NOPR Collection:

Improvement in dyeing, electro resistivity, and anti-microbial properties of acrylic fibres

2018-06-01T00:00:00Z

Title: Improvement in dyeing, electro resistivity, and anti-microbial properties of acrylic fibres Authors: Baseri, Somayeh Abstract: A simple and low-cost method has been developed to obtain dyed fibres with high electrical conductivity, as well as anti-microbial properties in nature. Fibres are first heat- treated in a solution containing cupric nitrate, sodium sulfide, and sodium hydrogen sulfate. Afterwards the treated fibres are dyed with a cationic dye. Results show that the pretreatment of fibres with conductive layer leads to the improvement in dye uptake, antimicrobial performance of the fibres as well as their reduced electrical resistivity. Using the results obtained from the present study, an appropriate suitable formulation has been developed for application and optimization of dyeing of coated fibres. The coated fibres show excellent fastness properties in terms of electrical conductivity and antimicrobial changes. After dyeing by a cationic dye, the electrical conductivity and antimicrobial properties of the fibres do not decrease. Copper sulfide coating can therefore be claimed as a simple method to produce textiles with good antistatic and antimicrobial properties, while at the same time, having very good fastness properties and laundering durability along with the increased dye ability of the samples. Page(s): 143-152

Effect of yarn fineness and various knitting parameters on ultraviolet resistance of knitted fabrics

2018-06-01T00:00:00Z

Title: Effect of yarn fineness and various knitting parameters on ultraviolet resistance of knitted fabrics Authors: Banerjee, Debamalya; Mal, Prithwiraj; Ghosh, Anindya; Majumdar, Abhijit Abstract: The ultraviolet protection factor (UPF) for single jersey and 1×1 rib knitted fabrics has been investigated. The influence of yarn fineness, loop length, carriage speed and yarn input tension as well as their interactions are studied. The effect of unavoidable and uncontrolled random variables on UPF has also been investigated for both types of knitted fabrics. Orthogonal block Box and Behnken design of experiment is used to study the effect of uncontrolled random variables as well as controlled variables like yarn fineness, carriage speed, yarn input tension, loop length and their interactions. The results show that the uncontrolled random variables, during preparation of the samples, do not have any significant impact on resultant UPF for both single jersey and 1×1 rib knitted fabrics. The yarn fineness and the loop length have significant influence on UPF for both types of knitted fabrics. This study will be beneficial in engineering/designing fabrics and clothing of desired comfort with minimum damage to human body due to ultra-violet rays. Page(s): 153-157

Predicting behavior of needled geotextile materials made of recycled polyester fibres up to yield point

2018-06-01T00:00:00Z

Title: Predicting behavior of needled geotextile materials made of recycled polyester fibres up to yield point Authors: Trajković, Dušan; Stepanović, Jovan; Stojiljković, Dragan; Đorđić, Dragan Abstract: The paper reports the results of the analysis of mechanical properties of nonwoven geotextile material from recycled polyester fibres of areal density 150, 200, 250, 300 and 500 g/m². Also, the limits to yield point of needled geotextile materials, which define the permissible loads of geotextiles, are determined. Using mechanical models (model of Lethersich) and experimental results, the behavior of needled geotextiles made of recycled polyester fibres in the region up to the yield point can be described. The proposed method and the results can be used to predict the acceptable loads that nonwoven geotextile materials made from recycled polyester fibres can be subjected to exploitation with application. Page(s): 158-163

Influence of ring frame process parameters on yarn structure and fabric assistance

2018-06-01T00:00:00Z

Title: Influence of ring frame process parameters on yarn structure and fabric assistance Authors: Ishtiaque, Saiyed M; Ghosh, Dipanjan; Yadav, Vijay K Abstract: An attempt has been made to study the influence of ring frame parameters i.e. yarn twist multiplies, spindle speed and ring frame draft on yarn characteristics to exploit the translation of yarn structures into the fabric assistance.Understanding the relationship between yarn structure and fabric strength helps in engineering the yarn structure to improve the strength translation of yarns to fabric strength. Accordingly, study on fabric strength in weft/warp direction per yarn, weft/ warp break force inside fabric, weft/warp pull-out force and yarn failure zone length are also carried out.Yarn structure is found to affect the fabric thickness and fabric tensile behaviour. The yarn diameter has a direct effect on the yarn pull out force. The yarn structure also plays a dominant role in deciding the yarn failure zone length. Page(s): 164-172