Study On Residual Oil Viscosity And With Temperature And Humidity Change Of Variable Cashmere

Cashmere grows in epidermis layer of goat appearance, is the pile buried in the goathair root. It is a rare and special animal fiber. At the home and abroad textile production, thecontent and viscosity of Cashmere fiber grease is an important parameter in the processing.This paper studies on residual oil viscosity and with temperature and humidity change ofvariable Cashmere. The Cashmere fiber oil is complex chemical material that origins in goatsebaceous gland and oil gland. The content and viscosity of fiber oil impacts on the carding,combing and spinning processing. Due to environmental and rearing conditions, genetic andother factors, the cashmere physicochemical properties, the oil content and viscosity vary.The subject tests the oil content of cashmere fiber and found obvious differencesbetween various areas. The oil rate in2#,22#,31#,42#and43#cashmere is lower, at2%to5%; the oil rate in27#,38#,39#,40#,44#cashmere grease containing rate is higher, at5%to8%; the oil containing in different levels of cashmere fiber is also different. The oilcontent in first class and second class cashmere fiber has much difference. The oil rate infirst class cashmere fiber36#is8.5%, the oil rate in second class cashmere37#is4.43%.The adhering oil dot of various cashmere fibers is tested and different. The resultshows that the average oil dot in43#is most, it is10.53;27#is least, it is4.69. And theadhering oil dot in different goats is various. The oil dot of ram is most, the wether takessecond place and the ewe is least; the oil containing in different levels of cashmere fiber isalso different, the first class cashmere fiber is more and the second class cashmere fiber isless.The friction properties of cashmere fiber are tested by windlass. The friction ofcashmere fiber is contacted with the oil content and viscosity. The temperature goes up, theoil viscosity vary. So the friction coefficient changes with the oil viscosity Varian. In thesame conditions of temperature and humidity, the cashmere fiber friction coefficient issignificantly greater than the washed cashmere fiber. Thus the adhering oil content is more,the friction coefficient is larger. In the same temperature and humidity conditions, the finepile containing in cashmere fiber changes a little and their test value are relatively stable; thecoarse cashmere fibers of the friction coefficient vary greatly, the friction coefficientbetween each fiber is obviously different. This is mainly decided to the coarse wool fibersurface structure. The coarse wool fiber surface structure is different in each fiber, whichextremely affects the coarse fiber friction coefficient. That resulted in the friction coefficient variant of coarse fiber and type two fiber is not evident in the same temperature andhumidity conditions.This paper also made a variant of cashmere differential scanning calorimetry test andthe DSC curves are different. The cashmere fiber oil content had a direct impact on thecashmere fiber starting endothermic temperature value, the endothermic peak temperatureand the enthalpy value. The cashmere fiber start to endothermic at58.02℃and has theendothermic peak at102.06℃.Its endothermic value is34.53J/g. The washed cashmere fiberstart to endothermic at58.24℃and has endothermic peak at107.48℃.Its endothermic valueis41.73J/g.The Cashmere fiber and washed cashmere fiber have no obvious endothermicexothermic phenomenon, no endothermic peak temperature and enthalpy value at100℃.The chemical properties of cashmere fiber do not change in this temperature range; whilethey were followed by melting phenomenon at200℃. They incorporate in appearing intenseendothermic phenomena.