Résumé : |
Chamois leather is a popular leather article in the market, as it has unique uses for filtration, cleaning and drying. It can be produced by a chamois tannint process using rubber seed oil. Optimum condition for the tanning needs to be applied in order to obtain good quality leather and to produce the leather efficiently. In this research, optimizations of rubber seed oil offer and oxidation time in chamois tanning were investigated. The objectives of the research were to determine the optimum condition of rubber seed oil offer and oxidation time for tanning process. The experiment was conducted by tanning of goat pickle pelt using 10, 20, and 30 % of rubber seed oil for 5, 7, and 9 days of oxidation times. The chemical, physical, and organoleptic properties of the oil tanned leather were measured. This study shows that the chemical, physical, and organoleptic properties of rubber seed oil tanned leather fulfilled the quality requirements for the chamois leather. The optimum conditions for the tanning were an oil offer of 20 % and oxidation time of 9 days. The chemical properties of the leathers were pH of 8, ash content of 1.1 %, and oil content of 6 %. Their physical properties were thickness of 0.8 mm, tensile strength of 21. 3 N/mm2, elongation at break of 148 %, tear strength of 90 N/mm, and water absorption of 271 % (hours). The organoleptic properties of the leathers, i.e. softness, color, and odor, were considered good to excellent. |