BOPP/PE, BOPP/CPP, etc. are also used in frozen food packaging. These materials also have good moisture-proof, cold-resistant and low-temperature resistance, and meet the requirements of frozen food packaging. Basic requirements. When selecting frozen food packaging materials, in addition to considering the performance of the material, you also need to consider factors such as the type of food, shelf life, storage conditions, and cost to ensure the safety and freshness of the food.