The dielectric strength of IDL FRP composites is decreasing with fiber content. Hence, the designer will get an opportunity in selecting lightweight material having reasonable amount of insulation at various fiber volume fractions (Fig. 8.17).

The peculiar behavior exhibited by vakka fiber reinforced polyester composites intro­duced by K. M. M. Rao is noticeable (Ratna Prasad and Mohana Rao 2011). Hence, this kind of materials may be used for the purpose of insulation in electrical appliances.

8.2 Conclusions

Pure splitting method is successfully used to extract the IDL fibers. The tensile strength of chemically treated IDL FRP composites is higher than IDL FRP com­posites whereas modulus of IDL FRP composites is more than treated fiber compos­ites at maximum fiber volume fraction. The tensile modulus of IDL FRP composites at 16.56 % fiber volume fraction is 1,097.53 MPa which is more when compared with untreated and IDL CT fiber reinforced polyester composites at all the volume fractions of the fiber.

The treated IDL FRP composites under flexural loading resulted in good performance than untreated IDL FRP composites. IDL FRP composites have shown reasonably good impact resistance at all fiber volume fractions. The reasonable dielectric strength at various fiber contents invites the designer to select lightweight insulating material.