Boer Fibre — wet-process made

The wet process is Boer's core manufacturing route: natural rocks such as diabase and basalt are melted in a cupola furnace and fibreised by a four-roll centrifugal spinner; shot and fibre are then separated by hydraulic / wet purification, followed by dispersion and opening, shot removal, length setting, surface treatment and drying, yielding reinforcement fibres with low shot content and good dispersion. The Boer brand proposition is: Boer Fibre, wet-process made!

In the dry process, fibre is collected directly after fibreising; electrostatic adsorption between fibre and shot means separation relies mainly on air-current screening. In the wet process, water wets and opens the fibre first, eliminating electrostatic adsorption; shot then settles by gravity and resistance difference before de-shotting, length setting, thickening and drying. Wet-process products therefore have lower shot content, more uniform surface treatment and better dispersion.

Once the water medium wets the fibres, electrostatic adsorption between fibre and shot is eliminated. In the wet purification line, shot consists of solid non-fibrous particles with high density, which settle and are discharged by gravity and resistance difference during hydraulic de-shotting; fibres follow the water flow into the length-setting device and thickener, producing finished fibre with low shot content.

The L/D ratio (fibre length over diameter) affects the reinforcement skeleton effect and mixing uniformity: a higher ratio helps reinforcement, but too high a ratio increases the risk of fibre entanglement and clumping. Boer controls the L/D ratio during production (e.g. BE-S06 and BE-SG21 are rated L/D ≥150); specific values are per the batch test report.

Standard models have a melting point above 1000℃; the white-fibre series (BE-B03, BE-B07, BE-C08) is above 1600℃, suited to high-temperature braking, sealing and coating conditions. Specific parameters are subject to the batch test report.

In addition to in-house QC, Boer has passed X-ray diffraction asbestos testing at the National Non-metallic Minerals Products Quality Supervision and Inspection Center, Shanghai Institute of Ceramics of the Chinese Academy of Sciences, PONY Testing, CTI and SGS. The latest SGS report CANEC25025290506 (2025-10-22), by XRD/PLM, shows chrysotile and 5 other asbestos types all not detected (detection limit 0.1%).

SGS RoHS 10-substance testing (CANEC25025290502, in line with EU RoHS Directive 2011/65/EU and amendment (EU) 2015/863) and SVHC 250-substance testing (CANEC25025290504, results ≤0.1%) were passed; an SDS compiled per REACH Annex II is provided as compliance reference material for export to the EU market.

The batch test report, MSDS/SDS (number EECSSDS2605060802) and originals of the SGS asbestos, RoHS and SVHC reports are available for verification. Boer also compiles technical material such as its ten-year paper collection, available from the sales team.

Tell Boer your product type (brake pads / shoes, roller-pressed or beater-add gaskets, coating short-cut), process route and current formulation; the Boer technical team recommends models and provides sampling and formulation tuning support. Final specifications are subject to written confirmation.

Call the national sales hotline 4006-0763-82 or email info@boerfibre.com; the Boer technical team will assist with model selection and formulation tuning.