Pyron Brochure
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Pyron® is a registered tradename for oxidized polyacrylonitrile fibers produced by Zoltek. PAN fiber is processed through a high temperature oven to stabilize its molecular structure. Zoltek has produced our oxidized Pyron® technical fibers for over 20 years, allowing us to fine tune our process and become the largest oxidized PAN fiber producer in the world. Pyron® is inherently flame resistant, making it an effective heat-blocking and fire barrier material. SIDE BY SIDE COMPARISON In a comparison test, after 30 seconds in a 1250°C flame, the Pyron® product retains its appearance, hand and...

PRODUCT FORMS CONTINUOUS TOW Pyron® continuous tow fibers are oxidized/stabilized PAN fibers which exhibit excellent resistance to chemicals and solvents and are electrically nonconductive. Pyron® continuous tow is suitable for stretch breaking into yarn, cutting into flock, crimping & cutting into staple fibers for nonwovens or yarn spinning. MATERIAL PROPERTY Density STANDARD DENSITY HIGH DENSITY Tensile Strength Filament Count STRETCH-BROKEN YARNS Pyron® stretch-broken yarns are oxidized/stabilized PAN fibers (OPAN). Yarns produced with Pyron® are knitted or woven into fabrics used in...

Pyron® fabrics are created from Pyron® yarn and have a high LOI value, good strength properties, an ability to be laminated with adhesives and are suitable for cut and sew applications. PLAIN WEAVE - PW03 Areal Weight Roll Length Yarn Input Plain Weave Areal Weight Roll Length Yarn Input Construction Single Knit Tubular Pyron® Felts are produced from Pyron® oxidized PAN fibers. They act as superior thermal, fire, and spark barriers, and can be blended with other strengthening fibers, such as aramids. They are often used for thermal/acoustical insulation in aerospace, as a fireresistant...

AIRCRAFT BRAKES Zoltek’s Pyron fiber is the key component in the production of carbon aircraft brakes. Pyron® fiber is processed in conventional textile equipment and converted into carbon brakes through various manufacturing operations. In comparison to steel brakes, Pyron® based carbon brakes offer twice as many landings per overhaul, similar life-cycle costs, significant weight savings, higher energy absorption capability and the ability to handle up to 2000°F during landings. ® FIREBLOCKING LAYER FABRIC Zoltek’s Pyron® fiber is the key component in nonwoven fireblocking layer fabrics...

SALES OFFICES 3101 McKelvey Road Bridgeton, MO 63044 T: 1-314-291-5110 F: 1-314-291-8536 E: sales@zoltek.com 11 Research Park St. Charles, MO 63304 Zoltek Europe St. Peters, Missouri 27 Guenther Blvd St. Peters, MO 63376 H-2537 Nyergesujfalu Hungary T: 36-33-536-021 E: europe-sales@zoltek.com Abilene, Texas Zoltek China E: china-sales@zoltek.com Zoltek India ABOUT ZOLTEK Zoltek is on a mission to lead the commercialization of carbon fiber and to drive new energy forward through advanced technology and expanded capacity. As the world’s largest producer of oxidized and stabilized PAN fibers,...