Effects of hybrid process on mechanical properties of coir-hemp/polypropylene composites

The influence of the hybrid process and the composite process on the mechanical properties of hybrid coir-hemp/polypropylene (PP) composites was discussed by orthogonal analysis. The results show that the mechanical properties of hybrid coir-hemp/PP composites after hybrid treatment are greatly improved compared with that of hemp/PP composites under the same composite conditions. The mass ratio between coir fiber and hemp fiber has the greatest influence on the mechanical properties of hybrid coir-hemp/PP composites, and the mechanical properties of the hybrid coir-hemp/PP composites increase linearly with the increase of the coir fiber content; the mass fraction of PP fiber in reinforced needle-punched felt has great influence on the flexural strength of the hybrid coir-hemp/PP composites. The bending strength of the hybrid coir-hemp/PP composites decreases with the increase of the PP fiber content on the initial, and then increases with the increase of PP fiber content, while the tensile strength of the hybrid coir-hemp/PP composites decreases linearly with the increases of PP fiber. The mechanical properties of the hybrid coir-hemp/PP composites decrease with the increase of the composite lamination temperature.