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.

Attapulgite clay

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

Abstract

Attapulgite is a layered-chain hydrated magnesium aluminium silicate, ideal formula Mg₅Si₈O₂₀(OH)₂(OH₂)₄·4H₂O, occurring in rod-like/fibrous form 0.5–5 µm long and white to light grey/green/brown depending on impurities. Theoretical chemistry: MgO 23.83%, SiO₂ 56.96%, H₂O 19.21%; density 2.05–2.30 g/cm³, Mohs hardness 2–3, with good stability at high temperature and in brine.

Originally used as an adsorbent, decolouriser, purifying agent and pigment carrier in chemical, pharmaceutical, dyeing and environmental industries, attapulgite has recently entered friction materials. Its rod/fibre morphology (aspect ratio 10–30) gives some reinforcement; its hollow tubular, microporous structure gives a specific surface area up to 150 m²/g after milling, bonding well with resin and absorbing liquid/gaseous low-molecular species released during high-temperature friction for a self-cleaning surface; its layered-chain structure and low hardness give wear-reducing and friction-coefficient-adjusting effect; it does not swell in water and shrinks little on drying, suiting wetted brake pads. The article notes Chinese mine purity is limited (up to about 50–70%), so stable supply and strict incoming inspection are advised.

Key facts

Mineral: layered-chain hydrated Mg-Al silicate; ideal Mg₅Si₈O₂₀(OH)₂(OH₂)₄·4H₂O
Morphology: rod/fibre 0.5–5 µm; aspect ratio 10–30
Properties: density 2.05–2.30 g/cm³; Mohs 2–3; stable in high temperature and brine
Specific surface area: up to 150 m²/g after milling
Benefits cited: reinforcement, resin bonding, friction-surface self-cleaning, wear reduction, no water swelling
Caveat: Chinese ore purity up to ~50–70%; require stable supply and strict inspection

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.

Attapulgite clay

Abstract

Key facts

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