A Study on the Mechanical Properties of Alkali Treated Natural Reinforced Fiber Composites

The purpose of the research article is to estimate the outcome of the experimental examination carried out on the properties of Mechanical short fibers with polyester composite. The maximum content and length of the fiber composite is sustained at 20 wt% and 15 cm. The roselle, sisal, and coconut coir fiber content and the length are differed between 5 to 15 wt% and 5 to 15 cm, respectively. But the strength of the tensile and flexural oselle/sisal/coir fiber hybrid polyester composite with 20 wt% and 15 cm are 17.07 MPa and 32.6 MPa respectively. It was low when compared to glass/polyester composite. Upon increasing the fiber content from 10 to 20 wt % and fiber length from 5 to 15 cm, the tensile strength increased from 7.43 to 17.07 MPa, and flexural strength increased from 27.2 to 32.6 GPa. The specimen with 20% fiber content of length 10 cm holds the highest impact strength of 6.21 kJ/m2. The specimen with 20% fiber content of 15 cm fiber length has the highest tensile strength of 19.07 MPa. This shows that these alkali treated fiber reinforced hybrid polyester composites can be employed successfully for better results.