scholarly journals Mechanism of Spun-Yarn Structure Formation

1983 ◽  
Vol 36 (2) ◽  
pp. T30-T37
Author(s):  
Kazuhisa Harakawa ◽  
Fumiko Ando
Keyword(s):  
Structure Formation ◽  
Spun Yarn ◽  
Yarn Structure

scholarly journals Wicking Behaviors of Ring and Compact-Siro Ring Spun Yarns with Different Twists

2019 ◽  
Vol 19 (1) ◽  
pp. 68-73 ◽  
Author(s):  
Yuzheng Lu ◽  
Yang Wang ◽  
Weidong Gao
Keyword(s):  
Efficient Method ◽  
Capillary Rise ◽  
Fiber Material ◽  
Staple Fiber ◽  
Yarn Strength ◽  
Capillary Rise Method ◽  
Spun Yarn ◽  
Spun Yarns ◽  
Twist Level ◽  
Yarn Structure

Abstract In this study, the wicking properties of ring and compact-siro ring spun staple yarns were compared. The twist level, which is related to the structure of the staple yarns, was found to significantly influence the wicking property of the two kinds of yarn. Polyester staple fibers with 1.33 dtex × 38 mm were selected as the staple fiber material, and the effect of the twist level on the wicking property was investigated using the capillary rise method. The results show that with a decreasing twist coefficient, the wicking height increases with a decrease in yarn compactness. The compact-siro spun yarn showed better wicking properties owing to it special ply yarn structure. Furthermore, the tension property of the yarns decreased significantly with a decrease in the twist coefficient. Compact-siro spinning was carried out to obtain staple yarns with lower twist coefficients, and the yarns showed great improvement in terms of yarn strength, fiber straightness, and wicking properties. Thus, compact-siro spinning is an efficient method to improve the wicking properties of staple yarns.

scholarly journals Thermal Behavior of Worsted Fabrics Produced from Different Yarn Spinning Systems

2013 ◽  
Vol 8 (3) ◽  
pp. 155892501300800 ◽  
Author(s):  
Abolfazl Mirdehghan ◽  
Siamak Saharkhiz ◽  
Hooshang Nosraty
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermal Behavior ◽  
Thermal Insulation ◽  
Weft Yarn ◽  
Spun Yarn ◽  
Finishing Process ◽  
Yarn Structure ◽  
Fabric Structures ◽  
The Impact

This paper describes an experimental study of the impact of yarn structure on the thermal properties of worsted fabric. In this study, four different spun yarn structures (Solo, Siro, and single ply and two ply Ring) were woven into four fabric structures (Plain, Twill2/1, Twill2/2 and Basket2/2) and their thermal properties were studied. In addition, the thermal behavior of finished and unfinished samples was also evaluated. Results showed that the finishing process causes an increase in thermal conductivity and warmth to weight factor and a decrease in thermal insulation. Different spinning systems, also affect the thermal properties of the worsted fabrics. Samples with Siro yarns in the weft were found to have the highest thermal conductivity and those made from single ply weft yarn the lowest thermal conductivity. A relation between fabric thermal insulation and air permeability and thickness was also found.

All-carbon cord-yarn supercapacitor

2017 ◽  
Vol 48 (5) ◽  
pp. 875-883 ◽  
Author(s):  
Yuxiang Huang ◽  
Jonathan Y Chen
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Activated Carbon Fiber ◽  
Electrical Impedance Spectroscopy ◽  
Cord Yarn ◽  
Spun Yarn ◽  
Yarn Structure ◽  
Plied Yarn ◽  
Specific Length ◽  
Better Than

Flexible solid-state yarn supercapacitors were fabricated using commercial carbon fiber and activated carbon fiber. Two methods of yarn construction were studied. One was twisting carbon fiber and activated carbon fiber together (plied yarn), and the other was wrapping activated carbon fiber on carbon fiber (wrapped yarn). Electrochemical measurements in terms of cyclic voltammetry (CV), galvanostatic charge/discharge (GC) and electrical impedance spectroscopy (EIS) were conducted. The result revealed that the cord-yarn structure performed better than the core-spun yarn structure, by showing a specific length capacitance of 82 mF cm−1 at 2 mVs−1. It also exhibited a high specific length energy density of 20.4 μW h cm−1 at a power density of 60 μW cm−1. There was little capacitance reduction when the cord-yarn supercapacitor was bent or crumpled, showing an excellent mechanical flexibility.

scholarly journals Analysis of Spun Yarn Structure of Crimped Fiber Assemblies

1976 ◽  
Vol 22 (3) ◽  
pp. 62-66 ◽  
Author(s):  
Shinji Yamaguchi ◽  
Sueo Kawabata
Keyword(s):  
Spun Yarn ◽  
Yarn Structure

scholarly journals Research on the Compact-Siro Spun Yarn Structure

2015 ◽  
Vol 23 (3(111)) ◽  
pp. 54-57 ◽  
Author(s):  
Xuzhong Su ◽  
Weidong Gao ◽  
Xinjin Liu ◽  
Chunping Xie ◽  
Bojun Xu
Keyword(s):  
Spun Yarn ◽  
Yarn Structure

scholarly journals Investigation of Twist Waves Distribution along Structurally Nonuniform Yarn

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sh. Shukhratov ◽  
R. Milašius ◽  
K. Gafurov ◽  
J. Gafurov
Keyword(s):  
Structure Formation ◽  
Doppler Effect ◽  
Constant Speed ◽  
Axial Deformation ◽  
Yarn Twist ◽  
Yarn Structure ◽  
The Waves ◽  
Vibration Forms

Abstract This paper presents the features of yarn structure formation on spinning machine, i.e. yarn twist change when winding. It was considered that the twist distribution was one of the reasons for its decrease along the formed yarn. In this paper, based on analysis of changes in thickness and twist due to axial deformation, we consider a yarn moving at constant speed. Moving dynamics of yarn are studied here by using Euler variables. The correspondences of forward and reverse twist waves’ distribution speeds on presented frequency at various vibration forms are obtained. The parameters of Doppler effect for the waves distributed along the yarn are determined.

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