Browsing by Author "Tamiru, Alemayehu"

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    Studies on Cleaner Leather Process of Ammonia Free Deliming, Bating and Degreasing Simultaneously
    (Addis Ababa University, 2021) Tamiru, Alemayehu; Kanagaraj, J. (PhD)
    The study presents the design of cleaner leather process of ammonia free deliming, bating and degreasing to facilitate the production of leather. Ammonia salt bating and solvent degreasing are well known and adopted globally. Development of green chemicals and short coming of ammonium salts and organic degreasing solvent system of processes calls for a need for the development of cleaner leather process of bating and degreasing. Hence this research work focused on, the development of cleaner leather process of combining bating and degreasing in single bath using commercially available and cheap enzymes as an alternative bating and degreasing process. Bating and degreasing in single bath system gives thin wet white pelts with high thumb impression. Among the selected enzymes and design process evaluated leathers obtained by alkaline bating and degreasing (peltec-BB and peltec-BC-E-F respectively) with in 1hr process were observed to be stronger, better general appearance and good run properties. In contrast acid bating and degreasing after pickling with 1hr process resulted poor organoleptic properties and less run properties. Physical testing and organoleptic properties of the matched pair leathers of the alkaline bating and degreasing system simultaneously were comparable to that of conventional bating and degreasing system of leather process. Most important is that it would not produce ammonia, reduce chemical consumption and produce very clean and wet white pelts, therefore alkaline bating and degreasing enzymatically in single bath good process for the manufacture of glove leather.