KR970007680B1 - Method for cooling polymer melt - Google Patents
Method for cooling polymer melt Download PDFInfo
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- KR970007680B1 KR970007680B1 KR1019940020661A KR19940020661A KR970007680B1 KR 970007680 B1 KR970007680 B1 KR 970007680B1 KR 1019940020661 A KR1019940020661 A KR 1019940020661A KR 19940020661 A KR19940020661 A KR 19940020661A KR 970007680 B1 KR970007680 B1 KR 970007680B1
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- cooling
- spinneret
- fiber
- cooling wind
- nozzle
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
제1도는 본 발명 용융 폴리머 냉각방법을 나타낸 단면 개략도.1 is a schematic cross-sectional view showing a molten polymer cooling method of the present invention.
제2도는 방출된 폴리머의 위치에 따른 온도분포도.2 is a temperature distribution plot of the location of the polymer released.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 내측냉각풍 2 : 외측냉각풍1: inside cooling wind 2: outside cooling wind
3 : 방사구금고정부위 4 : 방출된 폴리머3: spinneret block 4: released polymer
5 : 팩(pack)본체 6 : 다공성 소결체5: pack body 6: porous sintered body
7 : 노즐7: nozzle
A, B : 선행 냉각방법의 온도분포A, B: temperature distribution of the preceding cooling method
C : 본 발명의 냉각방법의 온도분포C: temperature distribution of the cooling method of the present invention
본 발명은 용융 폴리머의 냉각방법에 관한 것으로, 더욱 상세하게는 용융된 폴리머가 노즐을 통하여 방출된 후부터 섬유형태로 고화되기 까지의 과정에서 냉각을 사용되는 냉각풍을 방사구금의 외측 및 내측에서 공급하여 섬유의 균제도와 공정성을 향상시키기 위한 방법에 관한 것이다.The present invention relates to a method for cooling a molten polymer, and more particularly, to supply cooling air from the outside and the inside of the spinneret using cooling in the process from when the molten polymer is discharged through the nozzle until it solidifies into a fiber form. It relates to a method for improving the uniformity and fairness of the fiber.
일반적으로 용융방사를 통하여 제조되는 합성섬유는 용도에 따라 단위제품이 전혀 끊어져 있지 않은 장섬유와 소정의 길이로 일정하게 끊어져 있는 단섬유로 구분되고 있다.In general, synthetic fibers produced through melt spinning are classified into long fibers in which unit products are not cut at all and short fibers constantly cut to a predetermined length, depending on the use.
장섬유의 경우에 있어서 생산성의 증가는 용융물의 방사속도를 높여 주는 방법과 공정단계를 연속으로 하는 소위 방사-연신 일체화 설비(spin-draw 설비)를 통해서 획기적인 발전을 보였다. 한편, 단섬유에 있어서는 용융된 폴리머가 방출되는 각 방사구금에 가능한 많은 수의 노즐을 만들어 방사구금당 생산량을 늘리는 기술이 사용되고 있다.In the case of long fibers, the increase in productivity has been markedly improved through the so-called spin-draw facility, which is a method of increasing the spinning speed of the melt and a continuous process step. On the other hand, in the short fibers, a technique is used to increase the production per spinneret by making as many nozzles as possible for each spinneret in which molten polymer is discharged.
이러한 기술에 있어서는 최대의 노즐수를 부여하기 위한 노즐 배열방법과, 노즐간의 간격이 좁아짐으로 인한 용융물간의 접합 및 절단 현상을 방지하기 위한 방법이 연구되고 있다.In this technique, a method of arranging nozzles for providing the maximum number of nozzles and a method for preventing joining and cutting between melts due to narrowing of the gaps between nozzles have been studied.
또한, 미국특허 제4,285,646호, 제3,969,462호, 제3,858,386호 등에서는 냉각풍의 공급을 내측에서 공급하는 방법 등이 제시되어 있으나, 이러한 기술은 냉각풍이 내측에서만 공급되기 때문에 제2도의 (B)에 나타나 있듯이 균일한 냉각효과를 얻기 어려운 단점을 보이고 있다.In addition, U.S. Patent Nos. 4,285,646, 3,969,462, 3,858,386 and the like disclose a method of supplying cooling air from the inside, but such a technique is shown in FIG. 2B because the cooling air is supplied only from the inside. As shown, it is difficult to obtain a uniform cooling effect.
더욱이 내측 냉각풍 공급장치가 노즐면 또는 팩 본체와 접촉하므로 노즐이 온도전도에 의해 냉각되어 용융 폴리머의 토출에 좋지 않은 영향을 미치게 된다.Furthermore, since the internal cooling wind supply device contacts the nozzle surface or the pack body, the nozzle is cooled by the temperature conduction, which adversely affects the discharge of the molten polymer.
이에 본 발명자들은 용융방사에 의한 합성섬유 단섬유 제조에 일반화 되어 있는 방사구금에 적합하면서도 섬유의 균제도를 향상시키고 인접한 용융물간의 접합현상을 해결하는 방법을 찾기 위하여 다각도로 연구 검토한 결과 본 발명에 이르게 되었다.Accordingly, the present inventors have studied various angles to find a method of improving the uniformity of fibers and solving the bonding phenomenon between adjacent melts while being suitable for spinnerets which are generalized in manufacturing synthetic fibers short fibers by melt spinning. It became.
따라서, 본 발명의 목적은 노즐을 통하여 방출되는 폴리머를 섬유형태로 고화시키기 위하여 냉각풍을 외측과 내측에서 동시에 공급함으로써 섬유의 균제도와 공정성을 향상시키는 방법을 제공하는 데에 있다.Accordingly, an object of the present invention is to provide a method for improving the uniformity and fairness of fibers by simultaneously supplying cooling air from the outside and the inside in order to solidify the polymer discharged through the nozzle in the form of fibers.
이하 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.
본 발명은 방사구금의 각 노즐을 통하여 방출되는 용융된 폴리머를 냉각시킴에 있어서, 방사구금의 고정부위(3)로 인하여 중심에 형성된 공간을 통하여 내측냉각풍(1)을 공급하고 외측에서는 외측냉각풍(2)을 공급하는 것을 특징으로 하는 용융 폴리머의 냉각방법이다.In the present invention, in cooling the molten polymer discharged through each nozzle of the spinneret, the inner cooling wind (1) is supplied through the space formed at the center due to the fixed part (3) of the spinneret and the outer cooling at the outside. It is a cooling method of the molten polymer characterized by supplying the air (2).
이하 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.
일반적인 합성섬유의 용융방사에 의한 단섬유 제조공정에서 노즐을 통하여 방출되는 폴리머의 냉각은 외측냉각풍(2)에 전적으로 의존하고 있는 바, 이러한 방식에서 냉각효과를 강화하는 방법은 냉각풍의 풍량을 올려주는 방법 뿐이었다.In the short fiber manufacturing process by melt spinning of general synthetic fibers, the cooling of the polymer discharged through the nozzle is completely dependent on the outer cooling wind (2). In this way, the method of enhancing the cooling effect increases the air volume of the cooling wind. It was only how to give.
그러나, 이러한 냉각방식에서는 방출된 폴리머에 미치는 냉각풍의 효과가 내측으로 갈수록 약해져 제2도의 (A)와 같은 온도분포가 나타날 수 밖에 없으며, 노즐의 수가 늘어날수록 더욱 편차가 커지게 된다.However, in such a cooling method, the effect of the cooling wind on the released polymer is weakened toward the inside, so that the temperature distribution as shown in FIG. 2 (A) is inevitably shown, and the deviation becomes larger as the number of nozzles increases.
또한, 냉각풍의 풍량이 올라가면 방출된 폴리머를 중심방향으로 조여 주는 현상이 나타나 용융물간의 접합이 심해진다.In addition, when the air volume of the cooling wind rises, the phenomenon of tightening the released polymer toward the center direction occurs, and the bonding between the melts is increased.
이에 비하여 본 발명의 방법에서는 동일한 풍량을 공급하더라도 보다 균일한 온도분포를 이루며 냉각풍이 내측과 외측으로 분산되어 들어가므로 방출된 폴리머가 조여질 우려가 없다.In contrast, in the method of the present invention, even if the same amount of air is supplied, a more uniform temperature distribution is achieved and cooling air is dispersed inward and outward so that the released polymer may not be tightened.
따라서, 제2도의 (C)에 나타나 있듯이 방출된 폴리머의 내측과 외측의 온도가 균일하기 때문에 내측에서 고화되어 생성되는 섬유와 외측에서 고화되어 생성되는 섬유간의 물성차가 적어져 균일한 품질의 섬유 다발을 얻게 되며, 공정중에서도 용융 폴리머의 접합에 의한 문제점도 해소되고 부수적으로 냉각풍의 효율성도 향상되는 효과를 얻을 수 있다.Therefore, as shown in (C) of FIG. 2, since the temperature of the inside and outside of the released polymer is uniform, the physical property difference between the fiber solidified on the inside and the fiber solidified on the outside decreases, resulting in uniform fiber bundles. In the process, the problem caused by the bonding of the molten polymer is also eliminated, and in addition, the efficiency of the cooling wind can be improved.
이하, 본 발명을 실시예를 통하여 더욱 구체적으로 설명하겠는 바, 본 발명이 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the Examples.
[실시예]EXAMPLE
상법으로 제조된 섬유용 폴리에스테르 수지를 사용하여 단섬유의 제조공정에서 노즐수 1,830개를 갖는 방사구금을 사용하여 고화된 각각의 섬유가 7.2gr/De'가 되도록 방사하는 과정에서, 온도 20℃의 냉각풍을 내측에서 2.0N㎥/hr 그리고 외측에서 2.0N㎥/hr로 불어 주었다. 고화된 섬유 다발은 연신비 4.0으로 연신한 뒤 염색을 하여 접합부위 및 사절로 인한 미연신 부분을 확인하였다.In the process of spinning the fiber solidified by using a spinneret having 1,830 nozzles in the manufacturing process of short fibers using a polyester resin for fibers manufactured by a commercial method to be 7.2 gr / De ', the temperature is 20 ° C. The cooling wind of was blown at 2.0 Nm 3 / hr from the inside and 2.0Nm 3 / hr at the outside. The solidified fiber bundles were drawn at a draw ratio of 4.0 and then stained to identify the unstretched portions due to junctions and trimming.
섬유속도 10만본당을 기준으로 3회 측정하여 접합부위는 평균 0.3건 발견되었으며, 미연신부분은 1건에 머물렸다. 강도의 편차를 균제도의 기준으로 삼아 10본을 측정하였다. 그 결과 편차는 최대 1.2%내에 머물러 우수한 결과를 얻게 되었다.Three measurements were made on the basis of the fiber speed per 100,000 bones, and the average number of joints was found 0.3. Ten measurements were made using the variation in intensity as a reference for the uniformity. As a result, the deviation remained within a maximum of 1.2%, yielding excellent results.
[비교예][Comparative Example]
노즐수 1,830개를 갖는 방사구금을 사용하여 고화된 각각의 섬유가 7.2gr/De'가 되도록 방사하는 과정에서 온도 20℃의 냉각풍을 내측에서 4.0N㎥/hr로 불어 주었다.In the process of spinning each fiber solidified using a spinneret having 1,830 nozzles to be 7.2 gr / De ', a cooling wind of 20 ° C was blown at 4.0 Nm3 / hr from the inside.
고화된 섬유 다발은 실시예에서와 같이 측정하여 접합부위는 평균 8.4건, 미연신은 11.6건 발견되었다. 강도의 편차는 최대 5.8%로서 실시예에 비하여 뒤떨어지는 결과를 얻었다.Solidified fiber bundles were measured as in the example, and the average number of bonding sites was 8.4 and 11.6 unstretched. The variation in the strength was at most 5.8%, which was inferior to the examples.
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KR1019940020661A KR970007680B1 (en) | 1994-08-22 | 1994-08-22 | Method for cooling polymer melt |
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KR1019940020661A KR970007680B1 (en) | 1994-08-22 | 1994-08-22 | Method for cooling polymer melt |
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KR970007680B1 true KR970007680B1 (en) | 1997-05-15 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100687597B1 (en) * | 2006-05-25 | 2007-02-27 | 주식회사 코오롱 | Air quenching apparatus for spinning of lyocell fibers, and method for preparation of lyocell fibers by using the same |
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1994
- 1994-08-22 KR KR1019940020661A patent/KR970007680B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100687597B1 (en) * | 2006-05-25 | 2007-02-27 | 주식회사 코오롱 | Air quenching apparatus for spinning of lyocell fibers, and method for preparation of lyocell fibers by using the same |
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