KR20160129992A

KR20160129992A - Extraction type conjugated hollow fiber and hollow yarn

Info

Publication number: KR20160129992A
Application number: KR1020150061554A
Authority: KR
Inventors: 김현선; 홍성진; 강병호; 김우진
Original assignee: 주식회사 휴비스
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2016-11-10

Abstract

The present invention relates to a leaching type composite hollow fiber and a composite hollow construction, wherein the sheath portion is formed of a nylon resin and the core portion is formed of a usable polymer wherein a part of the core portion is exposed to the outside, And the sheath portion is made of a C-shaped cross-section.

Description

EXTRACTION TYPE CONJUGATED HOLLOW FIBER AND HOLLOW YARN}

The present invention relates to a leaching type composite hollow fiber and a composite hollow construction, and more particularly, to a leaching type composite hollow fiber and a composite hollow structure excellent in hollow ratio without any change in shape of 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, fibers with a high hollow ratio contain a lot of air layers, so they have a small specific gravity and excellent thermal insulation. 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 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, and the holding hole is protruded from the vertex of the three sides A hollow fiber is produced 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 a shape of the spinneret as a whole being triangular.

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 the case of the elution type hollow fiber, it was essential to completely dissolve and discharge the internal material, and maintain the cross-sectional shape in the discharge. Further, it has been desired to develop a fiber technology that has excellent warmth and light weight even after being eluted.

In order to solve the above problems, it is an object of the present invention to provide a leaching type composite core work which is excellent in not only the strength of the yarn but also the retention ratio of the cross-sectional shape.

Another object of the present invention is to provide a composite hollow structure excellent in thermal insulation and lightweight effect after removal of the usable polymer.

In order to achieve the above object, the present invention provides a composite hollow fiber, wherein the sheath portion is formed of a nylon resin, the core portion is formed of a usable polymer wherein a part of the core portion is exposed to the outside, And the sheath portion has a C-shaped cross-section.

Also, the nylon resin of the present invention has a relative viscosity (RV) of 3.0 to 3.5.

In addition, the usable polymer of the present invention may be composed of a polyester resin containing 5 to 5 mol% of 5-sodium sulfoisophthalic acid with respect to terephthalic acid or a derivative thereof , which is made of copolymerized polyethylene terephthalate (PET) , Wherein the resin composition comprises 90 to 95% by weight of the polyester resin and 5 to 10% by weight of a water-soluble polyalkylene oxide having a number average molecular weight of 400 to 20,000 do.

Also, the elution type composite hollow fiber of the present invention is characterized in that the elution type composite hollow fiber has a hollow ratio of 45% to 55% of the total cross-sectional area after eluting the usable polymer.

Further, the present invention provides a leaching type composite hollow structure produced by using the composite hollow fibers.

Also, the composite joint construction of the present invention is characterized by a fineness of 50 to 200 deniers and 24 to 72 filaments.

Further, the composite joint construction according to the present invention is characterized in that the composite joint construction is any one of a partially stretched yarn (POY), a drawn yarn (SDY), and a false twist yarn (DTY).

The elution type composite hollow fiber and composite hollow structure according to the present invention not only has excellent strength of the yarn but also has a retention ratio of the sectional shape of 98% or more.

Also, the elution type composite hollow fiber and composite hollow structure according to the present invention has an excellent thermal insulation and light weight after removing the usable polymer.

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.

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, and FIG. 2 is a view showing a spinneret capable of producing a usable composite hollow fiber according to the present invention.

As shown in FIG. 1, the present invention relates to a dissolvable composite hollow fiber comprising a sheath portion and a core portion in the form of a C-shaped cross section, the sheath portion being formed of a nylon resin, Polymer.

The elution type composite hollow fiber may be formed of a hollow fiber having a C-shaped cross section after a portion of the core portion is exposed to the outside and the core portion is eluted.

As the nylon resin used for the sheath, nylon 6 or nylon 66 may be used, and the relative viscosity of the nylon resin is preferably 3.0 to 3.5. When the relative viscosity (RV) is in the range of 3.0 to 3.5, excellent cross-sectional shape retention and excellent warming property are obtained. That is, when the relative viscosity (RV) is less than 3.0, the cross-sectional shape capable of maintaining the C-shaped cross-section is not maintained well, and when the RV is more than 3.5, the viscosity is high and the spinning is not performed well.

In the composite hollow fiber of the present invention, the usable polymer used in the core part is prepared by eluting the core part after the production of the fiber to produce a hollow fiber. The usable polymer is used so that it can be easily eluted. The usable polymer is preferably a usable polyester-based synthetic resin which is easily hydrolyzed into an alkaline solution.

The usable polyester-based synthetic resin is currently used in many fields and has an advantage of being easily dissolved in an alkaline solution.

As the usable polyester synthetic resin, a copolymerized polyethylene terephthalate (PET) can be used.

The copolymerized polyethylene terephthalate (PET) may be composed of a polyester resin containing 5 to 5 mol% of 5-sodium sulfoisophthalic acid with respect to terephthalic acid or a derivative thereof, And 5 to 10% by weight of a water-soluble polyalkylene oxide having a number average molecular weight of 400 to 20,000.

The core is made relatively low in copolymerization to produce polyester, and the viscosity of the nylon resin of the sheath is kept relatively high, so that the shape of the yarn can be maintained well.

The elution type composite hollow fiber preferably has a hollow ratio of 45% or more of the total cross-sectional area after eluting the usable polymer, more preferably 45 to 55%.

When the hollow ratio is in the above range, excellent retention of the cross-sectional shape of the fiber is achieved, and also maintaining the warmth is excellent.

The present invention also provides an eccentric sheath-core composite in which the releasable composite hollow fibers are formed so that the usable polymer resin of the core portion is exposed to the outside in the cis-core type conjugate fiber for forming the hollow fibers of the C- Fiber.

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 of the sheath portion during spinning. Therefore, the cantilever- can do.

In the case of the C-type spinneret, the nylon resin emits nylon resin into the hole of (1), and the usable polymer is released from the hole of (2) to produce a c-core type composite hollow fiber of C- have.

In the sheath-core type conjugate fiber produced by the spinneret type C, part of the usable polymer in the core part is easily exposed to the outside, and the resin of the core part is brought into contact with the eluting solution and can be easily eluted.

When the usable polymer is used as a usable polyester synthetic resin, it is preferable to elute the elution-type conjugated fiber 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 is preferable to elute the solution in an aqueous solution of 1 to 5%.

In the case of elution in the aqueous solution of sodium hydroxide (NaOH), the elution time may vary depending on the concentration of the aqueous sodium hydroxide solution, but it is preferably eluted for 10 to 60 minutes.

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

For the convenience of use, the usable composite construction is preferably made of a filament having a fineness of 50 to 200 deniers and a filament of 24 to 72 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 can be produced by melting the nylon resin in the sheath portion and the usable polyester synthetic resin in the core portion, followed by composite spinning.

The nylon resin in the sheath portion melts at 240 to 260 ° C in melting state, and the usable polyester synthetic resin melts at 260 to 280 ° C.

In order to carry out the composite spinning after melting, the molten nylon resin is formed into a core part by the use of a cis portion and spinnable at 270 to 285 DEG C so that a part of the core part is formed on the outside To be exposed. The C-shaped spinneret described above can be used for the external exposure of the core portion.

After the composite spinning, the yarn to be produced may be used either as a partially drawn yarn (POY), a drawn yarn (SDY), or a false twist yarn (DTY), depending on the type.

The POY can be produced by winding the spinning fiber at 2500 to 3200 mpm (m / min) to produce the POY.

In addition, the manufacture of the drawn yarn (SDY) is carried out by a combination of the first spinning in which the spinning fiber is spinned at 1000 to 1700mpm (m / min) and the second spinning spinning at 2800 to 4200mpm (m / min) The hollow fiber can be stretched so that the usable composite hollow fiber can be manufactured as a drawn yarn (SDY).

It is preferable that the composite yarn is wound using a Godet roller (G / R) when winding the partially drawn yarn and the drawn yarn (SDY).

The surface temperature of the godet roller is maintained at 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 manufacture of the drawn yarn (SDY) It is necessary to take up the steel sheet to prevent the filing phenomenon occurring during the stretching.

Further, after the hollow yarn is produced from the partially drawn yarn or drawn yarn, the yarn can be produced as a false twist yarn (DTY). (DTY) is a step of heat-setting the partially drawn or drawn yarn at a speed of 400 to 600 m / min, a twist number of 3000 to 3600 (twist / m) and a temperature of 150 to 180 ° C, The usable composite joint work manufactured from a drawn yarn 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, the elution type compound hollow core according to the present invention can be produced by dissolving the usable polymer in an alkali immediately before the dyeing process after the post-treatment such as the false twist yarn and fixing and fixing of the fabric are completed, .

Hereinafter, embodiments of the present invention will be described in detail.

Example 1

Nylon 6 was used as the cistern in the preparation of the composite fiber, and the resin was used with a relative viscosity of 3.0.

A usable polymer was used as a core part, and a copolymerized polyethylene terephthalate (PET) was used.

That is, it is produced by polymerizing terephthalic acid or a derivative thereof with a diol compound

90 to 95% by weight of a polyester resin, a polyester resin or a mixture thereof containing 2 to 5 mol% of 5-sodium sulfoisophthalic acid or a derivative thereof relative to terephthalic acid or a derivative thereof and a polyester resin having a number average molecular weight of 400 To 20,000 by weight of a water-soluble polyalkylene oxide having 5 to 10% by weight

The production of the copolymerized polyethylene terephthalate (PET) was carried out using a polyester copolymerized with terephthalic acid, ethylene glycol, dimethylsulfonate and polyethylene glycol in an amount of 21 to 25 mol% based on terephthalic acid.

Composite hollow fibers were fabricated by using sheath and core parts, and partially drawn yarn (POY) was fabricated on the basis of this.

Examples 2 to 6

The procedure of Example 1 was repeated,

(Example 2), 80 denier / 36 filament (Example 3), 125 denier / 36 filament (Example 4), 135 denier / 36 filament Filament (Example 5), and 135 denier / 72 filament (Example 6), respectively.

Examples 7 and 8

The procedure of Example 1 was repeated,

Nylon 6 with a relative viscosity of 3.5 was used,

(POE) of the composite hollow fibers was 50 denier / 36 filament (Example 7) and 85 denier / 72 filament (Example 8).

Examples 9 and 10

Composite hollow fibers were prepared in the same manner as in Example 1,

(SDY) was produced by using the same, and each composite core was manufactured using 75 denier / 36 filament (Example 9) and 75 denier / 72 filament (Example 10).

Example 11

The procedure of Example 1 was repeated,

Nylon 6 with a relative viscosity of 3.5 was used,

(SDY) was produced by using this, and a composite core construction was manufactured with 50 denier / 36 filament.

Examples 12 to 14

Composite hollow fibers were prepared in the same manner as in Example 1,

(DTY) was produced by using the same as Example 1 except that 50 denier / 36 filaments (Example 12), 50 denier / 48 filaments (Example 13) and 75 denier / 36 filaments (Example 14) Construction work.

Example 15

The procedure of Example 1 was repeated,

Nylon 6 with a relative viscosity of 3.5 was used,

(DTY) was produced by using this, and a composite core construction was manufactured with 75 denier / 72 filament.

Comparative Example 1

C type composite hollow fiber,

A polybutylene terephthalate (PBT) resin was used as a sheath, and a polyethylene terephthalate (PET) resin was used as a core part.

Comparative Example 2

The procedure of Example 1 was repeated,

And the relative viscosity of nylon 6 in the sheath was adjusted to 2.8 to prepare a composite hollow fiber.

Comparative Example 3

The procedure of Example 1 was repeated,

And the relative viscosity of nylon 6 in the sheath was set to 2.5 to prepare a composite hollow fiber.

The physical properties of the composite construction of Examples and Comparative Examples are shown in Table 1 below.

kind Shebu
Relative viscosity burglar
(g / De) Shindo
(%) Section retention
(%) Hollow rate
(%) Thermal insulation
Example 1 POY 85/24 3.0 2.6 137 99 52 10 Example 2 POY 100/24 3.0 2.7 133 99 53 10 Example 3 POY 80/36 3.0 2.7 132 98 51 9 Example 4 POY 125/36 3.0 2.6 130 98 50 9 Example 5 POY 135/36 3.0 2.7 135 98 55 10 Example 6 POY 135/72 3.0 2.4 134 98 52 10 Example 7 POY 50/36 3.5 2.5 135 98 52 9 Example 8 POY 85/72 3.5 2.5 128 98 49 10 Example 9 SDY 75/36 3.0 4.3 31 98 53 10 Example 10 SDY 75/72 3.0 4.2 32 98 52 9 Example 11 SDY 50/36 3.5 4.3 30 98 54 10 Example 12 DTY 50/36 3.0 4.3 28 98 48 10 Example 13 DTY 50/48 3.0 4.3 29 98 50 9 Example 14 DTY 75/36 3.0 4.2 31 98 49 10 Example 15 DTY 75/72 3.5 4.0 27 98 51 10 Comparative Example 1 POY 85/24 - 2.2 140 85 40 7 Comparative Example 2 POY 85/24 2.8 2.3 136 90 42 6 Comparative Example 3 POY 85/24 2.5 2.1 135 90 40 7

※ How to measure

1. Section Retention Ratio

When two kinds of polymer are radiated, it is possible to escape the shape of a circular shape due to the difference in the flowability of the yarn. Therefore, it is required that the cross-sectional shape of the irradiated yarn has a perfect circular shape, Measure and compare.

2. Insulation

Measuring method of heat insulation: Thermal Transmittance according to KS K 0466

The warmth test is to measure how much heat is kept to keep the heat for a certain time by putting the sample on the heat plate 50cm * do.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

Claims

In the composite hollow fiber,
The sheath part is formed of a nylon resin and the core part is formed of a usable polymer partly exposed to the outside,
Wherein the core portion is eluted and the sheath portion after elution has a C-shaped cross-section.

The method according to claim 1,
Wherein the nylon resin has a relative viscosity (RV) of 3.0 to 3.5.

The method according to claim 1,
The usable polymer may be composed of polyethylene terephthalate (PET) copolymerized with a polyester resin containing 5 to 5 mol% of 5-sodium sulfoisophthalic acid with respect to terephthalic acid or its derivative, Wherein the resin composition comprises 90 to 95% by weight of a polyester resin and 5 to 10% by weight of a water-soluble polyalkylene oxide having a number average molecular weight of 400 to 20,000 .

The method according to claim 1,
Wherein the elution type composite hollow fiber has a hollow ratio of 45% to 55% of the total cross-sectional area after eluting the usable polymer.

A leaching type composite hollow construction manufactured using the composite hollow fiber according to any one of claims 1 to 4.

6. The method of claim 5,
Wherein the composite joint construction is finely divided into 50 to 200 deniers and 24 to 72 filaments.

6. The method of claim 5,
Wherein the composite joint construction is any one of a partially expanded yarn (POY), a drawn yarn (SDY), and a false twist yarn (DTY).