Technical Datasheet Panex® 35 Prepreg Tapes Medium-to-High Areal Weight Carbon Fiber Prepregs for High-Volume Applications Description Zoltek produces uni-directional (UD) prepreg tapes based on Panex carbon fiber. Zoltek prepreg is ideal for large-volume composite applications where high production throughput, excellent composite properties, and low material cost are important. A wide selection of epoxy resin formulations meets most processing and composite property requirements for tack, toughness, flow in cure, surface finish, curetime, cure temperature, and delivered composite strength and modulus. Custom formulations are also available. Zoltek prepreg properties, such as fiber areal weight (FAW), resin content, and width, are readily adjusted to exactly meet customer requirements. Packaging options include core size, interleaf type (paper and/or poly film) and number (one side or two), and custom labeling. Zoltek prepreg production is geared to large volumes and low cost. Special projects are welcomed. Material Overview Fiber Areal Weight Recommended Use Any article or component benefiting from the unique properties of carbon fiber composites. Excellent for hand lay-up or automated fabrication processes. Applications Wind energy, automotive, petroleum production, aviation, marine, industrial, other transportation, medical (including X-ray), sports and recreation, etc. SI US 150 to 900 g/m2 4.4 to 26.5 oz/yd2 Resin Content 28 to 45 percent (wt/wt) Width* Up to 127 cm Up to 50 in. Length** Up to 1,500 m Up to 4,900 ft. Resin Several epoxy resin formulations are available for processing flexibility and to meet the requirements of diverse applications. Zoltek resins vary in cure, mechanical property translation, elongation, out time, etc. * Production efficiency and pricing may be impacted by tape and width selection ** Maximum roll size is 1,000 lbs net prepreg weight Zoltek Corporation | 3101 McKelvey Rd. | St. Louis, MO 63044 P: 314-291-5110 | F: 314-291-8536 | E: [email protected] | W: www.zoltek.com

Panex® 35 Prepreg Tapes Typical Properties SI US Method Characteristic Values Tensile Strength 1,903 MPa1 276 ksi1 DIN EN ISO 527 1,712 MPa3 Tensile Modulus 134 GPa1 19.4 msi1 DIN EN ISO 527 124 GPa3 Compressive Strength 1,324 MPa 192 ksi DIN EN ISO 14126 1,141 MPa3 Compressive Modulus 129 GPa1 18.7 msi1 DIN EN ISO 14126 121 GPa3 Interlaminer Shear Strength 76 MPa2 11 ksi2 ASTM D 2344 +/-45 In-Plane Shear Strength 59 MPa 8.6 ksi DIN EN ISO 14129 57 GPa3 +/-45 In-Plane Shear Modulus 4.84 GPa 702 ksi DIN EN ISO 14129 4.6 GPa3 122°C2 252°F2 DMA Glass Translation Temperature (Tg,G”) 1 ZR6 resin,...