KR20140073274A - Manufacturing method of water soluble conjugated hollow yarn - Google Patents

Abstract

The present invention relates to a method for producing a hollow composite yarn in which a sheath portion is formed of a polyester-based or polyamide-based synthetic resin and a core portion is formed of a water-soluble polymer, wherein the polyester-based synthetic resin or polyamide- A melting step of melting the water-soluble polyester-based synthetic resin; And a composite spinning step of spinning the molten polyester-based or polyamide-based synthetic resin with a cis portion of a water-soluble polyester to a core portion, wherein the core portion is formed to be partially exposed to the outside and formed into a C- And a method for manufacturing a water-soluble composite construction.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a water-

The present invention relates to a method for producing a water-soluble composite hollow construction, and more particularly, to a method for manufacturing a water-soluble composite hollow construction having excellent hollowness without any change in the shape of hollows formed in the fibers. Also, the present invention relates to a method for manufacturing a composite heavy construction in which contamination by wastewater is minimized because alkali is not used in the elution step.

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 high hollow fiber contains a large number of air layers. Therefore, the hollow fiber has been widely used for thermal insulation clothes, quilt, thermal insulation quilts and sleeping bags. However, the hollow fiber developed so far has a problem in that the pressure imbalance in the upper part of the radiation hole during spinning, There is a drawback that the yarn is opened by the air vortex during the cooling process or the hollow yarn is opened when the yarn is repeatedly used and the air layer is lost, so that the repellency, the nobility, the warmth and the dyability are poor.

Conventionally, as a method of increasing the hollow ratio of a hollow fiber, Korean Patent No. 0062548 discloses that the three sides of a holding hole are formed in an arc shape, which is a part of a circle having a radius R, and the above- 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 spinneret holes of the three sides and having a generally triangular shape as the spinneret.

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 adjusting the angle and length of the bent portion according to the number of the curved slits.

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

Water-soluble polyesters have been applied in various fields such as fibers, adhesives, and biodegradable materials. In particular, in the field of fibers, it may be used as a raw material for producing microfibers.

As a method for producing such a water-soluble polyester, 5-sodium sulfoisophthalic acid and a derivative thereof are used to obtain a sodium sulfonate salt in a polyester molecular chain to be hydrated or reacted with a glycol component, Melichtic hydride and the like to introduce a carboxyl group into the terminal and molecular chain and then to form a salt with an alkali component such as ammonia and amines to thereby allow the carboxyl group to be hydrolyzed.

Specifically, Korean Patent Laid-Open Publication No. 1994-14494 discloses a water-soluble polyester resin composition obtained by reacting a glycol component with a dicarboxylic acid, wherein an ester oligomer prepared by reacting a glycol component with the dicarboxylic acid is reacted with a dicarboxylic acid 1 3 to 10 molar ratio of a mixture of butyltetracarboxylic acid alone or trimellitic anhydride to the molar ratio of 0.1 to 0.8 dl / g and an acid value of 40 to 100 mg / g. Soluble polyester resin composition " WO2002 / 57334 discloses a process for preparing an aqueous or methanolic slurry comprising a) 1,4-cyclohexanedimethanol (CHDM) and dicarboxylic acid, maintaining the slurry at a temperature below the melting point of CHDM , b) feeding the slurry to a reactor, c) esterifying the slurry, optionally at a temperature and pressure sufficient to effect the esterification, in the presence of a suitable catalyst, d) forming a prepolymer, and e) polycondensing the prepolymer in the presence of a suitable catalyst at a temperature and pressure sufficient to effect polycondensation to form the polyester, "proposes a process for preparing a water soluble polyester comprising CHDM .

The above-described technique is to increase the glass transition temperature (Tg) by adding CHDM, but it does not substantially affect the Tg substantially. When the elution and the weight reduction are performed, the elution and the weight loss rate are lowered .

The present invention is directed to a hollow fiber which is prevented from being deformed or broken by hollow fibers such as post-processing, weaving, salt processing, etc. as described above, and a method for producing a water- And to provide the above objects.

It is another object of the present invention to provide a method for producing a water-soluble composite hollow structure having a very high hollow ratio when the water-soluble polymer is eluted by a composite hollow construction of C-shaped cross-section.

The present invention is a method for producing a hollow composite yarn wherein a sheath portion is formed of a polyester-based or polyamide-based synthetic resin and a core portion is formed of a water-soluble polymer, wherein the polyester- A melting step in which the polyamide-based synthetic resin is melted at 245 to 265 ° C, and the water-soluble polyester-based synthetic resin is melted at 210 to 270 ° C; And a composite spinning step in which the molten polyester-based or polyamide-based synthetic resin is formed into a core part with a cis portion and spinning at 265 to 285 ° C, wherein the core part is formed so that a part of the core part is exposed to the outside, Shaped hollow fiber of the cross-sectional shape.

Also, the present invention provides a method for manufacturing a water-soluble composite construction, wherein the composite construction is produced with a fineness of 50 to 200 deniers and 18 to 100 filaments.

Further, the present invention provides a method for manufacturing a water-soluble composite hollow structure, wherein the composite hollow structure is eluted for 1 to 120 minutes in general-purpose water without using alkali such as sodium hydroxide (NaOH).

Also, the water-soluble composite construction is characterized in that the hollow ratio of the water-soluble polyester-based synthetic resin is 25% or more, preferably 25% to 45% of the cross-sectional area.

The present invention also provides a method for manufacturing a water-soluble composite hollow structure, wherein the composite spinning is a C-shaped spinneret.

In addition, the present invention further provides a method for manufacturing a water-soluble composite hollow structure, which further comprises a step of producing a partially expanded yarn (POY) after the composite spinning step.

The present invention also provides a method for manufacturing a water-soluble composite hollow structure, wherein the partially expanded filament yarn (POY) is produced by winding the spinning composite yarn at 2,200 to 3,200 mpm (m / min) do.

Also, the present invention provides a method for manufacturing a water-soluble composite heavy construction, further comprising a step of forming a drawn yarn (SDY) after the composite spinning step.

Also, in the step of producing the drawn yarn (SDY), the composite yarn is stretched by a first winding in which the composite yarn is wound at 1,000 to 1,700 mpm (m / min) and a second winding at 2,500 to 4,200 mpm (m / (SDY) is produced in a water-soluble composite resin.

Further, the present invention provides a method for manufacturing a water-soluble composite heavy construction, wherein the composite construction is a false twist yarn (DTY).

Also, the twist of the false-twist yarn is 2,000 to 3,600 (Twist / m).

As described above, the composite joint construction manufactured by the manufacturing method of the water-soluble composite joint construction according to the present invention uses a water-soluble polymer, and therefore, when the yarn of the yarn is not formed, There is an effect.

In addition, after the yarn is processed, the fabric is formed into a fabric or knitted fabric, and the hollow fiber is not deformed by eluting the water-soluble polymer before the dyeing process, thereby providing a hollow yarn of high shear rate.

Further, the water-soluble polymer in the core portion is exposed to the outside, and the water-soluble polymer is smoothly eluted with the sheath-core type composite core work, so that the hollow is easily formed.

1 is a process diagram showing a manufacturing process of a water-soluble composite construction according to the present invention.
2 is a cross-sectional view showing a cross section of the water-soluble composite construction according to the present invention.
3 is a view showing a spinneret capable of manufacturing a water-soluble composite construction 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 various kinds of yarns and fibers in general.

2 is a cross-sectional view illustrating a cross-section of a water-soluble composite joint construction according to the present invention. FIG. 3 is a cross-sectional view illustrating a water- Fig. 2 is a view showing a spinning cage capable of being used.

The present invention relates to a method for producing a water-soluble composite construction using a water-soluble polymer. As shown in Fig. 1, a polyester synthetic resin or a polyamide synthetic resin in a sheath portion and a water soluble polyester synthetic resin in a core portion are melted And a composite spinning step of spinning the synthetic resins into a composite yarn.

As shown in FIG. 2 (a), the water-soluble composite construction manufactured by the method of the present invention is formed of a polyester-based or polyamide-based synthetic resin 100 as a sheath portion, Water-soluble polyester-based synthetic resin 200, and the core part is formed so as to be partially exposed to the outside and formed into a C-shaped cross-section hollow fiber (FIG. 2 (b)) after elution.

As the polyester synthetic resin used in the present invention, polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT) may be used, and a polyester synthetic resin having added functionality may also be used It will be possible.

The polyamide-based synthetic resin may be nylon 6, nylon 6 · 6, nylon 6 · 10, or the like. Polyamide-based synthetic resin having added functionality may also be used.

It is preferable that the water-soluble polymer is a water-soluble polyester-based synthetic resin which is easily hydrolyzed into water for general use.

The water-soluble polyester-based synthetic resin is used in many fields today and has an advantage of being easy to purchase and easily soluble in general-use water.

The polymer for the water-soluble polyester-based conjugate fiber according to the present invention may include diols, acids, and the like.

The acids may be at least one kind selected from the group consisting of terephthalic acid (TPA), isophthalic acid (IPA), and dimethyl 5-sodiosulfo isophthalate (DMS). For example, acids may be composed of 60 to 70 mol% of terephthalic acid, 20 to 30 mol% of isophthalic acid, and 10 to 20 mol% of dimethyl terephthalic acid.

The diol may be a diol containing at least one selected from ethylene glycol (EG), diethylene glycol (DEG) and polyethylene glycol (PEG) as non-limiting examples. For example, as diols, ethylene glycol may be 60 to 90 mol%, and diethylene glycol may be 10 to 30 mol%.

In one embodiment of preparing the polymer of the present invention, the polymerization is started by mixing the dimethyl 5-sodiosulfoisophthalate and ethylene glycol at a molar ratio of 1: 8 to 1:12. At this time, To about 0.5% by weight of the composition. Upon initiation of the polymerization, bis-β-hydroxyethyl terephthalate (BHET) may be further added to perform the polymerization reaction through the transesterification reaction between the prepolymers.

In addition, terephthalic acid, isophthalic acid, and dimethyl glycol may be added to the polymer and reacted to perform an esterification reaction. The mixing ratio of terephthalic acid and dimethyl glycol is about 1: 1 to 1: 1.5, and the mixing ratio of isophthalic acid and dimethyl glycol is 1: 1 to 1: 1.5.

Polyethylene glycol may be further added for condensation polymerization. The polyethylene glycol preferably has a number average molecular weight of 300 to 2,000, and the amount of the polyethylene glycol may be 5 to 10% by weight based on the total weight of the polymer. Thereafter, at least one additive selected from the group consisting of a reaction catalyst, a defoaming agent, an antioxidant, and a heat stabilizer may be further added. The antifoaming agent may be contained in an amount of 0.01 to 0.05% by weight based on the total weight of the polymer. The antioxidant may be included in the total weight of the polymer in an amount of 500 to 800 ppm, and the heat stabilizer may be contained in an amount of 100 to 500 ppm in the total weight of the polymer.

The water-soluble polyester-based synthetic resin to be used in the present invention may be any water-soluble polyester-based synthetic resin eluted in water for general use other than the water-soluble polyester-based synthetic resin as described above. Here, the general purpose water is a general water used in the art, for example, distilled water or the like.

In the method for producing a water-soluble hollow composite yarn of the present invention, the melting step of the polyester-based synthetic resin is melted at 285 to 295 ° C, or the polyamide-based synthetic resin is melted at a temperature of 245 to 265 ° C, Is a preparation step of a composite spinning step in which melting is performed at 210 to 270 ° C.

The composite spinning step may include spinning the molten polyester-based or polyamide-based synthetic resin at 265 to 285 ° C by forming a water-soluble polyester as a core part with a cis portion so that after the water-soluble polymer is eluted, The core portion should be formed so that a part thereof is exposed to the outside.

The water-soluble composite masonry may be manufactured from an eccentric cis-core composite yarn formed in such a manner that the synthetic resin of the core is exposed to the outside in a cis-core type composite yarn in order to form a C-shaped cross-section hollow fiber after elution.

However, since the eccentric sheath-core type composite yarn 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 during spinning, .

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 water-soluble polymer is discharged from the hole of B to form a cis-core type composite Construction can be made.

As described above, the cis-core type composite yarn made of the C-type spinneret can easily be exposed to the eluting solution when the synthetic resin of the core portion is easily exposed to the outside, thereby eluting the water-soluble polymer.

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 step (POY) manufacturing step, the spinning spinning composite yarn is spinning at 2,200 to 3,200 mpm (m / min) The hollow fibers may be made of partially drawn fibers (POY).

After the composite spinning step, a step of manufacturing a drawn yarn (SDY) may be further included, and the step of forming the drawn yarn (SDY) may include a first spinning operation for winding the spinning composite yarn at 1,000 to 1,700 mpm (m / To 4,200 mpm (m / min), the water-soluble composite hollow construction can be manufactured as a drawn product (SDY) by stretching the water-soluble composite hollow construction.

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, it is possible to further include a step of manufacturing a false-twist yarn made of water-soluble hollow yarn as the partially drawn yarn or stretched yarn and then made of 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 300 to 600 m / min, twisting of 2,000 to 3,600 (twist / m) and 130 to 180 ° C, The water-soluble composite hollow construction manufactured by using the warp yarn can be manufactured.

Further, the water-soluble composite construction according to the present invention may be manufactured from various yarns other than the partially drawn yarn, the drawn yarn, and the false twist yarn in various yarns.

As described above, it is preferable that the water-soluble composite construction manufactured by the method of manufacturing a water-soluble composite joint construction according to the present invention is manufactured with a fineness of 50 ~ 200 deniers and 18 ~ 100 filaments for ease of use.

The water-soluble polyester-based synthetic resin should be eluted in order to form a hollow in the water-soluble composite hollow construction manufactured as described above.

In the method of eluting the water-soluble polyester-based synthetic resin, it is preferable that the composite construction is dipped in general-purpose water and eluted.

When eluted from the above-mentioned water for general use, the elution time may vary depending on the temperature of the water, but it is preferably eluted for 1 to 120 minutes.

It is preferable that the water-soluble composite resin construction has a void of 25% or more, preferably 25% to 45%, more preferably 25% to 35% of the hollow area after the water-soluble polyester synthetic resin 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 water-soluble polymer in post-processing, and if it exceeds 45%, the strength may be lowered. It is recommended to use it within the range.

As described above, the water-soluble composite hollow-core construction manufactured by the method of the present invention is completed by the post-treatment process of the false-twist yarn and the like and the fixing of the fabric formation, and then the water-soluble polymer is dissolved in the alkali just before the dyeing process. And is formed into a hollow fiber capable of maintaining a hollow shape.

Hereinafter, examples of the method for producing the water-soluble composite construction of the present invention are shown, but are not limited thereto.

Example  :  receptivity Composite construction  Produce

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

The water-soluble polymer in the core part was initiated by adding dimethyl 5-sodium diisopropyphosphate and ethylene glycol, and bis-β-hydroxyethyl terephthalate, terephthalic acid, isophthalic acid, and dimethyl glycol were added to initiate the esterification reaction.

The dimethyl 5-sodiosulfoisophthalate had a number average molecular weight of 300 and was added in an amount of 10 mol% as a whole. Terephthalic acid had a number average molecular weight of 150 and was added in an amount of 70 mol% to all the acids. And an average molecular weight of 150. The total amount of the acids was 20 mol%. The ethylene glycol had a number average molecular weight of 60 and was fed with 70 mol% based on the diol and 30% with diethylene glycol having a number average molecular weight of 110. The total diols and the total diols were added in a molar ratio of 1: 1.2.

Next, polyethylene glycol was added for condensation polymerization, and defoamer, antioxidant and heat stabilizer were added thereto. The polyethylene glycol had a number average molecular weight of 300 and was added to account for 7 wt% of the total polymer. Other defoaming agents were added in an amount of 0.02 wt%, an antioxidant was added in an amount of 500 ppm, and a heat stabilizer was added in an amount of 200 ppm.

(POY) and drawn yarn (SDY) were produced by using the above-mentioned water-soluble polymer and the spinning conditions in Table 1, and the total of five types (POY 80 (fineness) / 36 (filament), POY 130/36, SDY 75/36, DTY 50/36, DTY 75/36).

Fiber form Radiation temperature G / R1 speed G / R1 temperature G / R2 speed G / R2 temperature POY 280 2,930 - 3,030 - SDY 280 1200 80 4000 120

Partially stretched yarn (POY) and stretched yarn (SDY) were produced using nylon 6, a polyamide-based synthetic resin, and the water-soluble polymer, (Fineness) / 36 (filament), SDY 75/36).

Fiber form Radiation temperature G / R1 speed G / R1 temperature G / R2 speed G / R2 temperature POY 130/36 275 2,450 - 2,500 - SDY 75/36 275 1,100 80 4,000 120

Further, the partially stretched yarn (POY 80/36, POY 130/36) was used as a DTY 50/36 false twist yarn and a DTY 75/36 false twist yarn, respectively. The false twist yarn (DTY) , A twist number of 3,000 TM (twist / m) Z kite, and 150 ° C.

Experimental Example  One : Cis ( PET ) -Core (water soluble Polymer ) Properties of water-soluble composites

The strength and elongation of each of five types (POY 80/36, POY 130/36, SDY 75/36, DTY 50/36, DTY 75/36) manufactured by the spinning conditions of Table 1 above The properties are shown in Table 3.

kind The island (de ') Strength (g / de) Shinto (%) POY 80/36 80 2.0 130 POY 130/36 130 1.9 130 SDY 75/36 75 3.3 35 DTY 50/36 50 3.2 25 DTY 75/36 75 3.2 25

Experimental Example  2 : Cis (Nylon 6) -core (water soluble Polymer ) Properties of water-soluble composites

(POY 130/36, SDY 75/36) were manufactured under the spinning condition of Table 2 above. The strength and elongation properties of each yarn were measured and shown in Table 4.

kind The island (de ') Strength (g / de) Shinto (%) POY 130/36 130 1.9 140 SDY 75/36 75 3.4 32

As shown in Tables 3 and 4, it can be seen that the water-soluble composite yarn using the water-soluble composite hollow fiber according to the present invention is suitable for the application of strength and elongation.

Experimental Example  3: Cis ( PET ) -Core (water soluble Polymer ) Extraction experiment of water-soluble composite construction

Radiation conditions in Table 1 of the above Examples POY 80/36, SDY 75/36 and DTY 75/36 in the prepared water-soluble composite multi-layer constructions were eluted at distilled water at 100 ° C for 30 minutes to evaluate the hollowness and elution properties The results are shown in Table 5 below.

As shown in Table 5, it can be seen that the shape of the cross section appears to be round and uniform, while the partially drawn yarn (POY 80/36) and the drawn yarn (SDY 75/36), which are originated from the spinning stage. It was confirmed that the cross section was deformed at the time of manufacture with false twist yarn (DTY 75/36), but the hollow was maintained.

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.

100: sheath portion 200: core portion
A: sheath portion B: core portion

Claims (11)

Wherein the sheath portion is formed of a polyester-based or polyamide-based synthetic resin and the core portion is formed of a water-soluble polymer,
Melting at a temperature of 285 to 295 ° C for the polyester-based synthetic resin or 245 to 265 ° C for the polyamide-based synthetic resin and melting at 210 to 270 ° C for the water-soluble polyester-based synthetic resin;
And a composite spinning step of forming the melted polyester-based or polyamide-based synthetic resin into a cis portion and spinning the water-soluble polyester into a core portion and spinning the composite yarn at 265 to 285 ° C,
Wherein the core part is formed to be partially exposed to the outside and is formed into a C-shaped cross-section hollow fiber after elution. The method according to claim 1,
Wherein the composite construction is made of a fineness of 50 to 200 denier and 18 to 100 filaments. The method according to claim 1,
Wherein the composite hollow structure is eluted for 1 to 120 minutes in a general-purpose water. The method according to claim 1,
Wherein the water-soluble composite resin construction has a hollow ratio of 25% to 45% of a cross-sectional area after eluting the water-soluble polyester-based synthetic resin. The method according to claim 1,
Wherein the composite spinning step uses a spinneret of type C in the composite spinning step. The method according to claim 1,
Further comprising: after the composite spinning step, producing a partially drawn yarn (POY). The method according to claim 6,
Wherein the step of preparing the partially expanded yarn (POY) comprises winding the spinning composite yarn at 2,200 to 3,200 mpm (m / min) to produce the partially expanded yarn (POY). The method according to claim 1,
Further comprising: after the composite spinning step, a step of producing a drawn yarn (SDY). 9. The method of claim 8,
In the step of producing the drawn yarn (SDY), the composite yarn is stretched by a first winding in which the composite yarn is wound at 1,000-1,700 mpm (m / min) and a second winding at 2,500-4,200 mpm (m / min) (SDY). ≪ / RTI > The method according to claim 1,
Wherein the composite hollow construction is a false twist yarn (DTY). 11. The method of claim 10,
Wherein the twist of the false-twist yarn is 2,000 to 3,600 (twist / m).

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