Prices for oil‑derived man-bade fibers have risen more than 10 percent since the US-Iran conflict began, with suppliers in China facing pricing pressure as costs rise but downstream demand remains uncertain.

By mid‑April Chinese polyester staple fiber (PSF) prices averaged just above 8,100 yuan per ton but are fluctuating downward in April after spiking to 8,340 yuan per ton at the end of March, indicating some softening at the margin despite elevated crude.