CN114008255B - Polyester composite fiber with good elasticity and preparation method thereof - Google Patents
Polyester composite fiber with good elasticity and preparation method thereof Download PDFInfo
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- CN114008255B CN114008255B CN202080045760.8A CN202080045760A CN114008255B CN 114008255 B CN114008255 B CN 114008255B CN 202080045760 A CN202080045760 A CN 202080045760A CN 114008255 B CN114008255 B CN 114008255B
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- 239000000835 fiber Substances 0.000 title claims abstract description 186
- 239000002131 composite material Substances 0.000 title claims abstract description 144
- 229920000728 polyester Polymers 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims description 20
- 238000009987 spinning Methods 0.000 claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims description 42
- 230000008018 melting Effects 0.000 claims description 42
- 239000006224 matting agent Substances 0.000 claims description 29
- -1 polybutylene terephthalate Polymers 0.000 claims description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 18
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 14
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 14
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 claims 1
- 229910052814 silicon oxide Inorganic materials 0.000 claims 1
- 239000004744 fabric Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 18
- 230000002829 reductive effect Effects 0.000 description 13
- 229920002334 Spandex Polymers 0.000 description 12
- 239000004759 spandex Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 238000009940 knitting Methods 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000009998 heat setting Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002074 melt spinning Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000000379 polymerizing effect Effects 0.000 description 3
- 229920000874 polytetramethylene terephthalate Polymers 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000008041 oiling agent Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- JIABEENURMZTTI-UHFFFAOYSA-N 1-isocyanato-2-[(2-isocyanatophenyl)methyl]benzene Chemical compound O=C=NC1=CC=CC=C1CC1=CC=CC=C1N=C=O JIABEENURMZTTI-UHFFFAOYSA-N 0.000 description 1
- 235000017060 Arachis glabrata Nutrition 0.000 description 1
- 241001553178 Arachis glabrata Species 0.000 description 1
- 235000010777 Arachis hypogaea Nutrition 0.000 description 1
- 235000018262 Arachis monticola Nutrition 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
Abstract
The present invention relates to a polyester composite fiber having excellent stretchability and a method for producing the same, and more particularly, to a polyester composite fiber produced by composite spinning a first component and a second component and having an intrinsic viscosity of 0.60dl/g to 0.80dl/g and a rison shrinkage (Leesona shrinkage) (%) of 15% to 30%, which has improved stretchability, does not generate gloss, and is excellent in touch feeling, and a method for producing the same.
Description
Technical Field
The present invention relates to a polyester conjugate fiber having excellent stretchability and a method for producing the same, and more particularly, to a polyester conjugate fiber having improved stretchability, no gloss, and excellent touch feeling and a method for producing the same.
Background
Recently, as demand for a fabric requiring high stretchability increases, market demand for Spandex (Spandex) is on the rise. Spandex is a polyurethane fiber obtained by polymerizing polyether and methylene diphenyl isocyanate and melt-spinning, and has better quality than the existing rubber yarn, for example, lighter weight than rubber bands and higher aging resistance.
In addition, spandex is a unique fiber that is elastic like rubber, has very high tensile strength (tenacious) and/or ultimate strength (ultimate strength), and thus is not prone to breakage, and has sufficient stretchability to be stretchable to 5 to 8 times its original length.
In addition, the spandex is not soiled by sweat, greasy dirt and cosmetics, and is washable. In addition, the spandex can pull out fine lines which are not available in rubber, and has good dyeing property.
On the other hand, spandex has excellent stretchability, is easy to move, and has excellent durability, perspiration and dryness, and therefore is widely used for various applications such as underwear, liners, and outerwear. And, the spandex has advantages in that it has perspiration property and high drying ability that can rapidly perspiration, thus giving a pleasant feeling.
However, spandex is expensive, has poor heat resistance, has static electricity and alkali resistance, and cannot be used alone, and requires a separate coating process. Thus, only thicker fabrics can be obtained, and there are limitations to markets that increasingly require thinner fabrics.
To overcome these drawbacks of spandex, stretchable latent crimp yarns have been proposed. The latent crimp yarn is a fiber in which two polymers having different heat shrinkage properties are composite spun into a Side By Side (Side) or a Core-Sheath (length-Core), and then a high stretchability is imparted in a similar principle to a spring By physically taking a coil shape due to a difference in heat shrinkage caused By applying heat in a spinning process or a drawing process. Although the conventional spandex fiber is not satisfactory in terms of stretchability, a latent crimped fiber excellent in alkali resistance, morphological stability, and the like and easy to dye and post-process is often used due to the above-mentioned drawbacks of spandex.
On the other hand, as a latent crimped fiber, a fiber obtained by composite spinning a polyester resin having a difference in viscosity has been proposed, and the fiber produced by the above method cannot sufficiently obtain the desired stretchability.
In addition, there has been proposed a composite fiber comprising polytetramethylene terephthalate (polytetramethylene terephthalate, PTT) in a latent crimped yarn for high stretchability, but the cost of the monomer required for polymerization of polytetramethylene terephthalate is high, and therefore there is a problem that the manufacturing cost of the composite fiber itself increases due to the rise in material cost.
Disclosure of Invention
Problems to be solved
The present invention has been made to solve the above problems, and an object of the present invention is to provide a polyester conjugate fiber which does not generate gloss, is excellent in touch feeling, and has good stretchability, and a method for producing the same.
Means for solving the problems
In order to solve the above-described problems, the polyester composite fiber having good stretchability of the present invention may be a polyester composite fiber prepared by composite spinning a first component and a second component.
In a preferred embodiment of the invention, the first component may comprise polybutylene terephthalate (PBT).
In a preferred embodiment of the invention, the second component may comprise polyethylene terephthalate (PET).
In a preferred embodiment of the present invention, the polyester conjugate fiber of the present invention may satisfy the following relation 1.
[ relation 1]
0.30dl/g≤|A-B|≤0.80dl/g
In the above relation 1, a represents the intrinsic viscosity of the first component, and B represents the intrinsic viscosity of the second component.
In a preferred embodiment of the invention, the first component may have an intrinsic viscosity of 0.90dl/g to 1.30dl/g.
In a preferred embodiment of the present invention, the melting point of the first component may be 200 ℃ to 250 ℃.
In a preferred embodiment of the invention, the second component may have an intrinsic viscosity of 0.40dl/g to 0.70dl/g.
In a preferred embodiment of the invention, the second component may have a melting point of 230 ℃ to 270 ℃.
In a preferred embodiment of the invention, the first component may further comprise a matting agent.
In a preferred embodiment of the invention, the second component may further comprise a matting agent.
In a preferred embodiment of the present invention, the matting agent may comprise a material selected from titanium oxide (TiO 2 ) Oxidation ofZinc (ZnO), silicon oxide (SiO) 2 ) Barium sulfate (BaSO) 4 ) At least one of them.
In a preferred embodiment of the present invention, the first component may include 1.0 to 3.0 weight percent of the matting agent with respect to the total weight percent.
In a preferred embodiment of the present invention, the second component may include 1.0 to 3.0 weight percent of the matting agent relative to the total weight percent.
In a preferred embodiment of the present invention, the weight ratio of the first component to the second component may be 30:70 to 70:30.
in a preferred embodiment of the present invention, the cross-sectional shape of the polyester composite fiber of the present invention may be peanut-shaped juxtaposition or circular juxtaposition.
In a preferred embodiment of the present invention, the intrinsic viscosity of the polyester composite fiber of the present invention may be 0.50dl/g to 0.80dl/g.
In a preferred embodiment of the present invention, the polyester composite fiber of the present invention may include 1.0 to 3.0 weight percent of a matting agent with respect to the total weight percent.
In a preferred embodiment of the present invention, the polyester composite fiber of the present invention may have a fineness of 20 denier to 180 denier and a number of single fibers of 12 to 96.
In a preferred embodiment of the present invention, the polyester composite fiber of the present invention may have a risen sodium shrinkage (Leesona shrinkage) (%) measured according to the following equation 1 of 15% to 30%.
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82℃for 10 minutes under a load of 20.5g, drying for 3 minutes, and measuring the length (L) 1 )。
In a preferred embodiment of the present invention, the residual shrinkage (%) of the polyester composite fiber of the present invention, which is measured according to the following equation 2, may be 45% to 70%.
[ equation 2]
In the above equation 2, in order to measure the residual shrinkage, a load of 1.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82℃for 10 minutes under a load of 1.5g, drying for 3 minutes, and measuring the length (L) 1 )。
On the other hand, the preparation method of the polyester composite fiber with good elasticity of the invention can comprise the following steps: a first step of melting the first component and the second component, respectively; and a second step of preparing a polyester composite fiber by composite spinning the molten first component and the second component.
In a preferred embodiment of the present invention, the composite fiber produced may be a side-by-side composite fiber having an intrinsic viscosity of 0.60dl/g to 0.80dl/g.
In a preferred embodiment of the present invention, the manufactured composite fiber may have a risen sodium shrinkage (%) of 15% to 30% as measured according to the following equation 1.
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82℃for 10 minutes under a load of 20.5g, drying for 3 minutes, and measuring the length (L) 1 )。
In a preferred embodiment of the invention, the first component may comprise polybutylene terephthalate (PBT) and a matting agent.
In a preferred embodiment of the present invention, the second component may include polyethylene terephthalate (PET) and a matting agent.
In a preferred embodiment of the present invention, the method for preparing a polyester composite fiber having good stretchability according to the present invention may satisfy the following relationship 1.
[ relation 1]
0.30dl/g≤|A-B|≤0.80dl/g
In the above relation 1, a represents the intrinsic viscosity of the first component, and B represents the intrinsic viscosity of the second component.
In a preferred embodiment of the present invention, the full lap ratio (%) of the polyester composite fiber prepared in the method for preparing a polyester composite fiber having good stretchability of the present invention, as measured according to the following equation 3, may be 80% or more.
[ equation 3]
Further, the fabric of the present invention includes the polyester conjugate fiber having good stretchability as described above.
The following will describe terms used in the present invention.
The term "fiber" as used herein means "Yarn" or "thread" and means a plurality of yarns or fibers in general.
The term "composite fiber" as used in the present invention means a filament itself produced by composite spinning or a fiber comprising the above-mentioned filament subjected to a drawing step and/or a partial drawing step.
The term "heat treatment temperature" as used in the present invention refers to the surface temperature of the secondary godet of godets commonly used in the drawing process.
ADVANTAGEOUS EFFECTS OF INVENTION
The polyester composite fiber with good stretchability of the present invention does not produce gloss and is excellent in touch feeling.
In addition, the polyester conjugate fiber having good stretchability of the present invention can be applied to various products requiring the use of a fiber excellent in stretchability and having no gloss. Specifically, the polyester conjugate fiber having good stretchability of the present invention is suitable for use as a yarn of woven or knitted fabrics requiring stretchability, and a fabric comprising the polyester conjugate fiber itself does not produce gloss and is excellent in touch feeling and stretchability.
Drawings
Fig. 1 is a schematic view of a juxtaposed composite fiber having a peanut-shaped cross-sectional shape, in accordance with a preferred embodiment of the invention.
Fig. 2 is an SEM photograph of juxtaposed composite fiber having a peanut-shaped cross-sectional shape in accordance with a preferred embodiment of the invention.
Fig. 3 is a schematic view of a juxtaposed composite fiber having a circular cross-sectional shape, in accordance with a preferred embodiment of the invention.
Fig. 4 is an SEM photograph of juxtaposed composite fiber having a circular cross-sectional shape, in accordance with a preferred embodiment of the invention.
Fig. 5 is a flow chart of a preparation process according to a preferred embodiment of the present invention.
Fig. 6 is a schematic diagram of a preparation process according to a preferred embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so as to enable those skilled in the art to which the present invention pertains to easily implement the present invention. The invention may be realized in many different embodiments and is not limited to the examples described in this specification. For the purpose of clarity of explanation, parts not related to the description are omitted in the drawings, and the same or similar constituent elements are given the same reference numerals throughout the specification.
The polyester composite fiber with good elasticity is prepared by composite spinning the first component and the second component.
The first component of the polyester composite fiber having good stretchability of the present invention may include polybutylene terephthalate (PBT). As an example, polybutylene terephthalate (PBT) can be prepared by polymerizing butanediol and terephthalic acid.
Also, the second component of the polyester composite fiber having good stretchability of the present invention may include polyethylene terephthalate (PET). As an example, polyethylene terephthalate (PET) can be prepared by polymerizing ethylene glycol and terephthalic acid.
On the other hand, the polyester conjugate fiber having good stretchability of the present invention may satisfy the following relation 1, and if the polyester conjugate fiber is out of the range described in the following relation 1, there is a possibility that the expression of stretchability is very low.
[ relation 1]
0.30 dl/g.ltoreq.A-B.ltoreq.0.80 dl/g, preferably 0.4 dl/g.ltoreq.A-B.ltoreq.0.70 dl/g, more preferably 0.4 dl/g.ltoreq.A-B.ltoreq.0.60 dl/g, even more preferably 0.45 dl/g.ltoreq.A-B.ltoreq.0.53 dl/g, most preferably 0.45 dl/g.ltoreq.A-B.ltoreq.0.49 dl/g
In the above relation 1, a represents the intrinsic viscosity of the first component, and B represents the intrinsic viscosity of the second component.
Further, the first component of the present invention may have an intrinsic viscosity (I.V) of 0.90dl/g to 1.30dl/g, preferably 0.92dl/g to 1.30dl/g, more preferably 0.95dl/g to 1.15dl/g, still more preferably 0.95dl/g to 1.05dl/g, and if the intrinsic viscosity is less than 0.90dl/g, there may be a problem that the desired stretchability cannot be achieved, and if the intrinsic viscosity is more than 1.30dl/g, the buckling phenomenon of the composite fiber produced at the time of composite spinning may be significantly increased, resulting in a problem that the spinning operability is deteriorated.
And, the second component of the present invention may have an intrinsic viscosity (i.v) of 0.40dl/g to 0.70dl/g, preferably, 0.45dl/g to 0.65dl/g, more preferably, 0.48dl/g to 0.60dl/g, still more preferably, 0.48dl/g to 0.53dl/g, and if the intrinsic viscosity is less than 0.40dl/g, a problem may occur in that the curl phenomenon of the composite fiber produced at the time of composite spinning is significantly increased, resulting in poor spinning operability, and if the intrinsic viscosity is greater than 0.70dl/g, there may be a problem in that the desired stretchability may not be achieved.
On the other hand, the first component of the present invention may have a melting point of 200 to 250 ℃, preferably 210 to 240 ℃, more preferably 220 to 230 ℃, and if the melting point is lower than 200 ℃, the crystallinity of the first component is reduced, and there is also a problem that the strength of the prepared composite fiber is reduced, and if the melting point is higher than 250 ℃, the melt spinning temperature is increased, so that pyrolysis occurs while the first component is melted, resulting in a problem that the strength of the prepared composite fiber is reduced.
And, the second component of the present invention may have a melting point of 230 to 270 ℃, preferably 240 to 265 ℃, more preferably 250 to 260 ℃, and if the melting point is lower than 230 ℃, the crystallinity of the second component is reduced, and if the melting point is higher than 270 ℃, the melt spinning temperature is increased, so that pyrolysis occurs while the second component is melted, resulting in a problem of reduced strength of the prepared composite fiber.
Furthermore, the first component of the present invention may further comprise a matting agent. At this time, the matting agent may include a material selected from titanium oxide (TiO 2 ) Zinc oxide (ZnO), silicon oxide (SiO) 2 ) Barium sulfate (BaSO) 4 ) More than one of them may preferably comprise titanium oxide (TiO 2 ). Further, the titanium oxide may have an anatase type, a rutile type or a brookite type crystal form, and the titanium oxide may be included in the above crystal forms alone or in combination, but the characteristics of the titanium oxide such as density, refractive index, light reflection and absorption characteristics are different depending on the crystal form, and thus may be used in an appropriate classification depending on the purpose and use. In order to control the dispersibility in the polymer and the light reflection performance, the surface-treated titanium oxide may be contained.
And, the first component of the present invention may include 1.0 to 3.0 weight percent of the matting agent with respect to the total weight percent, preferably, may include 1.2 to 2.5 weight percent of the matting agent, more preferably, may include 1.5 to 2.0 weight percent of the matting agent, and if the content of the matting agent is less than 1.0 weight percent, the gloss inhibiting effect may be reduced, and if the content of the matting agent is more than 3.0 weight percent, there may be a problem that the touch feeling of the fabric manufactured using the composite fiber of the present invention is reduced, and if the content of the matting agent is more than 3.0 weight percent, the coagulation phenomenon of the matting agent in the first component increases, so that yarn breakage occurs at the time of spinning, resulting in a problem that spinning operability is deteriorated. And, the second component of the present invention may include 1.0 to 3.0 weight percent of the matting agent with respect to the total weight percent, preferably, may include 1.2 to 2.5 weight percent of the matting agent, more preferably, may include 1.5 to 2.0 weight percent of the matting agent, and if the content of the matting agent is less than 1.0 weight percent, the gloss inhibiting effect may be reduced, and if the content of the matting agent is more than 3.0 weight percent, there may be a problem that the touch feeling of the fabric manufactured using the composite fiber of the present invention is reduced, and if the content of the matting agent is more than 3.0 weight percent, the coagulation phenomenon of the matting agent in the second component increases, so that yarn breakage occurs at the time of spinning, resulting in a problem that spinning operability is deteriorated.
In another aspect, the first component and the second component of the present invention may be present in a weight ratio of 30:70 to 70:30, preferably may be 35:65 to 65:35, more preferably, may be 45:55 to 55:45, if the weight ratio of the first component is less than 30 or the weight ratio of the first component is more than 70, the first component and the second component are unbalanced, the occurrence of the curved yarn becomes serious, the spinning operability becomes poor, and the drawing property of the conjugate fiber also becomes poor.
Further, the cross-sectional shape of the composite fiber of the present invention may be a peanut-shaped juxtaposition (side-by-side) or a circular juxtaposition, and preferably may be a peanut-shaped juxtaposition.
Specifically, fig. 1 is a schematic view of a juxtaposed composite fiber having a peanut-shaped cross-sectional shape according to a preferred embodiment of the invention, and fig. 2 is an SEM photograph of a juxtaposed composite fiber having a peanut-shaped cross-sectional shape according to a preferred embodiment of the invention, and referring to fig. 1 and 2, it can be confirmed that the cross-sectional shape is peanut-shaped and the composite fiber includes a first component 101 and a second component 102. Also, fig. 3 is a schematic view of a juxtaposed composite fiber having a circular cross-sectional shape according to a preferred embodiment of the invention, and fig. 4 is an SEM photograph of a juxtaposed composite fiber having a circular cross-sectional shape according to a preferred embodiment of the invention, and referring to fig. 3 and 4, it can be confirmed that the cross-sectional shape is circular and the composite fiber includes a first component 112 and a second component 113.
And, the intrinsic viscosity of the composite fiber of the present invention may be 0.50dl/g to 0.80dl/g, preferably, may be 0.60dl/g to 0.80dl/g, more preferably, may be 0.60dl/g to 0.70dl/g.
Further, the composite fiber of the present invention may have a fineness of 20 deniers to 180 deniers, preferably, may have a fineness of 30 deniers to 170 deniers, more preferably, may have a fineness of 50 deniers to 100 deniers, and may have a number of single fibers of 12 to 96, preferably, may have a number of single fibers of 20 to 60, but the present invention is not limited thereto and may be changed according to purposes.
On the other hand, the compound fiber of the present invention may have a risen sodium shrinkage (%) of 15% to 30%, preferably 17% to 25%, measured according to the following equation 1.
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82℃for 10 minutes under a load of 20.5g, drying for 3 minutes, and measuring the length (L) 1 )。
Specifically, the risen sodium shrinkage may be a percentage of the length of shrinkage after heat treatment in water at 82±3 ℃ for 10 minutes relative to the length of the original state, by applying a load of 20.5g to a drawn yarn in a lock state obtained by drawing a composite fiber with a primary godet having a speed of 1,700mpm and a temperature of 73 ℃ and a secondary godet having a speed of 4,400mpm and a temperature of 120 ℃.
Also, the residual shrinkage (%) of the composite fiber of the present invention, measured according to the following equation 2, may be 40% to 70%, and preferably, may be 47% to 63%.
[ equation 2]
In the above equation 2, in order to measure the residual shrinkage, a load of 1.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82℃for 10 minutes under a load of 1.5g, drying for 3 minutes, and measuring the length (L) 1 )。
Specifically, the residual shrinkage (Residual shrinkage) (%) may be a percentage of the length of shrinkage after heat treatment in water of 82±3 ℃ for 10 minutes relative to the length of the original state by applying a load of 1.5g to a drawn yarn in a lock state obtained by drawing a composite fiber with a primary godet having a speed of 1,700mpm and a temperature of 73 ℃ and a secondary godet having a speed of 4,400mpm and a temperature of 120 ℃.
The composite fiber of the present invention may exhibit the most excellent stretchability when satisfying the rison shrinkage (Leesona shrinkage) of 15% to 30% and the residual shrinkage of 40% to 70%, and may have a problem of reduced stretchability if the rison shrinkage is less than 15% or the residual shrinkage is less than 40%, and may have a problem of serious curling in the original filament state and serious entanglement of filaments when the rison shrinkage is more than 30% or the residual shrinkage is more than 70%, so that there may be a problem of significantly reduced process operability in the production of fabrics and knitted fabrics.
On the other hand, the method for preparing the polyester composite fiber with good stretchability of the present invention includes a first step and a second step.
Specifically, fig. 5 is a flowchart of a preparation process according to a preferred embodiment of the present invention, and referring to fig. 5, the composite fiber of the present invention may be prepared by passing through a first step (S10) of melting a first component and a second step (S11) of performing composite spinning, and further, may be passed through a cooling and solidifying step (S12), an oiling agent supplying step (S13) and a heat setting and stretching step (S14) after spinning.
First, in the first step of the method for producing a polyester composite fiber having good stretchability of the present invention, the first component and the second component may be melted, respectively. In this case, the first component may include polybutylene terephthalate (PBT), and may further include a matting agent. And, the second component may include polyethylene terephthalate (PET), and may further include a matting agent.
And, the composite fiber produced may be a side-by-side composite fiber having an intrinsic viscosity of 0.60dl/g to 0.80dl/g.
And, the manufactured composite fiber may have a risen sodium shrinkage (%) of 15% to 30% as measured according to the following equation 1.
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82℃for 10 minutes under a load of 20.5g, drying for 3 minutes, and measuring the length (L) 1 )。
Further, the following relational expression 1 may be satisfied. If the amount exceeds the range described in the following relation 1, there is a possibility that the expansion and contraction properties of the composite fiber to be produced are expressed little.
[ relation 1]
0.30 dl/g.ltoreq.A-B.ltoreq.0.80 dl/g, preferably 0.4 dl/g.ltoreq.A-B.ltoreq.0.70 dl/g, more preferably 0.4 dl/g.ltoreq.A-B.ltoreq.0.60 dl/g, even more preferably 0.45 dl/g.ltoreq.A-B.ltoreq.0.53 dl/g, most preferably 0.45 dl/g.ltoreq.A-B.ltoreq.0.49 dl/g
In the above relation 1, a represents the intrinsic viscosity of the first component, and B represents the intrinsic viscosity of the second component.
For reference, fig. 6 is a schematic view of a preparation process according to a preferred embodiment of the present invention, in which the first component 10 and the second component 20 may be melted at a melting portion.
Next, in the second step of the method for producing a polyester composite fiber having good stretchability of the present invention, the first component and the second component melted in the first step may be subjected to composite spinning to produce a polyester composite fiber.
At this time, as the composite spinning in the second step, 30:70 to 70:30, preferably the spinning temperature may be 250 ℃ to 300 ℃, more preferably 260 ℃ to 280 ℃, and the spinning speed may be 3000mpm to 4500mpm.
On the other hand, the composite spinning of the second step may be performed by spinnerets of various shapes, and preferably, a composite fiber having a peanut-shaped or circular juxtaposed shape in cross section may be prepared by a juxtaposed spinneret having a peanut-shaped or circular cross-sectional shape.
Further, after the second step, the composite fiber subjected to the composite spinning is subjected to a cooling and solidifying process (40 of fig. 6) at a cooling air temperature of 15 ℃ to 25 ℃ and a speed of 25mpm to 50 mpm. When the amount exceeds the above range, control of the cross-sectional shape of the composite fiber is difficult to control, and uniformity cannot be improved.
Secondly, an oiling agent can be provided for smooth spinning and winding. As for the oil supply, a spray method or an oil roller method may be used in the guide (50 in fig. 6) provided in the curing region, and either one of the two methods may be used.
Further, after the oil solution is supplied, a partial stretching step or a stretching step may be further included. The fiber orientation is improved by a partial stretching or drawing process, whereby a fiber having higher strength can be obtained.
The following will specifically explain based on the two rolls (primary godet 60, secondary godet 70) of fig. 6.
The partial stretching may be performed at a first godet speed of 2,000mpm to 3,500mpm and a second godet speed of 2,000mpm to 3,500 mpm.
In addition, in the case of the above-described stretching process, specifically, the primary godet speed may be 1,000mpm to 2,500mpm, and preferably, may be 1,400mpm to 2,000mpm. If the speed of the primary godet is less than 1,000mpm, there is a problem that physical properties are deteriorated with the change of the raw yarn with time, and the spinning tension is low due to the low speed of the primary godet, and there is a possibility that yarn breakage occurs in many cases. If the speed of the primary godet is greater than 2,500mpm, there is a possibility that dyeing defects may be caused by uneven stretching. The temperature of the primary godet may be 50 to 100 ℃, and preferably, may be 70 to 80 ℃.
Second, the secondary godet speed may be 3,000mpm to 5,000mpm, and in view of spinning operability, it is preferable that the secondary godet speed be 3,500mpm to 4,500mpm. If the speed of the secondary godet is less than 3,000mpm, the physical properties of the spun yarn, particularly elongation, are lowered, and productivity is lowered. If the speed of the secondary godet is higher than 5,000mpm, severe yarn breakage may occur in the secondary godet due to severe yarn vibration. The temperature of the secondary godet may be 90 to 150 ℃, preferably 110 to 130 ℃. If the heat-setting temperature of the secondary godet is lower than 90 ℃, there is a possibility that physical properties such as elongation change with time and the like are changed to a high shrinkage yarn, and then the yarn may be excessively shrunk when the fabric is dyed, and if the heat-setting temperature of the secondary godet is higher than 150 ℃, there is a possibility that stable operation is difficult to achieve due to severe yarn vibration occurring in the secondary godet.
On the other hand, the composite fiber produced by the production method of the present invention may have a full-lap ratio (%) of 80% or more, preferably 85% or more, more preferably 90% to 99.9%, as measured according to the following equation 3, and the higher the full-lap ratio, the more excellent the spinning operability.
[ equation 3]
As described above, the composite fiber of the present invention has excellent spinning operability even if two (first component and second component) components having different inherent viscosities are composite-spun.
The invention also provides a fabric comprising the polyester fiber with good stretchability.
The above-mentioned fabrics as the term used in the present invention are meant to include all the meanings of woven or knit fabrics.
First, the fabric may be a fabric woven (woven) using the polyester composite fiber having good stretchability according to the present invention as one or more of warp and weft.
The weaving may be performed by one method selected from the group consisting of plain weave, twill weave, satin weave, and double layer weave.
However, the present invention is not limited to the description of the above-described fabric structure, and the densities of warp and weft during weaving are not particularly limited.
Also, the above-mentioned fabric may be a braid woven (knitting) by including polyester fiber having good stretchability. The knitting may be performed by a weft knitting or warp knitting method, and the specific method of weft knitting and warp knitting may be performed by a usual weft knitting or warp knitting method.
Although the present invention has been described mainly with reference to the embodiments, these are merely illustrative and not restrictive, and various modifications and applications not mentioned above may be made by those skilled in the art to which the present invention pertains without departing from the essential characteristics of the present embodiment. For example, each component specifically appearing in the embodiment of the present invention can be modified. Also, differences relating to these variations and modifications fall within the spirit and scope of the present invention as defined in the appended claims.
Example 1: preparation of polyester composite fiber
(1) As a first component, a composition comprising 1.5 weight percent of titanium oxide (TiO 2 ) Polybutylene terephthalate (PBT). At this time, the first component had a melting point of 223℃and an intrinsic viscosity of 0.98 dl/g.
And, as a second component, titanium oxide (TiO 2 ) Polyethylene terephthalate (PET). At this time, the second component had a melting point of 254℃and an intrinsic viscosity of 0.50 dl/g.
(2) The composite spinning was performed by setting the melting temperature of the first component prepared for preparing the composite fiber to 270 ℃, the melting temperature of the second component prepared to 275 ℃, and the spinning temperature to 272 ℃, and at this time, the discharge weight ratio of the first component and the second component was set to 50:50. the primary godet for drawing had a speed of 1,700mpm and a temperature of 73 c, and the secondary godet had a speed of 4,400mpm and a temperature of 120 c, and were wound at a winding speed of 4,340mpm, thereby producing polyester composite fibers having a peanut-shaped side-by-side cross-sectional shape, which had a fineness of 75 deniers, a number of single fibers of 24, and comprised 1.65% of titanium oxide with respect to the total weight percentage, as shown in table 1 below.
Example 2: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 220℃and an intrinsic viscosity of 0.90dl/g was used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g to prepare a polyester conjugate fiber.
Example 3: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, unlike example 1, the weight ratio of the first component to the second component discharged was not 50:50, but 60:40, thereby preparing the polyester composite fiber.
Example 4: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, unlike example 1, the weight ratio of the first component to the second component discharged was not 50:50, but 40:60, thereby preparing the polyester composite fiber.
Example 5: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, unlike example 1, a polyester composite fiber having a peanut-shaped juxtaposed cross-sectional shape, which had a fineness of 40 deniers, a number of single fibers of 24, and included 1.65% of titanium oxide with respect to the total weight percentage, was prepared, instead of a polyester composite fiber having a peanut-shaped juxtaposed cross-sectional shape, which had a fineness of 75 deniers, a number of single fibers of 24, and included 1.65% of titanium oxide with respect to the total weight percentage.
Example 6: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, unlike example 1, a polyester composite fiber having a circular juxtaposed cross-sectional shape, which had a fineness of 40 deniers, a number of single fibers of 24, and included 1.65% of titanium oxide with respect to the total weight percentage, was prepared, instead of a polyester composite fiber having a peanut juxtaposed cross-sectional shape, which had a fineness of 75 deniers, a number of single fibers of 24, and included 1.65% of titanium oxide with respect to the total weight percentage.
Example 7: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 223℃and an intrinsic viscosity of 1.10dl/g and a second component having a melting point of 254℃and an intrinsic viscosity of 0.55dl/g are used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g and the second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g to prepare a polyester conjugate fiber.
Example 8: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 223℃and an intrinsic viscosity of 1.20dl/g and a second component having a melting point of 254℃and an intrinsic viscosity of 0.70dl/g are used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g and the second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g to prepare a polyester conjugate fiber.
Comparative example 1: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 223℃and an intrinsic viscosity of 0.75dl/g and a second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g are used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g and the second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g to prepare a polyester conjugate fiber.
Comparative example 2: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 223℃and an intrinsic viscosity of 0.85dl/g and a second component having a melting point of 254℃and an intrinsic viscosity of 0.65dl/g are used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g and the second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g to prepare a polyester conjugate fiber.
Comparative example 3: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 223℃and an intrinsic viscosity of 1.35dl/g and a second component having a melting point of 254℃and an intrinsic viscosity of 0.35dl/g are used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g and the second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g to prepare a polyester conjugate fiber.
Comparative example 4: preparation of polyester composite fiber
A polyester conjugate fiber was prepared in the same manner as in example 1. However, the difference from example 1 is that a first component having a melting point of 223℃and an intrinsic viscosity of 1.60dl/g and a second component having a melting point of 254℃and an intrinsic viscosity of 0.75dl/g are used instead of the first component having a melting point of 223℃and an intrinsic viscosity of 0.98dl/g and the second component having a melting point of 254℃and an intrinsic viscosity of 0.5dl/g to prepare a polyester conjugate fiber.
Experimental example 1: determination of physical Properties of polyester Complex fibers
The following experiments were performed on the polyester composite fibers prepared in examples 1 to 8 and comparative examples 1 to 4, respectively, and the results thus obtained are shown in tables 1 to 3 below.
1. Determination of Strength and elongation
The measurement was performed using an automatic tensile tester (Textechno, germany) at a speed of 200cm/min with a holding distance of 50 cm. The strength and elongation are defined as follows: the value (g/de) obtained by dividing the load of the composite fiber when the composite fiber is stretched until cut by Denier (Denier) is defined as the strength, and the value (%) expressed as a percentage with respect to the initial length of the stretched length is defined as the elongation.
2. Measurement of spinning operability
In order to evaluate the spinning operability, the measurement was carried out by the full-lap ratio (%) which is the yield of the polyester composite fiber without yarn breakage when spinning with 8kg reels of the polyester composite fiber prepared in each of examples and comparative examples as full lap, and was measured according to the following equation 3:
[ equation 3]
3. Lison shrinkage (Leesona shrinkage,%) and residual shrinkage (Residual shrinkage,%) measurements
The shrinkage and residual shrinkage of the risen sodium were determined according to the following equations 1, 2.
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length (L 0 ) At 20.5g ofImmersing in hot water at 82+ -3deg.C for 10 min under load, drying for 3 min, and measuring the length (L) 1 )。
[ equation 2]
/>
In the above equation 2, in order to measure the residual shrinkage, a load of 1.5g was applied to the composite fiber and the initial length (L 0 ) Immersing in hot water at 82.+ -. 3 ℃ for 10 minutes under a load of 1.5g, drying for 3 minutes, and measuring the length (L) 1 )。
TABLE 1
As can be seen from table 1, the polyester composite fibers prepared in examples 1 to 4 have excellent full lap, rison shrinkage and residual shrinkage at the same time, and thus it can be confirmed that both spinning operability and stretchability are excellent. Further, it can be seen that the full-lap ratio of the polyester composite fibers prepared in examples 3 to 4 was slightly reduced as compared with the polyester composite fibers prepared in examples 1 to 2, and it was confirmed that the weight ratio between the first component and the second component was 50: the spinning operability was most excellent at 50.
TABLE 2
/>
Next, referring to Table 2 above, in the case of example 5, it was confirmed that the elongation was significantly lowered due to the difference in fineness of the conjugate fiber as compared with example 1.
In the case of example 6, the fineness of the conjugate fiber was different from that of example 1, and the cross-sectional shape was circular, so that the strength was slightly lowered, and it was confirmed that the rison shrinkage and residual shrinkage were lowered.
Further, in the case of examples 7, 8, both the rison shrinkage and the residual shrinkage were exhibited at satisfactory levels, but the full roll rate was slightly reduced as compared with examples 1 to 4 because the difference in intrinsic viscosity between the first component and the second component was large.
TABLE 3 Table 3
Next, referring to the above Table 3, it was confirmed that when the difference in intrinsic viscosity between the two components was less than 0.30dl/g to 0.80dl/g as the target intrinsic viscosity difference as in comparative examples 1 and 2, the stretchability was remarkably low.
On the other hand, it was confirmed that when the difference in intrinsic viscosity between the first component and the second component was higher than 0.30dl/g to 0.80dl/g as the target intrinsic viscosity difference as in comparative example 3, the level of the curved yarn occurred at the time of the composite spinning was serious, resulting in considerably deteriorated spinning operability and the full-lap rate was lowered to 30% level.
On the other hand, it was found that when the difference in intrinsic viscosity between the first component and the second component was higher than 0.30dl/g to 0.80dl/g, which is the target difference in intrinsic viscosity, as in comparative example 4, the level of the curved filaments occurring at the time of composite spinning was severe, resulting in considerable deterioration of spinning operability, the full-lap ratio was lowered to 40%, and when the intrinsic viscosity of the second component was high, the stretching characteristics were also lowered.
Simple modifications and variations of the invention may be readily implemented by those skilled in the art, and such modifications and variations are intended to be within the scope of the invention.
Industrial applicability
The present invention relates to a polyester conjugate fiber having excellent stretchability and a method for producing the same, and more particularly, to a polyester conjugate fiber having further improved stretchability, no gloss, and excellent touch feeling and a method for producing the same.
Claims (6)
1. A polyester composite fiber having good stretchability, which is a polyester composite fiber produced by composite spinning a first component and a second component, the polyester composite fiber being characterized in that the composite fiber is a side-by-side composite fiber having an intrinsic viscosity of 0.60dl/g to 0.80dl/g, and the rison shrinkage ratio measured by the following equation 1 is 15% to 30%:
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length L was measured 0 Immersing in hot water at 82℃for 10 minutes under a load of 20.5g, drying for 3 minutes, and measuring the length L after the treatment 1 ，
Wherein the first component comprises polybutylene terephthalate and the second component comprises polyethylene terephthalate,
wherein the composite fiber satisfies the following relation 1:
[ relation 1]
0.4dl/g≤|A-B|≤0.49dl/g
In the above-mentioned relation 1, A represents the intrinsic viscosity of the first component, B represents the intrinsic viscosity of the second component,
wherein the above-mentioned composite fiber has a fineness of 50 denier to 100 denier and a number of single fibers of 20 to 60,
wherein the first component and the second component each independently comprise 1.5 to 2.0 weight percent of matting agent relative to the total weight percent.
2. A polyester conjugate fiber having excellent stretchability as claimed in claim 1,
the residual shrinkage of the above composite fiber is 40% to 70% as determined according to the following equation 2:
[ equation 2]
In the above equation 2, in order to measure the residual shrinkage, a load of 1.5g was applied to the composite fiber and the initial length L was measured 0 Immersing in hot water at 82℃for 10 minutes under a load of 1.5g, drying for 3 minutes, and measuring the length L after the treatment 1 。
3. The polyester composite fiber having excellent stretchability as claimed in claim 1, wherein the composite fiber has a peanut-shaped cross-sectional shape.
4. The polyester composite fiber having excellent stretchability as claimed in claim 1, wherein the matting agent comprises at least one member selected from the group consisting of titanium oxide, zinc oxide, silicon oxide and barium sulfate.
5. The preparation method of the polyester composite fiber with good elasticity is characterized by comprising the following steps:
a first step of melting the first component and the second component, respectively; a kind of electronic device with high-pressure air-conditioning system
A second step of preparing a polyester composite fiber by composite spinning the molten first component and the molten second component,
the composite fiber prepared is a side-by-side composite fiber having an intrinsic viscosity of 0.60dl/g to 0.80dl/g,
the manufactured composite fiber has a risen sodium shrinkage of 15% to 30% measured according to the following equation 1:
[ equation 1]
In the above equation 1, in order to measure the above Lison shrinkage, a load of 20.5g was applied to the composite fiber and the initial length L was measured 0 Immersing in hot water at 82℃for 10 minutes under a load of 20.5g, drying for 3 minutes, and measuring the length L after the treatment 1 ，
Wherein the first component comprises polybutylene terephthalate and the second component comprises polyethylene terephthalate,
wherein the composite fiber satisfies the following relation 1:
[ relation 1]
0.4dl/g≤|A-B|≤0.49dl/g
In the above-mentioned relation 1, A represents the intrinsic viscosity of the first component, B represents the intrinsic viscosity of the second component,
wherein the above-mentioned composite fiber has a fineness of 50 denier to 100 denier and a number of single fibers of 20 to 60,
wherein the first component and the second component each independently comprise 1.5 to 2.0 weight percent of matting agent relative to the total weight percent.
6. The method for producing a polyester composite fiber having good stretchability as claimed in claim 5, characterized in that,
the composite fiber has a full lap ratio of 80% or more as measured by the following equation 3,
[ equation 3]
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| CN101851812A (en) * | 2009-12-18 | 2010-10-06 | 东丽纤维研究所（中国）有限公司 | Parallel composite elastic fiber and manufacture method thereof |
| KR20130131001A (en) * | 2012-05-23 | 2013-12-03 | 웅진케미칼 주식회사 | Flame-retardant recycled low melting polyester fiber |
| KR20160119915A (en) * | 2015-04-06 | 2016-10-17 | 주식회사 휴비스 | Polyester Complex Hollow Fiber And Warmth Filler Using That |
| KR20170010167A (en) * | 2015-07-15 | 2017-01-26 | 주식회사 휴비스 | The Manufacturing Method For Good Bulky Polyester Complex Hollow Fiber And Warmth Filler Using That |
| CN108138379A (en) * | 2016-05-23 | 2018-06-08 | 东丽纤维研究所（中国）有限公司 | A kind of parallel composite fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020246719A1 (en) | 2020-12-10 |
| CN114008255A (en) | 2022-02-01 |
| JP2022536095A (en) | 2022-08-12 |
| KR20220004930A (en) | 2022-01-12 |
| JP7320081B2 (en) | 2023-08-02 |
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