KR20160141275A - Extraction type conjugated hollow fiber and hollow yarn - Google Patents

Abstract

The present invention relates to an extraction-type conjugated hollow fiber and an extraction-type conjugated hollow yarn. In the conjugated hollow fiber, a sheath portion is formed of polyamide resin or polyester resin and a core portion is formed of an available polymer partially exposed to the outside. The core portion is extracted. After the extraction, the sheath portion is formed into a C-shaped cross section. The available polymer is a resin composition containing 5 to 10 wt% of water-soluble polyalkylene oxide with a number-average molecular weight of 400 to 20,000 and 90 to 95 wt% of polyester resin containing 0.1 to 1 mol % of dimethyl-5-sulfo isophthalate phosphonium salt (DMSP) or di(beta-hydroxyethyl)-5-sulfo isophthalate phosphonium salt (DHSP) and 2 to 5 mol % of 5-sodium sulfo isophthalic acid (DMS) with respect to terephthalic acid or its derivative.

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.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the related art.

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

In the composite hollow fiber of the present invention, the sheath portion is formed of a polyamide-based resin or a polyester-based resin, and the core portion is formed of a usable polymer partly exposed to the outside, and the core portion is eluted, The sheath is formed in a C-shaped cross-section, and the usable polymer comprises 0.1 to 1 mol% of dimethyl-5-sulfoisophthalate phosphonium salt (DMSP) or terephthalic acid 5-sulfo isophthalate phosphonium salt (DHSP) and 2 to 5 mol% of 5-sodium sulfoisophthalic acid (DMS). By weight of a water-soluble polyalkylene oxide having a number average molecular weight of 400 to 20,000 and 5 to 10% by weight of a water-soluble polyalkylene oxide having a number average molecular weight of 400 to 20,000 The.

Also, the polyamide-based resin has a relative viscosity (RV) of 3.0 to 3.5.

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

Further, there is provided a leaching type composite hollow structure produced by using the hollow fiber described above.

Further, the present invention provides a leaching type compounding work, characterized in that the compounding work is one of a partially drawn lumber (POY), a drawn lumber (SDY), and a false lumber (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.

In addition, the elution type composite hollow fiber of the present invention can be produced by mixing 5-sodium sulfoisophthalic acid (DMS) with dimethyl -5-sulfoisophthalate phosphonium salt (DMSP) or di (? -Hydroxyethyl group) -sulfo isophthalate phosphor (DHSP), it is possible to reduce the cost.

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.

The present invention relates to a dissolvable composite hollow fiber, which comprises a sheath portion and a core portion in the form of a C-shaped cross-section as shown in Fig. 1, and is formed of the polyamide-based resin or polyester-based resin , And the core portion may be formed of a usable 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.

The polyamide resin used in the sheath portion or the polyamide resin in the polyester resin may be nylon 6 or nylon 66. The relative viscosity of the nylon resin may be in the range of 3.0 to 6.0, 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 relative viscosity (RV) is more than 3.5, the spinning is not performed well.

The polyester resin used for the sheath may be one selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and PTT (Polytrimethylene terephthalate (PTT) Can be used.

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.

The usable polymer of the present invention should be formed so as to be easily dissolved in an alkaline solution. In the present invention, 0.1 to 1 mol% of dimethyl-5-sulfo isophthalate phosphonium salt , DMSP) or di (? -Hydroxyethyl group) -sulfo isophthalate phosphonium salt (DHSP) and 2 to 5 mol% of 5-sodium sulfoisophthalic acid (DMS), and 5 to 10% by weight of a water-soluble polyalkylene oxide having a number average molecular weight of 400 to 20,000.

(DMSP) or di (beta -hydroxyethyl group) -sulfo isophthalate phosphonium salt (DHSP), and the useable poly The use of the ester resin can increase the strength of the yarn produced, and the strength of the yarn can be increased to increase the radioactivity to be fused and to reduce embroidering phenomenon in yarn processing.

(DMSP) or di (? - hydroxyethyl group) -sulfo isophthalate phosphonium salt (DHSP) was used only by using 5-sodium sulfoisophthalic acid (DMS) Sulfo isophthalate phosphonium salt (DMSP) or di (? -Hydroxyethyl group) -sulfo isophthalate phosphonium salt (DHSP) can be more reduced than that in the case of the conventional method.

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 polyamide-based resin or the polyester-based resin is discharged into the hole of the (1), and the usable polymer is released from the hole of (2) Can be produced.

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%.

When eluted 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 1 to 60 minutes.

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

The usable composite construction can control the fineness and the number of filaments according to the purpose of use, but it is generally preferred that the fineness is made from 50 to 200 deniers and 20 to 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 is produced by melting the polyamide-based resin or the polyester-based resin in the sheath portion and the usable polymer in the core portion and then spinning the composite, Depending on the type of yarn, the yarn can be used either as a partially drawn yarn (POY), a drawn yarn (SDY), or a twist yarn (DTY).

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

The nylon 6 resin having a relative viscosity of 3.0 was used as the cisternal portion in the production of the conjugate fiber. The usable polymer in the core portion was 0.8 mol% of dimethyl-5-sulfoisophthalate phosphonium salt and 4 mol% of terephthalic acid or its derivative A resin composition containing 95 wt% of a polyester-based resin containing 5-sodium sulfoisophthalic acid (DMS) and 5 wt% of a water-soluble polyalkylene oxide having a number average molecular weight of about 10,000 was used, To produce the elutable hybrid hollow fiber of the present invention.

Example  2

The utilization polymer of the core part was prepared in the same manner as in Example 1 except that 95 wt% of a polyester resin containing 0.5 mol% of (beta -hydroxyethyl) -sulfo isophthalate phosphonium salt with respect to terephthalic acid or a derivative thereof, A resin composition containing 5% by weight of polyalkylene oxide was used.

Example  3

The same procedure as in Example 1 was carried out except that polyethylene terephthalate (PET) was used as the sheath.

Example  4

The same procedure as in Example 2 was carried out except that polyethylene terephthalate (PET) was used as the sheath.

Comparative Example  One

The same procedure as in Example 1 was carried out. However, elutable hybrid hollow fibers were prepared using only sodium sulfoisophthalic acid (DMS) as the usable polymer in the core portion.

Comparative Example  2

The same procedure as in Example 3 was carried out. However, elutable hybrid hollow fibers were prepared using only sodium sulfoisophthalic acid (DMS) as the usable polymer in the core portion.

* Manufacture of composite hollow fiber

The composite hollow fibers prepared in Examples 1 to 4 and Comparative Examples 1 and 2 were prepared with partially drawn (POY), drawn (SDY) and twisted yarn (DTY) and then sodium hydroxide was used to elute the usable polymer .

The partially stretched yarn was produced by winding the fibers that were radiated after the composite yarn at 2800 mpm, and the stretched yarn was produced by first winding at 1500 mph and at second winding at 3500 mpm.

The false-twist yarn was manufactured by drawing a stretched yarn at a speed of 450 m / min, a twisting number of 3000 TM and heat setting at 160 캜.

After preparing the partially drawn, drawn and twisted yarn as described above, it was immersed in a 2% aqueous solution of sodium hydroxide for 3 minutes to elute the usable polymer.

The spinning processability of the composite hollow fibers prepared in Examples 1 to 4 and Comparative Examples 1 and 2 and the cross-sectional retention after elution were measured, and the partial hollow fibers prepared from the composite hollow fibers of Examples 1 to 4 and Comparative Examples 1 and 2 were measured. The strength and flammability of the shrines, soft wares and false wares were measured and shown in Table 1.

※ How to measure

1. Section Retention Ratio

* If two kinds of polymer are emitted, it is possible to escape the shape of circular due to the difference of the flowability of the yarn. Therefore, the shape of the irradiated yarn has a perfect circular shape, the diameter of the circle is constant, Are measured and compared.

2. Fairness assessment

* Grade 1 production / total production * 100 = Yield (by weight)

division Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 sheath Nylon Nylon Polyester Polyester Nylon Polyester Core Soluble polyalkylene
Oxide Soluble polyalkylene
Oxide Soluble polyalkylene
Oxide Soluble polyalkylene
Oxide Soluble polyalkylene
Oxide Soluble polyalkylene
Oxide DMSP + DMS DHSP + DMS DMSP + DMS DHSP + DMS DMS DMS section C type C type C type C type C type C type POY Intensity (g / De ') 2.74 2.87 2.68 2.65 2.10 1.90 SDY Intensity (g / De ') 4.39 4.4 4.2 4.18 4.00 3.91 DTY Intensity (g / De ') 4.55 4.6 4.31 4.2 4.00 3.87 Radial fairness (%) 94 95 95 94 82 84 Flammability Fairness (%) 95 96 95 95 80 81

As shown in Table 1, the spinning processability of Examples 1 to 4 is superior to that of Comparative Examples 1 and 2, which shows that the elution type composite hollow fiber of the present invention has excellent processability and a high section retention ratio. Examples 1 to 4 The strength of the partially drawn yarn, the drawn yarn and the false twist yarn of Comparative Examples 1 and 2 are higher than those of Comparative Examples 1 and 2, and thus it can be seen that the elution type composite hollow yarn of the present invention has very excellent physical properties.

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 (5)

In the composite hollow fiber,
The sheath portion is formed of a polyamide resin or a polyester resin,
The core part is formed of a usable polymer partly exposed to the outside, and the core part is eluted. After the elution, the sheath part is formed into a C-shaped cross-
The above-
(Dimethyl-5-sulfoisophthalate phosphonium salt (DMSP) or di (? - hydroxyethyl group) -sulfo isophthalate phosphonium salt 90 to 95% by weight of a polyester resin containing 2 to 5 mol% of 5-sodium sulfoisophthalic acid (DMS), and a number average And 5 to 10% by weight of a water-soluble polyalkylene oxide having a molecular weight of 400 to 20,000.
The method according to claim 1,
Wherein the polyamide-based resin has a relative viscosity (RV) of 3.0 to 3.5.
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 3.
5. The method of claim 4,
Wherein the composite joint construction is any one of a partially expanded yarn (POY), a drawn yarn (SDY), and a false twist yarn (DTY).

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