Choosing a blown film machine is a major investment for any packaging or film-manufacturing business. With significant differences among manufacturers in technology, efficiency, and after-sales service, understanding how to properly evaluate machine performance is critical.
The advanced manufacturing standards of Zhejiang Chaoxin Machinery Technology Co., Ltd. provide valuable reference points for making informed purchasing decisions.
The following key considerations will help you avoid costly mistakes when selecting a blown film machine.
Blown Film Machine
A blown film machine is the core equipment used to produce packaging films, agricultural films, biodegradable films, and industrial films. When evaluating a blown film machine, buyers should focus on stability, efficiency, precision, and long-term reliability.
As a leading blown film machine manufacturer, Chaoxin combines advanced engineering design, strict 6S management, and industry-first technologies to deliver high-quality, high-output blown film systems for modern production lines.
Chaoxin blown film machines feature industry-leading five-roller haul-off technology, a major innovation in the film industry. This system significantly improves film stability, reduces wrinkles, enhances cooling uniformity, and supports high-speed production.
In addition, Chaoxin holds multiple winding technology patents, enabling precise tension control and ensuring smooth, wrinkle-free film rolls.
In extrusion performance, Chaoxin uses self-developed 30:1 and 32:1 bimetallic high-speed screws, offering exceptional plasticizing efficiency. These screws are suitable for LDPE, HDPE, LLDPE, biodegradable, and compostable materials.
The extrusion system is paired with motors from GE, Siemens, and Brook, ensuring stable torque, low noise, and energy-efficient operation. Core electrical components are sourced from ABB, Omron, and Schneider, providing high-precision control and long service life.
Energy efficiency is another key advantage of Chaoxin machines. By optimizing heating zones, variable-frequency drives, and intelligent PID control systems, energy consumption and material waste are significantly reduced. This aligns with global sustainability trends while helping customers lower operating costs.
Furthermore, Chaoxin offers a 3-year warranty on core components, far exceeding typical industry standards and demonstrating strong confidence in product durability and manufacturing quality.
Blown Film Process Explained
The blown film process converts polymer raw materials into high-quality film through a series of precise thermal and mechanical steps. Chaoxin’s blown film systems are optimized at every stage to ensure excellent film transparency, thickness uniformity, and mechanical strength.
1. Extrusion and Plasticizing
Plastic pellets enter the hopper and are heated and melted uniformly by Chaoxin’s high-efficiency bimetallic screws. The optimized screw design reduces energy consumption and prevents thermal degradation, especially when processing biodegradable materials.
2. Die Head Flow Distribution
The molten material enters a high-precision die head. Chaoxin die heads feature:
✔ Flow-channel optimization using dedicated simulation software
✔ Forged alloy steel with multiple tempering and stress-relief treatments
✔ International-level precision (roundness tolerance ±0.01 mm)
These advantages ensure uniform film thickness, stable melt flow, and extended die-head service life.
3. Bubble Inflation and Cooling
Compressed air inflates the film bubble, determining film width and thickness. Optimized air-ring structures improve cooling efficiency, enhance film transparency, and enable higher production speeds.
4. Haul-Off and Flattening
Chaoxin’s proprietary five-roller haul-off system provides:
• More stable bubble control
• Lower thickness deviation
• Consistent and precise tension management
5. Winding
Chaoxin’s patented winding technology maintains optimal tension throughout the winding process, preventing roll deformation or misalignment—ideal for downstream printing and bag-making operations.
The entire process is supported by intelligent control systems with real-time monitoring and automatic adjustment, minimizing downtime and improving product consistency.
Accessories
A high-performance blown film line depends not only on the main machine but also on high-quality auxiliary equipment. Chaoxin provides a complete accessory system to ensure precision, stability, and automation.
Core Accessories Include:
• Air rings – improved cooling and bubble stability
• Air compressors – stable inflation pressure
• Automatic screen changers – impurity filtration without stopping production
• Corona treaters – enhanced surface tension for better printing
• Rotating die systems – improved thickness uniformity
• Automatic thickness measurement systems – real-time monitoring
• Gravimetric or volumetric dosing systems – accurate material mixing and reduced waste
Chaoxin Accessory Advantages:
✔ ABB, Omron, Schneider control systems
✔ Die head diameters from φ500–φ1000 mm
✔ Surface roughness Ra 0.025 for high-clarity films
✔ Support for 1, 2, 3, and 5-layer structures
✔ Die head configurations: center feed, side feed, flat-fold designs
These upgrades allow customers to adapt flexibly to diverse market demands.
Our Products
Chaoxin provides complete blown film and bag-making solutions for packaging, agriculture, industrial applications, and biodegradable materials.
Blown Film Machine Series:
• Single-layer blown film machines
• Single-screw double die-head blown film machines
• AB two-layer blown film machines
• ABA three-layer co-extrusion blown film machines
• ABA dual-unit blown film machines
• ABC three-layer co-extrusion blown film machines
• Multi-layer co-extrusion blown film machines (3/5/7/9/11 layers)
• Biodegradable / compostable blown film machines
Bag-Making Machine Series:
• Bottom-seal bag-making machines
• Roll bag-making machines
• Side-seal bag-making machines
Chaoxin production facilities are equipped with:
✔ Constant-temperature and humidity machining environments
✔ European five-axis machining centers
✔ High-frequency forged alloy steel components
✔ ISO9001, ISO14001, CE, and RoHS certifications
These strengths enable Chaoxin to deliver one-stop solutions for the plastic packaging industry, covering the entire production chain from film extrusion to finished bags.
Service
After-sales service is a critical standard when evaluating blown film machine manufacturers. Chaoxin follows principles of professionalism, transparency, and long-term partnership.
Chaoxin Service Highlights:
⭐ 3-year warranty on core components
⭐ Lifetime technical support (installation, training, commissioning, process optimization)
⭐ Comprehensive after-sales service policy with rapid response
⭐ ISO9001 quality control with strict pre-delivery testing
⭐ Customer-oriented business philosophy
Every machine undergoes full mechanical, electrical, and performance testing before shipment, reducing maintenance costs and ensuring stable operation.
Conclusion
Selecting the right blown film machine requires comprehensive evaluation of technology, stability, energy efficiency, and service support. With advanced engineering, patented systems, high-precision control, and an industry-leading warranty, Chaoxin delivers reliable, durable, and competitive blown film solutions to customers worldwide.
