15w laser upgrade questions

I´m designing a huge láser mounted over a tailor table, t-slot based linear movement and 15w diode laser.
This láser is intended to cut poliester fabric, 0,6mm thickness. My major question is about cut speed, in the comments above Cosmin said he cuts 0,6mm cardboard at 50mm/min with full power, this is too slow for me, I need at least over 50mm/sec. Do you think is possible to achieve this goals?