Thaum lub khob yog cov khoom siv tseem ceeb hauv lub raj mis hauv xyoo pua dhau los, txij li xyoo 1980s, PET tau nyiam los ntawm cov tuam txhab thiab cov neeg siv khoom.Cov fwj "polyester" no muaj qhov tshwj xeeb zoo ntawm kev sib sib zog nqus thiab zoo li tsis tawg.Txawm li cas los xij, kev vam meej coj nrog nws n ...