I-MDF yaziwa ngokuthi i-Medium Density Fiberboard, ebizwa nangokuthi i-fiberboard.I-MDF iyifayibha yokhuni noma enye imicu yezitshalo njengempahla eluhlaza, ngokusebenzisa imishini yefayibha, ifaka ama-synthetic resins, ezimweni zokushisa nengcindezi, ezicindezelwe ebhodini.Ngokusho kokuqina kwayo kungahlukaniswa nge-high density fiberboard, i-medium density fiberboard kanye ne-low density fiberboard.Ukuminyana kwe-MDF fiberboard kusuka ku-650Kg/m³ – 800Kg/m³ .Inezici ezinhle, ezifana, ukumelana ne-asidi ne-alkali, ukumelana nokushisa, ukwenziwa lula, i-anti-static, ukuhlanza okulula, okuhlala isikhathi eside futhi akukho mphumela wesizini.