Gaziantep University
Anabilim Dalı

Tekstil Teknolojisi Anabilim Dalı

Gaziantep University

14

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Anabilim Dalı

14 Tez
DoktoraAçık ErişimEN

Exploring consumers' virtual garment fit satisfactions to predict their actual satisfactions

Garment fit satisfaction is a very complicated phenomena due to its numerous components and has always been a problem for clothing companies since consumers often complain about poor fitting. However, this issue became more significant due to high return rates of online shopping which is often associated with the fit of the garment. Virtual try-on technology is a useful tool to minimize fit issues encountered during and after online purchasing. Virtual try-on technology enables consumers to see and evaluate how a specific cloth would actually look on their own bodies. During a virtual try-on experience, consumers are expected to evaluate the garment fit by looking at a virtual image. This image consists of a virtual cloth created by a simulation software and a virtual model that represents consumer's body. For a life-like experience, virtual model must be an accurate and realistic simulation of consumer's body which is often attained by 3D body scanning. Occasions for the virtual try-on technology to be used for online shopping have been already discussed in academia and industry during the last decade, but these expectations have not been met due to expensive and inaccessible 3D body scanners. However, 3D body scanning technology has evolved since then. Nowadays, to scan an object, a surface or a human body, is as easy as using a mobile phone or a portable scanner. Even though, it is not yet that common, using virtual try-on technology for online shopping is now around the corner. When the virtual try-on technology is fully ready for the market, it can be possible for consumers to decide whether to buy a cloth depending on their fit satisfactions of a virtual garment. This anticipation makes virtual fit satisfaction as important as real fit satisfaction. In this dissertation, factors affecting consumers' virtual fit satisfactions were heeded and a further exploration of virtual fit satisfaction notion was pursued. The research model offered by LaBat and DeLong (1990) was the keystone when exploring the factors that affect consumers' virtual fit satisfactions. According to their research, consumers' garment fit satisfactions depend on some internal factors (directly related to the cloth and the consumer) and external factors (related to the fashion trends and beauty perception of societies and fashion industry). The model offered by LaBat and DeLong cannot be directly implemented to understand the factors that affect consumers' virtual fit satisfactions since the virtual try-on conditions are considerably different than actually wearing the cloth and assessing its actual fit. Hence, for this dissertation, these internal and external factors were modified and additional factors which are only applicable for virtual context were included. These novel factors offered in this dissertation were consumers' virtual body satisfactions, virtual try-on acceptance, 3D body scanning experience and the 3D fabric properties which are derived from actual fabric properties. The relationship between these novel factors and consumers' virtual fit satisfactions were questioned and tested by an experimental setup. Moreover, the association between consumers' virtual fit satisfactions and other xx ii factors which are also present during an actual try-on scenario, such as consumers' body measurements, product liking and online shopping attitudes were also investigated. Although virtual fit satisfaction is important and influential, it is actually a tool to ensure consumer's satisfaction with the real fit of the garment. Before the virtual tryon technology, it was almost impossible to predict whether the consumer would be satisfied with the fit of the garment or to what extend he/she would be satisfied after an online purchase. In this study, consumer's virtual fit satisfaction was sought as a useful tool to predict consumer's actual fit satisfaction by incorporating internal factors (consumers' body measurements, body satisfactions and fabric properties). Ultimately, in this dissertation, a research model to predict consumers' real fit satisfactions was offered, experimentally measured, and statistically tested. Garment fit satisfaction is highly subjective since personal preferences are involved. People may like or dislike the fit of a garment due to its design that consists of its silhouette, line, color and texture (or fabric). In this study, the impact of fabric properties on consumers' fit satisfactions was particularly investigated. To do that, other design elements (silhouette, line and color) were fixed, and only fabrics have been altered. Eventually, fourteen woven fabrics were collected, and their critical properties (thickness, weight, bending rigidity, shear rigidity, elongation, drape coefficient, surface friction and roughness) were measured by various testing instruments. Afterwards, fabrics were statistically clustered into four groups according to their measured fabric properties. Following this objective clustering, seven of the fabrics were extracted due to their subjective alikeness to the other fabrics within the same cluster. Finally, seven circular skirts which have the same color (black) and same measurements (medium size), but different woven fabrics were produced by a professional seamstress. For the garment fit experiments, forty-five medium size subjects were recruited in Cornell University. Subjects' body satisfactions, product likenesses, online shopping attitudes were measured by an online survey. Then, each subject was 3D body scanned with their underwear, and their 3D body scans were exported to a commercial 3D garment simulation software to be assigned as virtual models during virtual try-on. After 3D body scanning, each subject tried on four different skirts (one skirt from each cluster) and evaluated their actual fits. Subjects also saw the simulation of each skirt before wearing and evaluated their virtual fit on their own avatar. By doing so, subjects were intended to have an ideal virtual try-on experience during an online shopping scenario. At the end of the experiments, subjects' i virtual fit technologies used throughout the experiments (3D body scanner and virtual try-on) were measured. Collected data was analyzed by using SPSS v.25 statistical software. The first objective of this research was to investigate the factors affecting the virtual fit satisfactions of the consumers. Pearson's correlation test was conducted to explore the correlation between subjects' virtual fit satisfactions and; body measurements, virtual body satisfactions, liking of the cloth design, interaction with virtual fit technologies, attitudes toward product type, and 3D fabric properties. The strongest correlation of subjects' virtual fit satisfactions was found with their virtual body satisfactions at hips level (r (180) = .50). It was followed by their belly, hip-thigh and waist measurements (r (180) = -. 34, -. 29,-.28, respectively), and finally their liking of the cloth design (r (180) = .33). A weak correlation was found between consumers' virtual fit satisfactions and their interaction with 3D body scanner and virtual try-on technology (r (180) = .26 xx iii and .24, respectively) (All correlations were significant at p=0.01 level). On the other hand, no significant correlation was found between consumers' virtual fit satisfactions and 3D fabric properties. The second objective of the study was to develop a statistical model to predict consumers' real fit satisfactions and to test its validity. In this study, various skirts were fitted on numerous subjects hence, it was appropriate to use multilevel linear regression instead of simple regression. Therefore, a multilevel linear model (MLM) with maximum likelihood estimation was developed. Subjects' real garment fit satisfaction was assigned as dependent variable; and subjects' body measurements, body satisfactions, virtual fit satisfactions, and fabric properties were assigned as predictor variables. The results of the analysis showed that subjects' virtual fit satisfaction was the strongest predictor of their real fit satisfaction (F (1, 80.72) = 55.00, p< .01, β= 0.54). The second-best predictor was fabrics' bending rigidity in weft direction (F (1, 155.26) = 13.33, p< 0.01, β = - 0.37). Subjects' waist height and overall body satisfactions were also significant to predict their real fit satisfactions (F (1, 37.67) =6.23, p< 0.01, β=0.28, F (1, 41.58) =5.71, p< 0.05, β= 0.24, respectively). Ultimatly, subjects' real fit satisfactions were predicted by the developed MLM by using their virtual fit satisfactions, body measurements, body satisfactions and fabric properties. According to the results, subjects' real fit satisfactions and their predicted fit satisfactions were strongly correlated (r (180) = .775, p < .01). Furthermore, cross validation was established to test the efficacy of the developed prediction model. For cross validation, collected data were partitioned into two groups randomly. 80 percent (N=148) of the data were used for training the model and 20 percent (N=32) were used for testing. A linear regression equation was obtained by running the developed MLM with the training data. Afterwards, obtained regression equation was used to predict subjects' real fit satisfactions in the preserved test data. According to the crossvalidation, the predicted and actually measured real fit satisfactions were strongly correlated (r(32)= .83, p< 0.01). In addition to correlation analysis, a paired t-test was conducted between subjects predicted and actually measured real fit satisfactions. According to the paired t-test results, no significant difference was found between these two groups (t(1, 31)= 1.86, d=.23, p= 0.073). The correlation and paired t-test analysis are strong indicators that the developed MLM works well to predict consumers' real fit satisfactions. Another objective of this study was to compare consumers' real and virtual fit satisfactions. The correlation between subjects' real and virtual garment fit satisfactions were explored by Pearson's correlation test and the means were compared by paired t-test. The results showed that subjects' real and virtual garment fit satisfactions were highly correlated (r (180) = .63, p< 0.01). Even though the correlation was high, a significant difference between subjects' real and virtual fit satisfactions were detected for some of the skirts particularly. This brings an answer to the final objective of the study which was to understand how different fabrics affect consumers' garment fit satisfactions in real and virtual context. The results showed that whilst consumers' grasp the fabric related fit alterations in real context, they do not perceive it in virtual context. Finally, the decline of subjects' body satisfaction level after being exposed to their 3D body scan images was also notable. This decrease was remarkable especially for waist and hips area. xx iv In this dissertation, garment simulation technology was used to create an online purchasing scenario. Moreover, consumers' garment fit satisfactions were measured with respect to the subjectivism of the garment fit whereas literature often adopt an objective approach. Factors affecting the virtual fit satisfaction of consumers were empirically explored, and a statistical model to predict consumers' real fit satisfactions were successfully developed by incorporating their virtual fit satisfactions. The research methodology used in this dissertation study can be used to predict consumers' real fit satisfactions for other cloth types or styles by adjusting variables, and consequently increase online shopping and reduce garment returns related to fit issues.

Evrim Büyükaslan
İstanbul Technical University · Fen Bilimleri Enstitüsü
2018
00
Yüksek LisansAçık ErişimTR

Elektrolif çekim yöntemi ile elde edilmiş fotokromik nanolifler

Bu çalışmanın amacı sensör kullanım alanına temel oluşturacak fotokromik boya içeren nanolif yüzeylerin elektrolif çekim yöntemi kullanılarak elde edilmesi ve elde edilen bu yüzeylerin morfolojik ve renk açısından değerlendirilmesidir. Bu amaçla öncelikle farklı konsantrasyonlarda termoplastik poliüretan kullanılarak nanolif yüzeyler üretilmiştir. En uygun termoplastik poliüretan konsantrasyonu belirlendikten sonra lif çekim çözeltisine farklı konsantrasyonlarda fotokromik boya ilave edilmiştir. Bu kapsamda çözücü olarak dimetilformamid ve dimetilformamid:diklormetan karışımı kullanılmıştır. Elde edilen fotokromik nanolif yüzeylerin morfolojik ve renk özellikleri değerlendirilmiştir. Nanolif yüzeylerin mikroskop görüntüleri incelendiğinde düzgün nanolif yapılarının oluştuğu görülmüştür. Ultraviyole ışık etkisi ile nanolif yüzeylerin renk değiştirme özellikleri incelendiğinde, renklenmenin fotokromik boya konsantrasyonu ile ilişkili olmadığı görülmüştür.

Simge Alır
Ege University · Fen Bilimleri Enstitüsü
2018
00
Yüksek LisansAçık ErişimTR

Kapitone örme kumaş yapılarından konforlu uyku sistemlerinin geliştirilmesi

İnsan ömrünün yaklaşık olarak üçte birini uykuda geçirir. Vücudumuzun dinlenmesi ve beynimizin mola verebilmesi için uyku gerekli olan bir döngüdür. Uyku fizyolojik bir ihtiyaçtır. Ancak her insanın fizyolojisi değişim gösterir ve buna bağlı olarak kişilerin uykuda harcadıkları zaman da değişir. Kaliteli bir uyku için uyku sürecindeki vücut konforu oldukça önemlidir. İnsan vücudu ile çevre arasındaki fizyolojik, psikolojik ve fiziksel uyum olarak tanımlanan konforun en önemli bileşeni ise ısıl konfordur. Bu çalışma kapsamında, konfor özellikleri iyileştirilmiş uyku sistemlerinin geliştirilmesi amacıyla çeşitli kapitone örme kumaşların fiziksel (gramaj, kalınlık ve kumaş yoğunluğu), ısıl konfor (hava geçirgenliği, su buharı geçirgenliği ve ısıl direnç) ve performans (basınç dağılımı ve sıkıştırılabilirlik) özellikleri incelenmiştir. Elde edilen sonuçlar istatistiksel olarak analiz edilmiş ve karşılaştırmalı olarak değerlendirilmiştir. Ayrıca, yatak yüzünde yaygın olarak kullanılan farklı kumaş yapıları tanıtılmış, yatak ve yatak kumaşı üreticilerinin kullandıkları son teknolojiler irdelenmiş ve bu yapılardan beklentiler ortaya konmuştur. Değerlendirilmesi yapılan numunelerde, ısıl konfor parametreleri ve performans özelliklerine en çok etki eden özelliklerin kalınlık ve kumaş yoğunluğu olduğu gözlemlenmiştir. Bu durumda, en iyi performansı sağlayan kumaşların ince ve yoğunluğu yüksek olan kumaşlar olarak bulunmuştur.

Hüseyin Mahli
Ege University · Fen Bilimleri Enstitüsü
2018
00
DoktoraAçık ErişimTR

Kabartma desenli örme kumaşların fiziksel ve ısıl konfor özellikleri üzerine bir araştırma

Günümüzde yaşam kalitesinin giderek önem kazanması ve tüketicilerin bilinçlenmesiyle birlikte, giysilerden beklenen özellikler artmış; vücut hareketi konforu ve estetik konforun yanı sıra giysilerin ısıl konfor sağlaması aranan özellikler arasında sayılmaya başlanmıştır. Son yıllarda teknik tekstillerden sonra üzerinde en fazla çalışılan konu giysi konforudur. Örme kumaşların daha yaygın olarak kullanılması ile örme yapılarında yeni desenler yaratma ve farklı ilmek yapıları kullanarak çeşitliliği artırma çalışmaları da artmıştır. Bu amaçla, ilmek oluşumu sırasında, iğnelerin yükselme miktarını değiştirerek elde edilen atlama ve askı gibi yapılar çok yaygın olarak kullanılmaktadır. Temel örgü türevlerinden olan ve askı veya atlama yapılarının tekrarlı olarak kullanılmasıyla elde edilen çift katlı pike yapıları, temel örgülere göre daha farklı fiziksel ve konfor özelliklerine sahiptirler. Kalınlığı nedeniyle üç boyutlu olarak da nitelenen bu yapılar hakkında yapılan araştırmalar giderek artmaktadır. Bu çalışmada, çift katlı pike örgü grubunda yer alan ön yüzeyi kabarık görünümlü kumaşlar ile ilgili kapsamlı bir çalışma yapılmıştır. Çalışmanın ilk adımında, yuvarlak örme makinelerinde rapor büyüklükleri değiştirilerek ve farklı üretim parametreleri kullanılarak Ottoman ve Kapitone kumaşlar üretilmiştir. İkinci adımda ise üretilen kumaşların fiziksel ve ısıl konfor özellikleri ayrıntılı bir şekilde incelenmiş ve optimum konfor ve performans özelliklerine sahip kumaş tipleri ortaya konulmaya çalışılmıştır.

Sadaf Abbası
Ege University · Fen Bilimleri Enstitüsü
2017
00
Yüksek LisansAçık ErişimTR

İki katlı dokuma kumaşlarda kumaş konstrüksiyonunun kumaşın mekanik özelliklerine etkisi

Bu tez çalışması kapsamında, iki katlı yapılarda kumaş konstrüksiyonunun kumaşın performans özelliklerine etkisini inceleyebilmek için farklı konstrüksiyonlarda iki katlı dokuma kumaşlar üretilmiştir. Kumaşlar; çözgü ipliği numarası, cinsi ve sıklığı aynı fakat atkı ipliği cinsi, üst katının örgüsü ve iki kat arasındaki bağlantı şekli farklı olacak şekilde armürlü dokuma makinesinde dokunmuştur. Elde edilen kumaş numunelerinin kopma mukavemet ve uzamaları, yırtılma mukavemetleri, dikiş mukavemetleri ve aşınma dayanımları ölçülerek sonuçlar istatistiksel olarak değerlendirilmiştir. Çalışmadan elde edilen sonuçlara göre, kullanılan atkı ipliği cinsinin, üst kata ait örgü raporunun ve iki kat arasındaki bağlantı şeklinin iki katlı kumaşların kopma mukavemeti ve kopma uzaması, yırtılma mukavemeti, aşınma dayanımı ve dikiş mukavemeti üzerinde istatistiksel olarak etkisinin olduğu gözlenmiştir.

Rezzan Akbal
Bursa Uludağ Üni̇versi̇ty · Fen Bilimleri Enstitüsü
2020
00
Yüksek LisansAçık ErişimEN

A study on insect repellency effects of bamboo 100%, soybean 100%, organic cotton 100% and cotton 100% knitted fabrics

Insect-borne diseases affect millions of people's life around the world every year. Insect repellent textiles are one of the important tools to prevent insect-borne diseases. In this study, insect repellency finish provided by permethrin-based insect repellent chemical (Konservan P10) on single jersey knitted fabrics each made of different fibers cotton 100%, organic cotton 100%, bamboo 100%, and soybean 100% respectively. The fabrics were subjected to insect repellency test based on visual observation and the results were evaluated. Insect repellency values of the fabrics were also investigated with application of chemical in different concentration. The best insect repellency effect was obtained from organic cotton among the fabrics. Furthermore, it was clarified that insect repellent fabrics obtained by application of Konservan P10 do not provide antibacterial effect.

Mehmet Digilli
Gaziantep University · Fen Bilimleri Enstitüsü
2015
00
Yüksek LisansAçık ErişimEN

Improvement of comfort properties of denim fabric after coating process

Denim, which is characterized with certain physical properties, is a generally cotton fabric produced for work and sportswear for years thanks to superior abrasion and tear resistance than other fabric types like gabardine. The importance of this sector is easily accepted when considering approximately 3,5 billion meters annual worldwide manufacture. Denim fabrics are subjected to coating to give new appearance, create new market and increase performance. However decrease in air / water vapour permeability of the fabric after coating is a disadvantage. The garments have to help obtaining thermal balance between body and environment and make consumer feel comfort by transferring, perspiration, heat and moisture. In this thesis, commonly used conventional type PU coating was made with denim samples to the laboratory and micro cracking process was applied in order to increase the breathability of the fabric. Acetone, dimethylformamide (DMF) and ethanol solvents were used for micro cracking process and fabric samples comfort (water vapor permeability, air permeability, wicking) and mechanical (tensile strength-elongation, abrasion, water repellency) parameters were measured. Analyses of variance (ANOVA) was performed in order to understand the statistical importance of solvent type, bath rate and duration time on denim fabric properties and were used to determine variations. Key Words: Clothing comfort, denim fabric, coating.

Ebru Çerçi
Gaziantep University · Fen Bilimleri Enstitüsü
2016
00
Yüksek LisansAçık ErişimEN

Performance of weft knitted fabrics from glass yarn in terms of architecture, cam setting and number of yarn ply

In recent years, weft knitting is used to produce technical textile and composite dry preforms due to their rapid, low-cost and versatile fabric manufacturing technique. Different loop formations like tuck- and skip-stitches and loop length size display variable performances for physical and mechanical properties of knitted fabrics. This study revealed the effect of cam setting and number of yarn ply onperformance of weft-knitted fabrics from glass yarn. Change in cam setting from loose to tight level increased fiber content, and stitch-density; while it decreased loop length. Fabrics knitted via tight cam setting level exhibited less air permeability, and higher bursting strength than fabrics knitted via loose cam setting. Fabrics from 3-ply yarn showed less air permeability and higher bursting strength than fabrics from 2-ply yarn. Due to their stiff and brittle nature; glass fibers can easily be broken during weft knitting process that creates broken fiber ends on the fabric surface, and deteriorates the performance of resultant fabric. The overall conclusion is that the fabrics with tuck stitches are the thickest structure and they had the highest fiber content. Number of yarn ply is not effective parameter on fabric properties as much as cam setting is. The cam setting of the knitting machine affects loop lengths that modify fabric performance at statistically significant level. Keywords: Glass yarn, weft knitted fabrics, bursting strength, air permeability, loop strength

Hilal Yıldırım
Gaziantep University · Fen Bilimleri Enstitüsü
2018
00
Yüksek LisansAçık ErişimEN

Production of aligned nanofibers using parallel electrode collectors in electrospinning method

Nanofibers that produce with the electrospinning method are conventionally collected in randomly arranged nonwoven format. In this study, it is emphasized to collect the aligned nanofibers as parallel to each other by using parallel electrode collectors. In this context, the effect of the width of collectors, gap distance, TCD and charge density parameters on the orientation of the nanofibers and their average diameter was studied for the PAN and PVA polymers. All nanofiber samples were imaged by scanning electron microscopy. The nanofiber array angles and average diameters are determined and the results were interpreted visually and statically. Optimal plate widths for alignment were observed as 15 mm and 20 mm for PAN and PVA. Optimal gap distances were observed 1 cm and 2 cm for PAN and 3 cm and 4 cm for PVA. It was resulted that these two parameters had no significant effect on the average nanofiber diameter. In addition, as the charge density and TCD increase, the alignment for both polymers is getting worse. 1 kV charge density and 9 cm TCD values are the best alignment values for both polymers.

Şirin Ceylan
Gaziantep University · Fen Bilimleri Enstitüsü
2019
00
Yüksek LisansAçık ErişimEN

Investigation of the effects of polyester yarn produced from staple fibers having different cross-sectional shape on different weaving structures

Each fiber cross-section gives a different characteristic to the yarn. By changing the fiber cross-sectional structure, studies of adding different functional properties in fibers are rapidly increasing. Examples include; such as cold-holding fibers, hot-holding fibers, anti-static fibers. With these features, the use of functional fibers developed in textile fields such as technical textiles and medical textiles is rapidly increasing. Inspired by this, in this thesis, weaving and fiber cross-section structures are changed to reveal different fabric characteristics and to create inspiration for new special fabrics in different textile areas. In this study, the performance and comfort features, water vapor permeability, abrasion resistance, drape and brightness of the fabrics woven from different cross-sectional shaped polyester fibers were examined. A total of sixteen woven fabrics were produced in four different weave patterns (plain, twill, sateen, and basket) from polyester yarns of four different fiber cross-sectional shapes (oval, scalloped oval, blending scalloped oval and hollow, hollow). Polyester yarns were produced in the same number by using fibers in different cross-sections. Fabrics were produced in different weaving structures with these yarns and fabrics woven with yarns having these different cross-sections were examined to give which characteristics on the fabric structure and fabric surface.

Ali Ibrıkcı
Gaziantep University · Fen Bilimleri Enstitüsü
2019
00
Yüksek LisansAçık ErişimEN

Antibacterial coating of fabrics with nanofibers

Textiles are in permanent contact with microorganisms, which can cause serious problems, including fabric rotting, staining, unpleasant odours and health concerns ranging from simple discomfort to physical irritation, allergic sensitization, toxic responses, infection and disease. Therefore, the control of undesirable effects of microbes on textiles is becoming an important issue in textile industry. Consumers? attitude towards hygiene and active lifestyle has created a rapidly increasing market for antibacterial textiles, which in turn has stimulated intensive research and development. Various active agents such as silvernitrate, silver nanoparticles and irgasan are used to gain antibacterial properties to fabrics. In this study, nanofibers and nanoparticles were physically bonded to the fabric surface by electrospin and electrospray coating processes. The nanofiber layer coated on fabric surface is invisible thin layer and it gives antibacterial property to the fabric. This method is more economical and ecological due to the less raw material usage and environmental friendly process (no air or water pollution). The results show that the treated fabrics, may have antibacterial activity even after several washing cycles. Electron microscopy was used to observe the antibacterial agents on the fabrics before and after washing process.Key Words: nanofiber, electrospinning, electrospraying, antibacterial agent, washing resistance.

Burcu Ademoğlu
Gaziantep University · Fen Bilimleri Enstitüsü
2011
00
Yüksek LisansAçık ErişimEN

Investigation of the some performance properties of knitted fabrics which are produced by soybean and organic cotton yarn

With increasing of life standards not only using properties but also comfort properties get important. Since the perception of comfort is something subjective, the need of ability to define comfort with measurable quantities, so as to have clear definitions.Comfort is an important aspect on textile production but it is difficult to determine an exact comfort level; however there are certain fabric properties which are known to be related with sensorial comfort hence those properties may be measured for a comfort evaluation. So, to provide comfort properties new fiber types have been developed. In this study soybean and organic cotton were selected because of their increasing attention at comfort area.Comfort is discussed in three categories: physical, psychological and physiological. In this project, physiological comfort concerned with thermal balance of human body was investigated.In this thesis work air permeability, wicking ability, water vapor permeability and thermal comfort behavior of fabrics were tested. Raw material (fiber type) and yarn count were variable in this study. Each of them was analyzed. According to test results and statistical analysis it was observed that these properties affect the comfort properties of fabric and the best yarn number were found by using these test according to raw material. The soybean and organic cotton fabric were compared according to these tests.

Air permeabilityComfortWater vapor+1
Zehra Ünal
Gaziantep University · Fen Bilimleri Enstitüsü
2010
00
Yüksek LisansAçık ErişimTR

Dokuma konfeksiyon işletmelerinde üretim parametrelerinin hesaplanması üzerine bir bilgisayar programının geliştirilmesi

Bu çalışmanın amacı, kalıp hazırlamaya ihtiyaç duymadan temel ve yardımcı vücut ölçülerinden yararlanarak kumaş birim metrajının hızlı bir şekilde hesaplanmasını sağlayacak bir yöntem geliştirerek, bilgisayar programı oluşturmaktır. Çalışmada model ölçü tablosundaki temel ve yardımcı ölçülerden yararlanarak giysiyi oluşturan parçaların alanları hesaplanmıştır. Daha sonra tüm parçaların oluşturduğu toplam alan, kumaş eni, pastal verimi, fire oranı, çekme değerleri gibi parametreler kullanılarak model birim metrajı hesaplanmıştır.Araştırmada, öncelikle literatür araştırması yapılarak konfeksiyon işletmelerinde kumaş birim metrajı hesaplama konusundaki çalışmalar incelenmiştir. Daha sonra birim metraj hesaplamak amacıyla dokuma konfeksiyon üretimi yapan bir işletmede çeşitli denim pantolon ve etek modelleri incelenerek, kalıpların alanlarını hesaplayabilen formüller geliştirilmiştir. Geliştirilen formüllerle hesaplanan alanlar ile CAD kalıp hazırlama, serileme ve pastal hazırlama sistemi tarafından hesaplanan alanlar karşılaştırılmıştır.Araştırmanın sonunda birim metraj hesaplamak amacıyla bir bilgisayar programı da geliştirilmiştir. Oluşturulan yazılım, yeni bir modelin sisteme girilmesi, modellerin girilmesiyle oluşturulan veritabanından istenilen kriterlere göre arama yapılması ve arama sonucunda daha önceden girilmiş modeller üzerinde değişiklik yaparak güncellenmiş verilerin kaydedilmesi gibi başlıca üç işleve sahiptir.

Maliyet hesabıYazılım programları
Feyza Dayanıklı
Dokuz Eylül University · Fen Bilimleri Enstitüsü
2009
00
Yüksek LisansAçık ErişimTR

Otomobil koltuk döşemeliğinde kullanılan kumaş yapılarının özellikleri

Bu çalışmada, otomobil koltuk döşemeliğinde kullanılan kumaş yapılarının fiziksel özellikleri araştırılmıştır. Öncellikle teknik tekstillerin otomobiller içersinde hangi kısımlarda kullanıldığı, bu endüstride kullanılan tekstil materyallerinin özellikleri, otomobil koltuk döşemeliklerinin teknik tekstil pazarı içersindeki yeri üzerine literatür araştırılması yapılmıştır. Çalışmanın ikinci aşamasında, otomobil koltuk döşemeliklerinin üretiminde kullanılan yeni teknolojilerin incelenmesi amacıyla, bu alanda Türkiye'nin en büyük firmalarında çalışmalar yapılmıştır. Deneysel çalışmada ise, bu firmalardan temin edilen otomobil koltuk döşemelik kumaşlara, otomobil üreticileri tarafından en çok önem verilen kopma mukavemeti, yırtılma mukavemeti, aşınma dayanımı, hava geçirgenliği ve ışık haslığı deneyleri uygulanmıştır. Tezin son aşamasında ise, deneysel çalışmada elde edilen verilerin istatistiki değerlendirilmesi yapılmıştır. Değişkenler arasında doğrusal bir korelasyonun olup olmadığını görmek için istatistiksel hipotezler test edilmiştir. Eğer bir korelasyon varsa bağımlı ve bağımsız değişkenler arasındaki ilişki belirlenmiş ve ayrıca kalitatif değişken seviyelerinin etkinlik derecesinin ne olduğu araştırılmıştır.

Gülşah Pamuk
Dokuz Eylül University · Fen Bilimleri Enstitüsü
2006
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