New Energy-saving & Purification Building Panels

In modern cleanroom projects, cold-chain warehouses, industrial workshops and high-end prefabricated construction sectors, hand-made PU sandwich panels serve as core energy-saving building materials to replace conventional wall panels, featuring outstanding thermal insulation performance, flexible customization and excellent structural stability. Different from mass-produced machine-made sandwich panels, hand-made PU sandwich panels adopt refined manual lamination technology, balancing performance, precision and adaptability. They are the preferred panel solution for niche special building projects and high-standard purification works.

Hand-laminated PU sandwich panel is a typical composite sandwich panel. It is manufactured by high-pressure bonding and refined manual lamination of top & bottom face sheets with high-density PU core material. It features compact structure and high integrity, free from hollowing and delamination.

Face sheets can be flexibly customized according to application scenarios. The mainstream options are 0.4–0.6 mm galvanized color steel sheets and stainless steel sheets. Aluminum alloy, fiberglass composite panels and other materials are also available. The surface is smooth and flat, dust-proof, corrosion-resistant and easy to clean, meeting the requirements of cleanroom environments. The core material is rigid PU foam with a complete closed-cell honeycomb structure. It has high porosity and excellent airtightness, blocking the transfer of hot and cold air fundamentally. It ranks among the top building core materials for thermal insulation performance currently.

Its core advantage comes from the hand-laminated production process. Unlike machine-made panels produced on assembly lines with fixed specifications, hand-laminated panels allow precise adjustment of panel thickness, dimensions, profiles and joint structures according to project requirements, delivering excellent adaptability for irregular sizes, special trims and non-standard details. The manufacturing involves multiple procedures including manual glue application, precise alignment, pressure curing, edge finishing and sealing treatment. The panels feature higher bonding strength, much better edge regularity and joint airtightness than ordinary machine-made panels, effectively avoiding common issues such as air leakage, cold leakage and deformation.

1. Ultimate Thermal Insulation & High Energy Efficiency

The rigid PU core material achieves a low thermal conductivity of 0.022–0.028 W/(m·K). Its thermal insulation performance far outperforms traditional insulation boards such as rock wool and foam glass. The unique closed-cell structure allows almost no air circulation and thoroughly blocks cold bridge and heat bridge transfer. At the same thickness, its insulation effect is over 40% higher than that of traditional panels, effectively stabilizing indoor temperature. When applied in cold storage and constant-temperature workshops, it can greatly reduce energy consumption of air conditioning and refrigeration equipment, delivering remarkable long-term energy-saving benefits and complying with the low-carbon development concept of green buildings.

2. Stable Structure, Compressive & Durable

The panel features high overall composite strength. The core material has a compressive strength of 150–300 kPa with excellent load-bearing capacity and impact resistance, resisting deformation and cracking. The metal face sheets are tightly bonded to the PU core, offering great overall rigidity. It can be directly used as enclosure structures for walls, ceilings and roofs without additional plastering or reinforcement. The panel enjoys a long service life with good aging resistance and humidity-heat resistance, suitable for various complex indoor and outdoor working conditions.

3. Clean, Moisture-proof for Purification Applications

The panel has a flat and smooth surface with no seams or pores. It does not accumulate dust or breed bacteria and boasts outstanding waterproof and moisture-proof performance, which can effectively block water vapor penetration and prevent the panel from mildewing or peeling due to moisture. Meanwhile, the panel is non-toxic, odorless, eco-friendly and pollution-free, complying with sanitary standards for clean workshops, hospital operating rooms and food processing workshops. It serves as the core specialized panel for purification projects.

4. Efficient and Convenient Installation Hand-laminated

PU sandwich panels are integrated finished panels requiring no secondary decoration or plastering for leveling. They can be directly spliced and installed after delivery. The panels adopt special sealing structures at joints for tight connection and easy assembly, greatly shortening the construction period and cutting labor costs. In addition, the panels are lightweight to reduce the load on the main building structure, meeting the rapid construction requirements of prefabricated buildings.

5. Safe Flame Retardancy, Compliant with Building Codes

The flame-retardant modified PU core material can reach Class B1 difficult-to-ignite fire rating. It resists flame spread and produces no drips when exposed to fire, effectively slowing fire propagation. It meets fire code requirements for most industrial and civil buildings, balancing operational safety and stable performance.

Hand-laminated PU sandwich panels support highly personalized customization to fit various non-standard engineering scenarios. The standard width in the industry is 1180 mm. Panel thickness can be customized at 50 mm, 75 mm, 100 mm, 150 mm, 200 mm and other sizes, and the length can be precisely cut according to on-site construction dimensions. The thickness, material and coating color of face sheets can be adjusted as required. Custom exclusive profiles such as special sealed joints, fire-enhanced type and sound-insulation reinforced type are also available to perfectly meet differentiated demands of various application scenarios.

Benefiting from the combined advantages of thermal insulation, cleanliness, fire resistance, moisture resistance and customizability, hand-laminated PU sandwich panels have highly targeted application scenarios, mainly covering high-standard and high-demand construction projects:

Cleanroom purification projects: wall and ceiling enclosures for dust-free workshops in food, pharmaceutical, electronics and precision instrument industries, as well as hospital operating rooms, sterile laboratories and disinfection rooms;

Cold-chain temperature-controlled projects: thermal insulation enclosure structures for various high and low temperature cold storage, constant-temperature warehouses, fresh-keeping workshops and cold-chain cabins;

Industrial buildings: wall construction for constant-temperature factories, dehumidification workshops, sound-insulation workshops and thermal insulation machine rooms for special equipment;

Prefabricated temporary buildings: thermal insulation enclosures for high-end constant-temperature temporary constructions, epidemic isolation cabins and equipment cabins, suitable for use in complex environments;

Special energy-saving buildings: civil buildings, laboratories and storage buildings with high requirements for thermal insulation, sound insulation and cleanliness.

Compared with machine-made sandwich panels which feature standardization and strong versatility but insufficient precision, hand-laminated PU sandwich panels stand out for refined craftsmanship, high adaptability and superior performance, making up for the shortcomings of mass-produced panels in non-standard projects and high-standard scenarios. They integrate thermal insulation, fire resistance, cleanliness, moisture resistance, load-bearing capacity and energy efficiency in one, combining practicality with economy, and feature convenient installation and low maintenance costs. At a time when building energy-efficiency upgrading, the popularization of prefabricated buildings and the standardized development of cleanroom projects are advancing, hand-laminated PU sandwich panels, with their irreplaceable customization advantages and stable performance, have become the preferred enclosure material for high-end industrial buildings and special projects, providing solid material support for green low-carbon buildings and high-standard clean space construction.

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