PBO plain weave fabric (also known as PBO fabric-Plain) is a high-performance textile material made from PBO fibers (poly(p-phenylene-2,6-benzobisoxazole)) through a plain weave process. It is hailed as the “super fiber of the 21st century.” Many flame retardant fabric manufacturers and flame retardant fabric suppliers now provide PBO fabrics to meet the growing flame retardant fabric market demand.
The production of PBO fiber fabric mainly includes two key stages: fiber preparation and fabric weaving.
Monomer synthesis and polymerization: Typically, 4,6-diaminoresorcinol (DAR) hydrochloride and terephthalic acid (TPA) are used as the main monomers. These undergo solution polycondensation in polyphosphoric acid (PPA). PPA serves both as a solvent and as a polycondensation catalyst. Strict conditions must be maintained to obtain high-molecular-weight PBO polymer.
Fiber spinning: A dry-jet wet spinning process is employed. The liquid-crystalline PBO polymer solution is degassed and filtered before being extruded through spinnerets. The filaments first pass through a short air gap (dry-jet) and then solidify in a coagulation bath (wet spinning). The as-spun fibers (AS grade) already exhibit highly oriented molecular chains, so no drawing is required. For higher modulus fibers, tension heat treatment above 600 °C is applied, producing HM (high-modulus) fibers that typically display a golden metallic sheen.
Warp preparation: 100–300D PBO filament yarns are selected for both warp and weft. Warp yarns are usually twisted (about 230 twists/meter) to enhance cohesion and weaving performance.
Weft preparation: Weft yarns are generally untwisted and wound into bobbins suitable for shuttle weaving.
Weaving: Plain weave structure is used, the most basic weave in which warp and weft yarns interlace alternately (over one, under one). This ensures structural stability and surface smoothness of the fabric. By adjusting warp/weft density and yarn fineness, fabric thickness, weight, and mechanical properties can be tailored.
This makes PBO flame fabric and flame retardant fabric material highly customizable, with options available for buyers searching to buy flame retardant fabric or explore flame retardant fabric for sale from trusted flame retardant fabrics suppliers.
The core advantages of PBO flame fabric lie in its extreme mechanical strength, exceptional thermal stability, and outstanding flame retardancy.
| Property Category | Parameter | Typical Value/Range | Remarks |
|---|---|---|---|
| Mechanical | Tensile strength | 37 cN/dtex (AS), higher for HM | >10× that of steel fiber |
| Elastic modulus | 1150 cN/dtex (AS), 1720 cN/dtex (HM) | ~2× higher than para-aramid | |
| Elongation at break | 3.5% (AS), 2.5% (HM) | ||
| Physical | Density | 1.54–1.56 g/cm³ | Lighter than carbon fiber (1.80–1.87 g/cm³) |
| Linear density | 100–300D | For warp & weft | |
| Thermal | Decomposition temp. | ~650 °C | Stable at 316 °C for 100 h |
| LOI (Limiting Oxygen Index) | 68% | Fabric flame retardant | |
| Continuous service temp. | ~330 °C | ||
| Fabric Parameters | Weave type | Plain weave | Also twill possible |
| Basis weight | 300–1000 g/m² | Customizable | |
| Thickness | 1–25 mm | Customizable | |
| Other | Color | Yellow–orange (HM shows metallic gold sheen) | |
| UV sensitivity | High | Protection required |
Thanks to its extraordinary properties, PBO flame retardant fabric (and its fibers) is widely used in high-tech industries and advanced protective applications.
With the rapid growth of the flame retardant fabric market, demand for PBO fabric for sale continues to increase. Many flame retardant fabric suppliers and flame retardant fabrics suppliers are focusing on inherently flame retardant fabric like PBO due to its durability and safety performance. If you are looking to buy flame retardant fabric with unmatched strength, heat resistance, and non-flammability, PBO is among the most advanced options available.
