Elastic polyurethane (spandex) fiber production process

Spandex fiber in the production of bath concentration control

Spandex is composed of long chain of polymer synthetic fiber.Common commodity name of this kind of fiber include LYCRA (DuPont), DORLOSTAN (Bayer), SPANZELLE (Acordis) and VYRENE (US Rubber).

Usually, spandex fiber structure by double isocyanate with long-chain diol (such as polyester or polyether) reaction.Next, the polymer is dissolved in dimethyl acetamide (10-channel DMAC), ethylene glycol, and then use the diamine extender chain or coupling or water.Can also add dimethyl formamide (DMF), such as nitric acid (HNO3) solvent.The final polymer by spinning technology into fibers.

Visa K - PATENTS^®In situ online refractometer can control spinning bath liquid concentration.When bath concentration to achieve the best quality of the final product will maintain a higher level.

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Polyurethane Elastic Fiber Production Process

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