PU Cold Storage Panel — High-Density Polyurethane Insulated Sandwich Panels for Industrial Refrigeration
Engineered for cold chain logistics, food processing facilities, pharmaceutical storage, and agricultural preservation. XNAIR PU panels deliver reliable thermal insulation with a rigid polyurethane foam core density of 38–42 kg/m³ and thermal conductivity ≤0.022 W/m·K.
Product Summary
XNAIR polyurethane cold storage panels are factory-prefabricated insulated sandwich panels designed for rapid assembly of temperature-controlled enclosures. Each panel consists of a rigid closed-cell PU foam core (38–42 kg/m³ density) bonded between two metal facings — available in galvanized steel, stainless steel, or aluminum. The cam-lock joint system ensures tight sealing with minimal thermal bridging. These panels are suitable for cold rooms, freezer warehouses, blast freezers, and clean-room environments where consistent internal temperatures between -60°C and +60°C must be maintained with minimal energy loss.
Technical Specifications
The table below lists the core technical parameters that global B2B buyers evaluate when sourcing polyurethane cold storage panels. All values are verified through third-party laboratory testing.
| Parameter | Specification / Range | Unit |
|---|---|---|
| Core Material | Rigid Closed-Cell Polyurethane (PU) Foam, CFC-free blowing agent | — |
| Core Density | 38 – 42 | kg/m³ |
| Thermal Conductivity (λ) | ≤ 0.022 | W/m·K |
| Available Panel Thickness | 50 / 75 / 100 / 120 / 150 / 200 | mm |
| Compressive Strength | ≥ 150 | kPa |
| Fire Rating | B1 (Flame Retardant) / B2 (Self-extinguishing) per DIN 4102 | — |
| Operating Temperature Range | -60 to +60 | °C |
| Metal Facing Options | Galvanized Steel (0.5–0.8mm) / Stainless Steel 304/316 / Aluminum | — |
| Panel Width (Standard) | 960 / 1,000 / 1,130 | mm |
| Panel Length (Customizable) | 2,000 – 12,000 | mm |
| Joint System | Double-locked Cam-lock / Tongue & Groove with EPDM gasket | — |
| Surface Coating | PE (Polyester) / PVDF / Food-grade coating (per request) | — |
| Voltage Compatibility (Accessories) | 220V/50Hz / 380V/60Hz / 480V/60Hz (per region) | — |
Note: The effective internal volume of a cold room built with PU panels is marginally reduced by the panel thickness itself. For example, a 100mm panel subtracts approximately 200mm from each opposing wall dimension. We recommend factoring this into floor-plan calculations during the design phase.
Application Scenarios
XNAIR PU panels are deployed across multiple high-volume procurement industries worldwide. Below are the primary application sectors where these insulated panels deliver measurable thermal performance.
Cold Chain Logistics & Pharmaceutical Storage
In GMP-compliant pharmaceutical distribution centers, temperature deviation can compromise entire batches of vaccines, biologics, and sensitive APIs. XNAIR PU panels with 120–150mm thickness maintain strict 2–8°C or -25°C zones with minimal compressor runtime. The non-porous metal facing is compatible with routine sanitization protocols using hydrogen peroxide vapor or alcohol-based disinfectants.
Food Processing & Agricultural Preservation
For meat, seafood, dairy, and fresh produce cold storage, XNAIR panels provide the consistent low-temperature envelope required to meet HACCP standards. The 100mm and 120mm thickness options are most commonly specified for -18°C frozen food warehouses. Agricultural cooperatives in tropical regions frequently select 150mm panels to offset high ambient temperatures and reduce post-harvest spoilage rates.
Engineering & Construction Details
Each XNAIR PU panel is a composite structure engineered for both thermal performance and mechanical integrity. Understanding the internal construction helps procurement managers evaluate long-term durability.
- Closed-Cell PU Core: The rigid polyurethane foam is blown with a CFC-free cyclopentane-based agent. Each cell is sealed, preventing moisture ingress that would otherwise degrade thermal performance over time.
- Metal Facing Bond: The steel or aluminum facings are bonded to the PU core under high-pressure lamination, achieving peel strength exceeding 0.15 MPa — ensuring the facing does not delaminate under thermal cycling stress.
- Cam-Lock Joint System: The double-locked joint incorporates an integrated EPDM rubber gasket that compresses during assembly, creating a continuous vapor barrier along the entire wall or ceiling plane.
- Edge Protection: Panel edges are reinforced with radiused profiles to resist impact damage from forklifts and pallet handling during both installation and daily warehouse operations.
- Thermal Bridge Mitigation: The joint geometry is designed to minimize the linear thermal transmittance (Psi-value) at panel junctions, reducing condensation risk in high-humidity environments.
Global Adaptability — Regional Performance Considerations
Different geographic regions impose distinct environmental stresses on cold storage envelopes. XNAIR PU panels are specified with regional conditions in mind.
Africa & Middle East — High Ambient Temperature Resilience
In regions where daytime ambient temperatures regularly exceed 45°C, the temperature gradient across the panel envelope is extreme. For these markets, we recommend a minimum 150mm thickness with 42 kg/m³ core density to maintain interior setpoints without excessive compressor cycling. The metal facing's reflective coating also helps reduce solar heat gain when panels are used in exposed external walls.
Europe & North America — Regulatory Compliance & Low-GWP Refrigerant Compatibility
XNAIR PU panels meet CE marking requirements under the EU Construction Products Regulation (CPR). The panel system is fully compatible with low-GWP refrigerants such as R-290 (propane), R-448A, and R-449A, which are increasingly mandated under F-Gas regulations. For the North American market, panels can be supplied with UL-recognized component certifications upon request.
Southeast Asia & South America — High Humidity & Corrosion Protection
In tropical coastal zones with relative humidity consistently above 85%, the panel's closed-cell PU core acts as a built-in vapor barrier. For facilities within 5 km of saltwater coastlines, we specify stainless steel 316L facings to resist chloride-induced pitting corrosion. Export shipments to these regions receive additional anti-moisture desiccant packs inside each crate.
Export Logistics & Packaging Reinforcement
Overseas transportation of large-format insulated panels requires robust packaging to prevent transit damage. XNAIR has developed a standardized export crating protocol based on over a decade of containerized shipping experience.
- Fumigated Plywood Crates: All crates comply with ISPM 15 international phytosanitary standards for wood packaging.
- Internal Cushioning: High-density EPE foam sheets (10mm thick) are placed between each panel layer to absorb vibration during ocean freight.
- Steel Strapping: Each crate is secured with a minimum of four tensioned steel straps to maintain structural integrity during port handling.
- Pre-Shipment Photographic Record: Every sealed crate is photographed from multiple angles before departure, providing a verifiable reference for insurance claims if transit damage occurs.
- 40ft High-Cube Container Optimization: Panel bundles are configured to maximize container fill rates, typically achieving 85–92% volume utilization to reduce per-unit freight cost.
Quality Assurance & Industrial Certifications
Before any XNAIR PU panel leaves the factory floor, it passes through a mandatory multi-point quality control protocol. This rigorous process is designed to give international procurement managers full confidence in product consistency.
Factory Acceptance Testing Protocol:
- Visual Inspection: 100% of panel surfaces are inspected under 500-lux lighting for facing flatness, coating uniformity, and edge finish.
- Dimensional Verification: Random sampling (AQL 2.5, Level II per ISO 2859-1) confirms length, width, thickness, and squareness within ±1.5mm tolerance.
- Core Density Spot Check: A calibrated core sample is extracted from each production batch to verify PU foam density within the 38–42 kg/m³ specification.
- Thermal Conductivity Batch Test: A guarded hot plate apparatus (per ASTM C518 / ISO 8301) validates λ ≤0.022 W/m·K on representative samples.
- Joint Fit Test: Two randomly selected panels from each batch are assembled to verify cam-lock engagement force and gasket compression uniformity.
CE Marking
Compliant with EU CPR for construction products used in temperature-controlled environments.
ISO 9001:2015
Quality management system certified for the design, manufacture, and export of insulated panels.
DIN 4102 B1/B2
Fire behavior classification confirming self-extinguishing properties of the PU foam core.
100% Pre-Shipment QC
Every crate is inspected and photographed before sealing — zero unchecked panels leave our facility.
Frequently Asked Questions
Below are answers to common technical inquiries from international procurement teams evaluating PU cold storage panels.
For a -25°C deep-freeze cold storage room, we recommend a minimum panel thickness of 120mm with 38–42 kg/m³ PU core density. This ensures the interior temperature remains stable while minimizing thermal loss through the panel envelope. For ambient conditions above 35°C, 150mm thickness is advised to reduce compressor cycling frequency and long-term energy consumption.
Yes. XNAIR manufactures PU panels in custom lengths from 2 meters up to 12 meters. We accept detailed CAD drawings for non-standard trapezoidal, angled, or stepped panel configurations. Each custom order goes through a dedicated engineering review before production approval. Minimum order quantities may apply for highly specialized dimensions.
All XNAIR PU panels are packed in heavy-duty fumigated plywood crates with internal foam cushioning and edge protectors. Each crate is reinforced with steel strapping for containerized ocean freight. We perform 100% pre-shipment inspection and photograph every crate before sealing. In the rare event of transit damage, we provide a claims support package including pre-shipment photos and packing lists to assist with insurance filing.
Under normal operating conditions with proper installation and maintenance, XNAIR PU cold storage panels have a design service life exceeding 20 years. The rigid polyurethane foam core is closed-cell and hydrophobic, meaning it does not absorb moisture over time. The galvanized or stainless steel facings are coated to resist corrosion in humid and low-temperature environments.