Lineær carbonholdig fiber med forbedret strækbarhed

摘要

A process for preparing a non-flammable linear non-graphitic carbonaceous polymeric fiber, yarn or tow having improved elongability containing the step of heat treating a linear stabilized polymeric fiber, yarn or tow having an LOI greater than 40 without any substantial tension or stress in an inert non-oxidizing atmosphere at a temperature so as to irreversibly heat set said fiber yarn or tow.