Method for producing yarn from sugarcane

A method for producing a yarn from sugarcane, comprising the following steps:

• S1:
• separating bagasse and a sugarcane juice produced by pressing sugarcane, and dividing the bagasse into two parts, one part being used for extracting natural fibers from the sugarcane and the other part being used for extracting starch fibers from the sugarcane;
• S2:
• extracting natural fibers from the sugarcane to obtain a raw material for preparing first fibers;
• S3:
• extracting starch fibers from the sugarcane to obtain a raw material for preparing second fibers;
• S4:
• softening a raw material of first fibers and a raw material of second fibers;
• S5:
• performing a decolorizing treatment on the raw material of first fibers and the raw material of second fibers that have been softened to render fiber color to be white for a subsequent dyeing process, wherein the decolorizing treatment comprises rinsing softened first and second fibers with warm water of 40-50° C., immersing the first and second fibers in a solution containing 5 g/L of H2O2, adjusting a pH of the solution with NaOH to be 10.5, adding 3g/L sodium silicate, with a bath ratio of 1:15, raising a temperature to 90° C., keeping the temperature for 75 minutes and stirring to uniform decolorization;
• S6:
• twisting the raw material of first fibers processed in S5 to form the first fibers;
• S7:
• twisting the raw material of second fibers processed in S5 to form the second fibers;
• S8:
• mixing the first fibers and the second fibers to prepare a bobbin yarn;
• S9:
• performing oxidization and desizing of the bobbin yarn, and pre-shrinking of the bobbin yarn at 130° C., wherein a refining agent is added during a pre-shrinking process to remove impurities, wherein the refining agent is 10 g/L H2O2. S10:
• performing a causticizing treatment on the bobbin yarn to swell the bobbin yarn to improve flexibility and reduce stiffness;
• S11:
• performing an enzymatic treatment of the bobbin yarn to reduce a bending resistance and a stiffness of the fibers;
• S12:
• washing the bobbin yarn to control a pH to be 4.5-5.5, wherein the washing comprises dissolving a reducing agent Na2S2O4 having a concentration of 0.5-3 g/L into water to form a solution, adding acetic acid to adjust a pH of the solution to 4.5-5.5, immersing the bobbin yarn in the solution with a bath ratio, defined as a material to solution ratio of 1:10-1:15, maintaining a temperature of the solution at 50-60° C. for 20-30 minutes, rinsing the bobbin yarn with 40-50° C. warm water until the pH of the solution is 7, and removing moisture from the bobbin yarn with a centrifuge;
• S13:
• drying the bobbin yarn after washing;
• S14:
• stretching and shaping the dried bobbin yarn and stacking.