Advantages of Thermoformed Stretch Film in Frozen Fish Packaging
Frozen fish, a staple aquatic product with strong global consumer demand, comes in a wide variety of species (such as cod, salmon, tilapia, and ribbonfish) and complex forms (whole fish, fillets, and chunks). Its quality is highly susceptible to factors such as low-temperature embrittlement, fat oxidation, dehydration shrinkage, fishy odor leaching, and microbial contamination during the cold chain cycle. Thermoformed stretch film, specifically designed for the characteristics of frozen fish, demonstrates significant advantages in addressing industry pain points, ensuring product quality stability, and optimizing cold chain efficiency, making it an indispensable packaging material in the frozen fish industry.
1. Excellent Low-Temperature Toughness, Adapting to Fish Forms
Frozen fish are typically stored in low-temperature environments ranging from -18°C to -40°C. Their irregular shapes—such as sharp fins, hard bones, and irregular fillet edges—pose a greater risk of puncture to packaging materials compared to other aquatic products. Traditional films are prone to brittleness and cracking at extremely low temperatures and are easily punctured by fish fins, leading to packaging failure. Our thermoformed stretch film for frozen fish uses a modified high-strength PA composite film, optimizing the material's low-temperature flexibility and puncture resistance. It tightly wraps irregularly shaped whole fish, fish fillets, and stacked fish pieces without loosening or tearing, ensuring the packaging remains intact during repeated freeze-thaw cycles and cold chain transportation.
2. Comprehensive Preservation System to Maintain Fish Quality
The core requirements for frozen fish packaging are inhibiting fat oxidation, preventing dehydration, blocking fishy odors, and inhibiting microbial growth—the thermoformed stretch film perfectly meets these needs through its multi-layered functional design. This extends the shelf life of frozen fish at -18°C to 9-15 months, 30% longer than traditional packaging. Furthermore, the film's dense structure prevents fishy odor leakage and avoids cross-contamination with other cold-stored products.
3. Highly Compatible with Automation, Improving Packaging Efficiency
Frozen fish processing companies often face the need for large-scale production of products of different sizes (e.g., quick-frozen fish fillets, vacuum-packed whole fish, and seasoned fish pieces). Optimized thermoforming stretch film offers excellent process adaptability, perfectly matching automated stretch film packaging production lines. Its balanced longitudinal and transverse stretch properties enable rapid forming and sealing, achieving production speeds of up to 90-160 packs per minute, 25% higher than ordinary films. Its superior tear resistance also reduces packaging defects caused by fishbone scratches, lowering rework rates and labor costs for businesses.
