Sensory evaluation of tactile properties of fabrics is a subject many researchers have studied for years and which still has importance and is also open to improvements. Particularly for suitings, the sensory evaluation of fabric handle or of other tactile properties has a greater importance. This article explains sensory evaluation techniques for stiffness, thickness and smoothness, which are the components of fabric handle of suitings. These sensory techniques are introduced by the authors and studied in 100% worsted wool suitings. The concordances of sensory test results are investigated by Kendall's concordance test, and correlation analyses are carried out to examine the relations between sensory results.
The biodegradation of fabrics of various types of fibres: cotton (CO), viscose (CV), Modal (CMD), Tencel (CLY), polylactic acid (PLA), polyethylene teraphtalate (PET) and polyacrylonitrile (PAN)) under the attack of microorganisms were studied using the soil burial method for two different burial intervals (1 month and 4 months). As opposed to previous studies, all analyses were simultaneously conducted for both of the buried fabrics and soil samples so as to examine the biodegradation and environmental effect as a whole in the same study. Visual observations, weight losses, fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to examine the biodegradation behaviour. The total organic carbon (TOC), the total number of bacteria and the total number of fungi in the soil samples were studied to understand the soil content during the degradation of the fibres. The study revealed that the cellulosic fabric samples changed both physically and chemically even after 1 month. Among the cellulosic fibres, weight losses of modal, cotton, and viscose fabrics were close to 90%, showing high degradation, whereas Tencel fibre had the lowest with 60% for a 4 month burial interval. Within the synthetic fabrics, only PLA fabric lost weight.
In this study, objective and subjective evaluations of fabrics were made to predict fabric handle in a simple way. The aim of this research was to select a suitable form of regression model and predict total handle value with a minimum number of parameters to make a practical approach by using simple laboratory measurements. For this purpose, a wide database of 71 worsted men's suitings was prepared by making subjective and objective evaluations. Subjective tests of primary handle attributes (softness-stiffness, thickness-thinness, and roughness-smoothness) and total handle were evaluated by an expert jury consisting of 18 members, and a subjective total handle value was also calculated using these data. Objective measurements consisted of fabric tensile, bending, shear, compression and surface properties, and pulling through a nozzle tests. A new surface roughness tester was used for measuring surface properties, and it was found that these roughness results might be useful for fabric handle prediction. Linear and log linear regression equations were tested by using 43 parameters. Consequently, some simple regression equations that were practical solutions were obtained to predict fabric handle. A very good result was obtained with a value of the adjusted R2 = 0.88 with eight parameters (LOGP1, LOGB, T42, RΔq1, Rp2, Rq1, Rpmean, P1) from four different property blocks (pulling through a nozzle, bending, tensile, and surface), and in particular, the regression equations reaching an adjusted R2 value over 0.80 are recommended.
PurposeThe purpose of this paper is to examine the effects of coating process parameters (base fabric, coating material, coating technique and production parameters) on mechanical properties of coated fabrics.Design/methodology/approachIn this research, 24 coated fabrics were produced under controlled production conditions by using two cotton base fabrics and two coating materials as polyurethane (PU), PU/silicone in order to study how coating affects some of the base fabric's mechanical properties such as breaking strength, breaking elongation, tear strength, bursting strength, bending rigidity and abrasion resistance. The measured data were evaluated with variance analysis to determine the effects of the coating parameters at 95 per cent confidence level.FindingsBreaking strength shows increments for almost all fabrics, whereas breaking elongation values decreased by coating application. Coating has a very clear influence on tear strength of coated fabrics due to the penetration of coating material into the fabric structure. Changes in bursting strength are not similar for two base fabrics with systematically changed production parameters. Coating improves all measured parameters of bending rigidity. Coating application enhances abrasion resistance though some broken fibers are observed on the fabric surface in scanning electron microscopy investigation.Originality/valueIn the past few years, the researches on this area focused on investigating the effects of coating materials and layers on tensile properties. This study comprehensively examines the effects of several coating parameters on mechanical properties such as breaking strength, breaking elongation, tear strength, bursting strength, bending rigidity and abrasion resistance.
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