KR101651896B1 - Sheath-core Type Polyester Fiber Reducing Infrared Transmittance, and Method for Manufacturing the Same - Google Patents
Sheath-core Type Polyester Fiber Reducing Infrared Transmittance, and Method for Manufacturing the Same Download PDFInfo
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- KR101651896B1 KR101651896B1 KR1020150083136A KR20150083136A KR101651896B1 KR 101651896 B1 KR101651896 B1 KR 101651896B1 KR 1020150083136 A KR1020150083136 A KR 1020150083136A KR 20150083136 A KR20150083136 A KR 20150083136A KR 101651896 B1 KR101651896 B1 KR 101651896B1
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- tin oxide
- polyester
- antimony tin
- sheath
- core
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- 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
- D01D5/34—Core-skin structure; 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
Abstract
Description
The present invention relates to a cis-core type optical fiber which can form a cis portion with a polyester resin kneaded with antimony tin oxide (ATO) and form a core portion with a general polyester resin, A method for producing the composite fiber, and a composite fiber produced by the method.
Background Art [0002] Polyester resins are polymers having an ester bond in the main chain of molecules, and are excellent in physical properties and chemical properties and relatively inexpensive, and are widely used as materials for optical, industrial and various clothes.
When a polyester is applied to a garment material, various functions are required depending on its use. Among these functions, a function of intercepting heat from an external heat source such as sunlight and feeling a refreshing feeling when wearing it is considered to be important.
Solar energy consists of approximately 6% ultraviolet light, 46% visible light and 48% infrared light, among which the wavelength bands causing heat are mainly in the infrared region, giving polyester fiber products the ability to absorb or shield heat In order to be able to block the sun's infrared rays.
As a method of imparting an infrared ray blocking function to a fiber, a method of forming a thin film by depositing indium tin oxide (ITO) by physical or chemical methods, or forming a thin film by using an azo compound, a triphenylmethane- There is known a method for producing a polyester raw material in which an antimony tin oxide powder is incorporated by using a pigment such as a ninety-one or by a polymerization technique.
However, a method of depositing indium oxide requires a high-cost sputtering apparatus that requires high-vacuum and high-precision atmospheric control, which is expensive to manufacture and has a problem in productivity. The method using a dye can absorb infrared rays in a specific wavelength band, The infrared ray shielding effect can not be expected in a wide range of 2500 nm and there is a problem that the color changes due to ultraviolet rays, heat, humidity and the like and the infrared absorption performance deteriorates.
As a result, antimony tin oxide, which is an inorganic material that absorbs or reflects infrared rays and exhibits a broad infrared ray blocking effect, is mixed at the time of polyester polymerization, or antimony tin oxide is kneaded with a polyester resin that has been polymerized, A method of shielding infrared rays through a method of forming an antimony tin oxide coating layer has been developed.
The antimony tin oxide is prepared by incorporating antimony oxide in the main component tin oxide. The method of mixing the antimony tin oxide in the polyester polymerization is a method in which the dispersibility of the antimony tin oxide as the inorganic particle is low and the metal ion and the ester of the antimony tin oxide The stability of the polymer tends to be poor due to the reaction, so that the mixing amount of the antimony tin oxide is limited. Therefore, the addition of the antimony tin oxide has a limitation on the infrared blocking effect.
The method of kneading the antimony tin oxide with the polyester resin is disadvantageous in that it is difficult to obtain a mixture in which the antimony tin oxide, which is an inorganic substance, is uniformly dispersed in the polymer having a low affinity between the polymer and the antimony tin oxide due to the viscosity of the polymer, .
In addition, the method of forming the antimony tin oxide coating layer has a disadvantage in that the infrared absorption effect is high, but the productivity is low and the manufacturing cost is high, causing glare by reflecting sunlight, and coloring of the fiber product due to inherent color of antimony tin oxide have.
Korean Patent Registration No. 1306579 discloses a method for producing a polyester in which fine powder of antimony tin oxide in a finely divided state is mixed in the polyester synthesis step to exhibit excellent dispersibility.
The polyester of the present invention is obtained by subjecting an antimony tin oxide powder having an average particle size of 5 to 100 nm to a surface treatment step of impregnating with a lower alcohol having 1 to 4 carbon atoms and separating and drying the same and then adding 0.5 to 10% The antimony tin oxide powder is dispersed well in the raw material mixture by improving the wettability of the antimony tin oxide powder by allowing the lower alcohol in the surface treatment step to function as a surfactant.
However, since the lower alcohol of the present invention is removed from the antimony tin oxide powder during the drying process, it can not act as a surfactant. When the surfactant is added to the polycondensation process without drying to serve as a surfactant, the alcohol reacts with the ester There is a problem that a polyester polymer having desired physical properties can not be obtained.
Further, since the antimony tin oxide is very expensive, when the content of the antimony tin oxide is high in the polyester, there is a problem that the manufacturing cost is increased and the infrared blocking effect is not sufficient when the antimony tin oxide is contained at a low content.
In order to solve this problem, Korean Patent Laid-Open Publication No. 2015-0010763 discloses an antimony tin oxide and an antimony tin oxide which are improved in crystallinity and improved infrared absorption effect and the antimony tin oxide are dissolved in a varnish and applied to a substrate, A method has been proposed that can improve the performance of the system.
The above-mentioned antimony tin oxide has a half width (? 2?) Of about 0.35 or less and a content of antimony oxide of 0.5 to 10.0% by weight in the vicinity of 2? = 27 degrees obtained by X-ray diffraction measurement, The obtained antimony tin oxide having such a crystal has a crystallization degree of 18092 or more, which is a value obtained by dividing the peak value of the peak near 2? = 27 占 by the half width (? 2?), And the antimony tin oxide having such a crystal is excellent in infrared absorption effect, .
However, the antimony tin oxide of the present invention can be produced by a method including a raw material mixing step, a first drying step, a first pulverization step, a closed firing step, a closed cooling step, a first pulverization step, a second drying step, a second pulverization step, The antimony tin oxide produced and produced through various processes such as the air cooling step, the second pulverization step, the cleaning step, the third drying step, and the finishing milling step can be carried out by measuring the degree of crystallization through X- There is a problem in that it is not economically feasible to obtain the infrared ray shielding effect of the fiber by using the antimony tin oxide produced by this method.
Disclosure of the Invention The present invention has been made to solve the above problems, and it is an object of the present invention to provide a polyester fiber which is capable of uniformly dispersing antimony tin oxide in a polymerized polyester resin to reduce the amount of antimony tin oxide used, And a method for producing the same.
In order to solve the above-mentioned problems, the present invention provides a method for producing a polyester resin composition, comprising: adding and kneading 3 to 10% by weight of antimony tin oxide to 90 to 97% by weight of polyester having an intrinsic viscosity of 0.8 to 0.9; Composite spinning the polyester with the antimony tin oxide-blended polyester as a sheath and using a general polyester having an intrinsic viscosity of 0.6 to 0.8 as a core part; And preparing a cis-core type fiber by combining the composite spinning filaments, wherein the antimony tin oxide is coated with a polyester of the same kind as the polyester constituting the sheath portion and having an intrinsic viscosity of 0.3 to 0.5 Wherein the sheath-core type fiber is a composite yarn having 24 to 48 strands of a monofilament composed of 40 to 60 wt% of a sheath portion and 40 to 60 wt% of a core portion and having a total fineness of 30 to 150 denier. A method of producing a cis-core type polyester fiber for reducing an infrared transmittance is provided.
The present invention also relates to a polyester resin composition comprising 90 to 97% by weight of polyester, 3 to 10% by weight of a sheath portion of antimony tin oxide dispersed therein, and a core portion comprising a general polyester having an intrinsic viscosity of 0.6 to 0.8, Core type monofilaments, wherein the antimony tin oxide is coated with a polyester of the same kind as the polyester constituting the sheath portion and having an intrinsic viscosity of 0.3 to 0.5, Wherein the monofilament is composed of 24 to 48 strands to provide a cis-core type polyester fiber having a total fineness of 30 to 150 denier.
The cis-core type polyester fiber according to the present invention uses the antimony tin oxide only in the outer sheath portion which is effective for separating the structure of the fiber into the sheath portion and the core portion and reducing the infrared transmittance, The infrared ray transmittance is effectively reduced, so that the infrared ray blocking effect can be obtained at a low cost.
Further, since the antimony tin oxide is kneaded after the ester polymerization, the physical properties of the polyester are maintained as compared with the fibers polymerized after the addition of the antimony tin oxide, and the flexibility and color development And the antimony tin oxide can be uniformly dispersed in the polyester resin, so that there is no problem of cutting or surface defects.
Fig. 1 is a test report showing the result of measuring the solar radiation transmittance of a cis-core type polyester twist yarn of the present invention, commissioned by the Korea Research Institute of Glass Industry.
In the present invention, antimony tin oxide, which is an inorganic substance having a function of absorbing or reflecting infrared rays, is kneaded so as to be uniformly dispersed in a polymerized polyester resin to form a sheath portion of the sheath- Core type polyester resin which does not contain an antimony tin oxide and forms a core portion to absorb or reflect infrared rays causing a heat action to reduce the solar radiation transmittance and to manufacture a cis-core type polyester conjugate fiber at a low cost .
The antimony tin oxide refers to antimony-doped tin oxide which is mainly composed of antimony and tin oxides and is mainly doped with antimony. The antimony component penetrates into the crystal lattice of the main tin oxide, Absorbing crystal structure, and is inexpensive as compared with indium tin oxide, which is an infrared ray shielding material, and has properties such as high temperature resistance, anti-corrosiveness, dispersibility and mechanical stability.
However, even if the antimony tin oxide is added to the fiber to obtain an infrared shielding effect, there is a disadvantage in that the cost of the fiber is high because the antimony tin oxide is expensive and the economical efficiency is low.
In order to solve such a disadvantage, in the present invention, the fiber form is constituted of a cis-core type and the antimony tin oxide is mixed only with the resin constituting the sheath portion, thereby enhancing the antimony tin oxide content of the sheath portion, Thereby reducing the production cost of the antimony tin oxide.
The polyester resin forming the sheath portion is prepared by adding and kneading 3 to 10% by weight of antimony tin oxide to 90 to 97% by weight of polyester having an intrinsic viscosity (IV) of 0.8 to 0.9, and has an intrinsic viscosity of 0.8 to 0.9 Of antimony tin oxide is added to 92 to 94% by weight of the polyester.
If the addition amount of the antimony tin oxide is less than 3 wt%, the infrared blocking effect of the polyester fiber mixed with the antimony tin oxide is not sufficient. If the content exceeds 10 wt%, the antimony tin oxide is not uniformly dispersed during the kneading, And the viscosity of the fiber may be reduced during spinning, and the increase rate of the infrared blocking effect to the increase rate of the antimony tin oxide content, which is expensive, is undesirably low.
The antimony tin oxide is preferably a powder having an average particle diameter of 10 to 500 nm. When the diameter is less than 5 nm, the powder is too fine to be pulverized, and when the diameter is more than 500 nm, There is a problem that cuts occur or cause defects in the fibers.
In general, the inorganic particles such as antimony tin oxide may not be uniformly dispersed in the resin due to low affinity with the polyester resin, which may result in deterioration of the infrared blocking effect by the antimony tin oxide and may result in cutting and failure of the fibers .
Therefore, in order to uniformly disperse the antimony tin oxide in the polyester, a resin having the same kind as that of the polyester (hereinafter referred to as "cis-polyester") and having a low intrinsic viscosity (hereinafter referred to as " ), Followed by kneading with the cis-polyester.
The dispersion of the inorganic particles is related to the affinity with the resin and the affinity is related to the viscosity of the resin, the cohesive force, the shape of the inorganic particles and the difference in the surface tension of the inorganic particles and the resin. In general, When the material having high acidity and having high affinity with the resin on the surface of the inorganic particles is coated, the dispersibility is improved.
Therefore, when the surface of the antimony tin oxide particles is coated with the coupling polyester of the same kind as the cis-polyester and kneaded with the cis-polyester, the antimony tin oxide particles can be more uniformly dispersed in the cis- In order that the antimony tin oxide particles can be easily dispersed in the coupling polyester, the coupling polyester preferably has a low intrinsic viscosity, more preferably 0.5 or less, and most preferably 0.3 to 0.5.
As described above, when the antimony tin oxide particles are mixed with the coupling polyester having a low intrinsic viscosity and then mixed with the cis-polyester having a high intrinsic viscosity, the dispersion degree of the antimony tin oxide particles dispersed in the high viscosity cis- The antimony tin oxide particles coated with the low-viscosity coupling polyester are dispersed in the cis-poly polyester so that the antimony tin oxide particles can be uniformly dispersed in the cis-polyester, It is possible to prevent the cutting of the fibers and the surface defects during spinning.
It is preferable to minimize the amount of the coupling polyester to be mixed with the antimony tin oxide in order to suppress the change in intrinsic viscosity of the sheath polyester by the coupling polyester having a low intrinsic viscosity and the antimony tin oxide: = 100: 80 to 120 weight ratio.
The polyester resin forming the core portion is adjusted so as to have an intrinsic viscosity similar to that of the polyester in the sheath portion to improve the interfacial adhesion between the sheath portion and the core portion and maintain the same shrinkage and expansion ratio. It is preferable to prevent warping of the fibers.
The polyester of the sheath is thermally decomposed in the kneading process and the intrinsic viscosity is slightly lowered so that adjusting the intrinsic viscosity of the polyester forming the core portion to 0.6 to 0.8 is similar to the intrinsic viscosity of the sheath portion lowered by kneading .
When the polyester resin of the sheath portion and the core portion is prepared, the resulting polyester resin is supplied to an extruder and co-spun through a cis-core type spinneret. The polyester resin in which antimony tin oxide is kneaded is mixed with a sheath portion, A cis-core type polyester conjugate fiber in which a general polyester resin is placed in the core portion is produced.
The composition ratio of the sheath portion and the core portion of the sheath-core type fiber is preferably 40 to 60 wt% of the sheath portion and 40 to 60 wt% of the core portion, more preferably 50 to 60 wt% of the sheath portion and 40 to 50 wt% It is most preferable that the sheath portion and the core portion are formed at the same weight ratio. If the cis portion is less than 40 wt%, the solar radiation transmittance increases. If the cis portion is more than 60 wt%, the amount of antimony tin oxide is large And the manufacturing cost is increased.
The temperature at the time of spinning is suitably from 285 to 295 ° C at which all of the polyester can be melted and is wound on a winder after passing through a godet roller after spinning. The total sum of the filaments is 30 to 150 deniers and the number of filaments is 24 to 48, In view of maintaining the strength of the fiber while increasing the breaking performance.
Since the cis-core type polyester fiber produced as described above is kneaded with the antimony tin oxide in the polymerized polyester resin, the physical and chemical properties of the polyester resin due to the antimony tin oxide are not lowered, Since it is not coated on the surface, the flexibility of the fiber is maintained and there is no restriction on color development.
Hereinafter, the present invention will be described in more detail with reference to the following examples.
It is to be understood, however, that the invention is not to be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Will be apparent to those skilled in the art to which the present invention pertains.
<Examples>
Antimony tin oxide (ATO) was mixed with poly ethylene terephthalate having an intrinsic viscosity of 0.85 in the proportions shown in Table 1 below and kneaded using a twin-screw extruder (TEK25, SM Platek, Korea) , the feeder speed was 100 rpm, and the screw speed was 10 rpm.
The kneaded antimony tin oxide-containing polyethylene terephthalate was put into a core part with a general polyester having an intrinsic viscosity of 0.7, and melt-spun at a spinneret temperature of 290 DEG C to obtain a cis-core type polyester monofilament. Through the spinning spinning, a composite polyester yarn in which a sheath portion and a core portion were formed as shown in Table 1 was produced.
(Weight ratio)
The sis-core type polyester twist yarn prepared above was subjected to the solar radiation transmittance measurement by the Korea Research Institute of Technology, Ltd. The results are shown in FIG.
The measurement was carried out according to the method of measuring the spectral transmittance and the spectral reflectance of the test method of KS L 2514: 2011 and measured using a UV-VIS-NIR spectrophotometer (Perkin-Elmer, USA) The test was conducted at a temperature of 21 to 25 ° C and a relative humidity of 60 to 65%.
1, samples 1, 2 and 9, which did not contain ATO, had a solar light transmittance of more than 40%, but samples 3 to 8 containing ATO had a solar light transmittance of less than 40% .
Analysis of a sample containing ATO showed that the solar light transmittance was less than 40% when the ATO content of the sheath was more than 3 wt%, but the solar light transmittance of the sample 6 containing 6.0 wt% of the ATO of the sheath was 33.80% Samples 3, 4 and 5 containing 3, 4 and 5% by weight of ATO in the sheath were 36.70%, 35.98% and 36.45%, respectively. The ATO content of the cis is more than 6.0 wt% It can be seen that it is effective.
In addition, when the solar transmittances of the samples 6 and 7 having the total ATO content of 3.0 wt% are compared, it is found that the solar light transmittance of the sample 6 composed of 50 wt% of the sheath portion and the core portion of 33 wt% Sample 7 consisting of 40 wt.% And 60 wt.% Of the additive was increased to 38.33%, so that the sheath portion containing ATO was formed more than the core portion not containing ATO, It can be seen that the transmittance can be lowered.
When the solar transmittances of Samples 6 and 8 containing 6.0% by weight of ATO of the sheath and 50% by weight of the sheath portion and the core portion of 50% by weight respectively are compared, the sample 6 of DTY 75/36 is 33.80% Of sample 8 was found to be 22.61%, which means that the larger the fineness, the lower the solar light transmittance.
As described above, since the cis-core type polyester fiber of the present invention uses antimony tin oxide only in the sheath portion effective for reducing the infrared transmittance, the infrared transmittance can be effectively reduced even if a small amount of expensive antimony tin oxide is used.
Claims (7)
Composite spinning the polyester with the antimony tin oxide-blended polyester as a sheath and using a general polyester having an intrinsic viscosity of 0.6 to 0.8 as a core part; And
Preparing a cis-core type fiber by combining the composite yarn filament,
Wherein the antimony tin oxide is coated with a polyester of the same kind as the polyester constituting the sheath portion and having an intrinsic viscosity of 0.3 to 0.5,
Wherein the sheath-core type fiber is a composite yarn having 24 to 48 strands of a monofilament composed of 40 to 60 wt% of a sheath portion and 40 to 60 wt% of a core portion and having a total fineness of 30 to 150 denier. A method for producing a cis-core type polyester fiber which reduces the transmittance.
Wherein the antimony tin oxide is a powder having an average particle diameter of 10 to 500 nm.
Wherein said coating is coated with 100 parts by weight of antimony tin oxide mixed with 80 to 120 parts by weight of polyester having an intrinsic viscosity of 0.3 to 0.5 parts by weight.
Wherein said coating is coated with 80 to 120 parts by weight of polyester having an intrinsic viscosity of 0.3 to 0.5 by weight to 100 parts by weight of antimony tin oxide.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150083136A KR101651896B1 (en) | 2015-06-12 | 2015-06-12 | Sheath-core Type Polyester Fiber Reducing Infrared Transmittance, and Method for Manufacturing the Same |
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| KR1020150083136A KR101651896B1 (en) | 2015-06-12 | 2015-06-12 | Sheath-core Type Polyester Fiber Reducing Infrared Transmittance, and Method for Manufacturing the Same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101976591B1 (en) | 2018-01-16 | 2019-05-10 | 주식회사 아모그린텍 | Nanofiber Membrane for Shielding Infrared Ray and Complex Fabric for Shielding Infrared Ray Using the Same |
| KR20190100647A (en) | 2018-02-21 | 2019-08-29 | 주식회사 녹수텍스테리어 | Superior See-Through and low heat gain Sunscreen Fabrics with Coated Yarn Containing Organic/Inorganic Hybrid Coating Layer and The Preparation Method Thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06200404A (en) * | 1992-12-28 | 1994-07-19 | Unitika Ltd | Rapidly dryable swimming suit |
| JP2009041137A (en) * | 2007-08-08 | 2009-02-26 | Nippon Ester Co Ltd | Core-sheath type conjugate fiber |
| JP2010077575A (en) * | 2008-09-29 | 2010-04-08 | Unitika Trading Co Ltd | Fabric for preventing transmission of infrared-ray photographing, and clothing product using the same |
| JP2015014076A (en) * | 2013-06-05 | 2015-01-22 | ユニチカトレーディング株式会社 | Functional fiber yarn and woven knitted fabric |
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2015
- 2015-06-12 KR KR1020150083136A patent/KR101651896B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06200404A (en) * | 1992-12-28 | 1994-07-19 | Unitika Ltd | Rapidly dryable swimming suit |
| JP2009041137A (en) * | 2007-08-08 | 2009-02-26 | Nippon Ester Co Ltd | Core-sheath type conjugate fiber |
| JP2010077575A (en) * | 2008-09-29 | 2010-04-08 | Unitika Trading Co Ltd | Fabric for preventing transmission of infrared-ray photographing, and clothing product using the same |
| JP2015014076A (en) * | 2013-06-05 | 2015-01-22 | ユニチカトレーディング株式会社 | Functional fiber yarn and woven knitted fabric |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101976591B1 (en) | 2018-01-16 | 2019-05-10 | 주식회사 아모그린텍 | Nanofiber Membrane for Shielding Infrared Ray and Complex Fabric for Shielding Infrared Ray Using the Same |
| KR20190100647A (en) | 2018-02-21 | 2019-08-29 | 주식회사 녹수텍스테리어 | Superior See-Through and low heat gain Sunscreen Fabrics with Coated Yarn Containing Organic/Inorganic Hybrid Coating Layer and The Preparation Method Thereof |
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