TORAYCA T800S is an intermediate-modulus carbon fibre for structural composite reinforcement. The fibre is incorporated into a selected resin and layup system, with its mechanical properties distinguished from those of the finished composite laminate.
TORAYCA T800S is an intermediate-modulus carbon fibre supplied by Toray, a continuous structural reinforcement for composite materials in weight-critical aircraft and other high-performance parts. The datasheet describes it as a never-twisted fibre, with a 24,000 filament count, a size type 10E (0.5 percent) and a surface treatment for compatibility with epoxy resin systems.
The fibre is delivered on bobbins and is not a finished laminate. Its properties describe the dry fibre and are separate from the properties of a composite made with it. Tensile strength is 5880 MPa and tensile modulus is 294 GPa, with an elongation of 2.0 percent, measured by the maker's test methods. For a designer, the combination of high strength with an intermediate modulus gives a fibre that can carry high tensile loads. The density is 1.80 g/cm3, which sets the mass of a part for a given fibre volume. The yield of a 24,000 filament tow is 1030 g per 1000 m, and the filament diameter is 5 micrometres.
The datasheet also lists functional properties: specific heat 0.177 cal/g degC, electrical resistivity 1.3 x 10-3 ohm cm, thermal conductivity 0.027 cal/cm s degC, a coefficient of thermal expansion of -0.4 x 10-6 per degC and a cross-sectional area of 0.58 mm2 for the 24,000 filament tow. The negative expansion coefficient is typical of carbon fibre along its axis and is used to design laminates with low thermal distortion.
Composite values in the datasheet were measured with a 180 degC epoxy system, Toray 3631, at room temperature and normalised to 60 percent fibre volume: tensile strength 2950 MPa, tensile modulus 154 GPa and compressive strength 291 MPa. They are typical values and the maker asks designers to consult it for design purposes.
For handling, the fibre is packed in bobbins of 4.0 or 6.0 kg net, in cases of 24 kg, protected against dust. Shelf life is 24 months from the month of manufacture when stored under ambient conditions. The fibre is processed by prepregging, filament winding, weaving or other routes with epoxy resin systems, in aircraft structures, UAV airframes, rotor and propeller parts, pressure vessels and sports equipment.
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