STB100: Thickness 100.0 mm

• Outer panel: 2 mm double-sided galvanized steel sheet with double-sided plastic powder coating
• Core filling: approx. 100.0 mm high-density mineral wool wrapped with fiberglass cloth
• Fire rating: Class A1
• Inner perforated panel: 1.5 mm double-sided galvanized perforated steel sheet, perforation rate approx. 46%

Design Features

This standard panel system is movable, allowing flexible reconfiguration to suit customer preferences. Panels can be reused and adapted to match other building structures on site.

All components are prefabricated in factory. On-site installation only requires sliding absorber panels into cross keels followed by screw fastening; no on-site cutting, welding or other secondary processing is needed.

Formaldehyde content is 0.16 mg/L, lower than the 0.5 mg/L limit specified for China National Standard E0 grade.

Steel Sheet Fabrication Process

All panels are processed via CNC laser shears and CNC bending machines, ensuring overall machining tolerance within ±1 mm.

2 mm-thick Z275 galvanized steel is adopted, guaranteeing flatness within 2 mm over a 2 m span.

Surface Treatment of Perforated Steel Panels

Multi-layer plastic powder coating is applied, complying with ISO 12944 C4-High standard.

Our coating system also meets ISO 12944-2 Table 1 C3-High standard with a service life exceeding 30 years. The coating equipment delivers superior surface quality, high reliability and eco-friendly performance.

Coating System Composition

• Galvanized steel substrate, zinc coating thickness approx. 20 µm

• Double-sided iron phosphate conversion coating: SKPhor W 730 (adhesion layer)

• Polyester powder topcoat: Freiotherm Pulverlack KPP-60NE158, lead-free & chromate-free, nominal dry film thickness (NDFT) approx. 80 µm

• Total nominal dry film thickness: 99 ± 24 µm

• Surface finish: smooth, glossy or customized texture upon request

■ All Types of Acoustic Test Environments