1.0 Research Context The term plastic has attracted increased attention in the literature over the past 100 years since the introduction of the first industrial plastics in the latter part of the 19th century. John Wesley Hyatt, an American, finally found the solution in 1869 with celluloid making its debut in the plastic industry (McCord, 1964). Since then, there have been several milestones in the history of materials science as the invention of plastic has, without a doubt, touched more lives than any other technological breakthrough. Plastic plays a significant role in the environmental, social and economic dimensions of sustainable development. Our modern lifestyle would not be possible without plastic. Plastics have proliferated so easily throughout the modern world due to their inherent properties such as lightness, versatility and durability (Fortelný et. al., 2004). Possessing these advantageous characteristics, plastic has become a good candidate for replacing other materials ranging from simple plastic parts such as household containers, to sophisticated devices such as replacement heart valves. It is this range of properties, together with their low cost, that has driven annual global demand for plastics to reach at least 308 million tonnes by 2010 (Andrady and Neal, 2009).1.1 Impacts of plastic production Although plastics have had Having a notable impact on our culture and lifestyle, the production and use of plastic represents a growing threat to the environment. Most plastic comes from fossil fuels and therefore the production of plastic has an impact on the consumption of oil, both as a raw material and to provide energy for the production process (van der Voet et al, 2003). The procedure... in the center of the paper... is the chapter. The literature review on related topics has been outlined in Chapter 2. The main objectives of this chapter are to present the latest knowledge and studies of other researchers related to the feasibility of carrying out reprocessing operations in the plastics industry, especially in recycling of plastic and in the implementation of the Taguchi method to optimize the processing parameters of injection molding to improve the mechanical properties of recycled plastic products. The following chapter 3 outlines the methodology used in this research where each procedure of the experiments is explained in detail. Chapter 4 analyzes and discusses the results obtained from experiments based on the Taguchi method and analysis of variance (ANOVA). Chapter 5 highlights the conclusion of this research work and concludes with the future continuation of the work.