JPH09268432A - Highly colorable twisted polyester multifilament yarn for separated single filament yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a twisted polyester multifilament yarn for separated single filament yarns, good in spinnability, good in processability in downstream processes, especially yarn separation, having higher colorability than those of conventional yarns as a raw material for organdy, and useful for producing monofilaments having good brilliancy and high strength and used for the organdy. SOLUTION: This multifilament yarn is formed from a modified polyester having an intrinsic viscosity(IV) of >=0.64 and copolemnerized with a metal sulfaonate group-containing isophthalic acid component in an amount of 0.7-2.4mil.% based on all dicarboxylic acid components and with a polyalkylene glycol component having a mol.wt. of 90-6000 in an amount of 0.2-10wt.% based on the polyester. Each filament has a modified cross section, and the multifilament yarn has a chromium mirror surface dynamic frictional coefficient of <1.0 and an elongation of >=30%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to highly colored polyester multifilament yarn for twisted splitting fibers. More specifically, the present invention relates to a twisted splitting polyester multifilament yarn for producing a monofilament for organza, which has a higher coloring property than ever before as an organdy material, and has good sharpness and high strength. .

[0002]

2. Description of the Related Art Polyester fibers are widely used for general clothing and industrial materials because of their excellent properties such as mechanical properties, chemical properties, easy care and gloss. Among the clothing materials, there is organdy as a fabric used for clothing in a special field. Organdy is a thin, light-tensioned plain weave fabric that has long been manufactured from thin silk and cotton threads. After that, with the advent of synthetic fibers, synthetic fibers, especially polyester fibers, were developed in organza.

Taking advantage of the above-mentioned characteristics, the organdy is used for bridal products such as wedding dresses, party dresses, priests of monks, and clothes and decorations in special fields such as fashionable haori. Organdy is
In particular, materials that give rise to a noble atmosphere and materials that have a high-class feel are required, and various research and development have been conventionally performed to bring out the characteristics. Among them, particularly high color developability and vividness, a material with good glitter has been required, but conventional organdies in polyester fiber are usually ordinary polyester and mainly used monofilaments with a round cross section, There was no material with high color development, vividness and good glitter. In order to obtain these characteristics, it has been considered necessary to use a special polyester and make the cross-sectional shape of the monofilament a specific shape. For example, in Japanese Unexamined Patent Publication No. 60-199931, a synthetic fiber multifilament yarn is used as a yarn for organdy-like fabric, the total denier is 10 to 50 denier, the number of filaments is 2 to 3, and the boiling water shrinkage ratio of the filaments is different. Although a technique of using a fabric is disclosed, an organdy-like woven fabric obtained by this technique lacks high coloring and high sharpness and lacks a high-class feeling. In addition, JP-A-62-15633
Japanese Unexamined Patent Publication No. 4 discloses a technique of synthetic fibers having a fineness of 10 to 50 denier and a flat cross-sectional shape as a raw yarn used for silk-like organdy fabric, but this technique also has high color development and high sharpness. There is no such thing as a lack of luxury.

Several techniques have been developed in order to develop high coloring properties and vividness in polyester fibers. A basic dyeable polyester is well known as a polymer having excellent color developability. Conventionally, as a basic dyeable polyester, a copolymer obtained by copolymerizing an isophthalic acid component having a metal sulfonate group, for example, 5-sodium sulfoisophthalic acid component is known from Japanese Patent Publication No. 34-10497. However, in this case, in order to raise the color development to a satisfactory level, a large amount of an isophthalic acid component having a metal sulfonate group (hereinafter abbreviated as S component) must be copolymerized. A polyester obtained by copolymerizing a large amount of the S component has a high melt viscosity with a polymer having a degree of polymerization required as a fiber because of the thickening effect of the S component, making spinning difficult. Therefore, in order to spin a polymer obtained by copolymerizing a large amount of S component by a usual method, it is necessary to lower the degree of polymerization of the polymer in order to reduce the melt viscosity to a range where it can be normally spun. However, as a result, there are drawbacks that the yarn strength is lowered, the yarn-forming property and the ability to pass through high-order processes are lowered, and the use is limited. In addition, a product obtained by copolymerizing a large amount of S component also causes a decrease in alkali resistance and a decrease in light resistance of the dyed product, which also limits the use of the obtained yarn.

In the polyester fiber for organdy, various studies have been made on a fiber having high color developability, vividness, and good glittering property, but melt spinning property, stretchability and high-order passing property are poor, so that it is industrially used. The reality is that no satisfactory material has been developed yet, such as production is not possible.

[0006]

DISCLOSURE OF THE INVENTION The object of the present invention is to have good yarn-forming operability, good high-order passing property, particularly good fiber-splitting property, and to have a higher coloring property than ever before as a material for organza. Another object of the present invention is to provide a polyester multifilament yarn for twisted and divided fibers for producing a monofilament for organdy, which has good sharpness and high strength.

[0007]

The above-mentioned object of the present invention is to provide an "isophthalic acid component containing a metal sulfonate group in an amount of 0.7 to 2.4 mol% and a molecular weight of 90 to 6000 based on the total dicarboxylic acid component. It is formed of a modified polyester having an intrinsic viscosity (IV) of 0.64 or more obtained by copolymerizing a polyalkylene glycol component in an amount of 0.2 to 10% by weight with respect to polyester. The chrome specular dynamic friction coefficient of the yarn is less than 1.0, and the elongation of the multifilament yarn is 30.
% Or more high-color-forming polyester multifilament yarn for twisted splitting fibers ”.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. The highly colored polyester multifilament yarn for twisted and divided fibers of the present invention comprises a polysulfonate having an isophthalic acid component containing a metal sulfonate group of 0.7 to 2.4 mol% and a molecular weight of 90 to 6000 based on the total dicarboxylic acid component. It is necessary that the alkylene glycol component (hereinafter abbreviated as G component) is copolymerized with the polyester in an amount of 0.2 to 10% by weight to form a modified polyester having an intrinsic viscosity (IV) of 0.64 or more. The modified polyester has a higher yarn strength than that obtained by copolymerizing a large amount of the S component to enhance the dyeability, and exhibits good color development and light resistance to a basic dye. The S component is a compound represented by the following formula, specifically dimethyl (5-sodium sulfo) isophthalate, bis-
2-hydroxyethyl (5-sodium sulfo) isophthalate, bis-4-hydroxybutyl (5-sodium sulfo) isophthalate, dimethyl (5-lithium sulfo) isophthalate and the like.

[0009]

Embedded image (However, in the formula, M represents an alkali metal such as Na, Li, and K, and A and A ′ are hydrogen, an alkyl group, or — (CH ₂ ).
The preferable S component is dimethyl (5-sodiumsulfo) isophthalate or bis-2-hydroxyethyl (5-sodiumsulfo) isophthalate.

It is necessary to copolymerize the S component with 0.7 to 2.4 mol% with respect to the modified polyester acid component. When the copolymerization amount is less than 0.7 mol%, the dyeing property and color developability of the fiber with the basic dye are unsatisfactory, and when it exceeds 2.4 mol%, the melt viscosity is remarkably increased, and therefore it is suitable for melt spinning. Unfiltered yarn cannot be obtained and undrawn yarn having good yarn characteristics cannot be obtained. As a result, the yarn strength is also reduced.

The G component has a molecular weight of 90 to 6000.
Need to be When the molecular weight is less than 90, the dyeing and coloring properties of the fiber are unsatisfactory at a copolymerization amount that satisfies the light resistance, and the melting point of the modified polyester is low due to the small molecular weight. The high-order workability of is poor.

On the other hand, since the G component having a molecular weight of more than 6000 is difficult to be uniformly copolymerized in the modified polyester, the light resistance becomes unsatisfactory at a copolymerization amount which satisfies the dyeing property and the coloring property of the obtained fiber. Further, there are disadvantages such that the resistance to oxidative decomposition of the modified polyester is lowered and the anti-frosting property of the obtained fabric is lowered. The molecular weight of the G component is preferably 100 to 4000, and more preferably 100 to 1200.

A typical example of the above-mentioned G component having a molecular weight of 90 to 6000 is HO- (CH ₂ -CH ₂ -O) mR.
_{-O- (CH 2 -CH 2 -O)} nH ( wherein R is a divalent aliphatic hydrocarbon group having a straight-chain, cyclic, side chains having 3 to 20 carbon atoms, a phenylene group, biphenylene group, naphthalene A divalent aromatic hydrocarbon group such as a group, m and n are the same or different integers and 1≤m + n≤100), a glycol represented by the formula: bisphenol A-ethylene oxide adduct and a polyfunctional group represented by the following formula: Examples include alkylene glycol. A (CnH ₂ nO) mH In the formula, A is CeH ₂ (e + 1) O or OH, and e is 1 to 10,
n is an integer of 2 to 5 and m is an integer of 2 to 65.

As the G component, polyalkylene glycol is preferable. This is more advantageous than other G components for obtaining a modified polyester having a degree of polymerization required to obtain fibers having good yarn characteristics, because the polyalkylene glycol has a thickening effect larger than that of other G components. It depends. And as polyalkylene glycol, OH at both ends
More preferred is a polyethylene glycol having a group. This is because the shorter the alkylene oxide unit and the more randomly copolymerized glycol, the greater the effect of improving color development and the effect of reducing viscosity.

The amount of the G component copolymerized must be within the range of 0.2 to 10% by weight based on the modified polyester. When the amount of the G component copolymerized is less than 0.2% by weight, the color development of the modified polyester fiber is unsatisfactory, and when it exceeds 10% by weight, the light resistance and oxidative decomposition resistance of the dyed fabric are deteriorated.

The modified polyester fiber of the present invention must have an intrinsic viscosity of 0.64 or more. If the intrinsic viscosity is less than 0.64, the spinnability and stretchability are unsatisfactory,
The thread strength is not at a satisfactory level either. However, if the intrinsic viscosity is too high, the melt viscosity at the time of melt spinning becomes too high and spinning becomes difficult. Therefore, the intrinsic viscosity is preferably 0.88 or less.

Further, the modified polyester of the present invention may contain well-known additives such as antioxidants, optical brighteners, flame retardants and ultraviolet absorbers within the range that does not impair the effects of the present invention. Good. However, in the present invention, a known matting agent such as titanium oxide or calcium carbonate should not be contained in an amount of 0.1% by weight or more in order to emphasize the glitter.

In the present invention, it is important that the luster, the feeling of luxury, and the feel of organdy feel, especially the feeling of smoothness, and that the filament cross section has an atypical cross section. As atypical cross-sectional shape, three-leaf to eight-leaf cross section,
Any cross-sectional shape such as an uneven elliptical cross section may be used, but among these, the trilobal cross-sectional shape is preferable from the viewpoint of glitter and a high-grade feeling. In the trilobal cross-sectional shape, it is preferable that the three leaves have the same length, and the shape factor thereof is preferably 1.7 to 2.4.

In the multifilament yarn of the present invention, it is necessary that the filament cross section has an irregular cross-sectional shape, the chromium specular dynamic friction coefficient of the multifilament yarn is less than 1.0, and the elongation of the multifilament yarn is 30% or more. . In addition, it is necessary that the chrome specular dynamic friction coefficient of the multifilament yarn is less than 1.0, and when the value is 1.0 or more, the slipperiness of a guide or the like during spinning or drawing is poor and the spinnability is poor. It is not good, and the slipperiness of the guide during the separation is poor, so that thread breakage is likely to occur, and the separation property is poor, which is not good. The friction coefficient of less than 1.0 can be achieved by depositing an oil agent having good smoothness during melt spinning.

If the elongation of the multifilament yarn is small, yarn breakage easily occurs during drawing or during fiber splitting, resulting in poor fiber separation properties. Therefore, the elongation is required to be 30% or more.
It is preferably 5% or more.

The filament fineness of the multifilament yarn of the present invention is 10 to 30 denier,
It is preferable in terms of the quality of the organdy product and the separation property when the multifilament yarn is separated into monofilaments. Furthermore, it is preferable that the number of filaments of the multifilament yarn is 2 to 16 because good splitting property is obtained.

The multifilament yarn of the present invention is twisted, and the twisted multifilament yarn is divided into monofilaments, and the monofilaments are woven into an organdy. When producing the twisted multifilament yarns, In particular, in the winding process of the multifilament yarn, the multifilament yarn is wound with an appropriate twist so that there is no yarn breakage due to the collapse of the winding and the winding appearance is good. Furthermore, the number of twists with good splitting property is required in the splitting step, and the number of twists satisfying both of them is required. The twist number satisfying these is preferably 7 to 16 (T / m). The highly colored polyester multifilament yarn for twisted and divided fibers of the present invention comprises a polysulfonate having an isophthalic acid component containing a metal sulfonate group of 0.7 to 2.4 mol% and a molecular weight of 90 to 6000 based on the total dicarboxylic acid component. A modified polyester having an intrinsic viscosity (IV) of 0.64 or more, which is obtained by copolymerizing an alkylene glycol component in an amount of 0.2 to 10% by weight with respect to polyester, is melt-spun using a spinneret having atypical discharge holes, and spun. It can be manufactured by cooling the yarn with cooling air, and then winding the undrawn yarn, which has been applied with an oil agent having high smoothness and wound up, on a package while drawing and twisting with a normal draw twister. For example,
A spinneret having a trilobal discharge hole used for melt spinning has a shape factor of 1.7 to 2.4 in the cross section of the filament after drawing.
A spinneret with a three-lobe discharge hole is used, but the corners of the three-lobe discharge hole (the intersections of the leaves and the tip of the leaf) are rounded in order to prevent contamination of the spinneret during melt spinning. It is preferable to use the one which has been subjected to the attachment processing. Moreover, the number of twists of the multifilament yarn is 7 to 16 (T / m) when twisting the package while drawing and twisting with a draw twister
However, it is preferable to gradually increase the twist from the winding start to the winding end of the package. The package may be any type of bobbin such as a pan (wrapped on a bobbin), a drum or cheese (wrapped on a paper tube or other feeling), but the pan is most preferable from the viewpoint of handling in the separation process. preferable.

As described above, the multifilament yarn of the present invention is obtained by copolymerizing the S component and the G component, comprising a modified polyester having an intrinsic viscosity of a certain level or more, and having a specialized filament cross-sectional shape. , Polyester multifilament yarn for twisting and splitting to produce monofilaments most suitable for organza because they have a high coloring property that conventional monofilaments do not have, and have a dry refreshing feeling, good clarity, and high strength. Is.

[0024]

The present invention will be described in more detail with reference to the following examples. The physical properties in the examples were measured as follows.

A. Glycol component in polymer After amine decomposition of the polymer, quantitative analysis was performed using gas chromatography or liquid chromatography.

B. Intrinsic viscosity 0.8 g of modified polyester is dissolved in 10 CC of ortho-chlorophenol, and the solution is 2 with Ostwald viscometer.
It was measured and determined at 5 ° C.

C. It measured based on the blue scale when light-fading was carried out according to JIS-L1044 using a light resistance fade meter.

D. Dyeability Malachite Green (manufactured by Kanto Kagaku) 5% owf, acetic acid 0.5 g / l, sodium acetate 0.2 g / l, bath ratio 1:10
It was determined by the dye exhaustion rate by dyeing under the conditions of 0 and a temperature of 120 ° C. solvent water.

E. Coloring property A state in which the cloth is dyed by the above-mentioned method so that the dye exhaustion rate of the cloth is the same, and five or more cloths are stacked by using an SM color computer (manufactured by Suga Test Instruments Co., Ltd.), and irradiation light is not transmitted. The L value was measured (the smaller the L value, the better the color developability).

F. Coefficient of kinetic friction of chrome mirror surface of multifilament yarn A chrome mirror cylinder having a diameter of 3.6 cm was brought into contact with the cylinder at 90 degrees and run at 2.5 m / min to measure the coefficient of kinetic friction.

G. Strength and elongation of multifilament yarn "Tensilon UTM-4-10" manufactured by Toyo Baldwin Co., Ltd.
0 ", sample length 200mm, pulling speed 200mm
The load-elongation curve is measured under the condition of / min, the strength and the elongation are read from this curve, and the average value of 10 times is calculated.

Example 1 As a polymer, terephthalic acid (98.3 mol%) was used as an acid component.
And dimethyl-5-sodium sulfoisophthalic acid (1.
7 mol%), a polyester using ethylene glycol as a glycol component and a glycol shown in Table 1 (having an intrinsic viscosity adjusted to 0.68 to 0.70), and a trilobal discharge at a spinning temperature of 295 ° C. After discharging from a die having 8 holes, it is cooled by applying cooling air at a speed of 30 m / min,
After applying an oil agent having high smoothness while controlling so that the amount of oil adhered was 1.0%, the spinning speed was 1600 m /
Rolled up in minutes. The trilobal discharge hole of the die was a die having a cross-sectional shape of the obtained filament in the range of 1.8 to 1.9.

The undrawn yarn thus obtained was drawn with a hot roll-hot plate draw twister to obtain a drawn yarn having an elongation of 40.
While drawing and twisting at a draw ratio of ± 2%, a multifilament yarn of 120 denier 8 filaments was wound at a winding speed of 800 m / min. The twisting condition is 9 (T / m) at the beginning of the package and 12 (T at the end of the package).
/ M), and the condition was such that it gradually increased from the beginning to the end of the winding.

The obtained multifilament yarn was divided into eight monofilaments by a series-type separating machine, the obtained monofilaments were warped, and a WJL loom was used to obtain a weaving density vertical direction 9
7 pieces / inch × horizontal 102 pieces / inch was woven to obtain an organdy. Table 1 shows the contents of glycol added to the polymer, the characteristics of the obtained multifilament yarn, and the results of various evaluations of organdy.

[0035]

[Table 1] Experiment No. of the present invention. 1 to 7 have high thread strength, color developability,
It was excellent in dyeability and light resistance, had good separation properties, and had a dry refreshing sensation as a result of organoleptic evaluation. It also had good sharpness and had a unique luster. .

Experiment No. In No. 8 (Comparative Example), the yarn formability was poor, the yarn strength was extremely low, and the color development and light resistance were not sufficient. Experiment No. 9 (comparative example) has low dyeability,
Experiment No. No. 10 (Comparative Example) had poor light resistance, moreover, there were many yarn breakages during stretching, and uneven dyeing of the dyed organdy was observed.

Example 2 Experiment No. 1 of Example 1 A multifilament yarn was obtained in the same manner as in Example 1 except that a polyester having a polymer composition of 6 and various intrinsic viscosities IV was changed to a spinning temperature at which melt spinning was normally performed, and evaluated in accordance with Example 1. Experiment No. 1 having a low intrinsic viscosity IV. No. 11 (Comparative Example) has a low yarn strength and is not at a satisfactory level. Also, the number of yarn breakages during spinning was 5 times / ton.

Experiment No. Nos. 12 to 15 (invention) had no problem in strength and fiber splitting property. However, in Experiment No. Since No. 15 has a high melt viscosity during spinning, it is difficult to spin for a long time, which is not preferable in production. The other properties such as color developability, dyeability and light resistance were all satisfactory. Table 2 shows the results.

[0039]

[Table 2] Example 3 Experiment No. 1 of Example 1. A non-stretched yarn of No. 6 was used, and a multifilament yarn with a changed elongation was obtained according to Example 1 except that the stretch ratio during stretching was changed. The obtained multifilament yarn was divided into fibers according to Example 1, and the separating property was evaluated. Table 3 shows the evaluation results.

[0040]

[Table 3] Experiment No. In No. 16 (Comparative Example), the degree of elongation was small, and thus the separation property was poor.

Experiment No. Experiments Nos. 17 to 19 (invention) have good splitting property, and particularly have an elongation of 35% or more.
o. Nos. 18 and 19 had good separation properties.

Example 4 Experiment No. 1 of Example 1 Under the conditions of No. 6, four levels of multifilament yarns having different chromium specular dynamic friction coefficients of the multifilament yarns were obtained according to Example 1 except that the type of oil agent attached during melt spinning was changed. The obtained multifilament yarn was evaluated for the chrome specular dynamic friction coefficient, spin winding property, draw ratio, and fiber splitting property. Table 4 shows the evaluation results.

[0043]

[Table 4] Experiment No. 20 to 22 (invention) has a dynamic friction coefficient of 1.
It was less than 0, and there were no problems in the spin-up windability, the drawing superiority ratio, and the fiber separation property. However, in Experiment No. No. 23 (Comparative Example) had a high dynamic friction coefficient, and therefore was not good in the spin-up windability, the drawing superiority ratio, and the fiber splitting property, which was a problematic performance for a company.

Example 5 Experiment No. 1 of Example 1 Under the conditions of No. 6, the shape of the spinneret discharge hole was changed, and 5 levels of multifilament yarn were obtained in which the filament cross-sectional shape factor of the obtained multifilament yarn was changed. Table 5 shows the results of the spinnability and the quality of the woven fabric.

[0045]

[Table 5] Experiment No. In No. 24, the unevenness of gloss in the woven fabric was slightly conspicuous because the shape factor was small. Experiment No. In No. 28, since the shape factor was large, the spinnability was somewhat poor, and the texture of the woven fabric was slightly rough when evaluated by touch. From the above results, the shape factor is preferably 1.7 to 2.4.

Example 6 Experiment No. 1 of Example 1 According to Example 1, 4 levels of multifilament yarns were obtained, except that the unstretched yarns of No. 6 were used and the twisting conditions during stretching and twisting were changed to change the number of twists of the multifilament yarns. Table 6 shows the twisting conditions and the evaluation results of the splitting property of the obtained multifilament yarn.

[0047]

[Table 6] Experiment No. Nos. 29 and 30 had good splitting properties. Experiment N
o. In No. 31, the number of twists at the winding end of the package of the multifilament yarn was large, the yarn was broken at the beginning of the splitting, and the splitting property was slightly poor. Experiment No. 3
In No. 2, the number of twists at the beginning of winding of the package of the multifilament yarn was small, the yarn was broken at the end of the splitting in the splitting, and the splitting property was slightly poor. From the above results, the twist number of the multifilament yarn is preferably 7 to 16 (T / m).

[0048]

As described above, according to the present invention, a polyester multifilament yarn having good yarn-forming operability, high-order passing property, particularly good fiber-splitting property, and high color-forming property which has never been obtained is obtained. Also, it is possible to provide a polyester multifilament yarn for twisting and splitting, which has good vividness, high strength, and can produce a monofilament most suitable for organza. The organdy obtained from the yarn has not only excellent color development and sharpness that have never been obtained, but also unique luster that is not possible with conventional materials, and has a dry refreshing feeling, and is differentiated from conventional materials. It is highly valuable as a new material.

Claims (5)

[Claims] 1. An isophthalic acid component containing a metal sulfonate group is used in an amount of 0.7 to 2.4 based on the total dicarboxylic acid component.
0.2% to 10% by weight of a polyalkylene glycol component having a mol% and a molecular weight of 90 to 6000 with respect to the polyester.
The multifilament is formed of a modified polyester having an intrinsic viscosity (IV) of 0.64 or more copolymerized, a filament cross-section having an irregular cross-sectional shape, and a multifilament yarn having a chromium specular dynamic friction coefficient of less than 1.0. Highly color-developing polyester multifilament yarn for twisted and divided fibers having a yarn elongation of 30% or more. 2. A polyester multifilament yarn,
The highly colored polyester multifilament yarn for twisted splitting according to claim 1, which is for organdy. 3. The high color development for twisted and split fibers according to claim 1, wherein the cross-sectional shape of the filament cross-section is a trilobal cross-section and the shape factor is 1.7 to 2.4. Polyester multifilament yarn. However, the shape factor of the trilobal cross-sectional shape is (diameter of circumscribed circle /
The diameter of the inscribed circle). 4. The highly colored polyester multifilament for twisted and split fibers according to claim 1, which is a multifilament yarn having a filament fineness of 10 to 30 denier and a number of filaments of 2 to 16. yarn. 5. The twist number of the multifilament yarn is 7 to 1.
It is 6 (T / m), and the highly colored polyester multifilament yarn for twisted and split fibers according to any one of claims 1 to 4.