najmulkabir.blogspot.com
Build a carrier: November 2007
http://najmulkabir.blogspot.com/2007_11_01_archive.html
Friday, November 30, 2007. Updated: April, 2004 - M. G. Kamath, Atul Dahiya, Raghavendra R. Hegde. Monika Kannadaguli and Ramaiah Kotra). For more than four decades, almost all nonwovens required a chemical binder in order to provide any measure of structural integrity. In addition, the binder was called upon to contribute and convey numerous properties that were necessary for the effective performance of the fabric. The fabric doesn't have enough strength. The fabric is too stiff. In the very early stag...
najmulkabir.blogspot.com
Build a carrier: Diffusion
http://najmulkabir.blogspot.com/2007/11/diffusion.html
Friday, November 23, 2007. Diffusion means penetration/movement of substance owing the existence of conc. gradient i.e. movement of particles between the two surfaces having different density from higher to lower one. This is very important because it affects the fastness properties and the color yield. Dye size and nature of fibers and dyes. Structure of fibers (crystallinity and orientation). Environment pH, solvent, temperature etc. Ds/dt = F = -DA. dc/dx. Where ds/dt = rate of diffusion. Secondly, to...