Hamid Reza Ansari-Renani; Hamid Reza Baghershah
Volume 14, Issue 1 , September 2012, , Pages 41-47
Abstract
Forty sheep skins were allocated into two groups. Group one was sheared using shearing machine and group two was chemically dewooled using 15 percent sodium sulfide. Results indicated that fibre diameter of slipewool (39.3 ± 2.3 µm) was significantly (P< 0.05) higher than the sheared ...
Read More
Forty sheep skins were allocated into two groups. Group one was sheared using shearing machine and group two was chemically dewooled using 15 percent sodium sulfide. Results indicated that fibre diameter of slipewool (39.3 ± 2.3 µm) was significantly (P< 0.05) higher than the sheared wool fibers (36.3 ± 0.7 µm), but staple length of slipewool (3.3 ± 0.7 cm) was significantly (P< 0.05) lower than the sheared wool fibers (5.3 ± 0.2 cm). Percentage of relative length increase in yarns of slipewool was significantly (P< 0.05) higher than the sheared wool fibers. Staple strength of yarns made from slipewool was 1.7 gf/t which was considerably different from yarns made of sheared wool (2.1 gf/t). Percentage of color absorption, washing color fastness, light color fastness of yarns made of slipewool was considerably different from similar value of sheared wool. Thickness of carpets under dynamic and static force of the yarn made from slipewool (88.00 and 88.40 unit) was different from that of yarn made from sheared wool (93.09 and 91.46 unit). Use of slipewool in hand-woven carpet should be avoided due to decrease in yarn strength, color fastness and increased in color absorption. Other methods of skin dewooling should be considered.
Hamid Reza Ansari Ranani; Hamir Reza Baghershah
Volume 13, Issue 1 , September 2011, , Pages 1-6
Abstract
This study was conducted to determine the effect of chemical methods for dewooling from skin on Moghani sheep skin and wool quality. Two treatments of sodium hydroxide (three and five percent) and two treatments of sodium sulfide (10 and 15 percent) rub to 100 skin and time spent to collect wool from ...
Read More
This study was conducted to determine the effect of chemical methods for dewooling from skin on Moghani sheep skin and wool quality. Two treatments of sodium hydroxide (three and five percent) and two treatments of sodium sulfide (10 and 15 percent) rub to 100 skin and time spent to collect wool from skin surface, fibers staple length and diameter recorded. Dewooled skins at thin-cross stage were evaluated by three leather experts for hair follicle, shape, elasticity, flesh, softness, water absorbability, fineness, wrinkleless, thickness and footage loss. Results indicated that the time spent to collect wool from sodium sulfide treated skins was significantly (P< 0.05) lower than sodium hydroxide treated skins. Lowest and highest time for dewooling was (80.3 ± 4.1 minutes) and (180.3 ± 5.3 minutes) for skins treated with 15% sodium sulfide and three percent sodium hydroxide respectively. Quality score for skin treated with 10 and 15% sodium sulfide and three and five percent sodium hydroxide were 30.2 (± 0.1), 31.2 (± 0.5), 37 (± 0.5) and 35.8 (± 1.0), respectively. In general, skins treated with sodium hydroxide have better quality than skins treated with sodium sulfide.