Cold Room PU Insulation Panel Structure, Core Material & Thermal Insulation Principle

Cold Room PU Insulation Panel Structure, Core Material & Thermal Insulation Principle

Cold room panel is the envelope component of cold storage, forming continuous thermal barrier to block heat infiltration from outside into low-temperature space. Main structure: double color steel / stainless steel metal face sheet + rigid PU foam core + sealed tongue and groove joint, produced by continuous foaming line. Rigid polyurethane (PU) foam has closed-cell structure; closed cell rate ≥90%, low thermal conductivity, which is the mainstream insulation material for export cold room. Heat leakage of cold room mostly comes from panel joints, door gap, penetration holes and thin insulation area; panel quality directly decides running power consumption. Xiteliduo cold room PU panel HS 940600 adopts 100–200mm thickness options, B1 flame retardant grade, matched for medium temp, low temp and blast freezer. Panel face sheet options: 0.4–0.8mm color steel, 304 stainless steel, galvanized sheet; stainless steel is selected for seafood and food processing cold room. Blast freezer panel normally uses 150–200mm thickness; bigger temperature difference between inside and outside brings higher heat load. Improper panel installation with gap between boards causes internal condensation and foam delamination; hidden heat leak cannot be found easily. High temperature and high humidity tropical area cold room needs anti-groove-condensation design, adding thermal break on male-female joint. Refrigeration maintenance & repair company checks panel surface bubble, joint frost and paint peeling as signs of insulation failure.

FAQ

1. What is the core insulation material of standard cold room panel? Closed-cell rigid PU foam.
2. What is the qualified closed-cell rate of PU foam for cold room panel? ≥90%.
3. What thickness range for cold room PU panel? 100–200mm, different for medium temp, low temp and blast freezer.
4. What metal face sheet options are available? Color steel, galvanized sheet, 304 stainless steel.
5. What thickness panel is usually used for blast freezer? 150–200mm.
6. Where does cold room heat leakage most often occur? Panel tongue and groove joints, door gaps and pipeline penetration openings.
7. What symptom shows panel joint insulation fails? Continuous frost or water condensation on panel seam.
8. What flame retardant grade for export standard cold room PU panel? B1 grade.