A complete overview of Boer's BE-series mineral fibre models for friction materials

Category Products & Process Published 2026-10-19 Source www.boerfibre.com
A complete overview of Boer's BE-series mineral fibre models for friction materials

Abstract

Boer's BE-series mineral fibres split by downstream process into a friction family and a sealing family. The friction family comprises BE-SL05, BE-S05, BE-S01, BE-GL3, BE-S08, BE-TL13 and BE-TL16; the sealing family comprises BE-SG21, BE-SG18 and BE-C17. The core distinguishing criteria are the length-to-diameter ratio (L/D) and the shot content above 125µm. Parameters below are company product data; the batch outgoing report governs.

A model number is not a marketing code but an engineering designation fixing three key criteria: L/D, shot content and matched process. Friction and sealing makers differ in formulation, mixing and hot-pressing/forming, so they differ in fibre fineness, length and purity. Friction models and parameters (L/D, shot >125µm): BE-SL05 ≥60 / <1%; BE-S05 ≥50 / <2%; BE-S01 ≥40 / <2%; BE-GL3 ≥50 / <5%; BE-S08 ≥70 / <2%; BE-TL13 ≥80 / <3%; BE-TL16 ≥80 / <3%. Higher L/D and lower shot generally correspond to a stronger skeletal-reinforcement orientation; whether a model suits a drum or disc pad is to be confirmed by sampling with your own formulation.

Sealing models, split by forming process: BE-SG21 (L/D ≥150, shot <1%) and BE-SG18 (L/D ≥100, shot <2%) for rolled asbestos-free gaskets; BE-C17 (L/D ≥100, shot <2%) for sheet-rolling (Hatschek) paper-based sheets/sealing boards. Sealing generally demands tighter shot (e.g. <1%) for web uniformity and tensile strength.

How to use the table for a first screen: fix the process (friction dry-mix/hot-press vs. sealing rolled/sheet-rolling); pick the reinforcement orientation (higher L/D such as S08, TL13/16, SG21 when longer fibre is needed); and confirm the shot basis (>125µm) matches your lab method, requesting the outgoing report by lot. Common physical properties across the series: density about 2.82 g/cm³, melting point >1000°C, Mohs hardness about 6, moisture <2%, surface treatment ≤6%, loss on ignition ≤1%. Fibre does not alone determine brake noise, wear or sealing — those also depend on formulation, mixing and hot-pressing/forming.

Key facts

  • Friction family: BE-SL05/S05/S01/GL3/S08/TL13/TL16
  • Sealing family: BE-SG21/SG18 (rolled), BE-C17 (sheet-rolling)
  • Key split criteria: L/D and shot (>125µm)
  • Common physicals: density ~2.82 g/cm³; melting >1000°C; Mohs ~6; moisture <2%

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.