5-Layer High-Performance Lamination PE Film

Detailed Roles of Lamination PE Film in Multilayer Packaging

In a 2-layer (PET/PE, OPP/PE, PA/PE) or 3-layer (PET/AL/PE, OPP/MPET/PE) laminated packaging structure, the PE film performs 4 main functions:

1. Direct Contact Protection (Food Safety & Contact Layer)

The 100% virgin LLDPE layer directly embraces the product, isolating it from external physical impacts and meeting the strictest FSSC 22000 standards, ensuring no chemical migration or odor alteration.

Hermetic heat-seal seam under B2B standardsASTM F88

2. Mechanical Support & Puncture/Tear Resistance (Impact & Puncture)

While the outer printing film (PET/BOPP) provides flat rigidity and image display, the inner PE lining film assumes all the load-bearing capacity, puncture resistance from sharp food edges (fish fins, bones, seeds), and brittleness resistance in deep-freeze environments (-25°C).

Dart drop impact & puncture resistance testingASTM D1709

3. Instant Sealing in High-Speed Packaging & Contamination Resistance (Hot Tack & Contamination)

On high-speed automated packaging lines (VFFS/HFFS), products are continuously discharged into the bag immediately after sealing. NOVAPLEX® PE film possesses superior hot seal strength (Hot Tack), helping the seal to bear loads even while molten. At the same time, the film has the ability to seal through spice dust or fat/grease adhering to the bag edges.

4. Food Safety Security & Lamination Adhesion (Food Safety & Lamination)

Manufactured from 100% selected virgin plastic in a standardized factory environment, the laminated PE film contacts food directly without causing degradation or strange odors. The outer surface is treated with stable Corona, providing absolute adhesion with lamination glue (both Solvent-free and Solvent-based), completely avoiding delamination throughout its shelf life.

5-Layer Co-extrusion Technology & Functional Distribution Structure (100% Virgin Resin)

Unlike traditional 3-layer extrusion technology, DNC Film's new generation 5-Layer Co-Extrusion line allows separating the film structure into 5 independent material layers (A/B/C/D/E). This enables R&D engineers to design specialized formulas for each layer position without having to compromise between opposing technical properties. Especially, the NOVAPLEX® laminated PE film line commits to using 100% premium virgin resin, absolutely not introducing recycled plastic or impurities into any layer. The 5-layer functional structure is distributed as follows:

• Layer A (Outer Lamination Layer): Uses virgin resin with high compatibility with lamination glue and superior surface gloss. Treated with stable surface energy Corona (38–42 Dynes/cm) to tightly bind the lamination glue, completely eliminating the risk of delamination during storage or heating.
• Layer B & Layer D (Structural & Stress Balancing Layers - Sub-skin Layers): Applies high-tech Polyethylene resins with a large flexural modulus and high tensile strength. These two symmetrical layers act as a load-bearing frame, creating stiffness to keep the film absolutely flat, without wrinkling or curling when passing through the lamination heating roller.
• Layer C (Central Core Layer): Concentrates tough virgin resins to enhance puncture resistance, reinforce Water Vapor Transmission Rate (WVTR) barrier properties, and create overall mechanical strength for the packaging.
• Layer E (Inner Sealant Layer): Integrates premium low-temperature heat-sealing resins, lowering the Seal Initiation Temperature (Low SIT) and creating strong hot seal strength (Hot Tack). Layer E helps the seal weld instantly, flexibly, and completely seal through food dust or fat/grease.