Sandwich panels are lightweight building materials composed of high-strength facing materials and a lightweight core. Their primary characteristics are as follows:
Structural Characteristics: They feature a "sandwich" composite structure; facings typically consist of thin metal sheets or fiberboards, while core materials include rock wool, polyurethane, paper honeycomb, and others. They offer high specific strength, with a typical weight of less than 24 kg/m².
Performance Advantages: They generally provide thermal insulation (with thermal conductivity as low as 0.036 W/m·K) and sound insulation (32–50 dB). Products with cores such as rock wool can meet Class A non-combustibility standards, with fire resistance exceeding 1,000°C.
Practical Attributes: Production utilizes automated processes, eliminating the need for on-site secondary processing. Daily installation coverage can reach 600–800 m², significantly shortening construction timelines, while specifications and dimensions can be customized to meet specific needs.
Cost Advantages: Core materials are cost-effective and used in large volumes, while facing materials are used sparingly, keeping overall production costs manageable. Performance can also be flexibly adjusted by combining different facings and core materials to suit various application scenarios.
