Eco Compliance of 3-Layer Co-extrusion Blown Film Machine

Compliance of 3-Layer Co-Extrusion Blown Film Machines with Eco Production Standards

Driven by global dual-carbon goals and stricter plastic packaging regulations, three-layer co-extrusion blown film machines manufacture high-performance composite films including food packaging, weather-resistant agricultural and high-barrier films. Full-chain management covering raw materials, equipment, processes and emissions is required to build a systematic environmental compliance system.

1. Eco-Compliant Raw Material Selection

Films consist of inner, functional and barrier layers complying with respective standards:

Food-contact inner layers adopt food-grade LLDPE/PP free of phthalate plasticizers per GB 4806.7.

Barrier layers use EVOH or biodegradable PBAT/PLA blends to replace fluorine-containing additives, in line with single-use plastic control policies.

Qualified recycled plastics meeting safety limits for heavy metals and VOCs are applicable for middle layers.

2. Low-Carbon Equipment Retrofit

Equipment energy loss, leakage and stability dominate environmental performance:

Permanent magnet synchronous motors cut power consumption by 15%–20%, complying with GB/T 38495 energy-saving criteria.

Optimized screws and die runners lower processing temperature by 5%–8% to reduce toxic fumes from resin thermal degradation.

Sealed hoppers and negative-pressure exhaust hoods prevent material escape and gas leakage.

Online thickness control (±0.5μm precision) curtails material waste by over 10%.

3. Optimized Green Processes

Intelligent air ring temperature & airflow control stabilizes bubbles and film integrity.

In-line edge trim recycling reuses 10%–15% waste trims for middle layers, raising material utilization to 95% and solid waste output.

Low-residue food-grade slip and anti-block additives meet GB 15063 hazardous substance limits.

Waste heat recovery from dies and motors preheats raw materials, boosting comprehensive energy efficiency by 25% and carbon reduction.

4. Closed-Loop Emission & Solid Waste Treatment

VOC fumes are captured and treated via activated carbon adsorption plus catalytic combustion to satisfy GB 16297 emission limits.

Defective films and plastic waste are stored separately and recycled by licensed processors instead of random disposal.

Production logs tracking raw material consumption, energy use and emissions support ISO 14001 environmental management certification and regular official inspections.

Conclusion

Meeting eco standards is an all-round systematic project covering materials, hardware, techniques and pollution control. It satisfies domestic environmental codes and global sustainable trends, advancing the green transition of plastic packaging industry.