Milled olive pits can be used as reinforcements in PLA so that a full
bio-based composite is produced. The flexural strength reduction may
be due to the poor interfacial bonding between olive pit powder and
PLA. From a general point of view this is the main disadvantage encountered
during the incorporation of natural lignocellulosic materials into
polymers. Therefore suggestions to achieve a better interfacial bonding
are reported in literature