Strikes at mills in Ulsan, Korea, could cause a shortage of synthetic fibre. Spandex and acrylic users are already facing problems, reported Express India.. According to trade reports, the strike started at the Hyosung Corporation in late May and has since spread to other synthetic fibre mills such as Taekwang Industrial Co, Daehan Synthetic Fibre Co and Kohap. The Taekwang plant stopped all production on June 12.