Material selection for frozen seafood packaging bags

●  Polyethylene (PE) packaging bag

Polyethylene (PE) is the most common basic material in frozen seafood packaging bags. PE material has good flexibility and sealing properties, which can effectively prevent the penetration of water vapor and air, thereby maintaining the freshness of seafood. Although its moisture and cold resistance are not the best, it performs well in daily waterproofing and withstanding freezing and low temperatures. In addition, PE material is economical, making it the first choice for many seafood merchants.

●  Nylon/Polyethylene (PA/PE) Composite Packaging Bag

For seafood products that require higher protective performance, nylon/polyethylene composite materials have become a better choice. Nylon, with its excellent toughness and puncture resistance, can remain calm when facing sharp shells of seafood, ensuring the integrity of packaging bags. Meanwhile, the cold resistance of polyethylene enhances the performance of this composite material in long-distance transportation and frozen storage.

●  Polypropylene (PP) packaging bag

Polypropylene (PP) material is also suitable for packaging frozen seafood. PP material has excellent sealing and low temperature resistance, and will not harden or break even at low temperatures, making it very suitable for refrigeration, freezing, and cooking. This material not only maintains the freshness of seafood, but also effectively prevents the penetration of oxygen, moisture, and odors, thereby extending the shelf life of seafood.

●  Polyvinylidene chloride (PVDC) coated film packaging bag

PVDC coated film packaging bags are an ideal choice for catering experts who pursue taste and high-end routes, or for seafood gift markets that value quality. It can meet the strict requirements for freshness, keeping seafood fresh even after long-term storage.

●  Other precautions

When choosing frozen seafood packaging bags, in addition to paying attention to the material, the following points should also be particularly noted :

○  Sealing performance: A packaging bag with good sealing performance can effectively prevent the penetration of oxygen, moisture, and odors, thereby extending the shelf life of seafood. Therefore, when choosing packaging bags, special attention should be paid to whether their sealing performance meets the requirements.

○  Thickness and elasticity: The thickness and elasticity of packaging bags are also important factors affecting the protective effect. A packaging bag with moderate thickness and good elasticity can better protect the quality of seafood such as sea bass.

○  Food grade material: Ensure that the selected packaging bag material is food grade to ensure food safety.