Sodium alga acid flame retardant fibers loaded with metal ions and manufacture method thereof

The invention provides sodium alga acid flame retardant fibers loaded with metal ions and a preparation method thereof. The sodium alga acid flame retardant fibers are prepared by the following steps: dissolving a water soluble sodium alga acid hybrid material loaded with metal ions in water to prepare a spinning solution, and performing a wet spinning process, wherein the water soluble sodium alga acid hybrid material loaded with metal ions is composed of sodium alga acid, stabilizer molecules and the metal ions with flame retardant effect. The fibers produced by the method disclosed by the invention have the characteristics of high flame retardant property and high breaking strength. The limit oxygen index of the fibers can be 34% and above, the tensile strength of the fibers is higher than 3.5cN/tex, and the linear density is 2.2-3.5dtex. 本发明提供种负载金属离子的海藻酸钠阻燃纤维及其制备方法。该海藻酸钠阻燃纤维通过水溶性负载金属离子的海藻酸钠杂化材料溶于水制备纺丝原液经湿法纺丝工艺制得；所述水溶性负载金属离子的海藻酸钠杂化材料由海藻酸钠、稳定剂分子和具有阻燃效果的金属离子组成。采用本发明方法生产出的纤维具有阻燃和断裂强度高的特点。该纤维极限氧指数可以达到34％以上，纤维的