... -1997 and flame retardant Grade B1.Adapt to the larger temperature differenceHongbo PC Transparent Corrugaed Sheet occurs no cold crisp in ... to be Grade I, no fire drops nor toxic gas.Temperature propertyIn the temperature from -40°C~+120°C, the product will not ... other materials have the disadvantages of short life span, bad temperature and moisture insulation, high cost of frame, easy to be ...