nylon carpet

Due to nylon's excellent wear-resistance, it is widely used in carpeting. However, nylon is stained by certain natural and artificial food colorants; these include coffee, mustard, wine and soft drinks.

While fluorochemical coatings are effective in protecting carpet from substances such as soil, they offer little protection from some types of acid stains. A number of methods were developed to make polyamide fibers more resistant to staining by acid dyes.