A statistical analysis of low-stress mechanical properties of warp-knitted fabrics

2016 ◽  
Vol 88 (4) ◽  
pp. 467-479 ◽  
Author(s):  
Ka-yan Yim ◽  
Chi-wai Kan
Keyword(s):  
Mechanical Properties ◽  
Evaluation System ◽  
Natural Fibers ◽  
Physical Parameters ◽  
Knitted Fabrics ◽  
Fabric Hand ◽  
Low Stress Mechanical Properties ◽  
Fabric Weight ◽  
Fabric Structures ◽  
Selection Of

Fabric hand is an indispensable characteristic for the selection of fabric and product development and the buying consideration for manufacturers and consumers. However, there is little comprehensive work on the hand feel property of warp-knitted fabrics due to the mainstream natural fibers (cotton, wool and silk) and other fabric structures (woven, weft-knitted and nonwoven). The increasing potential for the wide variety of applications and development of warp-knitted fabrics is not only because its fabric hand gives better determination for fabric marketing, but also because it provides extensive scope for fabric performance and appearance. This paper reports an experimental study on the integrated fabric hand behavior of a series of warp-knitted fabrics made for various apparel applications, such as sportswear, lingerie and leisure wear. These 105 fabrics were produced by varying different physical parameters, including fabric weight and fabric thickness. The Kawabata Evaluation System for Fabric (KES-F) was employed to obtain the fabric hand properties (primary hand value and total hand value) related with stiffness, smoothness and softness. All low-stress mechanical properties and fabric hand values from the testing results were used to verify the applicability of the KES-F on warp-knitted fabrics and to analyze the relationships of fabric parameters and hand characteristics. The results indicate that the KES-F is an appropriate tool to measure the hand attributes of warp-knitted samples, and moderate correlations between physical properties and mechanical behavior were found.

Development of Coolsmart Functional Knitted Fabrics

2012 ◽  
Vol 503-504 ◽  
pp. 498-502 ◽  
Author(s):  
Lan Qing Feng ◽  
Yan Jun Liu
Keyword(s):  
Pattern Formation ◽  
Moisture Absorption ◽  
Raw Materials ◽  
Knitted Fabric ◽  
Machine Code ◽  
Knitted Fabrics ◽  
Bacterial Function ◽  
Fabric Structures ◽  
Selection Of

Based on the main features of coolsmart fiber and the theory of knitted fabric structures， two structures of sports and leisure knitted fabrics with fast moisture absorption, description and anti-bacterial function are introduced in this article, detailing the selection of raw materials, pattern formation effect, the machine code organization and cam set out.

scholarly journals Evaluation of Tactile Comfort of Mulberry Silk Waste and Viscose Blended Knitted Fabrics by using Kawabata Evaluation System (KES) for Apparel Use

2019 ◽  
pp. 1-15
Author(s):  
Shikha Bajaj ◽  
Sandeep Bains
Keyword(s):  
Evaluation System ◽  
Objective Assessment ◽  
Tensile Shear ◽  
Knitted Fabrics ◽  
Compression Properties ◽  
Yarn Count ◽  
20 Nm ◽  
Tactile Sensations ◽  
Selection Of ◽  
Shear Bending

Tactile sensations are among the first parameters, which play an important role in guiding a consumer’s decision while selection of fabric. In the present investigation, hand properties of knitted fabrics were studied. Attempt was made on four knitted fabrics, blended in proportions of 50% mulberry silk: 50% viscose and 40% mulberry silk: 60% viscose, each in two unequal counts. Objective assessment of the fabrics has been carried out in order to obtain the scores on various aspects of hand. Parameters like low stress mechanical and surface properties were chosen for experimental design. Blended knitted fabrics were subjected to tests for prediction of tensile, shear, bending, surface and compression properties. The results could bring about the useful data for design and production of ideal fabric having desirable handle. It was witnessed that knitted fabric blended in proportion of 50% mulberry silk: 50% viscose in 20 Nm yarn count carried finest hand properties with total hand value of 3.49; hence same was recommended for apparel use, commercial handling and production.

Evaluating the Influence of Fiber Composition and Structure of Knitting Fabrics on Total Hand Value (THV)

2016 ◽  
Vol 848 ◽  
pp. 211-215
Author(s):  
Nareerut Jariyapunya ◽  
Blažena Musilová ◽  
Marie Koldinská
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Surface Properties ◽  
Evaluation System ◽  
Tensile Shear ◽  
Knitted Fabrics ◽  
Fiber Composition ◽  
Composition And Structure ◽  
Different Types ◽  
Shear Bending

This paper presents analytical and experimental procedures to evaluate the influence of knitted fabrics on the total hand value (THV) for women’s winter thin dress. We examined and compared its mechanical properties, such as tensile, shear, bending, compression, surface roughness and friction properties, measured by the Kawabata Evaluation System for Fabrics (KES FB-Auto), of knitted fabrics with different fiber compositions and different types of knitted structures. The obtained results showed that the knitted structures have significantly influenced on the total hand value (THV) whereas the fiber compositions have shown a less effect on (THV). The existing results prove that the evaluation by KES FB-Auto system has been more beneficial for its basic of mechanical and surface properties. Moreover, the results could be analyzed for its new designing patterns for a refined, comfortable stretch fit.

scholarly journals Physical properties of single jersey derivative knitted cotton fabric with tuck and miss stitches

2020 ◽  
Vol 15 ◽  
pp. 155892502092853
Author(s):  
Alemayehu Assefa ◽  
Nalankilli Govindan
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Textile Industry ◽  
Areal Density ◽  
Knitted Fabrics ◽  
Commercial Use ◽  
Fabric Drape ◽  
Loop Shape ◽  
Low Stress Mechanical Properties ◽  
Single Jersey

The effect of different stitch combinations, namely, knit, tuck and miss stitches, on some of the physical properties of single jersey derivative fabrics have been studied. Fabrics which are in common commercial use in the textile industry were selected, and they are used as clothing fabrics. Knitted fabrics from 100% cotton yarn of 19.67 Tex on circular knitting machines were used in the study. The effect of knit structure on areal density, fabric thickness, air permeability, drape ability, stretch and recovery, shrinkage, and low-stress mechanical properties are investigated, and it was found that these properties are significantly affected by loop shape or knit structure, even though other knitting parameters remained the same. It was also found that the presence of tuck and float stitches for a given structure have a significant effect on fabric drape ability, width-wise extensibility, length-wise shrinkage, thickness, areal density and low-stress mechanical properties.

Prediction of Certain Low Stress Mechanical Properties of Knitted Fabrics from Their Structural Parameters

2015 ◽  
Vol 10 (2) ◽  
pp. 155892501501000
Author(s):  
R. Varadaraju ◽  
J. Srinivasan
Keyword(s):  
Mechanical Properties ◽  
Structural Parameters ◽  
Tensile Elongation ◽  
Shear Rigidity ◽  
Bending Rigidity ◽  
Knitted Fabrics ◽  
Spun Yarn ◽  
Ring Spun Yarn ◽  
Low Stress Mechanical Properties ◽  
Fabric Shear

Knitted fabrics are preferred as clothing materials because of of their outstanding comfort quality. 16 plain knitted fabric samples were produced from 4 combed ring spun yarn of linear densities 29.5 Tex, 23.6, Tex 19.7 Tex and 17.4 Tex and 4 different stitch lengths from each yarn linear density were selected for this study. The fabric samples were relaxed and then tested for tensile shear and bending properties using Kawabata tester's. KES- FB1and KES- FB2. The effect of various fabric structural parameters on fabric low stress mechanical properties was studied. The fabric shear rigidity, bending rigidity, shear hysteresis, bending hysteresis, and tensile linearity were positively correlated with the fabric GSM, thickness, and tightness factor and negatively correlated with fabric linear Stitch modulus, areal stitch modulus, volume stitch modulus, and porosity. The fabric tensile elongation was positively correlated with the fabric linear stitch modulus, areal stitch modulus, volume Stitch modulus, and porosity and negatively correlated with the fabric GSM, thickness, and fabric tightness factor. The above properties were higher in course direction than in wale direction. Separate prediction equations were developed for fabric low stress mechanical properties from Tightness factor, Volume Stitch modulus, and Porosity

Manufacturing Technique and Property Evaluation of Cotton/Polyester/ Rubber Composite Warp Knit

2012 ◽  
Vol 627 ◽  
pp. 302-306
Author(s):  
Jia Horng Lin ◽  
Shih Yu Huang ◽  
Hui Yu Yang ◽  
Ching Wen Lin ◽  
Jin Mao Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Fibers ◽  
Air Permeability ◽  
Cotton Yarn ◽  
Knitted Fabrics ◽  
Synthetic Fibers ◽  
Property Evaluation ◽  
Rubber Composite ◽  
Tearing Strength

Cotton fiber is a type of natural fibers. Using natural fibers to fabricate textile can not only decrease the consumption of synthetic fibers, but also reduce the environmental pollution. This study aims to fabricate elastic knitted fabrics and evaluate their properties. Polyester (PET) filaments and rubber threads serve as the warp while cotton yarn serves as the weft for warp knitting. A crochet machine makes the warp and weft into warp knits with desirable stretchability, during which the amount (single/double) and the ply number (1-, 2-, and 3-ply) of the weft are further varied. The resulting warp knits are evaluated for water absorption, air permeability, and mechanical properties. As demonstrated by the experimental results, the warp knits with single 1-ply weft (S1) yield an optimal air permeability of 224.6 cm3/cm2/s and stiffness along the warp direction of 4.74cm. The warp knits with single 2-ply weft (S2) display an optimal tearing strength of 86N while the warp knits with double 3-ply weft (D3/3) has an optimal tensile strength of 708N.

The effect of plasma treatment and tightness factor on the low-stress mechanical properties of single jersey knitted wool fabrics

2016 ◽  
Vol 88 (5) ◽  
pp. 499-509 ◽  
Author(s):  
Saeed Shaikhzadeh Najar ◽  
Xungai Wang ◽  
Maryam Naebe
Keyword(s):  
Mechanical Properties ◽  
Plasma Treatment ◽  
Evaluation System ◽  
Atmospheric Pressure Plasma ◽  
Surface Friction ◽  
P Value ◽  
Shear Rigidity ◽  
Bending Rigidity ◽  
Wool Fabrics ◽  
Low Stress Mechanical Properties

The effects of atmospheric pressure plasma treatment and the tightness factor on the low-stress mechanical properties of weft-knitted wool fabrics were evaluated using the Kawabata Evaluation System for Fabric (KES-F). The statistical analysis showed that the plasma treatment and the tightness factor had significant effects on the fabric low-stress mechanical properties ( p-value < 0.05). Plasma-treated fabrics showed significantly higher bending and shear rigidity and hysteresis, compression energy, thickness, compressibility, surface friction and lower compression resilience and geometrical roughness values compared with untreated fabrics. An increase in the fabric tightness factor significantly increased fabric thickness, bending and shear rigidity and hysteresis, and decreased tensile extensibility and geometrical roughness. The relationship between primary handle attributes evaluated by Wool HandleMeter and KES-F mechanical properties was also investigated. The results confirmed a highly linear correlation between these two sets of data, where rough/smooth and hard/soft attributes evaluated by the Wool HandleMeter had the highest correlation with bending rigidity, shear properties and bending hysteresis, as measured by the KES-F.

Effects of Kevlar volume fraction and fabric structures on the mechanical properties of 3D orthogonal woven ramie/Kevlar reinforced poly (lactic acid) composites

2017 ◽  
Vol 47 (8) ◽  
pp. 2074-2091 ◽  
Author(s):  
Jianxia Yang ◽  
Yitong Guo ◽  
Lan Yao ◽  
Qingqing Ni ◽  
Yiping Qiu
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Volume Fraction ◽  
Natural Fibers ◽  
Poly Lactic Acid ◽  
Delamination Resistance ◽  
3D Orthogonal Woven ◽  
Fabric Structures ◽  
Increasing Trends ◽  
The Impact

The proposed 3D orthogonal woven ramie/Kevlar reinforced poly (lactic acid) composite in this paper is a new type composite in which the 3D orthogonal structure has great advantages of high impact and delamination resistance due to the Z yarns and the hybridization of natural and manmade fibers provides not only partial environment friendly benefit but also efficient compensation for the relatively low mechanical properties from pure natural fibers. Eight types of the aforementioned composites were designed and fabricated. The results showed that as the volume fraction of Kevlar was increased, the tensile properties showed increasing trends, while the flexural properties were predominantly dependent on the fabric structures, especially, the weft yarns properties in the first and second layers from the upper and bottom surfaces. Furthermore, the impact strength was enhanced as the volume fraction of Kevlar increased to 5.5% and leveled off when Kevlar yarns continuously increased.

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