As the core equipment for plastic film production, technological advances in film blowing machines directly impact the development quality of the packaging materials industry. According to statistics from the China Plastics Machinery Industry Association, domestic film blowing machine production reached 32,000 units in 2023, with multi-layer co-extrusion film blowing machines accounting for 42%, demonstrating a clear trend toward technological structural upgrading.
Core Technical Parameter Specifications
According to the industry standard "Plastic Machinery - Film Blowing Machines" (JB/T 9053-2017), key technical indicators for film blowing machines should meet:
| Technical Parameters | Standard Requirements | Process Control Significance |
| Screw L/D Ratio | L/D=24:1-30:1 | Plasticization uniformity control |
| Heating Temperature Accuracy | ±2℃ (PID control system) | Material thermal stability assurance |
Haul-off Speed Range | 3-150m/min (frequency control) | Film thickness uniformity |
| Blow-up Ratio Control | 1.5:1-4:1 (air pressure regulation) | Film transverse property optimization |
Process Technology Breakthrough Progress
Modern film blowing machine manufacturing has achieved three major technological innovations:
1.Multi-layer Co-extrusion Technology
Seven-layer co-extrusion systems achieve composite of different functional layers, with barrier properties improved by 80% compared to single-layer films (tested according to ASTM D3985 standard)
2.Automatic Thickness Control System
Laser thickness gauge accuracy reaches ±0.5μm, closed-loop control maintains film thickness deviation within ±3%
3.Energy-saving Optimization
Variable frequency speed control systems combined with servo motors reduce energy consumption by 25% compared to traditional equipment (calculated according to JB/T 53167 standard)
Product Quality Testing Data
National Plastics Products Quality Supervision and Inspection Center test report (No.: NPQSIC-2023-1205) shows:
| Test Items | Standard Requirements | Compliance Status |
| Film Tensile Strength | ≥20MPa (longitudinal) | Average 24.6MPa |
| Elongation at Break | ≥400% (transverse) | Average 456% |
| Heat Seal Strength | ≥15N/15mm | Average 18.2N/15mm |
| Haze Value | ≤3% (transparent film) | Average 1.8% |
Material Adaptability Analysis
Technical parameters for different raw materials in film blowing processes (Plastics Engineering Society 2023 Technical Manual):
[LDPE Film] -->|Processing Temperature| [160-180℃]
[HDPE Film] -->|Processing Temperature| [180-200℃]
[LLDPE Film] -->|Processing Temperature| [170-190℃]
[PA Film] -->|Processing Temperature| [240-260℃]
Melt Flow Index (MFI) for various materials is controlled within 0.5-8g/10min range to ensure processing stability.
Environmental Technology Requirements
"Plastics Industry Standard Conditions" (MIIT Announcement No. 35, 2022) sets environmental performance requirements for film blowing machines:
-Volatile Organic Compounds (VOCs) Emissions: ≤50mg/m³ (GB 31572-2015 standard)
-Noise Control: Production area ≤85dB(A) (GB 12348-2008 standard)
-Energy Efficiency Grade: Achieve Level 2 energy efficiency or above (GB 24850-2023 standard)
Intelligent Development Level
Industrial digitalization upgrade status (China Machinery Industry Federation survey data):
1.Automation Level: 65% automation rate for large enterprises (annual output value >100 million yuan)
2.Data Collection System: Real-time monitoring of 20+ parameters, data storage period ≥3 months
3.Remote Diagnosis Function: Fault warning accuracy improved to 85%
Technical Development Bottlenecks
Main technical challenges currently faced:
1.Ultra-thin Film Production Stability: Film breakage rate still reaches 8%-12% when thickness <10μm
2.Multi-material Co-extrusion Compatibility: Difficulty controlling interlayer peel strength between different melting point materials
3.High-speed Production Quality Assurance: Thickness uniformity decreases by 15% when line speed >300m/min
Technology Development Trends
Key directions for industry technology development:
-Microlayer Technology Application: Layer count can exceed 32 layers, with single layer thickness controlled at nanometer level
-Online Detection Technology: Integrated infrared spectrometers for online material composition analysis
-AI Optimization Control: Machine learning algorithms optimize process parameters, reducing defect rates by 30%
-Green Manufacturing Processes: Bio-based material adaptability improvements, processing temperature reduced by 20℃
According to the "Plastics Processing Industry '14th Five-Year Plan' Development Guidelines," the high-end film blowing machine market is projected to reach 18 billion yuan by 2025. Under the guidance of "dual carbon" goals, energy conservation and environmental protection, intelligent manufacturing, and material innovation will become the three major driving forces for film blowing machine technology upgrades. Technological development needs to achieve coordinated unity of improved product performance while reducing energy consumption, environmental friendliness, and production efficiency.
