Performance evaluation of cutting fluids additives developed from recycling of polyethylene terephthalate

Metalworking-fluids (MWFs) perform essential functions to metal-products manufacturing industry. MWFs also have inherent environmental and health liabilities associated to industry. These liabilities viewed as opportunity to reevaluate the functionality of MWFs and improve profitability of operations. Several problems appeared in using of MWFs including biodegradation of constituents. The objective of this study is to solve such problems by preparing additives for MWFs from recycling of polyethylene terephthalate polymer. This solves two critical problems which are: disposal of PET polymer, and decrease the bacterial degradation of MWFs. That improves stability of MWFs against biodegradation and increases the economic impact of MWFs.