Co-Extrusion Blown Film Machine (5-11 Layers PE/PP Films)
Multi-layer blown film extrusion line for manufacturing food packaging films with enhanced barrier properties
The 5-11 layer co-extrusion blown film machine is engineered for high-end food and pharmaceutical packaging film production. Through advanced multi-layer co-extrusion technology, the line enables films with enhanced moisture retention, aroma preservation, freshness protection, light shielding, and penetration resistance, effectively extending product shelf life and meeting stringent packaging requirements.
Compared with conventional low-layer blown film systems, 5-11 layer configurations provide significantly reinforced barrier performance against oxygen, water vapor, and light. This technology is widely adopted in high-standard markets such as the Middle East, Europe, and North America, and is increasingly applied in domestic food and pharmaceutical packaging sectors. The production line features optimized system design, full automation, and a high cost-performance ratio, delivering an efficient and reliable solution for premium packaging film manufacturing.
Product parameters
| Item | Specification |
| Number of film layers | 5-11 layers (customizable) |
| Film width | Adjustable according to die specifications (compatible with mainstream packaging sizes) |
| Film thickness | 0.015-0.2mm (tolerance ±3%) |
| Oxygen transmission rate (OTR) | ≤5cc/(m²·24h·atm) (depending on material combination) |
| Water vapor transmission rate (WVTR) | ≤3g/(m²·24h) (depending on material combination) |
| Heat sealing strength | ≥30N/15mm |
| Puncture resistance | ≥80N |
| Winding speed | 3-45m/min |
Equipment parameters
| Item | Specification |
| Extrusion system | 7 single-screw extruders |
| Main motor type | Three-phase asynchronous motor |
| Heating method | Cast aluminum heaters |
| Cooling method (machine) | Air cooling |
| Main drive speed control | Frequency inverter control |
| Temperature control | Computer-controlled (real-time monitoring and regulation) |
| Main gearbox | Square hard-tooth surface gearbox |
| Co-extrusion die type | Seven-layer co-extrusion stacked spiral in-die composite die |
| Product cooling method | Vacuum sizing water cooling+air cooling |
| Air ring specification | Ø1200mm, 2 units |
| Haul-off roller specification | Ø160×400mm |
| Haul-off speed control | Frequency inverter control (independent speed control for primary and secondary haul-off) |
| Chevron roller unit | 4 sets (for secondary haul-off) |
| Winding method | Rotary back-to-back winding |
| Rotary motor power | 0.55kW |
| Winding speed | 3-45m/min |
| Total installed power | Approx. 330kW |
| Machine dimensions (L×W×H) | 9000×10600×6600mm |
| Control system | PLC+touch screen (supports recipe storage and recall) |
Material extrusion system
Seven single-screw extruders equipped with cast aluminum heaters and hardened gearboxes, combined with material hoppers and automatic feeding systems, ensure stable melting and material delivery.
Co-extrusion die head
Seven-layer in-die composite spiral die head with replaceable die lips and mandrels enables uniform layer distribution and consistent film structure.
Primary cooling and sizing system
Water cooling, air blowers, and primary haul-off units complete initial film stabilization.
Stretching and thermal setting system
Secondary haul-off with gusset board, combined with preheating, heating, air-ring cooling, and thermal setting tower, enables biaxial stretching through adjustable draw ratios and optimizes film performance.
Finished film winding system
A 0.55kW rotating back-to-back winding unit works with secondary haul-off at 3-45m/min, ensuring stable and uniform winding.
Electrical control system
Computer-based temperature control, PLC frequency conversion with independent haul-off control, and touchscreen interface enable fully automated operation across the entire process.
- High barrier performance
In-die co-extrusion with 7-11 layers significantly enhances resistance to oxygen, water vapor, and light, making the films suitable for food and pharmaceutical freshness preservation. - High precision control
Temperature control accuracy of ±1°C, independent haul-off speed regulation, and rotating winding ensure film thickness tolerance within ±3% and coil end flatness deviation ≤ 1mm. - Efficient and stable operation
Durable core components support operational efficiency above 90%, with mean time between failures (MTBF) exceeding 1000 hours. - Intelligent and user-friendly operation
The PLC system stores up to 100 production recipes, supports one-touch parameter adjustment, and enables product changeover within 30 minutes, reducing labor dependency and operational cost.