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EN
This study attempted to fabricate heating fabrics using thin-film solar cells. A lightweight and flexible thin-film solar cell was used as the power supply, and fabric samples made of carbon fiber heating lines were used as heating elements. Single-factor experiments of three factors (solar cell voltage, heating time, and carbon fiber heating line arrangement) were conducted, and their influence on the heating effect was analysed. Orthogonal experiments and variance tests were used to determine the influence of the three factors and the optimal heating process. All influential factors were shown to be statistically significant. This kind of heating fabric can be used in warm clothing or for heated clothing.
EN
The paper investigates the effects of weave structure and fabric thread density on the comfort and mechanical properties of various test fabrics woven from polyester/cotton yarns. Three different weave structures, that is, 1/1 plain, 2/1 twill and 3/1 twill, and three different fabric densities were taken as input variables whereas air permeability, overall moisture management capacity, tensile strength and tear strength of fabrics were taken as response variables and a comparison is made of the effect of weave structure and fabric density on the response variables. The results of fabric samples were analysed in Minitab statistical software. The coefficients of determinations (R-sq values) of the regression equations show a good predictive ability of the developed statistical models. The findings of the study may be helpful in deciding appropriate manufacturing specifications of woven fabrics to attain specific comfort and mechanical properties.
3
Content available remote Tensile Property and Fatigue Behaviour of Warp Knitted Fabrics
EN
Several two fully threaded guide bar warp knitted structures with three different course densities (cpc) were knitted from polyester textured yarns, and their tensile properties and fatigue behavior were investigated. Tensile tests were applied to determine the tensile behaviour of the fabrics and obtain the parameters controlling fatigue behaviour. A number of cycle amplitudes, such as 2, 4, 6, 8, 10 and 12 mm, were applied in fatigue tests. The existence space for yarn movement and the length of the underlaps were considered as structural parameters influencing the corresponding mechanical behaviour. The results show that with an increase in the underlap length, the breaking strain decreases, and the breaking strain in fabrics with a longer underlap in the front guide bar is more than those with the same underlap length in the back guide bar. There is no meaningful relationship between cpc and breaking stress. Repeated extension causes stress relaxation and secondary creep and subsequent strain softening in warp knitted structures. The cyclically stabilised stress of fabrics was increased by raising the amplitude of extension and/or by increasing the length of the underlap. Also the cyclic stabilised stress of fabrics with a longer underlap in the back guide bar was higher than those with the same length of the underlap in the front guide bar. There is no distinguished trend between the cyclic stabilised stress and cpc of fabrics.
PL
Wykonano szereg dzianin z teksturowanej przędzy PES za pomocą maszyny z dwoma w pełni nawleczonymi grzebieniami igielnicowymi z różną gęstością rządkową a następnie badano ich właściwości wytrzymałościowe i zachowanie się przy użytkowaniu. Przy testach zużycia stosowano cykle obciążenia o amplitudach 2, 4, 6, 8, 10 i 12 mm. Jako parametry strukturalne determinujące parametry mechaniczne dzianiny uwzględniono istniejące przestrzenie dla ruchu włókna oraz długość rzutu grzebieni igielnicowych za igłami. Na podstawie wykonanych badań opisano szczegółowo zależności pomiędzy poszczególnymi parametrami.
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