With respect to unique feathers of Solid fibers, this kind of fibers can substitute the verity of other kinds of artificial and natural fibers. in spite the fact that, natural fibers have been adapted with human being in textile, but artificial fibers have found appropriate position in textile industry by lifting deficiencies, improving specifications and decreasing production costs. Polyester Staple Fibers have found better position Among this kind of artificial fibers due to physical, mechanical and chemical characteristics which currently in some industries, Polyester fibers have substituted for Acrylic and Polypropylene fibers.