High-Efficiency 3-Layer Cast Film Extrusion Machinery

Core Structural Efficiency: Advanced ABC Co-Extrusion Architecture

Engineered for industrial-scale high-performance packaging, our 3-layer co-extrusion technology establishes an optimal balance between resin economy and film durability. The specialized ABC layer distribution isolates specific mechanical functions across three distinct channels:

• Outer Layer (A): Formulated for high cling and surface adhesion to secure palletized loads without film migration.
• Core Layer (B): Utilizes specialized LLDPE, metallocene (mLLDPE), or up to 20% post-consumer/post-industrial recycled (PCR/PIR) resin, reducing raw material costs by 15–20% without compromising structural integrity.
• Inner Layer (C): Delivers ultimate puncture, tear, and tensile strength to withstand sharp-edged cargo corners.
• Compared to traditional 2-layer films, this strategic resin allocation increases puncture resistance by 30–50% at equivalent thickness, ensuring reliable containment for demanding export packaging.

Thermal Precision & Continuous Melt Homogeneity

To maintain tight thickness tolerances across high-speed production runs, the 3-layer line integrates three independent extrusion units operating within a precisely controlled thermal window of 180°C to 240°C:

• Optimized Screw Geometry: Features a 33:1 L/D ratio with specialized barrier mixing elements, eliminating un-melted gels and temperature fluctuations.
• Precision T-Die & Distributor Block: Ensures smooth layer bonding with a die-lip gap precision within ±0.01mm, minimizing gauge deviation across the effective film width.
• Rapid Thermal Stabilization: A large-diameter primary chill roll rapidly quenches the molten extrudate to maintain exceptional optical clarity and lock in amorphous film stretchability.

Closed-Loop Quality Control & 350% Pre-Stretch Performance

Operating efficiency is reinforced through integrated inline measurement and tension automation:

• Inline Gauge Control: Closed-loop X-ray or infrared scanning sensors continuously monitor film profile, transmitting real-time feedback to auto-adjust die bolts and extruder throughput.
• High-Ratio Traction Unit: Precision speed-synchronized stretching rollers impart a stable pre-stretch capability exceeding 350%, drastically reducing film consumption per wrapped pallet.
• Inline Trim Reclamation & Continuous Winding: Edge trims are directly re-fed into Extruder B via integrated recycling units, while the non-stop turret winder guarantees uniform, wrinkle-free roll profile under continuous operation.

Heavy-Duty Applications & Industrial Compliance

Designed to meet rigorous supply chain demands, the film produced by this system excels in:

• Industrial logistics consolidation and heavy-duty pallet wrap.
• Sharp-edge building materials, ceramic tiles, and machinery packaging.
• Moisture-barrier protection and long-haul export shipping.
• Manufactured under strict engineering standards with CE safety compliance, providing packaging converters with verifiable operational reliability and high ROI.

Quick Comparison: 2-Layer vs 3-Layer Stretch Film