Abdurrahman Telli

The effect of recycled fibers on the washing performance of denim fabrics

Abstract In this study, denim fabrics were produced with yarns obtained from cotton fibers (CO), recycled cotton fibers obtained from yarn wastes (r-CO), and fibers produced from recycled PET bottles (r-PET). Enzyme and stone washing processes were applied systematically on these fabrics. Mass per unit area, breaking force, elongation at max force, tear strength, air permeability, and circular bending rigidity of fabrics were measured. The findings showed that r-CO fiber has negative effect on tear and breaking force. Breaking force, elongation at max force, and tear strength values of the fabrics increased depending on the increase in r-PET content. However, fabric handle was negatively affected associated with the r-PET ratio due to the increase in stiffness. Mass per unit area, breaking force, air permeability, and circular bending rigidity values of fabrics decreased after the washing processes. The effect of fibers on enzyme- or stone-washed fabrics showed a change according to finished fabrics. It can be said that fabrics containing r-PET are more resistant than cotton and recycled cotton in various aggressive denim washing methods such as bleaching or different washing process conditions such as rising temperature, and time.

Mikrofilament İplik Yapılarının Denim Kumaş Performans Özellikleri Üzerine Etkisi

When efforts for innovation in product design are combined with developments in filament yarn technology, these yarns open different alternatives on behalf of evaluate the textile industry. From this point of view, usage of filament and multifilament yarn structure in denim sector has been a research subject. In this study, denim fabrics were designed and produced by using multifilament polyester yarns with seven different filament numbers. The tensile strength (warp/weft), tear strength (warp/weft), stretch properties, air permeability, stiffness, water vapor absorption and hydrostatic pressure test of fabrics were performed. Fabric stiffness increase and air permeability decrease as long as yarns have more microstructure through higher filament number. Moreover, it is foreseen that fabric problems may be experienced in terms of elasticity growth when yarns have higher filament number.Filament iplik teknolojisindeki gelismelerle birlikte urun tasarimindaki yenilik arayislari birlestirildiginde, bu ipliklerin tekstil endustrisinde degerlendirilmesi adina farkli alternatifler ortaya cikmaktadir. Buradan hareketle filament ve multifilament iplik yapilarinin denim sektorunde kullanilabilirligi arastirma konusu olmustur. Bu calismada yedi farkli filament sayisindaki multifilament polyester iplikler kullanilarak denim kumaslar tasarlanip, uretilmistir. Kumaslarda kopma mukavemeti (atki/cozgu), yirtilma mukavemeti (atki/cozgu), esneklik, yumusaklik, hava gecirgenligi, nem alma ve su gecirgenligi testleri gerceklestirilmistir. Ipligi olusturan filamentler incelerek daha mikro yapiya ulastikca yumusakliginin arttigi, bu sirada ise hava gecirgenliklerinin azaldigi gorulmustur. Bununla birlikte iplik yapisindaki filamentler inceldikce de, kumaslarda kalici uzama acisindan problemlerin yasanabilecegi ongorulmektedir.

Utilization of Waste Yarns in Hair Interlining Industry

There has been an innovation need for utilizing fine yarn wastes nowadays. In this study, probability of using yarn wastes in hair interlining industry has been investigated. Information about hair interlining was given and production problems were investigated. It was underlined that by using wastes these problems can be solved environment-consciously. Mass per unit area, breaking strength, elongation at break, fiber blending ratio, circular bending stiffness, and dimensional change of standard and environment-friendly interlinings were tested and comparatively investigated. Consequentially, environment-friendly hair interlinings produced from different yarn wastes have lower shrinkage results. It was found that breaking strength, elongation at break, and circular bending stiffness results of the two fabrics had no remarkable difference. With this study, suitable utilizing area for waste yarns were found and singeing and sizing steps of the production were eliminated. In every sense, this study brings innovations for hair interlining production and makes contributions to the environment.

Şönil İpliklerin Denim Kumaş Üretiminde Kullanılabilirliği Üzerine Bir Çalışma

ÖZET: Kış aylarında denim kumaşın kullanımını arttırmak üzere çeşitli uygulamalardan faydalanılmaktadır. Ancak mevcut uygulamalar kumaşın giyim konforunu olumsuz etkilemektedir. Bu çalışmada bir fantezi iplik çeşidi olan şönil ipliklerin bahsedilen giyim konforunu geliştirerek denimde kullanılabilirliği araştırılmıştır. Aynı gramajdaki klasik denim kumaşla atkısında şönil ipliği kullanılmış denim kumaşın kopma mukavemeti, kopma uzaması, yırtılma mukavemeti ve aşınma dirençleri arasındaki fark incelenmiştir. Sonuç olarak şönil ipliğin tipik özelliği olan düşük aşınma değerlerinin aksine, tahmin edilenlerden farklı sonuçlar elde edilmiştir. Ayrıca elde edilen kumaşın yırtılma mukavemeti, kopma mukavemeti ve uzaması bakımından da kabul edilebilir seviyelerde değerler aldığı görülmüştür.Kis aylarinda denim kumasin kullanimini arttirmak uzere cesitli uygulamalardan faydalanilmaktadir. Ancak mevcut uygulamalar kumasin giyim konforunu olumsuz etkilemektedir. Bu calismada bir fantezi iplik cesidi olan sonil ipliklerin bahsedilen giyim konforunu gelistirerek denimde kullanilabilirligi arastirilmistir. Ayni gramajdaki klasik denim kumasla atkisinda sonil ipligi kullanilmis denim kumasin kopma mukavemeti, kopma uzamasi, yirtilma mukavemeti ve asinma direncleri arasindaki fark incelenmistir. Sonuc olarak sonil ipligin tipik ozelligi olan dusuk asinma degerlerinin aksine, tahmin edilenlerden farkli sonuclar elde edilmistir. Ayrica elde edilen kumasin yirtilma mukavemeti, kopma mukavemeti ve uzamasi bakimindan da kabul edilebilir seviyelerde degerler aldigi gorulmustur.