Study on Effect of Drying Techniques on Area Yield and Quality of Leather
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Date
2018-06
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Publisher
AAU
Abstract
Drying is an important process in leather making in which tanning agents, dyestuffs and fat-
liquoring agents combine with collagen further and water is evaporated to fulfill the demands of
final leather product, therefore drying is one of mechanical operation which has signif icant
effect on leather chemical and physical properties. Using different techniques of drying in the
processing of Garment leather affect the change in the area yield of the leathers as distinct from
each other’s. The area yield has great significance for the commerce since the price of piece of
finished garment leather is sold based on its area yield. In this research, the effects of normal,
toggle and vacuum drying techniques on the area yield of garment leather and the quality of the
garment leather dried under each techniques of drying characterized based on moisture content,
softness, tensile strength and elongation at break, subjective property and Scanning Electron
Microscope (SEM) analysis was studied. Moisture content, softness and tensile and elongation at
break of leather steadily decrease with increase in drying period and area yield. More porous
and less adhesion of fibre is obtained by toggle drying techniques and some grain surface
damages observed in vacuum drying techniques from microscopic images. Toggle drying
techniques for drying of garment leather is preferable drying techniques because of the better
area yield of 14.5% with good tensile strength and more porous leather.
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Keywords
Drying techniques, Area yield, Garment leather, Softness