IJE TRANSACTIONS B: Applications Vol. 15, No. 2 (July 2002) 205-212   

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E. Ekhtiyari

Department of Textile Engineering, Yazd University
Yazd, 89195-741, Iran, eekhtiyari@yazduni.ac.ir

M. Johari

Department of Textile Engineering, Amirkabir University of Technology
Tehran, 15914, Iran, mjohari@aut.ac.ir

M. Abedi

Department of Electrical Engineering, Amirkabir University of Technology
Tehran, 15914, Iran, mabedi@aut.ac.ir

( Received: January 25, 2001 – Accepted in Revised Form: December 31, 2001 )

Abstract    Among different types of controlling systems, the ON/OFF digital relative humidity control was used for measuring electrical properties of cashmere fibers to make the ambient relative humidity fixed. To achieve this goal the required hardware and software were designed and fabricated. The electrical resistance of fine and coarse hair cashmere fiber was measured by charge and discharge condenser method using Rothschild static voltmeter type R-4021 made in Germany. Experimental results show that the electrical resistance of the fine under coat fibers is considerably greater than that of the coarse under coat fibers. The difference depends on the breeds. With increasing relative humidity, difference of electrical resistance of fine under coat and coarse outer coat cashmere fiber is decreased.  


Keywords    Cashmere, Relative Humidity, Dehairing, Control ON/OFF, Electrical Resistance



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