The Effect of Relaxation Heat-Setting on the Crystal Structure and Dye Uptake of Dyeable PP Fibers
Fu Zhongyu; Tian Muchuan; Sun Rong(Department of Fiber Material Engineering,Beijing institute of Clothing Technology,Beijing 100029)
he dyeable PP Fibers were treated for 20 min at 105,110,120,130,140℃ respectively. The crystallinity and crystal size along the normal line direction of the (110)crystal surface were measured by X-ray diffractometers. Both set and un-set samples were boiling dyed at normal pressure and their dye uptakes were measured.The relations between crystal structure and fiber forming conditions before setting and the effect of the changes in crystal structures upon dye uptake after the process were studied.