Investigation of the adhesion properties of direct 3D printing of polymers and nanocomposites on textiles: Effect of FDM printing process parameters

Personal cooling technologies locally control the temperature of an individual rather than a large space, thus, providing personal thermal comfort while supplementing cooling loads in thermally regulated environments. This can lead to significant energy and cost savings. In this study, a new approach to personal cooling was developed using an infrared-transparent visible-opaque fabric (ITVOF) that provides passive cooling via the transmission of thermal radiation emitted by the human body directly to the environment. Here, we present a conceptual framework to thermally and optically design an ITVOF. Using a heat transfer model, the fabric was found to require a minimum infrared (IR) transmittance of 0.644 and a maximum IR reflectance of 0.2 to ensure thermal comfort at ambient temperatures as high as 26.1 °C (79 °F). To meet these requirements, an ITVOF design was developed using synthetic polymer fibers with an intrinsically low IR absorptance. These fibers were then structured to minimize IR reflection ...

Infrared-Transparent Visible-Opaque Fabrics for Wearable Personal Thermal Management

IBM SPSS for Intermediate Statistics: Use and Interpretation, 4th Edition

This study surveys the ordered weighted averaging OWA operator literature using a citation network analysis. The main goals are the historical reconstruction of scientific development of the OWA field, the identification of the dominant direction of knowledge accumulation that emerged since the publication of the first OWA paper, and to discover the most active lines of research. The results suggest, as expected, that Yager's paperIEEE Trans. Systems Man Cybernet, 181, 183-190, 1988 is the most influential paper and the starting point of all other research using OWA. Starting from his contribution, other lines of research developed and we describe them.

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Ordered Weighted Averaging Operators 1988-2014: A Citation-Based Literature Survey

Wind farm land suitability indexing using multi-criteria analysis

In order to determine the effect of raw material, weave type and tightness on liquid absorption and transmission which is an important factor in the perception of people’s clothing comfort, knitted fabrics made of cotton, viscose and polyester yarns, which had single jersey, 1 × 1 rib and single pique weave type, had three different tightness as tight, medium and loose, were produced. Moisture management tester (MMT) was used for multi-dimensional liquid transport of the fabrics produced. As a result of the study, it is observed that polyester fabrics had higher OMMC values than those of cellulosic-based fabrics. Regarding the effect of tightness, liquid transport has decreased with increasing tightness in general. Weave types examined in this study, were not as strong as raw materials and tightness and did not have such a significant effect.

Evaluation of moisture management properties on knitted fabrics

Sensory evaluation of tactile properties of fabrics is a subject many researchers have studied for years and which still has importance and is also open to improvements. Particularly for suitings, the sensory evaluation of fabric handle or of other tactile properties has a greater importance. This article explains sensory evaluation techniques for stiffness, thickness and smoothness, which are the components of fabric handle of suitings. These sensory techniques are introduced by the authors and studied in 100% worsted wool suitings. The concordances of sensory test results are investigated by Kendall's concordance test, and correlation analyses are carried out to examine the relations between sensory results.

Sensory evaluation methods for tactile properties of fabrics

In this study, structural, physical and mechanical properties of cotton-Tencel and cotton-Promodal blended ring, compact and vortex spun yarns were compared. Yarn properties such as hairiness, unev...

The properties of cotton-Tencel and cotton-Promodal blended yarns spun in different spinning systems

Thermal comfort is one of the most important components of comfort which shows physiological, psychological, and physical harmony between human body and environment. The heat and moisture transfer capacity of fabric from skin to environment affects the thermal comfort of garments. The transfer capacity depends on the characteristic features of raw materials and fabric structural properties. In this study, it is aimed to determine the advantages of knitted fabric types, taking into account the environmental condition and activity level by measuring the thermal comfort properties such as air permeability, wicking, moisture management, thermal and water vapor resistances. Two knitted structures composed of tuck and float combinations and six raw materials were chosen for the fabrics produced. According to the measurement results, the polyester and cotton/Coolmax fabrics with float stitches have had good liquid moisture transport properties. Besides, high air permeability and low water vapor resistance have b...

Thermophysiological comfort properties of selected knitted fabrics and design of T-shirts

Consumers prefer garments that not only look good but also feel good especially during the last years because of their increased consciousness about a better life. Therefore, there have been many studies about subjective evaluation techniques such as subjective wear trials and consumer research techniques to understand how consumers perceive clothing and formulate their comfort perceptions at any specific moment. In this study, the meaning and importance of clothing comfort and main comfort problems according to a group of Turkish consumers having different properties were determined by a questionnaire survey study. Analysis of the results indicated that, garment fit and comfort were the most important criteria for the investigated group during purchase decisions and nearly all of the respondents considered clothing comfort as more important than before. The basic comfort problems of people were mostly related to ease of movement, sweating and garment fit. This study is a preparation stage for wear trials that will constitute the subjective part of a comfort evaluation method to be developed.

PRACTICAL APPLICATIONS
In the modern consumer market, meeting the consumer needs is the key factor for success and the only way to determine the needs is to measure them by subjective methods and find out the relationships between subjective results and physically measurable parameters. It is thought that, data obtained from this questionnaire survey would be helpful in creating a general overview about the meaning of comfort in a group of Turkish consumers' minds and their purchase behaviors. Sensory descriptors obtained from this study will be used for wear trials to get more reliable results, which will constitute the subjective part of a wider project. Conclusions put forward about objective and subjective measurements will guide fiber and textile producers about the needs and preferences of Turkish consumers. Consequently, they can determine their quality level suitable for specific consumer groups.

Ayşe Okur

Papers

Evaluation of moisture management properties on knitted fabrics

Sensory evaluation methods for tactile properties of fabrics

The properties of cotton-Tencel and cotton-Promodal blended yarns spun in different spinning systems

Thermophysiological comfort properties of selected knitted fabrics and design of T-shirts

The meaning and importance of clothing comfort: a case study for turkey