Fully recycled sheath-core low-melting point polyester staple fiber

The utility model relates to a polyester fiber material, and particularly relates to a fully recycled sheath-core low-melting point polyester staple fiber. The degree of fineness of the polyester staple fiber is 1.5-5.0dtex, the length is 10-80mm, the polyester staple fiber comprises a sheath layer and a core layer in the diameter direction, the core layer is fully wrapped in the sheath layer, the diameter of the core layer is 0.5-0.9 time of that of the staple fiber, the sheath layer adopts a recycled polyester material with the melting point at 70-160 DEG C, and the core layer adopts the recycled polyester material with the melting point at 250-270 DEG C. Due to the adoption of the technical scheme, the added value of the recycled polyester staple fiber prepared from the polyester waste material is improved, and the sheath-core low-melting point recycled polyester staple fiber has the characteristics of stable quality and excellent quality.