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Blown film extrusion is a widely used manufacturing process for producing plastic films, commonly found in food packaging, agricultural mulch, industrial protection, and medical materials. At Zhuxin, a leader in high-end packaging equipment manufacturing, we specialize in advanced blown film technology that ensures precision, energy efficiency, and superior film quality. But how exactly does this process work? Let’s break it down.

The Blown Film Extrusion Process

Melting & Extrusion
Plastic resin pellets are fed into an extruder, where a rotating self-developed high-precision screw heats and melts the material into a viscous liquid.
The molten plastic is then forced through a circular die, forming a continuous tube of film.

Inflation & Cooling
Compressed air is blown into the tube, expanding it into a bubble (like a balloon) to the desired thickness and width.
The film is cooled by air rings, solidifying it while maintaining uniform thickness.

Flattening & Winding
The bubble is collapsed into a double-layered flat film by nip rollers.
A German-standard precision transmission system ensures smooth haul-off and rewinding, minimizing film breakage and ensuring flatness within ±2% tolerance.

Quality Control & Finishing
Advanced sensors monitor thickness, tension, and temperature, with a ±0.5°C German temperature control module ensuring stable melt flow.
The finished film is wound into rolls for further processing or packaging.

Why Choose Zhuxin’s Blown Film Machines?

With 36 years of expertise in blown film technology, Zhuxin delivers high-performance, energy-efficient, and intelligent solutions for global manufacturers. Here’s what sets us apart:

Precision Engineering for Superior Film Quality
Self-developed high-precision screw – Eliminates crystal points and thickness fluctuations, ensuring consistent tensile strength and light transmission.

German temperature control system – Prevents heat sealing defects and brittleness, meeting FDA, CE, and medical-grade standards.

German imported gearbox – Maintains synchronization between haul-off and rewinding, reducing film breakage and waste.

Energy Efficiency & Cost Savings
Our machines achieve up to 80% energy savings compared to conventional models.

Faster ROI (12-18 months payback period) due to reduced material waste and higher production efficiency.

Smart & Customizable Solutions
Fully automated controls for real-time adjustments, minimizing human error.

Custom configurations for biodegradable films, multi-layer co-extrusion, and high-barrier packaging.

Global Trust & Reliability
2,000+ successful installations worldwide across food, medical, and industrial sectors.

Over 50 international certifications (ISO 9001, CE, FDA) ensuring compliance with strict industry standards.

90%+ core components self-developed for unmatched durability and performance.

Conclusion

Blown film extrusion is a complex yet highly efficient process that demands precision engineering and intelligent control—qualities that define Zhuxin’s machinery. Whether you need ultra-thin food-grade films, durable agricultural mulch, or medical-grade packaging, our energy-saving, high-speed, and customizable blown film machines deliver unmatched quality and reliability.

Partner with Zhuxin—where innovation meets sustainability in film production. Explore our solutions today and elevate your manufacturing efficiency!