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Polyurethane high‑flame‑retardant B1‑grade product

Category:

Polyether blend

◣ Technical Specifications

Physical indicators
Serial number	Project	Standard value	Measured value	Based on
1	Density	≥40kg/m³	47.8	GB/T 6343-2009 Standard
2	Compressive strength	≥150Kpa	263	GB/T 8813-2008 Standard
3	Thermal conductivity	≤0.024 W/m·K	0.02186	GB/T 10294-2008 Standard
4	Dimensional stability	Stability ≤ -1.5% (-25°C × 48 h)	0.230.260.09	GB/T 8811-2008 Standard
5	Water absorption rate	R≤4%	1.8	GB/T 8810-2005 Standard

Flame-retardant index
Serial number	Project	Standard value	Measured value	Based on
1	Oxygen Index	≥30%	36	GB/T 2406.2-2009 Standard
2	Burn Rate Growth Index	FIGRA0.4MJ≤250W/s	170	GB/T 8624-2012 standard, GB/T 20284 standard
3	The flames spread.	The lateral flame spread did not reach the edge of the specimen’s long wing.	Compliant with
4	Release heat	The total heat release of 600s, THR600s, is ≤15 MJ.	11
5	Flame tip height	Within 60 seconds, the height of the inner flame tip, Fs, is ≤150 mm.	Compliant with	GB/T 8624-2012 Standard GB/T 8626 standard, ignition time 30 s
6	Droplets	No burning droplets or debris ignited the filter paper at the scene within 60 seconds.	Compliant with

◣ Product Advantages

● Low thermal conductivity, an oxygen index exceeding national standards, and excellent flame-retardant performance, meeting the national fire safety standard of Grade B1.

● By adopting a structural flame-retardant approach, the goal is to achieve low heat release during combustion.

● It self-extinguishes upon removal from the flame and forms a dense carbon layer on the surface, effectively inhibiting flame spread.

● The foam exhibits excellent dimensional stability, high safety, and superior thermal insulation, ensuring stable storage temperatures and reducing energy consumption.

● Consistent foam yield helps customers cut raw material costs.

◣ Scope of Application
It is widely used in civil‑engineering cold storage facilities, steel‑structure cold storage, ultra‑low‑temperature cold storage, refrigerated cold storage, low‑temperature cold storage, and building exterior walls, among other applications.

Keywords:

Category:

Polyether blend

Polyurethane product system for casting

New-type polyurethane product with high compressive strength