لغت اسپاندکس (spandex) برگرفته شده از لغت expands است. و لفظی است. که در آمریکای شمالی و کانادا بیشترین کاربرد را دارد، در حالیکه در اروپا لغت الاستان (elastane) کاربرد دارد و نزدیکترین لغت برای توصیف ساختار شیمیایی آن است. و در کشورهایی مانند انگلستان، ایرلند، پرتقال، اسپانیا، آمریکای لاتین، است.رالیا و نیوزلند لغت لایکرا (Lycra) است.فاده میشود.

Consistent with SNIA technology, the production process for this product starting with the mixing of monomers as feedback input to the reactors for polymer solution in Dimethylformamide (DMF) in the Chemical Area through to fiber production, drawing, finishing and packaging is continuous and that at each stage samplings and controls are conducted and finally the product is graded and released in accordance with the test results. Bright, dull and semi-dull products are normal. The product is packaged in bales weighing ± kg and then put in covered polypropylene jute and rod guards. The bales measure ** mm. - tons of the product can be transported in a -foot container. 

Like other manmade fibers, polyester fibers are produced using industrial methods and because of their properties are good substitutes for such natural fibers as cotton. This product is made by combining dimethyl terephthalate, monoethylene glycol or terephthalic acid (substitute for the raw material &#;dimethyl terephthalate&#;) in the vicinity of good catalysts. Titanium dioxide is used to make the product look semi-dull. Also, in the production process, the product is submerged in finish (of about .%) prior to packaging. The following are some of the major characteristics of this product.

Our acrylic fibers are produced using monomer acrylonitrile as the major monomer (over %), methylacrylate or vinyl acetate as the second comonomer (less than %) and a third comonomer for dyability, by Solution Polymerization and Wet Spinning using SNIA technology. In both dull and semi-dull product, Titanium Dioxide (max .%) is used. Also, in the process of production, the fibers are submerged in finish (finish of about .%) prior to packing. The following are some of the major characteristics of our products:

Polybest fibers are acrylic fibers replacing asbestos in the preparation of concrete, asphalt, corrugated false ceiling, etc. The cut lengths of this fiber ranges from to mm and their physical and chemical properties differ from those of standard fibers and customized fibers are also produced. The acrylic fibers needed for these products are produced by solution polymerization, wet spinning and SNIA technology using monomer acrylonitrile as the major monomer. Production of this fiber used in industry ranges from . to . dtex and a length of - mm.