KR100375247B1 - A circular knit having an excellent washfastness and lightness - Google Patents

Abstract

The present invention relates to a circular letter with excellent washing and light fastness. Specifically, the circular knitted fabric of the present invention contains an original component selected from the group consisting of carbon black, pigments, and dyes at least one of the front and back surfaces of the circular knitted fabric and has a single yarn fineness of 0.001 to 0.2 denier or the microfine yarn It consists of a blended yarn of highly shrinkable yarn and is characterized by a laundry fastness of 2.5 or more, and a daylight fastness of 5 or more. The microfiber yarn constituting the circular knitted fabric of the present invention contains an original component such as carbon black, so that a separate dyeing step can be omitted, and washing fastness and light fastness are excellent.

Description

A circular knit having an excellent washfastness and lightness}

The present invention relates to a circular letter with excellent washing and light fastness.

As the fiber becomes thinner, the bending stiffness is lowered, so that the forge made of the ultrafine fiber has the advantage of having a very soft touch. In addition, the development of ultra-fine technology of synthetic fibers has been the motive for greatly improving the merchandise of clothing-sensitive materials.

In general, the production method of ultra-fine fibers can be classified into three types: direct spinning, two-component split spinning, and two-component eluted spinning. The fineness of the ultrafine fibers manufacturable by the direct spinning method is 0.3-0.5 denier, and the fineness of the ultrafine fibers manufacturable by the two-component split spinning method is 0.2 denier, whereas the fineness of the ultrafine fibers manufacturable by the two-component elution spinning method is 0.001. Even denier levels can be produced.

Commercialization using such ultra-fine fibers is progressing in various ways in the textile sector, but in the knitting sector, especially in the circular knitting sector, commercialization is not progressed due to various defects generated during canon and post-processing.

Specifically, when the ultra-fine fibers of 0.3 ~ 0.5 denier level manufactured by the direct spinning method are applied to warp knitted fabrics, since many filaments are dispersed, the warp and weaving properties are very poor, and the specific surface area of the yarn is increased, raising the There is a problem that the fairness is poor, the napped state of the warp knitted paper produced is uneven and appearance is also poor.

On the other hand, when the ultra-denier fiber of 0.2 denier level manufactured by the two-component split type composite spinning method composed of nylon / polyester is applied to warp knitted fabric, due to the incompatibility of nylon and polyester, Nylon and polyester are segregated, resulting in poor hardness and weaving, and poor brushing. Uneven appearance of the warp knitted fabric produced is poor appearance. In addition, since nylon and polyester are mixed, dyeing is difficult and color fastness is reduced.

On the other hand, when warp knitted fabrics are prepared using an island-in-the-sea composite fiber having a level of 0.001 to 0.3 denier prepared using a two-component eluting spinning method using an alkali-soluble copolyester as a sea component and a regular polyester as a island component. In the warp, brushing and knitting properties are excellent, but there is a problem of low washing fastness and daylight fastness of warp knitted fabrics due to the poor dyeing characteristics peculiar to polyester (doe).

In order to overcome the problems described above, an object of the present invention is to use a island-in-the-sea composite fiber containing a primary component in a fiber-forming component when preparing a circular knitted fabric as a surface tissue layer yarn, and then, the island-in-sea composite fiber The dyeing process can be omitted by eluting the heavy sea component, and it is intended to greatly increase the light and wash fastness of the circular knitted fabric.

The present invention can be excellent in the processability, such as knitting, and can omit the dyeing process, to provide a circular knitted paper with excellent washing and light fastness.

In order to achieve such a problem, the circular knitted fabric of the present invention contains an original component selected from the group consisting of carbon black, pigment, and dye at least one of the front and back surfaces of the circular knitted fabric, and has a single yarn fineness of 0.001 to 0.2 denier. It is composed of a yarn or the blended yarn of the ultrafine yarn and the highly shrinkable yarn is characterized by a laundry fastness of 2.5 or more, and a daylight fastness of 5 or more.

Hereinafter, the present invention will be described in detail.

First, the surface tissue layer and / or the back surface layer constituting the circular knitted fabric of the present invention contains an original component selected from the group consisting of carbon black, pigments and dyes and has a single yarn fineness of 0.001 to 0.2 denier or microfine yarn and coriander. It is made of blended yarn of layered yarn. The microfiber yarn is a circular knitted fabric using a two-component eluting composite fiber or a mixed fiber thereof having a fiber-forming component containing a primary component and an eluting component using a soluble polymer as a surface tissue layer yarn and / or a back tissue layer yarn. It is formed by the method of eluting the eluted component in the post-processing process. In other words, in order to improve processability, the two-component eluting composite fiber is used as a surface tissue layer yarn, and then extruded to elute the eluted component.

As the water-soluble polymer, it is most preferable to use a copolyester having a very good alkali dissolution rate. As a specific example, (i) a co-polyester copolymerized with an ester unit containing a metal sulfonate in an ester unit of ethylene terephthalic acid, which is a main functional part, and (ii) a polymer obtained by blending a polyethylene glycol having a number average molecular weight of 8,000 or more. It is good to use. Moreover, water-soluble polyvinyl alcohol, polystyrene, etc. can also be used as a usable polymer. However, if polystyrene is used, there is a disadvantage that an environmental pollution problem occurs due to the solvent used during elution.

In particular, the present invention is characterized in that the original component is added to and contained in the fiber-forming component when spinning the island-in-the-sea composite fiber in order to improve the washing fastness and the light fastness of the circular knitted fabric. As said primary component, one or more components from the group consisting of carbon black, pigments and dyes are used. When carbon black is used alone, the microfiber yarn has a black color. If a color other than black is used for the microfiber yarn, a pigment or a dye type may be appropriately selected.

For example, as a dye, Papyron Yellow S-4G, Papyrion Red SG, Papyriion Blue S-GL, etc., which are solvent dyes (Eastwell Co., Ltd.) can be used. Heliogen Blue D 7030, Pariogen Red L 3885, and Paris Ortho Yellow D 1819 can be used. When the pigment or dyes of these three primary colors are properly combined and used, a desired color can be obtained. In addition, by adjusting the content of carbon black in the island component to 5% by weight or less can be produced a circular letter of gray (Grey).

The content of the primary component is preferably 0.1 to 15% by weight based on the weight of the fiber-forming component (microfine yarn). If the content of the primary component is less than 0.1% by weight, washing and light fastness enhancing effect may be insignificant, and when it exceeds 15% by weight, radioactivity may be reduced.

On the other hand, the single yarn fineness of the microfine yarn is preferably 0.001 to 0.2 denier. If the single yarn fineness exceeds 0.2 denier, the touch may be deteriorated. If the single yarn fineness is less than 0.001 denier, the touch may be soft but the friction resistance may be weak, resulting in poor appearance.

The boiling shrinkage rate of the highly shrinkable yarn used in the manufacture of the ultrafine yarn blended yarn is preferably 15% or more, and is preferable to improve the feel of the final product. Specific examples of the highly shrinkable yarn may be a modified polyester filament or the like.

On the other hand, when the microfine yarn or its blended yarn is used only on one side of the circular knitted fabric, it is preferable to use the Taesumido yarn of the polyester filament as the other side yarn. In order to improve washing and daylight fastness, the primary component may be contained 0.1-15% by weight of the original component.

It is preferable that the single yarn fineness of the said Taisum island yarn is 0.5-5 denier. If the single yarn fineness is less than 0.5 denier, it may be difficult to impart proper resilience to the circular knitted fabric. If the single yarn fineness exceeds 5 denier, the fairness of the knitting may be deteriorated, or the resilience of the circular knitted fabric may be too large. It may be difficult to express a soft touch on the surface.

Looking at the method for producing a circular knitted fabric of the present invention in more detail, first, the fiber-forming component containing 0.1 to 15% by weight of the primary component selected from the group consisting of carbon black, pigment and dye as a surface tissue layer yarn and a back tissue layer yarn The circular knitted fabric is sectioned in a circular knitting machine using an island-in-the-sea composite fiber composed of an eluting component that is an excessively soluble polymer or blended yarn of the island-in-the-sea composite fiber and a highly shrinkable yarn.

Meanwhile, the island-in-the-sea composite fiber or the island-in-the-sea composite fiber and the blended yarn of the high-shrink yarn are used only as the surface tissue layer yarn or the back side tissue layer yarn, and on the other side, polyester tasting yarns having a single yarn fineness of 0.5 to 5 deniers are used. It can also be used to slit circular letters.

Next, the circular knitted fabric chopped as described above is subjected to alkali reduction treatment to elute the eluted component (sea component) in the island-in-the-sea composite fiber to express an ultrafine yarn.

The circular knitted fabric of the present invention contains the above-mentioned original component in the ultrafine yarn, so that the dyeing step can be omitted. However, additional staining may be done to control the color of the circular knit. In case of further dyeing, even if the dye use concentration is less than 5%, sufficient deep color can be obtained, thereby reducing the amount of dye used.

Since the ultra-fine yarn or the microfine yarn constituting the circular knitted fabric of the present invention and the black fine yarn are contained in the Taeseomdo yarn, washing and daylight fastness are very excellent. Specifically, the laundry fastness is 2.5 or more, and the daylight fastness is 5 or more. In addition, since the circular knitted fabric of the present invention is chopped into a island-in-the-sea composite fiber state, the process passability is excellent, and the eluting component is eluted during post-processing, so that the yarn in the knitted fabric becomes extremely fine, and thus soft touch can be expressed.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

In a double-sided circular knitting machine of 18 gauge dial 4 races, polyethylene terephthalate containing 3% by weight of carbon black is used as a fiber-forming component, 5 mol% polyethylene glycol, 5 mol% dimethyl-5-sulfoisophthalate, Elution type of 150 denier / 48 filament with fiber-forming component fineness of 0.06 denier formed by dissolving alkali-soluble copolyester composed of 5 mole% of isophthalic acid and 85 mole% of polyethylene terephthalate. 50% denier / 24 containing blended yarns containing 3% by weight of carbon black yarn, which is interwoven with mixed fibers (raw yarn) and blended yarns blended with high shrinkage polyester yarns of 30 denier / 12 filaments with 18% boiling shrinkage. The polyester filament (primary yarn) of the filament is fed into the backing tissue layer yarn to knit the circular knitted fabric. The chopped circular knitted fabric was reduced and brushed for 40 minutes in a 1% concentration and an aqueous solution of caustic soda at 98 ° C. to prepare a processed circular knitted fabric. Staining was not performed at this time. Table 1 shows the results of evaluating the quality characteristics of processed circular knitted fabrics.

Example 2

Processed circular knitted fabric prepared under the same process and conditions as in Example 1 was dyed at 120 ° C for 45 minutes (ph = 4.5) with a black dispersion (concentration of 1.0% owf) in a general Rapid dyeing machine, and finally set to 160 ° C after reduction and washing. It was. The results of evaluating the quality characteristics, etc. of the dyed circular knitted fabric are shown in Table 1.

Example 3

In a double-sided circular knitting machine of 18 gauge dial 4 races, polyethylene terephthalate containing 5% by weight of solvent pyridion yellow S-4G (manufactured by Eastwell Co., Ltd.) as a fiber-forming component, and 5 mol% of polyethylene glycol , A fiber-forming component formed by dissolving an alkali-soluble copolymer polyester composed of 5 mol% of dimethyl-5-sulfoisophthalate, 5 mol% of isophthalic acid, and 85 mol% of polyethylene terephthalate as an eluting component, but the eluting component is eluted. A spun fiber yarn blended with 150 denier / 48 filament-eluted composite fibers (expanded yarn) with 0.06 denier and high shrink polyester yarn with 30% denier / 12 filament with 18% boiling shrinkage A 50-denier / 24 filament polyester filament (not a primary yarn) is fed into the backing layer yarn to reassemble the circular knitted fabric. The chopped circular knitted fabric was reduced and brushed for 40 minutes in a 1% concentration and an aqueous solution of caustic soda at 98 ° C. to prepare a processed circular knitted fabric. Table 1 shows the results of evaluating the quality characteristics of processed circular knitted fabrics.

Example 4

In a double-sided circular knitting machine of 18 gauge dial 4 races, a polyethylene terephthalate containing 4% by weight of heliogen blue D 7030 (Bust product), which is a pigment, is used as a fiber-forming component, and 5 mol% of polyethylene glycol is dimethyl-5. Fiber-forming component fineness formed after eluting the elution component using an alkali-soluble copolyester composed of 5 mol% of sulfoisophthalate, 5 mol% of isophthalic acid and 85 mol% of polyethylene terephthalate as elution component. Disintegrate the circular knitted fabric by spraying 150 denier / 48 filament-eluted composite fiber (original yarn) into the surface tissue layer yarn and 50 denier / 24 filament polyester filament (not the primary yarn) by the back tissue layer yarn. . The chopped circular knitted fabric was reduced and brushed for 40 minutes in a 1% concentration and an aqueous solution of caustic soda at 98 ° C. to prepare a processed circular knitted fabric. Table 1 shows the results of evaluating the quality characteristics of processed circular knitted fabrics.

Comparative Example 1

In a double-sided circular knitting machine having 18 gauge dial 4 races, polyethylene terephthalate is a fiber-forming component, 5 mol% polyethylene glycol, 5 mol% dimethyl-5-sulfoisophthalate, 5 mol% isophthalic acid and polyethylene 150-denier / 48 filament-eluted composite fibers (not primary yarns) with a fiber-forming component fineness of 0.06 denier, which is formed by dissolving the alkali-soluble copolymer polyester composed of 85 mol% of terephthalate as an eluting component. Yarn blended yarns blended with 30% denier / 12 filament high shrink polyester yarns with a 18% boiling shrinkage are fed into the surface tissue layer yarns, and 50 denier / 24 filament polyester filaments (not the primary yarns) are used as the backside layer yarns. Rapidly feed to prepare circular knit dough. After cutting and brushing the chopped circular knitted fabric in a 1% concentration and an aqueous solution of caustic soda at 98 ° C. for 40 minutes, and using black dispersant (concentration 12.5% owf), 120 ° C. × 45 minutes in a general rapid dyeing machine (ph = 4) to produce a processed circular letter. Table 1 shows the results of evaluating the quality characteristics of processed circular knitted fabrics.

Quality Characteristics of Circular Letters division Quality Characteristics of Circular Letters Color fastness Daylight fastness Black before dyeing Black after dyeing Example 1 Grade 5 7th grade 14.3 - Example 2 Class 3.5 6th grade 14.3 13.4 Example 3 4.5 grade 6th grade - - Example 4 4.5 grade 6th grade - - Comparative Example 1 1st grade Level 3 - 14.3

In the present invention, the boiling shrinkage of the yarn and the quality characteristics of the circular knitted fabric are evaluated by the following method.

Laundry fastness : measured by KS K 0430 A1 method.

Daylight fastness : measured by KS K 0700 method.

Black degree (L value) : Measured using a spectro flash 600 manufactured by Data Color Company.

Boiling Shrinkage (%) : Measure the length (l ₁ ) after shrinking the fiber sample at 100 ° C. boiling water at 0.15 g / d for 15 minutes and the length of the fiber principle (l ₀ ) before shrinkage treatment, respectively. Obtain the result by substituting the equation below.

Since the original component is contained in the ultrafine yarn constituting the circular knitted fabric of the present invention, the circular knitted fabric of the present invention is excellent in washing and light fastness. In addition, in the case of further dyeing, a sufficient deep color effect can be obtained even by reducing the amount of dye used.

Claims (5)

At least one of the surface and the back surface of the circular knitted fabric contains an original component selected from the group consisting of carbon black, pigments and dyes and is composed of a microfiber yarn having a single yarn fineness of 0.001 to 0.2 denier or a mixed fiber of the microfiber yarn and a highly shrinkable yarn. It is a round letter excellent in washing and daylight fastness, characterized in that the washing fastness of 2.5 or more, and the daylight fastness. The circular letter of claim 1, characterized in that the content of the primary component in the ultrafine yarn is 0.1 to 15% by weight. The circular letter paper of claim 1, wherein the highly shrinkable yarn contains a primary component. The circular letter paper of claim 1, wherein the main component of the ultrafine yarn and the highly shrinkable yarn is polyester. delete