Method for producing yarn from sugarcane

Abstract

A method for producing a yarn from sugarcane is provided, which includes at least 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; 2: extracting natural fibers from the sugarcane to obtain a raw material for preparing long fibers; S3: extracting starch fibers from the sugarcane to obtain a raw material for preparing short fibers; S4: softening the raw material of long fibers and the raw material of short fibers, through matched application of corresponding processing methods, the bagasse left after the processing of sugarcane products can be conveniently reused, and the reused bagasse is treated for yarn preparation, such that the output of waste materials during the production process is reduced.

Claims

1. 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 H.sub.2O.sub.2, 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 H.sub.2O.sub.2. 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 Na.sub.2S.sub.2O.sub.4 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.

2. The method for producing a yam from sugarcane according to claim 1, wherein S2 comprises the following steps: pre acid leaching the separated bagasse with sulfuric acid having a concentration of 0.4-1.4 ml/L, at a temperature of 30-60 C., and a soaking time of 40-75 minutes; adding laccase in a mass ratio of 1:0.2-0.3 to the bagasse after acid leaching, and hydrolyzing for 2-6 hours at a temperature of 60-75 C. to obtain the natural fibers; washing the hydrolyzed natural fibers with water; performing an alkaline reduction treatment on the natural fibers with 5-12 g/L NaOH and 5-10 g/L H.sub.2O.sub.2 to render a pH value of the natural fibers to be 6.5-7.5.

3. The method for producing a yarn from sugarcane according to claim 1, wherein S3 comprises the following steps: soaking the bagasse in a NaOH solution with a pH of 9-11 at 25-60 C. for 1-1.25 h to obtain a solution containing starch; filtering the solution containing starch through a 300 mesh filter and allow a filtrate to settle for 1.2-1.5 hours to obtain a starch emulsion; washing the starch emulsion with distilled water for 6-7 consecutive times, then decolorizing and drying to obtain a sugarcane starch; soaking the sugarcane starch in a NaOH solution with a mass percentage of 0.6%- 1.75% at 24-47 C. for 32-35 minutes, and then filtering an extracted solution through a 300 mesh filter to obtain a filter residue; washing the filter residue twice with anhydrous ethanol and twice with acetone; drying in a constant temperature drying oven to obtain sugarcane starch cellulose.

4. The method for producing a yarn from sugarcane according to claim 1, wherein S8 comprises the following steps: mixing the first fibers and the second fibers to form a roving; feeding the roving into a stretching device for stretching; outputting strands of fiber by a front roller after stretching; twisting by steel rings and steel wire coils, winding onto a tube that rotates with a spindle to form the bobbin yarn.

5. The method for producing a yarn from sugarcane according to claim 1, wherein S4 comprises the following steps: preparing a softener comprising 7-12% alkylphenol ethoxylates, 6-9% sulfonic acid, 4-7.5% fatty alcohol polyoxyethylene ether, 5.6-10.3% sodium fatty alcohol ether sulfate, 7.2-12% coconut diethanolamine, 52-72% subtilase enzyme, 1-2 g/L ethylene diamine tetraacetic acid, and 6-10 g/L NaOH; stacking the raw material of the first fibers and raw material of the second fibers after being sprayed at a temperature of 20 C.-25 C. for 16-25 hours.

Description

DESCRIPTION OF EMBODIMENTS

Example 1

(1) A method for producing a yarn from sugarcane, including at least 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 long fibers; pre acid leaching separated bagasse with sulfuric acid having a concentration of 0.4 ml/L, at a temperature of 30 C., and a soaking time of 40 minutes; adding laccase in a mass ratio of 1:0.2 to bagasse after acid leaching, and hydrolyzing for 2 hours at a temperature of 60 C. to obtain the natural fibers; washing hydrolyzed natural fibers with water; performing an alkaline reduction treatment on the natural fibers with NaOH 5 g/L and H.sub.2O.sub.2 5 g/L to render a pH value of the natural fibers to be 6.5-7.5. S3: extracting starch fibers from the sugarcane to obtain a raw material for preparing short fibers; soaking the bagasse in a NaOH solution with a pH of 9-11 at 25-60 C. for 1 hour to obtain a solution containing starch; filtering the solution containing starch through 300 mesh and allow a filtrate to settle naturally for 1.2 hours to obtain a starch emulsion; washing the starch emulsion with distilled water for 6 consecutive times, then decolorizing and drying to obtain a sugarcane starch; soaking the sugarcane starch in a NaOH solution with a mass percentage of 0.6% at 24 C. for 32 minutes, and then filtering an extracted solution through 300 mesh to obtain a filter residue; washing the filter residue twice with anhydrous ethanol and twice with acetone; drying in a constant temperature drying oven to obtain sugarcane starch cellulose; S4: softening a raw material of long fibers and a raw material of short fibers; preparing a softener according to surfactant TX-10, 7%; sulfonic acid, 6%; surfactant peregal O, 4%; surfactant AES, 5.6%; surfactant 6501, 7.2%; subtilase enzyme, 52%; dispersive chelating agent, 1 g/L; NaOH 6 g/L; spraying the softener on the raw material of long fibers and the raw material of short fibers; stacking the raw material of long fibers and raw material of short fibers after being sprayed at a temperature of 20 C. for 16 hours; S5: performing a decolorize treatment on the raw material of long fibers and the raw material of short fibers that have been softened to render fiber color tend towards white for a subsequent dyeing process; S6: twisting the raw material of long fibers processed in S5 to form the long fibers; S7: twisting the raw material of short fibers processed in S5 to form the short fibers; S8: mixing the long fibers and the short fibers to prepare a bobbin yarn with a ring spinning manner; mixing the long fibers and the short fibers to form a coarse yarn; feeding the coarse yarn into a stretching device for stretching; outputting strands of fiber by a front roller after stretching; twisting by steel rings and steel wire coils, winding onto a tube that rotates with a high-speed spindle to form the bobbin yarn; S9: performing oxidization and desizing of the bobbin yarn, and pre-shrinking of the bobbin yarn at 130 C., adding a refining agent during a pre-shrinking process to remove impurities; S10: performing a causticizing treatment on the bobbin yarn to render the bobbin yarn have strong swelling to improve flexibility and reduce stiffness; S11: performing an enzymatic treatment of the bobbin yarn to improve a finish degree of raw materials, reduce a bending resistance and a stiffness of fibers and further improve a hand feel; S12: reducing and washing the bobbin yarn to control a pH to be 4.5-5.5; S13: drying the bobbin yarn after restoration and washing; S14: stretching and shaping dried bobbin yarn and stacking.

Example 2

(2) A method for producing sugarcane yarn, including at least 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 long fibers; pre acid leaching separated bagasse with sulfuric acid having a concentration of 1.4 ml/L, at a temperature of 60 C., and a soaking time of 75 minutes; adding laccase in a mass ratio of 1:0.3 to bagasse after acid leaching, and hydrolyzing for 6 hours at a temperature of 75 C. to obtain the natural fibers; washing hydrolyzed natural fibers with water; performing an alkaline reduction treatment on the natural fibers with NaOH 12 g/L and H.sub.2O.sub.2 10 g/L to render a pH value of the natural fibers to be 6.5-7.5; S3: extracting starch fibers from the sugarcane to obtain a raw material for preparing short fibers; soaking the bagasse in a NaOH solution with a pH of 11 at 60 C. for 1.25 hours to obtain a solution containing starch; filtering the solution containing starch through 300 mesh and allow a filtrate to settle naturally for 1.5 hours to obtain a starch emulsion; washing the starch emulsion with distilled water for 7 consecutive times, then decolorizing and drying to obtain a sugarcane starch; soaking the sugarcane starch in a NaOH solution with a mass percentage of 1.75% at 47 C. for 32-35 minutes, and then filtering an extracted solution through 300 mesh to obtain a filter residue; washing the filter residue twice with anhydrous ethanol and twice with acetone; drying in a constant temperature drying oven to obtain sugarcane starch cellulose; S4: softening a raw material of long fibers and a raw material of short fibers; preparing a softener according to surfactant TX-10, 12%; sulfonic acid, 9%; surfactant peregal O, 7.5%; surfactant AES, 10.3%; surfactant 6501, 12%; subtilase enzyme, 72%; dispersive chelating agent, 2 g/L; NaOH 10 g/L; spraying the softener on the raw material of long fibers and the raw material of short fibers; stacking the raw material of long fibers and raw material of short fibers after being sprayed at a temperature of 25 C. for 25 hours; S5: performing a decolorize treatment on the raw material of long fibers and the raw material of short fibers that have been softened to render fiber color tend towards white for a subsequent dyeing process; S6: twisting the raw material of long fibers processed in S5 to form the long fibers; S7: twisting the raw material of short fibers processed in S5 to form the short fibers; S8: mixing the long fibers and the short fibers to prepare a bobbin yarn with a ring spinning manner; mixing the long fibers and the short fibers to form a coarse yarn; feeding the coarse yarn into a stretching device for stretching; outputting strands of fiber by a front roller after stretching; twisting by steel rings and steel wire coils, winding onto a tube that rotates with a high-speed spindle to form the bobbin yarn. S9: performing oxidization and desizing of the bobbin yarn, and pre-shrinking of the bobbin yarn at 130 C., adding a refining agent during a pre-shrinking process to remove impurities; S10: performing a causticizing treatment on the bobbin yarn to render the bobbin yarn have strong swelling to improve flexibility and reduce stiffness; S11: performing an enzymatic treatment of the bobbin yarn to improve a finish degree of the raw materials, reduce a bending resistance and a stiffness of the fibers and further improve a hand feel; S12: reducing and washing the bobbin yarn to control a pH to be 4.5-5.5; S13: drying the bobbin yarn after restoration and washing; S14: stretching and shaping dried bobbin yarn and stacking.

(3) For those skilled in the art, it is obvious that the present disclosure is not limited to details of the exemplary embodiments described above and can be implemented in other specific forms without departing from the spirit or essential features of the present disclosure. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present disclosure is limited by the appended claims rather than the above description. Therefore, it is intended to encompass all variations falling within the meaning and scope of equivalent elements of the claims within the scope of the present disclosure.