Methods for determination of width of woven or knitted fabrics when relaxed at zero tension

2015 ◽  
Keyword(s):  
Knitted Fabrics

scholarly journals Porosity of Knitted Fabrics in the Aspect of Air Permeability - Discussion of Selected Assumptions

2017 ◽  
Vol 25 (0) ◽  
pp. 86-91 ◽  
Author(s):  
Marie Havlová ◽  
Jana Špánková
Keyword(s):  
Theoretical Calculations ◽  
Correlation Coefficients ◽  
Air Permeability ◽  
Knitted Fabrics ◽  
Textile Materials ◽  
Yarn Hairiness ◽  
The Relationship ◽  
Very High ◽  
Single Jersey

The main focus of this paper is to look into the relationship between the structure and air permeability of single jersey knitted fabric – especially verifying some basic assumptions. First, if it is possible to neglect the permeability of yarns themselves when we evaluate that of knits, and second, if yarn hairiness plays a significant role when we evaluate the relationship between air permeability and the porosity of knits. Theoretical calculations and experiments which were performed using an analysis of microscopic images of the structure of textile materials are used for the determination of inter-yarn and intra-yarn porosity. The paper aims to show t hat the characteristic dimension of inter-yarn pores is significantly higher than that of intra-yarn pores, and also that the values of inter-yarn porosity measured using image analysis methods with hairiness and after the removal of hairiness are statistically significantly different. The correlation coefficients for the porosity values measured and calculated are very high.

Determination of electromagnetic shielding and antibacterial properties of multifunctional warp-knitted fabrics

2014 ◽  
Vol 106 (11) ◽  
pp. 1203-1211 ◽  
Author(s):  
Zhi-Cai Yu ◽  
Jian-Fei Zhang ◽  
Ching-Wen Lou ◽  
Hua-Ling He ◽  
An-Pang Chen ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Electromagnetic Shielding ◽  
Knitted Fabrics

scholarly journals ВПЛИВ ПОВЕРХНЕВО-АКТИВНИХ РЕЧОВИН НА ПОВЕРХНЕВИЙ НАТЯГ РОЗЧИНІВ ДЛЯ ПРОМИВАННЯ БАВОВНЯНОГО ТРИКОТАЖУ

2018 ◽  
Vol 118 (1) ◽  
pp. 32-42
Author(s):  
О. Я. Семешко ◽  
Н. С. Скалозубова ◽  
Т. С. Асаулюк ◽  
Ю. Г. Сарібєкова ◽  
С. А. Мясников
Keyword(s):  
Surface Tension ◽  
Mechanism Of Action ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Maximum Reduction ◽  
Surface Active ◽  
Cotton Knitted Fabric ◽  
Active Substances

Analysis of the mechanism of action of surfactants in the conditions of washing cotton knitted fabrics, the establishment of surfactants for functional purposes, which should be part of the composition, and the study of changes in the surface tension of solutions of surfactants of various classes designed to create a composition for the preparation of cotton knitted fabrics. Determination of the surface tension of solutions of surfactants of different concentrations was carried out by the method of detachment of the ring, using the Du-Nui method. The paper presents the results of the analysis of the mechanism of action of surfactants in the conditions of washing cotton knitted fabrics, it is established what properties the constituents of the composition should possess and the surfactants that contribute to the maximum reduction in the surface tension of their solutions are determined. Scientifically substantiated the principles of creating surfactants compositions for the scouring of cotton knitted fabric on the basis of an analysis of the mechanism of their action and found that the wetting and washing abilities of surfactants are the determinants; the isothermal dependences of the surface tension of solutions of surfactants of various classes are first obtained. Surface-active substances and their concentrations are established, which ensure low surface tension of solutions.

Experimental and analytical analyses of the knitted fabric off-axes tensile test

2020 ◽  
Vol 91 (1-2) ◽  
pp. 62-72 ◽  
Author(s):  
Željko Penava ◽  
Diana Šimić Penava ◽  
Lozo Miloš
Keyword(s):  
Mechanical Properties ◽  
Correlation Coefficients ◽  
Knitted Fabric ◽  
Total Work ◽  
Fabric Anisotropy ◽  
Knitted Fabrics ◽  
Axial Tensile ◽  
Tensile Forces ◽  
Cotton Yarns

Determination of mechanical properties and predicting the behavior of knitted fabrics during the manufacturing process and finally in the use is an important part of textile science. In this study the influence of knitted fabric anisotropy on the values of maximum force, corresponding extension and total work when axial tensile forces act on specimens cut at different angles with respect to the course direction of the knitted fabric were analyzed. A plain double weft knit fabric made of single cotton yarns was studied. For different angles of cutting samples, the curves of the relation between the values of the tensile forces and the extension at break were experimentally obtained. The mathematical models obtained were compared with the experimental results, and the corresponding correlation coefficients were calculated.

scholarly journals Determination of Knitted Fabric Porosity Using Digital Imaging Techniques

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Manoj Kumar Imrith ◽  
Roshan Unmar ◽  
Satyadev Rosunee
Keyword(s):  
Computer Program ◽  
Digital Imaging ◽  
Imaging Techniques ◽  
Air Permeability ◽  
Knitted Fabric ◽  
Regression Equations ◽  
High Porosity ◽  
Knitted Fabrics ◽  
Geometrical Modeling

This paper has investigated the porosity of knitted fabrics using digital imaging techniques. A number of different methods have been proposed to determine the porosity of knitted fabrics, which include digital imaging, geometrical modeling, and air permeability. Digital imaging is an adequate technique to determine the porosity of high-porosity fabrics. In this work, eight types of knitted structures with eight different stitch lengths were produced on a flat-bed knitting machine. Porosity was determined using digital imaging techniques based on the method of threshold and pixel count, using a computer program developed for this work. The study consisted also of validating the results by including the data from two tested samples—from each set of knits throughout the use of regression equations which demonstrated that there is good correlation between the black mask and white mask images.

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