Cold storage boards are mainly classified according to the core material (core filler) and the protective surface material.

Classified by insulation core material.

This is the core classification of the cold storage board, which directly determines its insulation performance, strength and price:

Polyurethane core board: It is currently the most mainstream and high-performing material. Its thermal conductivity is extremely low (approximately 0.018 – 0.027 W/(m·K)), providing excellent insulation, moisture-proofing, and high strength. Although the price is slightly higher, its overall cost-effectiveness is the best, and it is widely used in medium and low-temperature cold storage facilities.

Polystyrene sandwich panels: include EPS (ordinary foam) and XPS (extruded polystyrene). Their advantages are low cost and suitability for high-temperature storage areas. However, their disadvantages are low strength and high water absorption. The insulation effect will deteriorate due to moisture, and they are generally used in situations with low requirements.

Other special materials: For instance, graphene polystyrene board (GP1). It possesses excellent properties such as high compressive strength and non-water absorption, and is a relatively new environmentally friendly material. Vacuum insulated panel (VIP) has an extremely low thermal conductivity, but is expensive and is used in special occasions with extreme requirements in space.

Classified by the protective surface material.

It directly affects the appearance, durability and cleanliness of the storage board:

• Color-coated steel sheet: This is the most common surface material. It has high cost-effectiveness and good strength, and is suitable for ordinary storage.
• Stainless steel sheet: They are mostly used in food processing or pharmaceutical cold storage facilities. They are corrosion-resistant and easy to clean, meeting hygiene standards.
• Embossed aluminum sheet: It has good heat conductivity and is often used in environments requiring good heat transfer or specific strength.
• Galvanized sheet / salted steel sheet: They are mainly used for floor plates or in areas with special requirements for corrosion resistance.

Classified by thickness and application.

Apart from the material, thickness is also an important criterion for classification, directly corresponding to the applicable storage temperature:

• 60mm thick: Generally suitable for insulation conditions above 0°C, such as high-temperature storage rooms and fresh-keeping storage rooms.
• 100mm thick: Suitable for insulation conditions ranging from 0°C to -25°C, widely used in medium-temperature cold storage rooms and refrigeration storage rooms.
• 120mm/150mm thick: Suitable for low-temperature storage rooms and freezing storage rooms with temperatures ranging from -20°C to -45°C.
• 200mm thick: Can be used for refrigeration storage rooms with even lower temperatures (such as below -38°C) or special industrial cold storage rooms.

 

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