Detailed Introduction

Armurex^™ PBI Fiber

Armurex PBI filament yarn

Product Overview

Armurex^™ PBI fiber is based on polybenzimidazole (PBI) and offers inherent flame retardancy and excellent high-temperature resistance — it self-extinguishes when the flame is removed and does not melt-drip. It can be produced by dry, wet, and electrospinning processes into filament yarn, staple fiber, and nanofiber, and is widely used in fire protection, aerospace, high-temperature filtration and sealing, and composite applications where safety and reliability are critical.

Key Features

Inherent flame retardancy: self-extinguishing, no melting or dripping;
High-temperature resistance: thermal decomposition temperature above 600 °C, meeting the demands of high-temperature service;
Lightweight: density of 1.30 g/cm³, giving it a weight advantage among comparable high-performance fibers;
Comfortable moisture uptake: moisture regain of 15%; staple and filament grades differ in elongation and modulus (staple for flexibility, filament for high modulus), selected according to the application;
Multi-form spinnability: dry, wet, and electrospinning processes for filament, staple, and nanofiber.

Fiber Specifications

Property	Unit	Staple (STA-01)	Filament (F1)
Linear density	dtex	1.65–2.2	1.9 (24F)
Cut length	mm	38 / 51 (±5%)	—
Tenacity	cN/dtex	≥2 (typ. 3)	4.4
Elongation at break	%	20–35	16
Initial modulus	cN/dtex	—	174
Crimp	per 25 mm	5–12	—
Limiting oxygen index (LOI)	%	≥38 (typ. 41)	≥38 (typ. 41)

Typical values, not batch guarantees. Staple figures per controlled TDS RB-PBI-STA-TDS-2026-001; filament figures are third-party test typical values (2025-11). Custom linear density and cut length available.

Comparison with Comparable Materials

The core advantages of Armurex^™ PBI fiber lie in inherent flame retardancy (self-extinguishing, no melt-drip), property retention at high temperature and chemical stability — not in tensile strength. For measured comparison data against the material you currently use, please contact our technical team.

Typical Applications

Fire and protective apparel: flame-retardant and heat-insulating, wear- and impact-resistant; short-term exposure up to 500 °C; thermal decomposition above 600 °C;
Aerospace: high-temperature structural parts and non-metallic engine-adjacent components;
Industry: high-temperature filtration media, conveyor belts, friction and sealing fillers;
Composite materials: thermal barriers, insulation and reinforcement in high-temperature service.

Need samples, custom specifications, or a quotation? Contact sales@riebom.com or leave a message below — we reply within one business day.

Armurex^™ and Repazole^® are trademarks of Guangzhou Riebom New Material Technology Research Co., Ltd.