KR930010806B1 - Process for the preparation of filament having high strength and low shrinkage for industrial material - Google Patents
Process for the preparation of filament having high strength and low shrinkage for industrial material Download PDFInfo
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- KR930010806B1 KR930010806B1 KR1019910017358A KR910017358A KR930010806B1 KR 930010806 B1 KR930010806 B1 KR 930010806B1 KR 1019910017358 A KR1019910017358 A KR 1019910017358A KR 910017358 A KR910017358 A KR 910017358A KR 930010806 B1 KR930010806 B1 KR 930010806B1
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- filament
- high strength
- stretching
- low shrinkage
- yarn
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
Abstract
Description
본 발명은 고강력, 저수축 특성을 갖는 산업자재용 필라멘트의 제조방법에 관한 것이다.The present invention relates to a method for producing a filament for industrial materials having high strength, low shrinkage characteristics.
일반적으로 필라멘트의 고강력 특성은 방사된 미연신사를 연신할때 연신배율을 높여줌으로써 얻어진다는 것은 공지의 사실이다. 그러나 연신배열을 높일 경우에는 공정성이 극히 나빠져 실용성이 없어지게 된다.It is generally known that the high strength properties of filaments are obtained by increasing the draw ratio when drawing spun undrawn yarn. However, when the stretched array is increased, the fairness is extremely bad and practicality is lost.
따라서 고강력 특성을 갖는 필라멘트를 제조하기 위해서는 원료인 중합체의 중합도를 IV(고유점도) 0.7이상으로 높여주고, 또한 연신배율을 높여주기 위해 방사속도를 낮게 하는 것이 종래 방법이었으나, 만족할 만한 수준은 되지 못하였고, 최근 2단 연신방법이 응용되어 실용화되고 있는 단계에 있으나 이 역시 고강력 특성을 얻기 위해 고중합도의 중합체를 사용하며 연신배율을 높이기 위해 1,000m/분 이하의 낮은 방사속도로 미연신사를 제조하고 있다.Therefore, in order to manufacture a filament having high strength characteristics, the conventional method of increasing the polymerization degree of the polymer as a raw material to IV (intrinsic viscosity) of 0.7 or more and lowering the spinning speed in order to increase the draw ratio was not satisfactory. Recently, the two-stage drawing method has been applied and is being put into practical use. However, this method also uses high-polymerization polymer to obtain high strength properties and uses undrawn yarn at low spinning speed of 1,000m / min or less to increase the draw ratio. Manufacture.
본 발명은 이러한 문제점을 해결하기 위한 것으로 중합도를 높이지 않은 일반 의류용 정도의 중합체를 사용하고, 방사속도도 특별히 낮춤이 없이 연신공정에 의해서 고강력, 저수축 특성을 갖는 산업자재용 필라멘트 섬유의 제조방법을 제공하려는 데 그 목적이 있는 것이다.The present invention is to solve this problem is to use a polymer of general degree of clothing that does not increase the degree of polymerization, the spinning material of the industrial material filament fiber having a high strength, low shrinkage characteristics by the stretching process without particularly lowering the spinning speed The purpose is to provide a manufacturing method.
본 발명에서 사용되는 폴리머는 폴리에스터로 결정성 폴리머이다.The polymer used in the present invention is a crystalline polymer as polyester.
이는 방사 및 연신에 의해 폴리머가 배향이 되고 결정화되어 섬유로서 갖춰야 할 물리적 특성을 갖게 된다. 여기서 배향도(특히 비결정영역의 배향도)와 결정화도는 다음의 열처리 방법에 따라 달라지게 되고, 또 섬유의 물리적 특성에도 크게 영향을 준다.This results in the physical properties that the polymer is oriented and crystallized by spinning and stretching to possess as fibers. Here, the degree of orientation (particularly the degree of orientation of the amorphous region) and the degree of crystallinity depend on the following heat treatment method, and also greatly affect the physical properties of the fiber.
본 발명자는 폴리에스터 폴리머의 이러한 특성에 착안하여 폴리머의 중합도를 증가시키거나 방사속도의 하향조정이 없이 연신공정에 의해 고강력, 저수축 특성을 갖는 산업자재용 필라멘트를 제조하는 방법을 발명하게 되었다.The inventors have devised a method of manufacturing a filament for industrial materials having high strength and low shrinkage characteristics by a stretching process without increasing the degree of polymerization of the polymer or adjusting the spinning speed without focusing on these characteristics of the polyester polymer. .
본 발명자는 폴리에스터 필라멘트의 가열온도에 따른 연신성과 물성을 조사하는 과정에서 연신온도가 높아짐에 따라 연신이 용이해져 연신배율을 높일 수 있음을 발견하였다.The present inventors have found that as the stretching temperature increases in the process of investigating the stretching properties and physical properties of the polyester filament according to the heating temperature, the stretching can be easily increased to increase the draw ratio.
그러나 연신시 공급사인 미연신사는 결정화도 5% 미만으로 열에 대한 안정성이 부족하여 100℃ 이상으로 연신온도를 높일 경우에는 공정상 문제가 발생하게 되므로 연신온도와 연신배율에 한계가 있어 통상의 연신시스템에서는 6.0g/d/ 이상의 강도를 얻기가 어렵다.However, the unstretched supplier, which is a supplier at the time of drawing, has a crystallization degree of less than 5% and lacks stability to heat, and thus, if the drawing temperature is increased to 100 ° C. or higher, a problem occurs in the drawing process. It is difficult to obtain strengths of 6.0 g / d / or more.
그러나 본 발명에서는 상기의 열적 안정성이 부족한 미연신 공급사를 연신온도 80~100℃에서 공급사의 자연연신비 0.9~1.3배의 연신배율에서 일차 연신을 하고 연신된 사조를 연속하여 연신온도 180~210℃에서 이차적으로 재연신할때 접촉식의 가열판을 사용하여 연신배율을 최대화함으로 일반 의류용 중합도의 폴리머(IV=0.63)를 사용하여 강도 8.0g/d까지 공정상의 문제가 없이 고강도의 산업자재용 필라멘트를 얻을 수 있었고, 이렇게 하여 얻어진 고강력 필라멘트 사조를 연속적으로 1~4%의 긴장이 될 수 있도록 경사진 로울러에서 180~210℃의 온도에서 열처리를 해줌으로 0.5g/d정도 강도의 향상과 함께 열수수축율이 8~10%에서 3%까지 낮아진 저수축 특성을 갖는 산업자재용 필라멘트를 얻었다.However, in the present invention, the unstretched supplier lacking the thermal stability is drawn at a draw ratio of the draw ratio of 0.9 to 1.3 times at the draw temperature of 80 to 100 ° C, and the drawn yarns are continuously drawn at the draw temperature of 180 to 210 ° C. When re-stretching secondly, the contact ratio heating plate is used to maximize the draw ratio, so the polymer material of general degree of polymerization (IV = 0.63) is used to produce high-strength industrial filaments without any process problems up to 8.0g / d. The high-strength filament yarn obtained in this way was heat treated at a temperature of 180 to 210 ° C. in an inclined roller so that the tension of the high-strength filament yarn can be continuously adjusted to 1 to 4%. An industrial material filament having a low shrinkage property having a shrinkage ratio lowered from 8 to 10% to 3% was obtained.
이와 같은 본 발명을 실시예와 비교예에 의거 상세히 설명하면 다음과 같다. 단, 본 발명이 실시예로 국한되는 것은 아니다.The present invention will be described in detail based on Examples and Comparative Examples. However, the present invention is not limited to the examples.
[실시예 1~5, 비교예 1~4][Examples 1-5, Comparative Examples 1-4]
교유점도(IV) 0.63의 폴리에스터를 방사속도 1,500m/분에서 방사하여 얻어진 미연신사는 데니어가 446, 배향도(Δn)가 830×10-5절단신도가 420%였다. 이를 연신하여 표 1과 같은 결과를 얻었다.The undrawn yarn obtained by spinning a polyester having a cross point viscosity (IV) of 0.63 at a spinning speed of 1,500 m / min had a denier of 446 and an orientation degree (Δn) of 830 × 10 -5 with a cut elongation of 420%. This was stretched to obtain the results shown in Table 1.
[표 1]TABLE 1
◎ : 우수함, ○ : 보통, × : 불량◎: Excellent, ○: Normal, ×: Poor
표 1에서 나타난 바와 같이 비교예 1~3의 통상의 일단 연신에서는 연신배율을 높여 강도 6.0g/d 이상의 필라멘트사를 공정상 문제점(단사)이 없이 생산한 것이 어렵다. 그러나 실시예 1~5에서 볼수 있듯이 공급 미연신사를 자연연신비(NDR)가 0.9~1.3배의 범위에서 일차연신하고, 연속적으로 200℃ 또는 210℃의 접촉식 가열판에서 이차연신을 함으로써 안정적으로 고배율연신이 가능하고 따라서 고강도의 피라멘트사가 고유점도(IV) 0.63의 폴리머를 사용하여 얻어짐을 알 수 있다.As shown in Table 1, it is difficult to produce a filament yarn having a strength of 6.0 g / d or more without a problem (single yarn) by increasing the draw ratio in the usual single stretching of Comparative Examples 1 to 3. However, as can be seen in Examples 1 to 5, the unstretched feed is stably drawn in the range of 0.9-1.3 times the natural draw ratio (NDR) and continuously drawn in the contact heating plate at 200 ° C. or 210 ° C. for high stability. It is understood that this is possible and thus high-strength filament yarn is obtained using a polymer having an intrinsic viscosity (IV) 0.63.
[실시예 6~9, 비교예 5~7][Examples 6-9, Comparative Examples 5-7]
고유점도(IV) 0.63의 폴리에스터를 방사속도 2000m/분에서 방사하여 얻어진 데니어가 363, 배향도(Δn)43×10-3, 절단신도 330%의 미연신사를 연신하여 표 2와 같은 결과를 얻었다.The non-drawn yarn of 363, orientation degree (Δn) 43 × 10 -3 , and cutting elongation of 330% was obtained by spinning a polyester having an intrinsic viscosity (IV) of 0.63 at a spinning speed of 2000 m / min. .
[표 2]TABLE 2
◎ : 우수함, ○ : 보통, × : 불량◎: Excellent, ○: Normal, ×: Poor
표 2에서는 본 발명의 표 1과 같은 제법으로 만들어지는 고강력 필라멘트를 연속적으로 경사진 로울러에서 긴장열처리함에 따른 연신사의 물리적 특성변화를 보여주고 있다.Table 2 shows the physical properties of the stretched yarns due to the tension heat treatment of the high-strength filament made by the manufacturing method as shown in Table 1 of the present invention in a continuously inclined roller.
비교예 7과 실시예 6에서도 표 1에서와 같이 연신온도를 180℃로 함으로써 안정적으로 높은 연신배율과 고강력을 얻을 수 있음을 알 수 있고, 실시예 8, 9에서는 연신사를 3%의 긴장하에서 180℃, 200℃에서 열처리함으로 열수수축율이 각각 4%, 3%의 저수축특성을 나타냄을 알 수 있다.In Comparative Example 7 and Example 6, as shown in Table 1, it is possible to stably obtain a high draw ratio and high strength by setting the stretching temperature to 180 ° C. In Examples 8 and 9, the stretched yarn was 3% in tension. Heat treatment at 180 ° C. and 200 ° C. below shows that the thermal shrinkage was 4% and 3%, respectively.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910017358A KR930010806B1 (en) | 1991-10-04 | 1991-10-04 | Process for the preparation of filament having high strength and low shrinkage for industrial material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910017358A KR930010806B1 (en) | 1991-10-04 | 1991-10-04 | Process for the preparation of filament having high strength and low shrinkage for industrial material |
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| Publication Number | Publication Date |
|---|---|
| KR930008212A KR930008212A (en) | 1993-05-21 |
| KR930010806B1 true KR930010806B1 (en) | 1993-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019910017358A KR930010806B1 (en) | 1991-10-04 | 1991-10-04 | Process for the preparation of filament having high strength and low shrinkage for industrial material |
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| Country | Link |
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| KR (1) | KR930010806B1 (en) |
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- 1991-10-04 KR KR1019910017358A patent/KR930010806B1/en not_active IP Right Cessation
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| KR930008212A (en) | 1993-05-21 |
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