Preparation and characterization of PLA spunbonded nonwoven material

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