WO2023075034A1

WO2023075034A1 - Resin-coated yarn, and system and method for manufacturing same

Info

Publication number: WO2023075034A1
Application number: PCT/KR2022/001501
Authority: WO
Inventors: 장지상; 이재정; 최경석; 박치균; 조혜원
Original assignee: (주)아셈스
Priority date: 2021-10-27
Filing date: 2022-01-27
Publication date: 2023-05-04

Abstract

The present invention relates to a resin-coated yarn, and a system and method for manufacturing same, wherein a hot-melt resin is coated on a yarn with inorganic powders and thus the yarn has increased initial elastic modulus (Young's Modulus) and improved sphericity and centrality. The resin-coated yarn manufacturing system according to the present invention comprises: a core yarn supply unit to which a core yarn reel having a core yarn to be coated wounded therearound is mounted; a resin coating unit which includes a coating nozzle through which the core yarn released and transported from the core yarn supply unit passes and is configured to coat and extrude a resin mixture on the surface of the core yarn by supplying the resin mixture to the coating nozzle, the resin mixture being obtained by mixing inorganic particles with a molten hot-melt resin; a primary cooling unit for performing primary cooling by spraying cooling water mist and cooling air to the core yarn (hereinafter referred to as a "coated yarn") coated with the resin mixture transported through the resin coating unit; a secondary cooling unit for performing secondary cooling by passing the coated yarn having passed through the primary cooling unit through cooling water stored in a water storage tank; and a coated yarn recovery unit having an unloader shaft to which a recovery reel is rotatably mounted such that the coated yarn having passed through the secondary cooling unit is wound around same.

Description

Resin coating yarn and its manufacturing system and manufacturing method

The present invention relates to a coated yarn in which a resin is coated on the surface of yarn, and to a manufacturing apparatus and method thereof, and more particularly, to a yarn having a hot melt resin made of thermoplastic polyurethane (TPU) resin or the like on the surface together with inorganic powder. It relates to a resin-coated thread with increased Young's Modulus and improved sphericity and centrality by coating on a manufacturing system and manufacturing method thereof.

In general, hot-melt coated yarn is a yarn that implements various functions (eg, imparting adhesion and improving abrasion resistance, etc.) by coating the outer surface of the fiber yarn with a hot-melt resin.

Specifically, Korean Patent Registration No. 10-1249975 discloses a hot melt coating step of coating yarn with a hot melt composition, a cooling step of cooling the hot melt coated yarn produced through the hot melt coating step, and a hot melt coated yarn that has undergone the cooling step. It consists of a winding step of winding, a weaving step of weaving the hot melt coated yarn that has passed through the winding step, and a heat bonding step of fixing the woven fibers by heating the woven material manufactured through the weaving step. The hot melt composition 100 parts by weight of thermoplastic polyurethane, 50 to 75 parts by weight of wax, 20 to 40 parts by weight of paraffin, 5 to 30 parts by weight of calcium carbonate and 10 to 35 parts by weight of dimer acid A method for producing a coated yarn is disclosed.

And Korean Registered Patent Publication No. 10-1341054 discloses a method for producing coated yarn, comprising the steps of mixing thermoplastic polyurethane and a thickener, melting and kneading them, drying and aging them again to prepare a compound, After melting the compound, a method for producing a coated yarn comprising the step of coating the molten compound on the surface of any one yarn selected from polyester, nylon, and spandex is disclosed.

As described above, in the process of manufacturing coated yarn by coating the surface of the yarn with the resin, the surface of the yarn is coated with the resin, transported at a predetermined speed, and rapidly cooled by passing through a water storage tank in which cooling water is stored, and then put on a reel. wind up

However, when the thermoplastic polyurethane (TPU) resin is quenched at a high temperature, a lot of shrinkage occurs, resulting in an uneven surface.

In addition, the high resistance between the molten TPU resin and the water surface of the coating yarn moving at high speed causes the TPU surface to be non-uniform, and thus the sphericity and centrality are reduced.

The present invention is to solve the above conventional problems, an object of the present invention is a resin coating that increases the initial modulus of elasticity (Young's Modulus) by coating a hot melt resin with inorganic powder on yarn, and improves sphericity and centrality. is to provide a

Another object of the present invention is to prevent damage or deformation of the resin coated on the surface of the yarn in the process of conveying the yarn at high speed during the manufacturing process, so that the surface is uniform and the resin-coated yarn can improve sphericity and centrality. It is to provide a manufacturing system and a manufacturing method using the same.

The resin coated yarn according to the present invention for achieving the above object is characterized in that it is prepared by coating a resin mixture in which inorganic particles are mixed with a hot melt resin heated to a certain temperature and then melted on the surface of the yarn and then cooled.

The inorganic particle is one selected from the group consisting of SiO ₂ , CaCO ₃ , CaSO ₄ , TiO ₂ , ZnO, ZrO ₂ , Al ₂ (SO ₄ ) ₃ , WS ₂ , graphene oxide, and UV Shielding nanopowder Above, it has a size of 50 nm to 50 μm, and may be mixed in an amount of 1.5 to 2.0 parts by weight based on 100 parts by weight of the hot melt resin.

The coating yarn of the present invention is first cooled by cooling water mist and cooling air while being transported at a predetermined speed after the resin mixture is coated on the surface of the yarn, and then secondarily cooled while passing through a reservoir in which the cooling water is stored. can be produced through

At this time, the yarn may be cooled while moving zigzag through the primary cooling chamber in which cooling water mist and cooling air are sprayed.

The resin-coated yarn preferably has a sphericity of 75% or more and a centrality of 1.2 or more.

A manufacturing system according to one embodiment of the present invention for producing the resin-coated yarn of the present invention having the above characteristics is to manufacture a resin-coated yarn in which a resin mixture in which inorganic particles are mixed with a hot melt resin is coated on the surface of the yarn. As a manufacturing system, a yarn supply unit to which a yarn reel (reel) on which the yarn to be coated is wound is mounted; A resin coating unit including a coating nozzle through which the yarn released and transported from the yarn supply unit passes, and extruding while coating the resin mixture on the surface of the yarn by supplying a resin mixture in which inorganic particles are mixed with molten hot melt resin to the coating nozzle ; a primary cooling unit for primary cooling by spraying cooling water mist and cooling air to yarns coated with a resin mixture (hereinafter referred to as 'coated yarns') transported through the resin coating unit; A secondary cooling unit for secondary cooling by passing the cooling water stored in the water storage tank through the coated yarn passing through the primary cooling unit; and a coated yarn recovery unit having an unloader shaft to which a recovery reel for winding the coated yarn passing through the secondary cooling unit is rotatably mounted.

According to another aspect of the manufacturing system of the present invention, the primary cooling unit includes a primary cooling chamber through which the coating yarn passes, a plurality of mist nozzles installed on the upper side of the primary cooling chamber and spraying cooling water mist downward, , and an air nozzle for injecting cooling air into the primary cooling chamber.

According to another aspect of the manufacturing system of the present invention, the primary cooling unit is installed on both sides of the primary cooling chamber so that the coating yarn moves in a zigzag shape in the primary cooling chamber, so that the coating yarn passes while being wound. A plurality of guide members may be further included.

The plurality of mist nozzles may be arranged at regular intervals on both sides of the moving path of the coating yarn to spray cooling water mist toward the coating yarn.

Here, it is preferable that the plurality of mist nozzles are installed inclined at a predetermined angle with respect to an axis perpendicular to the ground to spray cooling water mist toward the coating yarn.

The air nozzle may be disposed between the mist nozzles to inject cooling air downward.

The resin-coated yarn manufacturing system according to the present invention, as long as the housing disposed between the secondary cooling unit and the coated yarn recovery unit, and the coated yarn disposed vertically inside the housing and passing through the secondary cooling unit pass through while being wound. A drying unit including a pair of dehydration rollers and an air spray unit for spraying compressed air to the inside of the housing to dry the coated yarn may be further included.

A guide groove guided while the coating yarn is inserted may be spirally formed on an outer surface of the dewatering roller along a circumferential direction.

The method for manufacturing resin-coated yarn according to the present invention using the manufacturing system as described above may include the following steps.

(S1) feeding the yarn at a constant speed;

(S2) heating and melting the hot melt resin and passing the yarn through an extruder supplied with a resin mixture made by mixing inorganic particles with the melted hot melt resin to coat the surface of the yarn with the resin mixture to form a coated yarn;

(S3) primary cooling while passing the coating coated with the resin mixture through a primary cooling chamber in which cooling water mist and cooling air are sprayed;

(S4) secondary cooling while passing the coated yarn passing through the primary cooling chamber through a reservoir in which cooling water is stored; and,

(S5) winding and recovering the coated yarn passing through the reservoir.

When the coating yarn passes through the primary cooling chamber, it is preferable that the coating yarn is cooled while moving zigzag inside the primary cooling chamber.

According to the present invention, since inorganic particles are mixed with the hot melt resin and coated on the surface of the yarn, the initial modulus of elasticity of the coated yarn is increased. A resin mixture deformed by resistance can be restored to its original shape. Therefore, the sphericity of the coated yarn can be improved to 75% or more and the centrality to 1.2 or more.

In addition, since the coated yarn of the present invention is manufactured by being cooled through a primary cooling process using cooling water mist and cooling air and a secondary cooling process using cooling water in a water tank, surface unevenness due to rapid cooling of the resin mixture can be prevented. And, the sphericity and centrality can be further improved.

The manufacturing system for manufacturing the resin-coated yarn of the present invention is manufactured by cooling the resin-coated yarn through the primary cooling process by cooling water mist and cooling air, and the secondary cooling process by the cooling water of the water tank. In the manufacturing process, it is possible to prevent surface unevenness due to rapid cooling of the resin mixture and to prevent deformation of the resin mixture coating layer due to resistance of the cooling water in the reservoir, thereby providing an advantage of further improving sphericity and centrality.

1 is a cross-sectional view of a resin-coated yarn according to an embodiment of the present invention.

Figure 2 is a configuration diagram showing the configuration of an embodiment of a manufacturing system for manufacturing a resin-coated yarn of the present invention.

3 is a cross-sectional view showing some configurations of the resin-coated yarn manufacturing system shown in FIG. 2;

FIG. 4 is a front cross-sectional view of a primary cooling unit constituting the resin-coated yarn manufacturing system shown in FIG. 2;

FIG. 5 is a cross-sectional view of a modified example of a primary cooling unit constituting the resin-coated yarn manufacturing system shown in FIG. 4, viewed from the side.

6 is a cross-sectional view showing another embodiment of a primary cooling unit constituting the resin-coated yarn manufacturing system shown in FIG. 2;

7 is a graph schematically showing changes in the initial modulus of elasticity depending on whether a hot melt resin and inorganic particles are mixed.

Figure 8 is a graph showing a comparison of the temperature change of the coating yarn by the conventional coating yarn cooling method and the coating yarn cooling method of the present invention.

9 is a graph showing the measurement results of tensile strength according to the mixing amount when ZnO is mixed as an inorganic particle in a hot melt resin.

10 is a graph showing the measurement results of tensile strength according to the blending amount when TiO ₂ as inorganic particles was mixed with a hot melt resin.

With reference to the accompanying drawings, a resin-coated yarn according to embodiments of the present invention and its manufacturing system and manufacturing method will be described in detail. Since the present invention can have various changes and various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure.

In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Referring to FIG. 1, the resin coated yarn 10 according to the present invention is a resin mixture 12 in which inorganic particles 14 are mixed with a hot melt resin 13 on the surface of a yarn 11 constituting a core fiber. ) is coated with a predetermined thickness (for example, 30 to 500 μm thick), and in the manufacturing process, while transferring the yarn at a constant speed, it is heated to a certain temperature and passed through a resin mixture in which inorganic particles are mixed with a melted hot melt resin. It is manufactured by coating the surface of yarn and then cooling it.

The yarn 11 may be used alone or in combination of two or more among polyester yarn, nylon yarn, or cotton yarn. In addition, the hot melt resin may be used alone or in combination of two or more of thermoplastic polyurethane (TPU) resins, polyester resins, polyurethane resins, acrylic resins, polyamide resins, ethylene vinyl acetate resins, and polyolefin resins.

In addition, the inorganic particle is SiO ₂ , CaCO ₃ , CaSO ₄ , TiO ₂ , ZnO, ZrO ₂ , Al ₂ (SO ₄ ) ₃ , WS ₂ , graphene oxide (Graphene oxide), UV Shielding nanopowder 1 selected from the group consisting of One or more may be used, and the inorganic particles may be spherical, elliptical, fibrous, columnar, or random, and have a size of approximately 50 nm to 50 μm.

In this way, it was confirmed that the inorganic particles were mixed with the hot melt resin and coated on the surface of the yarn 11 to increase the initial modulus of elasticity (Young's Modulus) of the coated yarn (see FIG. 7). In this case, the inorganic particles 14 are preferably mixed in an amount of 1.0 to 1.5 parts by weight based on 100 parts by weight of the hot melt resin. When the inorganic particles 14 are mixed at less than 1.0 parts by weight with respect to 100 parts by weight of the hot melt resin, the effect of increasing the initial modulus (Young's Modulus) is significantly reduced, and when the amount exceeds 1.5 parts by weight, the elongation of the coating yarn due to the inorganic particles (14) ) was found to be significantly reduced.

2 to 5 show an embodiment of the resin-coated yarn manufacturing system according to the present invention for manufacturing the resin-coated yarn 10 of the present invention as described above.

Referring to FIG. 2, the resin-coated yarn manufacturing system includes a yarn supply unit 110 to which a yarn reel 112 to be coated is mounted, and a yarn 11 that is unwound and transported from the yarn supply unit 110 passes through the resin A coolant mist (M ) and cooling air are sprayed to perform primary cooling, and the coating yarn 10 passing through the primary cooling unit 130 passes through the cooling water stored in the water tank for secondary cooling. unit 140, a drying unit 150 that performs tension control and drying functions of the coated yarn 10 that has passed through the secondary cooling unit 140, and the coated yarn 10 that has passed through the drying unit 150 It includes a coated yarn recovery unit 160 having an unloader shaft 162 to which a recovery reel 161 for winding the yarn is rotatably mounted.

In the yarn supply unit 110, a yarn reel 112 on which yarn 11 is wound is installed on a feeder shaft 111. The feeder shaft 111 may be rotatably installed in the yarn supply unit 110 . Therefore, when the feeder shaft 111 rotates, the yarn reel 112 rotates together to release the yarn. However, when the central axis of the feeder shaft 111 is the same as the conveying direction of the yarn 11 or is disposed obliquely at a certain angle with respect to the conveying direction of the yarn 11, the feeder shaft 111 is attached to the yarn supply unit 110 In a fixedly installed state, the yarn 11 may be released from the yarn reel 112 and transported.

The resin coating unit 120 includes a hopper 122 for supplying hot melt resin in the form of pellets and inorganic particles 14 (see FIG. 1), and the hot melt resin supplied through the hopper 122 is heated to melt and melt. A melt extruder 121 for producing and transporting a resin mixture 12 (see FIG. 1) while mixing inorganic particles with hot melt resin, and a resin made in the melt extruder 121 installed in communication with the discharge port of the melt extruder 121 A coating nozzle 123 receiving the mixture 12 is included.

The yarn 11 that is released and transported from the yarn supply unit 110 is coated with a high-temperature (approximately 190 ° C. to 210 ° C.) resin mixture 12 on the surface while passing through the coating nozzle 123, so that the coated yarn 10 becomes At this time, since the resin mixture 12 coated on the surface of the yarn 11 is in an uncured state, when it passes through the cooling water at high speed, the resin mixture 12 is damaged or deformed by the resistance of the water and becomes non-uniform, and the sphericity and centrality will decrease.

Therefore, the coating yarn 10 passing through the coating nozzle 123 is directly transported to the secondary cooling unit 140 where the cooling water is stored, and the primary cooling unit 130 sprays cooling water mist (M) and cooling air without cooling. After being primarily cooled in ), it is transferred to the secondary cooling unit 140 in which cooling water is stored and is secondaryly cooled.

As shown in FIGS. 2 to 4 , the primary cooling unit 130 for this purpose is installed in the primary cooling chamber 131 through which the coating yarn 10 passes, and on the upper side of the primary cooling chamber 131. It may include a plurality of mist nozzles 132 for spraying cooling water mist M downward, and an air nozzle 133 for spraying cooling air into the primary cooling chamber 131.

The plurality of mist nozzles 132 are preferably arranged at regular intervals along the moving path of the coating yarn 10 . At this time, as shown in FIG. 4, a plurality of mist nozzles 132 are arranged at predetermined intervals on both sides of the moving path of the coating yarn 10, and the discharge port of the mist nozzle 132 is perpendicular to the ground It is preferably installed inclined at a predetermined angle with respect to one axis and configured to spray the cooling water mist (M) toward the coating yarn (10).

In this way, a plurality of mist nozzles 132 are arranged on both sides of the moving path of the coating yarn 10, and each is installed inclined at an angle with respect to an axis perpendicular to the ground toward the coating yarn 10 When the cooling water mist (M) is configured to be sprayed, the cooling water mist (M) is spread and sprayed over a wide area, and not only the upper part of the coating yarn 10 but also the side and lower parts are generally uniformly contacted to obtain a uniform cooling effect. there is. That is, when the cooling water mist (M) is sprayed in a vertical direction directly above the coating yarn 10, the spreading area of the cooling water mist (M) can be relatively narrowed, and the cooling water mist (M) Although can only be applied to the top of the coated yarn 10, when the mist nozzle 132 sprays the coolant mist M obliquely from both sides of the upper part of the coated yarn 10, the coolant mist M is sprayed over a wide area , There is an advantage in that the cooling effect can be obtained substantially uniformly over the entire coating yarn 10 by being able to be buried on the top, side, and bottom of the coated yarn 10.

In order to further widen the spray area of the cooling water mist M sprayed by the plurality of mist nozzles 132 and promote uniform mist spray, as shown in FIG. 5, a plurality of mist nozzles 132 are provided with a coating yarn 10) may also be installed at an angle to the movement path so that the cooling water mist M is sprayed obliquely with respect to the movement path of the coating yarn 10.

It is preferable that the temperature of the cooling water mist M sprayed from the mist nozzle 132 is about 8 to 15° C., the spray pressure is 0.7 to 1.5 kg/cm 2 , and the spray flow rate is 0.15 to 1.2 L/min. It was confirmed that the cooling effect of the cooling water mist M sprayed from the primary cooling unit 130 is excellent as the particles are smaller.

The air nozzle 133 is disposed between the mist nozzles 132 and injects cooling air downward to perform a cooling action together with the cooling water mist (M).

In addition, in order to obtain a sufficient slow cooling effect in the primary cooling chamber 131 while minimizing the increase in the overall size of the manufacturing system, as shown in FIG. A plurality of guide members 134 passing through while the coating thread 10 is wound may be installed on both sides of the primary cooling chamber 131 so as to move. The guide member 134 may be configured using a pulley or a roll.

Referring back to FIG. 2 , the secondary cooling unit 140 is disposed on the downstream side of the primary cooling unit 130 based on the transport path of the coated yarn 10, while passing through the primary cooling unit 130. The firstly cooled coating yarn 10 is immersed in the cooling water stored in the water tank 141 of the secondary cooling unit 140 and is sufficiently cooled and then transported.

In the reservoir 141 of the secondary cooling unit 140, an upstream guide roll 142, a submerged guide roll 143, and a downstream guide roll 144 guide the coated yarn 10 into the cooling water of the reservoir 141 can be installed.

The drying unit 150 is installed on the downstream side of the secondary cooling unit 140, and removes moisture from the surface of the coating yarn 10 while maintaining a constant tension of the coating yarn 10 to dry it. is configured to

Referring to FIG. 3 , the drying unit 150 includes a housing 151 in the form of a rectangular parallelepiped body disposed between the secondary cooling unit 140 and the coated yarn recovery unit 160, and the inside of the housing 151. A pair of dewatering rollers 152, which are arranged vertically and pass through while the coating yarn 10 passing through the secondary cooling unit 140 is wound multiple times, and compressed air is injected into the inside of the housing 151. It may include an air sprayer 153 for drying the coating yarn.

Two dehydration rollers 152 are composed of a pair and rotate in the same direction inside the housing 151 to guide the coating yarn 10 and perform dehydration and tension maintenance functions. At this time, the guide groove 152a guided while the coating yarn 10 is inserted into the outer surface of the dewatering roller 152 is formed so that the coating yarn 10 can be accurately guided and transported without slipping on the outer surface of the dewatering roller 152. It is formed in a spiral along the direction.

The air sprayer 153 may be configured by applying a known air spray nozzle that is connected to an air pump (not shown) to spray compressed air.

Referring to FIG. 2, the coated yarn recovery unit 160 is an unloader shaft to which a cylindrical recovery reel 161 rotatably mounted to wind the coated yarn 10 dried through the drying unit 150 (162). The unloader shaft 162 rotates by receiving power from a motor (not shown) to wind the coated thread 10 around the reel 161 for recovery. Therefore, when the unloader shaft 162 receives power from a motor (not shown) and rotates at a constant speed, the coated yarn 10 is wound around the recovery reel 161. At this time, the coated yarn 10 has a constant force Since the yarn 11 of the yarn reel 112 mounted on the feeder shaft 111 of the yarn supply unit 110 is unwound and transported toward the resin coating unit 120 at a constant speed, coating and cooling of the resin mixture , a series of drying processes proceed continuously.

A detailed description of the method for manufacturing the resin-coated yarn using the resin-coated yarn manufacturing system having the configuration described above is as follows.

First, the reel on which the yarn 11 to be coated is wound is mounted on the feeder shaft 111, and the other end of the yarn is applied to each component of the resin-coated yarn manufacturing system, that is, the coating nozzle of the resin coating unit 120 ( 123), the primary cooling unit 130, the secondary cooling unit 140, and the drying unit 150, and then the recovery reel 161 mounted on the unloader shaft 162 of the coated yarn recovery unit 160. After connecting to ), when the unloader shaft 162 is rotated, the coated yarn is transferred while being wound around the recovery reel 161, and at this time, the yarn 1 mounted on the feeder shaft 111 is released from the yarn reel 112 While coming out, the yarn 11 is transferred toward the resin coating part 120 at a constant speed.

The yarn 11 released from the feeder shaft 111 passes through the coating nozzle 123 of the resin coating unit 120 while being transported at a constant speed (approximately 500 to 600 m/min). At this time, in the resin coating unit 120, the hot melt resin introduced through the hopper 122 is heated and melted, and inorganic particles are mixed with the melted hot melt resin to form a resin mixture 12 and supplied to the coating nozzle 122. Therefore, the high-temperature resin mixture 12 is coated to a predetermined thickness on the surface of the yarn 11 passing through the coating nozzle 122 to form the coated yarn 10.

The coated yarn 10 passing through the coating nozzle 122 of the resin coating unit 120 passes through the primary cooling chamber 130 of the primary cooling unit 130 . At this time, the mist nozzle 132 sprays the cooling water mist M from the upper side of the primary cooling chamber 130, and at the same time, cooling air is sprayed from the air nozzle 133, so that the coated yarn 10 is primarily cooled. . When the coating yarn 10 enters the primary cooling chamber 130, the temperature is approximately 190 °C to 210 °C.

While passing through the primary cooling unit 130, the coated yarn 10 cooled while passing through the cooling water stored in the reservoir 140 of the secondary cooling unit 140 disposed successively at the rear of the primary cooling chamber 130. cooled secondarily. When the coated yarn 10 passes through the primary cooling unit 130, the temperature is cooled to approximately 25 to 30 °C, and then, when passing through the secondary cooling unit 140, it is cooled to approximately 15 to 20 °C.

After passing through the secondary cooling unit 140, the coated yarn 10 enters the inside of the housing 151 of the drying unit 150, and then passes through a pair of dewatering rollers 152 multiple times to remove moisture, It is wound on the recovery reel 161 of the coating yarn recovery unit 160.

The coated yarn 10 wound on the recovery reel 161 is then moved to a maturation room and subjected to an aging process at a predetermined temperature range for a predetermined period of time to increase tensile strength and adhesive strength before being shipped.

As described above, in the resin-coated yarn manufacturing system of the present invention, the coated yarn 10 coated with the resin mixture 12 on the surface of the yarn 11 passes through the cooling water in the water reservoir 141 while passing through the coating nozzle 123 The resin mixture 12 on the surface of the yarn 11 is damaged or deformation can be minimized. Therefore, the sphericity and centrality of the final product of the coated thread 10 can be significantly improved.

In order to confirm the performance of the resin-coated yarn produced by the manufacturing system of the present invention, 1.0, 1.5, 2.0, and 2.5 weights of ZnO and TiO ₂ as inorganic particles were added to 100 parts by weight of thermoplastic polyurethane (TPU) resin as a hot melt resin, respectively. The mixture is mixed in portions and put into the resin coating unit 120 to prepare the resin mixtures 12, and PET 125De is applied as the yarn 11 to prepare coated yarn samples, and then the tensile strength and elongation of each coated yarn sample , sphericity, and centrality were measured.

7 and 8 show graphs of tensile strength according to the blending amount when ZnO and TiO ₂ are applied as inorganic particles, respectively, and it is shown that there is little change in strength until the content of inorganic particles is 1.0 to 2.5 parts by weight, Differences appeared in Shinto. Among them, it was confirmed that the case containing 2.0 parts by weight of ZnO showed little change in elongation and a large increase in initial modulus of elasticity.

In addition, it was confirmed that the sphericity of the coated yarn sample was 75% or more, and the centrality was 1.2 or more.

Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the art will find the spirit of the present invention described in the claims to be described later. And it will be understood that the present invention can be variously modified and changed without departing from the technical scope.

The present invention can be applied to hot-melt resin-coated yarns used in adhesive fabrics or resin-coated yarns used in the manufacture of clothes, shoes, fashion accessories, etc., and technical fields related to their manufacture.

Claims

Resin-coated yarn manufactured by coating the surface of yarn with a resin mixture in which inorganic particles are mixed with hot-melt resin heated to a certain temperature and then cooled.
The method of claim 1, wherein the inorganic particles are SiO 2 , CaCO 3 , CaSO 4 , TiO 2 , ZnO, ZrO 2 , Al 2 (SO 4 ) 3 , WS 2 , graphene oxide, and UV shielding nanopowder. At least one selected from the group consisting of, having a size of 50 ㎚ ~ 50㎛, resin coated yarn mixed in 1.5 ~ 2.0 parts by weight based on 100 parts by weight of hot melt resin.
The process of claim 1, wherein the yarn is firstly cooled by cooling water mist and cooling air while being transported at a predetermined speed after the resin mixture is coated on the surface of the yarn, and then is secondarily cooled while passing through a water storage tank in which the cooling water is stored. Resin-coated yarn manufactured through
The resin-coated yarn according to claim 3, wherein the yarn is cooled while moving in a zigzag manner in a primary cooling chamber in which cooling water mist and cooling air are sprayed.
The resin-coated yarn according to claim 1, wherein the resin-coated yarn has a sphericity of 75% or more and a centrality of 1.2 or more.
A manufacturing system for manufacturing a resin-coated yarn in which a resin mixture in which inorganic particles are mixed with a hot melt resin is coated on the surface of the yarn,

A yarn supply unit in which a yarn reel on which a yarn to be coated is wound is mounted;

A resin coating unit including a coating nozzle through which the yarn released and transported from the yarn supply unit passes, and extruding while coating the resin mixture on the surface of the yarn by supplying a resin mixture in which inorganic particles are mixed with molten hot melt resin to the coating nozzle ;

a primary cooling unit for primary cooling by spraying cooling water mist and cooling air to yarns coated with a resin mixture (hereinafter referred to as 'coated yarns') transported through the resin coating unit;

A secondary cooling unit for secondary cooling by passing the cooling water stored in the water storage tank through the coated yarn passing through the primary cooling unit; and,

a coated yarn recovery unit having an unloader shaft to which a recovery reel for winding the coated yarn passing through the secondary cooling unit is rotatably mounted;

Resin coating yarn manufacturing system comprising a.
The method of claim 6, wherein the primary cooling unit comprises a primary cooling chamber through which the coating yarn passes, a plurality of mist nozzles installed on the upper side of the primary cooling chamber and spraying cooling water mist downward, and the primary cooling chamber A resin-coated yarn manufacturing system including an air nozzle for injecting cooling air into the inside.
The method of claim 7, wherein the primary cooling unit further includes a plurality of guide members installed on both sides of the primary cooling chamber so that the coating yarn moves in a zigzag shape within the primary cooling chamber and passes through the coating yarn while being wound. Resin coating yarn manufacturing system.
The system of claim 7, wherein the plurality of mist nozzles are arranged at regular intervals on both sides of the moving path of the coated yarn to spray cooling water mist toward the coated yarn.
10. The system according to claim 9, wherein the plurality of mist nozzles are installed inclined at a predetermined angle with respect to an axis perpendicular to the ground to spray cooling water mist toward the coated yarn.
[Claim 10] The system of claim 9, wherein the air nozzle is disposed between the mist nozzles to inject cooling air downward.
The method of claim 6, a housing disposed between the secondary cooling unit and the coated yarn recovery unit, and a pair of dewatering rollers disposed vertically inside the housing and passing the coated yarn passing through the secondary cooling unit while being wound , The resin-coated yarn manufacturing system further comprising a drying unit including an air spray unit for spraying compressed air to the inside of the housing to dry the coated yarn.
[Claim 13] The system for manufacturing resin-coated yarn according to claim 12, wherein a guide groove guided while the coated yarn is inserted is spirally formed on an outer surface of the dewatering roller along a circumferential direction.
A method for producing a resin-coated yarn in which a resin mixture in which inorganic particles are mixed with hot melt resin is coated on the surface of yarn,

(S1) feeding the yarn at a constant speed;

(S2) heating and melting the hot melt resin and passing the yarn through an extruder supplied with a resin mixture made by mixing inorganic particles with the melted hot melt resin to coat the surface of the yarn with the resin mixture to form a coated yarn;

(S3) primary cooling while passing the coating coated with the resin mixture through a primary cooling chamber in which cooling water mist and cooling air are sprayed;

(S4) secondary cooling while passing the coated yarn passing through the primary cooling chamber through a reservoir in which cooling water is stored; and,

(S5) winding and recovering the coated yarn passing through the reservoir;

Method for producing a resin coated yarn comprising a.
15. The method of claim 14, wherein the coated yarn is cooled while moving zigzag inside the primary cooling chamber when the coated yarn passes through the primary cooling chamber.