A Theoretical Approach for Prediction of Yarn Strength in Textile Industry

2009 ◽  
pp. 82-91
Keyword(s):  
Theoretical Approach ◽  
Textile Industry ◽  
Yarn Strength

Effect of finishing chemicals on tearing strength of plain-woven cotton fabric

2020 ◽  
Vol 24 (3) ◽  
pp. 229-243
Author(s):  
Priyanka Gupta ◽  
Manas Datta Roy ◽  
Subrata Ghosh
Keyword(s):  
Cotton Fabric ◽  
Textile Industry ◽  
Surface Characteristics ◽  
Processing Stage ◽  
Tear Strength ◽  
Content Type ◽  
Pullout Force ◽  
Yarn Strength ◽  
Wet Processing ◽  
Tearing Strength

Purpose This paper aims to assess the relationships amongst the tearing strength of fabrics after each chemical processing stage and after finishing of plain-woven cotton fabric. An effort has been made to study the effect of different finishing chemicals (tear improver) and their different concentrations on the high-density fabric tear strength and its sub-component with respect to the co-efficient of friction value of yarns for all the fabric samples. It also aims to establish a statistical model for prediction of tear strength with identified parameters as yarn–yarn friction co-efficient, yarn pullout force and single yarn strength. Design/methodology/approach In case of woven fabrics, it cannot be assumed that only yarn friction plays the role in deciding fabric-tearing strength. Whether the static or kinetic frictions need to be considered or the linear or capstan frictions have to be analyzed, to incorporate the results of friction analysis in the tearing behavior, need to be assessed. In the present work through a fabrication of yarn–yarn friction measurement, under a synchronized slow speed as that of actual fabric tearing (50 mm/min), has been carried out. After each wet processing stage, surface characteristics of yarns have been changed. Surface of yarns becomes smoother after finishing and rough after dyeing, which affects the co-efficient of friction of yarns, accordingly. Findings After each wet processing stage, the surface characteristics of yarns are changed. Surface structure of yarns becomes smooth after finishing and rough after dyeing, which affects the co-efficient of friction of yarns. For all the fabrics, the weft-way tearing strength is always higher than warp-way tearing strength. It is also observed that yarn pullout force is not the only responsible factor for tearing strength of such fabric. It is because of the combined action of yarn–yarn friction, yarn pullout force and single yarn strength for a given structure. Research limitations/implications A more extensive investigation with respect to concentration as well as further variety of chemicals requires to be identified for the optimum concentration level for each chemical. A mathematical model based on the three parameters as yarn–yarn co-efficient of friction, yarn pullout force and yarn strength for all woven fabric structure to achieve optimum strength level has been established which could be further extended for each fabric structures. Practical implications The problem has been identified from the day-to-day exercise of the commercial textile industry. The whole of the sample preparations have been done in the industry by using commercial machines under standard industrial conditions. The findings have been discussed and suitably introduced in the industry. Originality/value The whole of this paper has been unique in idea origination, sample preparation and execution of tests. The findings are very important for the researchers as well as for textile industry.

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

Novel Stage Decorations-A New Branch of Textile Industry

1910 ◽  
Vol 103 (19) ◽  
pp. 358-358
Author(s):  
Arthur H. J. Keane
Keyword(s):  
Textile Industry

Historic memory and propaganda. A theoretical approach to the communicative study of memory

2016 ◽  
Vol 0 (26) ◽  
pp. 71-94 ◽  
Author(s):  
Miguel Vázquez Liñán ◽  
◽  
Salvador Leetoy ◽  
Keyword(s):  
Theoretical Approach ◽  
Historic Memory

Collective Resource Mobilisation for Economic Survival within the Kurdish and Turkish Communities in London

2016 ◽  
Vol 6 (2) ◽  
pp. 219-239
Author(s):  
Olgu Karan
Keyword(s):  
Small Business ◽  
Textile Industry ◽  
Economic Capital ◽  
Small Business Owners ◽  
Coffee Shop ◽  
Business Ownership ◽  
Economic Survival ◽  
Collective Resource ◽  
Resource Mobilisation ◽  
Depth Interviews

This paper proposes a new conceptual framework in understanding the dynamics within the Kurdish and Turkish (KT) owned firms in London by utilising Charles Tilly’s work concerning collective resource mobilisation. Drawing on 60 in-depth interviews with restaurant, off-licence, kebab-shop, coffee-shop, supermarket, wholesaler owners and various community organisations, the paper sheds light upon the questions of why and how the KT communities in London moved into, and are over represented and why Turkish Cypriots are absent in small business ownership. The re-search illustrates that members of the KT communities aligned in their interests to become small business owners after the demise of textile industry in the midst of 1990s in London. The interest alignment in small business ownership required activation of various forms of capital and transposition of social, cultural and economic capital into one another.

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