KR101484506B1 - Soluble conjugated hollow fiber and hollow yarn - Google Patents

Abstract

The present invention relates to a usable composite hollow fiber and a composite hollow construction, wherein the sheath portion is formed of a polyester-based or polyamide-based synthetic resin, the core portion is formed of a usable polymer, The present invention relates to a usable composite hollow fiber and a composite hollow structure which are formed as hollow fibers having a C-shaped cross-section after being eluted and have excellent hollowness without any change in shape of hollow.

Description

{SOLUBLE CONJUGATED HOLLOW FIBER AND HOLLOW YARN}

The present invention relates to a usable composite hollow fiber and a composite hollow construction. More particularly, the present invention relates to a usable composite hollow fiber and a composite hollow construction excellent in hollow ratio without any change in shape of a hollow formed in the fiber.

BACKGROUND ART 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 monofilament fineness, and there are drawbacks in that they are different from natural fibers such as hemp, cotton and the like in terms of warmth, and in order to improve such drawbacks, .

Generally, a hollow fiber having a high hollow ratio has a small specific gravity and excellent thermal insulation because a fiber having a high hollow ratio contains many air layers. Therefore, it has been widely used for heat insulation clothes, quilts, thermal insulation quilts, sleeping bags, etc. However, the hollow fibers that have been developed so far have problems such as pressure imbalance in the radiation hole at the time of spinning, There is a drawback that the yarn is opened by the air vortex in the process of cooling the molten material or the hollow yarn is opened when the yarn is repeatedly used and the air layer is lost, so that the repulsive property, the nobility, the warmth and the dyability are poor.

Conventionally, as a method of increasing the hollow ratio of the hollow fibers, Korean Patent Registration No. 0062548 discloses that the three sides of the holding hole are formed in an arc shape, which is a part of a circle having a radius R, Discloses a method for producing a hollow fiber by using a spinneret for producing a triangular hollow fiber having three protrusions and having a gap between each of the spinnerets of the three sides and having a triangular shape as a whole.

By using a spinneret in which two or more curved slits are arranged in a circular shape, the diameter of the spinneret, the slit width, the length between the curved slits and the slit, the viscosity of the polymer melt, the discharge amount, However, such a method alone can not completely solve the problem that the welding point is lowered.

In order to solve the above problems, Korean Patent Registration No. 0180825 discloses a spinneret having a spinneret having two or more curved slits curved toward the hollow portion of the curved slit and having a circular or four-leaf clover shape And a method of manufacturing a hollow fiber produced by adjusting the angle and length of the bent portion according to the number of curved slits.

However, it has been attempted to increase the hollow rate through the design of the curved slit, but the problem of the welding point of the hollow fiber being manufactured can not be completely solved. Due to the polymer-specific swelling phenomenon during spinning, There is a limit in manufacturing a high strength hollow fiber and there is a problem that the hollow is broken due to the shape deformation of the cross section while passing through processes such as post-processing and weaving, knitting, and salt processing.

The present invention aims to provide a hollow fiber which is prevented from being deformed or damaged by post-processing, weaving, salt processing or the like of the hollow fiber as described above, in which a usable composite hollow fiber excellent in hollow shape stability is provided .

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.

It is also an object of the present invention to provide a usable composite hollow structure using the above-described usable composite hollow fibers.

In the present invention, the sheath portion is formed of a polyester-based or polyamide-based synthetic resin, and the core portion is formed of a usable polymer. The core portion is formed to be partially exposed to the outside, The present invention also provides a useable composite hollow fiber comprising the same.

Also, the usable composite hollow fiber is characterized in that the usable polymer is a usable polyester synthetic resin.

Also, the usable composite hollow fiber is characterized in that the hollow fiber has a hollow ratio of 25% or more of the cross-sectional area after eluting the usable polymer.

The present invention also provides a usable composite hollow fiber characterized in that the composite hollow fiber is formed of a C type spinneret.

In addition, the conjugate fiber is eluted from 1 to 5% aqueous solution of sodium hydroxide (NaOH) for 1 to 60 minutes.

Further, the present invention provides a usable composite hollow structure, which is manufactured from the usable composite hollow fibers.

In addition, the composite joint construction is characterized in that the fineness is 50 to 200 denier and 18 to 100 filament.

In addition, the present invention provides a composite joint construction characterized in that the composite joint construction is a partially expanded joint (POY).

Further, the present invention provides a multi-use composite construction, wherein the multi-joint construction is a drawing machine (SDY).

Further, the present invention provides a multi-use composite construction wherein the multi-joint construction is a false twist yarn (DTY).

Also, the twist of the false-twist yarn is 3000 to 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, 'yarn' or 'yarn' used in the present invention means an aggregate of fibers in which two or more fibers are gathered.

FIG. 1 is a cross-sectional view showing a cross section of a usable composite hollow fiber according to the present invention, FIG. 2 is a view showing a spinneret capable of producing a usable composite hollow fiber according to the present invention, and FIG. And a process for producing a hollow fiber.

The present invention relates to a usable composite hollow fiber using a usable polymer. As shown in Fig. 1 (a), a sheath portion is formed of a polyester or polyamide synthetic resin 100, and a core portion is formed of a usable polymer 200 .

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

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

As the polyamide-based synthetic resin, nylon 6, nylon 66, or the like may be used, and a polyamide-based synthetic resin having added functionality may be used.

It may be desirable to use a polymer that can be readily eluted after the fiber is eluted and the fibers are formed into hollow fibers.

It is preferable that the usable polymer is a usable polyester-based synthetic resin which is easily hydrolyzed to an alkali.

The usable polyester-based synthetic resin is used in many fields today, and is easy to purchase and has an advantage of being easily dissolved in alkali.

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

In addition, ethylene glycol (EG) and polyalkylene glycol are directly transesterified with dimethyl terephthalate (DMT) and 5-sodium sulfodimethyl isophthalate (DMS) as main components and polyethylene terephthalate having an intrinsic viscosity [n] (TPA), ethylene glycol (EG), terephthalic acid (TPA), ethylene glycol (EG), and the like can be used as the thermoplastic resin The esterification reaction is carried out with dimethylsulfur isophthalate sodium salt (DMSIP) added at a molar ratio of 0.1 to 3.0, and 7.0 to 14.0 parts by weight of polyethylene glycol is added to 100 parts by weight of the ester reactant at the time of condensation polymerization to obtain a usable polyester synthetic resin It will be possible.

The usable polyester-based synthetic resin to be used in the present invention may be any of usable polyester-based synthetic resins eluted in alkali in addition to the usable polyester-based synthetic resin as described above.

It is preferable that the usable composite hollow fibers have a void of 25% or more of the cross-sectional area after the utilization polymer is eluted. If the hollow ratio is less than 25%, the characteristics of the hollow fiber may be deteriorated due to the deformation of the hollow shape after the elution of the usable polymer.

The usable composite hollow fiber may be made of an eccentric cis-core conjugate fiber in which a synthetic resin of the core is exposed to the outside in a cis-core type conjugate fiber for forming a C-shaped cross-section hollow fiber after elution.

However, since the eccentric sheath-core type conjugate fiber can prevent the synthetic resin of the core portion from being exposed to the outside due to the swelling phenomenon of the synthetic resin in the sheath during the spinning, the cantilever- .

In the case of the C-type spinneret, the polyester-based or polyamide-based synthetic resin is discharged from the hole of A and the usable polymer is discharged from the hole of B to form the cis-core type composite hollow fiber Can be produced.

As described above, the cis-core type conjugate fiber produced by the spinneret of the C type can easily be exposed to the eluting solution when the synthetic resin of the core part is easily exposed to the outside and the synthetic resin of the core part is eluted.

When the usable polymer is used as a usable polyester synthetic resin, it is preferable that the conjugated fiber is eluted from an aqueous solution of sodium hydroxide (NaOH).

When the usable polyester synthetic resin is eluted in an aqueous solution of less than 1% sodium hydroxide, elution time is long, and when eluting in an aqueous solution exceeding 5% sodium hydroxide, the polyester of the sheath can be eluted. Therefore, sodium hydroxide It may be preferable to elute it in an aqueous solution of 1 to 5%.

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

As described above, the usable composite hollow fiber according to the present invention can be used to produce a usable composite hollow work.

For the convenience of use, it is preferable that the usable composite construction is made of fineness of 50 ~ 200 deniers and 18 ~ 100 filaments.

The above-mentioned usable composite fabrics are manufactured by a general fiber and yarn manufacturing process in which a plurality of fibers are simultaneously radiated by using a spinning device in which a plurality of spinnerets are formed, and spinning fibers are formed into yarns. Thereby producing a hollow fiber.

As described above, the usable composite hollow fiber according to the present invention comprises a melting step of melting the polyester-based synthetic resin or polyamide-based synthetic resin of the sheath portion and the usable polyester-based synthetic resin of the core portion as shown in FIG. 3, Lt; RTI ID = 0.0 > spinning < / RTI >

The melting step is a preparation step of a composite spinning step in which the polyester-based synthetic resin is melted at 285 to 295 ° C or the polyamide-based synthetic resin is melted at 245 to 265 ° C, and the usable polyester-based synthetic resin is melted at 265 to 280 ° C .

In the composite spinning step, the molten polyester-based or polyamide-based synthetic resin is formed into a cis portion and the usable polyester is formed into a core portion and spun at 270 to 285 ° C. The core portion should be formed so that a part thereof is exposed to the outside. The external exposure method of the core portion 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.

(POY) manufacturing step may be further included after the composite spinning step. In the partial spinning (POY) manufacturing step, the spinning fiber is wound at 2500 to 3200 mpm (m / min) (POY). ≪ / RTI >

(SDY) may be further included after the composite spinning step. The step of preparing the drawn yarn (SDY) may include a first spinning operation for spinning the spinning fiber at 1000 to 1700 mpm (m / min) and a spinning operation at 2800 to 4200 mpm (SDY) can be manufactured by stretching the second winding furnace composite hollow core work which is wound up at a high speed (m / min).

The winding in the step of producing the partially drawn yarn and the drawn yarn (SDY) may be preferably carried out by using a Godet roller (G / R).

The surface temperature of the godet roller is set to 70 to 90 DEG C in the first winding and 100 to 130 DEG C in the second winding in the case of performing the first winding and the second winding using the godet roller in the step of manufacturing the drawn yarn (SDY) It may be possible to prevent filing phenomenon occurring during stretching.

Further, the partially drawn yarn or the drawn yarn may be further made into a usable hollow fiber and then a false-twist yarn manufacturing step of producing a false-twist yarn (DTY).

The step of manufacturing the false-twist yarn is a step of heat-setting the partially drawn yarn or the drawn yarn at a speed of 400 to 600 m / min, a twist number of 3000 to 3600 TM (twist / m), and a temperature of 150 to 180 ° C. The produced usable composite joint construction can be manufactured as a false twist yarn.

In addition, the usable composite hollow fibers according to the present invention may be manufactured from various yarns other than the above partially drawn yarn, drawn yarn, and false twist yarn into various kinds of yarns.

As described above, in the usable composite construction according to the present invention, a fiber capable of maintaining a high hollow shape is manufactured by dissolving a usable polymer in an alkali immediately before a dyeing process after a post-treatment process such as a false twist yarn, .

As described above, the usable composite hollow fiber according to the present invention uses a usable polymer, and thus hollow is not formed at the time of yarn processing of false yarn or the like, so that yarn processing can be effectively performed.

In addition, after the quartz process, the fabric is formed into a fabric or knitted fabric, and the usable polymer is eluted before the dyeing process to produce a hollow fiber, so that the hollow fiber is not deformed.

In addition, there is an effect that the usable polymer is smoothly eluted with the sheath-core type composite hollow fiber in which the usable polymer in the core portion is exposed to the outside, and the hollow is easily formed.

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

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

Example

1. Utilization of composite hollow fiber and composite hollow construction

Polyester terephthalate was used for the polyester synthetic resin used for the sheath, and nylon 6 was used for the polyamide synthetic resin.

The usable polymer in the core part is polyethylene terephthalate-sodium sulfodimethyl (DMT), which is composed mainly of dimethyl terephthalate (DMT) and 5-sodium sulfodimethyl isophthalate (DMS) and has ethylene glycol A usable polyester-based synthetic resin made of an isophthalate-polyalkylene glycol copolymer was used.

The sheath was made of a polyamide-based synthetic resin and the core part was made of a usable polymer by using a usable polymer. The sheath was made of a polyester-based synthetic resin and the core part was made of a usable polymer. The composite hollow fibers were produced by partially spinning (POY) and drawn (SDY) yarns under the spinning conditions in Table 2.

The twist yarn (DTY) was manufactured by twisting the yarn at a speed of 500 m / min, twisting the yarn at 3300 to 3500 (twist / m), and thermally fixing at 160 to 165 ° C.

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

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 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 utilization composite joint construction were manufactured under the spinning condition 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 to have strength and elongation suitable for clothing.

3. Dissolution experiment of usability complex construction

The hollow composite resin construction (sheath-polyester synthetic resin) of POY 80/36 and DTY 75/36 SDY 75/36 prepared above was eluted at a temperature of 100 ° C for 10 to 30 minutes in an aqueous solution of 2% sodium hydroxide for a hollow rate and elution The sex was evaluated.

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

After elution

As shown in Table 5, it can be seen that the shape of the cross section is uniform and circular in the partly drawn yarn (POY) and the drawn yarn (SDY), which are originated from the radiation stage. It was confirmed that the cross section was deformed at the time of manufacture by DTY but kept hollow.

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

Claims (11)

The sheath portion is formed of a polyester or polyamide synthetic resin. The core portion is composed of terephthalic acid and ethylene glycol in which 5-sodium sulfoisophthalic acid, dimethylsulfonate, and polyethylene glycol are copolymerized with 3 to 20% by mole of terephthalic acid (EG) and a polyalkylene glycol are directly transesterified with dimethyl terephthalate (DMT) and 5-sodium sulfodimethyl isophthalate (DMS) to obtain polyethylene terephthalate (PTFE) having an intrinsic viscosity [n] of 0.45 or more (TPA), dimethyl sulphate (EG), terephthalic acid (TPA) and ethylene glycol (EG) added in an amount of 0.1 to 3.0 molar ratio relative to the total amount of the polyether sulfone Isomerized with isophthalate sodium salt (DMSIP) and, during the condensation polymerization, added to 100 parts by weight of the ester reactant, And 7.0 to 14.0 parts by weight of polyethylene glycol to form a usable polymer which is a copolymerized polyester,
Wherein the core part is formed so as to be partially exposed to the outside and is formed into a C-shaped cross-section hollow fiber after being eluted. delete The method according to claim 1,
Wherein the usable composite hollow fiber has a hollow ratio of 25% or more of a cross-sectional area after eluting the usable polymer. The method according to claim 1,
Wherein the composite hollow fiber is formed of a C type spinneret. The method according to claim 1,
Wherein the composite hollow fiber is eluted from 1 to 5% aqueous solution of sodium hydroxide (NaOH) for 1 to 60 minutes. The composite hollow fiber construction according to any one of claims 1, 3, 4, and 5, which is made of the usable composite hollow fiber. The method according to claim 6,
Wherein the composite joint construction is made of a finite element having a fineness of 50 to 200 denier and an 18 to 100 filament. The method according to claim 6,
Wherein the composite joint construction is a partially expanded joint (POY) The method according to claim 6,
Wherein the composite joint construction is a soft joint construction (SDY). The method according to claim 6,
Wherein the composite joint construction is a false twist yarn (DTY). 11. The method of claim 10,
Wherein the twist of the false twist yarn is 3000 to 3600 (twist / m).

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