Processed synthetic polymers used in medical textile are used directly or functionalized by immobilization of bioactive molecules. Textile products made by synthetic polymers are durable, resistant to chemical reactions and have inert structures. Textile products made by synthetic polymers usually have not functional groups for immobilization. So modification could be done for formation of functional groups. Immobilization of bioactive molecules could be done by functional groups. In this study, thrombin was immobilized to textile products made by synthetic polymers. So Textile products made by synthetic polymers was added a now character which was blood stopper. The product was reliable because of source.