Emel ÖNDER, Behnam POURDEYHIMI, Ömer Berk BERKALP

Suyla iğnelenmiş dokunmamış kumaşlarda yüzey görünümünün gelişimi

Kısa bir süre önce eş-oluşum(co-occurrence) temeline dayanan bir görünüm analiz metoduyla ilgili bir makalemizi sunduk. Bu makalemizde de aynı görünüm analiz metodunu kullanılarak, suyla iğnelenmiş (dolaştırılmış) dokunmamış kumaşlardaki yüzey görünümünün işlem parametrelerine bağlı olarak gelişimini inceleyeceğiz. Görünümdeki değişimi suyla iğneleme enerjisiyle ilişkilendirerek verilerimizi değerlendireceğiz, işlem enerjisi, makinadaki basınç değişimi ve geçiş sayısına göre kontrol edilmiş, tüm kumaşlar aynı tül ve aynı destek bandı üzerinde üretilmiştir. Verilerimiz bize, yüzey belirginliğinin basınç ile doğru orantılı olarak belli bir değere kadar iyileştiğim ve daha sonra ise görünümün bozulduğunu göstermiştir.

Texture development in hydroentagled nonwovens

The intention of this research is'to develop an optical method and a turnkey imaging system for classifying texture in hydroentangled nonwovens. This paper uses this texture analysis method to examine the development of the texture during hydroentangling as a function process conditions. We report on the development of texture as a function of hydroentangling energy. Energy was varied by controlling the pressure and number of passes. 1.7 dtex PET was selected as the fiber. A pilot-scale Honeycomb hydroentangling machine was used to produce fabrics under varying pressures and number of passes. All fabrics were produced using the same web on the same forming belt substrate. Our data indicated that co-occurrence analysis is a good indicator for determining the surface texture properties. We have demonstrated that horizontal and vertical contrast functions and their respective power spectral analysis data will provide a useful tool for quantifying texture. We have also showed that hydroentangling pressure has a marked effect on the manner in which texture develops during the process. In general, increasing pressure and the number of passes will result in a better texture definition up to a certain point provided that the web is sufficiently consolidated. If the web is not consolidated, higher pressures will result in perturbing the web with a concomitantly lower texture definition.

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