Cukurova University,Department of Textile Engineering, Main Branch of Textile Technology

Hello! I am Abdurrahman Telli, academician at the Cukurova University, TR. My research activities are related to textile technology, sustainable textile and recycling in textiles. This site contains information about my publications, projects, books and events.

The effects of metal type, number of layers, and hybrid yarn placement on the absorption and reflection properties in electromagnetic shielding of woven fabrics

In this study, stainless steel, copper, and silver wires were intermingled with two polyamide 6.6 filaments through the commingling technique to produce three-component hybrid yarns...

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An Image Processing Research Consistent with Standard Photographs to Determine Pilling Grade of Woven Fabrics

Objective results corresponding to each parameter were analyzed comparatively with these subjective results.The developed method was successful by using mean of matrix elements from textural parameters and total area from pill characteristics....

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Usage of Recycled Cotton and Polyester Fibers for Sustainable Staple Yarn Technology

In this study, yarns were produced from cotton fibers (CO), recycled cotton fibers obtained from yarn wastes (r-CO) and fibers produced from recycled PET bottles (r-PET).Tensile strength, elongation at break, unevenness (CVm), yarn imperfections (IPI) values and hairiness properties of these yarns were measuredThe purpose of this study was to eliminate negative characteristics of recycled cotton and polyester fibers with using together by open-end spinning system..

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March 25, 2020

Usage of Co-mingling Process in Production of Metal Hybrid Yarn

In this study, polyamide 6.6 yarns with copper, silver and stainless steel metal monofilaments were combined in intermingling machine by commingling method. 

The purpose of this paper is to develop a fast and cost-effective alternative method for production of hybrid yarns containing metal filaments. Microscope images of the produced hybrid yarns were taken. Linear density, breaking force, breaking elongation and hairiness were measured in these yarns. It has been observed that the use of metal filament has a negative effect on yarn quality values. 

The best yarn properties were obtained from hybrid yarn containing stainless steel. Filament breakage were determined in the production of hybrid yarns containing silver and especially copper metals. It was determined that this filament breakages can be an important problem for subsequent processing steps such as weaving or knitting. In the future studies, the hybrid yarn properties can be optimized by changes on process parameters of intermingling machine and metal filament properties.

Source: Journal of Science and Engineering
Publisher: Dokuz Eylül University Faculty of Engineering
Original Language: Turkish
Document type: Article / Open Access


Cited by 1 documents except author up to this time :

1. İlkan, Ö. (2020). Investigation of the technical and physical properties of metal composite 1× 1 rib knitted fabrics. Industria Textila, 71(1), 41-49.

Last Updated: 25.03.2020
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October 16, 2019

Soilless Cotton & Non-Petroleum Polyester- Potential Opportunities for Sustainability in Textiles

Today, most of people who start off for an environmentally friendly application do more damage to sustainability compared with conventional methods. 

Therefore, this book primarily aims to understand real sustainable production. 

Secondly, it is emphasized in this book that wastes of textiles and garments constitute a major environmental load. 

At this point, it is pointed out that recycling is the best solution for humanity. 

It is highlighted that recycling presents us the opportunity to obtain “soilless cotton” and “non-petroleum polyester”. 

This book examines these two recycled fibers that have important potentials for sustainability by using arguments obtained from the author's knowledges, experiences, researches and latest literature. 

Finally, it is pointed out that habitat provided by people who do the right things for sustainability are begun to be abused by malicious ones. 

This book describes how to become true environmentalists, how real environmentalists can recognized and the main principles of sustainability and recycling in textiles. 

This book gives suggestions to producer, consumer, academicians and researchers in this field.

ISBN: 978-605-327-928-0
Publication Date: August 2019
Original Language: English
Document type: Book/ Restricted Access
Publisher: EKİN Basım Yayın Dağıtım
Şehreküstü Mah. Cumhuriyet Cad.
Durak Sk. No: 2 Osmangazi / BURSA
Tel .: (0.224) 220 16 72 - 223 04 37
Fax.: (0.224) 223 41 12
e-mail: info@ekinyayinevi.com
www.ekinyayinevi.com

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The effects of metal type, number of layers, and hybrid yarn placement on the absorption and reflection properties in electromagnetic shielding of woven fabrics

In this study, stainless steel, copper, and silver wires were intermingled with two polyamide 6.6 filaments through the commingling technique to produce three-component hybrid yarns. 

The produced hybrid yarns were used as weft in the structure of plain woven fabric samples. 

The electromagnetic shielding effectiveness parameters of samples were measured in the frequency range of 0.8–5.2 GHz by the free space technique. 

The effects of metal hybrid yarn placement, number of fabric layers, metal types, and wave polarization on the electromagnetic shielding effectiveness and absorption and reflection properties of the woven fabrics were analyzed statistically at low and high frequencies separately. 

As a result, the samples have no shielding property in the warp direction. Metal types show no statistically significant effect on electromagnetic shielding effectiveness. 

However, fabrics containing stainless steel have a higher absorption power ratio than copper and silver samples. 

Double-layer samples have higher electromagnetic shielding effectiveness values than single-layer fabrics in both frequency ranges. 

However, the number of layers does not have a significant effect on the absorbed and reflected power in the range of 0.8–2.6 GHz. 

There was a significant difference above 2.6 GHz frequency for absorbed power ratio. 

An increase in the density of hybrid yarns in the fabric structure leads to an increase in the electromagnetic shielding effectiveness values. 

Two-metal placement has a higher absorbed power than the full and onemetal placements, respectively. 

The samples which have double layers and including metal wire were in their all wefts reached the maximum electromagnetic shielding effectiveness values for stainless steel (78.70 dB), copper (72.69 dB), and silver composite (57.50 dB) fabrics.

Source: Journal of Engineered Fibers and Fabrics
Publisher: Association of the Nonwoven Fabrics Industry
Original Language: English
Document type: Article / Open Access



Cited by 2 documents except author up to this time :

1. İlkan, Ö. (2020). Investigation of the technical and physical properties of metal composite 1× 1 rib knitted fabrics. Industria Textila, 71(1), 41-49.

2. Özkan, İ. (2019). Investigation on antimicrobial activity and electromagnetic shielding effectiveness of metal composite single jersey fabrics. Journal of Engineered Fibers and Fabrics, 14, 1558925019895984.

Last Updated: 25.03.2020
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October 15, 2019

An Image Processing Research Consistent with Standard Photographs to Determine Pilling Grade of Woven Fabrics

Objective results corresponding to each parameter were analyzed comparatively with these subjective results. 

The developed method was successful by using mean of matrix elements from textural parameters and total area from pill characteristics.
 
In this study, MATLAB 2018a software was used to evaluate pilling grade of woven fabrics objectively.

Experimental works were carried out on the EMPA W3 standard photographs and accordingly two woven fabrics.

Equations were built based on the measurements of pill characteristics and textural parameters of these photographs with the help of curve fitting method after image processing steps.

Intervals were generated for each fabric by using slope of these equations and quantitative parameters obtained from the original fabric.

Furthermore, fabrics that were provided pilling formation at different test turns were evaluated subjectively by expert operators. 

Source: Tekstil ve Konfeksiyon
Publisher: Ege University Textile and Apparel Research & Application Center
Original Language: English
Document type: Article / Open Access


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May 30, 2019

Properties of Yarns Obtained by Combining FDY with POY, CDPET and Micro POY Polyester Filaments Under Different Texturing Conditions and Their Visual Effects in Knitted Fabric

In recent years, combination of filament yarns in continuous yarn production are used for innovative product development studies.

In this study, POY and FDY polyester filaments having different structures and specifications were combined using nip-twisters by false-twist texturing method.

Twelve different yarns were obtained by using constant FDY and three different POY materials with the state of FDY in first heater and two different drawing values.

Linear density, breaking force, breaking elongation, shrinkage in boiling water and number of nips were measured in these yarns.

Furthermore, the visual effects in knitting fabrics produced from texturized yarns were investigated.

It was observed that the produced combined yarns have different structural and visual effects compared to single textured yarn.

Source: Journal of Science and Engineering
Publisher: Dokuz Eylül University Faculty of Engineering
Original Language: Turkish
Document type: Article / Open Access

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