The friction fastness of flame retardant fabrics is divided into two kinds: dry rubbing fastness and wet rubbing fastness. The former is friction flame retardant fabric with dry white cloth; The latter is used to rub flame retardant fabrics with 100% white cloth. Flame retardant fabrics wet rubbing fade is under the action of friction, make water-soluble dye floating color transfer and colored fiber particles caused by mechanical friction transfer, wet friction has the external force function and the water medium role, so wet rubbing generally lower than the dry rubbing fastness about 1 magnitude.
Flame retardant fabrics rubbing fastness depends on what color and the size of the dye molecular weight, the combination of dyes and fibers, the homogeneous degree of the dye penetrant, dye in particle on the surface of the fabric, etc. If reactive dyes, dyes and fibers are combined with covalent bonds, their rubbing fastness is high; And insoluble azo dyes, and dyeing processing, part of the dye is insoluble, they mechanically adhere to the surface of fiber, its low friction fastness, such as floating color removal of impurities, and dye concentration generally slants big, reduce friction fastness. In particular, most dye and fiber binding forces are more vulnerable to damage in water, so the fastness of wet rubbing is lower than that of dry friction.
There are many factors influencing the fastness to rubbing fastness of flame retardant fabrics. The measures must be taken from the selection of dyes, dyeing and finishing process, and the reasonable use of special fixing agent. In conclusion, the most important countermeasures are to control the float color residue of colored textiles, reduce the friction coefficient of the surface and improve the fastness of the combination of dyes and fibers.