Study of Heat Conduction inside Rolling Calender Nip for Different Roll Temperatures

Abstract

Calendering is a smoothening process at the final stage in textile industry, where fabric passes through the nips formed by two or more rolls in contact. The material used for making of rolls varies for different types of calenders. Depending on the quality of fabric required these rolls are hard or soft and can be heated to certain temperature, using induction process, hot water passage or heated oil passage inside the rolls. In rolling calendering process, fabric is pressed between two or more rolls, where nip is formed by the combination of alternate hard and soft rolls. In this paper effect of roll temperature and bonding time on fabric temperature has been discussed using single nip rolling calender, when fabric is inside the calender nip formed by hard and soft rolls having different temperatures using one dimensional unsteady state heat conduction equation.

Wood fiber-reinforced polylactic acid sheets enabled by papermaking

“…Figures 6i and 6j are the SEM images of the calendered composite paper surface morphology under different magnification, respectively. Calendering is a finishing operation in the papermaking industry to enhance the smoothness and gloss of the final paper, which produces a permanent deformation on the fiber and paper (Rättö 2002;Gupta and Kanth 2019). These effects can be clearly observed in Fig.…”

Application of Perturbation Theory in Heat Flow Analysis

“…Recently, Biazar and Eslami proposed the new homotopy perturbation method (NHPM). Construction of an appropriate homotopy equation and selection of appropriate initial approximation guess are two important steps of NHPM [19,20]. The study reveals that with less computational work, we can construct proper homotopy by decomposition of source function in a correct way.…”

“…New homotopy perturbation method is the most powerful tool which can be used to obtain analytical solution of various kinds of linear and nonlinear PDE's. This method is widely used by researchers to obtain solution of various functional Equations [20][21][22].…”