| Customization: | Available |
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| Material: | PU |
| Free Rising Density: | 24.5-26.5kg/M3 |
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SDL3231 is a high-performance rigid polyurethane (PU) foam using (CP) blowing agent, designed for continuous production of color steel sandwich panels in cold storage, roofing, and industrial walls. With exceptional thermal insulation (low conductivity), strong steel adhesion, and dimensional stability, it delivers long-lasting performance in extreme temperatures (-50°C to 70°C).
Key Benefits:
Eco-Friendly (Low ODP) - CP blowing agent reduces environmental impact.
Superior Thermal Insulation - Minimizes energy loss in buildings.
High Compressive Strength (≥160 KPa) - Durable for structural applications.
Fast Curing (6-10s cream time) - Boosts production efficiency.
Excellent Dimensional Stability - Resists warping in harsh conditions.
| Property | SDL3231 (Blend Polyol) | PM400 (Recommended MDI) | Foam Performance |
|---|---|---|---|
| Appearance | Light yellow liquid | Brown liquid | Rigid, closed-cell foam |
| Density (25°C) | 1.10±0.10 g/cm³ | 1.22-1.25 g/cm³ | Free rise density: 24.5-26.5 kg/m³ |
| Viscosity (25°C) | 300-500 cps | 350-500 cps | Smooth continuous processing |
| Cream Time | 6-10 s | - | Ultra-fast reaction |
| Gel Time | 40-50 s | - | Balanced curing speed |
| Compressive Strength | - | - | ≥160 KPa (parallel) |
| Dimensional Stability | - | - | ≤0.55% (-30°C), ≤0.99% (100°C) |
Eco-Friendly CP Blowing Agent - Lower ODP than traditional foams.
Faster Production - 6-10s cream time vs. competitors' 10-15s.
Wider Temp Range (-50°C to 70°C) - Outperforms in extreme climates.
Stronger Bonding - Superior adhesion to steel surfaces.
Cold Storage Panels
Industrial Roofing/Walls
Prefab Building Modules
HVAC Insulation
Fire-Rated Door Cores
| Parameter | Recommended Value |
|---|---|
| Mixing Ratio (SDL3231:PM400) | 1:1.3 (volume ratio) |
| Material Temperature | 23±3°C |
| Machine Pressure | ≥120 bar |
| Belt Temperature | 40-50°C |
Critical Notes:
Calibrate foaming machine flow (≤1 g/s fluctuation).
Maintain MDI temperature at 18-28°C for optimal reactivity.
Store in sealed drums (15-25°C) to prevent moisture absorption.
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