CN105177784B - Technique that a kind of aramid fiber production high-tenacity is twisted thread and products thereof - Google Patents

Technique that a kind of aramid fiber production high-tenacity is twisted thread and products thereof Download PDF

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CN105177784B
CN105177784B CN201510701067.2A CN201510701067A CN105177784B CN 105177784 B CN105177784 B CN 105177784B CN 201510701067 A CN201510701067 A CN 201510701067A CN 105177784 B CN105177784 B CN 105177784B
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aramid fiber
speed
roller
tenacity
humidity
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CN105177784A (en
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陈传镒
晏顺芝
李明烈
李孝明
杨雪琴
鲁连华
张阳
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Jihua 3509 Textile Co Ltd
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Jihua 3509 Textile Co Ltd
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Abstract

The invention belongs to textile technology field, and in particular to technique that a kind of aramid fiber production high-tenacity is twisted thread and products thereof, it is:Aramid fiber through blowing, cotton carding, drafting, rove, spun yarn, winder, folding, twist thread, winding procedure is produced high-tenacity wound packages and twisted thread.Using it is produced by the invention twist thread have the advantages that high-tenacity, high abrasion, high temperature resistant, good fire-retardant, resistance to flexibility, low-shrinkage, steady chemical structure, burning without molten drop, do not produce poison gas, application is quite varied.

Description

Technique that a kind of aramid fiber production high-tenacity is twisted thread and products thereof
Technical field
The invention belongs to textile technology field, and in particular to technique and its production that a kind of aramid fiber production high-tenacity is twisted thread Product.
Background technology
Aramid fiber is a kind of new high-tech synthetic fibers, with superhigh intensity, high-modulus and high temperature resistant, acidproof resistance to The premium properties such as alkali, lightweight, insulation, anti-aging, life cycle length, be widely used in composite, ballistic-resistant article, building materials, The fields such as special type protection clothes, electronic equipment.
Aramid fiber has some good characteristics as a kind of new high-tech synthetic fibers:One is that aramid fiber has Good mechanical property.Its fracture strength is higher than ordinary polyester, cotton, nylon etc., and elongation is larger, soft, spinnability It is good, different fiber numbers, the chopped fiber of length and long filament can be produced into, yarn with different, which is made, in general textile machine is made into fabric, nothing Cloth is spun, by Final finishing, the requirement of the protective clothes of different field is met.Two to be that aramid fiber has excellent fire-retardant, heat-resisting Performance.Have benefited from its special chemical constitution, its anti-flammability will not be because of use time and washing times reduction or forfeiture.And It will not melt under the high temperature conditions, melt drop, just start charing when temperature is more than 370 DEG C.Three be that aramid fiber has stable chemistry Property.Aramid fiber is resistant to that alkaline resistance properties under the inorganic acid of most of high concentrations, normal temperature is good, and has the property for being resistant to most of chemical substances Energy.Four be that aramid fiber has radiation resistance.For example penetrated in the γ of 1.2 × 10~2w/in2 ultraviolets and 1.72 × 108rads Under the long-time irradiation of line, its intensity still keeps constant.Five be that aramid fiber has durability.Washed even in have passed through 100 times After washing, the cloth tearing brute force processed with aramid fiber can still reach more than the 85% of former strength.Therefore, aramid fiber material Aircraft, automobile, the fire-retardant interior trim and fabric of high ferro are suitably done, flak jackets, bulletproof halmet, bulletproof armour etc. can also be made, disappears Anti- clothes, smoke helmet, army and police's BDU, fire blanket, escaping rope, flame-retardant curtain, bedcover, nightwear, tablecloth, apron, micro-wave oven hand Set etc..The various excellent properties of aramid fiber have obtained extensive concern, aramid fiber in military field and civil area By with broader market development prospect.
But there is problems with aramid fiber:Sliver is caused easily to block up horn mouth 1. aramid fiber is very fluffy, coherent is poor. 2. aramid fiber easily produces electrostatic, easily produce viscous volume, around roller, twine roller phenomenon, influence the spinnability of aramid fiber.3. This, which is twisted thread, to require especially high for producing high-tenacity base fabric, therefore to strength, and fiber strength is protected in production process, to be solved Certainly easily de- knot, the problem of influenceing yarn strength because of tieing.
The content of the invention
The present invention is directed to above-mentioned present situation, it is desirable to provide one kind has resistance to high intensity, high abrasion, high temperature resistant, fire-retardant, resistance to softness Property good, low-shrinkage, steady chemical structure, burning the high-grade base fabric method twisted thread of poison gas is produced without molten drop, not.
The implementation of the object of the invention is that a kind of aramid fiber produces the technique that high-tenacity is twisted thread, and it includes following step Suddenly:
1) cotton cleaning process
Griping cotton machine hired roughneck decrease speed 2.8~3.2mm every time, 940~980r/min of rotating speed, rotary machinery speed 2.6~ 3.0r/min, blade stretches out 2.8~3.2mm of rib, 780~820r/min of Beater Speed, 940~960r/min of fan speed, Hired roughneck and 11~13mm of gauge of pedal roller, 20~25 DEG C of temperature, humidity more than 65%, 11~13r/ of lap roller speed Min, the quantification of 356~360g/m of lap dry weight of aramid fiber, lap length are 30.4~30.8m;
2) carding step
260~300r/min of cylinder speed, 580~600r/min of licker-in speed, 15.8~16.0r/min of doffer speed, 68~72mm/min of cover plate speed, cylinder and licker-in gauge 6~8 English silk, feed plate and the English of licker-in gauge 13~15 silk, cylinder with Doffer's gauge 3~5 English silk, cylinder and 5 gauges of cover plate are the English silk of the English silk of the English silk of the English silk of 12 English silk × 11 × 10 × 10 × 11, are removed Dirt knife up degree is put down with machine frame, the knife back and 90 ° of machine frame horizontal plane angle, 20~25 DEG C of temperature, humidity more than 65%;
3) mixing in doubling step
Aramid fiber by three roads and and, using 8 and and, quantitative 17.7~17.9g/5 meters of dry weight in the lump two and are done 16.90~17.00g/5 meters of big ration, three and quantitative 16.90~17.00g/5 meters of dry weight, horn mouth 3mm, 20~25 DEG C of temperature, Humidity more than 65%;
4) Roving Frames
2.8~3.0 sth. made by twisting of roving twist/10cm, roller gauge uses 11mm × 32mm × 42mm, back area draft 1.1~1.3 Times, 6.4~6.6mm of nip gauge, rove dry weight is quantification of 5.60~5.80g/10 meters, weight drafting multiple 5.91~5.95 Times, 6.00~6.10 times of mechanical commutation draft, front roller 210~230r/min of rotating speed, 5.90~6.00g/10m of weight in wet base, special number 30.1 ~30.5tex, twist factor 70~72, front roller 27~29mm of diameter, pressing device winding number 2 is enclosed, 20~25 DEG C of humiture, humidity 65% More than;
5) spinning process
19.6~20.0 times of weight drafting multiple, 20.58~20.60 times of mechanical commutation draft multiple, roller gauge be 24mm × 45mm, back zone drafting multiple is 1.1~1.3 times, 3~5mm of nip gauge, front roller 26~28mm of diameter, spindle rotating speed 14400 ~14600r/min, 48~50 sth. made by twisting of the twist/10cm, twist factor 260~280,20~25 DEG C of temperature, humidity more than 65%;
6) winding procedure
Electronic yarn clearer parameter:N:300%th, S:150%1.5cm, L:30%30cm, T:~40%30cm is 20~25 DEG C of temperature, wet Degree more than 65%, produces aramid fiber 30.3tex single thread;
7) folding process
Produced on doubling machine, two yarns are coiled into folding bobbin side by side, both sides uniform tension in order, tension pulley using 2.8~ 3.2g, 1420~1460 turns/min of main motor rotating speed, front roller 283.0~284.0m/min of linear velocity, groove drum diameter 85~ 87mm, 20~25 DEG C of temperature, humidity more than 65%, produces the doubling of aramid fiber 30.3tex × 2;
8) twisting process
Produced on twisting machine, strand is made by the single thread merged by two, 49.4~49.8 sth. made by twisting of the twist/10cm are twisted with the fingers Coefficient is 382~384, front roller 11.5~12.5m/min of linear velocity, and 20~25 DEG C of temperature, humidity more than 65% produce virtue Synthetic fibre 30.3tex × 2 are twisted thread;
9) winding procedure
Produced on bobbin-winding machine, using electronic type yarn clearer, 580~620m/min of speed, 20~25 DEG C of temperature, humidity More than 65%, the high-tenacity for producing aramid fiber 30.3tex × 2 is twisted thread.
Specifically, flat-clothing MCBH40D, Bearded-needle knitted cloth AC2030*01550, doffer's pin cloth AD4030*01890P~1, Taker-in roller wire AT5610*05611.
It is preferred that, aramid fiber is pre-processed in spinning process, by antistatic agent solution during cotton is grabbed Even is sprayed on aramid fiber.The antistatic agent solution can be environmental protection type antistatic agent FK-305 etc..
It is preferred that, install humidifier apparatus on automatic plucker additional, it is by humidifier apparatus that the antistatic agent solution is equal Even spraying is on aramid fiber.
It is preferred that, after aramid fiber is coiled on lapper, in 20~25 DEG C of temperature, the humidification of humidity 65~75% Place 24 hours, after the antistatic agent solution is by aramid fiber uniform pickup, enter back into carding step.
It is preferred that, each operation is using humidification moist keeping measures, and regain is maintained between 8.5~9.5%.
It is preferred that, roller used in each operation is handled with antistatic coating, and drafting, rove roller are applied with pen, spun yarn Roller is applied with plate.
Specifically, the equipment that is used of each step for:A002C type automatic pluckers;A035C mixed cotton slitters;A036B porcupines Opener;A092A type tandem feeders;A076C type lappers;A186 carding machines;FA317 drawing frames;FA411 fly frames; DTM169 spinning frames;21C~S bobbin-winding machines;1381 doubling winders;A631 twisting machines;1332M bobbin-winding machines;Rings model PG1/ 4254th, wire loop model 69032/0.
Specific, the aramid fiber:Fracture strength 190CN/tex, fracture strength 2.76GPa, modulus of elasticity 44N/ Tex, elongation at break 4%, line density 2.2dtex, length 51mm, regain 7.0%
On the basis of above-mentioned technical proposal, technical scheme preferably is as follows:
Aramid fiber through blowing, cotton carding, drafting, rove, spun yarn, winder, folding, twist thread, winding procedure produce it is high-strength Power wound packages twisted thread, and production is comprised the following steps that:
1) cotton cleaning process
Griping cotton machine hired roughneck's decrease speed each 3mm, rotating speed 960r/min, rotary machinery speed 2.8r/min, blade stretch out The gauge 12mm of rib 3mm, Beater Speed 800r/min, fan speed 950r/min, hired roughneck and pedal roller, humiture 20~ 25 DEG C more than 65%;Lap roller speed 12r/min, the quantification of 358g/m of aramid fiber lap dry weight, lap length in production For 30.6m;
2) carding step
Cylinder speed 280r/min, licker-in speed 590r/min, doffer speed 15.9r/min, cover plate speed 70mm/min, Cylinder and the English of licker-in gauge 7 silk, feed plate and the English of licker-in gauge 14 silk, cylinder and 5 points of the English of doffer's gauge 4 silk, cylinder and cover plate Gauge is the English silk of the English silk of the English silk of the English silk of 12 English silk × 11 × 10 × 10 × 11, and mote knife height and machine frame are flat, the knife back and machine frame water 90 ° of plane included angle, 20~25 DEG C of temperature, humidity more than 65%;
3) mixing in doubling step
Aramid fiber by three roads and and, using 8 and and, quantitative 17.8g/5 meter of dry weight in the lump, two and dry weight is quantitative 16.95g/5 meters, three and quantitative 16.95g/5 meters of dry weight, horn mouth 3mm, 20~25 DEG C more than 65% of humiture;
4) Roving Frames
Roving twist 2.9 twists with the fingers/10cm, and roller gauge uses 11mm × 32mm × 42mm, 1.2 times of back area draft, jaw every Away from 6.5mm, rove dry weight is quantification of 5.70g/10 meters, 5.93 times of weight drafting multiple, 6.05 times of mechanical commutation draft, front roller rotating speed 220r/min, weight in wet base 5.95g/10m, special number 30.3tex, twist factor 71, front roller diameter 28mm, pressing device winding number 2 is enclosed, humiture 20~25 DEG C more than 65%;
5) spinning process
19.8 times of weight drafting multiple, 20.59 times of mechanical commutation draft multiple, roller gauge is 24mm × 45mm, back area draft Multiple is 1.2 times, and nip gauge 4mm, front roller diameter 27mm, spindle rotating speed 14500r/min, the twist 49 twist with the fingers/10cm, twists with the fingers system Number 270, rings model PG1/4254, wire loop model 69032/0,20~25 DEG C of humidity more than 65% of temperature;
6) winding procedure
Produced on automatic winder, using electronic yarn clearer and empty sth. made by twisting without knot technology, electronic yarn clearer parameter:N:300%th, S: 150%1.5cm, L:30%30cm, T:~40%30cm, 20~25 DEG C of temperature, humidity more than 65%, produces aramid fiber 30.3tex single thread;
7) folding process
Produced on 1381 type doubling machines, two yarns are coiled into folding bobbin side by side, it is ensured that both sides uniform tension in order, tension pulley is adopted With 3g, 1440 turns/min of main motor rotating speed, front roller linear velocity 283.5m/min, groove drum diameter 86mm, 20~25 DEG C of temperature, Humidity more than 65%, produces the doubling of aramid fiber 30.3tex × 2;
8) twisting process
Produced on A631 twisting machines, the strand that strength is high, structure is good is made by the single thread merged by two.The twist 49.6 sth. made by twisting/10cm, twist factor is 383, front roller linear velocity 12m/min, and 20~25 DEG C of temperature, humidity more than 65% are produced Aramid fiber 30.3tex × 2 are twisted thread;
9) winding procedure
Produced on 1332M bobbin-winding machines, using electronic type yarn clearer.Speed 600m/min, 20~25 DEG C of temperature, humidity More than 65%, the high-tenacity for producing aramid fiber 30.3tex × 2 is twisted thread.
Wherein, aramid fiber:Fracture strength 190CN/tex, fracture strength 2.76GPa, modulus of elasticity 44N/tex, fracture Elongation 4%, line density 2.2dtex, length 51mm, regain 7.0%.
Twisted thread present invention also offers the high-tenacity obtained according to above-mentioned technique.
Aramid fiber through blowing, cotton carding, drafting, rove, spun yarn, winder, folding, twist thread, winding procedure produce it is high-strength Power wound packages is twisted thread.Cotton cleaning process using short route, grab less duty grab, more comb beat less, big gauge, it is thin hello fall less;Carding step emphasis A point comb degree, appropriate reduction cylinder and doffer speed, increase cylinder and licker-in surface speed ratio are solved, and suitably increases cylinder and cover plate Between gauge increase comb transfer, fiber is protected to greatest extent and the generation of cotton knot is reduced;Mixing in doubling step ensures sliver weight not The improvement of even rate, using 8 and is closed, three roads and and, and hooked fibre is reduced, using light quantitative, pressurization, low velocity again;Rove Process is using light quantitative, low velocity, the small twist, small tension receiving coil;Spinning process uses the twist less than normal, low ingot speed, rubber roll pressure.Using It is produced by the invention twist thread it is steady with high-tenacity, high abrasion, high temperature resistant, good fire-retardant, resistance to flexibility, low-shrinkage, chemical constitution It is fixed, burn without molten drop, do not produce poison gas the advantages of, application is quite varied.
Embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit Determine the scope of the present invention.
The present invention is twisted thread with aramid fiber production high-tenacity wound packages.
The selection of raw material and producing line equipment, it is specific as follows:
Aramid fiber:Fracture strength 190CN/tex, fracture strength 2.76GPa, modulus of elasticity 44N/tex, elongation at break 4%th, line density 2.2dtex, length 51mm, regain 7.0%.
Aramid fiber production line using A002C types automatic plucker → A035C mixed cotton slitters → A036B porcupine openers → A092A types tandem feeder → A076C types lapper → A186 carding machines → FA317 drawing frames → FA411 fly frames → DTM169 spinning frames → 21C~S bobbin-winding machines → 1381 doubling winders → A631 twisting machines → 1332M bobbin-winding machines.
What is produced comprises the following steps that:
1) cotton cleaning process
Aramid fiber regularity is good, free from foreign meter, and to protect fiber to try one's best less to be damaged, so in traditional technique stream This road technological process of reduction A035C mixed cotton slitters on the basis of journey, reduces the strike of A035C porcupines hired roughneck parallel with two, reduces The damage of fiber.To improve in process of production simultaneously the mechanical running rate of griping cotton machine and hopper (general more than 85%), suitably Improve coiled fan speed, it is ensured that producing wound laps are good.Cotton efficiency is grabbed to improve disk, griping cotton machine hired roughneck's decrease speed is each 3mm, rotating speed 960r/min, rotary machinery speed 2.8r/min, blade stretch out rib 3mm, accomplish that duty is grabbed and grab less, make fiber abundant The gauge 12mm of mixing, Beater Speed 800r/min, fan speed 950r/min, hired roughneck and pedal roller, humiture 20~25 DEG C more than 65%;Lap roller speed 12r/min, the quantification of 358g/m of aramid fiber lap dry weight in production, lap length is 30.6m.Because aramid fiber is very fluffy, electrostatic is also easy to produce, so installing humidifier dress additional on A002C type automatic pluckers Put, elected as through repetition test end formulation and solution is made with 4% water and 0.9% special antistatic additive, then pass through humidifier This solution is uniformly sprayed on aramid fiber by device during cotton is grabbed.Aramid fiber on A076C type lappers into It is lower between 20~25 DEG C of temperature, the humidification of humidity 65~75% to place 24 hours after volume, treat antistatic agent solution by aramid fiber After uniform pickup, carding step is entered back into.
2) carding step
Cotton carding is produced on A186 carding machines, because aramid fiber is very fluffy, easily blocks up horn mouth, therefore increase pressure roller Amount of pressurization, by gently quantitative technological principle, so that sliver is tried one's best closely, reduces stifled loudspeaker lip reflex as far as possible.Another emphasis It is to solve a point comb degree, realizes single fiber and drop low-fiber fatigue damage to greatest extent, appropriate reduction cylinder and doffer speed, Increase cylinder and licker-in surface speed ratio, and suitably increase the gauge increase between cylinder and cover plate and comb transfer, reduce the production of cotton knot It is raw.Cylinder speed 280r/min, licker-in speed 590r/min, doffer speed 15.9r/min, cover plate speed 70mm/min, cylinder With the English of licker-in gauge 7 silk, feed plate and the English of licker-in gauge 14 silk, cylinder and the English of doffer's gauge 4 silk, cylinder and 5 gauges of cover plate For the English silk of the English silk of the English silk of the English silk of 12 English silk × 11 × 10 × 10 × 11, mote knife height and machine frame are flat, the knife back and machine frame horizontal plane 90 ° of angle, 20~25 DEG C of temperature, humidity more than 65%.Make cylinder good with the pin between cog carding effect of cover plate two, Bearded-needle knitted cloth choosing With less operating angle and pin tooth height, pin cloth model used:Flat-clothing MCBH40D, Bearded-needle knitted cloth AC2030*01550, road Husband's pin cloth AD4030*01890P~1, taker-in roller wire AT5610*05611.Quarantine measures are taken in production process, bar cylinder is with modeling Expect sheet lid, prevent aramid fiber from being flown away everywhere because fluffy, cause other products fiber mistake occur mixed.
3) mixing in doubling step
Drafting is produced on FA317 drawing frames, because aramid fiber is very fluffy, to prevent Severe blockage horn mouth, and Bar quantitatively will be controlled gently partially;It is in addition small-bore horn mouth changing in production process, sliver is tried one's best closely;And reduce out Bar speed, it is ensured that horn mouth, circle of inclined tube passage are smooth, bell-mouthed situation is blocked up to discongest sliver.Sliver weight unevenness ratio It is larger, thus use three roads and and, and using 8 and and, quantitative 17.8g/5 meter of dry weight in the lump, two and dry weight quantifies 16.95g/ 5 meters, three and quantitative 16.95g/5 meters of dry weight, horn mouth 3mm, 20~25 DEG C more than 65% of humiture.To avoid roller from twining flower, skin Roller is handled with antistatic additive coating, and by the way of pen painting.Bar cylinder uses plastics sheet lid, regain is maintained at 9% Quarantine measures are taken in left and right, production process, prevent aramid fiber from being flown away everywhere because fluffy, cause other products fiber occur wrong It is mixed.
4) Roving Frames
Rove is produced on FA411 fly frames, because aramid fiber strength is higher, for ease of spun yarn drafting, roving twist Less than normal to grasp, roving twist 2.9 twists with the fingers/10cm, and roller gauge uses 11mm × 32mm × 42mm, 1.2 times of back area draft, jaw every Away from 6.5mm, rove dry weight is quantification of 5.70g/10 meters, 5.93 times of weight drafting multiple, 6.05 times of mechanical commutation draft, front roller rotating speed 220r/min, weight in wet base 5.95g/10m, special number 30.3tex, twist factor 71, front roller diameter 28mm, pressing device winding number 2 is enclosed, humiture 20~25 DEG C more than 65%.To avoid roller from twining flower, roller is handled with antistatic additive coating, and by the way of pen painting.Will Strengthen operation cleaning, it is ensured that horn mouth and the channel part cleaning of circle bar disk, no burr, wounded, product flower etc..Simultaneously in order to avoid meaning Outer drawing-off, the tension force of rove also wants control less than normal, and tension bracket is flexible, and tension force is uniform, strict control rove front row, heel row, Large, medium and small yarn Roving Elongation and variance rate, rove elongation control is within 1.2%, variance rate control is within 0.5%.It is raw Quarantine measures are taken during production, prevent aramid fiber from being flown away everywhere because fluffy, cause other products fiber mistake occur mixed.
5) spinning process
Spun yarn is produced on DTM169 type spinning frames.Because it is finally that two strands of high-tenacity to be produced are twisted thread, and weak twist The ply yarn stength of single thread is larger, is selected so ramie yarn twist is less than normal.The twist 49 twists with the fingers/10cm, twist factor 270, weight drafting multiple 19.8 times, 20.59 times of mechanical commutation draft multiple, roller gauge is 24mm × 45mm, and back zone drafting multiple is 1.2 times, nip gauge 4mm, front roller diameter 27mm, spindle rotating speed 14500r/min, rings model PG1/4254, wire loop model 69032/0, 20~25 DEG C of humidity more than 65% of temperature;To avoid roller from twining flower, roller is handled with antistatic additive coating, and applied using plate Mode.Isolation processing is carried out with plastic cloth in production process, prevents aramid fiber to be mixed into adjacent board, causes other products to occur Fiber mistake is mixed.
6) winding procedure
Single thread winder is produced on the automatic winder in Japanese village field.Use Wu Site electronic yarn clearers and empty sth. made by twisting nothing Knot technology, it is ensured that yarn defect is effectively removed.Because the yarn of production is more smooth, tieing is easily slided when being knotted on automatic winder It is de-, therefore increase on automatic winder conventional supercharging device, it is ensured that stable gas pressure, so that it is guaranteed that the strength after tieing can reach To the 80% of raw yarn.Electronic yarn clearer parameter:N:300%th, S:150%1.5cm, L:30%30cm, T:~40%30cm, temperature 20~25 DEG C, humidity more than 65%, produce aramid fiber 30.3tex wound packages single thread.
7) folding process
Folding is produced on 1381 type doubling machines, and spool answers parallel contact on support roller, and feed carrier also must be with Support roller is parallel, and two yarns are coiled into folding bobbin side by side, it is ensured that both sides uniform tension in order;Ensuring the good premise of tube forming Under, yarn tension should be as far as possible small, to protect the elasticity and strength of raw yarn.Tension pulley uses 3g, and 1440 turns of main motor rotating speed/ Min, front roller linear velocity 283.5m/min, groove drum diameter 86mm, 20~25 DEG C of temperature, humidity more than 65% produce aramid fiber The doubling of 30.3tex × 2.
8) twisting process
Twist thread and produced on A631 twisting machines, the strand that strength is high, structure is good is made by the single thread merged by two.Stock The twist factor that the twist factor of line should combine single thread consider, and the twist of single thread is less than normal, therefore twist thread can be inclined with the ratio of twist of single thread Big, to reach preferable ply yarn stength, the twist 49.6 twists with the fingers/10cm, and twist factor is 383, front roller linear velocity 12m/min, temperature 20~25 DEG C, humidity more than 65% are spent, twisting thread for aramid fiber 30.3tex × 2 is produced.
9) winding procedure
Winder of twisting thread is produced on 1332M bobbin-winding machines, using electronic type yarn clearer, using the metal channels conducted electricity very well In the hope of eliminating electrostatic;The certain humiture in workshop is kept in addition, if necessary using spraying humidification, on the one hand can be reduced quiet Electricity, can be stabilized the twist of yarn in addition.Speed 600m/min, 20~25 DEG C of temperature, humidity more than 65%, are produced The high-tenacity strand of aramid fiber 30.3tex × 2.
The ultimate strength of common aramid fiber strand is in 1410CN or so, the ultimate strength of the strand obtained by present invention process 1580CN or so is can reach, its fracture strength is apparently higher than common aramid fiber strand.
The better embodiment of the present invention is the foregoing is only, is not intended to limit the invention, all spirit in the present invention Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims (9)

1. the technique that a kind of aramid fiber production high-tenacity is twisted thread, it is characterised in that comprise the following steps:
1) cotton cleaning process
Griping cotton machine hired roughneck decrease speed 2.8~3.2mm, 940~980r/min of rotating speed, 2.6~3.0r/ of rotary machinery speed every time Min, blade stretches out 2.8~3.2mm of rib, 780~820r/min of Beater Speed, fan speed 940~960r/min, Da Shouhe 11~13mm of gauge of pedal roller, 20~25 DEG C of temperature, humidity more than 65%, lap roller 11~13r/min of speed, aramid fiber Quantification of 356~the 360g/m of lap dry weight of fiber, lap length is 30.4~30.8m;
2) carding step
260~300r/min of cylinder speed, 580~600r/min of licker-in speed, 15.8~16.0r/min of doffer speed, cover plate 68~72mm/min of speed, cylinder and the English of licker-in gauge 6~8 silk, feed plate and the English of licker-in gauge 13~15 silk, cylinder and doffer Gauge 3~5 English silk, cylinder and 5 gauges of cover plate are the English silk of the English silk of the English silk of the English silk of 12 English silk × 11 × 10 × 10 × 11, mote knife Height is flat with machine frame, the knife back and 90 ° of machine frame horizontal plane angle, 20~25 DEG C of temperature, humidity more than 65%;
3) mixing in doubling step
Aramid fiber by three roads and and, using 8 and and, quantitative 17.7~17.9g/5 meter of dry weight in the lump, two and dry weight is fixed Amount 16.90~17.00g/5 meter, three and dry weight quantitatively 16.90~17.00g/5 meters, horn mouth 3mm, 20~25 DEG C of temperature, humidity More than 65%;
4) Roving Frames
2.8~3.0 sth. made by twisting of roving twist/10cm, roller gauge use 11mm × 32mm × 42mm, 1.1~1.3 times of back area draft, 6.4~6.6mm of nip gauge, rove dry weight is quantification of 5.60~5.80g/10 meters, 5.91~5.95 times of weight drafting multiple, machine 6.00~6.10 times of tool drawing-off, front roller 210~230r/min of rotating speed, 5.90~6.00g/10m of weight in wet base, special number 30.1~ 30.5tex, twist factor 70~72, front roller 27~29mm of diameter, pressing device winding number 2 is enclosed, 20~25 DEG C of temperature, humidity 65% with On;
5) spinning process
19.6~20.0 times of weight drafting multiple, 20.58~20.60 times of mechanical commutation draft multiple, roller gauge is 24mm × 45mm, Back zone drafting multiple is 1.1~1.3 times, 3~5mm of nip gauge, front roller 26~28mm of diameter, spindle rotating speed 14400~ 14600r/min, 48~50 sth. made by twisting of the twist/10cm, twist factor 260~280,20~25 DEG C of temperature, humidity more than 65%;
6) winding procedure
Electronic yarn clearer parameter:N:300%th, S:150%1.5cm, L:30%30cm, T:~40%30cm, 20~25 DEG C of temperature, humidity More than 65%, produce aramid fiber 30.3tex single thread;
7) folding process
Produced on doubling machine, two yarns are coiled into folding bobbin, both sides uniform tension in order side by side, and tension pulley uses 2.8~3.2g, main 1420~1460 turns/min of motor speed, front roller 283.0~284.0m/min of linear velocity, groove drum 85~87mm of diameter, temperature 20~25 DEG C, humidity more than 65% are spent, the doubling of aramid fiber 30.3tex × 2 is produced;
8) twisting process
Produced on twisting machine, strand, 49.4~49.8 sth. made by twisting of the twist/10cm, twist factor is made by the single thread merged by two For 382~384, front roller 11.5~12.5m/min of linear velocity, 20~25 DEG C of temperature, humidity more than 65% produce aramid fiber 30.3tex × 2 are twisted thread;
9) winding procedure
Produced on bobbin-winding machine, using electronic type yarn clearer, 580~620m/min of speed, 20~25 DEG C of temperature, humidity 65% with On, the high-tenacity for producing aramid fiber 30.3tex × 2 is twisted thread.
2. the technique that aramid fiber production high-tenacity according to claim 1 is twisted thread, it is characterised in that:It is right in spinning process Aramid fiber is pre-processed, and antistatic agent solution is uniformly sprayed on aramid fiber during cotton is grabbed.
3. the technique that aramid fiber production high-tenacity according to claim 2 is twisted thread, it is characterised in that:On automatic plucker Install humidifier apparatus additional, be uniformly sprayed at the antistatic agent solution on aramid fiber by humidifier apparatus.
4. the technique that aramid fiber production high-tenacity according to claim 3 is twisted thread, it is characterised in that:Aramid fiber into On volume machine it is coiled after, placed 24 hours in 20~25 DEG C of temperature, the humidification of humidity 65~75%, treat that the antistatic additive is molten Liquid enters back into carding step by after aramid fiber uniform pickup.
5. the technique that aramid fiber production high-tenacity according to claim 4 is twisted thread, it is characterised in that:The comb of aramid fiber Pin cloth model used in cotton process:Flat-clothing MCBH40D, Bearded-needle knitted cloth AC2030*01550, doffer's pin cloth AD4030* 01890P~1, taker-in roller wire AT5610*05611.
6. the technique that aramid fiber production high-tenacity according to claim 4 is twisted thread, it is characterised in that:Each operation is used Moist keeping measures are humidified, regain is maintained between 8.5~9.5%.
7. the technique that aramid fiber production high-tenacity according to claim 4 is twisted thread, it is characterised in that:Each operation is used Roller handled with antistatic coating, drafting, rove roller are applied with pen, and spun yarn roller is applied with plate.
8. the technique twisted thread according to any described aramid fiber production high-tenacity of claim 1 to 7, it is characterised in that each step Suddenly the equipment used for:A002C type automatic pluckers;A035C mixed cotton slitters;A036B porcupine openers;The double cottons of A092A types Case cotton feeder;A076C type lappers;A186 carding machines;FA317 drawing frames;FA411 fly frames;DTM169 spinning frames;21C~S Bobbin-winding machine;1381 doubling winders;A631 twisting machines;1332M bobbin-winding machines;Rings is with model PG1/4254, wire loop model 69032/0。
9. the technique twisted thread according to any described aramid fiber production high-tenacity of claim 1 to 7, it is characterised in that described Aramid fiber:Fracture strength 190CN/tex, fracture strength 2.76GPa, modulus of elasticity 44N/tex, elongation at break 4%, line are close Spend 2.2dtex, length 51mm, regain 7.0%.
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