Polipropilen is very light material when compared with other fibers ( specific gravity of polypropylene is 0.90 gr/cc this value is 1.38 for polyester , 1.52 for viscose (rayon) , 1.54 for cotton , 1.57 for flax (linen) 1.31 for wool , 1.13 for nylon , 1.17 for acrylic and 1.33 for silk )
This means that covereing power of pp is highest amoung all fibers that enables manifacturers to get much more bulky effect when using pp .
Polypropylene is very resistant to acids , alkalines .
Mildews , fungus and bacteries can not penetrate or live in polypropylene that makes it very suitable yarn for carpet application.
Due to its very low moisture and water absorbancy ( %0,05) Polypropylene is hygienic fiber and prevents the material from generation of bacteries and microorganisms