CN101054747A - Corn fiber and regenerative hemp fiber blended antibacterial composite yarn and producing method thereof - Google Patents

Abstract

An antibacterial composite yarn blended with corn fiber and regenerated hemp fiber and a production method thereof relate to spinning technology. According to the technical solution provided by the invention, the antibacterial composite yarn includes 30-60 parts of corn fiber and 40-70 parts of regenerated hemp fiber. During manufacturing: a. Go through the corn fiber in sequence: opening and cleaning, carding, and pre-merging processes for later use; b. Sequentially pass the regenerated hemp fiber through: opening and cleaning, carding, and pre-merging processes for later use; c. The pre-combined corn fiber and regenerated hemp fiber are sequentially subjected to drawing, roving, spun yarn and winding processes to obtain corn fiber and regenerated hemp fiber blended antibacterial composite yarn. The invention combines the excellent characteristics of high strength and good shape retention of corn fiber fabrics, makes up for the shortcomings of poor drape and shape retention of hemp fiber and regenerated hemp fiber fabrics, and can spin fine yarns, which overcomes the difficulty of spinning hemp fibers No. yarn problem.

Description

Corn fiber and regenerated hemp fiber blended antibacterial composite yarn and production method thereof

technical field

The invention relates to an antibacterial composite yarn made by blending corn fiber and regenerated hemp fiber and discloses a production method of the composite yarn.

Background technique

The development of new biodegradable fibers for clothing fabrics or industrial textiles is one of the important topics in the development and research of textiles today. Corn fiber is a new type of environmentally friendly fiber developed by Cargill-Dow (CARGILL～DOW) Polymer Company and Japan Bell Spinning and other companies. The fiber is made of polylactic acid fiber extracted from corn starch, that is, PLA fiber, which is called corn fiber in our country.

Corn fiber combines the advantages of natural fiber and chemical fiber. Its mechanical properties are between polyester and nylon, and its strength and modulus are lower than polyester fibers and higher than nylon. Therefore, corn fiber fabrics are soft to the touch, have silky luster and brightness, and have good strength, drape, dimensional stability, elasticity and wrinkle resistance. Corn fiber has good biodegradability. After being buried in the soil for 2 to 3 years, its strength will disappear and it will be completely decomposed into CO ₂ and H ₂ O. Its combustion smoke is low, and no toxic and harmful substances will be produced. The dyeing performance of corn fiber is basically the same as that of polyester, but its hygroscopicity and high temperature resistance are poor, and its moisture regain is 0.5%. Pure corn fiber fabrics have poor moisture absorption and breathability, and are more difficult to dye and finish. Corn fiber has poor spinnability, similar to polyester, and can be spun purely or blended with cotton, wool or other natural fibers. Corn fiber fabrics can be used in clothing and cushion fillings, medical and sanitary products, baby products and other fields.

Corn fiber fabrics have good appearance retention and good biodegradability. However, corn fiber has poor spinnability, moisture absorption and high temperature resistance, which limits the popularization and application of this new type of green fiber. Moreover, in today's pursuit of clothing fashion and health care, corn fiber has no antibacterial and health care functions, which is also a major disadvantage. Although corn fiber can be blended or interwoven with antibacterial polyester, its moisture absorption and breathability cannot be improved, and polyester is difficult to biodegrade, which impairs the environmental protection characteristics of corn fiber fabric.

Therefore, improving the machinability of corn fiber and its fabric's wearability and antibacterial health care performance, thereby improving the comprehensive performance and added value of corn fiber has become an important topic at present.

Hemp fiber is also a new type of fiber that has been developed in recent years. The density is: 1.458g/cm ³ ; the strength is: 5.8-6.8g/dtex; the moisture regain is 12%; the saturated moisture regain is 50%. Hemp textiles have many excellent properties. Hemp textiles have natural antibacterial properties. Hemp fiber contains tetrahydrocannabinol (THC) and cannabinolic acid, etc., which will produce cannabinol after light and air oxidation. , Candida albicans, etc. have obvious killing and inhibiting effects. Because the hemp fiber cell has a larger cavity and more oxygen, the anaerobic bacteria cannot survive, so its anti-mold and antibacterial effect is more prominent. Hemp textiles have good moisture absorption and air permeability, with a moisture regain of 12% and a saturated moisture regain of 50%. There is a slender cavity in the center of the hemp fiber that connects with many cracks and small holes distributed on the surface of the fiber. The excellent capillary effect makes the hemp fiber fabric particularly good in moisture absorption and perspiration. Hemp textiles have high porosity, good sound absorption and air permeability, and good heat resistance, which can withstand the test of high temperature of 370 °C. Therefore, in addition to being used for clothing, hemp textiles can also be used for interior decoration. The room decorated with hemp textiles can not only reduce noise, but also provide a quiet space for people to work and live. Also because of its good moisture absorption and dehumidification, it can adjust the indoor temperature and humidity, and is a natural green air conditioner. Hemp fiber is resistant to sunlight and corrosion. Therefore, hemp textiles are especially suitable for sun protection clothing and various special work clothes, as well as sun umbrellas, camping tents, fishing nets, ropes, car seat cushions, lining materials, etc. In addition, the hemp fabric has the function of protecting against ultraviolet radiation. According to the test by the Institute of Physics, Chinese Academy of Sciences: Ordinary clothing can only block 30% to 90% of ultraviolet rays, while ordinary hemp fabrics can block more than 95% of ultraviolet rays without special finishing.

Therefore, in theory, hemp fiber is the most ideal raw material for underwear, summer clothes, bedding, etc. However, hemp fiber has the common disadvantages of hemp fiber, such as thicker yarn count, thick fabric, poor wear resistance, wrinkle resistance and shape retention, rough hand feeling, and itchy feeling when touching the skin. Above-mentioned shortcoming greatly limits the application of hemp fiber on underwear, summer clothes. Especially hemp short hemp is more serious, the single fiber length is short, generally 20-50mm, and the fiber length uniformity is not high. This is very unfavorable for spinning, and it is difficult to spin medium and fine yarns (below 30tex). Although it can be blended or interwoven with other fibers, it can only improve its textile processing and wearing properties to a certain extent, and damage the style and antibacterial health care properties of hemp fabrics.

If the corn fiber yarn is interwoven with hemp long hemp yarn, the antibacterial and moisture absorption and breathability properties of the corn fiber fabric can be improved, and at the same time, the soft comfort, dimensional stability and wrinkle resistance of the hemp fabric can also be improved, but the final fabric loses The corn fiber fabric has excellent appearance properties such as lightness, soft touch, drape, wrinkle resistance and silky luster. If corn fiber is blended with hemp staple fiber, fine yarn (below 20tex) cannot be spun. Moreover, the higher the hemp fiber blending ratio, the thicker the spun yarn, making it difficult to weave light and thin fabrics. If the hemp fiber blending ratio is too low (less than 20%), the final fabric will be difficult to achieve the expected antibacterial health care performance. Therefore, the above is not an ideal method.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, provide a corn fiber that can take advantage of the advantages of good luster, high strength, good elasticity, high modulus, and biodegradability, and make up for its low moisture absorption and poor spinnability. , no natural antibacterial properties, poor taking performance and other shortcomings, but also under the premise of maintaining the antibacterial, moisture absorption, breathable and cool advantages of hemp fiber, the high strength and good shape retention of corn fiber make up for the hemp fiber. The fiber has the disadvantages of poor drapability and poor shape retention, and can spin fine-gauge yarns, even extra-fine-gauge yarns below 10tex, which overcomes the problem that hemp fibers are difficult to spin fine-gauge yarns.

Another object of the present invention is to disclose a production method of the above-mentioned corn fiber and regenerated hemp fiber blended antibacterial composite yarn.

According to the technical solution provided by the invention, the antibacterial composite yarn includes 30-60 parts of corn fiber and 40-70 parts of regenerated hemp fiber, the unit is parts by mass.

The regenerated hemp fiber is a fiber regenerated from one or more of hemp short hemp, hemp hemp, hemp stalk and stalk core.

The production method of the above-mentioned corn fiber and regenerated hemp fiber blended antibacterial composite yarn includes:

a. Raw material preparation: 30-60 parts of corn fiber and 40-70 parts of regenerated hemp fiber respectively go through the processes of opening and cleaning, carding, and pre-merging for subsequent use; the unit is parts by mass;

When opening and cleaning corn fiber, the speed of the carding cylinder is controlled at 600-700r/min, and the speed of the beater is controlled at 800-900r/min;

When opening and cleaning the regenerated hemp fiber, the speed of the carding cylinder is controlled at 500-600r/min, and the speed of the beater is controlled at 700-800r/min;

When carding corn fiber or regenerated hemp fiber, the speed of the cylinder is controlled at 280-330r/min, the speed of the licker-in roller is controlled at 600-850r/min, and the surface speed ratio of the cylinder and the licker-in roller is controlled at 2-2.5. At the same time, raise the feeding board by 1-2 mm, increase the distance between the feeding board and the licker-in roller, increase the line speed ratio between the licker-in roller and the cylinder, and reduce the distance between the doffer and the cylinder;

b. After the pre-combined corn fiber and regenerated hemp fiber are sequentially drawn, roving, spun and winding processes are obtained to obtain a blended antibacterial composite yarn of corn fiber and regenerated hemp fiber.

In the cotton opening and cleaning process, the beater adopts a comb needle beater or a comprehensive beater; the drawing process should be "heavy pressure, medium weight, low speed", the draft in the rear area is larger than that of pure cotton spinning, the front tension draft and the back tension draft The average elongation is smaller than that of pure cotton spinning, approximately equal to 1, and the tension after the machine is increased; the roving process is "large gauge, heavy pressure", and the twist coefficient of the roving is appropriately increased at the same time. In the spinning process, pay attention to the selection of the traveler and the selection of the twist of the yarn. The twist coefficient is 330-380. The speed of the traveler should not be too high, and the appropriate weight of the traveler should be selected. Compared with the original hemp fiber, the regenerated fiber not only maintains the excellent properties of the original hemp fiber, but also has the properties of viscose fiber, such as the fineness and length can be controlled according to needs, and the spinnability, hygroscopicity and dyeability are good. , biodegradable and cheap. The fabric is soft, non-itchy, and comfortable to wear, but its stiffness and wrinkle resistance are slightly poor.

The above-mentioned processes such as opening and cleaning, carding, pre-drawing, drawing, roving, spun yarn, and winding are described in detail in "Cotton Spinning Technology" and "Cotton Spinning Handbook".

The invention adopts corn fiber and regenerated hemp fiber to make antibacterial composite yarn by blending.

Blending corn fiber and regenerated hemp fiber is used to weave a new type of fabric with excellent properties such as antibacterial, health care, biodegradable, light, soft, drape, shape retention, wrinkle resistance and bright color. These products are suitable for fashion, casual wear, suits, shirts and home textiles. The unique properties of this fabric are not a simple superposition of the advantages of the two fibers. He must, according to the needs of the final product, rationally mix and optimize the structure and processing parameters of the yarn and fabric. The combined effect of the physical and chemical properties of the two fibers produces the desired style characteristics and performance of the product.

This diversified fiber raw material structure, on the one hand, utilizes the complementary properties of regenerated hemp fiber and corn fiber to improve and optimize the performance of corn fiber products, enrich and expand the colors and styles of products. On the other hand, it makes up for the current high price of corn fiber. More importantly, by blending corn fiber and regenerated hemp fiber, fine-gauge yarn, even extra-fine-gauge yarn below 10tex can be spun, which overcomes the problem that hemp fiber is difficult to spin fine-gauge yarn. The yarn can be used to produce light, soft and non-itchy fabrics.

The principles of each spinning process are as follows

(1) Blend ratio

The performance of corn fiber is close to that of polyester. Regenerated hemp fiber is similar to viscose fiber. Therefore, the blending of high proportion corn fiber and regenerated hemp fiber improves the spinnability of corn fiber, improves the moisture absorption, breathability and antibacterial performance of corn fiber fabric, and reduces the production cost. Blended with high proportion of regenerated hemp fiber and corn fiber, it overcomes the disadvantages of poor dimensional stability and wrinkle resistance of hemp fiber and regenerated hemp fiber fabrics, and improves the high-end wearing style of the fabric. In view of the above principles, the blending ratio of corn fiber is not less than 30 parts, and the blending ratio of regenerated hemp fiber is not less than 40 parts, which not only ensures the appearance of the fabric, such as wrinkle resistance, dimensional stability, and scratch resistance, but also improves the hygiene and comfort of the fabric Properties, such as moisture absorption, breathability, antibacterial health care. At the same time, it embodies the concept of green environmental protection.

(2) Opening and cleaning process

I Corn fiber opening and cleaning process

Corn fiber has good length uniformity, good elasticity and less impurity. But the moisture regain is low, the hygroscopicity is poor, there is slight static electricity, the melting point is low, the fiber is very fluffy after opening, and it is easy to cause sticking. Due to the greater elasticity of the fiber, the elongation of the cotton lap is relatively large under the action of pressure, and its retraction is also large under the relaxed state, which is easy to produce negative elongation, and the elongation of the cotton lap can reach -1.56%. In order to ensure the internal quality and appearance quality of the cotton lap, the speed of each part is appropriately reduced, and the technological principle of "grasping frequently and less grasping, more loosening and less beating, light combing and less shedding" is adopted. The three-wing beater removes the blade, and the distance between each part should be appropriately enlarged. Anti-sticking measures must be taken to reduce sticking. The main beaters are comb needle beaters or integrated ones, and the beater speed is lower than that of polyester spinning.

Preferably, the cotton opening and cleaning process in the spinning process is as follows: the dry weight of the cotton lap is not less than 400g/m, the weight of the lap is about 13kg, the speed of the card drum is 600-700r/min, and the three-wing comb or comprehensive Beater 800～900r/min. The distance between the beater of the cotton opener and the cotton feeding roller is 10~12mm, the distance between the beater and the dust removal rod is 16×18×20×22.5mm, and the distance between the beater of the cotton cleaner and the cotton feeding roller is 8～ 10mm, the beater-dust rod spacing is (11~15)mm×(20~22)mm.

II. Regenerated hemp fiber opening and cleaning process

Like viscose fiber, regenerated hemp fiber has low strength, poor fiber resilience, high moisture regain, and has the characteristics of good fiber uniformity and no impurities. The blow to avoid the generation of linters. Therefore, the process principle of "combing instead of beating, more combing and less falling, and full mixing" is adopted. The beater is changed to comb type or integrated type. The three-wing beater removes the blade, the distance between the cotton roller and the beater is wider than that of cotton, and the speed of the beater is lower. Generally, it is 15~ slower than that of pure cotton spinning. 30%. The angle of the dust rod should be adjusted to a smaller angle with the rotation direction of the thug or the dust rod should be reversed. At the same time, it is also necessary to prevent the sticking of the cotton lap, and the pressure at both ends of the pressing roller should be 20% to 40% heavier than that of spinning pure cotton. In order to prevent the generation of static electricity, it is required to maintain a relatively high relative humidity, which is generally controlled at 65-70%.

(3) Carding process

I corn fiber carding process

Because corn fiber has good elasticity and elastic recovery, and the fiber is fluffy, the carding process should adopt the technological principle of "more combing and less shedding", the gauge of each part should be relatively large, and the production process should be similar to polyester. Considering that the cotton-type cotton-feeding board will cause greater damage to the fibers, the cotton-feeding board should be raised by 1 to 2 mm. Increase the gauge between the cotton feeding board and the licker-in roller, and reduce the speed of the licker-in roller appropriately to reduce fiber damage. The setting of bottom leakage and dust removal knife is aimed at reducing the drop rate. Appropriately control the gap between the inlet and outlet of the small drain to reduce waste. Increase the line speed ratio of licker-in roller and cylinder, and reduce the distance between doffer and cylinder, which is beneficial to fiber transfer. Appropriately increase the distance between the cylinder and the cover plate to control the carding of fibers and reduce neps. It mainly solves the problem of difficulty in carding into sliver and blocked inclined pipe, and improves the transfer ability of fibers.

Preferably, the cotton opening and cleaning process in the spinning process is as follows: the weight of raw sliver is lighter than that of spinning cotton; The surface speed ratio of the rollers is 2 to 2.5, and the flat speed is the lowest gear speed of the machine used, for example, the lowest flat speed of the FA201B carding machine is 90mm/min. The speed of doffer is 6~36r/min. The distance between feeding board-licker-in roller and cylinder-cover board is larger than that of spinning cotton. Ensure that the spun sliver has less neps, smooth and delicate appearance, and good cotton net clarity.

II Regenerated hemp fiber carding process

Regenerated hemp fiber has low strength and is easy to break. In order to reduce fiber damage, the speed configuration of cylinder, licker-in roller and cover plate should be low, and the distance between cylinder and cover plate should be larger than that of spinning cotton. Increase the distance or remove the dust knife. The tension of the cotton web is randomly controlled during production, which is not much different from that of ordinary chemical fibers, and there will not be too many phenomena of the cotton web falling or the edges of the cotton web falling. The tension of the cotton web should be slightly larger to improve the fiber transfer rate and the clarity of the cotton web. The relative humidity is generally controlled in the range of 60-65%.

Preferably, the cotton opening and cleaning process in the spinning process is similar to that of corn fiber, and only needs to be properly adjusted.

(4) Drawing process

In order to ensure the straightness and separation of the fibers in the cooked sliver, improve the evenness of the cooked sliver, correctly control the quantitative, and make the blending ratio comply with the regulations, the corn fiber and the regenerated hemp fiber are used to pre-merge separately and then go through three blending processes. craft.

In view of the characteristics of poor electrical conductivity and fluffy fibers of corn fiber, the drawing process adopts the process principle of "heavy pressure, medium weight, low speed" to reduce the phenomenon of "three winding" and clogging in production. The drawing speed should not be too high. Due to the difference in elastic elongation of the two blended fibers, the fiber elongates under the action of the draft force when the first parallel is drawn, and in the relaxed state after the two parallel machines, the corn fiber shrinks due to its elasticity. In this way, the regenerated hemp fiber and corn fiber in the sliver after the machine are different in length, and the sliver is split, resulting in double feeding and self-stopping after the machine. By increasing the tension at the back of the machine, adjusting the angle between the sliver guide and the sliver at the back of the machine, the friction force is increased and the driving is normal.

Preferably, the parameters of the drawing frame in the spinning process are configured as follows: the weight of the cooked sliver is lighter; the draft in the rear area is larger than that of pure cotton spinning, and the front tension draft and post tension draft are both smaller than those of pure cotton spinning, approximately equal to 1.

(4) Roving process

In order to prevent the deterioration of evenness caused by accidental drafting, the process principle of "large gauge and heavy pressure" is adopted in the roving process, and the twist coefficient of the roving is appropriately increased, so as to ensure that the roving is formed and the spun yarn is unwound. , so as not to cause accidental drafting, and it is also beneficial to the control of fibers in the drafting area of the spun yarn. However, attention should be paid to avoid the phenomenon of "hard ends" in the spun yarn.

Preferably, the main process parameters of the roving process in the spinning process are configured: the twist coefficient (56-86) is smaller than that of cotton spinning, the jaw of the apron is larger than that of cotton spinning, and the pressure of rollers is larger than that of cotton spinning.

(5) Spinning process

In the spinning process, pay attention to the selection of the traveler and the selection of the yarn twist. The yarn twist coefficient of the knitting yarn is 350, and the weaving yarn is about 370-380. Since the corn fiber has a low melting point, the speed of the traveler should not be too high. And select the appropriate traveler weight to prevent hairiness and ensure the quality of the yarn.

Preferably, the configuration of the main process parameters of the spun yarn process in the spinning process: the twist coefficient is 330-380; Large; the gap between the jaws is about 2.5mm, which is relatively small; the rear draft ratio is (1.14-1.50), which is larger than that of cotton spinning; the total draft ratio can be relatively large.

The invention provides a composite yarn blended with corn fiber and regenerated hemp fiber. The yarn can be woven with excellent properties such as antibacterial health care, biodegradability, moisture absorption, breathability, lightness and softness, drape, shape retention, wrinkle resistance and bright color. In one new fabric. The invention takes full advantage of the advantages of corn fiber such as good luster, high strength, good elasticity, high modulus and biodegradability, and makes up for its shortcomings such as low moisture absorption, poor spinnability, no natural antibacterial properties, and poor wearing performance. It can also make up for the poor drape and shape retention of hemp fiber and regenerated hemp fiber fabrics under the premise of maintaining the advantages of hemp fiber such as antibacterial, moisture absorption, breathability and coolness. Shortcomings, and can spin fine yarn, even extra-fine yarn below 10tex, overcome the problem that hemp fiber is difficult to spin fine yarn. The yarn can be used to weave light, soft and non-itchy fabrics.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

Example 1

A production method for blending antibacterial composite yarn of 14.5tex corn fiber and regenerated hemp fiber. The blending ratio is: 60 parts of corn fiber and 40 parts of regenerated hemp fiber. The detailed steps of the process are as follows. The regenerated hemp fiber can be made from one or more of hemp short hemp, hemp drop, hemp stalk and rod core.

1. Process flow:

Corn fiber: A002D bale opener→A035D mixed opener (with condenser)→A035D mixed opener (with condenser)→A036B porcupine opener (with condenser)→A092A cotton feeder (with condenser) Condenser)→A076F lapping machine→FA201B carding machine

Regenerated hemp fiber: A002D bale opener → A035D mixed opener (with condenser) → A035D mixed opener (with condenser) → A036B porcupine opener (with condenser) → A092A cotton feeder ( Condenser attached)→A076F lapping machine→FA201B carding machine

Corn fiber raw sliver and regenerated hemp fiber raw sliver→FA311 (FA303) draw frame (three lanes)→A454G roving frame→FA 1508 spinning frame→ORION～M automatic winder

2. Spinning process parameters

(1) Corn fiber opening and cleaning, carding, pre-merging process

Cotton opening and cleaning process: lap weight 410g/m, fixed length 32.9m, lap weight 13kg; carding roller speed controlled at 600-700r/min, A035D porcupine beater speed 800r/min, A036B porcupine beater speed 800r/min, A076F comprehensive beater speed 900r/min, lap roller speed 11r/min; cotton opener beater and cotton feeding roller distance is 11mm, beater-dust rod distance 16×18×20×22.5mm; cotton cleaning The distance between the machine beater and the cotton feeding roller is 9mm, and the distance between the beater and the dust removal rod is 13×21mm.

Carding process: raw sliver basis weight is 19.97g/5m; cylinder speed is 330r/min, licker-in speed is 810r/min, doffer speed is 22r/min, flat speed is 78mm/min; cylinder flat gauge 0.35mm, 0.35mm, 0.30mm, 0.30mm, 0.35mm, cylinder-doffer gauge: 0.13mm, doffer-stripping roller gauge: 0.35mm, licker-in cylinder gauge: 5(10/1000 ″), the distance between feeding plate and licker-in roller is 0.25mm.

(2) Regenerated hemp fiber opening and cleaning, carding, pre-merging process

Cotton opening and cleaning process: lap weight is 420g/m, fixed length is 31.2m, lap weight is 13.5kg; the speed of carding roller is controlled at 500-600r/min, the speed of A035D porcupine beater is 800r/min, and the speed of A036B porcupine beater is 700r/min , A076F comprehensive beater speed is 800r/min, lap roller speed is 11r/min; the distance between the opener beater and the cotton feeding roller is 11mm, the distance between the beater and the dust removal rod is 16×18×20×22.5mm; The distance between the cotton machine beater and the cotton feeding roller is 9mm, and the distance between the beater and the dust removal rod is 13×21mm.

Carding process: raw sliver weight is 19.97g/5m; cylinder speed is 330r/min, licker-in speed is 600r/min, doffer speed is 22r/min, flat speed is 78mm/min; cylinder flat gauge 0.35mm, 0.35mm, 0.30mm, 0.30mm, 0.35mm, cylinder-doffer gauge: 0.13mm, doffer-stripping roller gauge: 0.35mm, licker-in cylinder gauge: 5(10/1000 ″), the distance between feeding plate and licker-in roller is 0.25mm.

(3) Drawing process Quantitative cooked bar (g/5m) combined root number Total draft multiple Roller center distance(mm) Roller pressurization (N) corn fiber pre-consolidation 18.52 6 6.47 45×48 196×294×392×392 regenerated hemp fiber 18.52 6 6.47 45×48 mix one 18.05 3PLA/2H 5.18 47×51 mix two 17.88 8 8.08 47×51 mixed three 15.10 8 9.47 45×48

Note: polylactic acid fiber code -PLA, regenerated hemp fiber code -H

(4) Roving process: the weight of roving is 4.799g/10m, the twist coefficient of roving is 74, the draft in the rear area is 1.242 times, the total draft is 6.29 times, the center distance of rollers is 52×54mm, and the roller pressure is 26×15× 22N.

(5) Spinning process: the front roller speed is 210r/min; the twist coefficient is 347; the nip gap is 2.5mm; the rear draft ratio is 1.37 times; the total draft ratio is 35.45 times; the roller pressure is 16×12 ×16daN.

Example 2

A production method of 14.5tex corn fiber and regenerated hemp fiber blended antibacterial composite yarn, the blending ratio is: corn fiber accounts for 50 parts, regenerated hemp fiber accounts for 50 parts, and the detailed steps of the process are as follows. The regenerated hemp fiber can be made from one or more of hemp short hemp, hemp drop, hemp stalk and rod core.

1. Process flow:

Same as Example 1

2. Spinning process parameters

(1) Corn fiber opening and cleaning, carding, pre-merging process

Same as Example 1

(2) Regenerated hemp fiber opening and cleaning, carding, pre-merging process

Same as Example 1

(3) Drawing process Quantitative cooked bar (g/5m) combined root number Total draft multiple Roller center distance(mm) Roller pressurization (N) corn fiber pre-consolidation 18.52 6 6.03 45×48 196×294×392×392 regenerated hemp fiber 18.52 6 6.03 45×48 mix one 18.44 6 6.47 47×51 mix two 17.10 6 6.4 47×51 mixed three 15.10 6 6.8 45×48

(4) Roving process: roving basis weight is 3.13g/10m, roving twist coefficient is 85, rear area draft is 1.17 times, total draft is 8.24 times, roller center distance is 52×54mm, roller pressure is 26×15× 22N.

(5) Spinning process: the front roller speed is 210r/min; the twist coefficient is 360; the nip gap is 3.0mm; the rear draft ratio is 1.175 times; the total draft ratio is 44.7 times; the roller pressure is 16×12 ×16daN.

Example 3

A production method of 14.5tex corn fiber and regenerated hemp fiber blended antibacterial composite yarn, the blending ratio is: corn fiber accounts for 30 parts, regenerated hemp fiber accounts for 70 parts, and the detailed steps of the process are as follows.

1. Process flow:

Same as Example 1

2. Spinning process parameters

(1) Corn fiber opening and cleaning, carding, pre-merging process

Same as Example 1

(2) Regenerated hemp fiber opening and cleaning, carding, pre-merging process

Same as Example 1

(3) Drawing process Quantitative cooked bar (g/5m) combined root number Total draft multiple Roller center distance(mm) Roller pressurization (N) corn fiber pre-consolidation 18.52 6 6.47 45×48 196×294×392×392 regenerated hemp fiber 21.61 6 6.49 45×48 mix one 16.79 2PLA/4H 7.35 47×51 mix two 16.09 6 6.13 47×51 mixed three 15.54 6 6.21 45×48

(4) Roving process: roving basis weight is 4.022g/10m, roving twist coefficient is 75, rear draft is 1.24 times, total draft is 7.73 times, roller center distance is 52×54mm, roller pressure is 26×14× 14N.

(5) Spinning process: the front roller speed is 220r/min; the twist coefficient is 330; the nip gap is 3.0mm; the rear draft ratio is 1.21 times; the total draft ratio is 30.84 times; the roller pressure is 14×10 ×14daN.

Claims (4)

1. An antibacterial composite yarn blended with corn fiber and regenerated hemp fiber, characterized in that the antibacterial composite yarn includes 30-60 parts of corn fiber and 40-70 parts of regenerated hemp fiber, the unit is parts by mass. 2. The corn fiber and regenerated hemp fiber blended antibacterial composite yarn according to claim 1, characterized in that the regenerated hemp fiber is regenerated from one or more of hemp short hemp, hemp drop, hemp stalk and stalk core produced fibers. 3. The production method of corn fiber and regenerated hemp fiber blended antibacterial composite yarn as claimed in claim 1, a, raw material preparation: 30 to 60 parts of corn fiber and 40 to 70 parts of regenerated hemp fiber are respectively sequentially opened and cleaned , carding, and pre-merging processes for later use; the unit is parts by mass; When opening and cleaning corn fiber, the speed of the carding cylinder is controlled at 600-700r/min, and the speed of the beater is controlled at 800-900r/min; When opening and cleaning the regenerated hemp fiber, the speed of the carding cylinder is controlled at 500-600r/min, and the speed of the beater is controlled at 700-800r/min; When carding corn fiber or regenerated hemp fiber, the speed of the cylinder is controlled at 280-330r/min, the speed of the licker-in roller is controlled at 600-850r/min, and the surface speed ratio of the cylinder and the licker-in roller is controlled at 2-2.5. At the same time, raise the feeding board by 1-2 mm, increase the distance between the feeding board and the licker-in roller, increase the line speed ratio between the licker-in roller and the cylinder, and reduce the distance between the doffer and the cylinder; b. After the pre-combined corn fiber and regenerated hemp fiber are drawn, roving, spun and wound in sequence, the blended antibacterial composite yarn of corn fiber and regenerated hemp fiber is obtained. 4. The production method of corn fiber and regenerated hemp fiber blended antibacterial composite yarn as claimed in claim 3, characterized in that: in the process of opening and cleaning cotton, the beater adopts a comb needle beater or a comprehensive beater; Press, medium weight, low speed", the draft in the rear area is larger than that of pure cotton spinning, the draft of front tension and the draft of back tension are smaller than that of pure cotton spinning, about equal to 1, increase the tension after the machine; the roving process "big gauge , heavy pressure", and at the same time appropriately increase the twist coefficient of the roving. In the spinning process, pay attention to the selection of the traveler and the selection of the twist of the yarn. The twist coefficient is 330-380. The speed of the traveler should not be too high, and the appropriate weight of the traveler should be selected.