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Natural-fiber-reinforced composites are progressively attracting interest in the aerospace, automotive, aeronautics, and marine sectors due to their good strength-to-weight ratios, long lifetimes and cost-effectiveness. Traditional machining methods have trouble machining such composite materials. However, abrasive water jet machining (AWJM) provides an alternative quality machining method that can be accomplished by regulating various process variables. The efficiency of the AWJM method has been the subject of extensive study, due to its negligible heat-affected zone. This review attempts to focus on an exploration of the thermal and mechanical properties and the AWJM efficiency of various coir-fiber-based composites in relation to various parameters and to determine the best AWJM operating conditions. There are numerous process variables that influence AWJM machined surface quality. However, the standoff distance, hydraulic pressure, abrasive mass flow rate, nozzle diameter, and transverse speed are all important factors to consider. Kerf taper, kerf width, and surface roughness are considered key response factors.

One of the biggest challenges in wire insulation industries is the proper governance of its raw materials to form the standardized product. The use of plasticizers has been well investigated and their utilization is very abundant. The ratio of CaCO3, CPW and DOP plays a very important role in determination of the tensile strength of PVC insulation. This paper focuses on the effect of CaCO3, CPW and DOP on the tensile strength of the PVC compounding having PVC resin at hold value of 45%. Unlike other papers this paper enumerates the effect of several components of the mixture simultaneously. The CaCO3 content ranges from 23.50-29.82 %, CPW ranges 8.7-13.04 % and DOP 10.0-15.04 % by weight. The optimum results for Ultimate Tensile Strength came out with 23.52% CaCO3, 13.0% CPW and 14.75% DOP.