KR100626613B1 - Manufacturing apparatus of high tenacity polyethylene fiber - Google Patents

Abstract

Disclosed is an apparatus for producing ultra high strength polyethylene fibers, which can produce ultra high strength polyethylene fibers having high strength and high elongation, as well as completely extract a first solvent from gel fibers. The first supply supplies the first solvent metered in as required. The second supply part supplies the ultra high molecular weight polyethylene weighed to have a weight ratio of 5 to 20% by weight relative to 100% by weight of the first solvent. The agitator stirs the first solvent and the ultrahigh molecular weight polyethylene while maintaining a predetermined temperature atmosphere to obtain a mixed liquid in the form of a slurry. The conical dual axis ribbon mixer is a rotary mixing of the slurry in the form of a slurry to obtain a gelling solution. The melt extruder extrudes the gelling solution while maintaining the molten state. The gel fiber forming section spins and cools the molten extruded gelling solution to obtain gel fibers. The solvent extraction unit extracts the first solvent from the gel fiber by the second solvent, and transports the gel fiber from which the first solvent is extracted. The stretching section stretches the gel fibers from which the first solvent is extracted to obtain ultra high strength polyethylene fibers.

Ultra High Strength Polyethylene, Strength, Elongation

Description

Ultra High Strength Polyethylene Fiber Manufacturing Equipment {MANUFACTURING APPARATUS OF HIGH TENACITY POLYETHYLENE FIBER}

Figure 1 is a schematic diagram showing an ultra-high strength polyethylene fiber manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating in detail the mixer shown in FIG. 1.

3 is a configuration diagram showing in detail the screw conveyor shown in FIG.

4 is a perspective view showing in detail the first or second scale hopper shown in FIG.

5 is a configuration diagram showing in detail the stirrer shown in FIG.

FIG. 6 is a detailed view showing the conical dual axis ribbon mixer shown in FIG. 1 in detail.

FIG. 7 is a detailed view illustrating the melt extruder illustrated in FIG. 1.

FIG. 8 is an enlarged view illustrating the dice and the cooling tank of FIG. 1.

FIG. 9 is a plan view of the dice shown in FIG. 8. FIG.

10 is a perspective view showing in detail the extraction tank shown in FIG.

FIG. 11 is a detailed perspective view of the drawing unit illustrated in FIG. 1. FIG.

* Explanation of symbols for the main parts of the drawings

102: first supply part 104: second supply part

106: stirrer 108: conical dual axis ribbon mixer

110: melt extruder 112: gel fiber forming portion

114: stretcher 118: winder

120: recovery tank 122: first pump

123: connecting pipe 124: reservoir tank

126: second pump 128: first scale hopper

132: mixer 134: screw conveyor

136: second scale hopper 202: container

204: rotating shaft 206: motor

208: inner ribbon 210: outer ribbon

212: discharge damper 302: cylindrical case

304: screw 306: motor

308: discharge damper 402: container

404: load cell 406: discharge damper

502: container 504: rotation axis

506: motor 508: stirring blade

510: discharge damper 512: temperature sensor

602: reverse conical container 604: first axis of rotation

606: motor 608: drive bevel gear

610: driven bevel gear 612: second axis of rotation

614: ribbon 616: heater

618: thermometer 620: discharge damper

702: Case 704: Recovery Tank

706: heater 708: screw

710: motor 712: gear pump

802: dice 804: cooling tank

1002: extraction tank 1004: upper roller

1006: lower roller 1008: auxiliary roller

1010 pipe 1012 recovery tank

1014: auxiliary recovery tank 1102: roller

1104: hot tub

The present invention relates to an ultra high strength polyethylene fiber manufacturing apparatus, and more particularly, to an apparatus for producing an ultra high strength polyethylene fiber excellent in strength and elongation by solution melt spinning.

High-strength polyethylene fiber has been widely used in various fields in various fields due to its excellent mechanical properties such as high strength and high elongation and excellent chemical properties such as excellent chemical resistance.

As a method for producing such a high strength polyethylene fiber, there are an ultra high stretching method, a solid state extrusion method, a band stretching method, a gel spinning method, etc. Among these, a gel spinning method capable of mass production is widely used.

Conventionally, the tensile strength of polyethylene fibers produced by melt spinning by electric heaters is only 4-6 g / d.

The present invention for solving the above problems can not only produce a super-strength polyethylene fiber having a high strength and high elongation, but also completely extract the first solvent from the gel fiber and also the first solvent and the first solvent It is an object of the present invention to provide an apparatus for producing an ultra high strength polyethylene fiber which can be easily separated and reused from a second solvent extracted from gel fibers.

The present invention devised to achieve the above object is a first supply unit for supplying a first solvent metered in the required amount; A second supply part for supplying ultra high molecular weight polyethylene measured to have a weight ratio of 5 to 20% by weight with respect to 100% by weight of the first solvent; the ultra high molecular weight from the first solvent and the second supply part from the first supply part An agitator for stirring polyethylene while maintaining a predetermined temperature atmosphere to obtain a mixed liquid in the form of a slurry; A conical double shaft ribbon mixer obtained by rotationally mixing the slurry of the slurry form from the stirrer to obtain a gelling solution; A melt extruder for extruding the gelling solution from the conical dual axis ribbon mixer while maintaining a molten state; A gel fiber forming unit for spinning and cooling the molten extruded gelling solution from the molten extruder to obtain gel fibers; A solvent extracting unit for extracting a first solvent from a gel fiber formed by the gel fiber forming unit by a second solvent and transferring the gel fiber from which the first solvent is extracted; And stretching the gel fibers from which the first solvent has been extracted at a stretching ratio of 30 to 50: 1 to obtain an ultra high strength polyethylene fiber.

Preferably, the first supply portion recovery tank for recovering and storing the first solvent separated from the gelling solution by extrusion by the melt extruder; A first pump for pumping the first solvent stored in the recovery tank; A storage tank for storing the first solvent transferred from the first pump through a connecting pipe; A second pump pumping the first solvent stored in the oil storage tank in a predetermined amount unit to measure a weight; And a first scale hopper configured to receive and store the first solvent in the predetermined amount unit from the second pump. More preferably, the second supply unit is a mixer for mixing the ultra-high molecular weight polyethylene by moving up and down; A screw conveyor which receives the ultra high molecular weight polyethylene from the mixer while rotating and moves the unit by a predetermined amount; And a second scale hopper for receiving, storing, and discharging ultra high molecular weight polyethylene in a predetermined amount from the screw conveyor.

Most preferably, the mixer is a container for storing the ultra-high molecular weight polyethylene introduced through the raw material inlet formed in the upper portion; A rotating shaft rotatably installed to the left and right at the center of the side of the container; A motor connected to one end of the rotating shaft to transmit a rotating force to the rotating shaft; Inner and outer ribbons disposed around the rotary shaft to rotate simultaneously with the rotation of the rotary shaft to move and mix the ultra-high molecular weight polyethylene raw material contained in the container in opposite directions; And a discharge damper for discharging the ultrahigh molecular weight polyethylene mixed in the container.

According to an embodiment, the second scale hopper comprises: a container for storing the ultra high molecular weight polyethylene transferred from the screw conveyor through an inlet formed at an upper portion thereof; A load cell supporting the container; And a discharge damper installed under the container to discharge the ultra high molecular weight polyethylene stored in the container in a predetermined amount. According to an embodiment, the stirrer may include: a container having left and right inlets through which the ultra high molecular weight polyethylene and the first solvent are introduced; A rotating shaft installed across the container from the center up and down; A motor connected to an upper end of the rotating shaft; Stirring vanes fixedly installed at the front and center of the rotary shaft to obtain a slurry by stirring the ultrahigh molecular weight polyethylene and the first solvent; A discharge damper installed at a lower end of the container to discharge the slurry; A heater installed on an outer wall of the vessel to maintain a required process temperature from the outside, and heating the inside of the vessel; And a temperature sensor installed inside the container for sensing a temperature inside the container.

According to an embodiment, the conical double shaft ribbon mixer includes an inverted conical container for storing the mixed liquid in the form of slurry introduced from the stirrer through a supply port; A first rotating shaft installed obliquely up and down on one side of the inverted conical container; A motor connected to one end of the first rotational shaft and transmitting a rotational force to the first rotational shaft; A driving bevel gear fixed to an upper end of the first rotation shaft; A driven bevel gear that rotates in engagement with the drive bevel gear; A second rotating shaft extending from the driven bevel gear into the container; A pair of ribbons connected to the first and second rotation shafts to rotate simultaneously with the rotation of the first and second rotation shafts so that the mixed liquid contained in the inverted conical container flows left and right and mixed; A heater installed outside the inverted conical container to insulate the inverted conical container; A thermometer installed inside the inverted conical container and measuring an internal temperature of the inverted conical container; And a discharge damper installed under the container to discharge the gelling solution to the melt extruder.

Advantageously, the melt extruder includes a case for receiving the gelling solution from the mixer and having a hole formed at one lower end thereof for discharging a portion of the first solvent contained in the gelling solution to the first supply unit; A heater installed outside the case to maintain the gelling solution in a molten state; A screw installed inside the case and rotating to transfer the gelling solution maintained in the molten state to the heater; A motor fixed to one end of the screw to transmit rotational force to the screw; And a gear pump for pumping the gelling solution from the screw to a gel fiber forming portion. Advantageously, the gel fiber forming portion includes a cooling bath for spinning the melt extruded gelling solution from the melt extruder through a die and cooling the gelling solution from the die with cooling water.

Advantageously, the solvent extracting unit comprises: an extraction tank containing a second solvent impregnating gel fibers formed by the gel fiber forming unit; A plurality of rollers installed in the extraction tank at predetermined intervals to extract the first solvent impregnated in the second solvent by passing the gel fibers formed in the gel fiber forming unit by a rotation operation; A pipe for transporting the gel fibers from which the first solvent has been extracted by the plurality of rollers; A recovery tank for recovering the first and second solvents extracted from the extraction tank through an overflow pipe and supplying the second solvent to the extraction tank through a recovery pipe; And an auxiliary recovery tank for receiving and storing the first solvent from the recovery tank and supplying the first solvent to the first supply unit. Advantageously, the stretching portion is provided with a plurality of rollers spaced apart from each other by a predetermined distance to compress and stretch the gel fibers from which the first solvent is extracted; And a plurality of hot tubs respectively installed at rear ends of the plurality of rollers to discharge hot air to the stretched gel fibers.

Hereinafter will be described in detail with respect to the ultra-high strength polyethylene fiber manufacturing apparatus of the present invention.

Figure 1 is a schematic diagram showing an ultra-high strength polyethylene fiber manufacturing apparatus according to an embodiment of the present invention.

Ultra high strength polyethylene fiber manufacturing apparatus according to an embodiment of the present invention, the first supply unit 102, the second supply unit 104, the stirrer 106, the conical ribbon mixer 108, the melt extruder 110, gel fiber forming unit (112), the stretching portion 116, and the winder (118).

The first supply part 102 supplies the first solvent metered in as required. And the first solvent for dissolving the ultra-high molecular weight polyethylene may be used paraffin oil, xylene, toluene, trichlorobenzene, etc. commonly used in the prior art, it is preferable to use a hydrocarbon solvent having a boiling point of 350 ℃ or more. This is because the solubility in ultra high molecular weight polyethylene is excellent and the extraction is made smoothly by the second solvent during the extraction process, and it is not only reusable but also excellent in handling since there is no risk of fire. The hydrocarbon solvent is petroleum mineral oil, mineral oil and the like. The first supply unit 102 includes a recovery tank 120, a first pump 122, a reservoir tank 124, a second pump 126, and a first scale hopper 128.

The recovery tank 120 recovers and stores the first solvent separated from the gelling solution by extrusion by a melt extruder which will be described later. The first pump 122 pumps the first solvent stored in the recovery tank 120. The reservoir tank 124 stores the first solvent transferred from the first pump 122 through the connection pipe 123. The second pump 126 pumps the first solvent stored in the reservoir tank 124 in a predetermined amount unit to measure the weight. The first scale hopper 128 receives and stores and discharges the first solvent in the predetermined amount unit from the second pump 126. The first scale hopper 128 has the same structure as the second scale hopper 136 described later.

The second supply part 104 supplies the ultra high molecular weight polyethylene measured to have a weight ratio of 5 to 20% by weight relative to 100% by weight of the first solvent. The ultra high molecular weight polyethylene refers to both a case where the repeating unit is made of a homopolymer made of ethylene only, and the case where the repeating unit is made of a copolymer made of ethylene substantially and other monomo is copolymerized. . The second feed section 104 includes a mixer 132, a screw conveyor 134, and a second scale hopper 136.

The mixer 132 moves the ultra high molecular weight polyethylene up and down and mixes it. FIG. 2 is a detailed block diagram illustrating the mixer 132 shown in FIG. 1. The mixer 132 includes a vessel 202, a rotating shaft 204, a motor 206, inner and outer ribbons 208 and 210, and a discharge damper 212. The container 202 stores the ultra high molecular weight polyethylene introduced through the raw material inlet 203 formed in the upper portion. The rotating shaft 204 is rotatably installed to the left and right across the central portion of the side of the container 202. The motor 206 is connected to one end of the rotating shaft 204 and transmits a rotating force to the rotating shaft. Inner and outer ribbons 208 and 210 are disposed around the rotation axis 204 to rotate simultaneously with the rotation of the rotation axis 204 to move the ultra-high molecular weight polyethylene raw material stored in the container 202 in opposite directions. To mix. The discharge damper 212 discharges the ultra high molecular weight polyethylene mixed in the container 202.

In operation, when the raw material is introduced into the container 202 through the raw material inlet 203, the inner and outer ribbons 208 and 210 respectively transfer the raw materials to each other to cause raw material mixing. The diameter of the inner ribbon 208 is one half of the diameter of the outer ribbon 210 for the most suitable mixing of the raw materials, and the pitch of the inner and outer ribbons 208 and 210 is preferably equal to each other. The gap between the ends of the inner and outer ribbons 208 and 210 and the container 202 should be a gap of 1 to 3 mm or less for best mixing. The time for mixing 0.6 m ³ raw material at about 20 rpm of the motor rotation is about 2 minutes, and then the discharge damper 212 is opened.

The screw conveyor 134 rotates and receives the ultra high molecular weight polyethylene from the mixer and moves it in a predetermined amount unit. 3 is a diagram illustrating in detail the screw conveyor 134 shown in FIG. The screw conveyor 134 includes a cylindrical case 302, a screw 304, a motor 306, and a discharge damper 308.

The cylindrical case 302 is supplied with the mixed ultra high molecular weight polyethylene supplied from the mixer 132 through a supply port 303 formed thereon. Screw 304 is installed in the case 302 to move a certain amount of the ultra-high molecular weight polyethylene while rotating. The motor 306 is installed at one end of the screw 304 to drive the screw 304. The discharge damper 308 discharges the ultra high molecular weight polyethylene moved by the screw 304 in a predetermined amount unit. The second scale hopper 136 receives the ultra high molecular weight polyethylene in a predetermined amount from the screw conveyor 134 and stores and discharges the polyethylene. 4 is a perspective view showing in detail the scale hopper 136 shown in FIG. The second scale hopper 136 includes a vessel 402, a load cell 404, and a discharge damper 406. The container 402 stores the ultra high molecular weight polyethylene transferred from the screw conveyor 134 through the inlet 403 formed at the top. The load cell 404 supports the container 402. The discharge damper 406 is installed under the main body 402 to discharge the ultra high molecular weight polyethylene stored in the container 402 in a predetermined amount unit.

Referring to FIG. 4, the first scale hopper 128 and the second scale hopper 136 respectively mount a load cell 404 in order to accurately measure the weight, and an inlet 403 in the upper part, The discharge damper 406 is provided.

2 and 3, when the weight of the ultra high molecular weight polyethylene reaches the weight set in the second scale hopper 136 through the discharge damper 212 of the mixer 132, the screw conveyor 134 is stopped. do.

The stirrer 106 agitates the first solvent from the first supply part 102 and the ultra high molecular weight polyethylene from the second supply part 104 while maintaining a predetermined temperature atmosphere to obtain a mixed liquid in the form of a slurry.

FIG. 5 is a diagram illustrating in detail the stirrer 106 shown in FIG. 1.

The stirrer 106 includes a vessel 502, a rotating shaft 504, a motor 506, stirring vanes 508, a discharge damper 510, a heater 510, and a temperature sensor 512. The container 502 is a cylindrical shape of stainless steel composed of a volume of 0.4 to 0.5 m ³ and has left and right inlets 503 and 505 to which the ultra high molecular weight polyethylene and the first solvent are respectively input. The rotating shaft 504 is installed across the container 502 from the center up and down. The motor 506 is connected to the upper end of the rotating shaft 504 is installed. Stirred blades 508 are fixed to the front and center of the rotary shaft 504, respectively, to agitate the ultra-high molecular weight polyethylene and the first solvent to obtain a slurry. The discharge damper 510 is installed at the lower end of the container 502 to discharge the slurry. The heater 510 is installed on the outer wall of the container to maintain a required process temperature, that is, 130 ° C. from the outside, and heats the inside of the container 502. The temperature sensor 512 is installed inside the container 502 to sense the internal temperature of the container 502.

In operation, the discharge damper 510 is opened if the desired set temperature and the pressure of the conical dual axis ribbon mixer 108 is lower than the set pressure, and this slurry is passed through the conduit 514 to the conical dual axis ribbon mixer 108. Is transferred to.

The conical dual axis ribbon mixer 108 rotationally mixes the mixture in the form of the slurry from the stirrer 106 to obtain a gelling solution. That is, the ultra-high molecular weight polyethylene and the mineral oil as the first solvent are mixed up to 2 to 20% by weight and made into a gel state (the optimal titration ratio is 5% ultra-high molecular weight polyethylene of the mineral oil weight), and then the relative viscosity ratio is 12 to After reaching 40 dl / g, after passing through the air gap gap of 5 mm, pulling more than 1/5 from the air gap (at this time, blow the cooling wind at 1 m / min before reaching the surface of the cooling water, N ₂ gas is better). In this case, the intrinsic viscosity of the gelling solution of ultra high molecular weight polyethylene is preferably 17 to 23 dl / g. This is because stretching is performed smoothly because of having excellent crystallinity, and excellent strength and elongation can be obtained.

FIG. 6 is a detailed view of the conical dual axis ribbon mixer 108 shown in FIG. 1. The conical dual axis ribbon mixer 108 includes an inverted conical container 602, a first rotating shaft 604, a motor 606, a driving bevel gear 608, a driven bevel gear 610, a second rotating shaft 612. , A pair of ribbons 614, a heater 616, a thermometer 618, and a discharge damper 620.

The inverted conical container 602 is made of stainless steel consisting of a volume of 0.4 to 0.5 m ³ to store the mixed liquid in the form of the slurry introduced from the stirrer 106 through the feed port 603. The first rotation shaft 604 is installed obliquely up and down on one side of the inverted conical container 602. The motor 606 is connected to one end of the first rotation shaft 604 to transmit rotational force to the first rotation shaft 604 at a rotation speed of 20 rpm. The driving bevel gear 608 is fixed to the upper end of the first rotation shaft 604 is rotated in accordance with the rotation of the first rotation shaft 604.

The driven bevel gear 610 is rotated in engagement with the drive bevel gear 608. The second rotating shaft 612 extends from the driven bevel gear 610 into the container 602. A pair of ribbons 614 are connected to the first and second rotation shafts 604 and 612 to rotate simultaneously with the rotation of the first and second rotation shafts 604 and 612 to receive the mixed liquid contained in the inverted conical container. Flow by mixing from side to side. The pitch of the pair of ribbons 614 is the same, and a strong pumping action takes place at the bottom because the volume decreases toward the discharge damper 620. Through the pair of ribbons 614 the mixing of the inverted conical container 602 takes place from top to bottom and from center to bottom.

The heater 616 is installed outside the inverted conical container 502 to insulate the inverted conical container 602. Thermometer 618 is installed inside the inverted conical container 602 to measure the internal temperature of the inverted conical container 502. A discharge damper 620 is installed below the inverted conical container 602 to discharge the gelling solution to the melt extruder 110.

The kind of the mineral oil used in the embodiment of the present invention is hydrocarbon-based, medium pressure is 175 ℃, 20 kpa, boiling point is 350 ℃ or more, the color of the mineral oil is natural color. The gelation solution is supplied to the melt extruder 110 when the discharge damper 510 is gelled and opened in the lower portion at 135 to 150 ° C. within 1 to 2 minutes, and the pressure of the conical double shaft ribbon mixer 108 is increased. The transmission allows the process to be fed continuously in batches.

The melt extruder 110 extrudes the gelling solution from the conical ribbon mixer 108 while maintaining a molten state. FIG. 7 is a detailed view illustrating the melt extruder 110 illustrated in FIG. 1. The melt extruder 110 includes a case 702, a recovery tank 704, a heater 706, a screw 708, a motor 710, a gear pump 712.

The case 702 receives the gelling solution supplied from the conical dual axis ribbon mixer 108 through the supply port 705. The interior of the case 702 is maintained at a temperature range of 160-180 ° C., 10-20 ° C., lower than the temperature of a typical polyethylene melting system. The lower end of the case 702 is formed with a hole 705 for discharging a portion of the mineral solution, which is the first solvent contained in the gelling solution, about 15%.

The first solvent discharged from the gelling solution through the hole 703 by extrusion by the melt extruder 110 is stored in the recovery tank 704. That is, about 15% of the gelling solution is recovered by the process of recovering the mineral oil, stored in the recovery tank 704, and transferred to the storage tank 124 for reuse.

The heater 706 is installed outside the case 702 to maintain the gelling solution in a molten state. The screw 708 is installed inside the case 702 and rotates to transfer the gelling solution held in the molten state by the heater 706. The motor 710 is fixedly installed at one end of the screw 708 to transmit rotational force to the screw 708. A gear pump 712 pumps the gelling solution from the screw 708 to the dice 802 of the gel fiber forming part 112 in a manner that maintains a constant pressure.

The gel fiber forming unit 112 spins and cools the melt-extruded gelling solution from the melt extruder 110 to obtain gel fibers. FIG. 8 is an enlarged view illustrating the dice 802 and the cooling tank 804 of FIG. 1. FIG. 9 is a plan view of the dice 802 shown in FIG. 8. The gel fiber forming unit 112 spins the molten extruded gelling solution from the molten extruder 110 through the dice 802 and cools the gelling solution from the dice 802. ). The hole diameter of the die 802 is between 0.7 and 1.6 mm, the L / d ratio is at least 1/25 and 1/40 is most preferred.

The temperature of the extruder extruded to spin the gel solution to spin through the spinneret is preferably maintained at 160 to 180 ℃, and the temperature of the die is preferably maintained at 190 ℃ to 210 ℃.

In addition, the L / D ratio of the die is preferably 25 to 60: 1 so that the gel solution passing through the spinneret of the die can be maintained at an optimum intrinsic viscosity so as to prepare a drawn yarn having excellent strength and elongation. Where L is the length of the spinneret formed in the die and D is the diameter of the spinneret formed in the die.

The gel fiber passing through the spinneret of the die 802 is cooled by the cooling water of the cooling tank 804, wherein the air gap, which is the distance between the front end of the die 802 and the surface of the cooling water, is 2 to 10 mm. It is preferable to blow 1 m / min of air into the air gap. It is more preferable to blow N ₂ gas instead of air to prevent oxidation in the air gap.

The temperature of the cooling water is preferably 0 to 20 ℃, which is intended to improve the workability without lowering the tensile strength of the gel fiber passed through the spinneret of the die.

The solvent extracting unit 114 extracts the first solvent from the gel fiber formed by the gel fiber forming unit 112 by the second solvent and transfers the gel fiber from which the first solvent is separated. FIG. 10 is a detailed perspective view of the solvent extracting unit 114 shown in FIG. 1. The solvent extraction unit 114 includes an extraction tank 1002, a plurality of rollers 1004, 1006, and 1008, a pipe 1010, a recovery tank 1012, and an auxiliary recovery tank 1014. The extraction tank 1002 is comprised by the stainless steel plate of the structure which can be sealed and opened, and contains the 2nd solvent which impregnates the gel fiber formed by the said gel fiber formation part 112. As shown in FIG. More specifically, the first solvent is extracted from the gel fibers by passing the gel fibers through the extraction tank 1002 containing the second solvent, the second solvent is composed of trichlorotrifluoroethane, normal hexane, ethane Any one or two or more selected from the group may be used in combination, and the boiling point is preferably 50 ± 10 ° C. and preferably harmless to the human body.

In this case, a recovery pipe 1015 is formed in communication with the extraction tank so that the first solvent and the second solvent may overflow by the extraction of the first solvent in the extraction tank 1002, and a second portion of the recovery pipe 100 The extraction tank 1002 maintained at a temperature capable of vaporizing the solvent was formed, and the second solvent was supplied to the extraction tank 1002 for reuse, and the first solvent separated from the second solvent was again reused with ultra high molecular weight polyethylene. There is an advantage to reuse for dissolving. In particular, when a hydrocarbon solvent having a boiling point of 350 ° C. or more is used as the first solvent, the second solvent is more easily separated from the second solvent, thereby effectively reusing the first solvent.

The plurality of rollers 1004, 1006, and 1008 are installed at predetermined intervals inside the container, and are impregnated in the second solvent by passing the gel fibers formed in the gel fiber forming unit 112 by a rotation operation. At least five upper rollers 1004, at least three lower rollers 1006, and at least two auxiliary rollers 1008 for extracting the first solvent are included. The pipe 1010 transfers the gel fiber from which the first solvent is extracted to the stretching unit 116 by the plurality of rollers 1004, 1006, and 1008.

The recovery tank 1012 has a volume of about 0.5 m ^3, recovers the first and second solvents extracted from the vessel 1002 through the overflow tube 1013, and vaporizes the condensing coil 1017. The second solvent is supplied to the extraction tank 1002 through the recovery pipe 1015. The heater 1020 is installed outside the recovery tank 1012 to maintain a constant internal temperature of the recovery tank 1012. The auxiliary recovery tank 1014 receives the first solvent from the recovery tank 1012, stores the first solvent, and supplies the first solvent to the recovery tank 102 of the first supply unit 102.

The washing tank 115 washes the gel fibers from which the first solvent is separated from the solvent extracting unit 114.

The stretching unit 116 draws the gel fiber from which the first solvent washed in the washing tank 115 is extracted at a draw ratio of 30 to 50: 1 to obtain ultra high strength polyethylene fiber. The finished ultra high strength polyethylene fiber has a tensile strength of about 30 to 40 g / d and an elongation of 3 to 5%.

FIG. 11 is a detailed perspective view of the stretching unit 116 shown in FIG. 1. The stretching portion 116 includes a plurality of rollers 1102 and a plurality of hot tubs 1104.

A plurality of rollers 1102 are installed to be spaced apart from each other by a predetermined distance to stretch the gel fibers from which the first solvent is extracted. A plurality of hot tubs 1104 are respectively installed at the rear ends of the plurality of rollers 1102 to release hot air to the stretched gel fibers.

On the other hand, in the step of discharging from the die in the liquid state, it is preferable to pull at 5 to 10: 1. This is to improve workability by improving trimming and generating trimming during the stretching process.

The unstretched gel fiber from which the second solvent is extracted is stretched at a predetermined stretch ratio in the stretch step. The drawing step is drawn in a total draw ratio of 30 to 50: 1 in a temperature atmosphere of 120 to 155 ℃, the drawing step may be carried out in one step, but the second step in order to prevent stretching and uniformly stretched at the time of drawing It is preferable to perform above.

Referring again to FIG. 1, the winder 118 winds the ultra high strength polyethylene fiber from the stretchable portion 116 while rotating at a predetermined speed.

As described above, according to the ultrahigh strength polyethylene fiber manufacturing apparatus of the present invention, there is an effect of producing an ultrahigh strength polyethylene fiber having a high strength of 30 g / d or more and a high elongation of 3% or more. These ultra high strength polyethylene fibers can be used in a variety of applications, such as body armor, safety gloves, medical, various ropes, helmets, ski boards.

The first solvent is completely extracted from the gel fibers by using a hydrocarbon solvent having a boiling point of 350 ° C. or higher as the first solvent and using any one of trichlorotrifluoroethane, normal hexane and ethane as the second solvent. In addition, since the separation of the first solvent and the second solvent is easy, the first solvent and the second solvent can be reused, thereby reducing manufacturing costs and preventing environmental pollution.

Claims (17)

A first supply unit for supplying a first solvent metered in the required amount; A second supply unit for supplying ultra-high molecular weight polyethylene measured to have a weight ratio of 5 to 20% by weight relative to 100% by weight of the first solvent; An agitator for stirring the first solvent from the first supply part and the ultra high molecular weight polyethylene from the second supply part while maintaining a predetermined temperature atmosphere to obtain a mixed liquid in the form of a slurry; A conical double shaft ribbon mixer obtained by rotationally mixing the slurry of the slurry form from the stirrer to obtain a gelling solution; A melt extruder for extruding the gelling solution from the conical dual axis ribbon mixer while maintaining a molten state; A gel fiber forming unit for spinning and cooling the molten extruded gelling solution from the molten extruder to obtain gel fibers; A solvent extracting unit for extracting a first solvent from a gel fiber formed by the gel fiber forming unit by a second solvent and transferring the gel fiber from which the first solvent is extracted; And Ultra-high strength polyethylene fiber manufacturing apparatus comprising a stretched portion to obtain the ultra-high strength polyethylene fibers by stretching the gel fibers extracted from the first solvent in a draw ratio of 30 to 50: 1. The method of claim 1, wherein the ultra high molecular weight polyethylene is one of a homopolymer whose repeating unit consists only of ethylene and a copolymer whose repeating unit consists essentially of ethylene and the other monomo is copolymerized in small amounts. Carbon-based solvent, the second solvent is ultra-high strength polyethylene fiber manufacturing apparatus consisting of at least one selected from the group consisting of trichlorotrifluoroethane, normal hexane, ethane. The method of claim 1, wherein the first supply unit A recovery tank for recovering and storing the first solvent separated from the gelling solution by extrusion by the melt extruder; A first pump for pumping the first solvent stored in the recovery tank; A storage tank for storing the first solvent transferred from the first pump through a connecting pipe; A second pump pumping the first solvent stored in the oil storage tank in a predetermined amount unit to measure a weight; And Ultra-high strength polyethylene fiber manufacturing apparatus comprising a first scale hopper for receiving and storing the first solvent of the predetermined amount unit from the second pump. The method of claim 1, wherein the second supply unit A mixer for mixing the ultra high molecular weight polyethylene by moving up and down; A screw conveyor which receives the ultra high molecular weight polyethylene from the mixer while rotating and moves the unit by a predetermined amount; And Ultra-high strength polyethylene fiber manufacturing apparatus comprising a second scale hopper for receiving and storing a certain amount of ultra-high molecular weight polyethylene from the screw conveyor. The apparatus of claim 4, wherein the screw conveyor is controlled to stop when the weight of the ultra high molecular weight polyethylene reaches a weight set in the second scale hopper through the mixer. 5. The mixer of claim 4 wherein the mixer A container for storing the ultra high molecular weight polyethylene introduced through the raw material inlet formed in the upper portion; A rotating shaft rotatably installed horizontally from side to side at the center of the container; A motor connected to one end of the rotating shaft to transmit a rotating force to the rotating shaft; Inner and outer ribbons disposed around the rotary shaft to rotate simultaneously with the rotation of the rotary shaft to move and mix the ultra-high molecular weight polyethylene raw material contained in the container in opposite directions; And Ultra high strength polyethylene fiber manufacturing apparatus comprising a discharge damper for discharging the ultra-high molecular weight polyethylene mixed in the container. The method of claim 6, wherein the pitch of the inner and outer ribbons are equal to each other, the diameter of the inner ribbon is 1/2 of the diameter of the outer ribbon, the spacing between each of the inner and outer ribbons and the container 1 ~ Ultra high strength polyethylene fiber manufacturing apparatus having a gap of 3 mm. The method of claim 4, wherein the screw conveyor is A cylindrical case receiving the mixed ultra high molecular weight polyethylene supplied from the mixer through a supply hole formed at an upper portion thereof; A screw installed in the case to move the ultra high molecular weight polyethylene while rotating; A motor installed at one end of the screw to drive the screw; And Ultra high-strength polyethylene fiber manufacturing apparatus comprising a discharge damper for discharging the ultra-high molecular weight polyethylene moved by the screw in a predetermined amount unit. 5. The apparatus of claim 4, wherein the second scale hopper further comprises: a container for storing the ultra high molecular weight polyethylene transferred from the screw conveyor through an inlet formed at an upper portion thereof; A load cell supporting the container; And a discharge damper installed under the container to discharge the ultra high molecular weight polyethylene stored in the container in a predetermined amount. The method of claim 1, wherein the stirrer A container having left and right inlets through which the ultra high molecular weight polyethylene and the first solvent are introduced; A rotating shaft installed across the container from the center up and down; A motor connected to an upper end of the rotating shaft; Stirring vanes fixedly installed at the front and center of the rotary shaft to obtain a slurry by stirring the ultrahigh molecular weight polyethylene and the first solvent; A discharge damper installed at a lower end of the container to discharge the slurry; A heater installed on an outer wall of the vessel to maintain a required process temperature from the outside, and heating the inside of the vessel; And Ultra high strength polyethylene fiber manufacturing apparatus is installed inside the container including a temperature sensor for sensing the temperature inside the container. 2. The conical dual shaft ribbon mixer of claim 1, wherein An inverted conical container for storing the mixed liquid in the form of the slurry introduced from the stirrer through a supply port; A first rotating shaft installed obliquely up and down on one side of the inverted conical container; A motor connected to one end of the first rotation shaft to transmit rotational force to the first rotation shaft; A driving bevel gear fixed to an upper end of the first rotation shaft; A driven bevel gear that rotates in engagement with the drive bevel gear; A second rotating shaft extending from the driven bevel gear into the container; A pair of ribbons connected to the first and second rotation shafts to rotate simultaneously with the rotation of the first and second rotation shafts so that the mixed liquid contained in the inverted conical container flows left and right and mixed; A heater installed outside the inverted conical container to insulate the inverted conical container; A thermometer installed inside the inverted conical container and measuring an internal temperature of the inverted conical container; And And a discharge damper installed at a lower portion of the container and discharging the gelling solution to a melt extruder. The method of claim 1, wherein the melt extruder A case accommodating the gelling solution from the mixer and having a hole formed at one lower end thereof for discharging a portion of the first solvent contained in the gelling solution to the first supply unit; A heater installed outside the case to maintain the gelling solution in a molten state; A screw installed inside the case and rotating to transfer the gelling solution maintained in the molten state to the heater; A motor fixed to one end of the screw to transmit rotational force to the screw; Ultra high strength polyethylene fiber manufacturing apparatus comprising a gear pump for pumping the gelling solution from the screw to a gel fiber forming portion. The ultrahigh strength polyethylene according to claim 1, wherein the gel fiber forming unit comprises a cooling bath for spinning the melt extruded gelling solution from the melt extruder through a die and cooling the gelling solution from the die with cooling water. Textile manufacturing equipment. The apparatus of claim 13, wherein an air gap, which is an interval between the tip of the die and the surface of the cooling water, is 2 to 10 mm, and 1 m / min of air is blown into the air gap. The method of claim 1, wherein the solvent extraction unit An extraction tank containing a second solvent for impregnating the gel fibers formed by the gel fiber forming portion; A plurality of rollers installed at predetermined intervals inside the extraction tank to pass the gel fibers formed in the gel fiber forming unit by a rotation operation to extract the first solvent impregnated in the second solvent; A pipe for transporting the gel fibers from which the first solvent has been extracted by the plurality of rollers; A recovery tank for recovering the first and second solvents extracted from the extraction tank through an overflow pipe and supplying the second solvent to the extraction tank through a recovery pipe; And Ultra high strength polyethylene fiber manufacturing apparatus comprising a secondary recovery tank for receiving and storing the first solvent supplied from the recovery tank and supplied to the first supply. The method of claim 1, wherein the stretching portion A plurality of rollers spaced apart from each other by a predetermined distance to compress and stretch the gel fibers from which the first solvent is extracted; And Ultra high strength polyethylene fiber manufacturing apparatus comprising a plurality of hot tubs respectively installed at the rear end of the plurality of rollers to discharge hot air to the stretched gel fibers. 17. The apparatus of claim 16, further comprising a winder for winding the ultra high strength polyethylene fiber from the stretching portion.

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