Analysis of warp-knitted fabric structure. Part II: theoretical study on initial modulus of warp-knitted fabrics (tricot, locknit, and satin)

2012 ◽  
Vol 103 (9) ◽  
pp. 997-1011 ◽  
Author(s):  
H. Dabiryan ◽  
Ali A.A. Jeddi ◽  
A. Rastgoo
Keyword(s):  
Theoretical Study ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Fabric Structure ◽  
Initial Modulus ◽  
Warp Knitted Fabric

Investigation of the Two-Bar Warp-Knitted Fabric Structure Effect on Luster Value

2014 ◽  
Vol 9 (2) ◽  
pp. 155892501400900
Author(s):  
Saeed Ajeli ◽  
Zoleykhah Ahmadvand
Keyword(s):  
Diffuse Reflection ◽  
Specular Reflection ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Fabric Structure ◽  
Measuring Surface ◽  
Before And After ◽  
Dark Color ◽  
Points Of View ◽  
Warp Knitted Fabric

Consumer points of view determine economical value of fabrics. Fabric luster plays a momentous role in attracting people's attention, especially for clothing and domestic purposes. Luster is defined by intensity of both specular and diffuse light reflection off of a surface. There are various methods for measuring surface luster. Gloss. Luster is described as the ratio of specular reflection in one angle to diffuse reflection in another angle. Two-bar warp knitted polyester fabrics such as Tricot, Locknit, Satin, reverse Locknit and Sharkskin in three different densities were provided. A mini gloss apparatus was applied to measure fabric specular reflection in the angle of sixty degrees, before and after disperse dying with different colors of white, blue and yellow. Results suggest that luster is a function of knitted fabric type, color and density. Enhancement of technical back luster resulted from longer underlap of the front bar. However, it did not change the technical face luster significantly. Density increased in all knitted fabrics and caused the luster to decrease. Dark color fabrics showed lower luster compared to light ones.

scholarly journals The Effect of Knitting Parameter and Finishing on Elastic Property of PET/PBT Warp Knitted Fabric

2017 ◽  
Vol 17 (4) ◽  
pp. 350-360 ◽  
Author(s):  
Qing Chen ◽  
Pibo Ma ◽  
Haiwen Mao ◽  
Xuhong Miao ◽  
Gaoming Jiang
Keyword(s):  
Elastic Property ◽  
Elastic Recovery ◽  
Knitted Fabric ◽  
Polybutylene Terephthalate ◽  
Knitted Fabrics ◽  
Heat Setting ◽  
Fabric Structure ◽  
Warp Knitted Fabric ◽  
The Relationship ◽  
Temperature Time

Abstract This study investigated the elastic elongation and elastic recovery of the elastic warp knittedfabric made of PET( polyethylene terephthalate) and PBT(polybutylene terephthalate) filament. Using 50/24F PET and 50D/24F PBT in two threadingbars, the tricot, locknit and satin warp knitted fabrics were produced on the E28 tricot warpknitting machine. The knitting parameters influencing the elastic elongation under 100N wereanalyzed in terms of fabric structure, yarn run-in speed and drawing density set on machine.Besides, dyeing temperature and heat setting temperature/time were also examined in order toretain proper elastic elongation and elastic recovery. The relationship between elastic elongationand knitting parameter and finishing parameter were analyzed. Finally, the elastic recovery ofPET/PBT warp knitted fabric was examined to demonstrate the elastic property of final finishedfabric. This study could help us to further exploit the use of PET/PBT warp knitted fabric in thedevelopment of elastic garment in future.

scholarly journals Moisture Comfort and Antibacterial Properties of Elastic Warp-Knitted Fabrics

2015 ◽  
Vol 15 (1) ◽  
pp. 60-66 ◽  
Author(s):  
Zhi-Cai Yu ◽  
Jian-Fei Zhang ◽  
Ching-Wen Lou ◽  
Hua-Ling He ◽  
An-Pang Chen ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Front Face ◽  
Water Evaporation ◽  
Knitted Fabric ◽  
Metal Composite ◽  
Knitted Fabrics ◽  
Blend Ratio ◽  
Fabric Structure ◽  
Back Face ◽  
Warp Knitted Fabric

Abstract Multifunction elastic warp-knitted fabrics were fabricated on a crochet machine with the use of metal composite yarns/viscose yarn and bamboo polyester/ crisscross-section polyester hybrid yarns as the front face and back face of the knitted fabric structure, respectively. We investigated the effect of the blend ratio of bamboo charcoal/ crisscross-section polyester multiply yarns on the fabric's moisture comfort properties, such as water vapour transmission (WVT), water evaporation rate (WER), and water absorbency. The results showed that blending ratio significantly influenced WVT and WER. Moreover, antibacterial activity of the elastic warp- knitted fabric was tested against Staphylococcus aureus and Escherichia coli in accordance with AATCC 90-2011. Finally, the extension- stress value curves were used to analyse the elastic stretching property, and the fabric exhibited greater breaking elongation and lower stress value in the walewise than in the weft direction.

Mechanical Response and Damage Analysis of 3D Multi-Structured Knitted Composite under Quasi-Tensile Loadings

2012 ◽  
Vol 476-478 ◽  
pp. 767-770
Author(s):  
Xi Wen Jia ◽  
Jia Zhi Su ◽  
Yi Zhu Zheng ◽  
Bo Hong Gu ◽  
Bao Zhong Sun
Keyword(s):  
Composite System ◽  
Mechanical Response ◽  
Strain Curve ◽  
Damage Mechanism ◽  
Core Material ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Initiation And Propagation ◽  
Damaged Zone ◽  
Warp Knitted Fabric

The mechanical response and damage mechanism of a 3D multi-structured knitted composite under quasi-tensile loadings are investigated based on experimental results. The multi-structured knitted composite consists of two knitted fabrics with weft double-faced interlock knitted fabric as core material and biaxial warp-knitted fabric as surface layer in the above-mentioned composite system, respectively. The tensile stress against strain curve is obtained to analyze the mechanical behavior. Furthermore, the failure mechanisms of 3D multi-structured knitted composite are discussed from the experimental observations by the initiation and propagation of damaged zone in knitted composites.

Shear Properties of Wool Plain-Knitted Fabrics

1976 ◽  
Vol 46 (4) ◽  
pp. 265-272 ◽  
Author(s):  
R. J. Hamilton ◽  
R. Postle
Keyword(s):  
Shear Force ◽  
Hysteresis Loops ◽  
Shear Behaviour ◽  
Knitted Fabric ◽  
Shear Rigidity ◽  
Knitted Fabrics ◽  
Fabric Structure ◽  
Applied Tension ◽  
Constant Tension ◽  
Applied Relaxation

An instrument is described for the measurement of shear in knitted fabrics under conditions of constant tension and “equal length of side.” Shear hysteresis loops were obtained for a series of wool plain-knitted fabrics of different tightness factors. Typical curves and fabric parameters (shear rigidity and coercive shear force) are presented for the fabrics tested in two states of relaxation using several values of applied tension. The results have been analyzed statistically and a simple friction-elastic rheological model of the shear behaviour is examined. This model is interpreted in terms of the knitted fabric structure and the changes that occur when a shear deformation is applied. Relaxation was found to reduce the values of both the shear rigidity and the coercive shear force. The effect of tension was investigated, and suitable levels of tension are recommended for testing knitted fabrics in shear.

Comparison of methods for measurement of the pressure exerted by knitted fabrics

2016 ◽  
Vol 87 (17) ◽  
pp. 2117-2126 ◽  
Author(s):  
Małgorzata Cieślak ◽  
Agnieszka Karaszewska ◽  
Ewa Gromadzińska ◽  
Izabela Jasińska ◽  
Irena Kamińska
Keyword(s):  
In Vitro Tests ◽  
Knitted Fabric ◽  
In Vitro Test ◽  
Knitted Fabrics ◽  
Weft Knitted Fabric ◽  
In Vivo Tests ◽  
Vitro Test ◽  
Warp Knitted Fabric

The article presents the results of measurements of pressure exerted by two model knitted products – bands with different structure (WI jersey weft-knitted fabric and WII openwork warp-knitted fabric). The tests were carried out with using the I-Scan system (in vivo and in vitro tests) and the STM 579 device (in vitro test). A comparative analysis of the in vivo and in vitro results for the I-Scan method and in vitro results for the I-Scan and STM 579 method was performed. It was found that the pressure values are lower for openwork warp-knitted fabric than for jersey weft-knitted fabric both in the case of the in vitro and in vivo tests, and the values of pressure for the same band are higher in the case of the in vitro tests.

Sign in / Sign up

Export Citation Format

Share Document