PBO stands for Polybenzobisoxazole, a synthetic polymer invented by SRI International and is currently manufactured by Toyobo Corporation in Japan. The trademark name for PBO is Zylon. Zylon is 1.6 times stronger than Kevlar and can also withstand higher temperatures.
After being extruded, the profile falls into rollers that convey it further down the line. The first rollers have to hold the most amount of heat, so we use PBO.
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