High Index Polyisocyanurate (PIR) Bun Stock
NanoPor® CryoMax PIR is a high-performance rigid polyisocyanurate foam designed for extreme thermal environments. With an isocyanate index of 350, it forms a dense, crosslinked aromatic matrix offering superior dimensional stability, closed-cell structure, and fire resistance. The foam is cast in bun stock form and easily machinable into sheets, rings, or custom profiles for LNG and cryogenic applications.
| Property |
Value / Range |
Test Method / Notes |
| Density |
45–55 kg/m³ |
ASTM D1622 |
| Thermal Conductivity @ –170°C |
≤ 0.014 W/m•K |
ASTM C177 |
| Closed Cell Content |
≥ 95% |
ASTM D6226 |
| Compressive Strength |
≥ 350 kPa |
ASTM D1621 |
| Dimensional Stability |
≤ 1% (7 days @ 70°C) |
ASTM D2126 |
| Cryogenic Stability |
No cracking/shrinkage @ –170°C |
Internal QC Protocol |
| Fire Rating |
Class 1A |
IS 12778 / ASTM E84 |
| Water Absorption |
≤ 1.5% by volume |
ASTM D2842 |
| Adhesion to Metal |
Excellent (Steel, SS, Cu) |
ASTM D903 |
| Color |
Pale yellow / beige |
Visual |
| Machinability |
High – CNC, lathe, manual |
Fabrication grade |
Packaging & Availability
- Form: Cast Bun stock blocks (2.6 m × 1.0 m × 0.57 m)
- MOQ: 50 blocks (custom sizes available)
- Lead Time: 10–14 days from order confirmation
- Export Compliance: RoHS, REACH, GWP < 5
