The Gold Roller ™ is made from 100% PBO yarn. This is truly a 'high tech' yarn with better heat and abrasion resistance than any other high performance yarn. It also has a soft 'feel' and this makes it even more interesting. PBO (polybenzoxazole) is a high performance fibre developed by Toyobo in Japan and sold under their registered name 'Zylon®'. It has superior tensile strength and modulus to aramid fibres (such as Kevlar®). It also offers excellent performance in such properties as chemical resistance, creep, and cut/abrasion resistance. The tensile strength and impact energy absorption of PBO is more than twice that of aramid yarns.
The particular technical parameter of interest to aluminium extruders is the high temperature resistance of PBO, far exceeding aramid fibres. It has outstanding flame resistance and thermal stability and its decomposition temperature in air is 650ºC. (This is almost 100ºC higher than paraaramid). The maximum contact temperature is in the order of 600ºC.
The unusual toughness of the Gold Roller™ is demonstrated by the fact that normal workshop equipment (including bandsaws) cannot be used to shorten them. Woven PBO is the most resilient technical textile product available to any industrial sector. It is the ideal answer to the hostile conditions in the initial lead out area (hot zone) close to the extrusion press where durability is paramount. Larger presses, in particular will benefit from the outstanding crush resistance of woven PBO.