Polypropylene fiber can not be colored by any of the traditional dyes because of their chemical inertness. The molecules of fiber does not contain reactive groups, and its structure is quite dense, so that the dye molecules can not penetrate into the fiber. Thus, the dyes added to the polypropylene fiber immediately before the extrusion, ie the yarn should be painted to manufacturing carpet. Because of this coating of polypropylene col, they do not fade, though their color Gamma is not a distinctive variety. Polypropylene has good pyatnostoykost. It is hydrophobic, and is not afraid of water-based substances (wine, lemonade), but oily substances (eg, cream pie, or mayonnaise) represent a serious danger for him. Polypropylene is a unique material originally having anti-static, which allows not handle it antistatic (but the extent of pollution fibers lose this property). The advantage of this fiber in its cheapness.
Polypropylene is cheaper than nylon, not to mention the hair. The disadvantages of polypropylene include low durability and poor fire safety. Polypropylene melts at a temperature of 165 C and quickly wear out under heavy use, so the use of carpet out of it is not recommended in public places. Coating of polypropylene can be either single-level and multilevel loop and slotted (about carpet designs, see below), the choice depends on the conditions under which will be operated by the coating. In places with high traffic (Eg, corridors), it is best to use the cover of polypropylene with low single-level loop and a density of not less than 20 ounces (678 grams) per square meter.