1. The thermal conductivity of hard polyurethane is low, and the thermal performance is good. When the density of rigid polyurethane is 35 to 40kg/m3, the thermal conductivity is only 0.018~0.024w/ (m.k), which is about half of that of EPS. At present, the thermal conductivity of all thermal insulation materials is the lowest.
2. The hard polyurethane has moisture proof and waterproof properties. The obturator rate of hard polyurethane is more than 90%. It is a hydrophobic material. It will not increase the thermal conductivity by absorbing moisture, and the wall will not permeate water.
3, hard polyurethane fireproof, flame retardant, high temperature resistance. Polyurethane in flame retardant agent, a nonflammable, self extinguishing materials, softening point it can reach 250 degrees Celsius, only at higher temperature occurs when decomposition: in addition, polyurethane will form carbon on the foam surface in combustion, the carbon layer can isolate the foam. It can effectively prevent the spread of the flame. Moreover, the polyurethane does not produce harmful gas at high temperature.
4, as the polyurethane board has excellent thermal insulation performance, it can reduce the thickness of the enclosure structure and increase the indoor area under the same insulation requirements.
5, the anti deformation ability is strong, it is not easy to crack, and the face is stable and safe.
6. The porosity structure of polyurethane is stable. It is basically closed structure. It is not only good in thermal insulation, but also in freezing thawing and sound absorption. The average life span of the thermal insulation structure of hard foam polyurethane can reach more than 30 years under the condition of normal use and maintenance. It can not be damaged under dry, wet or electrochemical corrosion, and due to external influences such as insects, fungi or algae growth, or rodent destruction.
7, the comprehensive price ratio is high. Although the unit price of rigid polyurethane foam is higher than that of other traditional insulation materials, the increased cost will be offset by a large reduction in heating and cooling costs.
From: Cold Storage Panel