KR100981727B1 - Monofilament thread and manufacturing method of it - Google Patents

Abstract

PURPOSE: A manufacturing method of a monofilament yarn, and the monofilament yarn manufactured thereby are provided to prevent the yarn from twisting and tangling by transferring plural wires in parallel. CONSTITUTION: A manufacturing method of a monofilament yarn comprises the following steps: successively extruding a synthetic resin heated to 200~350 deg C through a spinning nozzle with plural holes using an extruder(S10); cooling extruded wires with cooling water in 5~50 deg C(S20); drawing the cooled wires using multiple transporter and heat-setting the wires using a setting device(S30); spraying a surface treatment agent(S30a); and transferring the wires to a winder(S40).

Description

Manufacture method of monofilament yarn and its monofilament yarn {MONOFILAMENT THREAD AND MANUFACTURING METHOD OF IT}

The present invention relates to a method for manufacturing a monofilament yarn and a yarn thereof, and more particularly, to a method for producing a monofilament yarn, which can easily produce a monofilament yarn that increases strength and elongation without twisting or twisting. It's about the yarn.

Generally, monofilament yarns are used for filters, fishing nets, velcro, artificial turf, bristles, and the like, and polypropylene mono yarns, nylon mono yarns, and polyester mono yarns.

The polypropylene mono yarn is not only strong in water resistance, but also excellent in impact resistance and electrical properties, and is used in industrial filters, ropes, brushes, fishing nets, and the like. The nylon mono yarn has high tensile strength as well as excellent wear resistance and thus self-lubricating property. It is used in Velcro, fishing nets, ropes, stockings, bristles, and the like. The polyester mono yarn has not only strong tensile strength but also excellent heat resistance and chemical resistance, and is used in zippers, wire coverings, seat belts, conveyor belts, and the like.

Such monofilament yarns are generally manufactured in a circular cross section as an example, and may be conveniently used as fishing lines. However, the monofilament yarns have difficulty controlling the density of the fabric when being woven into the fabric, and have a surface when used as bristles. There is a limit to increase the improvement of brushing smooth, there is a disadvantage in that it was difficult to reduce the weight, so there was a limit to reduce the weight of the mesh.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is a method for producing a monofilament yarn that can be easily produced without twisting or twisting monofilament yarns having a straight or cross-shaped cross section And its monofilament yarns.

Another object of the present invention is to provide a method for manufacturing a monofilament yarn, which can easily manufacture a monofilament yarn having increased strength and elongation.

In addition, the present invention by cooling with a cooling water occurs the temperature difference between the upper and lower polypropylene (Polypropylene: PP), polyethylene terephthalate (PET), polyamide nylon-6 (Polyamide Nylon-6), Manufacture of monofilament yarns that can be elastically cooled and set according to synthetic resins such as polyamide nylon-66, polybuthylene terephthalate (PBT) and polyethylene (PE) To provide a way.

In order to achieve the above object, the present invention is a synthetic resin heated to 200 ℃ ~ 350 ℃ by an extruder in the manufacture of a monofilament yarn is formed in the cross-section having a plurality of round acute vertices by melting and extruding the synthetic resin An extrusion molding step of continuously extruding the spinneret having a plurality of rounded acute angle vertices formed therein; A cooling step of cooling the plurality of strands of the wire rod extruded in the extrusion molding step by passing through 5 ° C. to 50 ° C. cooling water; A setting and stretching step of extending and transferring the wire rods passing through the cooling water in the cooling step side by side with a plurality of conveyors, and setting and arranging them with a setting unit disposed at an outlet side of the plurality of conveyors, respectively; A surface treatment step of applying a liquid surface treatment agent in which any one or more of an antistatic agent, wax, silicon, and a sunscreen agent are mixed with water at the inlet side of the setting device of the setting and stretching step; It provides a method for producing a monofilament yarn comprising a; final transfer step of the final transfer of the wire rod passing the setting and stretching step to the winder.

In addition, the present invention is the cooling water of the cooling step is contained in a cooling water tank having a cooling heat exchanger at the bottom temperature of the lower portion of the cooling water is 5 ℃ ~ 30 ℃ and the temperature of the upper portion of the cooling water is distributed to 40 ℃ ~ 50 ℃, the cooling water The lower portion of the guide member is installed in the center of the tank is characterized in that for pressing the wire passing through the cooling water.

The cross section of the wire rod is a straight or cross-shaped, characterized in that the diameter of the wire rod is 0.1mm ~ 1.5mm.

The synthetic resin added to the extruder of the extrusion step is polypropylene (PP) and polyethylene terephthalate (PET), polyamide nylon-6, and polyamide nylon 66. Polybutyrene terephthalate (Polybuthylene terephthalate: PBT), characterized in that any one of polyethylene (Polyethylene: PE).

It provides a monofilament yarn prepared by the same method as described above.

The method for producing a monofilament yarn according to the present invention as described above is not only formed in a straight or cross-shaped cross section of the wire discharged from the spinning nozzle, but also transfers a plurality of wires side by side, without twisting or twisting the monofilament yarn. Not only can it be easily manufactured, there is an advantage in that a monofilament yarn having increased strength and elongation can be easily manufactured.

In addition, since there is a difference in temperature between the upper and lower parts of the cooling water cooling the wire discharged from the spinning nozzle, polypropylene (PP), polyethylene terephthalate (PET), polyamide nylon 6 (Polyamide) having various crystallization properties Nylon-6), Polyamide Nylon-66, Polybuthyleneterephthalate (PBT), Polyethylene (PE), etc. There is this.

In addition, the surface of the final product monofilament yarns are treated with a surface treatment agent by applying a liquid surface treatment agent mixed with water at least one of an antistatic agent, wax, silicone, sunscreen agent at the inlet side of the setting device of the setting and stretching step. In addition, the antistatic function of the yarn is improved to prevent the generation of static electricity, and the ultraviolet ray blocking function of the yarn is improved to protect the yarn from ultraviolet rays, so that the life of the yarn can be easily extended.

Furthermore, since the monofilament yarns produced by the manufacturing method of the present invention are formed in a straight or cross-shaped cross section, there is an advantage that the strength and elongation are easily improved while being light.

1 is a process chart showing a method for producing a monofilament yarn according to the present invention.
Figure 2 is a process chart showing an embodiment of a method for producing a monofilament yarn according to the present invention.
Figure 3 is an electron micrograph showing a monofilament yarn produced by the manufacturing method according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view showing a method of manufacturing a monofilament yarn according to the present invention, the manufacturing method of the present invention is to produce a monofilament yarn formed in a cross section having a plurality of round acute vertices by melting and extruding a synthetic resin, Extrusion molding step (S10) for extruding synthetic resin, cooling step (S20) for cooling a plurality of wire rods discharged in the extrusion molding step (S10), heat setting and stretching the wire rod cooled in the cooling step (S20) Monofilament as the final product of the wire rod set in the setting and stretching step (S30), the surface treatment step (S30a), the setting and stretching step (S30) to apply a surface treatment agent in the process of the setting and stretching step (S30) Final transfer step (S40) for the final transfer of the yarn to the winder.

Here, the extrusion molding step (S10) uses a device in which a spinning nozzle is disposed at the front end of the extruder for heating and extruding the synthetic resin, and continuously discharged the synthetic resin heated to 200 ~ 350 ℃ to the spinning nozzle while being transported by the extruder To form a wire rod.

The spinneret is formed of an array of straight or cross-shaped holes to extrude a plurality of high-temperature wire rods.

In the cooling step (S20) to cool the high-temperature wire rod that is extruded in the extrusion molding step (S10), the wire rod is cooled by passing through 5 ℃ ~ 50 ℃ cooling water.

In other words, while the high temperature wire is transferred in the setting and stretching step (S30) to be described later to maintain the state immersed in the coolant.

In particular, the present embodiment uses a synthetic resin of various properties, the synthetic resin introduced into the extruder of the extrusion molding step (S10) polypropylene (Polypropylene: PP) and polyethylene terephthalate (Polyethylenetrephthalate: PET), polyamide nylon 6 (Polyamide Nylon-6), polyamide nylon 66 (Polyamide Nylon-66), polybutyrene terephthalate (PBT), polyethylene (PE).

Therefore, in the cooling step (S20), the guide member for placing the coolant in the coolant tank having a cooling heat exchanger in the lower part and guiding the wire rod to be submerged in the coolant is disposed in the coolant tank to cool the wire with the coolant in the coolant tank. The lower part of the cooling water in the cooling water tank is smoothly cooled by the cooling heat exchanger so that the upper part of the cooling water becomes a relatively high temperature.

Particularly, in the present invention, the temperature of the lower part of the cooling water is maintained at 5 ° C. to 30 ° C., the temperature of the upper part of the cooling water is distributed to 40 ° C. to 50 ° C., and the lower side of the guide member installed at the center of the cooling water tank has the cooling water. The wire rod is passed through.

Then, the hot wire discharged from the spinning nozzle is quenched at a relatively high temperature, and when the wire rod immersed from the upper side of the cooling water is transferred to the lower side of the cooling water, the immersed wire rod is gradually cooled at the lower temperature of the lower side of the cooling water. It is possible to flexibly respond to synthetic resins having various crystallization properties.

Of course, the cooling heat exchanger may be an evaporator in which the refrigerant circulated in the refrigerating cycle is evaporated and endothermic, and may cool the lower portion of the cooling water in the cooling water tank by circulating the chiller, the circulating cooling water cooled by the freezer, to the cooling heat exchanger. .

Meanwhile, in the setting and stretching step (S30), the wire rods passing through the cooling water of the cooling step (S20) are stretched while being transported side by side to the plurality of feeders, and opened as a setting unit disposed on the outlet side of the plurality of feeders, respectively. Decided.

Thus, in the present embodiment, as shown in Figure 2, the setting and stretching step (S30) is the first transfer step (S31), the first setting step (S32), the second transfer step (S33), the second setting step (S34), the third transfer step (S35), the third setting step (S36) proceeds in sequence.

In other words, the first transfer step S31 is to transfer the wire rod to the first transfer machine, and the first setting step S32 is to open and fix the wire rod with hot water at high temperature with the first setter or to open and fix the wire rod with dry or wet hot air. The second transfer step (S33) is to transfer the wire rod to the second transfer machine, the second setting step (S34) is to open and set the wire rod with hot air with the second setter, the third transfer step (S35) is the third The wire rod is transferred to the feeder, and the third setting step S36 is to heat-set the wire rod with hot air using the third setting unit.

Accordingly, in the setting and stretching step S30, the first setter is disposed on the outlet side of the first transfer machine for transferring the wire rod passing through the cooling step S20, and the second transfer unit is placed on the outlet side of the first setter. Machine, a second setter, a third conveyer, and a third setter are disposed in this order to transfer the wire to the first conveyer, the second conveyer, and the third conveyer at a speed of 35 m / min to 350 m / min, The wire rod is stretched according to the speed difference between the 1st feeder, the 2nd feeder and the 3rd feeder.

In the first setting device, the wire rod may be heat-set by passing the hot wire at 80 ° C. to 90 ° C. high temperature hot water, or may be heat-set for 1.1 seconds to 9.8 seconds by dry or wet hot air. Heat is fixed at 350 ℃ hot air for 1.1 seconds to 9.8 seconds.

In particular, the wire feed rate of the second feeder is preferably 220% to 800% of the wire feed rate of the first feeder, so that the wire feed rate of the second feeder is The wire rod is stretched by 120% ~ 700% higher than the wire feed speed.

The wire feed rate of the third feeder is preferably 130% to 145% of the wire feed rate of the second feeder. Accordingly, the wire feed rate of the third feeder is equal to that of the second feeder. The wire rod is stretched as much as it increases by 30% ~ 45% faster than the wire feed rate.

Furthermore, the hot water or hot air temperature of the first setter is 80 ° C to 90 ° C, the hot air temperature of the second setter is 80 ° C to 350 ° C, and the hot wind temperature of the third setter is 100 ° C to 350 ° C.

The heat setting temperature and the elongation of the wire rod in the setting and stretching stages set in the first, second, and third setters as described above are optimal conditions in consideration of materials, stretching uniformity, and the like. It may be said that it is very preferable to heat-set the wire rod by changing the setting temperature and time of the third setter.

For example, the hot air temperature may be matched to the feeding speed of the wire rod. When transferring the wire rod to 35 m / min, the hot air temperature of the first, second and third setting machines is lowered to 80 ° C. to 120 ° C., and the wire rod is 350 m / min. When conveying, it is preferable to raise the hot air temperature of 1st, 2nd, 3rd setting machine to 100 to 350 degreeC.

Of course, the first, second, and third transfer machine and the final transfer machine to be described later are not shown, but after placing a plurality of rollers in two rows up and down, the wire rod is transferred to the jig jack up and down, and the surface of the wire It is preferable to form a plurality of grooves corresponding to the cross section in accordance with the number of strands of the wire rod discharged from the spinning nozzle to eliminate the occurrence of kinks and twists when the wire rod is transferred.

In addition, the first setter is equipped with a heater for heating the built-in hot water to pass the wire to the inside of the hot water to open and set the wire to the temperature of the hot water, the first setter can adopt the hot air method like the second and third setters have.

In other words, although the first, second and third setters of the hot air type are not shown, a heater is installed at the outlet of the blower and hot air discharged from the blower is allowed to flow into the inner space of the main body of the first, second and third setters. It is preferable to, and may be formed in a structure circulating between the blower and the main body.

Meanwhile, the surface treatment step (S30a) includes a surface treatment step (S30a) of applying a surface treatment agent to the surface of the wire rod during the setting and stretching step (S30), the surface treatment step (S30a) of the setting and stretching step (S30) At the inlet side of the setting machine, a surface treating agent of a liquid mixed with water or one of an antistatic agent, a wax, a silicone and a sunscreen agent is applied to treat the surface of the monofilament yarn as a final product with the surface treating agent.

The surface treatment step (S30a) is the inlet of the first setter, the second setter, the third setter so as to proceed in the first coating step (S30aa), the second coating step (S30ab), the third coating step (S30ac) Each of the rollers for applying the surface treatment agent is disposed on the side. In the first application step S30aa, the surface treatment agent is applied to the wire rod before the first setting step S32, and the second application step S30ab. In the present invention, the surface treatment agent is applied to the wire rod before the second setting step S34. In the third coating step S30ac, the surface treatment agent is applied to the wire rod before the third setting step S36.

Of course, a part of the surface treatment agent coating roller is immersed in the liquid surface treatment agent and the coating roller is rotated in accordance with the movement of the wire rod so that the surface treatment agent is buried on the surface of the coating roller to apply the surface treatment agent to the wire rod.

Thus, in the first coating step (S30aa), the surface treatment agent is first applied to the surface of the wire rod, and in the first setting step (S32), while drying the surface treatment agent on the wire rod and heat-setting the wire rod with hot air, and the second coating step (S30ab). ) And the surface treatment agent is applied to the surface of the wire in the secondary, heat-setting the wire with hot air while drying the surface treatment agent on the wire in the second setting step (S34), the surface on the surface of the wire in the third coating step (S30ac) The treatment agent is applied third, and the wire is heat-set with hot air while drying the surface treatment agent buried in the wire in the third setting step S36.

Of course, it is apparent that the composition of the surface treatment agent can be adjusted according to the material of the wire rod in three application processes.

On the other hand, the final transfer step (S40) is the final transfer of the monofilament yarn of the wire rod, that is, the final product passed through the setting and stretching step (S30) to the winder.

In particular, the wire rod having passed the setting and stretching step (S30) is transferred to the final transfer machine in the final transfer step (S40), the wire transfer speed of the final transfer machine is 93% of the wire transfer speed of the third transfer machine To 99%.

Then, in the third setting step S36, the shrinkage stability of the monofilament yarn of the final product is improved by opening and closing the wire rod.

The cross-section of the monofilament yarn of the wire rod manufactured as described above is cross-sectional, although not shown, and may be formed with a diameter of 0.1 mm to 1.5 mm, and the cross section of the monofilament yarn of the wire rod is shown in FIG. 3 enlarged by an electron microscope. As a cross-shaped, it may be formed in a 0.1mm ~ 1.5mm diameter.

In the present invention, polypropylene (PP), polyethylene terephthalate (PET), polybutyrene terephthalate (PBT), polyamide nylon-6 (Polyamide Nylon-6), polyamide nylon 66 ( Polyamide Nylon-66), polyethylene (PE), etc. as a raw material to form a monofilament yarn of straight or cross-shaped cross section to be transferred side by side with a plurality of feeders to prevent twisting or twisting during winding.

For example, when used in fishing nets, velcro, etc., since the monofilament yarn produced by the present invention has excellent strength and elongation, it can be conveniently manufactured with a light and durable fishing net, and has a cross-shaped cross section. Since the adhesive force can be excellent and the width | variety of the monofilament yarn of this invention which has a straight cross section is constant, it is a shading film and rice bag.

S10: extrusion molding step
S20: cooling stage
S30: setting and drawing step
S31, S33, S35: first, second, third transfer step
S32, S34, S36: first, second, third setting step
S30a: surface treatment step
S30aa, S30ab, S30ac: first, second, third application steps
S40: final transfer step

Claims (7)

In manufacturing a monofilament yarn formed by melting and extruding a synthetic resin into a cross section having a plurality of round acute vertices,
An extrusion molding step of continuously extruding the synthetic resin heated to 200 ° C. to 350 ° C. by an extruder with a spinning nozzle having a plurality of rounded acute vertices; A cooling step of cooling the plurality of strands of the wire rod extruded in the extrusion molding step by passing through 5 ° C. to 50 ° C. cooling water; A setting and stretching step of extending and transferring the wire rods passing through the cooling water in the cooling step side by side with a plurality of conveyors, and setting and arranging them with a setting unit disposed at an outlet side of the plurality of conveyors, respectively; A surface treatment step of applying a liquid surface treatment agent in which any one or more of an antistatic agent, wax, silicon, and a sunscreen agent are mixed with water at the inlet side of the setting device of the setting and stretching step; Final transfer step of the final transfer of the wire rod passing the setting and stretching step to the winder; It is made, including
In the setting and stretching step, a first setter is disposed on the outlet side of the first feeder that transfers the wire rod that has passed the cooling step, and a second feeder, a second setter, and a third setter are placed on the outlet side of the first setter. A first feeder, a second feeder, and a first feeder, a third setter are disposed in this order, and the wire rod is transported at a speed of 35 m / min to 350 m / min to the first feeder, the second feeder, and the third feeder. The wire rod is stretched according to the speed difference of the three feeders, and the wire rod passing through the first setter, the second setter, and the third setter is heat-set at 1.1 to 9.8 seconds at 80 ° C to 350 ° C. The wire feed rate is 220% to 800% of the wire feed rate of the first feeder, the wire feed rate of the third feeder is 130% to 145% of the wire feed rate of the second feeder. Hot water or hot air temperature of the first setter is 80 ℃ ~ 90 ℃, hot air temperature of the second setter is 80 ℃ ~ 350 ℃, the third set The hot air temperature and the group 100 ℃ ~ 350 ℃,
In the surface treatment step, a surface treatment agent is applied to the first setter, the second setter, and the third setter by placing a surface treating agent applying roller on the inlet side of the first setter, the second setter, and the third setter. Method for producing a monofilament yarn, characterized in that the coating. The method of claim 1,
The cooling water of the cooling step is contained in a cooling water tank having a cooling heat exchanger at the bottom thereof so that the temperature of the lower part of the cooling water is 5 ° C. to 30 ° C., and the temperature of the upper part of the cooling water is distributed to 40 ° C. to 50 ° C., and the central part of the cooling water tank A method of manufacturing a monofilament yarn, characterized in that the lower portion of the guide member is installed to press the wire rod passing through the cooling water. delete The method of claim 1,
The wire rod having passed the setting and stretching step is transferred to the final transfer machine in the final transfer step, wherein the wire transfer speed of the final transfer machine is 93% to 99% of the wire transfer speed of the third transfer machine. Method of making monofilament yarns. The method of claim 1,
The wire conveyed in the final transfer step is a method of manufacturing a monofilament yarn, characterized in that formed in the cross-section of the straight or cross-shaped having a diameter of 0.1mm ~ 1.5mm. The method of claim 1,
The synthetic resin added to the extruder of the extrusion step is polypropylene (PP) and polyethylene terephthalate (PET), polyamide nylon-6, and polyamide nylon 66. Polybutyrene terephthalate (Polybuthylene terephthalate: PBT), Polyethylene (Polyethylene: PE), characterized in that any one of the method of producing a monofilament yarn. The monofilament yarns produced by any one of claims 1, 2, 4, 5, and 6.

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