Shirkadaha wax soo saarka PVC ee heerka weyn ee kalsiyum carbide ee gudaha ayaa si xooggan u horumariya istaraatiijiyadda horumarinta dhaqaalaha wareegsan, waxay ballaariyaan oo xoojiyaan silsiladda warshadaha iyadoo la adeegsanayo kaalshiyamka carbide PVC oo ah xudunta, waxayna ku dadaalaan inay dhisaan koox warshadeed oo baaxad weyn oo isku daraysa "dhaxalka-korontada-cusbada". Waqtigan xaadirka ah, ilaha alaabada vinyl-ka vinyl ee Shiinaha ayaa ku soo koraya jiho kala duwan, taas oo sidoo kale furtay waddo cusub oo loogu talagalay soo iibsiga agabka ceeriin ee warshadaha PVC. Dhuxusha gudaha-ilaa-olefins, methanol-ilaa-olefins, ethane-ilaa-ethylene iyo habab kale oo casri ah ayaa ka dhigay sahayda ethylene mid aad u badan.
