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 feedstock input to the reactors for polymer solution in Dimethylformamide (DMF) in the Chemical Area through to fiber production, drawing, finishing and packaging is continuous at that each stage, samplings and controls are conducted and finally the product is graded and released in accordance with the test results.

Licensed by E.I. Du Pont De Nemour based in the US, Acrylic Factory #   has been producing Acrylic Fibers in Iran for three decades. The major monomers used in the production of acrylic fibers are acrylonitrile (AN), methylacrylate (MA) or vinyl acetate (VA). The acrylic fibers from Acrylic Fiber Factory # are produced using Slurry Polymerization and Dry Spinning. The fibers from Acrylic Factory # can be produced with a detex of .- dtex and a cut length of - mm and can also be produced variously on a customized basis. The factory is also capable of producing microdenier fibers. Good tenacity and uniform dyability are among their other outstanding characteristics. The production technology as well as the overall, physical and mechanical characteristics of the fibers is such that they have placed them in the Dralon products by Bayer, Germany. The following are some of the characteristics of our product:

The advantage of Slurry Polymerization is its high flexibility such that the speed of polymerization is about times that of Solution Polymerization and of a good efficiency. The presence of water in the reactive medium minimizes the difficulty of using the solvent. The polymer thus obtained possesses a higher molecular weight and a narrower PDI, improving the physical and mechanical properties of fibers, failure (=break) resistance (good tenacity and elongation) included. Of the unique benefits of the polymerization is the possibility to synthesize polymer without using dyable comonomer while the polymer obtained is capable of being chemically dyed. Of the advantages of Dry Spinning, reference can be made to the presence of microvoids in the fiber structure and its low porosity which improve its luster and make it feel much better. For this reason, too, the fiber longevity improves. Absence of microvoids makes fibers take longer to get dirty and faster to clean when washed. One characteristic of fibers produced by Dry Spinning is the Dog-Bone cross-sectional area. This characteristic adds considerably more to the tenacity and strength of the yarn produced than when other methods are used such that acrylic fibers can be used conveniently in high-speed carpet-weaving machines. Furthermore, owning to this very characteristic, the fiber resilience will increase. This characteristic is particularly important in manufacturing such products as carpets which are constantly subjected to compressive strength which when withdrawn returns to their original standing position. These characteristics have made Dry-Spinning fibers more valuable than fibers produced by other methods.  Produced in the spinning cells, the fibers are washed and then drawn proportionately to improve their mechanical properties. To make manmade fibers look like natural fibers, they are crimped and then cut to customized lengths. Next, they are heat-treated where they are fixed and dried. Finally, the product is packaged in covered polypropylene jutes and rod guards in bales weighing ± kg.

Anti-microbial fibers contain one or several activating agents capable of preventing the growth of or destroying microorganisms. Left in a polluted environment prone to microbial growth for a long time, antimicrobial fibers allow no microorganismic growth. In contrast, &#;Leef = a small rough cloth bag used as a sponge in the bath&#; left under similar conditions for some time would allow many microorganisms to grow on it. At Zayandeh Rood Fiber Company, there is also the customized option available to customer to order antimicrobial fibers with a variety of detexes. The fibers are used in blankets, socks, clothing, household textiles, hats, gloves, filters, sleeping bags, pillow covers, mattresses, etc. 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: