Fine processing method of long fibrilia

Abstract

The invention provides a fine processing method of long fibrilia, which comprises the following steps: splitting raw fibrilia by a splitting machine, removing short fibrilia by a hackling machine, and reserving the long fibrilia with the length of more than or equal to 35mm; the combed fibers are straightened into strips, five fiber bundles are combined into one, and the uniformity of the fiber strips is enhanced; spinning the combined fiber strips into rough yarns by adopting a roving frame, and controlling the twist degree to be 20-30 twists per meter; placing the roving in a cooking pot, adding a degumming solution, and cooking for 2 hours; washing with a detergent for 30 minutes, and then washing with hot water until the pH is neutral; a softening agent is used, the bath ratio is 1: 10, and dipping is performed for 30 minutes at the temperature of 50 DEG C; drying the fibers until the moisture regain is 80%, spraying a linen softening agent, standing in a curing room at 40 DEG C for 48 hours, and controlling the final moisture regain to be 30%; and winding into a barrel through a winding machine, and packaging.

Description

Technical Field

[0001] This invention relates to a method for processing long flax fibers, specifically, to a method for refining long flax fibers. Background Technology

[0002] Long flax, such as linseed and hemp, is a high-quality natural cellulose fiber, highly favored for its excellent moisture absorption, breathability, antibacterial properties, and UV resistance. However, long flax fibers must undergo degumming before spinning to remove non-cellulose components such as pectin and lignin from the fiber surface, allowing for fiber separation and achieving good spinnability. Existing degumming methods for long flax mainly include chemical, enzymatic, and physical methods. Furthermore, current long flax processing procedures are mostly linear applications of single technologies, lacking a systematic approach that organically integrates chemical, physical, and biological technologies. This results in long flax fibers often failing to achieve optimal performance in key indicators such as splitting density, softness, and strength, thus failing to meet the spinning requirements of high-end, high-count yarns.

[0003] Therefore, there is an urgent need for a refined processing method for long flax fibers that can efficiently remove gluten while protecting fiber strength and improving product quality. Summary of the Invention

[0004] Design a method for refining long flax fibers that can efficiently remove gluten while protecting fiber strength and improving product quality.

[0005] This invention provides a method for refining long flax fibers, comprising the following steps: Step 1: After the raw hemp is bundled by a bundling machine, short hemp fibers are removed by a combing machine, leaving long hemp fibers with a length of ≥35mm; Step 2: Straighten the combed fibers into strips, and combine 5 fiber bundles into one to enhance the uniformity of the fiber strips; Step 3: Use a roving frame to spin the combined fiber sliver into roving, controlling the twist to be 20-30 twists per meter; Step 4: Place the roving in a cooking tank, add degumming solution, and cook for 2 hours; Step 5: Wash with detergent for 30 minutes, then rinse with hot water until pH neutral; Step 6: Use fabric softener at a liquor ratio of 1:10 and soak at 50°C for 30 minutes; Step 7: Dry the fibers, spray with a softening agent, and let them stand in a 40℃ curing room for 48 hours; Step 8: Wind the rolls into tubes using a winding machine, and then package them.

[0006] Preferably, in the ultrasonic-assisted degumming process described in step four, the ultrasonic generator adopts an intermittent working mode, with a working cycle of 5 minutes of operation and 2 minutes of rest.

[0007] Preferably, after washing with the detergent in step five, an enzyme treatment process is carried out, using a compound enzyme solution of pectinase and ligninase at a dosage of 1.5% of the fiber weight, and treating for 45 minutes at pH=5.5 and temperature of 50°C.

[0008] Preferably, an antibacterial agent accounting for 0.5% of the fiber weight is added to the softening treatment solution in step six.

[0009] Preferably, glycerin, accounting for 2% of the fiber weight, is added as a moisturizer to the conditioning solution in step seven.

[0010] Preferably, the draft ratio of the roving frame in step three is controlled at 1.2 to 1.5.

[0011] Preferably, an environmentally friendly oxygen bleaching stabilizer is used in the degumming solution in step four.

[0012] Preferably, the winding density of the winding machine in step eight is controlled at 0.45~0.50 g / cm³. 3 .

[0013] The beneficial effects of this invention are as follows: A method for refining long flax fibers is invented, employing ultrasonic assistance. Utilizing the cavitation effect and mechanical action of ultrasound, the gum layer on the fiber surface is powerfully broken, increasing the penetration rate and reaction efficiency of the degumming agent into the fiber interior. This allows for deep and uniform degumming with relatively mild chemical concentrations and in a shorter time, while minimizing fiber damage. By introducing an optional composite enzyme treatment process, residual pectin and lignin after chemical degumming can be specifically and gently degraded, further improving the fiber's splitting degree and softness. Mechanical combing, ultrasonic strengthening, bio-enzyme catalysis, and chemical treatment are organically integrated into a coherent process flow, making it widely applicable. Detailed Implementation

[0014] To make the technical solution of the present invention easier to understand, the technical solution of the present invention will be clearly and completely described by describing specific embodiments.

[0015] Example 1: A method for refining long flax fibers includes the following steps: Step 1: After the raw hemp is bundled by a bundling machine, short hemp fibers are removed by a combing machine, leaving long hemp fibers with a length of ≥35mm; Step 2: Straighten the combed fibers into strips, and combine 5 fiber bundles into one to enhance the uniformity of the fiber strips; Step 3: Use a roving frame to spin the combined fiber sliver into roving, controlling the twist to be 20-30 twists per meter; Step 4: Place the roving in a cooking tank, add degumming solution, and cook for 2 hours; Step 5: Wash with detergent for 30 minutes, then rinse with hot water until pH neutral; Step 6: Use fabric softener at a liquor ratio of 1:10 and soak at 50°C for 30 minutes; Step 7: Dry the fibers to 100%, spray with a softening agent, and let stand in a curing room at 40℃ for 48 hours, controlling the final moisture regain to 12%. Step 8: Wind the rolls into tubes using a winding machine, and then package them.

[0016] In step four, during the ultrasonic-assisted degumming process, the ultrasonic generator operates in an intermittent mode, with a working cycle of 5 minutes on and 2 minutes off, in order to enhance the uniformity of degumming and save energy.

[0017] After washing with the detergent described in step five, an enzyme treatment process is carried out, using a compound enzyme solution of pectinase and ligninase at a dosage of 1.5% of the fiber weight, and treating for 45 minutes at pH=5.5 and temperature of 50°C to further remove residual gum.

[0018] In step six, an antibacterial agent of 0.5% of the fiber weight is added to the softening solution.

[0019] In step seven, glycerin, accounting for 2% of the fiber weight, is added to the conditioning treatment solution as a humectant to improve the fiber's flexibility and antistatic properties.

[0020] In step three, the draft ratio of the roving frame is controlled at 1.2 to 1.5 times to maintain the strength and uniformity of the fibers.

[0021] The degumming solution described in step four uses an environmentally friendly oxygen bleaching stabilizer.

[0022] In step eight, the winding density of the winding machine is controlled at 0.45~0.50 g / cm³. 3 This is to ensure the stability of the yarn package structure.

[0023] Example 2: When using this method: Flax is selected for its initial fiber length distribution. The flax is split into suitable bundles on a bundling machine and then fed into an automatic carding machine. The carding machine's needle density and spacing are adjusted to thoroughly comb the fibers, removing most short fibers, flax chips, and impurities, resulting in clean, parallel combed long flax. The combed long flax is then processed into continuous, uniform slivers (green slivers) on a sliver forming machine. To improve evenness, five green slivers are combined and drafted on a drawing frame. This process can be repeated 1-2 times to obtain a finished flax sliver with low weight unevenness. The finished flax sliver is then fed into a roving frame. An appropriate twist is applied to spin a tightly structured, high-strength flax roving, which is then wound onto a roving bobbin. For feeding and processing: the roving is evenly loaded into the cooking tank and immersed in the working solution. The ultrasonic generator system coupled to the cooking tank is activated, using continuous wave mode. The sealed cooking tank was heated to 135°C at a rate of 2°C / min and maintained at this temperature for 120 minutes. During the heat treatment, ultrasonic waves were continuously applied.

[0024] After steaming, the temperature and pressure are reduced, and the waste liquid is discharged into the workshop wastewater collection main. The degummed yarn is rinsed 2-3 times with hot water at 80-85℃ to remove most of the residual alkali and decomposition products. At room temperature, the yarn is treated with dilute sulfuric acid solution for 20 minutes, and the neutralized yarn is placed in a treatment tank. A compound enzyme preparation consisting of pectinase and xylanase (total enzyme activity ≥5000 U / mL) is added at a dosage of 1.0%-1.5% of the dry weight of the fiber, and the treatment is carried out for 50-60 minutes at pH 5.0-5.5 and temperature 50-55℃.

[0025] After enzyme treatment, wash thoroughly with warm water at 60-70℃ to remove all treatment aids and reaction products. Add an amino silicone oil softener and a quaternary ammonium salt antibacterial finishing agent. Immerse the washed fibers in the finishing solution and circulate for 30 minutes. Dehydrate the fibers using a centrifugal dehydrator. Loosely lay the dehydrated fibers and send them into a hot air circulating dryer to dry at 75-80℃ until the moisture regain is 8%-10%. Mix the softening linseed oil with softened water at a ratio of 1:18, and add glycerol (glycerin) at 15% of the weight of the oil as a humectant.

[0026] The curing solution is evenly sprayed onto the dried fibers using a spraying device, with a spray volume of 6%-8% of the fiber's dry weight. The fibers are then placed in a constant temperature and humidity curing chamber and cured for 48 hours at a temperature of 40±2℃ and a relative humidity of 65%±5%. The moisture regain of the fibers after curing is controlled between 12% and 14%. The cured fibers are then wound into standard yarn packages on a winding machine, with a constant winding tension and appropriate winding density. The yarn packages are inspected, weighed, labeled, and finally packaged and stored.

[0027] It should be noted that the embodiments described herein are only some embodiments of this specification, and not all implementations of this specification. These embodiments are merely illustrative and are intended only to provide a more intuitive and clear way to understand the content of this specification, not to limit the technical solutions described herein. All other implementation methods that can be conceived by those skilled in the art without creative effort, as well as other simple substitutions and variations of the technical solutions described herein, without departing from the concept of this specification, are within the protection scope of this specification.

Claims

1. A method for refining long flax fibers, characterized in that, Includes the following steps: Step 1: After the raw hemp is bundled by a bundling machine, short hemp fibers are removed by a combing machine, leaving long hemp fibers with a length of ≥35mm; Step 2: Straighten the combed fibers into strips, and combine 5 fiber bundles into one to enhance the uniformity of the fiber strips; Step 3: Use a roving frame to spin the combined fiber sliver into roving, controlling the twist to be 20-30 twists per meter; Step 4: Place the roving in a cooking tank, add degumming solution, and cook for 2 hours; Step 5: Wash with detergent for 30 minutes, then rinse with hot water until pH neutral; Step 6: Use fabric softener at a liquor ratio of 1:10 and soak at 50°C for 30 minutes; Step 7: Dry the fibers, spray with a softening agent, and let them stand in a 40℃ curing room for 48 hours; Step 8: Wind the rolls into tubes using a winding machine, and then package them.

2. The method for refining long flax fibers as described in claim 1, characterized in that, In step four, during the ultrasonic-assisted degumming process, the ultrasonic generator operates in an intermittent mode, with a working cycle of 5 minutes on and 2 minutes off.

3. The method for refining long flax fibers as described in claim 1, characterized in that, After washing with the detergent described in step five, an enzyme treatment process is carried out, using a compound enzyme solution of pectinase and ligninase at a dosage of 1.5% of the fiber weight, and treating for 45 minutes at pH=5.5 and temperature of 50℃.

4. The method for refining long flax fibers as described in claim 1, characterized in that, In step six, an antibacterial agent of 0.5% of the fiber weight is added to the softening solution.

5. The method for refining long flax fibers as described in claim 1, characterized in that, In step seven, glycerin, accounting for 2% of the fiber weight, is added to the conditioning solution as a moisturizer.

6. The method for refining long flax fibers as described in claim 1, characterized in that, In step three, the draft ratio of the roving frame is controlled at 1.2 to 1.

5.

7. The method for refining long flax fibers as described in claim 1, characterized in that, The degumming solution described in step four uses an environmentally friendly oxygen bleaching stabilizer.

8. The method for refining long flax fibers as described in claim 1, characterized in that, In step eight, the winding density of the winding machine is controlled at 0.45~0.50 g / cm³. 3 .