Utility Value of Solubilized Animal Hair in Commutative Recycling of Damaged Hides and Skins

Abstract

Hides with defects lose value and are often discarded thereby constituting economic waste. Seemingly damaged skins were obtained from the abattoir. Using mechanical, enzymatic and chemical hair removal processes, three hide samples were prepared and subsequently powdered to fine particle size. Keratin obtained from the unhairing process through alkali hydrolysis of the hair was used in varied quantities in combination with synthetic (Methylourea formaldehyde resin) and natural tanning materials as  binders, were used to form sheaths of 5mm thickness; shrinkage, tensile, percentage elongation tests and degree of water absorption were carried out on the sheaths. Statistical analysis of the results substantiated the results obtained and places this product in good stead as a substitute for top surface covering in rigid structural applications, where low degree of water imbibition, good tensile strength, abrasion resistance and good flame retardancy maybe desired. Correlation analysis of results clearly shows the impact and extent of the addition of solubilised keratin on the properties of recycled skins.

Keywords: Animal hair, beam house waste, unhairing, solubilises, syntan, commutative recycling.