KR101781936B1 - Low-melting point polyester fiber having cation dyeable - Google Patents

Abstract

The present invention relates to a low-melting-point polyester-based conjugate fiber having a cis-core type cationic fluorophore, wherein the conjugate fiber is composed of a cationophilic low-melting-point polyester as a sheath component and a cationophilic polyester as a core component The cationic saltable low melting point polyester is formed by copolymerizing dimethyl terephthalic acid or a diol component comprising ethylene glycol and an acid component composed of terephthalic acid and isophthalic acid and sodium 5-sulfoisophthalate, and the cationic saltable polyester Relates to a low-melting-point polyester-based conjugated fiber having a cationophilic property formed by copolymerizing an acid component of terephthalic acid with a diol component of ethylene glycol, and sodium 5-sulfoisophthalate.

Description

[0001] The present invention relates to a low-melting-point polyester fiber having a cationophilic property,

The present invention relates to a low-melting-point polyester-based conjugate fiber having cationophilic properties, which is formed so that all the conjugate fibers have cationophilic properties and has a cationophilic property, .

BACKGROUND OF THE INVENTION [0002] Polyester fibers have excellent physical and chemical properties and are used in a variety of fields, mainly for clothing and industrial applications.

Polyester fibers have been variously functionalized polyester fibers since its launch since copolymerization of monomeric terephthalic acid or dimethyl terephthalate with ethylene glycol and various copolymerizable monomers as a polymerization raw material has been made possible.

A cationophilic polyester fiber has been developed as one of various polyester fibers.

Generally, polyester fibers have a poor dyeability due to their dense fiber structure. When cate- tion dyes and disperse dyes are used, there is a problem in that dyeability is deteriorated at high temperature and high pressure of 130 ° C or when a carrier agent of organic solvent is not used.

In order to solve this problem, in JP-A-6-184820 and JP-A-2000-355831, dicarboxylic acid having a sulfonic acid metal base is copolymerized as a dicarboxylic acid component, whereby a cationic dye and a disperse dye A dye-transferable polyester fiber has been proposed.

When imparting cationic flame resistance to the fibers of the cis-core type conjugate fiber among the polyester fibers, a copolymer material which improves the cationic fluorine-containing property is used to improve the dyeability.

In order to heat-treat the polyester fiber at a melting point of about 270 ° C, the polyester fiber can be heat-treated at a very high temperature, resulting in a problem of a large energy consumption. In order to solve this problem, US Patent Nos. 4,129,675 and 4,065,439 , A polyester fiber in which the melting point of a polyester fiber is lowered to 200 캜 by copolymerizing isophthalic acid, adipic acid and neopentyl glycol has been proposed.

As described above, polyester fibers having various functionalities have been developed through various kinds of copolymer materials, and there is a need to develop multifunctional polyester fibers due to the increasing needs of consumers and the advancement of the textile industry.

It is an object of the present invention to solve the problems of the prior art as described above and to provide a cation-exchange resin capable of imparting cationophilicity to a cis-core type low melting point conjugated fiber, It is an object of the present invention to provide a polyester-based composite fiber having a melting point.

It is another object of the present invention to provide a low-melting-point polyester-based conjugated fiber having cationophilic properties, in which the sheath portion and the core portion all have a cationic fluorosilvering property and thus the dyeability is greatly improved.

The present invention relates to a low-melting-point polyester-based conjugate fiber having a cis-core type cationic fluorophore, wherein the conjugate fiber is composed of a cationophilic low-melting-point polyester as a sheath component and a cationophilic polyester as a core component The cationic saltable low melting point polyester is formed by copolymerizing dimethyl terephthalic acid or a diol component comprising ethylene glycol and an acid component composed of terephthalic acid and isophthalic acid and sodium 5-sulfoisophthalate, and the cationic saltable polyester Is a polyester obtained by copolymerizing an acid component of terephthalic acid with a diol component of ethylene glycol and sodium 5-sulfoisophthalate.

The cationically labile polyester low melting point polyester is characterized in that the isophthalic acid is contained in an amount of 10 to 30 mol% based on the molar amount of the ester.

Further, the sodium 5-sulfoisophthalate copolymerized with the cationic, low-boiling point polyester having a cationic group is contained in an amount of 1 to 3 mol% based on the molar amount of the ester. Thereby providing a composite fiber.

In addition, the sodium 5-sulfoisophthalate copolymerized with the cationic phosphatizable polyester is contained in an amount of 1 to 3 mol% based on the molar amount of the ester. The low melting point polyester- Lt; / RTI >

In addition, the cross-sectional area ratio of the sheath-core of the conjugate fiber is 6: 4 to 2: 8, and provides the low melting polyester conjugate having cationophilic properties.

As described above, the low-melting-point polyester-based conjugate fiber having cationophilic properties according to the present invention contains a copolymer which imparts a cationophilic halophilic property to both the sheath portion and the core portion, have.

In addition, the cite-core type low-melting-point conjugated fiber is imparted with a cationic fluorine-containing capability, so that it has an excellent durability and can be used for various purposes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing the surface bonding density (K / S) of a low-melting polyester conjugate fiber having cationophilic properties according to the present invention, according to the wavelength band.

Hereinafter, a preferred embodiment of the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

As used herein, the terms " about, " " substantially, " " etc. ", when used to refer to a manufacturing or material tolerance inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing the surface bonding density (K / S) of a low-melting polyester conjugate fiber having cationophilic properties according to the present invention, according to the wavelength band.

The present invention relates to a low-melting-point polyester-based conjugate fiber having a cis-core type cationic salt form, a cationic salt-forming low-melting-point polyester as a sheath component and a cationic saltable polyester as a core component.

The cationic salt-forming low melting point polyester as the sheath component is a copolymer formed by copolymerizing dimethyl terephthalic acid or a diol component comprising ethylene glycol and an acid component composed of terephthalic acid and isophthalic acid and sodium 5-sulfoisophthalate.

Isophthalic acid used in the present invention is copolymerized with polyester to decrease the flexibility of the polymer chains of the polyester and to keep the glass transition temperature of the polyester while lowering the melting point by interfering with regular chained folding and crystallization .

The isophthalic acid content is preferably contained in an amount of 10 to 30 mol% based on the mole of the ester of the cationic saltable low melting point polyester. When the content is less than 10 mol%, the desired melting point and molecular chain flexibility increase effect If the content is more than 30 mol%, the physical properties of the cationic fluorine-containing low melting point polyester may be deteriorated and the economical efficiency may be deteriorated.

Sodium 5-sulfoisophthalate contained in the cationic salt-lowering low-melting-point polyester is a substance which is copolymerized with polyester to give a cationic salt-imparting property, and the content of sodium 5-sulfoisophthalate in the cationic salt- It is preferable that the content is 1 to 3 mol% based on the molar amount of the ester of the low melting point polyester. If the content is less than 1 mol%, a satisfactory cationophilization performance can not be obtained. If the content is more than 3 mol% - Thickening and gelation due to the charge of sodium sulfoisophthalate may occur, which may reduce the radiation processability.

The cationic saltable polyester, which is the core component, is a copolymer formed by copolymerizing an acid component of terephthalic acid with a diol component of ethylene glycol, and sodium 5-sulfoisophthalate.

The sodium 5-sulfoisophthalate contained in the cationic saltable polyester is copolymerized in order to impart the cationic salt-imparting property to the core component, and is used in an amount of 1 to 3 moles based on the mole of the ester of the cationic saltable polyester % Is preferably contained.

The cross-sectional area ratio of the cis-core of the low-melting polyester conjugate fiber having a sheath-core type cationophilic property according to the present invention is preferably from 6: 4 to 2: 8. If the cross-sectional area ratio of the sheath is too large, , Tensile strength and the like can be improved, but a strong sense of touch can be obtained when the fabric is manufactured. If the cross-sectional area ratio of the sheath is too small, the fiber fairness may be deteriorated and the physical properties may deteriorate during fabrication.

The low melting point polyester-based conjugated fiber having cationophilic properties according to the present invention as described above has a high crystallinity and is free from deformation at a temperature below the melting point and has a glass transition temperature of 60 ° C or higher Thereby delaying the rate of change of the fiber due to the low glass transition temperature in the spinning and drawing process of the conjugate fiber to prevent a decrease in productivity due to the occurrence of adhesion between adjacent fibers in the process, .

In addition, the cation and the cation are both imparted to the sheath and the core, and the dye is dyed uniformly over the whole of the fiber when dyeing with a cationic dye, so that the dyestuff can be dyed with a small amount of dye because of high dyeability.

Hereinafter, examples of the method for producing the low-melting-point polyester-based conjugated fiber having cationophilic properties according to the present invention will be described, but the present invention is not limited to the examples.

Example  1 to 3

The cationic, low-boiling point cationic polyester used as the sheath component is obtained by adding dimethyl terephthalic acid, isophthalic acid (IPA) as an acid component to the ester reaction tank and sodium 5-sulfoisophthalate (DMS) was added thereto, and a typical esterification reaction catalyst was added at a temperature of 150 ° C., and the ester exchange reaction was carried out for 4 hours to a final reaction temperature of 200 ° C. to prepare an oligomer. The oligomer thus obtained was fed with a conventional polycondensation catalyst, and the polycondensation reaction was carried out by raising the temperature to 260 ° C while gradually reducing the pressure to 0.1 mmHg.

The cationophilic polyester used as the core component was prepared in the same manner as above but terephthalic acid as an acid component, ethylene glycol as a diol component and sodium 5-sulfoisophthalate (DMS) were used.

Using the sheath and core components prepared above, 75D / 36F low melting point polyester conjugate fibers according to the present invention having cationophilic properties were prepared by a conventional method for producing conjugate fibers.

In Examples 1 to 3, the contents of isophthalic acid (IPA), sodium 5-sulfoisophthalate (DMS) and cross-sectional ratios of cis-cores were varied. The contents of the respective copolymer materials were low The results are shown in Table 1 based on the mole of the ester of the polyester or cationophilic polyester.

Comparative Example  One

The polyester-based conjugated fiber was prepared in the same manner as in the above example, but was produced without using a copolymer material in the sheath and core.

Comparative Example  2

Polyester composite fibers were prepared in the same manner as in Example 1 except that the core component was prepared without using sodium 5-sulfoisophthalate (DMS).

Comparative Example  3

The polyester-based composite fiber was prepared in the same manner as in Example 1, except that 5-sulfoisophthalic acid sodium (DMS) was not used in the sheath component.

◈ Evaluation experiment of examples and comparative examples

The melting point, glass transition temperature, adhesion, and dyeing characteristics of Examples 1 to 3 and Comparative Examples 1 to 3 prepared above were evaluated and shown in Table 1.

The melting point / glass transition temperature was measured by measuring the sheath component. The dyeing property was measured by streaking the conjugated fiber with a circular knitting machine and staining with a cationic Blue dye (1 owf%) at 110 ° C for 30 minutes using an IR staining machine. The evaluation results of Examples 1 to 3 and Comparative Examples 1 to 3 are shown in Table 1.

[Assessment Methods]

* Melting point / glass transition temperature and softening behavior measurement

: Measured using a thermal differential scanning calorimeter (Perkin Elmer, dsc-7). When there is no heat absorption peak, that is, when no melting point exists, the softening behavior is measured using a dynamic thermal property measuring device (Perkin Elmer, DMA-7)

* Maximum dyeing temperature: After dyeing for 30 minutes by temperature up to 80 ~ 130 ℃,

* Surface Dyeing Concentration (K / S)

○ Measurement of surface dyed density (K / S) by dyed circular knitted fabric using a contact type spectrophotometer (Bench-top Spectrophotometer)

- Contact type spectrophotometer: Manufacturer X-rite, Model Color-Eye 7000A

- High-resolution spectroscopic color measurement equipment that outputs the spectral distribution and the tristimulus value by measuring the reflection spectrum of the surface or the transmission spectrum of the transparent semitransparent object in a contact manner

○ The reflectance of each wavelength band is measured and the K / S value is obtained from the surface reflectance of the maximum absorption wavelength as the apparent color density (durability) by the following Kubelka-Munk equation

K / S = (1 - R) ² / 2R

K: absorption coefficient

S: scattering coefficient

R: reflectance

FIG. 1 shows surface contamination concentrations according to the wavelength ranges of Example 1, Comparative Example 2, and Comparative Example 3.

* Wash fastness: measured according to KS K ISO 105 C06 (washing temperature 40 ± 2 ℃, washing time 30 minutes, 0.4% ECE standard detergent, 0.1% sodium borate)

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Sheath
Copolymerized feed composition
(mol%) IPA 25 25 25 - 25 25 DMS 1.8 1.8 One - 1.8 - Core
Copolymerized feed composition
(mol%) DMS 1.5 1.5 One - - 1.5 Sheath: Core ratio 4: 6 2: 8 4: 6 4: 6 4: 6 4: 6 Glass transition temperature (캜) 75 76 72 75 75 75 Dyeing properties Maximum Fertilization Temperature 110 110 110 130 110 110 Surface soil concentration 25.6 27.3 22.8 2.0 12.1 4.7 Wash fastness 5th grade 5th grade 5th grade 2nd grade 5th grade 5th grade

As shown in Table 1, in Examples 1 to 3, which are low-melting-point polyester conjugated fibers having cationophilic properties according to the present invention, the surface adhesion concentration (K / S) in the dyeing characteristics was higher than that of Examples 1 to 3 Which is higher than that of Comparative Example 2 having cationic fluorination performance and Comparative Example 3 having cationic fluorination performance only for the core component.

As shown in Table 1 and FIG. 1, since the concentration of the surface dyes in the Examples is higher than that in Comparative Examples 2 and 3, the content of sodium 5-sulfoisophthalate (DMS) It can be deduced that the workability is increased and the rate of saltation with the cationic dye increases. When the cationic salt-imparting property is imparted to both the sheath and core components, the dyeing performance is remarkably improved.

Claims (5)

In a low-melting-point polyester-based conjugate fiber having a cis-core type cationic salt-
Wherein the conjugate fiber is formed of a cationophilic low melting point polyester as a sheath component and a cationophilic polyester as a core component,
The cationic low salt of cationic polyester is formed by copolymerizing dimethyl terephthalic acid or an acid component consisting of terephthalic acid and isophthalic acid with a diol component comprising ethylene glycol and sodium 5-sulfoisophthalate,
The cationic saltable polyester is formed by copolymerizing an acid component of terephthalic acid with a diol component of ethylene glycol and sodium 5-sulfoisophthalate,
Sodium 5-sulfoisophthalate copolymerized with the cationic, low-boiling point polyester is contained in an amount of 1 to 3 mol% based on the molar amount of the ester, and 5-sulfoisophthalic acid copolymerized with the cationic- Sodium is contained in an amount of 1 to 3 mol% based on the molar amount of the ester to form a low melting polyester conjugate fiber,
Wherein the cationic fluorine-containing low-melting-point polyester has a glass transition temperature of 70 ° C or higher and the low-melting-point polyester-based conjugate fiber has a surface bonding concentration (K / S) of 22.8 or more at the time of dyeing with a cationic dye. A low melting point polyester-based conjugate fiber having on-salt resistance. The method according to claim 1,
Wherein the cationic low-salt point low-melting-point polyester comprises 10-30 mol% of the isophthalic acid based on the molar amount of the ester. delete delete The method according to claim 1,
Wherein the cross-sectional area ratio of the sheath-core of the composite fiber is 6: 4 to 2: 8.

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