What is mineral fibre?

Per GB/T 4132-1996, man-made mineral fibres are the general term for inorganic fibres made from rock, slag, glass, metal oxides or porcelain clay. Boer products are made mainly from natural rocks such as diabase, basalt and dolomite, processed by melting, wet-process purification and surface treatment.

What does Boer's wet process mean?

Raw materials are melted in a cupola furnace and fibreised by a four-roll centrifugal spinner. Fibres are separated from shot in the settling chamber, then collected by hub collectors, purified, dried and packaged. The water medium eliminates electrostatic attraction between fibres and shot, and separates them by their different gravity and drag in motion.

What is shot content and how is it controlled?

Shot refers to non-fibrous material in the fibre (usually counted above 125 μm). Boer separates fibre from shot in the settling chamber through the wet process; some models control non-fibrous content below 1%. Specific values are subject to the batch test report.

Melting point and heat resistance?

Standard models have a melting point above 1000 ℃; the white-fibre series (e.g. BE-B03, BE-B07, BE-C08) has a melting point above 1600 ℃. Specific values are subject to the batch test report.

Dispersibility and resin bonding?

The wet process gives a more uniform surface treatment; the fibre is hydrophilic and easy to disperse, bonding well with phenolic resin, and is suitable for friction and sealing material formulations.

Does Boer fibre contain asbestos?

No. Boer products are asbestos-free man-made mineral fibres and have passed SGS asbestos testing (report CANEC25025290506, 2025-10-22); all 6 asbestos types, including chrysotile, were not detected (XRD/PLM, detection limit 0.1%).

Is Boer fibre RoHS/SVHC compliant?

Yes. Products have passed RoHS 10-substance testing (CANEC25025290502) and SVHC 250-substance testing (CANEC25025290504), complying with applicable REACH requirements.

Is an MSDS/SDS available?

Yes. Boer can provide MSDS/SDS prepared in accordance with REACH Annex II (e.g. EECSSDS2605060802), and the batch test report is delivered with each shipment.

What are the packaging and storage requirements?

Normally moisture-proof laminated bags or eco-friendly paper bags, with custom packaging on request. Store in a dry, ventilated place away from moisture, open flame and strong oxidizers.

How can I select a product and contact Boer?

Call the national sales hotline 4006-0763-82 or email info@boerfibre.com. Boer provides selection advice, samples and batch test reports.

Potassium titanate whiskers compared with other fibres

Category Raw Materials Published 2026-03-31 Source www.boerfibre.com

Abstract

This article compares hexapotassium titanate whiskers with other fibres commonly used in friction materials — E-glass, steel fibre, copper fibre, Kevlar® 29 and type-I high-modulus carbon fibre — across density, melting point, heat capacity, thermal conductivity, coefficient of thermal expansion, tensile strength and elastic modulus.

The article argues that no single substitute fibre can alone replace asbestos: glass fibre bonds poorly with resin/rubber/filler and is hard (noise, vibration); steel fibre is heavy, hard and rust-prone and is limited mainly to front brake pads; man-made mineral fibres (the second-generation substitutes) contain shot and disperse with difficulty. Hexapotassium titanate whiskers are described as non-toxic, with a high melting point (~1350 ℃), service temperature up to 1000 ℃ (against about 400 ℃ for asbestos), a negative temperature coefficient of thermal conductivity and over 90% infrared reflectance; their loose powder form disperses easily, and they can be combined with a synthetic inorganic fibre for macro reinforcement in ceramic friction materials.

Key facts

Comparison set: E-glass, steel, copper, Kevlar® 29, hexapotassium titanate, type-I high-modulus carbon fibre
Reported hexapotassium titanate: density 3.3 g/cm³; melting point ~1350 ℃; tensile strength 7 GPa; modulus 280 GPa; CTE 6.8×10⁻⁶/K
Service temperature: up to ~1000 ℃ vs ~400 ℃ for asbestos (per original article)
Thermal behaviour: over 90% infrared reflectance; negative temperature coefficient of thermal conductivity (lower at higher temperature)
Dispersion: loose macro-powder form, easy to disperse
Use direction: combined with a synthetic inorganic fibre for ceramic friction materials

The original article is in Chinese; see the Chinese version for the full text. This page provides the English title, abstract and key facts only — translated and compiled from the original, without full verbatim translation.

Potassium titanate whiskers compared with other fibres

Abstract

Key facts

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