In the building insulation sector, traditional materials have long struggled with the “performance triangle dilemma”: balancing high thermal insulation efficiency, fire safety, and construction feasibility. These three factors rarely coexist, limiting energy efficiency improvements and, in extreme cases, posing serious safety hazards.
Organic Materials: A Trade-off Between Insulation and Fire Risk
Organic insulation materials such as expanded polystyrene (EPS) and extruded polystyrene (XPS) have dominated the market for years due to their low thermal conductivity of 0.028–0.041 W/(m·K). However, they fall short on fire resistance. Most are rated B2 (combustible) and release toxic gases such as hydrogen cyanide (HCN) and carbon monoxide (CO) during combustion.
Structural issues further worsen the problem:
- EPS boards lack strength, requiring extra reinforcement for tile adhesion.
- XPS boards suffer from poor dimensional stability and weak bonding with mortar, leading to detachment or cracking of the insulation system.
In short, high insulation efficiency often comes at the cost of safety and durability.
Inorganic Materials: Fire-Safe but Vulnerable to Moisture and Heavy Construction Loads
Inorganic materials such as rock wool offer A-grade non-combustibility, addressing the flammability issue, but bring their own set of challenges:
- High density (120–150 kg/m³) makes installation labor-intensive and requires lifting equipment.
- Low strength and fragility increase handling difficulty and require extra worker protection.
- High water absorption: When moisture uptake exceeds 5%, thermal conductivity can rise by 40%, drastically reducing insulation performance over time.
Other inorganic options fare no better. For example, foamed cement boards have a thermal conductivity of 0.065–0.070 W/(m·K), which fails to meet stringent energy-saving standards.
The Core of the Dilemma
- Organic materials rely on “low thermal conductivity – high toxicity” trade-offs.
- Inorganic materials fall into a “high fire resistance – rapid performance decay” cycle. Neither can achieve the triple requirement of high insulation efficiency, fire safety, and construction practicality.
Breaking this deadlock requires innovation in both material science and processing technology.
Feilong’s Low-Pressure Foaming Solution: Redefining Building Insulation Performance
Feilong’s polyurethane foaming technology combines advanced formulations with precision-controlled processing, achieving a breakthrough in high insulation efficiency, fire safety, and environmental compliance. The core lies in its cyclopentane foaming system, which produces a high-density closed-cell structure (≥95%), delivering superior thermal and mechanical performance.
Why Feilong’s Low-Pressure Foaming Machine Stands Out
In insulation engineering, a 1% error in material ratio can cut insulation performance by 20%, and a 5°C temperature variation can cause uneven mixing. Feilong’s equipment tackles these issues with three key innovations:
1. Servo-Driven Metering Pump: Precision Ratio Control (±0.5%)
Manual mixing often results in ±5% ratio deviation, causing inconsistent foam density and poor thermal stability. Feilong’s servo-controlled metering pump and PLC system maintain a perfect 1:1 ratio with ±0.5% accuracy.
- Result: Foam density variation reduced to ≤3 kg/m³ vs. ±15 kg/m³ in manual mixing, ensuring thermal conductivity stays in the 0.028–0.030 W/(m·K) optimal range.
2. Intelligent Temperature Control: Stable Operation Even at -5°C
When raw material temperature drops by 10°C, viscosity triples, making mixing difficult. Feilong’s dual-layer heated tanks (304 stainless steel) with integrated intelligent temperature control keep raw materials at 25°C ±2°C, even in sub-zero conditions.
- Outcome: Consistent viscosity for polyol and isocyanate (ideal mixing state at 22°C), eliminating “clumping” and dead zones.
3. High-Shear Mixing Head: 98% Homogeneity
Uneven mixing causes cracks and thermal performance failure. Feilong uses a multi-tooth high-shear mixing head spinning at 2,800–5,000 rpm, achieving molecular-level blending.
- Performance: Foam cell uniformity up to 98%, closed-cell rate >92%, and compressive strength improved by 15% compared to traditional methods.
From metering to heating to mixing, Feilong delivers full-process precision, ensuring insulation layers with stable, long-lasting performance. The system is backed by ISO9001 certification, over 30 patents, and a PLC touchscreen interface, making operation as intuitive as a smartphone.
Summary: Three Dimensions of Value – Technology, Economy, Sustainability
Feilong Polyurethane Low-Pressure Foaming Machine addresses four key industry pain points:
✔ Flammability & Energy Loss → B1-grade fire resistance + thermal conductivity as low as 0.020 W/(m·K)
✔ Low Efficiency → PLC automation and one-step spray process reduce construction cycles
✔ Environmental Compliance → Low VOC emissions, eco-friendly blowing agent
✔ High Costs → Material waste cut by 30%+
Its potential in building retrofits and cold-chain insulation aligns with the 2025 building energy standard (75% energy-saving rate), positioning Feilong as a key driver of green construction transformation.
