PAN precursor for carbon fiber

Roughly 90% of the world's carbon fibre begins as a single material: polyacrylonitrile, or PAN. It is the precursor spun into fibre, oxidised, and carbonised into the strong, light filament on which aerospace, wind, EV, and defence roadmaps depend. India makes almost none of it. As of 2024, the country relies on imports for close to 90% of its carbon fibre needs, sourced largely from Japan, France, and the United States.

The difficulty is real and it sits upstream. PAN precursor manufacturing is the most capital-intensive and technologically demanding part of the value chain — the segment where India has almost no presence. Only a handful of nations hold this capability at scale. Five producers control roughly 72–75% of global capacity, with Japan's Toray alone commanding about 34–36% across facilities in Japan, the US, France, and South Korea. That concentration reflects the decades-long investment cycles required to build precursor and fibre infrastructure. Global capacity itself stays constrained at around 180,000 tonnes a year.

India is not starting from zero. CSIR–National Aerospace Laboratories established an integrated carbon fibre and prepreg facility in 2003 and runs a pilot plant — 25 kg/hr polymerisation, wet spinning, multi-stage heat treatment — that has demonstrated the full PAN-to-fibre conversion, producing Standard Modulus (3.4 GPa tensile strength, 245 GPa modulus) and Intermediate Modulus grades. NAL has signed a know-how transfer MoU with Kemrock for a 300-tonne-per-annum plant. Reliance Industries has announced India's first commercial-scale carbon fibre plant at Hazira, Gujarat — 20,000 tonnes per annum on acrylonitrile feedstock — within a ₹75,000 crore commitment to new materials, and has acquired Kemrock's former facility to integrate precursor, fibre, and composite production. Jindal Advanced Materials, partnering Italy's MAE S.p.A., has committed USD 327 million for a 3,500-tonne plant expandable to 10,000 tonnes by 2027. A BARC–HAL–MIDHANI consortium is targeting strategic T100-type fibre within 2.5 years.

The gap persists because the demonstrated capability has not yet crossed into operating commercial precursor supply. No commercial PAN precursor factory is yet running in India; the announcements are studies and joint ventures at various stages. The supporting processes — wet spinning, thermal stabilisation, coagulation — remain emerging, even as acrylonitrile monomer is domestically produced and carbonisation furnaces, including Silcarb's equipment lines, are demonstrated.

Closing it means converting NAL's proven pilot chemistry into continuous industrial-scale precursor lines — the step the current investments are built to attempt. Demand is climbing fast: India is the world's fastest-growing PAN fibre market at 5.8% CAGR.