Carbon fiber prepreg 307 series

aramid fiberepoxy resin

The low exotherm properties of 307 make it an ideal product for UAV spars, marine masts, wind blade spar-caps, and other applications where very thick parts are required. It is well suited for low pressure, vacuum bag molding techniques. 307 can be supplied with most commercially available fibers (carbon, quartz, aramid, S-glass, E-glass, etc.) in both woven form (designated as NB) as well as unidirectional tape (designated as NCT). Woven fabrics are available in standard commercial widths up to 60 inches (1.5 m). Unitape widths up to 39 inches (1 m) are available in standard fiber weights ranging from 70-300 gsm (0.014-0.060 psf). Recommended processing conditions 307 is typically cured at 250-300°F (121-149°C) depending on part size and complexity. Low, medium and high pressure molding techniques may be used for curing. Recommended cure cycle is 50 psi (345 kPa); 3°F (1.7°C)/min ramp to 275°F (135°C); hold for 90-120 minutes, cool to <140°F (60°C).