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.

Release agents and mould cleaners

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

Abstract

All friction materials and some sealing materials are mould-processed, requiring release agents to separate the moulding from the die and strong cleaners to remove bonded residue, oil and scale after use. The traditional release agent, zinc stearate (added internally or brushed externally), is described as heat-sensitive, with weak anti-stick and lubricating effect, “frosting” the part surface on heating/cooling, and releasing chemical vapours harmful to workers; it has been replaced by new release agents.

The article lists products from Qingdao Dehui Fine Chemical (eight series, 60+ varieties), including a semi-permanent release agent (E527), water-dilutable emulsion release agents (7300, 7320) and a strong mould cleaner (Q101A), plus a newer DG-25S release agent (distributed by Foshan Dinggu Industrial Materials, a Taiwan product) formulated for the friction-material industry and diluted about 30–70 times with tap or soft water.

Key facts

Function: release (separate moulding from die) plus cleaning (remove coke, polymer, oil, rust)
Traditional agent: zinc stearate — heat-limited, frosting, harmful vapours (per original article)
Supplier: Qingdao Dehui Fine Chemical; 8 series, 60+ varieties
Listed models: E527 (semi-permanent); 7300 / 7320 (concentrated emulsions); Q101A (strong cleaner)
Newer model: DG-25S (Foshan Dinggu, Taiwan product); dilute about 30–70× with water
Storage: emulsions water-dilutable; storage stability about 1–2 years per table

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.

Release agents and mould cleaners

Abstract

Key facts

10 things you may want to know about Raw Materials

More about Boer Fibre