Abstract
Wearing clothes is an intermediate channel by exchange of air released from human bodies and environments to bring breathing stability and to control body temperature. Air permeability is an expression describing the properties of a fabric that permit the passage of air through the fabric’s interstices. It has been found that there are many factors that can affect the air permeability of a fabric comfort. Several early studies of air permeability of different materials showed that different factors affect air permeability and breathability of fabrics, and some of them are imperfections of yarns (thick, thin, and nep place) which are introduced on the surface of the fabric that originated from the appearance of the yarn. In this experiment, the yarn and fabric samples are collected from five different spinning mills which have an identical warp yarn linear density of 20 Ne regardless of the weft linear density, and the fabric was constructed from those selected yarns by using the thread set of 28 ends per centimeter and 20 picks per centimeter. The experiment was conducted by measuring the imperfection of each code of yarn on USTER statistics and air permeability of the fabric with respect to the thin, thick, and nep place/km of the yarn and fabric cover. The impacts of each factor were analyzed, and the relationships of each parameter were stated on the graph. The results were discussed by using the design of the experiment by quadratic and linear models to the response of air permeability and fabric cover, respectively, and the results showed that there is a direct impact of thin, thick, and neps of the yarn on the ability of the fabric to permeate air.
Highlights
Clothes are used to maintain and protect body temperature
Materials. e woven fabric is constructed from the rotor yarn which has the warp density of 28 ends/cm, and the weft density is 20 picks/cm. e fabric is produced from different codes of yarn (Codes A, B, C, D, and E) with a similar linear density and thread set
Results and Discussion e USTER statistics of each yarn of irregularity (U%), coefficient of variation in mass (CVm%), thin places/km (− 50%), thick places/km (+50%), neps/km (+280%), and hairiness are measured as illustrated in Table 2, and it has a different value of each yarn at the level of imperfection
Summary
In order to balance high heat that surrounds the body, garment permits sweat to evaporate (cooling off by perspiration). When humans are under high temperatures or do physical exercises, the fluctuation of fabric during movement creates air streams, which increase perspiration and cooling off. Body temperature is kept cold by the fabric layer that provides insulation a little. For these reasons, clothing comfort is of great importance from the point of a user. Clothing comfort can be examined in three different categories such as psychological, handle, and thermal comfort. Psychological comfort can be explained with the user influenced by the fashion and culture. Ermal comfort is a phenomenon, which is close to thermal and liquid or air permeability properties of fabrics [1]. Fabric handle is defined basically as the feeling when the thumb and index finger touch the fabric. ermal comfort is a phenomenon, which is close to thermal and liquid or air permeability properties of fabrics [1]. e human body produces moisture in the form of perspiration; it should be removed from to the surface of the skin and from the inside of the fabric surface
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