6641 Polyester film/polyester non-woven flexible laminate (I-Class F DMD) liphepha elineentambo ezintathu eziguquguqukayo zokugquma lenziwe ngefilimu yepolyester ephezulu yokunyibilika kunye nelaphu le-polyester elihotyo elingalukwanga. Icala ngalinye lefilimu ye-polyester (M) ibotshwe ngumaleko omnye we-polyester engalukiweyo ilaphu (D) kunye ne-Class F enamathelayo. Iklasi ye-thermal yiklasi ye-F, ikwabizwa ngokuba yi-6641 F iklasi ye-DMD okanye i-Class F DMD yokufakela iphepha.