KR20010058445A - Dyeing method of ultrafine fiber - Google Patents

Abstract

PURPOSE: A method for dyeing ultrafine fiber by padding each component of a composite fiber mixture of two components with an ultraviolet absorbing agent is provided. Whereby, a dyeing product is excellent in color fastness to light, touch feeling and coloring properties. CONSTITUTION: The dyeing method comprises the steps of: preparing a processing yarn with a partial drawn yarn of a single yarn fineness of 1 to 10 denier prepared by using a polymer selected from the group consisting of polyamide, nylon 66 or modified polyamide as a component A and a polymer except the component A as a component B; treating the component A comprising a degummed fabric obtained by degumming the processing yarn with a benzophenone based compound as an ultraviolet absorbing agent and passing through an airing section; treating the component B with a benzotriazole based compound; and set treating by passing through an airing section of 1 to 2m at 170 to 180deg.C for 2 to 3 hr.

Description

DYEING METHOD OF ULTRAFINE FIBER

The present invention relates to a method for dyeing ultrafine fibers, and more particularly, to dyeing each component of a composite yarn in which two components are mixed with different ultraviolet absorbers and pretreating the dyeing method for ultrafine fibers. It is about.

In conventional dyeing techniques, the ultrafine fibers have poor color development and light resistance after dyeing due to their properties. In particular, automotive interior materials had limitations in product development because the color development and light resistance of dyed products should be guaranteed even under extreme conditions.

Ultrafine fibers are excellent in flexibility and feel, but there are almost no dyes that can reliably guarantee their dyeability. However, some usable dyes are not used because of problems in color development.

In order to improve the fastness of the light fastness, the microfibers added by coloring the pigment in the polymerization process are relatively excellent in light resistance, but have various problems such as poor color and poor defects during the manufacturing process.

As one of the methods for producing microfiber, there is a method of spinning a polymer of two components and removing one component in a post-processing process. If the gap between the fibers is not sufficiently secured during one component removal process and if the component removal is not completed completely, the dye penetration is poor, and thus the degree of dye transfer into the fiber is also lowered. Will fall. In addition, if the solvent used in the process of removing one component is not completely removed from the fiber, the original color development is also lowered, and when the pigment is added to improve the light fastness, the solvent becomes difficult to use because the pigment is eluted.

Japanese Patent Application No. 62-37152 uses a method of coating a polymer on a fiber surface so that pigments do not elute during solvent treatment. However, there is a problem that a separate coating equipment is required and discolored by the polymer.

In order to realize high colorability while providing excellent light resistance, pre-dyeing pretreatment, that is, pretreatment to help absorb UV light, is required. As a ultraviolet absorber, a salicylic acid type, a benzophenone type, a benzotriazole type, and a metal complex compound are used typically.

Examples of salicylic acid include phenyl salicylate, pt-butylphenyl salicylate, and p-octylphenyl salicylate. Absorbents of this system have very low melting point, strong sublimation, and low effective absorption wavelength of the compound itself. (290-330 nm), it is unlikely that it will be used in textile products.

The benzophenone series includes 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone , 2,2-dihydroxy-4-methoxybenzophenone, 2,2-dihydroxy-4-dimethoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, The absorbents in this system are very expensive and are rarely used, but they can be used for ionic bond fibers because they can freely control the -OH group. In practical use, due consideration should be given to effective absorption wavelengths and processing temperatures.

In the benzotriazole type, 2- (2'-hydroxy-5'-t-methylphenyl) benzotriazole, 2- (2'-hydroxy-5'-t-butylphenyl) benzotriazole, 2- (2 ' -Hydroxy-3-t-butyl-5'-methylphenyl) -5-benzotriazole, 2- (2'-hydroxy-3-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole , 2- (2'-hydroxy-3,5'-di, t-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3,5'-di, t-butyl Phenyl) benzotriazole, etc., the UV absorber of this system is difficult to use because the compound itself has almost no reactor, but it is the most used until now due to its excellent absorption ability in the near-ultraviolet region required for UV protection. .

However, the problem is how to adsorb the compound which does not have a reactor to the fiber surface in a monomolecular state. Benzotriazole-based UV absorbers are mainly used for polyester fibers because they are inexpensive, suitable for adsorption on polyester fibers with molecular structure and molecular weight, high solubility in hot water, relatively high melting temperature and low toxicity. Because.

Metal complexes are used as ultraviolet absorbers for automobile interiors rather than textile products because they have a metallic ion color.

It is urgent to solve this problem because dyes with good fastness are not suitable for the sum of colors that require clarity. Currently, dyes with excellent light resistance, that is, combination of three primary colors of red, yellow and blue, are used to solve the problem of dyeing. It's partially resolved. However, since the dyeing products dyed using a combination of these colors are easily discolored and faded, the dyes excellent in color fastness are expensively purchased and used.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for dyeing fine fibers, wherein each component of a composite yarn mixed with two components is padded with different ultraviolet absorbers to be pretreated to reduce the aforementioned problems, and then reduced dyeing is performed. will be.

That is, in the present invention, a single yarn fineness of 1-10 denier manufactured by using one polymer selected from the group consisting of polyamide, nylon 66, or modified polyamide as component A, and polymer B except for component A selected as component B After the stretched yarn is manufactured into a processed yarn having a splitting degree of 30 to 50%, the processed yarn is refined using an alkali 0.5 g / l and a 0.5 g / l nonionic refining agent and dried to form a refined cloth. The component A was treated with 5-20 g / l of a benzophenone compound, which is an ultraviolet absorber, picked up at 50-70% in the first reactor and then passed through an airing section of 1-2m, and picked up at 60-80% in the second reactor. After squeezing, drying at 100-110 ° C. for 2-3 minutes, and then treating component B constituting the immersion fabric with a mixture of 20-40 g / l of a benzotriazole compound, an ultraviolet absorber, and 30-50 g / l of an acrylic binder. First reaction Pick up at 50-70% in the tank and let it pass through 1-2m airing section. In the second reactor, pick up at 60-80% and squeeze it, and then pass 1-2m airing section for 2-3 minutes at 170-180 ℃. It is to provide a dyeing method of the ultrafine fibers, characterized in that the pre-treatment by setting treatment during.

Hereinafter, the present invention will be described in detail.

In the present invention, the fiber which is the material of the high color and high light resistant fiber product is physically split and has a cross section in the form of a split composite fiber composed of two different components. One of the two components (component A) is a polymer selected from the group consisting of polyamide, nylon 66, modified polyamide, polyester or modified polyester, and the other (component B) except that selected from component A in the group Polymer.

In the present invention, a composite yarn of a mixture of nylon 66 and polyester was used, and the nylon 66 constituting the composite yarn was capable of ionic bonding, while the polyester had no ionic bonding force, but the benzotriazole-based ultraviolet ray was relatively inexpensive. Absorbents can be used.

The fiber used in the present invention is produced by spinning the composite ratio of the component A and component B to 85: 15-15: 85, and then partially stretched, so that the partial stretched yarn is divided into 30-50% so as to be combustible Physically split in the process. The criterion of the degree of division may be defined as the ratio of the number of divided short fibers to the total number of short fibers sampled, and if any component A is divided from the component B, it is considered to be divided.

After weaving the twisted yarn prepared as described above through the weaving process into a woven fabric and refining. Refining is carried out for 40-60 minutes at 98 ℃ using an alkali 0.5 g / l and 0.5 g / l nonionic refining agent, refined, washed, dehydrated and dried at 150 ℃ for 2 minutes.

The ultraviolet absorbers used in the present invention are benzophenone compounds and benzotriazole compounds, and the pretreatment method used a padding method.

First, make two baths of 5-20 g / l of 2,4-dihydroxybenzophenone to be applied to the nylon 66 portion, and 2- (2'-hydroxy-5'-t to be applied to the polyester portion. Two reactors were prepared in which 20-40 g / l of methylphenyl) benzotriazole and 30-50 g / l of acrylic binder having excellent softness were mixed.

First, the refined cloth is picked up by 50-70% through the reaction tank of the benzophenone compound, passed through the airing section of 1-2m, and then squeezed by 60-80% in the second reactor. Dry at 110 ° C. for 2-3 minutes or again pass 1-2 m airing section. Thereafter, the dried immersion cloth was picked up and squeezed in a reaction tank of benzotriazole-based compound at 50-70%, passed through an airing section of 1-2m, and squeezed at 60-80% in a second reactor, and then squeezed at 1-2m Pass through the airing section and set for 2-3 minutes at 170-180 ° C. Alternatively, the immersion cloth treated with a benzophenone compound is passed through an airing section of 1-2 m without drying, and then immediately immersed with the benzotriazole compound by the same method as described above for setting at 170-180 ° C. for 2-3 minutes. In this case, the amount of the benzotriazole-based compound is preferably not to exceed 40 g / l, but if the amount of the benzotriazole-based compound exceeds 40 g / l, the padding of the benzotriazole-based compound on the polyester is not preferable. In addition, the binder used in the benzotriazole-based reaction tank should be selected to maintain the softness as it is. It is preferable that the amount of the binder not exceed 50 g / l. If the amount of the binder exceeds 50 g / l, not only the cost increases but also the texture of the fiber tends to be stiff, which is not preferable.

In pretreated fabrics consisting of two-component materials, polyesters have been dyed with disperse dyes and polyamides have been dyed with acidic dyes, or dyeing with disperse dyes commonly used in both components has been the mainstream. The present inventors dyed the polyester-based component with a disperse dye and the polyamide component with a dry salt dye.

The vat salt has a unique chromophore, a carbonyl group (-C = O), which is a leuco compound (-C-OH-> -C-ONa) that is insoluble in water and alkali and is soluble in alkali by an alkaline reducing agent. When it is adsorbed on the fiber, it is oxidized in contact with air, thereby regenerating the carbonyl group to achieve the purpose of dyeing. Such a dry salt dye is excellent in fastness because it does not contain a soluble group.

Since the polyamide component of the two components constituting the fiber is weak to heat and high temperature for a long time, in the case of dyeing using the disperse dye in the dye and dyeing using the dye for 30-40 minutes at 120-130 ℃ It is preferable to carry out. At this time, the temperature increase and temperature reduction rate was set at 1 ° C./min and reduced washing at 80 ° C. for 20-30 minutes to remove the disperse dyes contaminated with the polyamide component, followed by washing with dry salt dye at 80 ° C. for 30-40 minutes. Reduction dyeing is carried out.

The following examples will further illustrate the present invention, and the following examples are described for the purpose of illustrating the present invention only, and are not intended to limit the protection scope of the present invention.

Example 1

20 parts of nylon 66 and 80 parts of polyester fiber (9 split composite fiber) were spun and partially stretched and burned to form a processed yarn having a degree of division of 35%, and a fabric was prepared using the weft yarn, and alkali 0.5g / The fabric was refined at 95 ° C. for 40 minutes with l and 0.5 g / l nonionic refiner and then dried at 150 ° C. for 2 minutes to obtain a refined cloth.

Prepare two reactors of 10 g / l 2,4-dihydroxybenzophenone to be applied to the nylon 66 portion for pretreatment padding and 2- (2'-hydroxy-5'-t- to be applied to the polyester portion. Two reactors in which 20 g / l of methylphenyl) benzotriazole and 30 g / l of acrylic binder having excellent softness were mixed were prepared.

First, the scouring cloth of the benzophenone compound was picked up by 70% and passed through the airing section of 1m, and then picked up by 80% in the second reactor and squeezed and dried at 110 ° C. for 2 minutes to make an immersion cloth. . Thereafter, the immersion cloth was picked up and squeezed at 70% in a benzotriazole-based compound reactor and passed through an airing section of 1m, and squeezed at 80% in a second reactor. While the settings were processed.

The pretreated fabric was dyed with 3% owf azo disperse dye and the polyamide component was dyed with 2% owf dry salt dye. First, dyeing was performed with a disperse dye at 120 ° C. for 30 minutes, reduced washing at 80 ° C. for 30 minutes, followed by washing with water, followed by reduction dyeing with a dry salt dye at 80 ° C. for 30-40 minutes. After reduction dyeing, washing with water and drying again at 170 ° C., finally, an ultrafine fiber dyeing product according to the present invention was obtained.

Comparative Example 1

The preparation was carried out in the same manner as in Example 1, except that the preparation of the immersion cloth was pretreated only with the benzophenone compound.

Example 2

The same procedure as in Example 1 was carried out except that the fabric pretreated with the benzophenone compound was treated with the benzotriazole compound continuously through an airing process immediately without drying.

Comparative Example 2

The same procedure as in Example 2 was carried out except that the benzophenone compound was not pretreated but only the benzotriazole compound.

The touch, light fastness and color development of the ultrafine fiber dyed products prepared by the above Examples and Comparative Examples were evaluated and the results are shown in Table 1 below.

touch Color development Light fastness Example 1 ◎ ◎ 4 Comparative Example 1 ○ △ 3 Example 2 ◎ ◎ 4 Comparative Example 2 △ × 3

[Remarks]

◎: most excellent

○: excellent

△: normal

×: defective

[Property evaluation method]

* Fastness to light fastness; It was measured on a gray scale.

As confirmed through the results of Table 1, the microfiber dyeing products dyed by the method of the present invention has the advantages of excellent light fastness and touch and excellent color development.

Claims (3)

Partially drawn yarns of single yarn fineness of 1 to 10 deniers manufactured by using one polymer selected from the group consisting of polyamide, nylon 66 or modified polyamide as component A, and the polymer B except those selected as component A After the 30 to 50% of the processed sand is manufactured, the processed sand is refined using 0.5 g / l alkali and 0.5 g / l nonionic refining agent and dried. 5-20g / l of benzophenone compound, absorbent, was picked up to 50-70% in the first reactor and passed through 1-2m airing section, and then picked up at 60-80% in the second reactor. Next, dried at 100-110 ° C. for 2-3 minutes, and then, the component B constituting the immersion cloth was treated with a mixture of 20-40 g / l of a benzotriazole compound, which is an ultraviolet absorber, and 30-50 g / l of an acrylic binder. In the reactor Pick up at 50-70%, pass through 1-2m airing section, squeeze and squeeze at 60-80% in second reactor, and pass through 1-2m airing section set at 170-180 ℃ for 2-3 minutes A method of dyeing ultrafine fibers, which is treated and pretreated. The method according to claim 1, wherein the scouring cloth is immersed in a benzophenone compound and then dried without passing through an airing section of 1-2 m and immediately immersed in a benzotriazole compound, without further drying. How to dye fine fibers. According to claim 1, dyeing for 30-40 minutes at 120-130 ℃ but at this time the temperature and temperature reduction rate 1 ℃ / min and reduced cleaning at 80 ℃ 20-30 minutes to contaminate the polyamide component After removing and washing with disperse dyes, the dyeing method of the ultrafine fibers, characterized in that the reduction dyeing using a vat salt dye at 80 ℃ for 30-40 minutes.