What does Boer make? A full view of its two application fields: friction and sealing

Category About Boer Published 2026-10-19 Source www.boerfibre.com
What does Boer make? A full view of its two application fields: friction and sealing

Abstract

Boer's products concentrate in two application fields. The first is fibres for friction materials — disc/drum brake pads, railway brake shoes, clutch facings and engineering-machinery friction plates. The second is fibres for sealing materials — rolled and sheet-rolling (Hatschek) asbestos-free gaskets and paper-based sheets. Both fields share the natural-rock fibre route, matched to different processes by L/D and shot grading. The wet-process purification and surface treatment steps are Boer's proprietary process and are not disclosed; only front-end areas such as raw material preparation and melt-fibre formation are visitable.

For friction materials, representative models and characteristics are: BE-SL05/S05/S01/S08/TL13/TL16/GL3, melting point >1000°C, L/D about 40–80, shot mostly <2–3% (SL05 <1%). Selection by product and duty: disc/drum pads value dispersion, resin bonding and wear/noise (L/D 40–60); clutch facings need higher L/D and high-temperature stability (S08/TL series L/D 70–80); railway shoes and engineering-machinery plates face high-energy heavy-duty braking and rely on heat resistance (>1000°C, company data) and reinforcement. BE-GL3 is a cost-oriented grade (shot <5%, L/D ≥50) to be confirmed by product testing.

For sealing materials, the two main forming processes demand different fibres. For rolled gaskets, BE-SG21 (L/D ≥150, shot <1%) targets higher requirements and BE-SG18 (L/D ≥100, shot <2%) is the standard grade. For sheet-rolling/paper-based sheets, BE-C17 (L/D ≥100, shot <2%) suits the paper-like forming process. Shared needs are high purity (shot directly affects gasket surface and sealing), rubber compatibility and sheet tensile strength.

Common base properties (company-data basis): raw materials of diabase, basalt, dolomite; friction-series chemistry SiO₂+Al₂O₃ 52–62%, CaO+MgO 24–33%, Fe₂O₃ 2.5–8%; melting point >1000°C; Mohs hardness about 6; moisture <2%; surface-treatment level ≤6%; loss on ignition ≤1%; with asbestos-free XRD, SGS RoHS, SGS SVHC and SDS/MSDS. Final matching: fix the process, pick the L/D and shot grade, validate with a fixed-formulation sample, and lock compliance for export.

Key facts

  • Friction models: BE-SL05/S05/S01/S08/TL13/TL16/GL3; L/D ~40–80; shot <2–3%
  • Sealing models: BE-SG21/SG18 (rolled), BE-C17 (sheet-rolling); L/D 100–150; shot <1–2%
  • Melting point: >1000°C; density ~2.82 g/cm³ Mohs hardness ~6
  • Compliance: asbestos-free XRD, SGS RoHS, SGS SVHC, SDS/MSDS

The original article is in Chinese; see the Chinese version for the full text. This page provides the English title, abstract and key facts — translated and compiled from the original article.