Film Structure: PET/PE & BOPP/PE
A Frozen Fish & Food Packaging Pouch utilizing PET/PE and BOPP/PE film structures is a practical, cost-effective flexible packaging solution designed for frozen seafood and various frozen food products. These two-layer laminated structures provide essential moisture protection, reliable sealing, and sufficient mechanical strength to withstand the demanding conditions of frozen food storage, transportation, and handling. While offering moderate barrier properties, these pouches are ideal for products with standard shelf-life requirements and represent an economical choice for mainstream frozen food packaging.
Outer Layer: PET (Polyethylene Terephthalate)
Thickness: 12–25 μm
Primary Functions:
Provides structural integrity and puncture resistance
Offers excellent printing surface for branding and product information
High gloss finish enhances shelf appeal
Good dimensional stability across temperature variations
Key Properties:
Tensile strength: 150–250 MPa
Moisture barrier: Moderate
Cold crack resistance: Below –40°C
Surface energy: 42–48 dynes/cm (ideal for printing)
Inner Layer: PE (Polyethylene – LDPE/LLDPE)
Thickness: 50–100 μm
Primary Functions:
Heat-sealable food-contact layer
Primary moisture barrier protection
Maintains flexibility at freezing temperatures
Provides grease resistance for fatty products
Key Properties:
Seal strength: 10–18 N/15mm
WVTR: 5–15 g/m²/day
Operating temperature: –40°C to 80°C
FDA-compliant for direct food contact
Bonding Technology:
Solvent-based or solvent-free adhesive lamination
Bond strength: ≥ 4 N/15mm at –30°C
Delamination resistance during freeze-thaw cycles
Outer Layer: BOPP (Biaxially Oriented Polypropylene)
Thickness: 20–35 μm
Primary Functions:
Superior moisture barrier properties
High clarity for product visibility
Excellent stiffness for easy handling
Good chemical resistance
Key Properties:
WVTR: 3–8 g/m²/day
Tensile strength: 120–200 MPa
Stiffness modulus: 1500–2500 MPa
Haze: < 5% for clear variants
Inner Layer: PE (Polyethylene)
Thickness: 50–90 μm
Functions and properties similar to PET/PE structure
Often uses higher density PE for improved seal integrity
| Parameter | PET/PE Structure | BOPP/PE Structure |
|---|---|---|
| Total Thickness | 65–125 μm | 70–125 μm |
| Seal Strength | 10–18 N/15mm | 9–15 N/15mm |
| Moisture Barrier (WVTR) | 5–15 g/m²/day | 3–8 g/m²/day |
| Oxygen Barrier (OTR) | 50–200 cm³/m²/day | 100–300 cm³/m²/day |
| Puncture Resistance | Good | Very Good |
| Operating Temperature | –40°C to 80°C | –40°C to 70°C |
| Minimum Seal Temperature | 115–135°C | 110–130°C |
| Print Quality | Excellent (8–10 colors) | Very Good (6–8 colors) |
| Cold Crack Point | < –50°C | < –45°C |
Fish Fillets: Salmon, cod, tilapia, haddock
Shellfish: Shrimp, prawns, scallops, crab meat
Whole Fish: Smaller varieties, cleaned and gutted
Fish Portions: Battered, breaded, or plain portions
Seafood Mixes: Combined seafood products
Vegetables: Peas, corn, mixed vegetables, spinach
Fruits: Berries, mango chunks, tropical fruit mixes
Prepared Foods: Individual meal components
Meat Products: Ground meat, smaller cuts (with appropriate labeling)
Bakery Items: Dough, pastries, pre-formed items
Retail consumer packs (200g–1kg)
Foodservice bulk packs (2–5kg)
Portion-controlled packaging
Value packs and family-sized pouches
Moisture Barrier Excellence: Particularly strong with BOPP/PE structure
Freezer Burn Prevention: Adequate protection for standard 12–18 month shelf life
Ice Crystal Control: Minimizes surface dehydration and texture degradation
Physical Durability: Resists punctures from sharp bones or product edges
Leak Prevention: Reliable seals contain natural juices and melting ice
Cost-Effectiveness: Lower material costs than multi-layer barrier films
High-Speed Compatibility: Excellent runnability on VFFS equipment
Reduced Shipping Costs: 40–60% lighter weight than rigid packaging
Space Optimization: Flat pouches maximize freezer and transport capacity
Reduced Damage Rates: Lower incidence of package failure during handling
Product Visibility: Clear variants allow consumers to see product quality
Easy Storage: Flexible pouches conform to available freezer space
Convenient Portions: Various size options for different household needs
Brand Presentation: Excellent print quality for attractive shelf presence
Reduced Waste: Often includes resealable features for partial use
Material Efficiency: Less plastic usage than rigid alternatives
Transport Efficiency: Lower carbon footprint per product unit
Recycling Compatibility: PE components align with existing recycling streams
Food Waste Reduction: Adequate protection extends product usability
Puncture Resistance: Withstands sharp fish bones and shellfish edges
Abrasion Resistance: Maintains integrity during handling and stacking
Seal Integrity: Strong seals prevent leakage and contamination
Impact Resistance: Protects against dropping and rough handling
Dehydration Prevention: Maintains product moisture content and weight
Texture Preservation: Minimizes surface crystallization and texture changes
Juice Retention: Contains natural juices and fluids during thawing
Freezer Burn Barrier: Reduces oxidation and quality degradation
Low-Temperature Flexibility: Maintains performance at –40°C
Freeze-Thaw Stability: Withstands temperature cycling
Seal Reliability: Consistent sealing across temperature variations
Moderate Oxygen Barrier: May limit shelf life for highly sensitive products
Fat/Oil Resistance: May require special formulations for high-fat fish
Best For: Products with ≤18 month shelf life requirements
Limited Oxygen Barrier: Not suitable for products requiring oxygen exclusion
Temperature Sensitivity: Lower maximum temperature resistance than PET
Best For: Moisture-sensitive products with moderate shelf life needs
Easy-Open Designs: Laser scoring, tear notches, pull tabs
Resealable Options: Zipper closures for multiple-use packaging
Anti-Fog Treatments: Maintain clarity in retail freezer displays
Gas Flush Compatibility: For modified atmosphere packaging (limited)
Leak-Proof Designs: Enhanced seal areas for liquid containment
High-Definition Printing: Photo-quality graphics for premium presentation
Transparent Windows: Partial transparency for product viewing
UV-Resistant Inks: Maintain color stability under freezer lighting
Information Areas: Dedicated spaces for cooking instructions, nutrition facts
Cost-effective packaging for mainstream product lines
Reliable performance for standard distribution channels
Good machinability on existing packaging equipment
Versatile solution for various product types
Space-efficient packaging for freezer optimization
Clear product visibility enhances consumer confidence
Reduced in-store damage and leakage issues
Attractive presentation for impulse purchases
Durable packaging for bulk handling
Portion-controlled options reduce waste
Easy storage in commercial freezers
Clear labeling for inventory management
Food Safety: FDA 21 CFR, EU 10/2011 compliant
Migration Testing: Complies with global migration limits
Seal Integrity: Meets industry standards for frozen food packaging
Temperature Testing: Validated for performance across stated range
Print Safety: Food-grade inks and coatings
Higher print quality and gloss are priorities
Slightly better oxygen barrier is needed
Products require higher temperature resistance (e.g., for microwave reheating)
Brand presentation is a key differentiator
Maximum moisture barrier is critical
Lower material cost is essential
High clarity for product visibility is desired
Products have lower oxygen sensitivity
The Frozen Fish & Food Packaging Pouch in PET/PE and BOPP/PE structures offers a balanced, economical solution for mainstream frozen food packaging needs. While these two-layer constructions may not provide the ultra-high barriers of more complex multi-layer films, they deliver sufficient protection for standard shelf-life requirements at a significantly lower cost point.
These pouches are particularly suitable for products distributed through conventional retail channels with typical turnover rates, where the combination of adequate protection, cost efficiency, and consumer appeal creates optimal value. Their simplicity also offers advantages in production efficiency, environmental impact, and compatibility with existing packaging infrastructure.
Ideal For: Mainstream frozen fish processors, vegetable packers, fruit processors, and food manufacturers seeking reliable, cost-effective packaging for products with moderate shelf-life requirements and standard distribution through retail and foodservice channels.