Person: BECERİR, BEHÇET
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BECERİR
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BEHÇET
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Publication Technology management in textile mills through optimization(Technical Univ Crete, 2003-01-01) Rusu, C; İskender, M. A.; Becerir, B.; BECERİR, BEHÇET; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; Rusu, C; 0000-0002-2655-2773; AAH-1445-2021Decision - making is an important part of technology management in the textile industry because of the quickly changing consumer demands. Optimization can be considered as one of the major quantitative tools in decision - making. Many problems are associated in the design, operation and productivity of textile mills under the force of increasing competition. These can be resolved only by applying optimization procedures. Optimization can take place at many levels and in many procedures in a textile company from the material supply to the delivery of the goods to the customer. Optimization problems can be found in management, in operations or in equipment A coordination of these levels is necessary for the technological management in the mill.Publication Effects of fiber cross-sectional shapes on tensile and tearing properties of polyester woven fabrics(Ege Üniversitesi, 2015-10-01) Karaca, Esra; Ömeroğlu, Sunay; Becerir, Behçet; KARACA, ESRA; ÖMEROĞLU, SUNAY; BECERİR, BEHÇET; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0003-1777-3977; 0000-0002-2655-2773; AAH-1445-2021; AAM-7071-2020; AAS-8480-2020Breaking load and elongation, and tearing load properties of two type fabrics (plain and twill) woven from polyester fibers having round, hollow round, trilobal and hollow trilobal cross-sectional shapes were investigated. The fabrics produced from full fibers had higher breaking elongation and tearing load values but generally lower breaking load values than the fabrics produced from hollow fibers. The highest breaking load value was obtained in twill fabric woven from filaments having hollow round cross-sectional shape, while the highest tearing load value was obtained in twill fabric woven from filaments having round cross-sectional shape. The fabrics constituting filaments with round cross-sectional shapes had the highest breaking elongation values It was concluded that the effect of fiber cross-sectional shape on breaking strength and on tearing strength differed from each other.Publication Assessing the effect of measurement parameters on surface roughness values of polyester woven fabric structures(Ege Üniversitesi, 2015-01-01) Akgün, Mine; Becerir, Behçet; Alpay, Halil Rıfat; AKGÜN, MİNE; BECERİR, BEHÇET; Alpay, Halil Rıfat; Uludağ Üniversitesi/Mühendislik Fakültesi; 0000-0002-2655-2773; AAG-9756-2021; AAH-1445-2021; CBU-3381-2022; ENF-8870-2022This paper focused on the determination of the accurate measurement parameters of surface roughness of woven fabric structures. Surface roughness measurements were conducted on plain, twill and satin fabric samples woven with the same yarns in warp and weft directions with the same yarn densities in sub-groups. Roughness parameter of arithmetic average height (mean height) (Ra) was measured in the directions of warp, weft and diagonal (45o to the crossing axis of warp and weft) on front and back sides of fabric samples. It was concluded that surface roughness properties of woven fabrics changed considerably according to measurement parameters because of the anisotropic structure of fabric surfaces. Additional parameters which enable the characterization of surface roughness could be researched and determined with regard to fabric constructional parameters.Publication Investigation of mordant application in reactive dyeing of nylon fabrics(Sage Publications, 2023-03-01) Yılmaz, Güzin Akyol; Becerir, Behçet; Yılmaz, Güzin Akyol; BECERİR, BEHÇET; Bursa Uludağ Üniversitesi/Fen Bilimleri Enstitüsü; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü; 0000-0002-2655-2773; AAH-1445-2021Nylon fibers were the first synthetic fibers to be produced on an industrial scale, and they are one of the most consumed synthetic fibers due to their visual and usage properties. Reactive dyes have been commercially produced since the mid-20th century, and they are mostly preferred in dyeing cellulosic fibers. The most important property of reactive dyes is their ability to make covalent bonds within the fiber. Mordants are used mainly in the application of natural dyes to hold and retain the dye molecules in the fiber. In this paper, nylon fabrics were dyed with three reactive dyes having different reactive groups (monochlorotiazine, trifluoropyrimidine and monochlorotriazine/vinylsulfone) in the presence of three chemical mordants (iron (II) sulfate, potassium aluminum sulfate and tannic acid) to obtain better exhaustion and coloration properties. Pre-mordanting, meta-mordanting, and post-mordanting processes were used for dyeing. The dyeings were performed at two dyeing concentrations (0.5% and 2% owf), and at three pH levels (pH 2, 4, and 6). The percentage of dyebath exhaustion (%E), the percentage fixation of the dye which exhausted (%F) and the overall percentage fixation (%T) were calculated after pyridine extraction. Wash and light fastness tests were applied on the dyed samples. The results were discussed via %E, %T and CIELAB color differences (Delta E-ab*). The results revealed that mordant usage improved the coloration properties of reactive dyes on nylon fabrics. The %E and %T results changed according to the independent variations of pH level, mordant chemical and mordanting method. The correct pH level and mordanting method gave the best dyeing and fastness results for the dyes under test.Publication Usage of proportions method for predicting percentage reflectance of woven structures in fabric design(Natl Inst Science Communication-niscair, 2015-09-01) Akgün, Mine; Becerir, Behçet; Alpay, Halil Rıfat; AKGÜN, MİNE; BECERİR, BEHÇET; Alpay, Halil Rıfat; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği; 0000-0002-2655-2773; AAH-1445-2021; AAG-9756-2021; CBU-3381-2022; ENF-8870-2022Effects of fabric constructional parameters on the prediction of percentage reflectance of woven polyester fabrics for different weft yarn densities have been investigated considering the same yarn count and weave pattern. Relationship among weft yarn density, fabric bulk density, fabric cover factor and percentage reflectance has been studied using the proportions method. The relationship between measured and proportionally predicted percentage reflectance values shows that proportional prediction method, according to fabric cover factors and using the same yarn count and the weave pattern but different yarn densities, gives the closest results to the measured ones. This could be used in estimation of fabric percentage reflectance for fabric design. Fabrics with different constructional parameters but having the same percentage reflectance could be produced by using proportions method under the conditions when appropriate beginning parameters are selected along with the fabric cover factors.Publication Assessing color properties of reactive dyed cotton fabrics after different sequential fastness test procedures(Korean Fiber Soc, 2019-07-01) Becerir, Behçet; BECERİR, BEHÇET; Yürük, Neslihan; Mangut, Mürüvvet; MANGUT, MÜRÜVVET; Bursa Uludağ Üniversitesi/İnegöl Meslek Yüksekokulu.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0002-2655-2773; AAH-1445-2021This paper focused on a novel approach for fastness testing. The changes in color properties of reactive dyed cotton fabrics after different sequential fastness test procedures were investigated. Three different cotton fabrics were dyed with four reactive dyes that were marketed as high light-fast dyes. Light, wash, and hot-pressing fastness tests were applied to dyed fabrics in three different sequential test procedures. The lightness (L*), chroma (C*), and color difference (Delta E*) values were discussed according to the different fastness tests which were applied in different orders. The results showed that the sequence of the fastness tests used changed the color properties of the fabrics in different ways. The final color of the dyed fabric samples was studied by examining the effect of different tests on the same experimental sample. A new methodology for applying sequential fastness tests rather than applying single independent tests was discussed.Publication Effects of yarn twist levels on percentage reflectance of cotton fabrics woven with various constructional parameters(Amer Assoc Textile Chemists Colorists-aatcc, 2015-01-01) Ömeroğlu, Sunay; Akgün, Mine; Becerir, Behçet; ÖMEROĞLU, SUNAY; AKGÜN, MİNE; BECERİR, BEHÇET; Uludağ Üniversitesi; 0000-0002-2655-2773; 0000-0002-1618-6562; AAG-9756-2021; AAM-7071-2020; AAH-1445-2021Percentage reflectance of plain, twill, and sateen fabrics woven from cotton yarns having various yarn counts and twist levels were presented. Yarn hairiness, fabric thickness, and fabric bulk density that changed with different twist levels were assessed with fabric percentage reflectance. All measured values changed between samples according to yarn twist levels in different ways. Percentage reflectance of fabric samples increased until yarns reached a certain twist level, then decreased with further yarn twist increases. This relationship between fabric percentage reflectance and yarn twist levels was more readily observed in less compact fabrics (fabrics having a low fabric cover factor, low fabric bulk density, and low yarn intersection numbers). Fabric bulk densities and fabric thickness values changed in accordance with yarn twist levels and fabric percentage reflectance.Publication Dependence of colour difference formulae on regular changes of colour coordinates in cielab colour space(Inst Natl Cercetare-dezvoltare Textile Pielarie-bucuresti, 2019-01-01) Çinko, Onur Uğur; Becerir, Behçet; BECERİR, BEHÇET; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0002-2655-2773; KII-5931-2024; AAH-1445-2021Four colour difference formulae [CIELAB (1976), CMC (2:1), CIE94 (2:1:1) and CIEDE2000 (2:1:1)] were assessed in CIELAB colour space for regular changes in colour coordinates. L*, a* and b* coordinates were changed regularly both as increasing and decreasing steps in different lightness and hue regions of the colour space. The dependence and consistency of the four formulae were researched depending on regular and constant colour coordinate changes. The aim of the empirical study was to determine if there could be a possibility of using different colour difference formulae in different hue regions of CIELAB colour space; in the region of bulk that each formula would give the best fitting and the most reliable results. The empirical study was carried out by using a special software which was prepared for the purpose. The results showed that CIELAB and CIE94 gave corresponding results with each other in the computing ranges. All the formulae showed different computing characteristics in the computation ranges. CMC formula gave the highest colour differences when computing near the grey point. It was concluded that CIEDE2000 formula suited itself the best according to the changes in computing steps. A more complicated software would be necessary to determine the sensitivity of the formulae by which the computing would be performed by changing all the coordinates (L*, a* and b*) at the same time.Publication Dyeing and some fastness properties of novel perlite-containing polyester woven fabrics(Sage Publications Inc, 2022-03-01) Becerir, Behcet; BECERİR, BEHÇET; ÖMEROĞLU, SUNAY; Karaca, Esra; KARACA, ESRA; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0002-2655-2773; 0000-0003-1777-3977; AAS-8480-2020; AAH-1445-2021This article is focused on the comparison of dyeing, and washing and light fastness properties of conventional and novel perlite-containing polyester woven fabrics via color measurements. All the production processes for the regular and perlite-containing polyester filament yarns were the same. The fabrics were dyed with three medium level energy disperse dyes of different hues in order to observe the shade change caused by the intrinsic yellowness of the perlite-containing fabric. Dyeing and fastness properties of the dyed fabrics were evaluated by their corresponding lightness (L*), chroma (C*), color strength (K/S), and color difference (Delta E-ab*) results. The perlite-containing fabrics showed similar dyeing and fastness characteristics when compared with the regular fabrics. The perlite-added fabrics were dyed in darker color but had lower chroma values than the regular ones. The perlite-added fabrics also had better fastness results than the regular fabrics when the evaluation was performed in the group itself. Intrinsic yellowness of perlite-added fabrics must be taken into account for any attempt to dye the fabric to a pre-designed shade.