scholarly journals Analysis of Factors to Influence Single Yarn Strength CV Value

2008 ◽  
Vol 2 (6) ◽  
Author(s):  
Dan Shen ◽  
Yi Zhang
Keyword(s):  
Yarn Strength ◽  
Single Yarn

Property Research on Cooling-Mica Fiber and Yarn

2012 ◽  
Vol 503-504 ◽  
pp. 482-485 ◽  
Author(s):  
Bian Xia Liu ◽  
Jia Guang Meng ◽  
Wei Tao Li
Keyword(s):  
Fiber Strength ◽  
Single Fiber ◽  
Yarn Strength ◽  
Single Yarn ◽  
Yarn Hairiness

In this article, morphology, IR and single fiber strength of cooling-mica fiber, and single yarn strength, yarn hairiness, twist, yarn evenness, resisting acid and alkali have been studied and tested.

scholarly journals Production of Fine Count Yarns from Some Extra-long Egyptian Cottons on Different Spinning Systems

2021 ◽  
Vol 3 (5) ◽  
pp. 90-96
Author(s):  
Eman Rashwan El-Sayed ◽  
Eman Yehia Abd-Elkawe
Keyword(s):  
Physical And Mechanical Properties ◽  
Ring Spinning ◽  
Mean Values ◽  
Quality Properties ◽  
Yarn Strength ◽  
Yarn Count ◽  
Single Yarn ◽  
Yarn Hairiness ◽  
Yarn Quality Properties ◽  
Compact Spinning

The current research was carried out to produce fine count yarns from extra-long Egyptian cotton varieties using compact and ring spinning systems.in addition, to compare between compact yarns and ring yarns in terms of their physical and mechanical properties. Three commercial extra-long staple Egyptian cottons Giza92, Giza93 and Giza 96 were used to produce four linear densities of 80, 100, 120 and 140 at 3.6 twist multiplier. Results obtained showed that Giza 92 was surpassed significantly other extra -long staple varieties. It recorded the highest mean values of yarn strength and yarn evenness While, the same variety recorded the lowest mean values of yarn hairiness and imperfections. Compact yarns were much better than yarns spun on the ring spinning in yarn strength, yarn elongation, evenness, yarn imperfections and yarn hairiness. Yarn count 80,s gave higher single yarn strength (20.89cN/tex), yarn elongation (5.03%) and yarn evenness (17.49%) and lower yarn hairiness (2.04) and imperfections than yarn count 140s. Single yarn strength, yarn elongation and yarn evenness were decreased with increasing yarn count. While the number of neps, hairiness, the number of thin and thick places were increased with increasing yarn count. Concerning, the effect of interaction between cotton varieties × yarn counts × spinning systems on yarn quality properties. Yarn count 80s recorded the highest mean values of yarn strength (23.14, 21.1 and 20.2 cN/tex) and yarn evenness (17.72, 16.53 and 16.79%) for varieties Giza92, Giza93 and Giza96, respectively for compact spinning system. Yarn strength at count 80, 100, 120 and 140 correlated negatively and highly significant with micronaire value and maturity ratio.

A method to produce ring single yarn with fancy and anti-frictional structure by feeding filaments in front of the front roller nip

2019 ◽  
Vol 90 (5-6) ◽  
pp. 631-640
Author(s):  
Zhigang Xia ◽  
Hong Shan Wang ◽  
Wenxiang Ye
Keyword(s):  
Tensile Strength ◽  
Experimental Results ◽  
The Novel ◽  
Ring Spinning ◽  
Yarn Strength ◽  
Composite Ring ◽  
Frictional Properties ◽  
Novel Method ◽  
Single Yarn ◽  
Yarn Surface

In this study, a composite ring spinning via feeding filaments in front of the front roller nip method was developed as a novel, effective way to form yarn surface looped fancy wrappings. The novel method was theoretically demonstrated to produce fil-wrap yarn with tight filament wrappings and periodic filament loop decorations on the surface. Tight filament wrappings fasten staple fibers firmly onto the yarn stem to achieve excellent anti-friction, while filament loops decorate the yarn surface to yield a fancy appearance. However, intensive bending of looped and wrapping filaments are likely sheared down to decrease the yarn’s tensile strength. The novel method was combined with corefil spinning to produce a fil-clamp yarn with enhanced structural fastness and strength. Experiments were conducted to validate the approach. Experimental results proved that the novel fil-wrap and fil-clamp yarns had periodic filament looped and tight wrappings, resulting in eliminated hairiness and increased fancy loops after comparison with conventional sirofil and corefil yarns. respectively. The fil-wrap yarn with only surface-bending filament wrappings was weaker, but more friction-resistant than conventional sirofil and corefil yarns. Yarn strength and anti-friction were enhanced after burying straight filaments in the fil-wrap yarn body to form a fil-clamp yarn. The fil-clamp yarn with fancy and anti-frictional structure is expected to endow fabrics with improved fluffiness, softness and anti-frictional properties.

Estimation of yarn strength based on critical slipping length and fiber length distribution

2017 ◽  
Vol 89 (2) ◽  
pp. 182-194 ◽  
Author(s):  
Zhan Jiang ◽  
Chongwen Yu ◽  
Jianping Yang ◽  
Guangting Han ◽  
Mingjie Xing
Keyword(s):  
Fiber Length ◽  
Length Distribution ◽  
Probability Method ◽  
Yarn Strength ◽  
Fiber Length Distribution ◽  
Yarn Twist ◽  
Twist Multiplier ◽  
Strength Based ◽  
Breaking Mechanism ◽  
Yarn Structure

Yarn strength is composed of the total contributions made by all breaking and slipping fibers which are determined by critical slipping length lc. Though the definition of lc has been the focus of many research projects, it still remains unsolved. In this study, idealized assumptions were made on yarn structure, and lc was then estimated. At the same time, the actual contributions that breaking fibers and slipping fibers make to yarn strength were recalculated based on an idealized yarn structure, which was analyzed with the conditional probability method according to fiber length distribution. Then, yarn strength was computed by simulating random fiber arrangement in the yarn. It could be seen from calculated results that the critical slipping length declines as yarn twist multiplier increases. Meanwhile, as the twist multiplier increases, the calculated yarn strength rises to the highest point and then declines, which is in agreement with traditional spinning theory. Thus, the calculation of yarn strength based on critical slipping length could reflect the yarn breaking mechanism with a change in the yarn twist multiplier, and could be applied for further prediction of yarn strength.

scholarly journals Structure of Novel Composite Single Yarn from Polypropylene Staple Fibers

2012 ◽  
Vol 58 (3) ◽  
pp. 27-34 ◽  
Author(s):  
Hirokazu KIMURA ◽  
Masakazu MATSUMOTO ◽  
Yo-ichi MATSUMOTO ◽  
Kazunari FUKUSHIMA
Keyword(s):  
Single Yarn

Nomographs for Estimating Yarn Strength

1954 ◽  
Vol 24 (6) ◽  
pp. 534-534
Author(s):  
Werner Busser
Keyword(s):  
Yarn Strength

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 Effect of a Subjective Grading System and Blending with Polyester on Selected Wool and Yarn Characteristics of Subtropical Egyptian Barki Sheep

2019 ◽  
Vol 27 (5(137)) ◽  
pp. 30-39
Author(s):  
Ahmed Helal ◽  
Rania Agamy ◽  
Aymen A.I. Gad Allah ◽  
Essam M. Al-Betar ◽  
Sabry F. Mahouda ◽  
...  
Keyword(s):  
Grading System ◽  
Yarn Strength

Seven-hundred kilograms of subtropical Barki wool was collected to study the effect of a subjective grading system and blending with polyester on selected wool and yarn characteristics. Wool was graded subjectively into coarse, fine and raw; then each grade was blended with 0%, 15%, 25%, 35% and 45% of polyester. Staple and yarn strengths were higher in both coarse and fine grades compared with raw wool. Staple elongation of the fine grade reached 3 times that of coarse grade and twice as much as raw grade. Also, in the 100% wool blend, yarn elongation of the fine grade was twice as much as both coarse and raw grades. The fine grade had the highest yarn friction, followed by other grades. Generally, adding polyester to coarse and fine grades led to an improved yarn strength compared with the raw grade. Adding 15% polyester caused the highest improvement among other percentages. Correlations among traits were also discussed.

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