Advanced Equipment Technology and Production Capacity
Feilong Polyurethane Equipment, a sub-center of the National Reaction Injection Molding Engineering Technology Research Center, has developed a series of high-pressure foaming machines featuring a working pressure of 15–20 MPa and a material flow rate of 3–5 kg/min. The system achieves dosing precision within ±0.5%, ensuring material ratio stability during production.
Equipped with a PLC intelligent control system, Feilong equipment enables real-time monitoring of material temperature (±2°C control accuracy), pressure curve, and mixing head speed (2800–5000 rpm). Combined with 90-meter heated insulation hoses, it meets the needs of large-scale continuous construction.
To meet the demands of building material manufacturing, Feilong offers adjustable output ranging from 0.1–500 kg/min, supporting production of rigid foam materials with a density of 30–60 kg/m³. Its mold-free pouring system, featuring patented floating mechanical seal technology, solves traditional issues of material buildup and cleaning difficulty in mixing heads, extending continuous production time to over 8 hours, while keeping equipment failure rate below 0.5% per 1,000 hours.
Performance Advantages of Rigid Polyurethane Foam
Thermal Insulation Performance
Rigid PU foam produced by Feilong equipment features a closed-cell content above 95% and a thermal conductivity as low as 0.022 W/(m·K) at 25°C—improving energy efficiency by over 30% compared to EPS materials. Dimensional stability is controlled within ≤1.5% under -20°C to +70°C operating temperatures (70°C × 48h), meeting ASTM C1029 long-term thermal resistance requirements.
Mechanical Strength
With accurate density control, rigid foam products exhibit compressive strength of 0.25–0.4 MPa at 10% deformation and tensile bond strength ≥0.15 MPa, suitable for roofing and external wall applications. The water absorption rate is ≤3% (GB/T 8810), and aluminum foil composites provide vapor permeability ≥1.5 m²·h·Pa/g, preventing condensation and structural moisture damage.
Fire Resistance
With hexabromocyclododecane flame retardants, Feilong rigid foam materials achieve an oxygen index ≥28% and comply with GB 8624 B1 (fire retardant) and EN 13501-1 Class B-s1,d0 ratings. In the ASTM E84 test, surface flame spread index is ≤25 with smoke density ≤450, meeting safety requirements for building insulation applications.
Construction Technology and Quality Control
High-Pressure Spray Application
Feilong high-pressure spray systems use a 1:1 volume mixing ratio for A/B components, generating supersonic turbulent mixing (>200 m/s) in the mixing head. Foam atomization is controlled to 50–80 μm, resulting in uniform cell structure. Ideal construction conditions include:
- Ambient temperature: 5–35°C
- Substrate moisture content: <15%
- Multi-layer application: 10–15 mm per layer, 2-hour curing between layers This achieves a seamless and continuous insulation layer for exterior wall systems.
Rigid Panel Production
Feilong’s continuous production line manufactures PU sandwich panels with 30–120 mm thickness using a double-belt laminator. Equipped with online density control (±1 kg/m³) and automatic cutting, panel dimensions maintain ±0.5 mm/m tolerance. Typical output reaches 15 m/min for 1.2 m width panels, with annual capacity up to 1.5 million m².
Application Recommendations
| Application | Recommended Density | Process Recommendation |
|---|---|---|
| Exterior Wall Insulation | 40–45 kg/m³ | High-pressure spray + primer + mesh reinforcement |
| Roof Waterproof & Insulation | ≥50 kg/m³ | PU rigid foam + 0.5 mm aluminum foil composite + 2% slope design |
| Cold Storage Insulation | 38 ± 2 kg/m³ | Closed-cell rate >96%, vapor barrier upgrade |
Conclusion
With industry-leading high-pressure foaming technology, PLC intelligent control, and mold-free pouring innovation, Feilong Polyurethane Equipment enables stable and efficient production of rigid polyurethane foam. This material offers excellent thermal insulation, mechanical durability, and fire safety, making it an ideal choice for modern energy-efficient buildings. As green construction and building renovation continue to grow, Feilong’s polyurethane technology will empower ultra-low energy buildings and retrofit projects, driving sustainable development in the global construction industry.
