How Many Types of Cold Storage Insulation Materials Are There?

Currently, cold storage insulation materials can be divided into two main categories: mainstream general-purpose types and special-scenario dedicated types, totaling 7 core types. Their respective characteristics and applicable scenarios are as follows:

 I. Mainstream General-Purpose Types (Used by Over 90% of Cold Storages)

 1. Polyurethane (PUR/PIR) Series (Industry First Choice)

- Forms: Available in two types: "on-site spray foam" and "prefabricated insulated panels"

- Core Performance: Thermal conductivity 0.022~0.024 W/(m·K) (excellent insulation performance), closed-cell rate ≥95%, strong moisture resistance, fire rating up to B1 (flame retardant)

- Advantages: Spray-applied type forms a seamless integral insulation layer, strong adhesion, temperature resistance covering the full range of -60℃ to 120℃, service life of 15~20 years

- Disadvantages: Higher raw material cost, strict requirements for spray application workmanship

- Applications: All types of cold storages (fresh-keeping/chilled/frozen/ultra-low temperature), pharmaceutical cold chain warehouses, large commercial cold storages; currently the mainstream choice for cold storage

 2. Polystyrene Series (High Cost-Performance Option)

 ① EPS (Expanded Polystyrene)

- Performance: Thermal conductivity 0.038~0.042 W/(m·K), lightweight

- Advantages: Lower cost, easy to cut and install

- Disadvantages: Poor fire resistance (max B2 rating), panel joints prone to cold air leakage, average insulation performance

- Applications: Small fresh-keeping storages at 0~5℃, temporary cold storages, budget-constrained projects

 ② XPS (Extruded Polystyrene)

- Performance: Thermal conductivity 0.028~0.030 W/(m·K), dense structure, high compressive strength

- Advantages: Good water resistance, strong compressive strength, better insulation performance than EPS

- Disadvantages: Still has joint cold bridge issues, average fire resistance

- Applications: Medium-temperature cold storages (0~-10℃), cold storage floor insulation, seafood cold rooms

 3. Rock Wool/Glass Wool (Fire-Resistant Dedicated Type)

- Performance: Thermal conductivity 0.035~0.045 W/(m·K), Class A non-combustible (absolutely fireproof)

- Advantages: Excellent fire resistance, high-temperature resistance, good durability

- Disadvantages: Extremely hygroscopic (requires strict vapor barrier), average insulation performance, dusty during installation

- Applications: Cold storages with special fire protection requirements, cold storages storing flammable/explosive materials or food additives, fire-resistant isolation zones in cold storages

 II. Special-Scenario Dedicated Types

 1. Vacuum Insulation Panel (VIP)

- Performance: Thermal conductivity 0.004~0.008 W/(m·K) (3 times better insulation than polyurethane)

- Advantages: Ultra-thin and highly insulating, minimal space occupation

- Disadvantages: Extremely high cost (500~800 RMB/㎡), cannot be punctured or damaged, requires custom sizing

- Applications: Ultra-low temperature cold storages below -60℃, pharmaceutical cold chain, micro cold storages with extremely limited space

 2. Phenolic Resin Board

- Performance: Thermal conductivity 0.020~0.025 W/(m·K), B1 fire rating, temperature resistance from -150℃ to 200℃

- Advantages: Combines fire resistance and insulation, resistant to high and low temperatures, good moisture resistance

- Disadvantages: High brittleness, prone to chipping, relatively high cost

- Applications: Special cold storages with alternating high and low temperatures, chemical cold storages

 3. Niche/Traditional Materials

- Rice Husk Insulation: Used in traditional agricultural cold storages, extremely low cost but requires annual replacement of fill material; now largely obsolete

- Bio-based Foam Materials (New in 2026): Eco-friendly biodegradable materials based on polylactic acid/bamboo fiber; currently used only in high-end pilot projects

 Selection Recommendations:

1. Prioritize polyurethane: If budget is sufficient and insulation energy efficiency requirements are high → choose polyurethane spray foam/insulated panels

2. Budget-limited, choose XPS: For small to medium medium-temperature storages, choose extruded polystyrene boards for better cost-effectiveness

3. High fire protection requirements: Use rock wool as a fire-resistant layer, while keeping polyurethane as the main insulation

4. Ultra-low temperature scenarios: For cold storages below -60℃, choose vacuum insulation panels (VIP)

Company Profile:

Senbin Holding provides services on how many types of cold storage insulation materials there are. Our main business includes: refrigeration and insulation equipment, quick-freezing/ice-making equipment, chillers/clean rooms, warehousing facilities and equipment, cold storage and cold chain, refrigeration components, and refrigeration compressor units. Company highlights: direct supply from the source, transparent cold storage pricing, strict control over cold storage panel quality and temperature parameters, and attentive service. If you would like to learn more about industry-related questions, such as: What types of cold storage insulation materials are there? What materials are used for cold storage insulation? What are the cold storage insulation materials? What are the common types of cold storage insulation materials? For quick-freeze cold storages, what insulation materials are generally available? If you need detailed information on these industry-related topics, please feel free to contact us. Senbin Holding is dedicated to serving you!