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Toho Tenax Co., Ltd. announced Nov. 6 that it has developed a new prepreg - a carbon-fiber sheet pre-impregnated with matrix resin - that offers super-high-heat and -oxidation resistance suited to aircraft and automotive engine compartments.
The new bismaleimide resin-impregnated prepreg does not reach glass-transition below 320°C (608°F), the result of Toho Tenax's original resin-formulation technology. Transition temperatures around 200°C (392°F) are typical of other prepegs, according to a company spokesperson. The supplier declined to provide any more details on the resin composition and its development program due to non-disclosure agreements (NDAs).
The new prepeg also maintains oxidation resistance without heat cracks under continuous use in the upper 200°C (lower to mid 500°F) range. This...