KR100646652B1 - A process of preparing for the polyvinylalcohol yarn with high strength - Google Patents

A process of preparing for the polyvinylalcohol yarn with high strength Download PDF

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KR100646652B1
KR100646652B1 KR1020030033281A KR20030033281A KR100646652B1 KR 100646652 B1 KR100646652 B1 KR 100646652B1 KR 1020030033281 A KR1020030033281 A KR 1020030033281A KR 20030033281 A KR20030033281 A KR 20030033281A KR 100646652 B1 KR100646652 B1 KR 100646652B1
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polyvinyl alcohol
high strength
fiber
producing
coagulation
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KR20040101614A (en
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정종철
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주식회사 코오롱
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers

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Abstract

본 발명은 고강도 폴리비닐알코올 섬유의 제조방법에 관한 것으로서, 폴리비닐알코올을 유기용매에 용해시켜 방사도프를 제조한 후 이를 공기중으로 방사하고, 계속해서 응고액(3a)이 방사되는 섬유 축 방향과 동일한 방향(수직하단 방향)으로 흐르는 응고욕조(3)에서 응고하여 미연신사를 제조하고, 계속해서 상기 미연신사를 15배 이상의 연신비율로 연신한 후 권취함을 특징으로 한다. 본 발명은 섬유 내에 잔류하는 유기용매를 응고액으로 완전하게 치환, 제거할 수 있어서 겔 네트워크 구조를 갖는 미연신사를 제조할 수 있다. 그 결과 본 발명은 열연신 공정에서 섬유 내 분자사슬을 연신축 방향으로 최대한 배향시킬 수 있다.
The present invention relates to a method for producing high strength polyvinyl alcohol fibers, comprising dissolving polyvinyl alcohol in an organic solvent to prepare a spinning dope and spinning it into air, followed by the fiber axis direction in which the coagulating solution 3a is spun. A non-drawn yarn is produced by coagulation in a coagulation bath 3 flowing in the same direction (vertical bottom direction), followed by winding the undrawn yarn at a draw ratio of 15 times or more. The present invention can completely replace and remove the organic solvent remaining in the fiber with a coagulation solution, thereby producing an undrawn yarn having a gel network structure. As a result, in the present invention, the molecular chain in the fiber can be oriented in the stretching axis direction as much as possible in the heat drawing process.

고강도, 폴리비닐알코올, 섬유, 연신, 응고, 방사방향, 순환펌프High Strength, Polyvinyl Alcohol, Fiber, Stretched, Solidified, Radial, Circulating Pump

Description

고강도 폴리비닐알코올 섬유의 제조방법 {A process of preparing for the polyvinylalcohol yarn with high strength}Process for preparing high strength polyvinyl alcohol fiber {A process of preparing for the polyvinylalcohol yarn with high strength}

도 1은 종래방법의 공정 개략도1 is a process schematic diagram of a conventional method

도 2는 본 발명의 공정 개략도2 is a process schematic diagram of the present invention.

※ 도면 중 주요 부분에 대한 부호 설명※ Explanation of the main parts of the drawings

1 : 방사블록 2 : 방사된 섬유 3 : 응고욕조 1: spinning block 2: spun fiber 3: coagulation bath

3a : 응고액 4 : 권취 로울러 5 : 순환펌프3a: Coagulation liquid 4: Winding roller 5: Circulating pump

본 발명은 고강도 폴리비닐알코올 섬유의 제조방법에 관한 것이다.The present invention relates to a method for producing high strength polyvinyl alcohol fibers.

보다 구체적으로, 본 발명은 겔방사공정에 있어서 응고욕조 구성을 개선하므로서 안정적인 겔 네트워크 구조를 갖는 미연신사를 제조하고, 이를 열연신 공정에서 높은 열연신배열로 연신하여 고강도 폴리비닐알코올 섬유를 제조하는 방법에 관한 것이다.More specifically, the present invention provides a non-stretched yarn having a stable gel network structure by improving the configuration of the coagulation bath in the gel spinning process, and stretched it with a high thermal stretching arrangement in the heat stretching process to produce a high strength polyvinyl alcohol fiber It is about a method.

폴리비닐알코올 섬유를 제조하는 종래 방법으로는 용액방사방식, 습식방사방식, 건식방사방식, 용융방사방식, 가교방사방식 등이 있었다. Conventional methods for preparing polyvinyl alcohol fibers include solution spinning, wet spinning, dry spinning, melt spinning, crosslinking spinning and the like.                         

그러나 상기 방사방식들은 분자량에 관계없이 폴리비닐알코올의 교대배열성이 떨어져서 일반적인 방사액의 농도에서는 겔화가 일어나지 않아 고강도 폴리비닐알코올 섬유 제조에는 부적합하였다. 그 결과 최근에는 겔방사법으로 고강도 폴리비닐알코올 섬유를 제조하고 있다. 폴리비닐알코올은 하드록실(Hydroxyl)기가 있어서 다른 합성섬유가 갖지 못하는 장점도 있지만, 이로 인한 수소결합이 많아 연신이 곤란한 문제도 갖고 있다.However, the spinning methods are not suitable for the production of high strength polyvinyl alcohol fibers because gelling does not occur at the concentration of the general spinning solution due to the alternating arrangement of polyvinyl alcohol regardless of molecular weight. As a result, recently, high strength polyvinyl alcohol fibers have been manufactured by gel spinning. Polyvinyl alcohol has a hard hydroxyl (Hydroxyl) group has the advantage that other synthetic fibers do not have, but due to the hydrogen bonds due to this has a problem that is difficult to stretch.

종래 상기 문제를 해결하기 위해서는 고배율 연신이 가능하도록 안정적인 겔 네트워크 구조를 갖는 미연신사를 일차적으로 제조하는 것이 필수적으로 요구되어 왔다.In order to solve the above problem, it has been required to first prepare an undrawn yarn having a stable gel network structure to enable high magnification drawing.

따라서, 지금까지 안정적인 겔 네트워크 구조를 갖는 미연신사를 제조하기 위해서 방사도프의 농도, 방사온도 및 구금내경 등을 조절하는 다양한 방법들이 시도되고 있다. 그러나, 종래 방법들은 응고욕조 내의 응고액이 도 1과 같이 정적인 상태를 유지하고 있어서 폴리비닐알코올 섬유 내에 잔류하는 유기용매를 완전하게 치환, 제거할 수 없다.Therefore, various methods for controlling the concentration of spinning dope, spinning temperature and inner diameter of the spin dope have been attempted to produce undrawn yarn having a stable gel network structure. However, in the conventional methods, the coagulating solution in the coagulation bath remains in a static state as shown in FIG. 1, and thus, the organic solvent remaining in the polyvinyl alcohol fibers cannot be completely replaced or removed.

응고액이 정적인 상태로 유지되는 도 1이 응고욕조로 들어간 방사된 필라멘트는 응고욕조의 상단에서 10cm가 되는 지점부터 나선과 같은 회전 거동을 하게 된다. 이는 방사된 필라멘트 내 유기용매가 메탄올 등의 응고액으로 치환되면서 생기는 현상으로서 필라멘트 내 구조를 불안정하게 만들 우려가 높다. The spinning filament of FIG. 1 into the coagulation bath while the coagulation solution remains in a static state causes a spiral-like rotational behavior from the point of 10 cm from the top of the coagulation bath. This is a phenomenon that occurs when the organic solvent in the spun filament is replaced with a coagulating solution such as methanol, and thus, the structure of the filament is unstable.

구체적으로 상기 회전거동은 필라멘트 표면 구조와 내부 구조를 불균형하게 하며, 내부적으로 겔 네트워크의 겹침이나 엉킴을 일으켜서 열연신시 분자의 고배 향을 어렵게 하게 된다.Specifically, the rotational behavior unbalances the filament surface structure and the internal structure, and internally causes overlapping or entanglement of the gel network, thereby making it difficult to align the molecules at the time of hot stretching.

이로 인해 종래 방법 등은 안정적인 겔 네트워크 구조를 갖는 미연신사 제조가 곤란하였고, 그 결과 고배율 연신에 의한 고강도 폴리비닐알코올 섬유 제조도 곤란하였다.For this reason, conventional methods and the like have been difficult to produce undrawn yarn having a stable gel network structure, and as a result, it is also difficult to produce high strength polyvinyl alcohol fibers by high magnification drawing.

본 발명은 이와 같은 종래 문제점 등을 해소하기 위하여 고강도 폴리비닐알코올 섬유를 겔방사법으로 제조할 때 응고욕조 내의 응고액을 방사된 필라멘트의 진행방향과 동일한 수직하단 방향(이하 "방사방향"이라고 한다.)으로 흐르게 하여 섬유내 잔류 유기용매를 완전하게 치환, 제거하므로서 열연신 공정에서 배향이 잘 되도록 하는 겔 네트워크 구조를 갖는 미연신사를 제조하고, 계속해서 이를 15배 이상의 고배율로 열연신하여 고강도 폴리비닐알코올 섬유를 제조하는 방법을 제공하고자 한다.In order to solve such a conventional problem and the like, the coagulating liquid in the coagulation bath is referred to as a vertical bottom direction (hereinafter referred to as a "radiation direction") when the high-strength polyvinyl alcohol fiber is produced by gel spinning. Unstretched yarns having a gel network structure which completely displaces and removes the residual organic solvent in the fiber and is well oriented in the hot drawing process, and is then hot drawn at a high magnification of 15 times or more to obtain high strength polyvinyl chloride. It is intended to provide a method of making alcohol fibers.

이와 같은 과제를 달성하기 위해 본 발명은 고강도 폴리비닐알코올 섬유를 겔방사법으로 제조할 때 응고욕조(3)내의 응고액(3a)을 방사방향으로 흘려주는 것을 특징으로 한다. In order to achieve the above object, the present invention is characterized by flowing the coagulating liquid (3a) in the coagulation bath (3) in the radial direction when producing a high-strength polyvinyl alcohol fiber by a gel spinning method.

이하, 첨부된 도면 등을 통하여 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

먼저, 본 발명에서는 폴리비닐알코올을 유기용매에 용해시켜 방사도프를 제조한 후 이를 공기중으로 방사한다.First, in the present invention, polyvinyl alcohol is dissolved in an organic solvent to prepare a spinning dope, and then it is spun into air.

방사도프 제조에 사용되는 폴리비닐알코올의 중합도는 1,000-9,000인 것이 바람직하다. 중합도가 1,000 미만인 경우에는 고분자 사슬이 짧기 때문에 긴 사슬인 경우에 비해 안정적인 겔 네트워크 구조를 이루지 못해 25g/d 이상의 원사강도를 얻기 어렵게 될 수 있다.It is preferable that the polymerization degree of the polyvinyl alcohol used for manufacture of spinning dope is 1,000-9,000. If the degree of polymerization is less than 1,000, because the polymer chain is short, it may be difficult to obtain a yarn strength of 25g / d or more than the long chain because it does not form a stable gel network structure.

유기용매로는 디메틸 설폭사이드(Dimethy Sulfoxide, 이하 "DMSO"라 한다.) 등이 사용된다.As the organic solvent, dimethyl sulfoxide (hereinafter referred to as "DMSO") is used.

한편 상기 방사도프의 농도는 10-20 중량% 인 것이 바람직하다. 10 중량% 미만인 경우에는 용매에 비해 고분자 사슬의 양이 적어서 충분한 강도를 갖는 원사제조가 어렵고, 20중량%를 초과하는 경우에는 점도가 높아 방사성이 저하될 수 있다.Meanwhile, the concentration of the spinning dope is preferably 10-20% by weight. If the amount is less than 10% by weight, the amount of polymer chains is less than that of the solvent, which makes it difficult to manufacture a yarn having sufficient strength. If the amount is more than 20% by weight, the radioactivity may be lowered due to the high viscosity.

다음으로는, 계속해서 공기중으로 방사된 섬유(필라멘트)를 응고액(3a)이 방사방향으로 흐르는 응고욕조(3) 내로 통과시켜 응고하여 미연신사를 제조하고, 계속해서 상기 미연신사를 15배 이상의 연신배율로 연신, 권취하여 고강도 폴리비닐알코올 섬유를 제조한다. 상기 응고액(3a)으로는 100% 메탄올 등을 사용한다.Next, the fiber (filament) spun into the air is subsequently passed through the coagulation bath 3 in which the coagulating liquid 3a flows in the radial direction to coagulate to produce an undrawn yarn, and the undrawn yarn is then 15 times or more. Stretching and winding in a draw ratio to produce a high strength polyvinyl alcohol fiber. As the coagulating solution 3a, 100% methanol or the like is used.

도 2는 본 발명 중 응고 공정의 공정 개략도이다.2 is a process schematic diagram of the solidification process of the present invention.

본 발명에서는 상기와 같이 방사된 섬유 내에 잔존하는 유기용매를 완전하게 치환, 제거하기 위하여 응고욕조(3) 내의 응고액(3a)을 방사되는 섬유와 동일한 방향(방사방향), 다시 말해 응고욕조의 수직하단 방향으로 흐르도록 하는 것을 특징으로 한다.In the present invention, in order to completely replace and remove the organic solvent remaining in the spun fiber as described above, the coagulating solution 3a in the coagulation bath 3 is the same direction as the spun fiber (radiation direction), that is, Characterized in that to flow in the vertical bottom direction.

방사된 섬유(필라멘트) 내에 유기용매가 계속 잔류하는 경우에는 미연신사의 권취시 필라멘트 상호간에 접착이 심하게 일어나서 해사가 어렵게 되고, 연신공정에서 물성저하의 원인이 되며, 열연신시 변색원인도 될 수 있다. If the organic solvent continues to remain in the spun fiber (filament), the adhesion between the filaments is severe during winding of the unstretched yarn, making it difficult to dissolve, and may cause discoloration during the stretching process. .                     

섬유 내 잔류 유기용매를 완전하게 제거하기 위해서는 방사된 섬유가 응고액과 충분하게 접촉될 수 있어야 한다.In order to completely remove the residual organic solvent in the fiber, the spun fiber must be able to be in sufficient contact with the coagulant.

이를 위해 종래에는 도 1과 같이 응고액이 정적상태를 갖는 응고욕조(3)의 길이를 늘려 방사된 섬유가 상기 응고욕조(3) 내에 체류하는 시간을 연장시켜주는 방법이 주로 사용되어 왔다.To this end, conventionally, as shown in FIG. 1, a method of extending the length of the coagulated bath 3 in which the coagulated liquid has a static state to extend the residence time of the spun fiber in the coagulated bath 3 has been mainly used.

그러나 상기 종래 방법은 앞에서 설명한 바와 같이 응고욕조(3)를 통과하는 섬유가 회전거동을 나타내면서 겔 네트워크의 겹침현상이나 엉킴현상을 유발시켜 열연신시 분자의 고배향을 어렵게 하는 문제가 있었다.However, the conventional method has a problem in that the fiber passing through the coagulation bath (3) exhibits rotational behavior, causing overlapping or entanglement of the gel network, making it difficult to align the molecules at the time of hot stretching.

본 발명에서는 이와 같은 문제점을 해결하기 위하여 도 2에 도시된 바와 같이 응고욕조(3)의 하단부에 순환펌프(5)를 설치하여 응고욕조(3)의 하단에 있는 응고액(3a)을 응고욕조(3)의 상단으로 순환시켜 응고욕조(3) 내의 응고액(3a)이 방사방향(수직하단 방향)으로 흐르도록 한다.In the present invention, in order to solve such a problem, as shown in FIG. 2, a circulation pump 5 is installed at the lower end of the coagulation bath 3 to coagulate the coagulation bath 3a at the bottom of the coagulation bath 3. It circulates to the upper end of (3), and the coagulating liquid 3a in the coagulation bath 3 flows in a radial direction (vertical bottom direction).

다시 말해, 응고욕조(3)의 상단에 위치하는 응고액(3a)은 자중에 의해 아래로 흘러내리게 되고, 하단으로 흘러내린 응고액(3a)은 순환펌프(5)에 의해 다시 상단으로 순환하게 된다.In other words, the coagulation liquid 3a located at the top of the coagulation bath 3 flows down by its own weight, and the coagulation liquid 3a flowing down to the bottom flows back to the top by the circulation pump 5. do.

이와 같은 응고액(3a)의 순환에 의해 섬유 내 유기용매의 용출이 용이하게 되고, 이로 인해 미연신사의 섬유축 방향으로 겔 네트워크 구조가 가지런히 형성되어 후공정에서 연신시 연신성이 좋아지게 된다.The circulation of the coagulating solution 3a facilitates the elution of the organic solvent in the fiber, which leads to the formation of a neat network structure in the fiber axis direction of the unstretched yarn, which improves the stretchability at the time of stretching in a later step. .

상기 구조를 갖는 미연신사는 열연신 공정에서 섬유축 방향으로 분자쇄의 배향이 극대화되어 최종 폴리비닐알코올 섬유의 강도가 향상된다. 그 결과, 본 발 명으로 제조된 폴리비닐알코올 섬유는 표면이 균일하고 원형단면을 갖고 있으며 25g/d 이상의 원사강도를 발현한다.The non-drawn yarn having the above structure maximizes the orientation of the molecular chain in the fiber axis direction in the heat drawing process, thereby improving the strength of the final polyvinyl alcohol fiber. As a result, the polyvinyl alcohol fibers produced according to the present invention have a uniform surface, a circular cross section, and express a yarn strength of 25 g / d or more.

이하, 실시예 및 비교실시예를 통하여 본 발명을 보다 구체적으로 살펴본다. 그러나, 본 발명은 하기 실시예에만 한정되는 것은 아니다.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.

실시예 1Example 1

파우더 형태로서 중합도가 4,000이고 검화도가 99.8 몰%인 폴리비닐알코올을 디메틸설폭사이드(DMSO) 100 %에 12 중량%의 도프농도로 혼합하여 상온에서 팽윤시킨 후 110℃에서 용해하여 폴리비닐알코올 방사도프를 제조하였다. 계속해서 상기 방사도프를 겔방사법으로 공기 중에 방사한 후, 이를 100% 메탄올의 응고액이 방사방향으로 흐르는 응고욕조 내로 통과시키면서 응고하고, 계속해서 18배의 연신배율로 열연신하여 폴리비닐알코올 섬유를 제조하였다. 이때 에어캡의 길이는 15mm로 하였고, 메탄올의 온도는 상온으로 유지하였다. 제조한 폴리비닐알코올 섬유의 인장강도 및 신도를 측정한 결과는 표 1과 같다.Polyvinyl alcohol having a polymerization degree of 4,000 and a saponification degree of 99.8 mol% as a powder form was mixed with 100% of dimethyl sulfoxide (DMSO) at a doping concentration of 12% by weight, swelled at room temperature, dissolved at 110 ° C, and then spun at polyvinyl alcohol. The dope was prepared. Subsequently, the spinning dope was spun into the air by gel spinning, and then coagulated while passing through the coagulation bath in which 100% methanol coagulation liquid flows in the radial direction, followed by thermal stretching at 18 times the draw ratio to polyvinyl alcohol fiber. Was prepared. At this time, the length of the air cap was 15mm, the temperature of methanol was maintained at room temperature. Table 1 shows the results of measuring tensile strength and elongation of the manufactured polyvinyl alcohol fiber.

실시예 2Example 2

방사도프의 농도를 15 중량%로 변경한 것을 제외하고는 실시예 1과 동일한 조건으로 폴리비닐알코올 섬유를 제조하였다. 제조한 폴리비닐알코올 섬유의 인장강도 및 신도를 측정한 결과는 표 1과 같다.A polyvinyl alcohol fiber was prepared under the same conditions as in Example 1 except that the concentration of the spinning dope was changed to 15% by weight. Table 1 shows the results of measuring tensile strength and elongation of the manufactured polyvinyl alcohol fiber.

비교실시예 1Comparative Example 1

응고액이 방사방향으로 흐르지 않고, 정적인 상태를 유지하는 기존의 응고욕조를 사용한 것을 제외하고는 실시예 1과 동일한 조건으로 폴리비닐알코올 섬유를 제조하였다. 제조한 폴리비닐알코올 섬유의 인장강도 및 신도를 측정한 결과는 표 1과 같다.A polyvinyl alcohol fiber was prepared under the same conditions as in Example 1 except that the coagulating solution did not flow in a radial direction and used a conventional coagulation bath that maintained a static state. Table 1 shows the results of measuring tensile strength and elongation of the manufactured polyvinyl alcohol fiber.

비교실시예 2Comparative Example 2

응고액이 방사방향으로 흐르지 않고, 정적인 상태를 유지하는 기존의 응고욕조를 사용한 것을 제외하고는 실시예 2과 동일한 조건으로 폴리비닐알코올 섬유를 제조하였다. 제조한 폴리비닐알코올 섬유의 인장강도 및 신도를 측정한 결과는 표 1과 같다.A polyvinyl alcohol fiber was prepared under the same conditions as in Example 2, except that the coagulating liquid did not flow in a radial direction and used a conventional coagulation bath that maintained a static state. Table 1 shows the results of measuring tensile strength and elongation of the manufactured polyvinyl alcohol fiber.

<표 1> 물성측정결과<Table 1> Measurement Results

구분division 인장강도(g/d)Tensile strength (g / d) 신도(%)Elongation (%) 실시예 1Example 1 2525 88 실시예 2Example 2 2828 99 비교실시예 1Comparative Example 1 1818 1010 비교실시예 2Comparative Example 2 2020 88

본 발명에 있어서 인장강도 및 신도는 인스트롱 기기를 사용하여 시료길이 10cm 및 인장속도 100rpm 조건하에서 측정하였다.In the present invention, tensile strength and elongation were measured under conditions of 10 cm sample length and 100 rpm tensile speed using an Instron instrument.

본 발명은 섬유 내에 잔류하는 유기용매를 완전하게 치환, 제거할 수 있어서 겔 네트워크 구조를 갖는 미연신사를 제조할 수 있고, 이로 인해 본 발명은 상기 미연신사의 열연신 공정에서 분자사슬을 연신축 방향으로 최대한 배향시킬 수 있다. 그 결과 본 발명으로 제조된 폴리비닐알코올 섬유는 연신축 방향으로 분자사슬이 최대한 배향되어 25g/d 이상의 고강도를 갖는다. The present invention can completely displace and remove the organic solvent remaining in the fiber to produce a non-drawn yarn having a gel network structure, and thus the present invention stretches the molecular chain in the heat-stretching process of the non-drawn yarn Can be oriented as much as possible. As a result, the polyvinyl alcohol fiber produced by the present invention has a high strength of 25g / d or more as the molecular chain is oriented in the stretching axis direction as much as possible.

Claims (6)

폴리비닐알코올을 유기용매에 용해시켜 방사도프를 제조한 후 이를 공기중으로 방사하고, 계속해서 응고액(3a)이 방사되는 섬유 축 방향과 동일한 방향(수직하단 방향)으로 흐르는 응고욕조(3)에서 응고하여 미연신사를 제조하고, 계속해서 상기 미연신사를 15배 이상의 연신비율로 연신한 후 권취함을 특징으로 하는 고강도 폴리비닐알코올 섬유의 제조방법.After dissolving polyvinyl alcohol in an organic solvent to prepare a spinning dope, it is spun into air, and then in a coagulation bath (3) flowing in the same direction (vertical bottom direction) as the fiber axis direction in which the coagulating liquid 3a is spun. A method for producing a high strength polyvinyl alcohol fiber characterized by solidifying to prepare an undrawn yarn, and then stretching the undrawn yarn at a draw ratio of 15 times or more. 1항에 있어서, 응고욕조(3)의 하단부에 순환펌프(5)를 설치하여 응고액(3a)을 순환시키는 것을 특징으로 하는 고강도 폴리비닐알코올 섬유의 제조방법.The method for producing high strength polyvinyl alcohol fibers according to claim 1, wherein a circulation pump (5) is provided at the lower end of the coagulation bath (3) to circulate the coagulation liquid (3a). 1항에 있어서, 폴리비닐알코올의 중합도가 1,000-9,000인 것을 특징으로 하는 고강도 폴리비닐알코올 섬유의 제조방법.The method of producing a high strength polyvinyl alcohol fiber according to claim 1, wherein the degree of polymerization of polyvinyl alcohol is 1,000 to 9,000. 1항에 있어서, 방사도프의 농도가 10-20 중량%인 것을 특징으로 하는 고강도 폴리비닐알코올 섬유의 제조방법.The method of producing a high strength polyvinyl alcohol fiber according to claim 1, wherein the concentration of the spinning dope is 10-20% by weight. 1항에 있어서, 응고액(3a)이 메탄올인 것을 특징으로 하는 고강도 폴리비닐알코올 섬유의 제조방법.The method for producing a high strength polyvinyl alcohol fiber according to claim 1, wherein the coagulating solution (3a) is methanol. 1항에 있어서, 유기용매가 디메틸설폭사이드(Dimethyl sulfoxide)인 것을 특징으로 하는 고강도 폴리비닐알코올 섬유의 제조방법.The method of producing a high strength polyvinyl alcohol fiber according to claim 1, wherein the organic solvent is dimethyl sulfoxide.
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CN105113041A (en) * 2015-09-15 2015-12-02 苏州顺唐化纤有限公司 Method for preparing corrosion-resistant polyvinyl alcohol fiber

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KR20010017822A (en) * 1999-08-14 2001-03-05 박호군 A method and equipment to induct fibre filaments
KR20020048780A (en) * 2000-12-18 2002-06-24 조 정 래 Process for preparation of high-tenacity polyvinyl alcohol fiber with hot-water resistance

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KR20010017822A (en) * 1999-08-14 2001-03-05 박호군 A method and equipment to induct fibre filaments
KR20020048780A (en) * 2000-12-18 2002-06-24 조 정 래 Process for preparation of high-tenacity polyvinyl alcohol fiber with hot-water resistance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105113041A (en) * 2015-09-15 2015-12-02 苏州顺唐化纤有限公司 Method for preparing corrosion-resistant polyvinyl alcohol fiber

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