Corn fiber vortex spun yarn and method of making same

Abstract

The application discloses corn fiber vortex spinning yarn and a preparation method thereof, and belongs to the field of cotton textile technology, and can solve the problems of poor spinnability of the existing corn fiber raw material, poor yarn evenness, high vortex spinning shearing and low efficiency. The preparation method comprises the following steps: step 1, corn fiber and oil are mixed to obtain treated fiber; wherein the weight percentage of the corn fiber and the oil is (100-99):(0-1); step 2, the treated fiber is subjected to a scutching process to obtain a fiber carded sliver; step 3, the fiber carded sliver is subjected to a drawing process to obtain a fiber drawn sliver; and step 4, the fiber drawn sliver is spun by using a vortex spinning process to obtain the corn fiber vortex spinning yarn. The application is used for yarn spinning.

Description

Technical Field

[0001] This invention relates to a corn fiber vortex-spun yarn and its preparation method, belonging to the field of cotton textile technology. Background Technology

[0002] Corn fiber, also known as polylactic acid (PLA) fiber, boasts advantages such as high strength, high elongation, and good resilience. Fabrics made from it are soft to the touch, have good drape, and are UV resistant. Furthermore, its natural acidity provides stable antibacterial and anti-mite effects, particularly against Staphylococcus aureus, making it a promising candidate for applications in T-shirts, lightweight sports underwear, and infant underwear. In addition, PLA corn fiber fabrics can be completely biodegraded in 3-6 months under composting conditions, aligning with national "dual-carbon" development goals.

[0003] However, corn fiber has low moisture regain and poor hygroscopicity, making it prone to static electricity and resulting in poor spinnability. Vortex spinning, with its advantages of short process flow, high efficiency, and strong spinnability, has become a widely adopted new and distinctive spinning method in recent years. In existing vortex spinning technologies, when preparing corn fiber vortex-spun yarn, the high spinning speed and large total draft ratio of the vortex spinning process lead to problems such as poor yarn uniformity and high shear rate, resulting in frequent yarn breakage, poor production conditions, and low production efficiency. Summary of the Invention

[0004] This invention provides a corn fiber vortex-spun yarn and its preparation method, which can solve the problems of poor spinnability of existing corn fiber raw materials, poor yarn evenness, high shearing and low efficiency of vortex spinning.

[0005] On one hand, the present invention provides a method for preparing corn fiber eddy spinning yarn, the method comprising:

[0006] Step 1: Mix corn fiber and oil to obtain treated fiber; wherein the weight percentage of corn fiber and oil is (100-99):(0-1);

[0007] Step 2: Perform a combing and cleaning process on the treated fibers to obtain combed fiber slivers;

[0008] Step 3: Perform a drawing process on the combed fiber sliver to obtain a fiber sliver;

[0009] Step 4: Use vortex spinning process to spin the drawn fibers to obtain corn fiber vortex spun yarn.

[0010] Optionally, the weight percentage of the corn fiber and the oil is 99:1.

[0011] Optionally, the corn fiber has a specification of 1.56 dtex * 38 mm; the corn fiber vortex-spun yarn has a specification of Ne32 count.

[0012] Optionally, in the vortex spinning process, the sliver weight is 20-21 g / 5m; the spinning speed is 430-460 m / min; the TDR draft ratio is 220-230; the MDR draft ratio is 22-26; the BDR draft ratio is 2-4; the feed ratio is 0.5-1; the take-up ratio is 0.8-1.0; the BR starting rate is 120-130%; and the take-up angle is 13°-15°.

[0013] Optionally, after step 4, the preparation method further includes:

[0014] Step 5: Perform a yarn cleaning process on the corn fiber vortex-spun yarn.

[0015] Optionally, in the yarn clearing process, the neps are 220-230%; short thick spots are 80-100% * 3.0 cm; long thick spots are 30-35% * 25 cm; and thin spots are 25-30% * 25 cm.

[0016] Optionally, after step 5, the preparation method further includes:

[0017] Step 6: Apply wax to the yarn that has undergone the yarn cleaning process.

[0018] Optionally, in the carding process, the speed of the cotton grabber is 700-800 r / min; the speed of the cotton blending beater is 200-300 r / min; the speed of the cotton opening beater is 300-400 r / min; the cylinder speed during the carding process is 300-350 r / min, the licker-in speed is 650-750 r / min, and the doffer speed is 30-35 r / min.

[0019] Optionally, in the drawing process, the first drawing interval is 11*9*21, the total draft ratio is 6 to 8, and the back zone draft ratio is 1.86; the second drawing interval is 11*9*21, the total draft ratio is 6 to 8; and the third drawing interval is 8*18, the back zone draft ratio is 1 to 2.

[0020] On the other hand, the present invention provides a corn fiber vortex-spun yarn, which is prepared by any of the preparation methods described above.

[0021] The beneficial effects that this invention can produce include:

[0022] The method for preparing corn fiber vortex-spun yarn provided by this invention is simple, convenient, quick, and highly operable. The prepared corn fiber vortex-spun yarn exhibits high uniformity and low vortex shear. Furthermore, the fabric made from the corn fiber vortex-spun yarn shows no shedding and possesses advantages such as soft hand feel, good drape, UV resistance, low flammability, and complete biodegradability. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the embodiments, but the present invention is not limited to these embodiments.

[0024] This invention provides a method for preparing corn fiber eddy-spun yarn, the method comprising:

[0025] Step 1: Mix corn fiber and oil to obtain treated fiber; wherein the weight percentage of corn fiber and oil is (100-99):(0-1); preferably, the weight percentage of corn fiber and oil is 99:1.

[0026] In this embodiment of the invention, the specifications of the corn fiber can be selected as 1.56 dtex * 38 mm; the specifications of the corn fiber vortex-spun yarn can be selected as Ne32 count. The composition of the oiling agent is: 10-20 parts of polyoxyethylene sorbitan monostearate; 40-45 parts of fatty acid polyoxyethylene ether; and 40-45 parts of amphoteric phosphate amine salt.

[0027] Specifically, in actual production, corn fiber and oil can be mixed and placed in a suitable environment for 36 hours to release the stress and static electricity inside the corn fiber raw material.

[0028] Step 2: Perform a combing process on the treated fibers to obtain combed fiber slivers.

[0029] Specifically: First, the treated fibers (i.e., corn fibers mixed with oil) are manually laid in layers at intervals within the bottom frame of the disc cotton grabber, and then fed into the cotton bin using a direct feeding method. The corn fibers grabbed by the grabber are then fed sequentially into the cotton bins of the multi-bin cotton blender and the cotton opener through the suction pipe for thorough mixing and opening.

[0030] The opened corn fibers are then fed into the vibrating cotton box of the carding and opening machine through the suction pipe. After being mixed in the vibrating cotton box, they are then sent to the carding machine to complete the opening and cleaning process.

[0031] Finally, the corn fibers, after being mixed and opened by the opening machine, are combed into strips by the carding machine to obtain combed corn fiber strips that meet the requirements of process and quality.

[0032] In the actual preparation process, the cotton grabber used can be the FA022A disc cotton grabber, with the following parameters: cotton grabbing speed 700-800 r / min, intermittent drop distance of the grabber 2-3 mm, and blade extension rib spacing 4-6 mm.

[0033] The multi-compartment cotton blending machine that can be used is the FA022-6 model, with a beater speed of 200-300 r / min.

[0034] The cotton opener used can be the ZF1102A comb-type cotton opener, with a beater speed of 300-400 r / min, a distance of 4-6 mm between the cotton feed roller and the beater, and a distance of 1-2 mm between the cotton stripping knife and the beater.

[0035] The carding machine used can be the TC-5 type carding machine, with a cylinder speed of 300-350 r / min, a licker-in speed of 650-750 r / min, a doffer speed of 30-35 r / min, and a five-point spacing between the flat and the cylinder from the inlet to the outlet of 7″, 6″, 6″, 6″, and 7″ respectively. The sliver weight is 25-28 g / 5m.

[0036] By limiting the speed as described above and controlling it appropriately, damage to corn fibers can be reduced.

[0037] Step 3: Perform a drawing process on the combed fiber sliver to obtain a fiber sliver.

[0038] According to the process parameters, the corn fiber combed sliver is drawn on a drawing machine. After one, two and three drawing processes, the corn fiber sliver is obtained.

[0039] Specifically, the drawing frame used in step 3 can be an FA320 model. During the drawing process, corn fibers are prone to issues such as wrapping around the rollers and tangling with the leather rollers. To ensure thorough mixing between fibers, improve the fiber structure in the sliver, and reduce yarn weight unevenness, the drawing process adopts the principle of "large spacing, small tension drafting, heavy pressure, and strong control," employing a three-stage drawing process. The first stage concentrates the back zone drafting to eliminate front hooks; the second stage concentrates the front zone drafting to eliminate back hooks; and the third stage uses a smaller back drafting to reduce yarn unevenness.

[0040] The main process parameters for sliver drawing are as follows: first sliver drawing spacing 11*9*21, total draft ratio 6-8, back zone draft ratio 1.86; second sliver drawing spacing 11*9*21, total draft ratio 6-8; third sliver drawing spacing 8*18, back zone draft ratio 1-2, and sliver weight 20-21 g / m.

[0041] By setting reasonable parameters, weight unevenness and weight deviation can be reduced, and fiber parallel straightness and evenness can be improved.

[0042] Step 4: Use vortex spinning technology to spin the drawn fibers to obtain corn fiber vortex spun yarn.

[0043] According to the process parameters, corn fiber is drawn into slivers and spun out by a vortex spinning machine to obtain corn fiber vortex spun yarn.

[0044] In step S4, the vortex spinning machine used can be an MVS870 air-jet vortex spinning machine. The vortex spinning process employs a larger back zone draft ratio, a smaller spacing, and a larger front roller gripping force to improve yarn evenness. By using a process configuration and adjustments of "light weight, larger back zone draft, low speed, and strong control," the evenness of the corn fiber yarn is improved, shearing and red-light breakage are reduced, production conditions are improved, and production efficiency is increased.

[0045] Main spinning process parameters: sliver weight 20-21g / 5m, spinning speed 430-460m / min, TDR draft ratio 220-230 times, MDR draft ratio 22-26 times, BDR draft ratio 2-4, feed ratio 0.5-1, take-up ratio 0.8-1.0, BR starting rate 120-130%, take-up angle 13°-15°, roller spacing 41mm*43mm, spindle size 1.1mm, cotton collector size 4mm, nozzle and nozzle seat model STAR.

[0046] Furthermore, after step 4, the preparation method further includes:

[0047] Step 5: Perform a yarn cleaning process on the corn fiber vortex-spun yarn.

[0048] Specifically, an MSC-type photoelectric yarn clearer can be used, with clearing parameters appropriately relaxed compared to conventional products: neps 220-230%, short thick places 80-100% * 3.0cm, long thick places 30-35% * 25cm, and thin places 25-30% * 25cm. The splicer should be set to LN2 for twisting degree, using a G2 type nozzle. The splicer opener should open in 0.65s and close in 0.85s; the twister open in 1.5s and close in 1.65s, ensuring strength at the spliced ​​joint while maintaining acceptable appearance.

[0049] After step 5, the preparation method further includes:

[0050] Step 6: Apply wax to the yarn that has undergone the yarn cleaning process.

[0051] To increase the weavability of the yarn, the yarn can be waxed. In this embodiment of the invention, the waxing amount can be set to 0.3%.

[0052] This invention reduces the elongation and thinning of corn fiber slivers and improves the evenness of corn fiber yarn by adjusting spinning parameters such as carding, drawing weight, and drawing ratio.

[0053] Meanwhile, this invention solves the problems of poor spinnability of corn fiber raw materials, poor yarn evenness, high shearing and low efficiency of vortex spinning in the prior art. Moreover, corn fiber vortex-spun yarn fabrics do not have the phenomenon of shedding and have the advantages of soft hand feel, good drape, UV resistance, low flammability and complete biodegradability.

[0054] The present invention will now be described in detail with more specific embodiments.

[0055] Example 1:

[0056] I. Raw Material Selection

[0057] The corn fiber specifications are: 1.56 dtex * 38 mm, with a weight percentage of 100%.

[0058] The oil is manufactured by Takemoto Corporation and accounts for 0% by weight.

[0059] II. Preparation of combed fiber slivers

[0060] The corn fiber mixed with oil was manually layered at intervals inside the bottom frame of a disc cotton picker. An FA022A disc cotton picker was used, with a picker speed of 700 rpm, a 2mm intermittent drop distance between the picker and the ribs, and a 4mm blade extension distance. An FA022-6 multi-bin cotton blender had a picker speed of 200 rpm. A ZF1102A carding opener had a picker speed of 300 rpm, a 4mm gap between the feed roller and the picker, and a 1mm gap between the stripping knife and the picker. The mixed and opened corn fiber was then fed into a TC-5 carding machine with a cylinder speed of 300 rpm, a licker-in speed of 650 rpm, a doffer speed of 30 rpm, and five-point gaps between the flats and the cylinder from inlet to outlet of 7″, 6″, 6″, and 6″ respectively. The sliver weight was 25g / 5m.

[0061] III. Preparation of Fiber Spinning

[0062] The obtained combed corn fiber sliver is processed on an FA320 drawing frame according to certain process parameters, and the corn fiber sliver is obtained through three drawing processes (first, second, and third). Among them, the first drawing spacing is 11*9*21, and the total draft ratio is 6; the second drawing spacing is 11*9*21, and the total draft ratio is 6; the third drawing spacing is 8*18, the back zone draft is 1.25, and the sliver weight is 20g / m.

[0063] IV. Preparation of Corn Fiber Vortex Spinned Yarn

[0064] Corn fiber is drawn into sliver and spun out using an MVS870 air-jet vortex spinning machine to obtain corn fiber vortex-spun yarn. The main spinning process parameters are: sliver weight 20g / 5m, spinning speed 430m / min, TDR draft ratio 220, MDR draft ratio 22, BDR draft ratio 2, feed ratio 0.5, take-up ratio 0.8, BR starting rate 120%, take-up angle 13°, roller spacing 41mm*43mm, spindle size 1.1mm, cotton collector size 4mm, and nozzle and nozzle seat model STAR.

[0065] The prepared corn fiber eddy spinning yarn has a count of Ne32 and a single yarn breaking strength of 210CN.

[0066] Example 2:

[0067] I. Raw Material Selection

[0068] The corn fiber is produced by Guanghua Weiye, with specifications of 1.56 dtex * 38 mm and a weight percentage of 99.5%.

[0069] The oil is manufactured by Takemoto Corporation and accounts for 0.5% by weight.

[0070] II. Preparation of combed fiber slivers

[0071] The corn fiber mixed with oil was manually layered at intervals inside the bottom frame of a disc cotton picker. The FA022A disc cotton picker was used, with a picker speed of 750 rpm, a 2.5 mm intermittent drop distance between the picker and the ribs, and a 5 mm blade extension distance. The FA022-6 multi-bin cotton blender had a picker speed of 250 rpm. The ZF1102A carding opener had a picker speed of 350 rpm, a 5 mm distance between the feed roller and the picker, and a 1.5 mm distance between the stripping knife and the picker. The mixed and opened corn fiber was then fed into an FA203A carding machine with a cylinder speed of 320 rpm, a licker-in speed of 700 rpm, a doffer speed of 32 rpm, and five-point spacings between the flats and the cylinder from inlet to outlet of 7″, 6″, 6″, and 6″ respectively. The sliver weight was 27 g / 5m.

[0072] III. Preparation of Fiber Spinning

[0073] The obtained combed corn fiber sliver is processed on an FA320 drawing frame according to certain process parameters, and the corn fiber sliver is obtained through three drawing processes (first, second, and third). Among them, the first drawing spacing is 11*9*21, and the total draft ratio is 7; the second drawing spacing is 11*9*21, and the total draft ratio is 7; the third drawing spacing is 8*18, the back zone draft is 1.25, and the sliver weight is 20.5g / m.

[0074] IV. Preparation of Corn Fiber Vortex Spinned Yarn

[0075] Corn fiber is drawn into sliver and spun out using an MVS870 air-jet vortex spinning machine to obtain corn fiber vortex-spun yarn. The main spinning process parameters are: sliver weight 20.5g / 5m, spinning speed 450m / min, TDR draft ratio 227 times, MDR draft ratio 25 times, BDR draft ratio 3, feed ratio 0.8, take-up ratio 0.9, BR starting rate 125%, take-up angle 14°, roller spacing 41mm*43mm, spindle size 1.1mm, cotton collector size 4mm, and nozzle and nozzle seat model STAR.

[0076] The prepared corn fiber eddy spinning yarn has a count of Ne32 and a single yarn breaking strength of 213CN.

[0077] Example 3:

[0078] I. Raw Material Selection

[0079] The corn fiber is produced by Guanghua Weiye, with specifications of 1.56 dtex*38 mm and a weight percentage of 99%.

[0080] The oil is manufactured by Takemoto Corporation and accounts for 1% by weight.

[0081] II. Preparation of combed fiber slivers

[0082] The corn fiber mixed with oil was manually layered at intervals inside the bottom frame of a disc cotton picker. An FA022A disc cotton picker was used, with a picker speed of 800 rpm, a 3mm intermittent drop distance between the picker and the ribs, and a 6mm blade extension distance. An FA022-6 multi-bin cotton blender had a picker speed of 300 rpm. A ZF1102A carding opener had a picker speed of 400 rpm, a 6mm distance between the feed roller and the picker, and a 2mm distance between the stripping knife and the picker. The mixed and opened corn fiber was then fed into a TC-5 carding machine with a cylinder speed of 350 rpm, a licker-in speed of 750 rpm, and a doffer speed of 35 rpm. The five-point spacing between the flats and the cylinder from inlet to outlet was 7″, 6″, 6″, and 6″ respectively, and the sliver weight was 28g / 5m.

[0083] III. Preparation of Fiber Spinning

[0084] The obtained combed corn fiber sliver is processed on an FA320 drawing frame according to certain process parameters, and the corn fiber sliver is obtained through three drawing processes (first, second, and third). Among them, the first drawing spacing is 11*9*21, and the total draft ratio is 8; the second drawing spacing is 11*9*21, and the total draft ratio is 8; the third drawing spacing is 8*18, the back zone draft is 2, and the sliver weight is 21g / m.

[0085] IV. Preparation of Corn Fiber Vortex Spinned Yarn

[0086] Corn fiber is drawn into sliver and spun out using an MVS870 air-jet vortex spinning machine to obtain corn fiber vortex-spun yarn. The main spinning process parameters are: sliver weight 21g / 5m, spinning speed 460m / min, TDR draft ratio 230, MDR draft ratio 26, BDR draft ratio 4, feed ratio 1.0, take-up ratio 1.0, BR starting rate 130%, take-up angle 15°, roller spacing 41mm*43mm, spindle size 1.1mm, cotton collector size 4mm, and nozzle and nozzle seat model STAR.

[0087] The prepared corn fiber eddy spinning yarn has a count of Ne32 and a single yarn breaking strength of 215CN.

[0088] The technical performance indicators of the spun corn fiber vortex yarn are shown in Table 1.

[0089] Table 1 Quality parameters of corn fiber vortex-spun yarn in Examples 1-3

[0090]

[0091]

[0092] A comparison of Examples 1, 2, and 3 shows that changing the composition ratio of corn fiber vortex-spun yarn and adjusting the process parameters can increase yarn quality.

[0093] Another embodiment of the present invention provides a corn fiber vortex-spun yarn, which is prepared by any of the preparation methods described above.

[0094] This invention solves the problems of poor spinnability of corn fiber raw materials, poor yarn evenness, high shearing and low efficiency of vortex spinning in the prior art. Moreover, corn fiber vortex-spun yarn fabrics do not have the phenomenon of shedding and have the advantages of soft hand feel, good drape, UV resistance, low flammability and complete biodegradability.

[0095] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A method for preparing corn fiber eddy-spun yarn, characterized in that, The preparation method includes: Step 1: Mix corn fiber and oil agent to obtain treated fiber; wherein, the weight percentage of corn fiber and oil agent is (100~99):(0~1); the composition of oil agent is: 10~20 parts of polyoxyethylene sorbitan monostearate; 40~45 parts of fatty acid polyoxyethylene ether; 40~45 parts of amphoteric phosphate amine salt; Step 2: Perform a cleaning and combing process on the treated fibers to obtain combed fiber slivers; in the cleaning and combing process, the speed of the cotton grabber is 700~800 r / min; the speed of the cotton blending beater is 200~300 r / min; the speed of the cotton opening beater is 300~400 r / min; the cylinder speed during the carding process is 300~350 r / min, the licker-in speed is 650~750 r / min, and the doffer speed is 30~35 r / min; Step 3: Perform a drawing process on the combed fiber sliver to obtain a fiber sliver; in the drawing process, the total draft ratio of the first drawing is 6~8; the total draft ratio of the second drawing is 6~8; and the draft ratio of the back zone of the third drawing is 1~2. Step 4: The fibers are spun using an eddy spinning process to obtain corn fiber eddy spun yarn. In the eddy spinning process, the sliver weight is 20-21 g / 5m; the spinning speed is 430-460 m / min; the TDR draft ratio is 220-230; the MDR draft ratio is 22-26; the BDR draft ratio is 2-4; the feed ratio is 0.5-1; the take-up ratio is 0.8-1.0; the BR starting rate is 120-130%; and the take-up angle is... .

2. The preparation method according to claim 1, characterized in that, The weight percentage of the corn fiber and the oil is 99:

1.

3. The preparation method according to claim 1, characterized in that, After step 4, the preparation method further includes: Step 5: Perform a yarn cleaning process on the corn fiber vortex-spun yarn.

4. The preparation method according to claim 3, characterized in that, In the yarn clearing process, the neps content is 220-230%; the short, thick nodes content is 80-100%. 3.0cm; the thickest part is 30-35% 25cm; details are 25-30% 25cm.

5. The preparation method according to claim 3, characterized in that, After step 5, the preparation method further includes: Step 6: Apply wax to the yarn that has undergone the yarn cleaning process.

6. A corn fiber vortex-spun yarn, characterized in that, The corn fiber vortex-spun yarn is prepared using the preparation method described in any one of claims 1 to 5.

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