Utilization of Bromelin Enzyme Extracts in Leather and Pineapple Tube (Ananas comosus L. Merr) As A Latex

Abstract

Clotting is a phase change event of a sol to a gel phase with the help of a coagulant commonly called coagulant. The purpose of this research is to produce coagulant that accelerate latex cogulation using natural ingredients skin and pineapple cobs and produce latex with good quality. This study was done by weighing 750 grams of pineapple skin and pineapple, cut into small pieces, washed with aquades, added 0.1 M sodium acetate, mashed and then filtered. Then the extract obtained in the vortex and then centrifuged for 25 minutes at a speed of 3,500 rpm and stored at a temperature of 4 ËšC. Furthermore, the latex coagulation process, latex that has been clot dry and weight of rubber weighed. The largest weight of rubber is the addition of 25 ml of coagulant which produces 27,41 gram of dry rubber and at variable of contact time of heavy weight of rubber is found at 6 hours contact time with rubber weight equal to 25,94 gram. The largest weight of rubber is the addition of 25 ml of coagulant which produces 27,41 gram of dry rubber and at variable of contact time of heavy weight of rubber is highest at contact time 6 hours with rubber weight equal to 25,94 gram. The result of rubber quality testing on coagulant volume variation obtained the best rubber obtained at the time of addition of 25 ml of latex coagulant. The results of the analysis on nitrogen content, dirt content and ash content in the addition of 25 ml coagulant is close to the requirements of SIR 20. As for the results of rubber quality testing on the variation of the best rubber contact time is obtained at the time of contact time 18 hours. The results of the analysis on nitrogen content, dirt level and ash content at 25 ml of this coagulant maturation close to the requirement of SIR 20.