EPS Sandwich Panels

EPS panels offer the lowest cost and lightest weight, providing excellent thermal insulation for standard warehouses and modular housing. PUR/PIR offers superior thermal efficiency (lower thermal conductivity of 0.022 W/m·K) required for deep-freeze storage, while Rock Wool provides non-combustible Class A fireproofing mandatory for high-risk industrial facilities.

Standard industrial panels utilize EPS core densities of 14 kg/m³ to 18 kg/m³, balancing compressive strength and insulation. For building safety certification, the foam must contain flame-retardant additives conforming to DIN 4102 B1 or ASTM E84 Class A, ensuring the core self-extinguishes when exposed to small flame sources.

Core thickness commonly ranges from 50 mm, 75 mm, 100 mm, to 150 mm. Standard panel width is 950 mm for corrugated roof panels and 950 mm or 1150 mm for flat/micro-ribbed wall panels. Depending on panel thickness and design wind/snow loads, panels typically span 2.5 to 4.5 meters between structural steel purlins.

Roof panels feature an overlapping high crest with a built-in anti-capillary groove that breaks rainwater surface tension. Wall panels utilize deep tongue-and-groove (interlocking) joints, often fitted with factory-installed EPDM rubber gaskets or concealed fastening clips that eliminate exposed screw penetrations and prevent thermal bridging.

Facings consist of hot-dip galvanized steel (GI) or galvalume (GL) with nominal thicknesses from 0.40 mm to 0.70 mm. The outer side is coated with 20–25 μm primer and topcoat (PE, SMP, or PVDF) in standard RAL colors, while the inner side has a 5–7 μm service coat suitable for indoor washing and sanitization.

Continuous lines combine decoiling, roll forming of upper/lower steel sheets, EPS block infeed, multi-stream polyurethane glue metering, continuous heated caterpillar press lamination, and synchronized high-speed flying bandsaw cut-off, achieving continuous production speeds of 4 to 8 m/min.

Buyers should confirm panel type (roof vs. wall vs. cleanroom), core thickness (50/75/100/150 mm), EPS density (kg/m³), flame-retardant rating (B1 or standard), upper and lower steel skin thickness (e.g. 0.5 mm / 0.4 mm), color (RAL code), and project length schedules.