Pet Foam Core Structural FRP Sandwich Panel Lightweight Fireproof for Interior Building Wall Systems

Our panel is formulated with a fire-retardant PET foam core and fire-resistant resin systems. It typically achieves a Class B1 (GB 8624) or UL 94 V-0 rating, depending on the final thickness. It is specifically designed to slow flame spread and reduce smoke emission, making it compliant with most interior building safety regulations for commercial and residential marble wall applications.

Not at all. Our fire-retardant additives are integrated at the molecular level within the core and resin, without compromising the surface's chemical bonding properties. The 0.4mm fiberglass surface still provides excellent adhesion for marble veneers, ensuring a permanent, peel-resistant bond while maintaining the required fire safety standards.

Yes. Despite its high density and fire-retardant properties, the PET foam core remains significantly lighter than traditional wood, aluminum, or solid FRP panels (approximately 50-70% lighter). This reduces the load on building structures and allows for easy handling, cutting, and quick installation on vertical wall surfaces without heavy lifting equipment.

The closed-cell structure of our PET foam ensures that the fire-retardant properties remain stable even in high-humidity environments (up to 95% RH). Unlike wood cores that warp or lose integrity, our panel maintains its dimensional stability and fire resistance near moderate heat sources. However, for direct exposure to open flames or extreme heat (>200Celsius), we recommend additional heat-shield barriers.

Absolutely. We can provide third-party test reports (such as GB/T 2408, ASTM E84, or BS 476) upon request. We understand that compliance is critical for construction projects, so we are happy to share the specific certification data and even arrange small sample tests for your local quality inspection before mass production. Please contact us for the certificate package.