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ifriction.com comments: Cashew resins are made from Cashew Nut Shell Liquid (CNSL) CNSL is a natural resin found in the honeycomb structure of the cashew nutshell. Cashew nut shell oil is a substitute phenol. Compatibility with simple and other substitute phenols is excellent. Less flexible than other oil modified resins. Popular in all kinds of friction materials. Cashew tends to be less brittle than straight phenolics. Use of them, or cashew modified phenolics, imparts some resilience to the finished product. Can improve effectiveness. Helps to make a quieter brake. CNSL resins shrink more than pf resins. No cure is known. |