I nga tau kua pahure ake nei, ko te whakawhanaketanga o te ahumahi PVC kua uru ki te toenga ngoikore i waenga i te tuku me te tono. Ka taea te wehea te huringa ahumahi PVC o Haina ki nga waahanga e toru. 1.2008-2013 Te wa tipu tere-tere o te kaha whakaputa ahumahi. 2.2014-2016 production kaha withdrawal period2014-2016 production kaha withdrawal wā 3.2017 ki te wā toenga production hakari, toenga ngoikore i waenganui i supply me te tono.
