KR100783802B1 - Manufacturing method of surface-modified yarn by uv and apparatus thereof - Google Patents

Abstract

A method and an apparatus for manufacturing a yarn are provided to reduce the process cost and the process time, by separating a process of submerging yarns in a hydrophilic monomer solution and a process of submerging the yarns in a light initiator and applying UV to the yarns at the same time. An organic solvent containing a light initiator is applied to yarns of 200-15,000 strands. The yarns are submerged in a hydrophilic monomer solution. The submerged yarns are transferred to a reaction chamber. UV rays are applied to the yarns to introduce surface modification of the yarns through surface grafting. The yarns are hydrophobic polyester or polyolefin yarns. The organic solvent contains 1-20 wt% of light initiator based on 100 wt% of the organic solvent.

Description

Method of manufacturing yarn modified surface by irradiating ultraviolet rays and its device {MANUFACTURING METHOD OF SURFACE-MODIFIED YARN BY UV AND APPARATUS THEREOF}

1 is a conceptual diagram showing the grafting polymerization of yarns through UV irradiation.

2A and 2B are schematic views of yarn surfaces obtained through the present invention.

3 is a schematic view of the UV treatment apparatus of the present invention.

<Description of the symbols for the main parts of the drawings>

1: warp beam or tricot beam 2: untreated yarn

3: first solution tank 4: outlet

5, 10, 20: upper guide 6, 11, 21: lower guide

7: drying part 8: second solution water tank

9: outlet 12: reaction chamber

13: nitrogen gas inlet 14: nitrogen gas outlet

15 UV lamp 16 quartz tube

17: cooling water circulation device 18: water washing bath

19: outlet 22: treated yarn

The present invention relates to a method and apparatus for manufacturing a hydrophilic yarn through UV irradiation, and more particularly, by grafting a hydrophilic polymer on the surface of the yarn through a continuous UV surface treatment in the weaving preparation process, improving the hydrophilicity of the yarn It relates to a method and an apparatus for making.

Generally, synthetic fibers such as polyester, nylon, acrylic, polyolefin, etc. have excellent physical properties and various uses, and can be manufactured at low cost, and the market size has been continuously growing. However, due to its hydrophobic nature, in addition to the above advantages, there are also disadvantages such as the generation of static electricity or poor sweat absorption when used for clothing. For this reason, in order to hydrophilize various synthetic fibers, various additives have been added, corona discharge, plasma treatment, and the like have been proposed. In general, the plasma treatment is carried out under vacuum, so it is impossible to mass-produce it by a method that cannot be continuously processed. In the case of hydrophilization through the addition of additives as disclosed in Japanese Patent 2004-197244, the polymer resin, which is a raw material of yarn, is newly polymerized. There was a difficulty to do.

On the other hand, in the case of modifying the surface of the yarn through photoinitiated grafting by UV has the advantage that the existing UV curing equipment can be used as it is and the continuous processing is possible. In case of surface treatment by UV irradiation, the treatment time is longer than that of corona discharge or plasma treatment.However, this problem can be solved through the selection of an optimal photoinitiator, monomer selection method, and improvement of UV lamp efficiency. Can be.

 Due to the above-mentioned advantages, patents have recently been applied in various fields related to surface modification through UV irradiation. As an example, US Patent No. 5,236,464 proposes a monomer optimized for nylon and a photoinitiator system in order to improve the stain resistance of nylon fibers, but the continuous treatment in the manner that the immersion time and the UV treatment time range from several minutes to several tens of minutes. This is an impossible method.

 U.S. Patent No. 5,039,549 proposes a method and apparatus for improving the adhesion of polyolefin fibers, but it is a device capable of processing a single strand of fiber, which is difficult to apply to general yarns due to low productivity and very low grafting efficiency. After the monomer solution is immersed, UV irradiation is applied (J. Korean Fiber Soc., Vol. 32, No. 1, 1995).

1 is a schematic diagram showing the grafting polymerization reaction of yarn through UV irradiation, using a hydrogen decyclic photoinitiator such as benzophenone to form radicals on the yarn surface and graft polymerization of monomers having functional groups thereon. The surface modification is carried out by introducing a hydrophilic reactor to the surface by the method.

 However, due to the nature of the yarn manufacturing process, its spinning speed [about 3000 ~ 6000MPM] is so fast that it is impossible to secure sufficient UV light irradiation time and the surface treatment of the final product when applying the heat setting process of the fabric which is relatively slow and easy to process Because of this, there is a problem of severe use restriction. In addition, when irradiating UV individually by one strand of the yarn, there was a problem that the time and cost required for UV irradiation are very high.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to UV irradiation of 200 ~ 15,000 yarns at once, and to separate the immersion step of the photoinitiator and the hydrophilic monomer solution can reduce the process time and cost It is to provide a method for producing a yarn modified surface by irradiation with ultraviolet rays.

Another object of the present invention is to provide a yarn manufacturing apparatus that can irradiate 200 to 15,000 yarns at once according to the production method of the present invention.

In order to achieve the above-described technical problem of the present invention, a method for producing ultraviolet-irradiated surface-modified yarns includes: (1) applying an organic solvent containing a photoinitiator to 200 to 15,000 yarns; (2) immersing the yarns in a hydrophilic monomer solution; (3) transferring the immersed yarn to the reaction chamber and irradiating UV to induce modification by surface grafting.

The yarn may preferably be a hydrophobic polyester or polyolefin yarn.

The photoinitiator is preferably contained in an amount of 1 to 20% by weight based on 100% by weight of the organic solvent, and the photoinitiator is composed of benzophenone, benzophenone derivative, thioxanthone, thioxanthone derivative, acetofetone and acetofetone derivative. Any one or more selected from the group may be used, and the organic solvent may be one capable of dissolving the photoinitiator, such as acetone.

Preferably between the steps (1) and (2) may further comprise a step of hot air drying to volatilize the organic solvent except for the photoinitiator, the hot air drying time is preferably within 5 seconds.

The hydrophilic monomer solution is preferably any one or more solutions selected from the group consisting of monofunctional acrylate, polyfunctional acrylate, and vinyl ether, more preferably hydroxy alkyl acrylate, 1,6 -Hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, maleic anhydride, 4-cyclohexane dimethanol vinyl ether, hydroxy butyl vinyl ether and cyclohexyl Any one or more solutions selected from the group consisting of vinyl ethers can be used.

The concentration of the monomer is preferably 1 to 10 mol / l, the immersion time is 1 second to 10 seconds.

The reaction chamber is preferably filled with nitrogen and comprises a quartz tube reflecting a small amount of infrared radiation irradiated from a UV lamp, wherein the fiber passes through the quartz tube.

The UV preferably has a wavelength of 320 ~ 440 nm, it is irradiated for 1 second to 20 seconds.

After the step (3), preferably may further comprise a washing step for removing the unreacted monomer and photoinitiator, in this case the liquid used in the washing step is a mixture of water and organic solvent.

Ultraviolet irradiation surface modification yarn production apparatus for achieving the technical problem of the present invention, the inclined beam or tricot beam wound 200 to 15,000 yarns; A first solution bath in which the yarns are supplied in parallel to be impregnated in an organic solvent containing a photoinitiator; A second solution bath in which the yarns passing through the first solution bath are impregnated into a hydrophilic monomer solution; A reaction chamber for irradiating UV to the yarns passing through the second solution bath; And a washing bath for washing the photoinitiator and the hydrophilic monomer not reacted in the reaction chamber.

The yarn manufacturing apparatus may further include a drying unit installed between the first solution bath and the second solution bath to evaporate the organic solvent applied to the yarns.

Preferably, the first solution bath, the second solution bath, and the third solution bath are provided with a plurality of upper and lower guides in the transverse direction, and the yarns sequentially pass through the upper guide and the lower guide. do.

The reaction chamber is preferably a lamp for irradiating UV to the yarn; And a quartz tube reflecting a small amount of infrared radiation emitted from the lamp, wherein the yarns may be passed into the quartz tube.

The width of the beam is preferably 500 to 3000 mm and the winding speed is 50 to 400 MPM.

Hereinafter, the present invention will be described in more detail.

The method for producing a UV-irradiated surface modified yarn of the present invention comprises the steps of: (1) applying an organic solvent containing a photoinitiator to 200 to 15,000 yarns; (2) immersing the yarns in a hydrophilic monomer solution; (3) transferring the immersed yarn to the reaction chamber and irradiating UV to modify the surface of the yarn by a grafting polymerization reaction.

In order to manufacture a conventional UV-irradiated surface-modified yarn, UV is irradiated immediately after the yarn is manufactured as described above. Accordingly, since UV is individually irradiated one strand of yarn, there is a problem that the time and cost required for UV irradiation is very much consumed. In addition, due to the nature of the yarn manufacturing process, the manufacturing speed (about 3000 ~ 6000MPM) is too fast, it was difficult to secure a relatively sufficient UV irradiation time. Furthermore, when the heat setting process of a relatively slow and easy-to-treat fabric is applied, the surface of the final product is severely used, which causes severe application constraints.

In the present invention, after manufacturing the yarn, the yarn is wound 200 ~ 15,000 (strands) in the beam and transported in parallel at the same time by irradiating UV to the aggregate of yarn strands instead of one strand of yarn at the same time the efficiency of the UV irradiation process Maximized.

Furthermore, the photoinitiator and the hydrophilic monomer are separated from each other by passing the yarn through a mixture liquid of the conventional photoinitiator and the hydrophilic monomer so that the photoinitiator and the hydrophilic monomer can be sufficiently applied to the yarn, UV Shorten the irradiation time.

Looking at the manufacturing method of the ultraviolet irradiation surface modified yarn of the present invention in detail, first, an organic solvent containing a photoinitiator is applied to 200 ~ 15,000 yarn (strand) yarn.

Yarns usable in the present invention can be applied to all synthetic fibers that can be produced in filament form, but preferably a relatively hydrophobic polyester or polyolefin yarn can be used.

On the other hand, in the present invention, instead of processing the yarns one by one, 200 to 15,000 (strands) of yarns are transported in parallel and processed at once, thereby saving time and cost required for UV irradiation.

An organic solvent containing a photoinitiator is applied to the transferred yarns. At this stage the fiber swells to facilitate attachment of the initiator and monomer. There is no limitation on the coating method, and preferably, a method of immersing the yarns in the organic solvent may be used, and the immersion time is sufficient to sufficiently impregnate the organic solvents in the yarns. In this case, the composition of the organic solvent containing the photoinitiator contains 1 to 20% by weight of the photoinitiator with respect to 100% by weight of the organic solvent. If the content of the photoinitiator is less than 1% by weight, the grafting polymerization does not effectively occur. If the content of the photoinitiator exceeds 20% by weight, the grafting reaction may be terminated by radicals of the initiator, and thus the grafting efficiency may be decreased.

The organic solvent which can be used by this invention uses what can melt | dissolve the following photoinitiators, such as acetone.

The photoinitiator usable in the present invention may be any one or more selected from the group consisting of benzophenone, benzophenone derivatives, thioxanthone, thioxanthone derivatives, acetofetone and acetofetone derivatives. Among these, benzophenone and its derivatives are benzophenone and benzophenone derivatives are benzophenone, 4-phenylbenzophenone, 4-methoxybenzophenone, 4,4'-dimethoxy-benzophenone, 4,4'-dimethylbenzophenone , 4,4'-dichlorobenzophenone, 4,4'-dimethylaminobenzophenone, 4,4'-diethylaminobenzophenone, 4-methylbenzophenone, 2,4,6-trimethylbenzophenone, 4- ( 4-Methylthiophenyl) -benzophenone, 3,3'-dimethyl-4-methoxy-benzophenone, methyl-2-benzoyl benzoate, 4- (2-hydroxyethylthio) -benzophenone, 4- ( 4-tolylthio) benzophenone, 4-benzoyl-N, N, N-trimethylbenzenemethanealuminum chloride, 2-hydroxy-3- (4-benzoylphenoxy) -N, N, N-trimethyl-propaneami Chloride monohydrate, 4- (13-acryloyl-1,4,7,10,13-pentaoxatridecyl) -benzophenone and 4-benzoyl-N, N-dimethyl-N- [2- (1 -Oxo-2-propenyl) oxy] ethyl-benzenemethanealuminum chloride and the like can be used.

The thioxanthone and thioxanthone derivatives that can be used include thioxanthone, 2-isopropyl thioxanthone, 2-chlorothioxanthone, 2-dodecyl thioxanthone, 2,4-diethyl thioxanthone, 2, 4-dimethyl thioxanthone, 1-methoxycarbonyl thioxanthone, 2-ethoxycarbonyl thioxanthone, 3- (2-methoxyethoxycarbonyl)-thioxanthone, 4-butoxycarbonyl-tee Oxanthone, 3-butoxycarbonyl-7-methylthioxanthone, 1-cyano-3-chlorothioxanthone, 1-ethoxycarbonyl-3-chlorothioxanthone, 1-ethoxycarbonyl- 3-ethoxy thioxanthone, 1-ethoxy-carbonyl-3-amino thioxanthone, 1-ethoxycarbonyl-3-phenylsulfuryl thioxanthone, 3,4-di [2- (2-methoxy Ethoxy) ethoxycarbonyl] thioxone, 1-ethoxycarbonyl-3- (1-methyl-1-morpholino-ethyl) -thioxone, 2-methyl-6-dimethoxymethyl-ti Oxanthone, 2-methyl-6- (1,1-dimethoxy-benzyl) -thioxone, 2-morpholinomethylthioxanthone, 2-methyl-6-morpholinomethyl-thioxanthone, N Allyl thioxanthone-3,4-dicarboximide, N -Octylthioxanthone-3,4-dicarboximide, N- (1,1,3,3-tetramethylbutyl) -thioxanthone-3,4-dicarboximide, 1-phenoxycityoxanthone, 6 Ethoxycarbonyl-2-methoxythioxanthone, 6-ethoxycarbonyl-2-methylthioxanthone, thioxanthone-2-polyethylene glycol ester and 2-hydroxy-3- (3,4-dimethyl -9-oxo-9H- thioxanthone-2-yloxy) -N, N, N-trimethyl-1-propaneaminium chloride and the like can be used.

Acetofetone and acetofetone derivatives that can be used include acetophenone, 3-methoxyacetophenone, 4-phenylacetophenone and the like.

On the other hand, when only one type of photoinitiator is used, it is preferable to use only benzophenone since thioxanthones are more expensive than benzophenones, and photoinitiators having different ultraviolet absorption wavelength ranges may be used to obtain more satisfactory grafting efficiency. It is possible to obtain excellent results in terms of efficiency and effect by using synergistic effects of photoinitiators. More specifically, 1 to 15% by weight of a benzophenone or benzophenone derivative having an ultraviolet absorption wavelength band of about 200 to 300 nm and a thioxanthone or tea having an ultraviolet absorption wavelength band of about 200 to 420 nm with respect to the organic solvent. When grafting with ultraviolet radiation by adding 1 to 5% by weight of oxanthone derivatives at the same time, the grafting efficiency can be obtained about 7 times higher than that of benzophenone alone.

Next, the organic solvent containing the photoinitiator may be dried in order to selectively remove only the organic solvent from the yarns coated with the organic solvent. The drying method is not limited if the method of removing only the organic solvent by leaving only the photoinitiator in the yarn, but preferably can only selectively remove the organic solvent through hot air drying. In this case, the temperature range of the hot air drying is preferably 50 ~ 70 ℃, hot air drying time is preferably within 5 seconds.

Next, the yarns from which the organic solvent has been selectively removed in the drying process are immersed in a hydrophilic monomer solution so that the monomers involved in the grafting can be uniformly attached to the surface of the yarn. The hydrophilic monomers usable in the present invention can be used by selecting one or more from the group consisting of monofunctional or polyfunctional acrylates and vinyl ethers. More specifically, trifunctional trimethylolpropane triacrylate, such as monofunctional hydroxy alkyl acrylate (HEA, HPA), bifunctional 1, 6-hexanediol diacrylate (HDDA), etc. Compounds such as TMPTA), tetrafunctional or higher pentaerythritol tetraacrylate (PETA) and dipentaerythritol pentaacrylate (DPETA), and compounds such as maleic anhydride which are anhydrides, and 4-cyclohexane as vinyl ethers. Dimethanol vinyl ether, hydroxy butyl vinyl ether, cyclohexyl vinyl ether and the like can be used.

On the other hand, Figure 2a is a yarn using a monofunctional acrylate as a hydrophilic monomer, Figure 2b is a yarn using a multifunctional acrylate, the yarn using a multifunctional acrylate has a gel-like shape, so that the water absorption is further improved.

On the other hand, the concentration of the hydrophilic monomer is preferably 1 to 10 mol / l. When the monomer concentration is 1 mol / l or less, the concentration of monomers involved in the reaction is low, so that the grafting efficiency is lowered. At 10 mol / l or more, it is difficult to uniformly attach and the yarn quality cannot be controlled due to the rapid crosslinking reaction.

As the solvent used in the hydrophilic monomer solution, most polar solvents capable of dispersing the water-soluble monomer may be used, but water is most preferably used.

Next, transfer the yarns immersed in the hydrophilic monomer solution to the reaction chamber and then irradiated with UV to modify the surface of the yarn by the grafting polymerization reaction, to obtain a surface-modified yarn in this step.

In the present invention, UV lamps have a width of 2M to improve production speed, and are arranged in a total of four rows, but are not limited thereto. When the heat generated from the UV lamp reaches the yarn, the yarn may be deteriorated and the monomer may be destroyed. Thus, the infrared rays are reflected through the quartz tube and the heat of the reaction chamber is dissipated through the cooling water circulator. In the case of the grafting reaction, a stop reaction occurs when oxygen atoms are present in the vicinity, and thus the reaction chamber is filled with nitrogen during the grafting reaction.

Meanwhile, the UV lamp preferably has a wavelength of 320 to 440 nm and preferably uses a high-pressure mercury lamp of 2000 to 5000 watts, and the irradiation time of the UV lamp is not limited as long as the reaction can occur sufficiently. You can irradiate for 1 to 20 seconds.

Next, a washing process for removing unreacted monomers and photoinitiators in which the grafting reaction is not performed in the yarns cured with UV may be further included. In this case, the liquid used in the washing process should be composed of a mixture of water and an organic solvent, because the photoinitiator is generally insoluble in water, and the monomer for surface modification is a water-soluble substance.

The surface-modified yarn through such a process can be made into a fabric through a weaving process.

Next, an ultraviolet irradiation surface modification yarn manufacturing apparatus according to an embodiment of the present invention will be described.

The manufacturing apparatus of the present invention is a device that performs only the above-described manufacturing method, and specifically described with reference to FIG. 3, the inclined beam or the tricot beam 1, in which 200 to 15,000 yarns are wound, the yarns A second solution bath (8) in which the yarns passed through the first solution bath (3) are impregnated in a hydrophilic monomer solution, supplied in a parallel state and impregnated in an organic solvent containing a photoinitiator, A reaction chamber 12 for irradiating UV to the yarns passing through the second solution bath 8; And a washing bath 18 for washing the photoinitiator and the hydrophilic monomer which have not reacted in the reaction chamber 12.

First, 200 to 15,000 yarns are wound on a warp beam or tricot beam 1. For this purpose, the width of the warp beam or the tricot beam 1 may be used that is 500 ~ 3000mm.

The untreated yarns 2 conveyed from the warp beam or tricot beam 1 are transferred to the first solution bath 3 in order to apply the photoinitiator. At this time, the untreated yarn 2 is preferably concentrated and conveyed in parallel transverse direction, which is advantageous to maximize efficiency.

The first solution bath (3) contains an organic solvent containing a photoinitiator, the specific composition and content is as described above. The first solution bath 3 has a plurality of upper guides 5 and lower guides 6 in the transverse direction in order to increase the immersion time of the yarns, the transferred yarns are the upper guides 5 And pass through the lower guide (6) sequentially.

On the other hand, the first solution tank 3 may further include an outlet 4 for discharging the organic solvent not impregnated with the yarn.

Meanwhile, the manufacturing apparatus of the present invention may further include a drying unit 7 to selectively remove only the organic solvent with respect to the yarns passing through the first solution bath 3. In this case, the drying means usable may preferably use a hot air dryer, and the specific drying temperature and drying time are as described above.

The yarns passing through the drying part 7 are transferred to the second solution bath 12. The second solution bath comprises a water-soluble monomer aqueous solution, the type, content and immersion time of the water-soluble monomer aqueous solution is as described above. The first solution bath 8 is provided with a plurality of upper guides 10 and lower guides 11 in the transverse direction in order to increase the immersion time of the yarns, the transferred yarns are the upper guides 10 And pass through the lower guide 12 sequentially.

On the other hand, the second solution tank 8 may further include a discharge port (9) for discharging the used aqueous aqueous solution of the monomer.

The yarns passing through the second solution bath 8 are transferred to the reaction chamber 12 in order to perform a grafting reaction by irradiating UV. On the other hand, since the grafting reaction by irradiation of UV is most efficient in a nitrogen atmosphere, the reaction chamber 12 may include a nitrogen gas inlet 13 and a nitrogen gas outlet 14.

The yarns undergo a reforming reaction by surface grafting as they pass through the UV lamp 15. At this time, the UV lamp has a width of 2m to improve the production speed, can be arranged in a total of four rows or more rows to improve efficiency. On the other hand, when the heat (infrared rays) generated from the UV lamp reaches the yarn, the yarn may be deteriorated and the monomers may be destroyed. Thus, the infrared ray is reflected through the quartz tube 16 and the ultraviolet rays pass through the inside, and the coolant circulator 17 The heat of the reaction chamber 12 is dissipated through). In this case, the yarns pass through the inside of the quartz tube 16 to perform a grafting reaction.

The yarns passing through the reaction chamber 12 are transferred to a washing bath 18 for washing the unreacted photoinitiator and the water-soluble monomer in which the grafting reaction is not performed. The type, content and immersion time of the flushing solution used in the flushing bath are as described above. The washing tub 18 has a plurality of upper guides 20 and lower guides 21 in the transverse direction in order to increase the washing efficiency of the yarns, the transferred yarns are the upper guide 20 and the The lower guide 21 is sequentially passed through.

On the other hand, the flushing bath 18 may further include a discharge port 19 for discharging the used flushing solution.

Hereinafter, the present invention will be described in detail by Examples and Experimental Examples. The following Examples and Experimental Examples are only illustrative of the present invention, and the scope of the present invention is not limited to the following Examples and Experimental Examples.

<Example 1>

8000 polyester SDY 75/36 were fixed to the inclined beam. At this time, the winding speed of the beam is 150 MPM. The yarn was then immersed in an acetone solution containing 5% by weight of benzophenone, dried by hot air for 2 seconds with hot air at 60 ° C., and then passed through a 2 mol / L aqueous acrylic acid solution, followed by 120 W / cm Graft polymerization was performed by irradiating ultraviolet radiation with an ultraviolet curing device equipped with a medium pressure mercury lamp. At this time, the ultraviolet irradiation intensity was 5.2J / cm 2. The final yarn was prepared by washing the grafted yarn with a solvent consisting of isopropyl alcohol and methylethylketone to remove unreacted monomers and homopolymers.

<Example 2>

A final yarn was manufactured in the same manner as in Example 1 except that the winding speed of the beam was 300 MPM.

 <Example 3>

A final yarn was prepared in the same manner as in Example 1 except that the concentration of the acrylic acid aqueous solution was 5 mol / L.

<Example 4>

The final yarn was manufactured in the same manner as in Example 1 except that the winding speed of the beam was 300 MPM and the concentration of the acrylic acid aqueous solution was 5 mol / L.

Example 5

A final yarn was prepared in the same manner as in Example 1 except that the yarn was immersed in an acetone solution containing 8% by weight of benzophenone.

<Example 6>

The final yarn was prepared in the same manner as in Example 1 except that the yarn was immersed in an acetone solution containing 8% by weight of benzophenone, and the winding speed of the beam was 300 MPM.

<Example 7>

The final yarn was prepared in the same manner as in Example 1 except that the yarn was immersed in an acetone solution containing 8% by weight of benzophenone and the concentration of the acrylic acid aqueous solution was 5 mol / L.

<Example 8>

The final yarn was prepared in the same manner as in Example 1 except that the yarn was immersed in an acetone solution containing 8% by weight of benzophenone, the aqueous solution of acrylic acid was 5 mol / L, and the winding speed of the beam was 300 MPM. It was.

Comparative Example 1

 After squeezing PET SDY 75/36 yarns, yarns without UV treatment were obtained.

Experimental Example

The physical properties of the yarns prepared in Examples 1 to 8 and Comparative Examples were evaluated as shown in Table 1 below.

1. Measurement of yarn fineness, strength and elongation

The fineness of the yarn was obtained by winding 90m of a 1m skein in a single rotation and measuring the weight and converting it to 9000m.

The strength and elongation of the fibers were measured according to the KS K 0412 test method. The equipment used was measured using a textechno tensile tester at a speed of 50 cm / m and a gripping distance of 50 cm.

2. Measurement of contact angle

The contact angle of distilled water with respect to the single fiber was measured by the Dynamic Wilhelmy method.

3. Measurement of absorbency

The weight after the yarn was dried at 105 ° C. for 2 hours in a vacuum oven and left for 48 hours at 25 ° C. and 65% RH was calculated and the absorption rate was calculated through Equation 1 below.

[Equation 1]

A = (Wb-Wd) / Wd * 100

A: Absorption rate Wb: Weight of yarn before drying Wd: Weight of yarn after drying

4. Measurement of Graft Rate

The weight before and after the graft was measured to determine the graft ratio through the following Equation 2.

[Equation 2]

Ge = (Fw-Iw) / Iw * 100

Ge: graft rate Fw: final weight of grafted fiber Iw: fiber weight before grafting

TABLE 1

As shown in Table 1, the yarn of the present invention has a water absorption of 4% or more and at the same time did not cause a decrease in physical properties such as strength and elongation.

In the present invention, after the yarn is manufactured, 200 ~ 15,000 strands of the yarn is wound in the beam and transported in parallel to simultaneously irradiate UV to the aggregate of yarn strands, not a single strand of yarn to maximize the efficiency of the UV irradiation process It was.

Furthermore, the photoinitiator and the hydrophilic monomer are separated from each other by passing the yarn through a mixture liquid of the conventional photoinitiator and the hydrophilic monomer so that the photoinitiator and the hydrophilic monomer can be sufficiently applied to the yarn, UV Shorten the irradiation time and improve hydrophilicity.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims. .

Claims (23)

(1) applying an organic solvent containing a photoinitiator to 200-15,000 yarns; (2) immersing the yarns in a hydrophilic monomer solution; (3) The method of producing a yarn modified by irradiating ultraviolet light, characterized in that the transfer of the immersed yarn to the reaction chamber and irradiating UV to induce modification by surface grafting. The method of claim 1, The yarn is a hydrophobic polyester or polyolefin yarn, characterized in that the method of producing a yarn modified surface by irradiation with ultraviolet rays. The method of claim 1, The method of manufacturing a yarn modified surface by irradiating the ultraviolet light, characterized in that containing 1 to 20% by weight of the photoinitiator with respect to 100% by weight of the organic solvent. The method of claim 3, The photoinitiator is any one or more selected from the group consisting of benzophenone, benzophenone derivatives, thioxanthone, thioxanthone derivatives, acetofetone and acetofetone derivatives, the surface of which yarn Manufacturing method. The method of claim 3, The organic solvent is acetone, characterized in that the method for producing a yarn by modifying the surface by irradiation with ultraviolet rays. The method of claim 1, Method for producing a yarn modified surface by irradiating the ultraviolet light, characterized in that further comprising the step of hot-air drying to volatilize the organic solvent except the photoinitiator between the step (1) and (2). The method of claim 6, The hot air drying time is less than 5 seconds, characterized in that the method of manufacturing a yarn modified surface by irradiation with ultraviolet rays. The method of claim 1, Wherein said hydrophilic monomer solution is at least one solution selected from the group consisting of monofunctional acrylate, polyfunctional acrylate, and vinyl ether. The method of claim 8, The hydrophilic monomer solution is hydroxy alkylacrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, maleic anhydride, 4-cyclohexane di A method for producing a yarn having a surface modified by irradiating the ultraviolet light, characterized in that at least one solution selected from the group consisting of methanol vinyl ether, hydroxy butyl vinyl ether and cyclohexyl vinyl ether. The method of claim 1, Immersion time in the step (2) is a method of manufacturing a yarn modified surface by irradiating the ultraviolet light, characterized in that 1 ~ 10 seconds. The method of claim 1, The reaction chamber is filled with nitrogen, characterized in that the method for producing a yarn modified surface by irradiating the ultraviolet light. The method of claim 1, The reaction chamber includes a quartz tube reflecting a small amount of infrared radiation irradiated from the UV lamp, wherein the fiber is passed through the quartz tube, characterized in that for irradiating the ultraviolet light to modify the surface of the yarn manufacturing method. The method of claim 1, The UV has a wavelength of 320 ~ 440 nm, the method of producing a yarn modified surface by irradiating the ultraviolet light, characterized in that irradiated for 1 second to 20 seconds. The method of claim 1, After the step (3), the method of producing a yarn by modifying the surface by irradiating the ultraviolet light, characterized in that it further comprises a washing step for removing the unreacted monomer and photoinitiator. The method of claim 14, The liquid used in the washing step is a method of producing a yarn modified surface by irradiating the ultraviolet light, characterized in that the mixture of water and an organic solvent. The method of claim 1, The concentration of the hydrophilic monomer is 1 ~ 10 mol / ℓ characterized in that the method of producing a yarn modified surface by irradiation with ultraviolet rays. A yarn made by the method of any one of claims 1 to 16. Warp beam or tricot beam in which 200 to 15,000 yarns are wound; A first solution bath in which the yarns are supplied in parallel to be impregnated in an organic solvent containing a photoinitiator; A second solution bath in which the yarns passing through the first solution bath are impregnated into a hydrophilic monomer solution; A reaction chamber for irradiating UV to the yarns passing through the second solution bath; And And a washing bath for washing the photoinitiator and the hydrophilic monomer that have not reacted in the reaction chamber. The method of claim 18, The yarn manufacturing apparatus further includes a drying unit installed between the first solution tank and the second solution tank to evaporate the organic solvent applied to the yarns. Yarn manufacturing device. The method of claim 18, The first solution tank, the second solution tank and the third solution tank is provided with a plurality of upper guides and lower guides in the transverse direction therein, the yarns are characterized in that passing through the upper guide and the lower guide in sequence Yarn manufacturing apparatus for modifying the surface by irradiating the ultraviolet rays. The method of claim 18, The reaction chamber, A lamp for irradiating the yarns with UV; And Including; quartz tube for reflecting a small amount of infrared light emitted from the lamp, The yarn is yarn manufacturing apparatus for modifying the surface by irradiating the ultraviolet light, characterized in that passing through the inside of the quartz tube. The method of claim 18, The width of the beam is 500 ~ 3000㎜ yarn manufacturing apparatus for modifying the surface by irradiating the ultraviolet light. The method of claim 18, Winding speed of the beam is 50 ~ 400MPM Yarn manufacturing apparatus for modifying the surface by irradiating the ultraviolet light.

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