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1 – 10 of 438B.K. Behera, S. Chowdhry and M. Sobti
Polyester filament fabrics made from microdenier and normal denier yarn are compared for their low stress mechanical properties and hand values. Effects of twisting and sizing on…
Abstract
Polyester filament fabrics made from microdenier and normal denier yarn are compared for their low stress mechanical properties and hand values. Effects of twisting and sizing on microdenier filament fabric are studied. Sizing proves to be the most important process for microdenier multifilament yarn to realise its speciality effect in the fabric made out of this yarn.
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The paper aims to provide an investigation about the effect of some selected production parameters such as core yarn type, sheath sliver type and total yarn count factors on core…
Abstract
Purpose
The paper aims to provide an investigation about the effect of some selected production parameters such as core yarn type, sheath sliver type and total yarn count factors on core spun vortex yarns' evenness, imperfection and tensile properties. Hence it is aimed to contribute to the literature in vortex spinning where there are limited works related to core-spun vortex spinning.
Design/methodology/approach
The paper evaluates the effect of core yarn type, sheath sliver type and total yarn count factors on yarn evenness, imperfections, hairiness and tensile properties. Completely randomised three-factor analysis of variance (ANOVA) was conducted in order to evaluate the effect of core yarn type, sheath sliver type and linear yarn density on core spun vortex yarns' evenness, imperfection and tensile properties at significance level of 0.05. SNK tests were also performed for observing the means of each parameter. Correlation analysis was also conducted to reveal some relationships between yarn evenness and yarn tensile properties.
Findings
In this paper, significant factors related to some production parameters affecting the core-spun vortex yarns' evenness, imperfection, hairiness and tensile properties were found.
Originality/value
There are limited works related to effect of selected production parameters on yarn evenness, Imperfections and Tensile Properties of Hybrid Vortex Yarns.
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K. Chandrasekaran and M. Senthil Kumar
The purpose of this paper is to explore the synergic effect of wild turmeric (Curcuma Aromatica Salisb.) and holy basil (Ocimum Tenuiflorum L.) combination herbal extracts…
Abstract
Purpose
The purpose of this paper is to explore the synergic effect of wild turmeric (Curcuma Aromatica Salisb.) and holy basil (Ocimum Tenuiflorum L.) combination herbal extracts treatment on the moisture management properties of cotton, lyocell and micro-denier single jersey knitted fabrics and the factors affecting it, which is intended for the development of healthcare apparel products.
Design/methodology/approach
The pre-treated single jersey knitted fabrics of cotton, lyocell and micro-denier polyester fabrics were given finishing treatment with the wild turmeric (Curcuma Aromatica Salisb.) and holy basil (Ocimum Tenuiflorum L.) combination herbal extract proportions of 100%:0%, 75%:25%,50%:50%; 25%:75% and 0%:100%. The D-optimal factorial design developed using Design Expert software was used for the study. The finishing treatments were carried out using the pad−dry−cure method. The aim of the work is to find out the influence of combination herbal extract proportion, textile material and their interaction effect on the moisture management properties.
Findings
The ANOVA results revealed that the overall moisture management properties of single jersey knitted fabrics are influenced by the material type, combination herbal extract proportion and the interaction between material type and the combination herbal extracts proportion. The overall moisture management properties of combination herbal extracts treated cotton single jersey fabrics are found to be better than that of lyocell and micro-denier polyester fabrics due to their excellent accumulative one-way transport capability after the finishing treatment. Among the combination herbal extract proportions, 50:50 per cent combination herbal extract proportion was found to be better than other proportions.
Originality/value
The study on the moisture management properties of combination herbal extracts of wild turmeric (Curcuma Aromatica Salisb.) and holy basil (Ocimum Tenuiflorum L.) is a novel attempt to explore the synergic effect of active constituents in both the herbs.
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B. R. Das, D. Bhattacharjee, K. Kumar and A. Srivastava
Three types of polypropylene knitted fabrics in terry pile (uncut) structures with a similar knit design are developed by using fine denier filaments to make the inner layer for…
Abstract
Three types of polypropylene knitted fabrics in terry pile (uncut) structures with a similar knit design are developed by using fine denier filaments to make the inner layer for extreme cold weather clothing. The denier per filament is varied to assess its influence on thermo-physiological comfort properties, viz. thermal conductivity, thermal resistance and absorptivity, air permeability, water vapour permeability and wicking. The thermal properties are measured with an Alambeta instrument, and in-plane liquid flow through the fabrics is measured by using a gravimetric in-plane wicking tester. A statistical analysis is carried out at the 95% significance level for different experiments to establish the specific trend exhibited by the fabrics. It is observed that the water uptake increases, but water vapour permeability decreases with a decrease in filament denier. The thermal properties and air permeability values do not show any specific trends with filament denier. The porosity value is observed to be similar for all three developed fabrics.
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Gnanauthayan G., Rengasamy R.S. and Vijayakumar Kothari
This paper aims to deal with the thermal resistance of multilayer nonwovens. The effect of fibre denier, cross-sectional shape and positioning within the layers were analysed with…
Abstract
Purpose
This paper aims to deal with the thermal resistance of multilayer nonwovens. The effect of fibre denier, cross-sectional shape and positioning within the layers were analysed with respect to the thermal resistance. Moreover, effect of compression on thermal resistance of the multilayer nonwoven structure have also be studied.
Design/methodology/approach
The study involves multiple layering of thermal bonded nonwoven webs and the effect of fibre denier and positioning of different nonwovens from the hot plate. To avoid the increase in thermal resistance because of the air gaps between layers, the nonwovens were enclosed within an acrylic frame to compress them to a thickness of 12 mm. Compressional behaviour of the nonwovens were tested at a rate of 5 mm/min with peak compressive load of 50 N. Multilayer nonwoven assemblies were tested for thermal resistance with compressive pressure of 3.5 gf/cm2 and compared with that tested at zero pressure.
Findings
In the study, three-layered nonwoven structure, provided better thermal resistance than their single component counterparts. The structural characteristic of the multilayer nonwovens affected the conductive, convective and the radiative heat transfer. In a multi-layer nonwoven, the top most layer should have the finest fibre as possible. Second preference may be given to the middle and followed by bottom layers in terms of fibre fineness. However, fine solid fibres performed poorly in terms of compression and recovery resulting in poor thermal resistance under compressive load.
Originality/value
The experimental approach of controlling thickness while evaluating the thermal resistance will help in nullify the effect of air gaps between the layer interface, thus focussing on the effect of fibre denier and the positioning of nonwovens. This paper also discusses the unique properties of fine solid fibre and hollow fibres and their role in providing better thermal insulation for extreme cold weather applications.
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Sandra Cohen, George Venieris and Efrosini Kaimenaki
Despite the great interest in activity based costing (ABC), companies seem to be reluctant to adopt it. Our research aims at examining the rate of adoption of ABC by Greek…
Abstract
Purpose
Despite the great interest in activity based costing (ABC), companies seem to be reluctant to adopt it. Our research aims at examining the rate of adoption of ABC by Greek companies that belong to all three sectors of the Greek economy, i.e. manufacturing, retail and services, as well as investigating the reasons that influence a firm's decision to change its current cost accounting system.
Design/methodology/approach
An empirical survey via questionnaires was conducted during 2003 on a sample of 88 Greek leading companies and four company categories were identified in respect to their perceptions towards ABC (ABC adopters, ABC supporters, ABC deniers and ABC unawares).
Findings
Our findings indicate that ABC diffusion in Greece is quite satisfactory. Furthermore, we present evidence that firms that have implemented ABC (ABC adopters) have experienced multidimensional management facilitating benefits from the system. However, the adequacy of resources was found to be the variable that is positively and statistically correlated with the majority of problems encountered during ABC implementation process. On the other hand, the companies that include ABC in their future plans (ABC supporters) seem to be familiar with the corresponding expected benefits and potential problems of its adoption. We present evidence that the possibility of future ABC adoption is related to the degree of satisfaction from the currently used cost accounting system. Companies that do not intend to adopt ABC (ABC deniers) were found to be more satisfied with their existing cost accounting system in comparison to ABC supporters. We also report the characteristics of companies that still have complete ignorance of the ABC technique (ABC unawares).
Originality/value
The paper not only proceeds in a thorough analysis of the benefits perceived in relation to ABC as they have been presented in similar research, but also moves a step further and groups these benefits into distinct categories as well as ranks them in order of perceived importance. Furthermore, it analyzes the basic characteristics of the firms that have complete ignorance of ABC (ABC unawares), a group that is rarely met in ABC research papers.
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Shingosen fabrics (new synthetic‐fibre fabrics) have been accepted by consumers because of their new handling properties and are rapidly becoming popular as material for women's…
Abstract
Shingosen fabrics (new synthetic‐fibre fabrics) have been accepted by consumers because of their new handling properties and are rapidly becoming popular as material for women's dresses. Seam puckering, however, is becoming a serious problem in the sewing process for these fabrics, especially those fabrics woven with micro denier fibres. An investigation was carried out to correlate seam puckering with fabric mechanical properties and also with penetration force of sewing needles. The results are: (1) When sewing is carried out normally, the seam pucker of shingosen fabrics is well predicted by the “seam‐pucker prediction equation” which has been derived for men's suit fabrics, based on fabric weight and mechanical parameters derived by tensile, bending and shearing fabric properties. (2) The case that a sewing needle breaks woven yarns and makes holes (sewing eyes) in fabric is observed often in the sewing of high dense weave woven by micro denier fibres. In this case, the seam pucker is reduced because of less restriction of yarn movement through the holes. (3) A new prediction equation for seam pucker of shingosen fabrics is derived on the basis of sewing experiments with shingosen instead of the men's suiting equation. The prediction ability of this new equation is higher than that of men's suiting.
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Nicholas Blagden, Belinda Winder, Mick Gregson and Karen Thorne
The aim of this paper is to highlight the practical utility of using repertory grids with sexual offenders in denial and to demonstrate through a case study how they can be used…
Abstract
Purpose
The aim of this paper is to highlight the practical utility of using repertory grids with sexual offenders in denial and to demonstrate through a case study how they can be used to bolster both initial assessment and psychological formulation.
Design/methodology/approach
The study uses a single case study design and applies a repertory grid methodology, which is underpinned by personal construct psychology, to make sense of the case study. The analysis predominately focuses on the structure of the repertory grid.
Findings
The case study appeared to elicit factors that were of clinical utility and which could be used as tentative hypotheses for problem formulation and also seemed to point to an adequate starting point for intervention.
Research limitations/implications
The use of the case study makes generalisation difficult and future research may benefit from more large‐scale research.
Practical implications
Rather than subscribing to fatalist notions of deniers as untreatable, the paper argues that constructive work can be done with this population and that repertory grids can be one way to initially facilitate this process.
Originality/value
Currently “total deniers” are excluded from treatment and are seen as untreatable. It is argued here that this need not be the case and it is demonstrated how repertory grids can inform initial formulation with such offenders. Repertory grids have not been used with deniers before and this is an original feature of this research.
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The purpose of this paper is to study the influence of fibre properties on filtration behavior. Air pollution is a major threat to human beings due to industrialization and…
Abstract
Purpose
The purpose of this paper is to study the influence of fibre properties on filtration behavior. Air pollution is a major threat to human beings due to industrialization and urbanization. Among various particles in the atmospheric air, PM 2.5 causes various respiratory problems to human beings and also causes premature engine wear. The primary importance for the filters is higher filtration efficiency with lower pressure drop.
Design/methodology/approach
In this research, nonwoven filters were developed with different diameters of polyester fibres such as 0.8d, 1.2d and 6d fibres and different proportions of fibres were used. The Kuwabara cell model was used to derive certain parameters and its effects were analysed. The effect of basis length, solid volume fraction and porosity on filtration behavior was discussed in detail.
Findings
The filtration efficiency is higher for particle size from 1–3 µm, when different layers of polyester fibres are used with coarser fibres as the top layer and finer as the bottom layer. The filtration performance is better for layered nonwoven than unimodal nonwoven. The higher proportion of micro-denier fibres results in higher filtration efficiency with higher pressure drop.
Research limitations/implications
The proposed research is more suitable for the particle size of more than 1 µm because of the fibre diameters and its achievable porosity. The filtration efficiency can be increased further by increasing the mass per unit area, which also increases the pressure and is not recommended.
Originality/value
The effect of triple-layers with different diameters of fibres on filtration was analysed. Due to the variation in diameters of fibres in different layers, the filtration performance varies.
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Denise Voci and Matthias Karmasin
This conceptual paper aims to explore the current state of sustainability communication research, focusing on the challenges of communicating inconvenient truths in an era of…
Abstract
Purpose
This conceptual paper aims to explore the current state of sustainability communication research, focusing on the challenges of communicating inconvenient truths in an era of scientific mistrust. Therefore, this study aims to (1) examine the existing research landscape in sustainability communication, (2) identify unresolved problems and challenges, and (3) propose strategies for counteract misinformation through targeted communication.
Design/methodology/approach
For this, the authors conducted a critical literature review and analyzed the resulting sample (n = 473 journal articles) by means of qualitative content analysis to (1) evaluate existing communication approaches dealing with the communication of sustainability's inconvenient truth, (2) identify stakeholder groups involved in sustainability communication, (3) discuss limitations of current communication approaches and (4) present recommendations on (more) effective communication strategies to address the unresolved issues in sustainability communication.
Findings
The analysis reveals that when it comes to sustainability communication and its unresolved problems, literature refers to four key stakeholder groups: (1) science deniers; (2) adaptation skeptics; (3) whitewashers and (4) world saviors. Furthermore, the analysis provides valuable insights into the complex dynamics involved in communicating sustainability, emphasizes the need for tailored approaches to engage and address the concerns of each stakeholder group, and exposes limitations in current communication methods and approaches. Accordingly, the analysis highlights the necessity of developing new theories, models and methods specific to sustainability communication to tackle its unique challenges effectively.
Research limitations/implications
Like our society, communication sciences need a fundamental transformation to meet sustainability communication's new challenges induced by the necessary shift toward sustainable development.
Originality/value
This paper provides a comprehensive overview of the current state of sustainability communication in research, specifically addressing the challenges of effectively communicating unpleasant news in the context of scientific mistrust. It fills a gap in existing literature by examining the progress made in addressing these issues and identifying the emerging challenges that need to be addressed.
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