In the field of cold chain logistics and food preservation, the insulation performance of cold storage directly determines energy consumption costs and product quality. Polyurethane (PU) rigid foam, with its leading comprehensive properties, has become the top choice for modern high-efficiency cold storage insulation layers. Feilong Polyurethane Equipment is dedicated to providing core equipment support for the high-quality, high-efficiency production of this key material.
1. Core Advantages: Why Polyurethane Dominates?
(1) Unparalleled Ultra-Low Thermal Conductivity
PU rigid foam is filled with uniform, dense tiny closed pores (closed pore rate > 90%). The gas inside (now shifting to low GWP cyclopentane, water, etc.) has extremely low thermal conductivity. Its λ value (0.018-0.024W/(m·K)) is far lower than traditional materials (EPS/XPS: 0.033-0.040; mineral wool: 0.035-0.045). This allows thinner insulation layers to meet requirements, boosting storage capacity or cutting cold loss—e.g., a large food cold storage saw >25% monthly electricity reduction after switching to PU.
(2) Excellent Structural Strength & Dimensional Stability
High-pressure foaming gives PU foam compressive strength (>150kPa) and flexural strength, bonding firmly with cold storage panels to form a high-strength "sandwich" structure. It resists shrinkage, deformation, or cracking in -50°C to +80°C and humidity changes, eliminating cold bridges. Its service life (>20 years) surpasses traditional materials (10-15 years).
(3) Superior Closed Pore Rate & Moisture/Vapor Barrier
A >90% closed pore rate forms a dense barrier against water vapor. This prevents reduced insulation (water has higher thermal conductivity than PU) and structural damage from ice expansion. It resists water vapor, chemicals, etc., reducing maintenance/replacement and saving costs over decades.
(4) Efficient Seamless Bonding & Overall Sealing
PU foam’s fluidity fills cavities perfectly, forming strong chemical bonds with steel, aluminum, color steel, and wood. On-site foaming or continuous sheet forming creates seamless insulation, eliminating joint cold bridges (a flaw in traditional spliced materials) and boosting air tightness—ensuring uniform, stable cold storage temperatures.
(5) Lightweight, High-Strength & Easy to Install
PU insulation is lighter than alternatives with the same performance, reducing structural load. Prefabricated PU core panels install quickly; on-site spraying/pouring suits complex structures, shortening construction time.
(6) Durability & Longevity
High-quality PU resists aging and chemicals, meeting refrigeration needs. With proper design/construction, it retains insulation performance for 20-30+ years, delivering long-term returns.
II. Foundation of Superior Materials: Feilong’s Precision Polyurethane Foaming Equipment
PU’s performance relies on equipment accuracy, stability, and process adaptability. Feilong provides core support:
(1) High-Precision Metering & Mixing System
High-precision pumps (gear, piston) and closed-loop control keep polyol-isocyanate mixing ratios accurate (error <±1.5%)—critical for ideal cell structure and stable performance. Advanced mixing heads ensure uniform, fast (millisecond) mixing for consistent foam.
(2) Precise Temperature Control
Controlling raw material (20±2°C) and mold/environment temperatures optimizes reaction speed, cell fineness, and adhesion. Feilong’s efficient oil/water circulation systems maintain stable process temperatures.
(3) Intelligent Control & Data Management
PLC/HMI systems automate parameter setting, monitoring, and fault diagnosis. Real-time recording of pressure, temperature, flow, etc., supports quality traceability and consistency.
(4) Diversified Equipment Solutions
1. Continuous sheet lines: Efficiently produce PU/PIR composite panels for large-scale cold storage.
2. High-pressure foaming machines: For on-site spraying/pouring (walls, roofs, doors) or prefabricating custom parts (cold storage doors, fan casings).
3. Elastomer/special equipment: Makes seals, buffers, etc.
(5) Energy-Saving & Eco-Friendly Design
Optimized systems reduce standby energy use. Compatibility with low-GWP foaming agents (cyclopentane, water) helps meet strict environmental regulations.
III. Choose Feilong: Solidify Cold Chain Insulation
PU’s cold storage performance is a blend of science and manufacturing. Feilong’s precise, reliable equipment unlocks PU’s potential:
1. Ensures material quality: High-precision tools make consistent, high-performance PU.
2. Boosts efficiency: Automated lines increase output, cut costs.
3. Guarantees long-term value: Stable operation ensures lasting, energy-saving insulation.
Feilong Polyurethane Equipment—powering efficient, eco-friendly, safe, durable cold storage insulation!
Contact Feilong’s experts for customized PU equipment solutions!
