Abstract: Abstract The thermal properties of PLA pellets were mainly studied. At the same time, the PLA spunbonded materials were prepared successfully. The influences of drawing on its mechanical properties and filtration efficiency were analyzed to provide the reference for experiment preparation and industrial production. The melting point of pellets was determined by differential scanning calorimetry (DSC). The initial decomposing temperature and maximum decomposing temperature of it were indicated by thermal gravimetry (TG). The results of materials properties testing showed that the area density of PLA sponbunded materials was relatively uniform. With the increasing of drawing, the fiber fineness was increased, both he breaking strength and bursting strength were also increased, while the breaking elongation was a little decreased. And the mean pore and porosity of materials were decreased, so the filter efficiency was improved.

Key words: polylactic acid , spunbonded , non-woven material , property , characterization