CN110359141B - Raw ramie spun yarn and manufacturing method thereof - Google Patents
Raw ramie spun yarn and manufacturing method thereof Download PDFInfo
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- CN110359141B CN110359141B CN201910546635.4A CN201910546635A CN110359141B CN 110359141 B CN110359141 B CN 110359141B CN 201910546635 A CN201910546635 A CN 201910546635A CN 110359141 B CN110359141 B CN 110359141B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/01—Natural vegetable fibres
- D10B2201/08—Ramie
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- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to a ramie raw ramie spun yarn and a manufacturing method thereof, comprising the following steps: mechanically softening and piling raw ramie to obtain softened raw ramie stalks; and (3) tearing the ramie raw ramie stalks, and then sequentially performing the working procedures of opening, needle combination, combing, drawing, roving, spinning and spooling on long ramie spinning equipment to obtain the ramie raw ramie yarns. The method directly uses the raw ramie as a raw material, and the raw ramie is firstly subjected to mechanical softening and stacking treatment to soften the raw ramie so as to be beneficial to subsequent tearing and opening, so that the raw ramie yarn can be obtained on long ramie spinning equipment through opening, needle combination, combing, drawing, roving, spinning and spooling in sequence, the mechanical production of the raw ramie yarn is realized, the obtained raw ramie yarn is uniform in yarn and uniform in yarn strength, and can be used for grass cloth machine weaving, the weaving efficiency is improved, and the labor intensity is reduced; the linen woven by the ramie raw linen yarn can achieve the effect of imitating manual grass cloth.
Description
Technical Field
The invention relates to the technical field of ramie spinning, in particular to a ramie raw ramie spun yarn and a manufacturing method thereof.
Background
The ramie fiber has a ditch-shaped cavity in the middle, the tube wall is porous, and is slender, tough, light in weight, and can absorb moisture and disperse moisture quickly, so that the air permeability is about three times higher than that of cotton fiber, and at the same time, the ramie fiber contains elements such as sting, pyrimidine and purine, so that the ramie fiber has different degrees of inhibition effects on staphylococcus aureus, pseudomonas aeruginosa, escherichia coli and the like, has the functions of corrosion prevention, bacteria prevention, mildew prevention and the like, is internationally known as 'the king of natural fiber', and is also praised as 'Chinese grass and Chinese treasure' by western countries. The ramie fabric is health-care, breathable, rough and elegant, and has unique product style and good wearability. Grass cloth is also called ramie cloth, is a traditional cloth which is formed by manually weaving pure ramie as a raw material, is widely used in various fields of shoes, hats, clothes, furniture decoration, even health care and the like, and has practical and aesthetic values which cannot be replaced by other textiles. The traditional grass cloth is woven by taking manual yarn picking of ramie as a raw material through dozens of manual procedures of reeding, brushing pulp, weaving, and the like, and is time-consuming, labor-consuming and very difficult.
Although, with the continuous development of the textile technology, the mechanized operation can be used for replacing the hand weaving, thereby improving the production efficiency. However, ramie fiber has high lignin content, more pectin wax, high initial modulus and high rigidity, so that the mechanical spinning processability of the ramie fiber is poor. The traditional manual yarn picking is low in yield, uneven in yarn, easy to split and break at joints, and cannot be used for weaving grass cloth by a machine.
At present, the spinning of ramie is carried out by pretreating raw ramie by chemical degumming and softening, etc. to obtain refined dry ramie, and then spinning by using refined dry ramie as raw material. In order to improve the mechanical spinning processability of ramie, domestic and foreign scholars have developed a series of researches on chemical modification of ramie fibers, but the researches have more or less problems of environmental pollution, fiber damage and the like. The length of the ramie fiber is also treated by research, and the combed degummed ramie is subjected to stretch breaking before the drawing process to stretch break the ramie fiber into the length of the cotton fiber, so that the ramie fiber can be processed on cotton spinning equipment, and the spinning efficiency is improved. However, the ramie spun yarn prepared by the method is woven, and the obtained linen cannot achieve the effect of imitating the manual grass cloth.
Disclosure of Invention
Therefore, a manufacturing method of the ramie raw ramie spun yarn is needed, which not only can improve the production efficiency, but also can well retain part of colloid and better maintain the fiber length and color of the ramie raw ramie, so that the woven linen can achieve the effect of imitating the handmade grass linen.
A manufacturing method of a raw ramie spun yarn comprises the following steps:
mechanically softening and piling raw ramie to obtain softened raw ramie stalks;
and (3) tearing the ramie raw ramie stalks, and then sequentially opening, needling, combing, drawing, roving, spinning and spooling on a long ramie spinning device to obtain the ramie raw ramie yarns.
Ramie raw ramie is raw ramie which has not been subjected to degumming treatment, wherein about 70% of the ramie raw ramie is cellulose, 25% of the ramie raw ramie is pectin, and 5% of the ramie raw ramie is other impurities.
The method directly uses raw ramie as a raw material, and the raw ramie is firstly treated by mechanical softening and piling to soften the raw ramie so as to be beneficial to the subsequent garland and opening, so that the raw ramie yarn can be obtained by opening, needling, combing, drawing, roving, spinning and spooling on a long ramie spinning device in sequence. Meanwhile, the chemical degumming treatment is not needed to be carried out on the raw ramie in the whole method process, so that the use of strong acid and strong base in the degumming process can be reduced, the pollution to the environment is reduced, and the cost is saved; and the ramie raw ramie yarn obtained through the spinning process has uniform yarn and uniform yarn strength, can be used for weaving grass cloth by a machine, improves the weaving efficiency and reduces the labor intensity.
In one embodiment, the feeding amount of the mechanical ramie softening is 600-800 g, the ramie softening times are 3-4 times, and the pressurizing of an empty roller is 9-11 kg.
Therefore, by controlling the feeding amount and the roller pressure and increasing the ramie softening times to 3-4 times, the raw ramie can be well softened, the hand feeling is improved, and the subsequent opening is facilitated.
In one embodiment, in the mechanical ramie softening step, the ramie raw ramie is moistened and oiled by using soft sesame oil, and the weight ratio of the soft sesame oil to the ramie raw ramie is (0.1-0.15): 1.
In one embodiment, the time of the stacking treatment is 7-10 days, and the moisture regain of the raw ramie subjected to the stacking treatment is 16% -20%.
Therefore, internal stress generated by mechanical ramie softening can be well reduced through the warehouse piling treatment for 7-10 days.
In one embodiment, the combing is carried out by a combing machine, the pulling gauge of the combing machine is 28-35 mm, the back row circular comb is made of (18-24) needles/cm thin card clothing, and the top comb is made of a single row of needles.
In one embodiment, the twist factor of the spun yarn is 105-195.
Therefore, by controlling the twist coefficient and the sizing treatment of the spun yarn, the obtained ramie raw ramie spun yarn in the subsequent step has less hairiness, and the woven grass cloth is stiff and has less hairiness.
In one embodiment, the winding speed of the winder is 300-400 m/min, and the electrical clearance parameters are as follows: m is 6-8, DS is 2.5-3.5 times, LS is 3.5-4.5 cm.
It is to be noted that M represents a material coefficient, DS represents a stub diameter, and LS represents a stub length. Thus, the winding speed of the winding is set to be 300-400 m/min, and the electrical cleaning parameters are as follows: the M is 6-8, the DS is 2.5-3.5 times, and the LS is 3.5-4.5 cm, so that the uneven style of the yarn can be kept, and the style of the linen woven by the method is closer to that of grass cloth woven by manual yarn twisting.
In one embodiment, the drawing is performed in three drawing passes, and the drawing process parameters are as follows: the number of times of hitting the needle plate is 600-390 times/minute, the specification of the needle plate is 10-18 needles/inch, the drafting gauge is 40-50 mm, the weight of the drawn sliver is (35-75) g/5m, and the drafting multiple is 6-10.
In one embodiment, the step of mechanically softening the ramie further comprises the step of grading the raw ramie before the step of mechanically softening the ramie.
The raw ramie is classified according to the quality of the raw ramie, and the raw ramie with the same grade is spun, so that the spinning effect is improved, and the product quality uniformity is improved.
The invention also aims to provide the ramie raw ramie yarn prepared by the preparation method.
The ramie raw ramie yarn obtained by the manufacturing method has uniform yarn and uniform yarn strength, and can be used for weaving grass cloth by a machine.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
An embodiment of the invention provides a manufacturing method of a ramie raw ramie spun yarn, which comprises the following steps:
mechanically softening and piling raw ramie to obtain softened raw ramie stalks;
tearing the ramie raw ramie stalks, and then sequentially performing opening, needle drawing, combing, drawing, roving, spinning and spooling on long ramie spinning equipment to obtain the ramie raw ramie yarns.
In one embodiment, the feeding amount of the mechanical ramie softening is 600g to 800g, the ramie softening times is 3 to 4 times, and the pressure of an empty roller is 9kg to 11 kg.
Because the raw ramie is raw ramie which is not degummed and contains more colloid and impurities, the raw ramie is softened by adopting less feeding and heavy pressurization during mechanical softening and three to four mechanical softening processes, thereby being beneficial to the subsequent tearing and opening of ramie.
In one embodiment, in the mechanical ramie softening step, the ramie raw ramie is moistened and oiled by using the soft sesame oil, and the weight ratio of the soft sesame oil to the ramie raw ramie is (0.1-0.15): 1.
Furthermore, the used flaxseed oil is FD-ZY03A ramie oil in the chemical industry of Chinese spinning or an emulsion of tea oil and water.
Preferably, the flaxseed oil is FD-ZY03A ramie oil in the middle spinning chemical industry, and the weight ratio of the flaxseed oil to the ramie raw ramie is (0.1-0.15): 1
In one embodiment, the time of the stacking treatment is 7-10 days, and the moisture regain of the raw ramie subjected to the stacking treatment is 16% -20%.
As the raw ramie contains more colloid and impurities and has hard texture, more ramie oiling agent is sprayed during mechanical ramie softening, the moisture regain is easily high, the oil and water are uniform through 7-10 days of warehousing treatment, the moisture regain is controlled to be 16-20%, and the internal stress generated by the ramie softening is reduced.
In one embodiment, combing is carried out by a combing machine, the pulling gauge of the combing machine is 28-35 mm, the back row circular comb is made of thin card clothing of 18-24 needles/cm, and the top comb is made of single row needles.
In order to reduce the production cost, a single combing process is adopted, the drawing gauge is shortened to 28-35 mm, the back row circular comb adopts 18-24 needles/cm of thin card clothing, and the top comb adopts a single row of needles, so that impurities and short and thick fibers in the original hemp are removed, and the spinning quality is improved.
In one embodiment, drawing adopts three drawing passes, and the drawing process parameters are as follows: the number of times of hitting the needle plate is 600-390 times/minute, the specification of the needle plate is 10-18 needles/inch, the drafting gauge is 40-50 mm, the weight of the drawn sliver is (35-75) g/5m, and the drafting multiple is 6-10.
In one embodiment, the roving may be one roving or two rovings.
Wherein, the technological parameters of one roving are as follows: the speed of the front roller is 120-140 r/min, the speed of the spindle is 280-320 r/min, the gauge between the front roller and the middle roller is 25-35 mm, the gauge between the front roller and the back roller is 220-230 mm, the twist coefficient is 20-26, and the drafting multiple is 7-9.
The technological parameters of the second roving are as follows:
the technological parameters of the head roving are as follows: the speed of a front roller is 120-140 r/min, the speed of a spindle is 280-320 r/min, the gauge between the front roller and a middle roller is 25-35 mm, the gauge between the front roller and a rear roller is 220-230 mm, the twist coefficient is 20-26, and the drafting multiple is 7-9;
the technological parameters of the second roving are as follows: the speed of the front roller is 70-90 r/min, the speed of the spindle is 450-550 r/min, the gauge between the front roller and the first roller is 50-60 mm, the gauge between the first roller and the second roller is 50-60 mm, the gauge between the second roller and the third roller is 70-80 mm, the gauge between the third roller and the rear roller is 85-95 mm, the twist coefficient is 18-20, and the drafting multiple is 5-7.
In one embodiment, the spun yarn has the following process parameters: the speed of the front roller is 80-100 rpm, the speed of the spindle is 3000-3500 rpm, the gauge between the front roller and the middle roller is 100-110 mm, the gauge between the front roller and the back roller is 230-260 mm, the twist coefficient is 105-195, and the draft multiple is 10-12.
In one embodiment, the winding speed of the winder is 300-400 m/min, and the electrical clearance parameters are as follows: m is 6-8, DS is 2.5-3.5 times, LS is 3.5-4.5 cm.
In one embodiment, the mechanical ramie softening step further comprises a step of grading the raw ramie before the mechanical ramie softening step.
Specifically, the raw ramie can be classified according to the industry standard, the flawed ramie is removed, the classification is carried out according to the quality of the raw ramie, the length of the raw ramie is more than or equal to 60cm, the impurity content is less than or equal to 1.0%, the raw ramie is more than or equal to 60cm, the impurity content is less than or equal to 1.5%, the raw ramie is more than or equal to 60cm, the impurity content is less than or equal to 2.0%, and the like.
The following are specific examples
The procedures of softening ramie, opening, needling, combing, drawing, roving, spinning and spooling in the specific embodiment of the invention adopt the same mechanical equipment as the existing long ramie spinning process.
Example 1 spinning 11Nm Low count yarn
Raw hemp and the like: the first-class ramie raw ramie is selected as a raw material through the raw ramie classification.
Softening hemp: the process is carried out on a CZ141 ramie softening machine, and the ramie fibers are repeatedly bent and kneaded through a groove roller on the ramie softening machine, so that the softness and the looseness of the ramie fibers are increased, the infiltration of the soft sesame oil is facilitated, and the subsequent opening is also facilitated.
The technological parameters of softening the ramie are as follows: 650 g of feeding amount, 10kg of pressurizing of an empty roller and 3 times of ramie softening; the soft sesame oil adopts FD-ZY03A ramie oil in the middle spinning chemical industry, and the dosage of the soft sesame oil is 15%.
Stacking: dividing the ramie raw ramie after softening into 750g of ramie stalks, stacking for 7 days to ensure that oil and water are uniform, eliminating the internal stress generated during softening the ramie and ensuring that the moisture regain is between 16 and 20 percent.
Tearing the piled ramie stalks, and directly performing the working procedures of opening, needle combination, combing, drawing, roving, spinning and spooling on long ramie spinning equipment.
Opening: loosening the piled ramie stalks and making into ramie rolls.
Opening technological parameters: 65 g/m, a cylinder speed of 126 rpm and a doffer speed of 15 rpm.
Steel wire: the hemp is rolled into raw strips through a steel wire process.
The steel wire process comprises the following steps: the weight of the discharged strip was 6 g/m, the cylinder speed was 178 rpm and the doffer speed was 20 rpm.
And needle combination process parameters: 9 g/m, front roller speed 70.
Combing for one time: most of impurities, short fibers and hemp particles in the hemp strips are combed by a combing machine.
Combing process conditions: the distance between every two adjacent drawing lines is 30mm
Rear row round comb thin card clothing
A top comb with a single row of needles.
Three-step drawing: three passes of drawing were performed using a drawing frame, and the raw slivers were combined into mature slivers.
One roving: and drawing and thinning the drawn sliver into a roving sliver by a roving machine.
Spinning: the roving is drawn down by a spinning frame to a 11Nm yarn.
Spooling: and winding the spun yarn into a cheese through a winder.
Example 2 spinning of 21Nm Medium yarn
Raw hemp and the like: the first-class ramie raw ramie is selected as a raw material through the raw ramie classification.
Softening hemp: the process is carried out on a CZ141 ramie softening machine, and the fibrilia is repeatedly bent and kneaded through a groove roller on the ramie softening machine, so that the softness and the looseness of the fibrilia are increased, the infiltration of the soft sesame oil is facilitated, and the subsequent opening is also facilitated.
The technological parameters of softening the ramie are as follows: the feeding amount is 650 g, the pressure of an empty roller is 10kg, and the ramie softening times are 4 times; the softening oil agent adopts FD-ZY03A ramie oil agent in the middle spinning chemical industry, and the dosage of the softening oil agent is 15%.
Stacking: dividing the ramie raw ramie into 750g of ramie stalks, stacking for 10 days to ensure that oil and water are uniform, eliminating internal stress generated during ramie softening, and ensuring that the moisture regain is between 16 and 20 percent.
Directly opening, needling, combing, drawing, roving, spinning and spooling the piled raw ramie stalks on a long ramie spinning device.
Opening C111B: loosening the piled ramie, and making into ramie rolls.
Opening technological parameters: 65 g/m, a cylinder speed of 126 rpm and a doffer speed of 15.
Steel wire CZ 191: the hemp is rolled into raw strips through a steel wire process.
The steel wire process comprises the following steps: the weight of the discharged strip was 6 g/m, the cylinder speed was 178 rpm and the doffer speed was 20 rpm.
And needle combination process parameters: 9 g/m, front roller speed 70.
One pass combing B311: most of impurities, short fibers and hemp particles in the hemp strips are combed by a combing machine.
Combing process conditions: the distance between every two adjacent drawing lines is 30mm
Rear row round comb thin card clothing
A top comb with a single row of needles.
Three-pass drawing CZ 304A: three passes of drawing were performed using a drawing frame, and the raw slivers were combined into mature slivers.
Two-path roving: and drawing and thinning the drawn sliver into a roving sliver by a roving machine.
Spun yarn FZ 501: the roving is drawn down by a spinning frame to a 21Nm yarn.
And (3) spooling M1332: and winding the spun yarn into a cheese through a winder.
Example 3
Example 3 is substantially the same as example 1 except that the number of times of the mechanical ramie softening process in example 3 is 4.
Example 4
Example 4 is substantially the same as example 2 except that the comb process of example 4 has a draft gauge of 35 mm.
Example 5
Example 5 is basically the same as example 1 except that the spun yarn of example 5 has a twist multiplier of 195.
Comparative example 1
Comparative example 1 is substantially the same as example 1 except that comparative example 1 is not mechanically processed for ramie, stockpiling treatment is directly performed for 10 days, FD-ZY03A ramie oil in the textile industry is sprayed in wine before stockpiling, the weight ratio of the hemp oil to the ramie raw ramie is the same as that of example 1, and the subsequent procedures of tearing, opening, needle drawing, combing, drawing, roving, spinning and spooling are also the same as that of example 1.
Because the raw ramie has high rigidity and hard quality, the raw ramie is not mechanically softened, the softening effect of 10 days of stacking treatment is poor, the softening is not uniform, the ramie stalks cannot be opened in the processes of tearing and opening, the subsequent carding is seriously influenced, and the mechanical spinning cannot be realized.
Comparative example 2
Comparative example 2 is substantially the same as example 1 except that comparative example 2 was carried out without combing and the process flow was: softening ramie, piling, tearing ramie, opening, needling, drawing, roving, spinning and spooling. Because the short fiber content in the ramie stripes is high without combing, the large-belly leather yarns appear in the roving process, and the spinning broken ends are high in the spinning process, so that the mass production cannot be realized.
The properties of the raw ramie spun yarns produced in examples 1 to 5 and comparative example 2 are shown in table 1.
TABLE 1
| Yarn uniformity | Average strength | Strong unevenness | Uneven weight | |
| Example 1 | 26.08 | 1291 | 19.92 | 4.7 |
| Example 2 | 34.76 | 530 | 20.83 | 4.0 |
| Example 3 | 24.79 | 1478 | 22.82 | 4.1 |
| Example 4 | 32.47 | 610 | 13.77 | 4.3 |
| Example 5 | Strong twisted yarn | 675 | 11.18 | 3.5 |
| Comparative example 2 | 39.03 | 952 | 21.66 | 5.1 |
| Traditional manual yarn twisting 11Nm | Uneven thickness | 549 | 30.8 | 8.6 |
Note: weight unevenness refers to the level of weight variation of 50 meters of yarn.
Compared with the traditional manual yarn picking, the yarn spun by the method has the advantages of uniform yarn, uniform yarn strength and higher average strength, and can be used for machine weaving of grass cloth. Moreover, compared to the yarns spun in examples 3 and 4, the yarns spun in examples 1 and 2 had better quality than example 1 in example 3 and better quality than example 2 in example 4. Example 5 a hard twist process was used with less yarn hairiness and a hand feel closer to the hardness of hand yarn.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A manufacturing method of a raw ramie spun yarn is characterized by comprising the following steps:
mechanically softening and piling raw ramie to obtain softened raw ramie stalks; the feeding amount of the mechanical ramie softening is 600-800 g, the ramie softening times are 3-4 times, and the pressure of an empty roller is 9-11 kg;
tearing the ramie raw ramie stalks, and then sequentially performing opening, needle combination, combing, drawing, roving, spinning and spooling on long ramie spinning equipment to obtain ramie raw ramie spun yarns;
in the mechanical ramie softening step, softening and oiling are carried out on the ramie raw ramie by using soft sesame oil, wherein the weight ratio of the soft sesame oil to the ramie raw ramie is (0.1-0.15): 1;
the stacking treatment time is 7-10 days, and the moisture regain of the raw ramie stalks subjected to stacking treatment is 16% -20%;
the combing is carried out for one time by adopting a combing machine, the pulling gauge of the combing machine is 28-35 mm, the back row circular comb adopts (18-24) needles/cm of thin card clothing, and the top comb adopts a single row of needles;
the raw ramie is raw ramie which is not subjected to degumming treatment.
2. The method of claim 1, wherein the flaxseed oil is FD-ZY03A ramie oil or an emulsion of tea oil and water.
3. The method of claim 1, wherein the roving is one roving or two rovings.
4. The method of claim 3, wherein the one roving has process parameters of: the speed of the front roller is 120-140 r/min, the speed of the spindle is 280-320 r/min, the gauge between the front roller and the middle roller is 25-35 mm, the gauge between the front roller and the back roller is 220-230 mm, the twist coefficient is 20-26, and the drafting multiple is 7-9.
5. The method of claim 3, wherein the process parameters for the two rovings are as follows:
the technological parameters of the head roving are as follows: the speed of a front roller is 120-140 r/min, the speed of a spindle is 280-320 r/min, the gauge between the front roller and a middle roller is 25-35 mm, the gauge between the front roller and a rear roller is 220-230 mm, the twist coefficient is 20-26, and the drafting multiple is 7-9;
the technological parameters of the second roving are as follows: the speed of the front roller is 70-90 r/min, the speed of the spindle is 450-550 r/min, the gauge between the front roller and the first roller is 50-60 mm, the gauge between the first roller and the second roller is 50-60 mm, the gauge between the second roller and the third roller is 70-80 mm, the gauge between the third roller and the rear roller is 85-95 mm, the twist coefficient is 18-20, and the drafting multiple is 5-7.
6. The method according to claim 1, wherein the twist multiplier of the spun yarn is 105 to 195.
7. The manufacturing method according to claim 1, wherein the winding speed of the bobbin is 300-400 m/min, and the electrical cleaning parameters are as follows: m is 6-8, DS is 2.5-3.5 times, LS is 3.5-4.5 cm.
8. The manufacturing method according to claim 1, wherein the drawing adopts three-pass drawing, and the drawing process parameters are as follows: the number of times of hitting the needle plate is 600-390 times/minute, the specification of the needle plate is 10-18 needles/inch, the drafting gauge is 40-50 mm, the weight of the drawn sliver is (35-75) g/5m, and the drafting multiple is 6-10.
9. The method according to any one of claims 1 to 8, further comprising a step of grading the raw ramie before the step of mechanically softening the ramie.
10. The ramie raw ramie yarn manufactured by the manufacturing method of any one of claims 1 to 9.
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