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RISS 인기검색어
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- 저자 : Kaifang Xie (검색결과 2 건)
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Analysis on Property Discrepancy between Core and Sheath Fibers in Braided Harness Cords
Kaifang Xie,Ziyun Zhang,Hua Shen,Guangbiao Xu 한국섬유공학회 2019 Fibers and polymers Vol.20 No.6
Harness cord is widely used in the industries of trademark, carpet, home textile and towel, which is the mostimportant lifting part in the jacquard loom. In this article, the tensile properties and crystallization performance of core andsheath fibers in harness cords were measured separately. The influence of heat setting during the finishing process on thefibers’ properties was studied. The results showed that the tensile strength, elongation at break and specific work of corefibers were higher than that of sheath fibers. This was because the crystallinity and preferred orientation of fibers werechanged by the heat and applied tension during the heat setting process. The core fibers showed better crystallinity, preferredorientation and crystallite size than that of sheath fibers. Besides, the tensile properties and crystallization performance offibers before and after heat setting was compared. It revealed that the heat setting enhanced the tensile properties andcrystallization performance of core fibers, while the opposite phenomenon was observed in sheath fibers.
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A Novel Interlaced-helical Wrapping Yarn with Negative Poisson’s Ratio
Sai Liu,Zhaoqun Du,Kaifang Xie,Gui Liu,Shu Yang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.11
The two-component complex yarn with helical wrapping structure has been reported with auxetic behavior and unique performance, however, the residual torque could lead to the slippage of the wrap component from the core in the natural state and poor stability and applicability. Therefore, this paper aims to introduce a novel interlaced-helical wrapping yarn with negative Poisson’s ratio, stable structure, practicability and continuous preparation. The differences in geometry and auxetic behavior between helical structure and interlaced-helical structure were presented and analyzed. Both the structure stability and auxetic effect of the interlaced-helical complex yarn have advantages over the helical wrap yarn with same materials and initial wrap angle. It can be shown that the interlaced-helical wrap yarns with lower initial wrap angle and bigger tensile modulus of the stiff yarns will produce better auxetic effect. Besides, the deformation mechanism and the manufacturing process were described in detail. Several kinds of yarns have been fabricated to discuss the effect of initial wrap angle and tensile modulus on the Poisson’s ratio of the structure. The maximum value of Poisson’s ratio for the yarns manufactured was -2.8. It is also expected that auxetic yarns with novel braided structure can prompt the applications of auxetic textiles.
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