Process for grafting hydrophilic group on chemical fiber, yarn and fabrics thereof by corona activation

The present invention relates to a kind of technology for branch grafting hydrophilic radical group on chemical fiber, yarn or their fabrics through electric corona activation. The method of the invention is first to place the fibers, yarns or fabrics that are to be treated in the electric field of electric corona discharge electricity with 3,000 to 12,000 voltages and the power of 10 to 500 watts and enable their surface to produce free radical or ionic radical, then to put them into hydrophilic monomer solution to carry out branch grafting poly-reaction and let them be grafted with hydrophilic monomer radical, and finally the modified fibers, yarns or fabrics containing hydrophilic radical will be attained after getting rid of non-reaction monomer and going through washing, oiling and drying processes.