Vasanth Kumar | Vellore Institute of Technology (original) (raw)

Papers by Vasanth Kumar

Fibres and Textiles in Eastern Europe

This research focused on the thermal comfort behaviour of polyester with respect to the type of y... more This research focused on the thermal comfort behaviour of polyester with respect to the type of yarn (spun, micro denier, continuous filament and hollow), linear density of the yarn (111 and 166 dtex), and the loop length of knitted fabric (0.25, 0.27 and 0.29 cm).The air permeability of continuous filament yarn fabric and micro denier yarn knitted fabrics was noted to be higher than that of spun yarn knitted fabrics. 111 dtex micro denier yarn fabric has the highest air permeability and 111 dtex spun yarn fabric the lowest air permeability value among all the other fabric samples. Comparatively, coarser spun yarn fabric has lower air permeability characteristics than finer microdenier fabric.The water permeability of the fabric shows a significant difference between the spun yarn, continuous filament yarn and Micro denier yarn knitted fabrics and between the linear density of the yarn. The water vapour permeability of spun yarn of 166 dtex single jersey fabric is higher, while the ...

Journal of Physics: Conference Series, 2021

For the process alarm management of chemical process safety analysis, its reliability mainly depe... more For the process alarm management of chemical process safety analysis, its reliability mainly depends on the design of the safety limit and the optimization of the technical process, but there are few studies on the overall reliability level of process alarm based on the alarm disposal rate under the influence of human factor reliability. By focusing on independent layer analysis technique in the alarm and response, we combined the human reliability analysis (HRA) technology and Bayes theory, to form Human Reliability Analysis in chemical process safety(Chem-HRA), an optimized quantitative evaluation algorithm for chemical alarm failure frequency. The algorithm was applied to a risk event on tank farm’s cut over, ensuring the reliability and accuracy of petrochemical process analysis and disposal of the process alarm.

Fibres & Textiles in Eastern Europe, 2020

Most of the time, a certain degree of stretch prominently and incrementally occurs in intimate we... more Most of the time, a certain degree of stretch prominently and incrementally occurs in intimate wear, leisure wear, sportswear, medical textiles etc., during their action. Variations in the stretch gradient would definitely cause changes in the air permeability of knitted fabrics. The influence of variables such as loop length, the presence of an elastomeric component and fabric structure on the air permeability of cotton single jersey and pique knitted fabrics in a stretched state was critically analysed. In this work, changes in the air permeability of cotton jersey samples with and without elastomer were investigated and reported by keeping the samples in static up to an incremental stretch of 40% at a rate of 10% of the stretch gradient, in a dry relaxed state, wet relaxed state and fully relaxed state.

This study, mainly focused on the effect of core-sheath ratio, twist and stitch length on the the... more This study, mainly focused on the effect of core-sheath ratio, twist and stitch length on the thermal comfort properties of single jersey knitted fabrics produced from various ratios (100:0, 80:20 and 60:40) of cotton/ polyester core spun yarns. The Box-Behnken design tool was used to study coresheath ratio, twist and stitch length on the thermal comfort properties of single jersey knitted fabrics and response surface equations were derived and design variables were optimized. From this study, the findings reveal that the decrease in cotton ratio among the fabrics made from core spun yarns decreases the fabric thickness and hence a more porous structure that results in higher thermal conductivity, air permeability, water-vapour transmission and less thermal resistance. It is also evidenced that, increase in the yarn twist (high) and the stitch length (tight) in the fabric structure makes thicker and less porous fabric which results in higher thermal resistance and lesser thermal conductivity, air permeability and water-vapour transmission.

Comfort is an aspect and is considered as one of the important characteristics of clothing. Gener... more Comfort is an aspect and is considered as one of the important characteristics of clothing. Generally, the comfort properties can be distinguished into three categories, viz., thermo-physiological comfort, sensorial comfort, and psychological comfort. Thermo-physiological comfort of a fabric is determined by the ability of the fabric to transmit heat, air, and moisture from the skin to the atmosphere. Fabric made of synthetic fibers has convincing comfort properties when compared with the fabrics made of natural fibers like cotton, silk, wool, etc. When natural fibers are compared with synthetic fibers, synthetic fibers are hydrophobic in nature and provides less comfort to the wearer. Hence, in this research work, an attempt has been made to study the thermo-physiological comfort properties of herbal finished woven fabrics made from synthetic fibers coated with neem and bermudagrass. Herbal finishes were applied on the woven fabrics made from 100% polyester and blends of 50:50 polyester, acrylic fibers. These finished fabrics were tested and analyzed for durability and essential thermo-physiological comfort properties. Based on the test results and analysis it was found that significant improvements in the moisture-related properties and moderate decrease in the thermal conductivity of the synthetic fabrics with neem and bermudagrass herbal finish.

FIBRES & TEXTILES in Eastern Europe, 2020

The moisture management properties of socks made from recycled polyester, virgin cotton and its b... more The moisture management properties of socks made from recycled polyester, virgin cotton and its blends were studied and compared. As an outcome of this research, the OMMC (Overall Moisture Management Capacity) of socks produced from recycled polyester fabrics gave higher values than those of virgin cotton fabrics. This result demonstrates that recycled polyester fabrics have good moisture management properties and faster water transport capacity compared to other fabrics. The lowest OMMC values were observed for virgin cotton fabrics.

Journal of Natural Fibers, 2020

Journal of Testing and Evaluation, 2021

Socks are considered to be one of the important accessories for humans in everyday life. Socks un... more Socks are considered to be one of the important accessories for humans in everyday life. Socks undergo irregular stretching in multiple directions during usage. The amount of stretching that occurs in socks is proportionate to the level of foot movement and the foot shape. The comfortability of socks lagely depends on the air permeability and thermal comfort properties. In general, the air permeability of the socks was measured in unstretched conditions. However, in real-time situations, the socks get stretched in multiple directions while being used. Stretch is one of the key factors that largely influences the air permeability of the socks. Few researchers have addressed this area; hence, the air permeability of the socks under various percentages of stretch is primarily focused on in this study. A novel automated fabric stretching attachment device was used to study the effect of stretching on the air permeability of recycled polyester/ virgin cotton and its blended socks. The results were statistically investigated by two-way analysis of variance by using SAS 8.0. A statistical analysis proved that the effect of the stretching and blend ratio was statistically significant on the air permeability properties of socks.

Fibers and Polymers, 2021

In this research work, it is proposed to study the thermal comfort properties of socks made from ... more In this research work, it is proposed to study the thermal comfort properties of socks made from virgin cotton and recycled polyester fibres and its blends. To determine the thermal comfort properties of socks the following parameters such as thermal conductivity, thermal resistance, air permeability and relative water-vapour permeability has to be investigated. Amongst the blends, higher the addition of recycled polyester content results in increased air permeability, thermal resistance and relative water-vapour permeability and decreased thermal conductivity values than the virgin cotton blends. Furthermore, it is noticed that recycled polyester ratio increases among the blends the fabric become thin, lighter and more porous with better thermal resistance, air permeability, relative water-vapour permeability and lesser thermal conductivity than the virgin cotton ratio in the blends. It is suggested that modifications in the fibre blends lead to changes in the fabric properties such as thickness which in turn affects the comfort properties of socks. The findings were statistically evaluated by analysis of variance (ANOVA) by using SPSS 15.0. Statistical result analysis also reveals that the blend ratio significantly affects all of the thermal comfort properties of the socks.

Fragrance finishing of textile materials has been greatly expanded and used in recent years. Frag... more Fragrance finishing of textile materials has been greatly expanded and used in recent years. Fragrance finishing can be done effectively using exhaust method than any other methods. If the fabric is treated with fragrance agents which exhibits higher durability of functionality is estimated. Fragrance finishing can be done by means of lavender aroma with non-ionic binder. This paper examines the effects of fragrance finished aloe-vera and cotton fabrics. Finally both the fragranced finished fabrics were made into wall hangings and the ambiance of the room was evaluated by comparing various factors. In this investigation, factors such as fabric performance, durability of the fragrance and laundering properties of the treated fabrics were investigated. The fragrance finished fabrics can be used in home textile applications such as wall hangings, table covers, carpets and sofa covers.

JOURNAL OF CRITICAL REVIEWS, 2020

India is an agricultural country. As per the 2014 FAO world agriculture statistics India is the w... more India is an agricultural country. As per the 2014 FAO world agriculture statistics India is the world's largest producer of banana with 30.5 million Tones per year. This seasonless banana tree not only having edible fruit and it can also be used for the purpose of fibre extraction. Currently, this pseudostem where we can extract fibre is considered to be waste. In olden days, our ancestors extracted fibre from the stem in a small scale. In India, Fibres are being used for preparing handicrafts, ropes, etc. the major problems of non-adoption of fibre extraction technology is low recovery of fibres leading to high transport cost. This plant has long been a good source for high-quality textiles in many parts of the world, especially in Japan and Nepal. In conclusion, this paper reviews the possibilities of converting banana fibre into Garment with spinning and blending possibilities. The feasibility will increase the utilization of waste in banana plant. The land of our country is suitable for Banana cultivation. The farmers will get benefitted and it will directly contribute to our national economy.