Nida Oglakcioglu

Moisture management and thermal absorptivity properties of double-face knitted fabrics

Double face fabrics are used to ensure better clothing comfort in sports and active wears. High moisture transfer properties of these fabrics affect their comfort properties and make them more functional. In this study, in order to investigate the moisture management properties of the double face fabrics, a special knitting structure, which has different or same yarn combinations in the face and back sides, was used. The selected yarns were cotton—cotton, cotton—polypropylene, polypropylene—cotton and polypropylene—polypropylene for face and back sides respectively. Moisture management properties and the changes of the thermal absorptivity values, which determine the warm-cool feeling, of the produced fabrics were determined and statistically analyzed. All measurements were done both in dry and wet conditions. The results indicate that, the polypropylene (inner)-cotton (outer) fabric has better moisture management property, provides high levels of comfort and can be preferred for summer, active and sports wear.

Thermal Comfort Properties of Angora Rabbit/Cotton Fiber Blended Knitted Fabrics:

In this study, thermal properties of different cotton and Angora rabbit fiber blended fabrics were investigated. It is known that cotton fiber has good comfort properties and Angora rabbit fiber is a speciality fur fiber which possesses good softness, whiteness and warmth. The aim of this study was to combine the excellent characteristics of these fibers to produce knitted fabrics with better comfort properties. First, short staple yarns were spun from cotton and Angora rabbit fibers with different blend ratios in two different spinning systems. Then, 1 × 1 rib knitted fabrics were produced with these yarns and the thermal comfort parameters of fabrics were measured on Alambeta and Permetest devices. Finally, according to end use, the optimum ratios were analyzed. The results indicated that the increase of Angora fiber ratio in the fabric and the spinning system affected the thermal comfort properties. The statistical analyses showed that only the fabrics including 25 % of rabbit fiber generated a significant difference on these parameters. Besides, the fabrics knitted from ring yarns had a warmer feeling at first touch and provided more thermal insulation but less water vapor permeability than the fabrics knitted from open-end yarns.

The abrasion resistance of socks

Purpose – The purpose of this paper is to explain the yarn parameters and some finishing process that can affect the abrasion resistance of socks in detail.Design/methodology/approach – The abrasion tests were made on socks produced from the most popular fibers (cotton, wool, PAC, PES, PA, and blends of these) by the Modificated Martindale method. The effects of fiber type, yarn count (for single and ply yarn), combing process, softness process with silicone and mercerization process to the abrasion resistance were investigated.Findings – It was found that the use of coarse yarns, addition of polyester, polyamide fibers or elastane filaments to the structure and application of the mercerization process increase the abrasion resistance of the socks. However, the silicone softeners decrease this value. The resistance of wool socks is higher than acrylics.Originality/value – Socks, which are a necessary item of clothing, need to be comfortable, affordable and retain their quality throughout their life. The m...

Pamuk/Elastan Örme Kumaşların Mukavemet ve Isıl Konfor Özellikleri

Bu calisma, farkli elastan iplik numarasi ve elastan besleme oraniyla uretilmis orme kumaslarin fiziksel, mukavemet ve isil konfor ozelliklerinin incelenmesini amaclamaktadir. Fiziksel test sonuclari, daha kalin elastan numarasi ya da yuksek elastan oraniyla orulen kumaslarin yuksek gramaj, kalinlik, patlama mukavemeti ve delinme direncine sahip oldugunu gostermistir. Isil konfor ozellikleri ise kalin elastan iplik numarasi ile tam elastanli yapida orulmus kumaslarin daha yuksek isil iletkenlik ve isil sogurganlik degerlerine sahipken, daha dusuk hava ve su buhari gecirgenligi sagladigini ortaya koymustur.

Analysis of the parameters affecting pressure characteristics of medical stockings

Compression stockings, which constitute one of the most important groups of compression garments, are engineered to regulate blood flow in venous systems in order to use in many medical fields such as supporting muscles and preventing edema. In the present study, it was aimed to analyze the effects of production parameters such as tightness, elastane yarn feeding tension and elastane yarn counts on pressure behavior of compression stockings, which are commonly used to adjust pressure values. The results of the statistical analysis indicated that the tested parameters had significant effects on pressure characteristics of compression stockings. Moreover, multiple regression analysis was used to investigate the relationship between the fabric parameters and pressure values. The analysis exhibited the strong impact of thickness and traversal elasticity on pressure characteristics. All parameters have positive impacts except traversal elasticity.

Investigation of Thermal Comfort Properties of Electrospun Nanofiber Mats

Thermal comfort properties such as air permeability, water vapor permeability and thermal resistance of a hydrophobic thermoplastic polyurethane (TPU) and a hydrophilic poly (vinyl alcohol) (PVA) electrospun nanofiber mats were evaluated in this study. Polycarboxylic acid; 1,2,3,4 butanetetracarboxylic acid (BTCA)was selected as cross-linking agent for PVA nanofibers. The aim of this study is to examine thermal comfort properties of both a hydrophobic and a hydrophilic nanofiber mat. The results revealed that air permeability of nanofibrous membranes was considerably low which provides a barrier effect. On the other hand, despite low air permeability, these materials showed superior water vapor permeability characteristic, which will sustain breathability of the skin.

Analysis and modeling of drying behavior of knitted textile materials

ABSTRACT Drying properties of textiles in summer and/or after any kind of physical activity resulted in sweating is of great importance for garments with high clothing comfort. This study analyzes the drying behavior of knitted fabrics produced from various fibers at different ambient air conditions. Drying kinetics and modeling of fabrics dried in standard environmental conditions were investigated in the first part. Polyester and lyocell fabrics were found to be the fastest drying samples. A two-stage modeling that is a combination of linear approach and thin-layer equations was used, and the best fitted equation was found to be the logarithmic one. The two-stage model was also proved to predict the drying rate. The second part included the effects of ambient humidity on drying times and rates. Drying time of polyester and polyester blended fabrics was affected by the increase in the humidity to a great extent. Furthermore, a quadratic function was found to be highly correlated with the computed data, so it was proposed to define the drying behavior by ambient air humidity and drying time.

Design of functional knitted fabrics for medical corsets with high clothing comfort characteristics

This study aims to achieve high comfort characteristics in medical corsets. For this aim, initially the expectations of users were determined by a survey and special yarns have been selected according to the survey responses. Then, different corset fabrics have been designed in a functional structure. Later, the most important body movement (stretchability), sensorial (bending rigidity) and thermophysiological comfort (air permeability, water vapour permeability, and thermal resistance) properties of these fabrics were tested and evaluated statistically. The results revealed that high levels of clothing comfort and performance properties can be established by different yarn types and fabric compositions and this will lead to achieve a successful medical therapy.

A novel medical bandage with enhanced clothing comfort

Compression garments are special textile products which apply a pressure on needed body zones for supporting medical, sport or casual activities. Medical bandages are a group of these garments and they have a very common usage for compression effect on legs or arms. These bandages are generally produced by using synthetic raw materials such as polyamide or polyester fibres. Medical bandages are in contact with skin. Even if the synthetic fibres are used, they may cause both comfort and health problems like allergies. Nowadays in textile sector, the expectations of clients include using of natural fibres as far as possible in all garments. Natural fibres have good advantages such as breathability, softness, moisture management ability, non-allergenic and ecologic structure and these characteristics present optimum utilization conditions. In this study, tubular medical bandages were manufactured by using core spun yarns (sheath fibres are selected as tencel, bamboo and cotton, core material is elastane) and their pressure and comfort (air and water vapour permeability) characteristics were investigated. The results indicated that the bandages have good comfort abilities beside adequate pressure values for compression effect. These garments can constitute a new production field for medical bandages with their comfort properties in addition to pressure characteristics.