High-Density Rigid PU Insulated Panels

Main features

Our company specializes in producing double-sided polyurethane (PU) composite cold storage panels. The panel materials for our composite cold storage panels include fiberglass, color steel, stainless steel, and aluminum. We use advanced composite materials as insulation to create the composite panel walls, which are lightweight, high-strength, have excellent thermal insulation, are corrosion-resistant, anti-aging, insect-proof, non-toxic, and mildew-resistant, demonstrating their superior performance even at ultra-low temperatures.

Cold storage panels can be further classified according to their core panel materials:

Polyurethane Cold Storage Panels:

1. These panels use lightweight polyurethane with good thermal insulation properties as the core material, with an outer layer of SII, PVC color steel, or stainless steel. This sandwich panel design reduces heat transfer caused by temperature differences between the inside and outside, maximizing the efficiency of the refrigeration and freezing system.

2. Thickness specifications: 60, 75, 100, 120, 150, 180 mm

3. Dimensions: Standard panel width is 960 mm, and height ranges from 2 meters to 10 meters. (Note: Customization is also available based on your specific requirements)

Polystyrene Cold Storage Panels:

Polystyrene foam sandwich panels are made of colored steel sheets as the surface layer and closed-cell flame-retardant polystyrene foam as the core material. They are manufactured by pressing the colored steel sheets together using an automated continuous forming machine and then bonding them with high strength.

Cold Storage Panel Specifications:

1. Thickness (mm): 50, 75, 100, 150, 200, 250

2. Length (mm): Due to continuous forming production, the panel length can be determined according to project needs, but generally should not exceed 12000 mm due to transportation limitations.

3. Width (mm): Spliced type 1200, Interlocking type 1200, 1150

4. Cold Storage Panel Weight (Surface layer is 0.6mm thick colored steel sheet)

Double-sided color steel plate	Cost-effective, surface anti-rust coating, easy to install	Regular fruit and vegetable cold storage, logistics cold storage, dry goods low-temperature storage
Double-sided 304 stainless steel	Acid and alkali resistant, strong impact resistance, meets food and pharmaceutical hygiene standards	Food processing workshop, pharmaceutical cold storage, seafood and high-humidity corrosive environments
Color steel + stainless steel / embossed aluminum plate	Balances cost with interior moisture-proof, scratch-resistant, and wear-resistant needs	Cold storage with frequent trolley operations inside or floors/walls that need collision and moisture protection

The standard foaming density of polyurethane core material in standard cold storage panels is generally 38–40 kg/m³, with a thermal conductivity as low as 0.018–0.024 W/(m·K) and a closed-cell rate of over 90%–95% (good waterproof and moisture-proof performance).

• 50mm / 75mm: Suitable for constant temperature workshops, cool warehouses, and high-temperature preservation warehouses at 0℃–15℃.

• 100mm: The most commonly used specification, suitable for fruit and vegetable and dairy product preservation warehouses at -5℃–5℃, or general freezers at around -18℃.

• 120mm / 150mm: Suitable for low-temperature freezers for meat and aquatic products at -18℃–-25℃.

• 200mm and above: Suitable for ultra-low temperature quick-freezing warehouses and quick-freezing tunnels at -30℃–-40℃.

• Assembly structure: Small and medium-sized prefabricated cold storage often use eccentric hook (lock hook type) tongue-and-groove designs, which are easy to lock on-site and can be disassembled and relocated;

Large cold storage or continuous production line panels mostly use tongue-in-groove or interlocking types, providing better seam airtightness.

• Fire retardant level: Commonly B2 grade (flame retardant) and B1 grade (self-extinguishing when away from fire, with higher fire retardant performance);

Large commercial or pharmaceutical cold storage usually requires B1 grade.

1. Super insulation, energy-saving: The extremely low thermal conductivity can effectively reduce cold loss, greatly lowering the operating energy consumption of cold storage compressors.

2. High structural strength, deformation-resistant: The composite structure of PU foam and metal panels has high shear and compressive strength, and can even be used as a load-bearing structure for small to medium cold storage units.

3. Fire-resistant: PU cold storage panels from leading manufacturers meet B1 or B2 fire standards (with flame retardants), self-extinguishing when away from fire, ensuring high safety.

4. Moisture-proof and waterproof: The closed-cell structure blocks water vapor penetration, so insulation performance won’t drop or panels mold due to water absorption.

5. Efficient installation: Factory-prefabricated panels allow quick on-site assembly, cutting the construction period by more than 50%.