The disadvantages of nylon fiber in carpets include its tendency to fade easily and stain and its sensitivity to light and heat. Good quality nylon fiber carpeting is also more expensive than some other types of carpeting material.
The same properties that make nylon fiber easy to dye with bright colors also make it prone to easy staining. Permanent stains can result from certain types of food, especially those that contain oil and grease. Cleaning products containing bleach or acid that are generally used to remove stains from carpets can remove the dye and cause nylon carpets to fade or become bleached out. Prolonged exposure to direct sunlight also causes a nylon carpet to fade and weakens and wears it down more quickly. Nylon fibers melt if exposed to extreme heat. Periodic applications of treatments for stain resistance prolong the longevity and appearance of nylon fiber carpeting.
Cheap nylon carpeting is available, but it tends to lose its bounce, brightness and color quickly. High-end nylon carpeting usually lasts over a decade, but it is more expensive than carpet materials such as olefin, polypropylene or polyester. However, because of its durability, soil resistance, resilience, comfort and bright colors, nylon is by far the most popular carpet fiber in the United States.