Örme Kumaş Gözenekliliği ile Hava Geçirgenliği Arasındaki İlişkinin İncelenmesi

ÖZET: Bu çalışmada farklı yapı ve özellikte on iki adet 1x1 rib örme kumaş kullanılmıştır. Örme kumaşların hava geçirgenlikleri ölçülmüş ve mikroskop altında görüntüleri alınmıştır. Görsellerin MATLAB paket programında görüntü işleme teknikleriyle görüntü doku parametreleri analiz edilmiştir. Kumaş gözenekliliği ile ilgili sekiz farklı görüntü doku parametresi ve hava geçirgenliği arasındaki ilişki korelasyon analizi ile istatistiki olarak incelenmiştir. Aynı hammaddeden üretilmiş kumaşlarda kumaş gözenekliliği parametreleri ile hava geçirgenliği arasında güçlü bir ilişki bulunmuştur. Ancak farklı hammaddeler kullanıldığında bu güçlü ilişkinin azaldığı gözlenmiştir. Örme kumaşların hava geçirgenliği üzerinde iplik ve kumaş gözenekliliğine ek olarak lif özellikleri ve karışım oranının da etkileri tespit edilmiştir.

Investigation of the Relationship Between Porosity of Knitted Fabrics and Air Permeability

ABSTRACT: In this study, twelve 1x1 rib knitted fabrics containing different structure and features were used. Air permeability of knitted fabrics was measured and their images were taken under a microscope. Textural properties of images were analyzed with image processing techniques in MATLAB package program. The relationship between air permeability and eight different textural parameters of images related to fabric porosity were analyzed statistically with correlation analysis. A strong relationship was found between fabric porosity parameters and air permeability in fabrics produced from the same raw material. However, it was observed that this strong relationship decreased when different raw materials were preferred. The effects of fiber properties and blending ratio were determined on the air permeability of knitted fabrics in addition to yarn and fabric porosity.

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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.

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Objective Measurement of Pilling Resistance in Knitted Fabrics with Image Processing Techniques

In the textile industry, measurement techniques based on image processing principles prepare to take over subjective evalution.

In this study, MATLAB software was used to evaluate pilling of knitted fabrics as objective. Knitted fabric images were taken in the cycles of 1000, 2000, 3000, 5000 and 7000.

Fabric’s surface digitization, pills detection and segmentation were carried out from these images.

Texture analysis was performed with Gray Level Co-occurrence Matrix (GLCM). After this phase, pill quantizations were made using images in matrix format obtained from image processing studies.

Standart deviation, entropy and mean of matrix elements, pill count, pill area and contrast values increased with the increase of rubbing cycles applied on the fabric.

Furthermore, the increase of rubbing cycles caused decrease in energy and homogeneity.

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Effect of Microfilament Yarns on The Performance Properties of Denim Fabrics

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.

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A Study on Usage of Chenille Yarn in Denim Fabric Production

Producers benefit from various applications to increase the usage of denim for the winter seasons.

However, the current applications have negative effects on clothing comfort.

In this study, availability of chenille yarn, which is a type of fancy yarn for denim industry, has been examined by improving aforementioned clothing comfort.

We investigated the differences between breaking strength, breaking elongation, tear strength and abrasion resistance of chenille denim and standard denim which have the same values of mass per unit area.

Consequently, in contrast to earlier findings that chenille yarns have lower abrasion resistance, this research explores unanticipated findings.

Furthermore, acceptable values in point of tear strength, breaking strength and elongation were obtained of the chenille denim.

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PET Şişe Atıklarının Tekstil Endüstrisinde Değerlendirilmesi ve Sürdürülebilirliğe Katkısı

ÖZET: Plastiklerin geri dönüşüm teknolojilerinde yaşanan gelişmeler, fiyat ve ekolojik avantajlar nedeniyle tekstil endüstrisi için yeni bir hammadde kaynağının oluşmasını sağlamıştır. Günümüzde tekstil sektöründe en fazla tüketilen  polimer olan Polietilentereftalat (PET) polimeri; çoğunlukla su, meşrubat vb. sıvı gıdaların piyasaya sürülmesi amacıyla kullanılan PET ambalajlardan geri dönüşüm tesislerinde PET talaşları olarak geri kazanılabilmektedir. PET talaşlarının eriyikten lif çekim yöntemi ile kullanılabilir life dönüşmesi de mümkündür. Bu çalışmada PET talaşlarının tekstil sektöründe kullanımı açıklanarak, Türkiye'deki PET talaş ve bu talaşlardan lif üreten işletmelerimizin durumu hakkında bilgi verilmektedir. Ayrıca Türkiye'de kurulu işletmeleri, bu alanda sahip oldukları teknolojik düzey bakımından, yurtdışındaki emsalleriyle karşılaştırma imkanı da olmuştur. Bu bağlamda, geleceğe yönelik bu alanda yapılması gereken yenilikler ve izlenmesi gereken stratejiler üzerine tavsiyelerde bulunulmaktadır.

ABSTRACT: Developments in plastics recycling enabled a new raw material for textile industry which creates economical and ecological advantages.Polyethyleneterephthalate (PET),which is the most consumed polymer in textiles recently, is recycled into PET flakes from bottles which have been used for water; oil, drinks etc. packaging. It is possible to spin fibers from melted PET flakes. In this study, usage of PET flakes in textile industry was explained. Based on this explanation, some information about the conditions of Turkish plants which produces PET flakes and fibers from these flakes were given. Moreover, Turkish recycle plants of PET fiber are compared with similar foreign plants in terms of technological background. In this context, some advices are given about developments which have to be accomplished and strategies in this field that should be followed.

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