Wyniki wyszukiwania - Biblioteka Nauki

1

Thermal Resistance of Denim Fabric under Dynamic Moist Conditions and its Investigational Confirmation

100%

Mangat M. M. , Hes L.

Fibres & Textiles in Eastern Europe

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2014

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tom Vol. 22, no. 6 (108)

101--105

EN

The goal of this study was to examine whether there is a correlation between the moisture content in fabric and the thermal resistance thereof. Denim fabric made of five different compositions of fibre content was used for testing thermal resistance under dynamic moist conditions. An ALAMBETA semi-automatic non-destructive thermal tester was used to check the thermal resistance. A mathematical equation was developed for prediction of the thermal resistance of denim fabric submersed in water at different moisture levels. This model is based on the relationship between the density ratio of the fibre and fabric, the thickness of the fabric and the amount of moisture therein. A number of simulations were tried and finally one arrangement found that has significant agreement with actual values. This model can be used for other types of fabric because there is no role of the geometry of fabric in it. The model proposed exhibits a substantial link with the experimental data.

PL

Celem badań było sprawdzenie czy istnieje korelacja pomiędzy zawartością wilgoci w tkaninie i jej opornością termiczną. Dla badań wykonano 5 tkanin o różnym składzie. Wykorzystano pół-automatyczny przyrząd ALAMBETA umożliwiający wykonywanie badań niedestrukcyjnych. W badaniach uwzględniano zależności pomiędzy gęstością włókien a gęstością tkaniny, grubością tkaniny i ilością wilgoci w niej zawartej. Przeprowadzano szereg symulacji i znaleziono możliwość korelacji z wartościami rzeczywistymi. Opracowany model można zastosować dla innych typów tkanin ponieważ nie uwzględnia on geometrii tkanin.

2

Relationship between the Physical Properties and Hand of Jean Fabric

81%

Kawamura A. , Zhu C. , Peiffer J. , Kim K. , Li Y. , Takatera M.

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tom Vol. 16, no. 3

138--145

EN

We investigated the distinctive characteristics of jean fabrics (denim fabrics obtained from jeans) and compared the physical properties and the hand. We used 13 kinds of jean fabric from commercial jeans and 26 other fabric types. The physical properties were measured using the Kawabata evaluation system, and the fabric hand was evaluated by 20 subjects using a semantic differential method. To characterise the hand of jean fabrics compared with other fabrics, we used principal component analysis and obtained three principal components. We found that jean fabrics were characterised by the second principal component, which was affected by feelings of thickness and weight. We further characterised the jean fabrics according to ‘softness & smoothness’ and ‘non-fullness’, depending on country of origin and type of manufacturer. The three principal components were analysed using multiple linear regression to characterise the components according to the physical properties. We explained the hand of fabrics including jean fabrics using its association with physical properties.

3

Comfort and Performance Properties of Raised and Laminated Denim Fabrics

72%

Sabir E. C. , Kadem F. D.

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2016

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tom Vol. 24, no. 5 (119)

88--94

EN

In this study, denim fabrics manufactured using standard processes were selected as reference fabric and subjected to mechanical and chemical finishing treatment. The effects of the two finishing treatments on the comfort and performance properties of the fabric were investigated. The test samples were the reference fabric, raised fabric and laminated fabric. The comfort tests were for fabric thickness, air permeability and water vapor permeability. The performance tests were for tensile strength, fabric stiffness, tearing strength and fastness. Colour and microscopic image analyses of the samples were also made and evaluated. Raising and lamination improved the thermal resistance properties, whereas raising increased air permeability. Evaluating the performance, fastness and colour properties of the raised and laminated fabric samples did not reveal any significantly negative outcomes. Raising can be recommended for use on the condition that seasonal variations be considered, since it creates comfortable denim fabrics with improved thermal resistance and air permeability.

PL

Badano właściwości użytkowe tkanin dżinsowych laminowanych i zmechaconych w odniesieniu do próbek takich tkanin powstałych metodą standardową. Badano grubość tkanin, przepuszczalność powietrza, przepuszczalność pary wodnej, wytrzymałość na rozciąganie i rozrywanie oraz sztywność. Niezależnie oceniano właściwości kolorystyczne oraz wygląd powierzchni. Laminowanie i zmechacenie poprawia właściwości termiczne podczas gdy jedynie zmechacenie zwiększa przepuszczalność powietrza. Nie stwierdzono wyraźnie negatywnych skutków laminowania i zmechacenia na właściwości użytkowe takich tkanin. Mechacenie może być rekomendowane do użytkowania sezonowego uwzględniając właściwości termiczne i przepuszczalność powietrza.

4

Sustainability Approach of Recycled Denim Fabrics with a Life Cycle Assessment

72%

Karagöl H. , Kadem F. D. , Olucak H. İ. , Kertmen M. , Özdemir Ş.

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tom Vol. 32, no. 2

57--63

EN

In this study, denim fabrics were produced using weft yarns obtained from mechanically recycled fibers after consumer use, and the breaking strength, tearing strength, thermal resistance, water vapor permeability, air permeability, and fabric stiffness of these fabrics were determined according to the standards. A life cycle analysis of the recycled denim fabrics was made using the SimaPro software program, and the environmental effects of the production were also revealed. Within the scope of the study, it was observed that the structural properties of the fabrics produced and the composition of recycled cotton used affect the performance and comfort properties of the fabric. The effect of the cotton recycling rate on the recycled denim fabrics was evaluated by LCA (life cycle analysis). As a result of the LCA evaluation, with the use of cotton with a high percentage of recycling additives instead of the conventional cotton, as in the reference fabric, resource depletion (fossil fuels), global warming, depletion of the ozone layer, the toxic effect on human, freshwater and terrestrial life, the total water use, and other categories were observed to undergo a significant improvement.