Study of Metal Alloy Segregation from Waste of Plastic Lens Curve Grinding Process, using Thermal Method

Abstract

This study was carried out to fffind out the proper conditions of segregating metal alloy from plastic lens curve grinding waste for reuse, by using thermal method. The study design enabled to segregate metal alloy from 10 kilograms of plastic lens curve grinding waste by varying temperature of boiling, 60-75 and time of boiling, 5-15 minutes. After cooling down to room temperature, metal alloy can be segregated from plastic waste. The segregated metal alloy was weighed and calculated for average. Result of the experiment shows difference yield of metal alloy weight from boiling by different boiling temperature and time. At 75 , 15 minutes, average high yield was 37.53 grams per 10 kilograms of plastic waste. The proper condition of segregation metal alloy from plastic lens curve grinding waste were selected from boiling at 75 , 5 minutes with average of segregated metal alloy was 33.83 grams per 10 kilograms of plastic waste. This study results suggested the practical guide for metal alloy segregation and reduction of new use of metal alloy at 39.60 kilograms per month.