KR20130130952A - Soluble conjugated hollow fiber and hollow yarn - Google Patents

Abstract

The present invention relates to soluble conjugated hollow fibers and conjugated hollow yarn. In the soluble conjugated hollow fibers of the present invention, a sheath unit is made up of polyester-based or polyamide-based synthetic resin, a core unit is made up of soluble polymers and some part of the core unit is exposed outside, forming into C type cross sectional hollow fibers after elution to produce soluble conjugated hollow fibers and hollow yarn with excellent hollow rate without morphological change in hollow. SOLUBLE CONJUGATED HOLLOW FIBER AND CONJUGATED HOLLOW YARN

Description

Soluble composite hollow fiber and composite hollow fiber {SOLUBLE CONJUGATED HOLLOW FIBER AND HOLLOW YARN}

The present invention relates to a usable composite hollow fiber and a composite hollow fiber, and more particularly, to a usable composite hollow fiber and a composite hollow fiber having excellent hollow modulus without a change in hollow form formed in the fiber.

Synthetic fibers such as polyester and polyamide are widely used not only for clothing but also for industrial use due to their excellent physical and chemical properties, and have industrially important values. However, these synthetic fibers have a single distribution of single yarn fineness, and have a drawback that is different from natural fibers such as hemp and cotton in thermal insulation. To remedy these defects, hollowing synthetic fibers is widely used. It is done.

In general, the hollow fiber having a high hollow ratio has a low specific gravity because the fiber having a high hollow ratio contains many air layers, and has excellent heat retention. Therefore, it has a light and warm feeling and has excellent characteristics, and is widely used for thermal insulation clothes, duvets, thermal blankets, sleeping bags, etc., but the hollow fibers that have been developed so far are pressure imbalance at the top of the spinneret or spun polymers. In the process of cooling the melt, the yarn is opened by the air vortex, or the hollow fiber is opened in repeated use, so that the air layer is lost, so that the resilience, sublimeness, heat retention, and dyeability are poor.

Conventionally, as a method of increasing the hollow ratio of the hollow fiber in the Republic of Korea Patent No. 0062548, the three sides of the ball is in the shape of an arc that is part of the circle (R) of radius R, the detention hole protrudes from the vertex of the three sides Disclosed is a method for producing hollow fibers using spinnerets for the production of triangular cross-section hollow fibers having three protrusions and a gap between each of the three sides of the ball and having a triangular shape of the hole as a whole.

By using a spinneret in which two or more curved slits are arranged in a circular shape, the diameter of the mold, the width of the slits, the length of the curved slits and the slits, the viscosity of the polymer melt, the discharge amount, and the cooling method of the discharge thread are controlled. The method is known, but this method alone could not completely solve the problem of the welding point (falling point) falls.

In order to solve the above problems, Republic of Korea Patent No. 0180825 uses a spinneret having a spinneret in which two or more curved slits in which the edge subgroup of the curved slits are bent toward the hollow part are arranged in a circular or four-leaf clover shape. In addition, a method of manufacturing hollow fibers manufactured by adjusting angles and lengths of curved portions according to the number of curved slits has been developed.

However, although many attempts have been made to increase the hollow rate through the design of curved slits, the problem of falling welding points of the manufactured hollow fibers cannot be completely solved, and because of the swelling characteristic of the polymer during spinning, There is a limitation in manufacturing the hollow fiber of a high porosity, there is a problem that the hollow is broken due to the deformation of the cross section while passing through processes such as post-processing and weaving, knitting, salt processing.

The present invention aims at the hollow fiber which is to prevent the hollow of the hollow fiber is deformed or damaged by post-processing, weaving, salt processing, etc. to provide a usable composite hollow fiber excellent in shape stability of the hollow using a usable polymer. It aims to do it.

It is also an object of the present invention to provide a usable composite hollow fiber which is made of composite fibers having a C-shaped cross section and has a very high hollow ratio when the usable polymer is eluted.

Another object of the present invention is to provide a usable composite hollow fiber using the above-mentioned composite hollow fiber.

In the present invention, the sheath portion is formed of polyester or polyamide synthetic resin, and the core portion is made of a usable polymer, and the core portion is formed so that a part of the core is exposed to the outside. It provides a usable composite hollow fiber, characterized in that formed.

In addition, the water-soluble polymer provides a water-soluble composite hollow fiber, characterized in that the water-soluble polyester synthetic resin.

In addition, the soluble composite hollow fiber provides a soluble composite hollow fiber, characterized in that the hollow ratio after elution of the soluble polymer is 25% or more of the cross-sectional area.

In addition, the composite hollow fiber provides a usable composite hollow fiber, characterized in that formed of spinneret of C type.

In addition, the composite fiber provides a usable composite hollow fiber, which is eluted for 1 to 60 minutes in an aqueous solution of sodium hydroxide (NaOH) 1-5%.

In addition, the present invention provides a water-soluble composite hollow fiber, characterized in that produced by the above-mentioned composite hollow fiber.

In addition, the composite hollow fiber provides usable composite hollow fiber, characterized in that the fineness of 50 ~ 200 denier (Denier), 18 ~ 100 filament.

In addition, the composite hollow fiber provides a composite hollow fiber, characterized in that the partial stretch yarn (POY).

In addition, the composite hollow fiber provides usable composite hollow fiber, characterized in that the drawn yarn (SDY).

In addition, the composite hollow fiber provides usable composite hollow fiber, characterized in that the false twist yarn (DTY).

In addition, the twist number of the twisted yarn provides a usable composite hollow fiber, characterized in that 3000 ~ 3600 (twist / m).

Hereinafter, a preferred embodiment of the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The terms " about "," substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. In addition, the term "yarn" or "thread" used in the present invention means an aggregate of fibers in which two or more fibers are aggregated.

1 is a cross-sectional view showing a cross-section of the usable composite hollow fiber according to the present invention, Figure 2 is a view showing a spinneret capable of producing a usable composite hollow fiber according to the present invention, Figure 3 is a usable composite according to the present invention It is a process chart which shows the manufacturing process of a hollow fiber.

The present invention relates to a soluble composite hollow fiber using a soluble polymer, and as shown in FIG. 1 (a), the sheath part is formed of polyester or polyamide synthetic resin 100, and the core part is made of a soluble polymer 200. Is formed.

As shown in (a) and (b) of FIG. 1, the usable composite hollow fiber is formed so that a part of the core part is exposed to the outside, and is formed of hollow fiber having a C-shaped cross section (FIG. 1 (b)) after elution.

The polyester synthetic resin may be polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT), and the like, and may be used a polyester synthetic resin with added functionality.

The polyamide-based synthetic resin may be used nylon 6, nylon 66, etc., polyamide-based synthetic resin with added functionality may be used.

The usable polymer may be a polymer which can be easily eluted after the fiber is manufactured to be eluted to form a hollow fiber.

It will be preferable to use a water-soluble polyester-based synthetic resin which is easily hydrolyzed to alkali as the water-soluble polymer.

The usable polyester-based synthetic resins are currently used in many fields, and are easily purchased and readily dissolved in alkali.

The usable polyester-based synthetic resin includes terephthalic acid and ethylene glycol as main components, and examples thereof include 5-sodium sulfoisophthalic acid, dimethylsulfonate and / or polyethylene glycol in which 3 to 20 mol% copolymerized with terephthalic acid. .

In addition, ethylene terephthalate (DMT) and 5-sodium sulfo dimethyl isophthalate (DMS) as a main component of the ethylene glycol (EG) and polyalkylene glycols by direct transesterification reaction of the extreme viscosity [n] of polyethylene tere 0.45 or more Soluble polyester-based synthetic resins prepared from phthalate-sodiumsulfo dimethyl isophthalate-polyalkylene glycol copolymers may be used, and compared with terephthalic acid (TPA), ethylene glycol (EG) and terephthalic acid (TPA) and ethylene glycol (EG) It is esterified with dimethylsulfurisophthalate sodium salt (DMSIP) added at a molar ratio of 0.1 to 3.0, and a polyester polyester resin prepared by adding 7.0-14.0 parts by weight of polyethylene glycol to 100 parts by weight of the ester reactant is used during condensation polymerization. Could be.

The water-soluble polyester synthetic resin to be used in the present invention may be any of the water-soluble polyester synthetic resin eluted to alkali other than the above-mentioned water-soluble polyester synthetic resin.

In the usable composite hollow fiber, it is preferable that the hollow is formed to have a hollow ratio of 25% or more of the cross-sectional area after eluting the polymer. If the hollow ratio is less than 25%, the characteristics of the hollow fiber may be reduced due to the deformation of the hollow form in post-processing and the like after the eluted polymer is eluted.

The usable composite hollow fiber may be made of an eccentric sheath-core composite fiber formed so that the synthetic resin of the core is exposed to the outside in the sheath-core composite fiber to form a hollow fiber having a C-type cross section after eluting.

However, since the eccentric sheath-core composite fiber can prevent the synthetic resin of the sheath portion from being exposed to the outside due to swelling of the synthetic resin of the sheath during spinning, it is manufactured using a C-shaped spinneret as shown in FIG. It would be desirable to.

When the C-type spinneret is manufactured, the polyester-based or polyamide-based synthetic resin is discharged from the hole of A, and the usable polymer is released from the hole of B. As shown in FIG. Can be prepared.

The sheath-core composite fiber made of C-type spinneret as described above is easily exposed to the elution solution when the synthetic resin of the core part is easily exposed to the outside, and easily melts the usable polymer.

When the soluble polymer is used as a soluble polyester-based synthetic resin, the composite fiber may be eluted in an aqueous sodium hydroxide (NaOH) solution.

In the aqueous solution of less than 1% of sodium hydroxide, the elution time takes a long time when eluting the soluble polyester-based synthetic resin, and in case of eluting in an aqueous solution of more than 5% of sodium hydroxide, the sheath polyester may be eluted. It would be desirable to elute in 1-5% aqueous solution.

When eluting in the sodium hydroxide (NaOH) aqueous solution, the dissolution time may vary depending on the concentration of the sodium hydroxide aqueous solution, but it will be preferable to elute for 1 to 60 minutes.

As described above, the usable composite hollow fiber can be manufactured using the usable composite hollow fiber according to the present invention.

The usable composite hollow fiber is preferably made of fineness 50 ~ 200 denier (Denier), 18 ~ 100 filament for ease of use.

The usable composite hollow fiber is manufactured by a general fiber and yarn manufacturing process for spinning a plurality of fibers at the same time using a spinning device in which a plurality of spinnerets are formed and forming the spun fibers into yarns. It is to manufacture hollow fiber.

As described above, the usable composite hollow fiber according to the present invention is a melting step of melting a polyester synthetic resin or polyamide-based synthetic resin and a core-soluble polyester synthetic resin of the sheath part as shown in FIG. 3, and the synthetic resins as a composite fiber. It can be prepared by the spinning compound spinning step.

The melting step is a preparation step of the composite spinning step of melting at 285 ~ 295 ℃ for the polyester synthetic resin or 245 ~ 265 ℃ in the case of polyamide synthetic resin, and melted at 265 ~ 280 ℃ usable polyester synthetic resin .

In the composite spinning step, the molten polyester-based or polyamide-based synthetic resin is formed as a sheath portion, and the usable polyester is formed as a core portion and spun at 270 to 285 ° C., followed by elution of the usable polymer so as to form hollow fibers of a C-type cross section. The core portion should be formed so that a portion thereof is exposed to the outside. The method of externally exposing the core part may use the C-type spinneret described above.

After the composite spinning step, the yarn to be produced may include a step of producing a partially drawn yarn (POY) or a drawn yarn (SDY) according to the type of yarn to be manufactured. It will be possible.

After the composite spinning step, the partially drawn yarn (POY) manufacturing step may be further included, wherein the partially drawn yarn (POY) manufacturing step is wound the fiber to be spun at 2500 ~ 3200mpm (m / min) to the usable composite hollow fiber Can be produced by partially drawn yarns (POY).

After the composite spinning step, the stretched yarn (SDY) manufacturing step may be further included, the stretched yarn (SDY) manufacturing step is the first winding and 2800 ~ 4200mpm winding the spinning fiber at 1000 ~ 1700mpm (m / min) The usable composite hollow fiber can be manufactured as a stretched yarn (SDY) by stretching the usable composite hollow fiber with the second winding wound at (m / min).

Winding in the partially drawn yarn and the drawn yarn (SDY) manufacturing step it will be preferable to wind the composite hollow fiber using a Got roller (Godet roller, G / R).

In the case of the first winding and the second winding using the roller in the SDY manufacturing step, the surface temperature of the roller is 70 to 90 ° C. in the first winding, and 100 to 130 ° C. in the second winding. It should be kept and wound up to prevent trimming during stretching.

In addition, after the production of the usable hollow fiber as the partially drawn yarn or drawn yarn, it may further comprise a false twist yarn manufacturing step of producing a false twist yarn (DTY).

The false twisted yarn manufacturing step is the partially drawn yarn or the drawn yarn in the step of twisting the partially drawn yarn or drawn yarn 400 to 600m / min, the number of twists of 3000 ~ 3600 TM (twist / m) and heat setting of 150 ~ 180 ℃ The prepared usable composite hollow fiber can be manufactured with false twisted yarn.

In addition, the usable composite hollow fiber according to the present invention may be produced by various kinds of yarns (絲, Yarn) in a variety of yarn processing other than the above partially drawn yarn, drawn yarn, false twisted yarn.

As described above, the usable composite hollow fiber according to the present invention is to produce a fiber that can maintain a high hollow shape by dissolving the usable polymer in alkali immediately after the dyeing process, after all the post-treatment processes such as false twisted yarn and fabric formation fixing are completed. Can be.

As described above, the usable composite hollow fiber according to the present invention uses an soluble polymer, and thus, hollow yarns are not formed during yarn processing such as false twisted yarn, so that the yarn processing can be effectively performed.

In addition, the hollow fiber is not deformed by forming the fiber or fabric of the fabric or knitted fabric and eluting the usable polymer before the dyeing process, thereby providing a hollow fiber having a high porosity.

In addition, the hollow polymer can be easily formed by smoothly dissolving the usable polymer into the cis-core composite hollow fiber in which the usable polymer of the core part is exposed to the outside.

1 is a cross-sectional view showing a cross-section of the usable composite hollow fiber according to the present invention.
Figure 2 is a view showing a spinneret capable of producing a usable composite hollow fiber according to the present invention.
3 is a process chart showing a manufacturing process of the usable composite hollow fiber according to the present invention.

Hereinafter, examples of the method for producing the usable composite hollow fiber and the composite hollow fiber of the present invention are shown, but are not limited thereto.

Example

1. Manufacturing of usable composite hollow fiber and composite hollow fiber

The polyester-based synthetic resin used in the sheath part was made of polyethylene terephthalate, and the polyamide-based synthetic resin was made of nylon 6.

The usable polymer of the core part consists of dimethyl terephthalate (DMT) and 5-sodium sulfo dimethyl isophthalate (DMS) as a main component, and polyethylene terephthalate-sodium sulfo dimethyl formed by direct transesterification of ethylene glycol (EG) and polyalkylene glycol. A water-soluble polyester synthetic resin prepared from an isophthalate-polyalkylene glycol copolymer was used.

The sheath part is made of polyester synthetic resin and the core part is made of a usable polymer. The composite hollow fiber is made of partially drawn and drawn yarn under the spinning conditions shown in Table 1, and the sheath part is made of polyamide synthetic resin and the core part is made of a usable polymer. Composite hollow fiber was prepared in the partially drawn yarn (POY) and drawn yarn (SDY) under the spinning conditions of Table 2.

In addition, using the partially drawn yarn was made of twisted yarn and twisted yarn (DTY) was prepared by the twisting speed of 500m / min, 3300 ~ 3500 TM (twist / m) Z twist and heat setting of 160 ~ 165 ℃.

Fiber form Radiation temperature G / R1 speed G / R1 temperature G / R2 speed G / R2 temperature POY 280 2930 - 3030 - SDY 280 1500 90 4400 125

Fiber form Radiation temperature G / R1 speed G / R1 temperature G / R2 speed G / R2 temperature POY 275 2550 - 2600 - SDY 275 1200 80 4000 120

2. Properties of usability composite hollow fiber

Eight types of radiation conditions in Table 1 (POY 80/36, POY 125/36, POY 130/36, POY 175/36, SDY 75/36, DTY 50/36, DTY 75/36, DTY 100/72) ), The composite hollow fiber was prepared, and the strength and elongation properties of each yarn were measured and shown in Table 3.

kind The island (de ') Strength (g / de) Shinto (%) POY 80/36 80 2.5 130 POY 125/36 125 2.1 130 POY 130/36 130 2.2 130 POY 175/36 175 2.2 135 SDY 75/36 75 4.2 30 DTY 50/36 50 4.3 25 DTY 75/36 75 3.7 27 DTY 100/72 100 4.2 27

A total of two types (POY 120/36, DTY 75/36) of the usable composite hollow fiber were prepared under the spinning conditions of Table 2, and the strength and elongation properties of each yarn were measured and shown in Table 4.

kind The island (de ') Strength (g / de) Shinto (%) POY 120/36 120 3.1 140 DTY 75/36 75 4.7 40

As shown in Tables 3 and 4, the usable composite yarn using the usable composite hollow fiber according to the present invention can be seen that the strength, elongation is suitable for clothing.

3. Dissolution test of soluble composite hollow fiber

POL 80/36 and DTY 75/36 SDY 75/36 prepared above-mentioned composite hollow fiber (cisbu-polyester-based synthetic resin) were eluted at 100 ° C. for 10 to 30 minutes in a 2% aqueous sodium hydroxide solution, and then eluted and eluted. Sex was evaluated.

division POY 80/36 DTY 75/36 SDY 75/36 Before dissolution

After elution

As shown in Table 5, it can be seen that the partially drawn yarns (POY) and drawn yarns (SDY), which are yarns produced in the spinning step, are round and uniform in cross-sectional shape. It was confirmed that deformation of cross section occurs at the time of manufacturing with false twisted yarn (DTY), but hollow is maintained.

In addition, the stretched yarn (SDY) fully oriented in the spinning process can be seen the deformation of the cross-section both before and after elution. The hollow ratio according to the elution was determined to be 25 to 35% based on the cross-sectional area.

Claims (11)

Sheath (Sheath) is formed of a polyester or polyamide synthetic resin, the core (Core) is formed of a usable polymer,
The core part is formed to be exposed to the outside is available composite hollow fiber, characterized in that formed after the hollow fiber of the C-type cross-section. The method of claim 1,
The usable polymer is a usable composite hollow fiber, characterized in that the usable polyester-based synthetic resin. The method of claim 1,
The usable composite hollow fiber is a composite hollow fiber characterized in that the hollow ratio after elution of the polymer is 25% or more of the cross-sectional area. The method of claim 1,
The composite hollow fiber is a usable composite hollow fiber, characterized in that formed of spinnerets of the C type. 3. The method of claim 2,
The composite hollow fiber is a usable composite hollow fiber, characterized in that eluted for 1 to 60 minutes in 1-5% aqueous sodium hydroxide (NaOH). The composite hollow fiber of claim 1 to 5, which is made of the composite hollow fiber of the present invention. The method according to claim 6,
The composite hollow fiber is a usable composite hollow fiber, characterized in that the fineness of 50 ~ 200 denier (Denier), 18 ~ 100 filament. The method according to claim 6,
The composite hollow fiber is a composite hollow fiber, characterized in that the partially drawn yarn (POY) The method according to claim 6,
The composite hollow fiber is a usable composite hollow fiber, characterized in that the stretching yarn (SDY). The method according to claim 6,
The composite hollow fiber is a fusible yarn (DTY), characterized in that the usable composite hollow fiber. The method of claim 10,
The twisted number of twisted yarn is yong composite hollow fiber, characterized in that 3000 ~ 3600TM (twist / m).

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