KR20050073909A - Ultra fine conjugate ptt fibers for artificial leather and manufacturing method thereof - Google Patents

Abstract

The present invention mixes a polytrimethylene terephthalate and an soluble polyester having excellent solubility in an alkaline solution on a distribution plate of a spinning pack device, and then spins through a nozzle and processes the spun yarn into a nonwoven fabric, a woven fabric, and a knitted fabric. The present invention relates to an ultrafine polytrimethylene terephthalate composite fiber for artificial leather prepared by dissolving a soluble polyester. PTT composite fiber of the present invention has a soft touch similar to nylon due to alkali resistance, low Young's Modulus, and can be disperse dye at low temperature and atmospheric pressure, so that the artificial leather has excellent touch and rich dyeing property when processed into artificial leather. Manufacturing is possible.

Description

Ultra fine conjugate PTT fibers for artificial leather and manufacturing method

The present invention relates to a polytrimethylene terephthalate composite fiber for artificial leather, and more particularly, polytrimethylene terephthalate (PTT) and an alkali-soluble polyester are mixed on a distribution plate of a composite spinning pack device, and then spun through a nozzle. Ultra-fine polytrimethylene terephthalate composite for artificial leather which can be made into nonwoven fabric, woven fabric and knitted fabric, and then functional polyester leather with excellent touch and low temperature atmospheric pressure dyeing by dissolving usable polyester in alkaline aqueous solution A fiber and a method for producing the same.

Conventional ultrafine composite fibers using polytrimethylene include those disclosed in Korean Patent Laid-Open Publication Nos. 1999-0076028 and 1990-0076036, but these are decomposed by using polyethylene or copolyester as a second component other than PTT. When polyethylene is used as a powder, the difference in melting temperature between polyethylene terephthalate or polytrimethylene, which is an island component, is so large that the melt viscosity difference between island and sea components is large, resulting in poor spin processability. There is a further disadvantage.

Therefore, the present invention is to provide an ultra-fine polytrimethylene terephthalate composite fiber and a method of manufacturing the same that can solve all the problems of the prior art as described above.

The present invention that solves the above problems can be produced artificial leather with excellent touch and excellent dyeability, ultrafine polytrimethylene terephthalate (PTT) composite fiber having a fineness in the range of 0.1 ~ 0.001 denier range of ultrafine fineness and It is a technical subject to provide the manufacturing method.

Therefore, according to the present invention, polytrimethylene terephthalate (PTT) having an intrinsic viscosity of 0.8 to 1.2 is used as a matrix component (A), and an alkali-soluble polyester having an intrinsic viscosity of 0.4 to 0.7 is used as a dissolving component (B). It provides an ultra-fine polytrimethylene terephthalate composite fiber for artificial leather, characterized in that the A / B ratio is 40/60 to 90/10 weight ratio.

In the present invention, polytrimethylene terephthalate (PTT) having an intrinsic viscosity of 0.8 to 1.2 is used as a matrix component (A), and an alkali-soluble polyester having an intrinsic viscosity of 0.4 to 0.7 is used as a dissolving component (B), respectively. Melt-extruded at a ratio of 40/60 to 90/10 weight ratio and supplied to the spinning block, and then mixed in the distribution plate of the spinning pack to spin at a draw ratio of 1.5 to 3.5 and a spinning winding speed of 2,500 to 5,000 m / min. , The yarn is manufactured by applying the stretching heat treatment during the spinning process and subjected to alkali treatment, the fineness is 0.1 ~ 0.001 denier, the ultra-fine polytrimethylene tere for artificial leather, characterized in that the strength retention of the yarn before the weight loss is 90% or more Provided are methods for producing phthalate composite fibers.

Hereinafter, the present invention will be described in more detail.

According to the present invention, polytrimethylene terephthalate, a fiber-forming matrix component, and a water-soluble polyester, which are water-soluble components, are each uniformly supplied to a spinning block at a predetermined ratio using an extruder, and then uniformly mixed in a distribution plate of a spinning pack and discharged. Polytrimethylene terephthalate for artificial leather (hereinafter referred to as "PTT") having a fineness of 0.1 to 0.001 denier by dissolving the usable polyester by using alkali, after spinning through a ball and stretching heat treatment during the spinning process. ) Relates to a composite fiber. Here, the usable polyester is obtained by copolymerizing polyethylene terephthalate with polyethylene glycol or 5-sodium sulfoisophthalic acid or a mixture of 3 to 20 mol% thereof.

The two-component composite fiber of the present invention is melt-extruded PTT and usable polyester, respectively, using an extruder attached to a conventional spinning machine for spinning, and discharged at a constant rate through each gear pump and mixed in a distribution plate of a spinning pack. When the yarn is produced by spinning through the discharge hole, and the stretching heat treatment is applied to produce a stretched yarn, a composite fiber having a cross-sectional shape in which the PTT component is arranged in the fiber axial direction in the usable polyester is produced. At this time, the usable polyester showed a form surrounding the PTT microfiber, and the ratio of the molten matrix component (A) and the dissolving component (B) was considered considering the fineness and workability of the matrix component that is expressed when the dissolved component is dissolved with alkali. When the A / B ratio is 40/60 ~ 90/10 weight ratio is appropriate, preferably 60/40 ~ 80/20 weight ratio. At this time, if the ratio of the dissolved components exceeds 60, the fineness range can be lowered, but there is a disadvantage in that excessive consumption of alkali is required because the weight ratio is high, and if the yarn is manufactured with less than 10, the fineness range is increased and artificial leather There is a disadvantage that the touch becomes hard. In addition, by controlling the extruder temperature and the spinning temperature for extruding each component in order to prevent the reduction in strength after sea component loss of the manufactured yarn, it is possible to prevent the strength decrease after yarn reduction. At this time, it is preferable that the temperature of an extruder is 245-285 degreeC, and a spinning temperature is 250-285 degreeC. If the temperature of the extruder is less than 245 ° C., there is a disadvantage in that incomplete melting occurs, and if it exceeds 285 ° C., there is a disadvantage in that the molecular weight is lowered due to thermal decomposition due to high heat. In addition, if the spinning temperature is less than 250 ℃ has a disadvantage of poor spinning processability, if it exceeds 285 ℃ has the disadvantage of lowering the physical properties of the final yarn.

Hereinafter, the present invention will be described in detail with reference to the following preferred embodiments, but the present invention is not limited to the following examples.

Various physical property measurement / evaluation method in the present invention is as follows.

* Tactile: Five experts were evaluated by applying the sensory evaluation method in five stages of very good, excellent, fair, poor and very poor. Specifically, 4 or more were judged to be excellent, 3 were good, judged to be excellent, 2 were judged to be good, and 1 or less were judged to be good.

* Dyeability: After dyeing each warp specimen with normal dye at 100 ℃ and washing with water, each sample is evaluated by dyeing from 5 to 1 by comparing with standard color table. Higher value means better dyeability. .

* Strength retention rate: The strength retention rate of the yarn after alkali reduction is calculated by the following equation.

Equation 1 --------- Strength Retention Rate (%) = (A / B) × 100

(Wherein, A is the strength of the island-in-the-sea microfiber treated with 95 ° C. aqueous sodium hydroxide solution (1% concentration) for 30 minutes, and B is the strength of the island-in-the-sea microfiber treated before being treated with the aqueous solution of caustic soda.)

* Tensile strength: Tensile strength was measured by the following method. Using the tensile strength tester, the sample was determined to have a grip distance of 50 mm and a tensile speed of 12 mm / min, and the strength at the time of cutting was measured and divided by the fineness of the sample.

* Fineness: Fineness was measured by the following method. Wind 90 times (90m) using a wrap reel (1m / round). The weight of the wound sample is measured, and this value is multiplied by 100 to measure the fineness.

Example 1

The dissolved component / matrix component ratio is 30/70 in the temperature environment of the extruder, as shown in Table 1, using a water-soluble polyester having an intrinsic viscosity of 0.5 level as a dissolved component and a polytrimethylene terephthalate having an intrinsic viscosity of 1.0 level as a matrix component. After supplying to the spinning block in the weight ratio and uniformly mixing in the distribution plate of the spinning pack, using a nozzle with a total of 48 holes discharge hole in mono 3 denier at a spinning temperature of 270 ℃ by spinning at 4000m / minute Yarn was prepared. The yarn was subjected to weight loss treatment using alkali to prepare an ultrafine polytrimethylene terephthalate composite fiber for artificial leather having a thickness of 0.06 denier. The composite fiber was prepared using a warp knitting machine, and the various ultra-fine matrix components were expressed by dissolving the usable polyester using alkali, and then measured various physical properties. The results are shown in Table 1.

Example 2

Except that the ratio of the dissolved component / matrix component to 20/80 weight ratio, yarns and warp knitted fabrics were prepared under the same conditions and processes as in Example 1 to measure various physical properties and the results are shown in Table 1.

Example 3

Except for using a nozzle having a total of 72 holes discharge holes, the yarns and warp knitted fabrics were prepared under the same conditions and processes as in Example 1, and various physical properties were measured. The results are shown in Table 1.

Example 4

Except that the spinning temperature was set to 265 ° C, the yarns and warp knitted fabrics were prepared under the same conditions and processes as in Example 1, and various physical properties were measured. The results are shown in Table 1 below.

Example 5

Except for setting the spinning temperature to 275 ℃ yarn and warp knitted fabrics were prepared under the same conditions and processes as in Example 1 to measure a variety of physical properties and the results are shown in Table 1.

Comparative Example 1

Except the extruder temperature of the matrix component was 285 ℃ to prepare a yarn and warp knitted fabric under the same conditions as in Example 1 and measured various physical properties and the results are shown in Table 1.

division Extruder temperature (℃) Spinning temperature (℃) touch Yarn island Yarn tensile strength Strength retention rate (%) Dyeability Soluble Polyester matrix Total tensile strength (g / d) Tensile strength after weight loss (g / d) Example 1 275 260 270 Very good 0.06 3.2 3.3 103 4 Example 2 275 260 270 Great 0.07 3.0 3.0 100 4 Example 3 275 260 270 Very good 0.04 3.3 3.3 100 5 Example 4 275 260 265 Very good 0.06 3.2 3.4 106 4 Example 5 275 260 275 Very good 0.06 2.9 2.9 100 5 Comparative Example 1 275 285 270 Great 0.06 3.0 2.6 87 4

Fineness according to the present invention as shown in Table 1 above The ultrafine polytrimethylene terephthalate composite fiber for artificial leather having ultrafine fineness of 0.1 ~ 0.001 deniers was obtained. The prepared yarns were made of non-woven fabrics, woven fabrics, and knitted fabrics, and then dissolved by dissolving the usable polyester in an alkaline aqueous solution.

As described above, the ultra-fine polytrimethylene terephthalate fiber for artificial leather prepared by the present invention has a fineness of 0.1 to 0.001 denier, and has a super fineness and excellent solubility in solution in a distribution plate of a composite spinning pack device. After the spinning through the nozzle and the spun yarn is made of non-woven fabric, woven fabric, knitted fabric, and by dissolving the usable polyester in alkaline aqueous solution, it is possible to produce an artificial leather having excellent feel, excellent dyeability capable of low-temperature atmospheric pressure dyeing.

Claims (6)

A composite fiber having polytrimethylene terephthalate (PTT) having an intrinsic viscosity of 0.8 to 1.2 as a matrix component (A) and an alkali-soluble polyester having an intrinsic viscosity of 0.4 to 0.7 as a dissolving component (B). An ultrafine polytrimethylene terephthalate composite fiber for artificial leather, characterized by a weight ratio of 40/60 to 90/10 and a strength retention ratio of the yarn before weight loss after weight loss of 90% or more. The ultrafine polytrimethylene terephthalate composite fiber for artificial leather according to claim 1, wherein the fineness after alkali dissolution is 0.1 to 0.001 denier. The method of claim 1, wherein the alkali-soluble polyester as the dissolving component (B) is ultrafine for artificial leather, characterized in that copolymerization of polyethylene terephthalate and polyethylene glycol and / or 5- sodium sulfoisophthalic acid 3-20 mol%. Polytrimethylene Terephthalate Composite Fiber. The polytrimethylene terephthalate (PTT) having an intrinsic viscosity of 0.8 to 1.2 was used as the matrix component (A), and the alkali-soluble polyester having an intrinsic viscosity of 0.4 to 0.7 was used as the dissolving component (B). Melt-extruded at a ratio of / 60 to 90/10 weight ratio and supplied to the spinning block, mixed in the distribution plate of the spinning pack, and spun at a draw ratio of 1.5 to 3.5 and a spinning winding speed of 2,500 to 5,000 m / min. Preparation of the yarn by heat treatment and alkali treatment, fineness of 0.1 ~ 0.001 denier, after the weight loss of the ultra-fine polytrimethylene terephthalate composite fiber for artificial leather, characterized in that the strength retention of the yarn before weight loss is 90% or more. Way. The method of manufacturing an ultrafine polytrimethylene terephthalate composite fiber for artificial leather according to claim 4, wherein the extruder has a temperature of 245-285 ° C and a spinning temperature of 250-285 ° C. 5. The preparation of ultrafine polytrimethylene terephthalate composite fiber for artificial leather according to claim 4, wherein the A / B ratio of the matrix component (A) and the dissolving component (B) is 60/40 to 80/20. Way.