Textile and Fibrous Materials and Structure, Clothing Comfort, Heat transfer in textiles and clothing, Liquid moisture transfer in fibrous medium, Electrostatic properties of fibrous materials, Technical textile applications and testing, Instrumentation for Textile Testing, Modelling & Simulations
21
Scopus Publications
Scopus Publications
Electrical properties of textiles Kausik Bal Advances in Electrically Conductive Textiles Materials Characterization and Applications, 2024
A non-destructive single plate method for measurement of thermal resistance of polymer sheets and fabrics Ivan Dolezal, Lubos Hes, Kausik Bal International Journal of Occupational Safety and Ergonomics, 2019 Measurement of thermal resistance of polymer sheets and fibrous layers is important in various applications including those within the engineering, ergonomics, clothing design and personal protective equipment fields. Standard methods for measurement of thermal resistance of plain materials are generally time consuming, expensive and often require the sample to be cut. Moreover, the temperature difference between the surfaces of both plates surrounding the sample must be known, as well as the sample thickness. This article describes a new measuring device named the Thermoscope. The Thermoscope is not limited by the aforementioned requirements and is able to evaluate the thermal resistance of polymer sheets and textiles by touching the sample on one surface alone. Simultaneously, the other surface is kept in thermal contact with the supporting base. The accuracy of this device was compared with the Alambeta thermal insulation tester. Effects of various base materials on measurement precision were also studied.
Analytical model to study a new design concept for providing comfort in hot arid climate Indian Journal of Fibre and Textile Research, 2017
Thermal resistance of cut pile hand tufted carpet and its prediction Jaruwan Diswat, Lubos Hes, Kausik Bal Textile Research Journal, 2016 A mathematical model based on the principles of conductive heat transfer is presented to predict the thermal resistance of cut pile carpet. The cut pile carpet assembly is considered as a network of thermal resistances of the tuft yarns, trapped air, and the primary backing fabric. A straightforward calculation of the thermal resistance was not possible as the data for thermal conductivity of the tuft yarns along their axes was not known. Therefore, the calculation of thermal conductivity in the direction of the yarn axis was based on the construction of surface pile and on the measured thermal resistance of carpet for a set of samples. Theoretical thermal resistances of another set of cut pile carpets were calculated by applying the developed thermal model. The results show that the simple network model is robust and gives reasonable values by using the carpet construction parameters. The model can be used for engineering of cut pile carpets to provide a desired level of thermal insulation.
Prediction of needle heating in an industrial sewing machine Adnan Mazari, Kausik Bal, Antonin Havelka Textile Research Journal, 2016 In industrial sewing, needle heating is a key problem that limits the further increase of sewing speed, and hence the productivity. Heat is generated during the sewing process because of friction between the needle and the sewing thread as well as between the needle and the fabric. The high temperature of the needle affects the quality and productivity of the sewing. The problem of needle temperature rise due to friction heat generation is considered in this paper and a simple analytical model is developed to predict needle temperature. The predicted needle temperature is compared with the experimental results by the inserted thermocouple method. Some of the process parameters, used as input variables, were also measured experimentally and experimentally observed values of needle temperature were compared with the theoretical prediction. It was observed that the temperature of the needle increases significantly with the presence of the sewing thread. Both the theory and the experimental results show that the needle temperature increases linearly with the machine speed within the ranges studied.
Temperature distribution on sewing needle at high speed industrial sewing lockstitch machine Vlakna A Textil, 2015
Why black clothes can provide better thermal comfort in hot climate than white clothes Fiber Society Spring 2014 Technical Conference Fibers for Progress, 2014
Modeling and simulation of dielectric permittivity and electromagnetic shielding efficiency of fibrous material Modeling and Simulation in Fibrous Materials Techniques and Applications, 2012
