... .004 W/m.k Highest Working Temperature:-50~70 heat insulation material 1,TMaterial:Glass fiber2,Apparent Density:240-314k/ ... of ordinary insulated freezer materials, polyurethane foam is 20 times, residential glass wool insulation material was used 37 times. Compared ... , small size, light weight, etc., suitable for high energy efficiency, thermal insulation materials, space is small, the weight should ...