NBR (nitrile -butadiene rọba) na PVC (Poly Vinyl Chloride) bụ isi ngwakọta ihe na plastic-rubber ụfụfụ ụlọ ọrụ.Ngwakọta NBR/PVC nwere ma PVC njiri nguzogide ozone yana njiri mmanu mmanu nke NBR ma ewezuga arụmọrụ nke crosslinking, gbakwunyere ntakịrị nguzogide ọkụ.Ọ na-ejikwa ezigbo anụ ahụ arụ ọrụ.N'ihi PVC na-emepụta ihe na nke dị ọnụ ala dị ka akụrụngwa, a na-eji ụfụfụ agwakọta dị otú ahụ n'ọtụtụ ebe.