KR20040037792A - A method of extracting sea component from woven or knitted fabric with sea-island type composite fiber - Google Patents

Abstract

PURPOSE: A sea ingredient eluting method of fabric and knitting containing sea-island type composite fiber is capable of separating an island ingredient satisfactorily, preventing streaky defect, improving a touch and increasing appearance. CONSTITUTION: Sea-island type composite fiber comprises; an island ingredient comprised of polyester containing at least 90mol% of polyethylene terephthalate; and a sea ingredient comprised of copolymerized polyester dissolved into alkali. A sea ingredient eluting method of fabric and knitting containing the sea-island type composite fiber is as follows: putting a hydrotropic builder into an alkali aqueous solution; and then treating the fabric and the knitting with the alkali aqueous solution at room temperature-130deg.C for 10min.-50hrs. The hydrotropic builder is urea, thio urea, polyethylene glycol, ethylene glycol or a mixture thereof.

Description

A method of extracting sea component of woven fabric containing island-in-the-sea composite fiber {A method of extracting sea component from woven or knitted fabric with sea-island type composite fiber}

The present invention relates to a method for dissolving sea component in a woven fabric or knitted fabric (hereinafter referred to as " isong island-shaped composite fiber woven fabric ") containing island-in-sea composite fibers in which island and sea components are combined.

More specifically, the sea component of the island-in-the-sea composite fiber contained in the knitted fabric is treated by treating the fabric prepared by using the island-in-the-sea composite fiber as a warp and / or weft yarn with an aqueous alkali solution. The present invention relates to a method of allowing the island components to be better short-fiber and ultra-fine while eluting effectively.

In order to give a synthetic leather fabric or knitted fabric a texture and appearance like natural leather, the island-in-sea composite fiber composed of island and sea components is fabricated with warp and / or weft, or the island-in-sea composite fiber is made. Knitted yarn is prepared using all or part of knitting yarn, and then the weight loss treatment is carried out with an aqueous alkali solution to dissolve the sea component in the island-in-the-sea composite fiber (single fiber), followed by buffing and dyeing. Manufacturing methods have been widely used.

The island-in-the-sea composite fiber is produced by complex spinning the island component of the polyester having a single yarn fineness of 0.1 denier or less and the sea component which is alkali-soluble in sea-island type after dissolution.

As the alkali-soluble sea component, polyethylene terephthalate is copolymerized with dimethyl-5-sulfoisophthalate sodium salt (hereinafter referred to as "DMIS") and / or low molecular weight polyalkylene glycol (hereinafter referred to as "PAG"). Or blended polymers or the like. As the island component, a polyester having a polyethylene terephthalate of 90 mol% or more is used.

However, in the conventional method, since the knitted fabric containing the island-in-the-sea composite fiber is treated only with an aqueous alkali solution, the sea component is not completely eluted when the sea component eluting conditions such as temperature and treatment time are slightly changed, and thus, There is a problem that the state is not completely separated, that is, in the form of a fiber bundle, so that the generation of lines causing color difference in the knitted fabric becomes severe, and the texture and appearance of the knitted fabric are poor.

In addition, there is a problem in that the island component present on the multifilament cross-section is reduced more by the aqueous alkali solution than the island component existing therein, the fineness difference between the island components occurs. In addition, there is a problem in that the external components on the multifilament cross-section is severely reduced by the aqueous alkali solution to form the fiber bundle.

As a result, it is difficult to manage the sea component dissolution process, and the problem of damage to the yarn properties during excessive elution process also occurred.

An object of the present invention is to more uniformly dissolve the sea component in the woven fabric containing islands-in-the-sea composite fiber, even if the elution conditions slightly vary in order to solve such a conventional problem, to completely separate the island components (short fiber) It is to provide a sea component elution method that can be made.

The present invention provides a sea component elution method of a woven fabric comprising an island-in-the-sea composite fiber capable of uniformly eluting the sea component of the island-in-the-sea composite fiber from the woven fabric containing the island-in-the-sea composite fiber. I would like to.

In order to achieve the above object, the present invention is to treat a knitted fabric comprising an island-in-the-sea composite fiber composed of the island component of the polyester with polyethylene terephthalate of 90 mol% or more and the sea component of the co-polyester which is water-soluble with alkali aqueous solution In eluting the sea component in the woven fabric, an aid (water repellent aid) having excellent water repellency is added to the aqueous alkali solution.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

First, in the present invention, the woven fabric containing the island-in-the-sea composite fiber (island-type composite fiber woven fabric) may be composed of all or part of a woven fabric using the island-in-the-sea composite fiber as a warp and / or weft yarn, and a knitting yarn. It includes all knitted fabrics that have been shaped using a composite fiber.

In addition, the island-in-the-sea composite fiber constituting the knitted fabric is a fiber in which the island component of the polyester having polyethylene terephthalate of 90 mol% or more and the sea component of the alkali-soluble copolyester are conjugated in the island-in-sea form.

As the sea component, it is preferable to use a polymer copolymerized or blended with DMIS and / or PAG in polyethylene terephthalate.

In the present invention, when the sea-island composite fiber knitted fabric is treated with an aqueous solution of an alkaline sea component (elution), a solution having excellent water repellency (hereinafter referred to as a "water repellent aid") is added to the aqueous alkali solution.

As the hydrophobic adjuvant, urea (H ₂ NCONH ₂ ), thiourea (H ₂ NCSNH ₂ ), polyethylene glycol, or ethylene glycol may be used alone, or two or more thereof may be mixed at the same time. It is preferable that the addition amount of the said hydrophobic adjuvant is 10-200 g / L.

The hydrophobic adjuvant serves to uniformly swell the island-in-the-sea composite fiber in the sea component elution process, and to allow the aqueous alkali solution (eluate) to uniformly penetrate into the island-in-the-sea composite fiber.

In addition, in this invention, a penetrant and / or a dispersing agent can also be added to aqueous alkali solution with a water permeable adjuvant.

Penetrants include sodium-2-ethyl-2-octenesulfate, SNOGEN 3YC-N from Daeyoung Chemical, KF Neorate NA-40 from Nika Korea, and FUKYTOKU from Pan-A Trading Co., Ltd. ) Use CM-20K. As a dispersant, a chelate dispersant such as KF Neocrystal K-2500 of Nikka Korea Co., Ltd. may be used.

The dosage of the penetrant is preferably 4-15 g / l, and the dosage of the dispersant is preferably 3-15 g / l. The penetrant reduces the interfacial tension between the fiber and the water so that the fiber is easily wetted with water and promotes contact between the alkyl component and the fiber dissolved in the water.

In the present invention, it is preferable to treat the knitted fabric containing the island-in-the-sea composite fiber with an aqueous alkali solution at room temperature to 130 ° C. to which a hydrophobic aid is added for 10 minutes to 50 hours.

Specifically, the woven fabric containing the island-in-the-sea composite fiber is immersed in an aqueous alkali solution of the present invention and heated to elute the sea component, or the island-in-the-sea composite fiber in 1 dip -1 nip manner. After immersion in squeeze treatment, and then aged at room temperature (Aeging) to elute the sea component.

In the present invention, various characteristics of the knitted fabric were evaluated by the following method.

Separation (short fiberization)

The cross-sectional state of the ultrafine (figure component) monofilament on the woven fabric after sea component elution was taken at 500 and 1,500 magnifications using a scanning electron microscope (JEOL T-330A). Specifically, if 8 or more out of 10 experts are judged to be excellent, ◎, if 6 to 7 are judged to be excellent, , 4 to 5 people were judged to be excellent, and 3 or less were judged to be excellent.

Fabric appearance, feel and dyeing uniformity

The dyed knitted fabric is cut 1 yard full width and placed flat and observed by 10 experts for sensory evaluation. Specifically, if 8 or more out of 10 experts are judged to be excellent, ◎, if 6 to 7 are judged to be excellent, , 4 to 5 people were judged to be excellent, and 3 or less were judged to be excellent.

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

150 denier / 32 filament (169 degree) island-in-the-sea composite fiber in which a polyester island component of polyethylene terephthalate is 98 mol% and a copolymer polyester sea component having 5 mol% copolymerization of DMIS and an alkali-soluble property 2 ply circular letters were sectioned using. Subsequently, the prepared circular knitted fabric was put into a rapid dyeing machine, and then 10 g / l of sodium hydroxide solution, 30 g / l of urea and 4 g / l of sungen 3YC-N (penetrant) of Daeyoung Chemical Company in a bath ratio of 1:20. And 3 g / l of KF-neocrystal K-2500 (dispersant) manufactured by Nikka Korea Co., Ltd., were then eluted at 98 ° C. for 60 minutes. After washing with water, using a CI dispersion dye blue 79, a dispersion dye, the temperature was raised to 130 ° C. at a temperature increase rate of 1.5 ° C./min and dyed for 60 minutes. The results of evaluating various properties (characteristics) of the dyed circular knitted fabric are shown in Table 3.

Example 2 to Example 3 and Comparative Example 1 to Comparative Example 3

A dyed circular knitted fabric was prepared under the same process and conditions as in Example 1 except for changing the type and amount of the compostable preparation and the amount of the penetrant and the dispersant as shown in Table 2. The results of evaluating various properties (characteristics) of the dyed circular knitted fabric are shown in Table 3.

Example 4

75 denier / 36 filament polyester twisted yarn is used as a warp, and the polyester (95% by mol of polyethylene terephthalate) and DMIS are copolymerized with 5 mol% of DMIS, so that the co-polyester sea component having alkali usability is mixed in an island-in-water type. Weaving fabrics were runners using 150 denier / 32 filament (169 degrees) island-in-the-sea composite fibers as weft yarns. On the other hand, 125g / ℓ aqueous sodium hydroxide solution was prepared and sufficiently stirred, and then 100g / urea, 10g / ℓ of Snowgen 3YC-N (penetrant) of Daeyoung Chemical Company and KF-neocrystal K-2500 ( Dispersant) 10 g / L was added and stirred to prepare a sea component eluate. Subsequently, the woven fabric was immersed in the seaweed eluate at room temperature, and then treated in a 1 dip-1 nip method to squeeze the wet pick-up rate to 80%. Aging was performed for 15 hours. Subsequently, the aged fabric was rinsed sufficiently with cold water, heated to 130 ° C. at a temperature increase rate of 1.5 ° C./min using C.I dispersion dye blue 79 as a dispersion dye, and then dyed for 60 minutes. The results of evaluating various properties (characteristics) of the dyed fabric are shown in Table 3.

Example 5 to Example 6 and Comparative Example 4 to Comparative Example 6

Dyeing fabrics were prepared in the same process and conditions as in Example 4 except that the type and amount of the compostable preparation and the amount of the stagnation agent and the dispersant were changed as shown in Table 1. The results of evaluating various properties (characteristics) of the dyed fabric are shown in Table 3.

Manufacturing conditions of dyed circular letters division Combustible Penetrant Injection (g / ℓ) Dispersant input amount (g / ℓ) Kinds Input amount (g / ℓ) Example 1 Urea 30 4 3 Example 2 Thiou Urea 50 8 0 Example 3 Urea / Ethylene Glycol 80 0 10 Comparative Example 1 - (not used) 0 10 0 Comparative Example 2 - (not used) 0 10 10 Comparative Example 3 - (not used) 0 0 10

Manufacturing condition of dyeing fabric division Combustible Penetrant Injection (g / ℓ) Dispersant input amount (g / ℓ) Kinds Input amount (g / ℓ) Example 4 Urea 100 10 10 Example 5 Polyethylene glycol 110 10 0 Example 6 Thiourea / Ethylene Glycol 120 0 10 Comparative Example 4 - (not used) 0 0 10 Comparative Example 5 - (not used) 0 10 10 Comparative Example 6 - (not used) 0 10 0

Properties of Dyed Circular Letters and Dyed Fabrics division Island component separability Exterior touch Dyeing uniformity Example 1 ◎ ◎ ◎ Example 2 ◎ ◎ ◎ Example 3 ◎ ◎ ◎ ◎ Example 4 ◎ ◎ ◎ Example 5 ◎ ◎ ◎ ◎ Example 6 ◎ ◎ ◎ Comparative Example 1 × × × × Comparative Example 2 × △ △ Comparative Example 3 × × × × Comparative Example 4 × × × × Comparative Example 5 × △ △ △ Comparative Example 6 × △ × ×

The present invention can satisfactorily separate the island components in the woven fabric including the island-in-the-sea composite fiber even under various weight reduction conditions, thereby preventing the generation of streaks during dyeing and improving the feel and appearance of the woven fabric.

Claims (5)

In eluting the seaweed component in the knitted fabric by treating the knitted fabric comprising the island-in-the-sea composite fiber composed of the island component of the polyester having a polyethylene terephthalate of 90 mol% or more and the sea component of the co-polyester which is water-soluble in alkali. A method of eluting sea component in a woven fabric comprising an island-in-the-sea composite fiber, comprising adding a water-repellent aid (water repellent aid) to an aqueous alkali solution. The method for eluting sea component in a woven fabric comprising an island-in-the-sea composite fiber according to claim 1, wherein the preparation having excellent water repellency is a urea, thiourea, polyethylene glycol, ethylene glycol or a mixture thereof. The method for eluting sea component in a woven fabric comprising an island-in-the-sea composite fiber according to claim 1, wherein the addition amount of the water-repellent aid (water repellent aid) is 10 to 200 g / L. The method for eluting sea component in a woven fabric comprising an island-in-the-sea composite fiber according to claim 1, wherein a penetrant and / or a dispersant is added to the aqueous alkali solution. The method of claim 1, wherein the woven fabric containing the island-in-the-sea composite fiber is treated with an aqueous alkali solution at room temperature to 130 ° C. for 10 minutes to 50 hours. .