I. Product Overview
Polyurethane sandwich panels for cold storage are made by combining inner and outer metal sheets (like color steel or stainless steel ones) as face panels with polyurethane rigid foam in the middle as the core. They have excellent thermal insulation, good strength, and are durable, helping maintain a stable low temperature in cold storages and cut energy consumption.
II. Specification Parameters
(I) Thickness
Common thicknesses range from 50mm to 200mm, such as 50mm, 100mm, 150mm. Small cold storages may use 50 - 100mm ones, while large or low-temperature ones often need 120mm or thicker for better insulation.
(II) Length
It can be customized. Usual lengths are 3m, 6m, 9m, with a maximum around 12m. Transportation and installation factors should be considered when choosing.
(III) Width
Mostly around 1000mm, though some offer 900 - 1200mm widths to fit different layouts.
(IV) Face Panel Material and Thickness
- Face Panel Material:
- Color Steel Sheet: Colorful, moderately priced, with decent corrosion resistance and strength, used in common cold storages.
- Stainless Steel Sheet: Highly corrosion-resistant, suitable for hygienic and corrosive environments like food and pharmaceutical cold storages, but costlier.
- Face Panel Thickness: Generally 0.3 - 0.8mm. Thinner ones for small, temporary storages; 0.5 - 0.8mm for large, long-term ones.
(V) Density of Polyurethane Core Material
It usually ranges from 30kg/m³ to 60kg/m³. Lower density ones are for less strict insulation needs, while 50 - 60kg/m³ ones are better for strict temperature-controlled storages.
(VI) Flame Retardant Performance
There are grades like B1 (hard to burn) and B2 (flammable). B1 panels are safer in fire prevention, fit for places with high safety demands like large logistics cold storages.
III. Installation Method
They're usually installed via tongue-and-groove or slot connections. Ensure tight connections and good sealing to avoid cold bridges affecting insulation.
IV. Scope of Application
Widely used in food (fruits, meats), pharmaceutical, chemical cold storages and scientific research low-temperature labs.
In short, these panels have diverse specs. When choosing, consider the cold storage's use, size, budget, insulation and fire prevention requirements to pick the most suitable ones.