Abstract
Multilayer needle-punched nonwoven electric heating pads were developed, and their heating behavior was studied by changing the fiber type and needle punch density. Samples were tested by applying the power of 2.9 V over 10 cm2 of area for 10 s. IR thermography was used to investigate the electrical heating behavior. Thermographs revealed that heat spreads more significantly in wool samples as compared to cotton. For optimization, scoring of samples was done. Wool samples score is higher than that of cotton. The score increases by increasing the punch density of nonwoven. Heat retains more significantly in wool as compared to cotton. Heating behavior also changes by changing the punch density as by increasing the fiber entanglement heat holds more ominously within the structure. These attributes proposed that the needle-punched nonwoven heating pads are suitable for better electrical heating.
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