WO2017131373A1 - Method for manufacturing polyester film by using simultaneous biaxial stretching method - Google Patents

Method for manufacturing polyester film by using simultaneous biaxial stretching method Download PDF

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WO2017131373A1
WO2017131373A1 PCT/KR2017/000470 KR2017000470W WO2017131373A1 WO 2017131373 A1 WO2017131373 A1 WO 2017131373A1 KR 2017000470 W KR2017000470 W KR 2017000470W WO 2017131373 A1 WO2017131373 A1 WO 2017131373A1
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stretching
polyester film
section
heat treatment
simultaneous biaxial
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PCT/KR2017/000470
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French (fr)
Korean (ko)
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김태곤
전용현
원종선
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(주)효성
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets

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  • the polyester film manufacturing method using a simultaneous stretching process provides a polyester film manufacturing method that can reduce the boeing rate by optimizing the temperature of the stretching section and the heat treatment section in the tenter, the draw ratio and relaxation rate of the stretching process.
  • polyester film has excellent mechanical properties, dimensional stability, chemical resistance and transparency, and is widely used in various fields such as magnetic recording media, capacitors, electrical insulating materials, packaging, etc. have.
  • the polyester film is drawn by a sequential drawing method and a simultaneous drawing method.
  • both ends of the film are held by the clip in the transverse drawing machine.
  • the deformation of the film end is constrained to the transverse residual stress generated during the lateral stretching and the shrinkage stress caused during heat setting, whereas the center portion of the film is less affected by the clip due to the less influence of the clip. Therefore, the bowing phenomenon of the film caused by the difference in the restraint force between the both ends and the center part in the transverse stretching machine in the direction opposite to the direction in which the film travels is accompanied by the process of biaxial stretching and heat setting. Although it is an unavoidable problem in the process, it is extremely difficult to equalize the widthwise physical properties of the film due to the bowing of the film.
  • the present invention is to solve the above problems, but to prepare a polyester film using a simultaneous drawing process, by optimizing the temperature of the stretching section and heat treatment section in the tenter, the draw ratio of the stretching process and the relaxation rate of the polyester film boeing It relates to a polyester production method that can lower the rate.
  • the present invention in the polyester film manufacturing method using the simultaneous biaxial stretching method, the longitudinal and transverse bi-directional stretching ratio is 3.5-4.0 times, the relaxation rate is 5-10%, the stretching period in the tenter It provides a polyester film production method using a simultaneous biaxial stretching method, characterized in that the temperature range of 80-110 °C, heat treatment section temperature range of 190-240 °C.
  • the temperature range of the stretching section in the tenter is 80-100 ° C for reducing the boeing rate.
  • the temperature range of the heat treatment section in the tenter is more preferably 190-220 ° C. to reduce the boeing rate.
  • the longitudinal and lateral bidirectional draw ratio it is more preferable for the longitudinal and lateral bidirectional draw ratio to be 4.0 times for reducing the boeing rate.
  • the relaxation rate it is more preferable to set the relaxation rate to 10% for reducing the boeing rate.
  • the polyester film produced by the manufacturing method is characterized in that the bowing rate is 5% or less.
  • the temperature of the stretching section and the heat treatment section in the tenter, the stretching ratio and the relaxation rate of the stretching process are optimized as described above, thereby suppressing the bowing phenomenon to provide a method for producing a biaxially stretched polyester film having uniform widthwise physical properties.
  • 1 illustrates a method of measuring a bowing rate.
  • FIG. 2 illustrates subdivided sections of preheating section, drawing section, heat treatment section, cooling section, drawing section and heat treatment section in the tenter.
  • the present invention relates to a polyester film manufacturing method using a simultaneous stretching process, by adjusting the temperature in the stretching section and the heat treatment section in the tenter, the draw ratio and the relaxation rate of the stretching process, to minimize the bowing rate.
  • the polyester film manufacturing method by the co-drawing process is as follows. First, after the preheating step, longitudinal stretching and transverse stretching are simultaneously performed in the stretching section. After the shrinkage stress is removed through the heat treatment section, the polyester film is produced through the cooling section.
  • the process temperature, the draw ratio and the relaxation rate was adjusted as follows to minimize the elongation.
  • the tenter in which the simultaneous stretching process is largely composed of a preheating section 100, a drawing section 200, a heat treatment section 300, and a cooling section 400.
  • the drawing section is subdivided into drawing section 1 (1), drawing section 2 (2), drawing section 3 (3), and the drawing section consists of section 1 (4), section 2 (5), section 3 (6). ),
  • the heat treatment is divided into four sections (7).
  • the temperature in the stretching section is adjusted for each of the above detailed zones in the temperature range of 80-110 °C. It is not suitable for stretching beyond the above range.
  • the temperature in the heat treatment section is subdivided and adjusted for each subregion in the temperature range of 190 °C -240 °C to measure the boeing rate. If the temperature is lower than 190 ° C, the removal of residual stress is not sufficient. If the temperature is higher than 240 ° C, process problems such as film breaking due to overheating occur.
  • the boeing rate is measured by adjusting the longitudinal and lateral bidirectional draw ratios within 3.0-4.0 times and the relaxation rate within the range of 5-10%.
  • the longitudinal and lateral bidirectional draw ratio is 3.5-4.0 times, the relaxation rate is 5-10%, the temperature range of the stretching section in the tenter is 80-110 °C, and the temperature range of the heat treatment section is 190-240 °C. It provides a polyester film production method using a simultaneous biaxial stretching method characterized in that.
  • the polyester film produced by the polyester film production method using the simultaneous biaxial stretching method is characterized in that the bowing rate is less than 5%.
  • Co-extruded 3-layer (1: 8: 1) intrinsic viscosity 0.62dl / g polyester resin in a twin screw type extruder at 265-285 °C under T-die 285 °C, Stretching temperature 90-110 degreeC, heat processing temperature 190-240 degreeC, MDTD 3.5 extending
  • the film produced as described above was measured in a boeing rate with a grid pattern, and the results are shown in Table 1.
  • the bowing rate is the distance (mm) from the reference straight line to the peak of the bow for the shape where the straight line drawn transversely on the surface of the film exits the transverse drawer using the ink line at the entrance of the transverse drawer.
  • film width mm
  • Example 2 As in the conditions shown in Table 1 was carried out in the same manner as in Example 2 except that the temperature of the heat treatment section was lowered by 20 °C.
  • the temperature of the heat treatment section was increased by 20 ° C., and the draw ratio was increased to 4 times.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Provided is a method for manufacturing a polyester film by using a simultaneous biaxial stretching method, such that longitudinal and transverse draw ratios are 3.5-4.0 times, the relaxation rate is 5-10%, the temperature range of a stretching zone within a tenter is 80-110°C and the temperature range of a heat treatment zone is 190-240°C. The manufacturing method can provide a biaxially stretching polyester film having uniform transverse physical properties since a bowing phenomenon is inhibited by optimizing the temperature of a stretching zone within a tenter and a heat treatment zone in a simultaneous stretching process, and the draw ratio and relaxation rate of a stretching process.

Description

동시이축연신방법을 이용한 폴리에스테르 필름 제조방법Method for producing polyester film using coaxial stretching method
동시 연신공정을 이용한 폴리에스테르 필름 제조방법에 있어서, 텐터 내 연신구간 및 열처리 구간의 온도, 연신공정의 연신비 및 이완율을 최적화하여 보잉율을 감소시킬 수 있는 폴리에스테르 필름 제조방법을 제공한다.In the polyester film manufacturing method using a simultaneous stretching process, it provides a polyester film manufacturing method that can reduce the boeing rate by optimizing the temperature of the stretching section and the heat treatment section in the tenter, the draw ratio and relaxation rate of the stretching process.
일반적으로 폴리에스테르 필름은 우수한 기계적 성질, 치수안정성, 내화학성및 투명성이 우수하여 자기기록 매체, 콘덴서, 전기절연 재료, 포장용 등의 분야뿐만 아니라, 최근에는 디스플레이 분야의 광학용도 등 다양한 분야에서 널리 사용되고 있다.In general, polyester film has excellent mechanical properties, dimensional stability, chemical resistance and transparency, and is widely used in various fields such as magnetic recording media, capacitors, electrical insulating materials, packaging, etc. have.
상기 폴리에스테르 필름을 연신하는 방법에는 축차연신법과 동시연신법이 있는데, 축차연신법을 이용하는 경우, 횡연신기 내에서 필름의 양쪽 단부를 클립이 잡고 있는 바, 종방향 연신시 발생된 종방향 잔류응력과 횡방향 연신시 발생되는 횡방향 잔류응력, 열고정시 야기되는 수축 응력에 대해서 필름 단부는 그 변형이 구속되는 반면, 필름의 중앙부는 클립의 영향이 적어 변형에 대한 구속력이 상대적으로 약하다. 따라서, 횡연신기 내에서 양쪽 단부와 중앙부 사이의 구속력의 차이로 중앙부가 필름의 진행 방향의 반대 방향으로 밀려서 발생하는 필름의 활모양 휘어짐(bowing) 현상은 이축연신과 열고정의 과정에서 수반되는 필름 제조 공정상 피할 수 없는 문제인데, 이러한 필름의 보잉 현상으로 필름의 폭방향 물성의 균일화가 극히 곤란하였다.The polyester film is drawn by a sequential drawing method and a simultaneous drawing method. In the case of using the sequential drawing method, both ends of the film are held by the clip in the transverse drawing machine. The deformation of the film end is constrained to the transverse residual stress generated during the lateral stretching and the shrinkage stress caused during heat setting, whereas the center portion of the film is less affected by the clip due to the less influence of the clip. Therefore, the bowing phenomenon of the film caused by the difference in the restraint force between the both ends and the center part in the transverse stretching machine in the direction opposite to the direction in which the film travels is accompanied by the process of biaxial stretching and heat setting. Although it is an unavoidable problem in the process, it is extremely difficult to equalize the widthwise physical properties of the film due to the bowing of the film.
본 발명은 상기의 문제점을 해결하기 위한 것으로, 동시 연신공정을 이용하여 폴리에스테르 필름을 제조하되, 텐터 내 연신구간 및 열처리 구간의 온도, 연신공정의 연신비 및 이완율을 최적화하여 폴리에스테르 필름의 보잉율을 낮출 수 있는 폴리에스테르 제조방법에 관한 것이다.The present invention is to solve the above problems, but to prepare a polyester film using a simultaneous drawing process, by optimizing the temperature of the stretching section and heat treatment section in the tenter, the draw ratio of the stretching process and the relaxation rate of the polyester film boeing It relates to a polyester production method that can lower the rate.
상기 목적을 달성하기 위하여 본 발명은, 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법에 있어서, 종, 횡 양방향 연신비를 3.5-4.0배, 이완율을 5-10%로 하고, 텐터 내 연신구간의 온도 범위를 80-110℃, 열처리구간 온도범위를 190-240℃로 조절하는 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법을 제공한다.In order to achieve the above object, the present invention, in the polyester film manufacturing method using the simultaneous biaxial stretching method, the longitudinal and transverse bi-directional stretching ratio is 3.5-4.0 times, the relaxation rate is 5-10%, the stretching period in the tenter It provides a polyester film production method using a simultaneous biaxial stretching method, characterized in that the temperature range of 80-110 ℃, heat treatment section temperature range of 190-240 ℃.
상기 제조방법에 있어서 텐터 내 연신구간의 온도 범위를 80-100℃로 하는 것이 보잉율 감소를 위해 더욱 바람직하다.In the above production method, it is more preferable that the temperature range of the stretching section in the tenter is 80-100 ° C for reducing the boeing rate.
상기 제조방법에 있어서 텐터 내 열처리구간 온도범위를 190-220℃로 하는 것이 보잉율 감소를 위해 더욱 바람직하다.In the above production method, the temperature range of the heat treatment section in the tenter is more preferably 190-220 ° C. to reduce the boeing rate.
상기 제조방법에 있어서 종, 횡 양방향 연신비가 4.0배로 하는 것이 보잉율 감소를 위해 더욱 바람직하다.In the above production method, it is more preferable for the longitudinal and lateral bidirectional draw ratio to be 4.0 times for reducing the boeing rate.
상기 제조방법에 있어서 이완율을 10%로 하는 것이 보잉율 감소를 위해 더욱 바람직하다.In the above manufacturing method, it is more preferable to set the relaxation rate to 10% for reducing the boeing rate.
상기 제조방법에 의해 제조된 폴리에스테르 필름은 보잉율이 5%이하인 것을 특징으로 한다.The polyester film produced by the manufacturing method is characterized in that the bowing rate is 5% or less.
동시 연신공정에서 텐터 내 연신구간 및 열처리 구간의 온도, 연신공정의 연신비 및 이완율을 상기와 같이 최적화하여, 보잉현상을 억제하여 폭방향 물성이 균일한 이축 연신 폴리에스테르 필름의 제조방법을 제공하는 것이다.In the simultaneous stretching process, the temperature of the stretching section and the heat treatment section in the tenter, the stretching ratio and the relaxation rate of the stretching process are optimized as described above, thereby suppressing the bowing phenomenon to provide a method for producing a biaxially stretched polyester film having uniform widthwise physical properties. will be.
도 1은 보잉율을 측정하는 방법을 설명한다. 1 illustrates a method of measuring a bowing rate.
도 2는 텐터 내의 예열구간, 연신구간, 열처리구간, 냉각구간과, 연신구간 및 열처리 구간의 세분화된 구역을 설명한다.FIG. 2 illustrates subdivided sections of preheating section, drawing section, heat treatment section, cooling section, drawing section and heat treatment section in the tenter.
본 발명은 동시 연신공정을 이용한 폴리에스테르 필름 제조방법에 있어서, 텐터 내 연신구간 및 열처리 구간의 온도, 연신공정의 연신비 및 이완율을 조절하여, 보잉율을 최소화할 수 있는 조건에 관한 것이다.The present invention relates to a polyester film manufacturing method using a simultaneous stretching process, by adjusting the temperature in the stretching section and the heat treatment section in the tenter, the draw ratio and the relaxation rate of the stretching process, to minimize the bowing rate.
동시연신공정에 의한 폴리에스테르 필름 제조방법은 개략적으로 살펴보면 다음과 같다. 먼저 예열단계를 거친 후, 연신구간에서 종연신과 횡연신이 동시에 이루어지게 된다. 다음 열처리구간을 통해 수축응력이 제거된 후 냉각구간을 거쳐 폴리에스테르 필름이 제조되게 된다.The polyester film manufacturing method by the co-drawing process is as follows. First, after the preheating step, longitudinal stretching and transverse stretching are simultaneously performed in the stretching section. After the shrinkage stress is removed through the heat treatment section, the polyester film is produced through the cooling section.
동시 연신공정을 이용한 폴리에스테르 필름의 제조방법에 있어, 연신율을 최소화하기 위하여 아래와 같이 공정 온도, 연신비 및 이완율이 조절되었다.In the manufacturing method of the polyester film using the simultaneous stretching process, the process temperature, the draw ratio and the relaxation rate was adjusted as follows to minimize the elongation.
-온도조절방법-Temperature Control
도2를 참고하면, 동시연신공정이 이루어지는 텐터는 크게 예열구간(100), 연신구간(200), 열처리구간(300), 냉각구간(400)으로 이루어진다. 이중 연신구간은 연신1구간(1), 연신2구간(2), 연신3구간(3)으로 세분화되며, 열처리구간은 열처리1구간(4), 열처리2구간(5), 열처리3구간(6), 열처리4구간(7)으로 세분화된다.Referring to FIG. 2, the tenter in which the simultaneous stretching process is largely composed of a preheating section 100, a drawing section 200, a heat treatment section 300, and a cooling section 400. The drawing section is subdivided into drawing section 1 (1), drawing section 2 (2), drawing section 3 (3), and the drawing section consists of section 1 (4), section 2 (5), section 3 (6). ), The heat treatment is divided into four sections (7).
상기 연신구간에서의 온도는 80-110℃의 온도 범위에서 상기의 각 세부구역 별로 조절된다. 상기 범위를 벗어나면 연신에 적합하지 않다.The temperature in the stretching section is adjusted for each of the above detailed zones in the temperature range of 80-110 ℃. It is not suitable for stretching beyond the above range.
상기 열처리구간에서의 온도는 190℃-240℃의 온도 범위에서 각 세부구역별로 세분화 조절되어 보잉율을 측정한다. 190℃ 보다 낮으면 잔류응력의 제거가 충분하지 못하며, 240℃보다 높으면 과열로 인한 필름 파단 등 공정 문제가 발생한다.The temperature in the heat treatment section is subdivided and adjusted for each subregion in the temperature range of 190 ℃ -240 ℃ to measure the boeing rate. If the temperature is lower than 190 ° C, the removal of residual stress is not sufficient. If the temperature is higher than 240 ° C, process problems such as film breaking due to overheating occur.
-연신비 및 이완율 조절방법-How to adjust the draw ratio and relaxation rate
연신구간에서 종, 횡 양방향 연신비를 3.0-4.0배, 이완율을 5-10%의 범위내에서 조절하여 보잉율을 측정한다.In the drawing section, the boeing rate is measured by adjusting the longitudinal and lateral bidirectional draw ratios within 3.0-4.0 times and the relaxation rate within the range of 5-10%.
상기와 같은 조절을 통해, 종, 횡 양방향 연신비를 3.5-4.0배, 이완율을 5-10%로 하고, 텐터 내 연신구간의 온도 범위를 80-110℃, 열처리구간 온도범위를 190-240℃로 하는 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법을 제공한다.Through the above adjustment, the longitudinal and lateral bidirectional draw ratio is 3.5-4.0 times, the relaxation rate is 5-10%, the temperature range of the stretching section in the tenter is 80-110 ℃, and the temperature range of the heat treatment section is 190-240 ℃. It provides a polyester film production method using a simultaneous biaxial stretching method characterized in that.
또한 상기의 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법으로 제조된 폴리에스테르 필름은 보잉율이 5%미만인 것을 특징으로 한다.In addition, the polyester film produced by the polyester film production method using the simultaneous biaxial stretching method is characterized in that the bowing rate is less than 5%.
실시예Example
실시예1Example 1
고유점도가 0.62dl/g 폴리에스테르 수지를 트윈 스크류타입의 압출기에서 265-285℃ 조건으로 T-다이 285℃에서 3-layer(1:8:1) 공압출하고, 동시연신 방식으로 표1에서 표시한 조건과 같이 연신온도 90-110℃, 열처리온도 190-240℃, MDTD 3.5 연신하여, 이완율 5%로 폴리에스테르 필름(평균두께 100μm)를 제조하였다.Co-extruded 3-layer (1: 8: 1) intrinsic viscosity 0.62dl / g polyester resin in a twin screw type extruder at 265-285 ℃ under T-die 285 ℃, Stretching temperature 90-110 degreeC, heat processing temperature 190-240 degreeC, MDTD 3.5 extending | stretching like the indicated conditions were carried out, and the polyester film (average thickness 100 micrometers) was manufactured by 5% of relaxation rate.
상기와 같이 만들어진 필름을 격자무늬 먹줄로 보잉율 측정하여 그 결과를 표1에 표시하였다.The film produced as described above was measured in a boeing rate with a grid pattern, and the results are shown in Table 1.
보잉율은 횡연신기 입구에서 먹줄을 이용하여 필름의 표면에 횡방향으로 그려진 일직선이 횡연신기를 빠져나온 다음 활모양으로 휘어진 모양에 대해서 기준직선으로부터 활모양의 정점까지의 거리(mm)를 bow height라 하고, 필름의 폭을 film width(mm)라 할 때 다음과 같은 수식에 의해 계산하여 구해졌다. 구체적인 측정 방법은 도1을 통해 나타내었다.The bowing rate is the distance (mm) from the reference straight line to the peak of the bow for the shape where the straight line drawn transversely on the surface of the film exits the transverse drawer using the ink line at the entrance of the transverse drawer. When the width of the film is referred to as film width (mm), it was calculated by the following equation. The specific measuring method is shown through FIG.
보잉율(%)=(bow height/film width)X100Boeing Rate (%) = (bow height / film width) X100
실시예2Example 2
표1에서 표시한 조건과 같이 연신구간 온도를 10℃씩 낮춘 것을 제외하고는 실시예1과 동일한 방법으로 수행하였다.As in the conditions shown in Table 1 was carried out in the same manner as in Example 1 except that the stretching section temperature was lowered by 10 ℃.
실시예3Example 3
표1에서 표시한 조건과 같이 열처리구간 온도를 20℃씩 낮춘 것을 제외하고는 실시예2와 동일한 방법으로 수행하였다.As in the conditions shown in Table 1 was carried out in the same manner as in Example 2 except that the temperature of the heat treatment section was lowered by 20 ℃.
실시예4Example 4
표1에서 표시한 조건과 같이 연신구간 온도를 10℃씩 높인 것을 제외하고는 실시예3과 동일한 방법으로 수행하였다.As in the conditions shown in Table 1 was carried out in the same manner as in Example 3 except that the stretching section temperature was increased by 10 ℃.
실시예5Example 5
표1에서 표시한 조건과 같이 열처리 구간 온도를 20℃씩 높이고, 연신비를 4배로 한것 외에는 실시예4와 동일한 방법으로 수행하였다.As in the conditions shown in Table 1, the temperature of the heat treatment section was increased by 20 ° C., and the draw ratio was increased to 4 times.
실시예6Example 6
표1에서 표시한 조건과 같이 이완율을 10%로 높인것 외에는 실시예5와 동일한 방법으로 수행하였다.As in the conditions shown in Table 1 was carried out in the same manner as in Example 5 except that the relaxation rate was increased to 10%.
실시예7Example 7
표1에서 표시한 조건과 같이 연신구간 온도를 10℃, 열처리구간 온도를 20℃씩 낮춘 것을 제외하고는 실시예6과 동일한 방법으로 수행하였다.As in the conditions shown in Table 1 was carried out in the same manner as in Example 6 except that the stretching section temperature was lowered by 10 ℃, the heat treatment section temperature by 20 ℃.
비교예Comparative example
비교예는 축차연신으로 아래 표1의 조건으로 수행하였다.Comparative Example was carried out under the conditions shown in Table 1 by the sequential stretching.
실시예1 내지 7 및 비교예의 결과를 하기 표1에 표시하였다.The results of Examples 1 to 7 and Comparative Examples are shown in Table 1 below.
구분division 온도조건Temperature condition 연신조건Drawing condition 결과result
ST(연신구간)ST (extension section) HS(열처리구간)HS (heat treatment section) 연신비Elongation ratio 이완율(%)% Relaxation 보잉Boeing
1구간1 section 2구간2 sections 3구간3 sections 1구간1 section 2구간2 sections 3구간3 sections 4구간4 sections MDMD TDTD MDMD TDTD %%
비교예Comparative example 9090 100100 110110 220220 230230 240240 190190 3.53.5 3.53.5 -- 5%5% 8.98.9
실시예1Example 1 9090 100100 110110 220220 230230 240240 190190 3.53.5 3.53.5 5%5% 5%5% 4.94.9
실시예2Example 2 9090 9090 100100 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 4.84.8
실시예3Example 3 상동Same as above 상동Same as above 상동Same as above 200200 210210 220220 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 4.74.7
실시예4Example 4 9090 100100 110110 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 4.54.5
실시예5Example 5 상동Same as above 상동Same as above 상동Same as above 220220 230230 240240 상동Same as above 4.04.0 4.04.0 상동Same as above 상동Same as above 3.93.9
실시예6Example 6 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 4.04.0 4.04.0 10%10% 10%10% 3.63.6
실시예7Example 7 8080 9090 100100 200200 210210 220220 상동Same as above 상동Same as above 상동Same as above 상동Same as above 상동Same as above 3.33.3
실험결과, 연신구간 온도를 80-100℃으로 낮춘 경우, 열처리구간 온도를 190-220℃으로 낮춘경우, 연신비를 4배, 이완율을 10%로 각각 높일수록 보잉율이 감소되는 것을 알 수 있었다.As a result of the experiment, when the drawing section temperature was lowered to 80-100 ° C, when the heat treatment section temperature was lowered to 190-220 ° C, the bowing rate decreased as the draw ratio was increased by 4 times and the relaxation rate was increased to 10%. .
[부호의 설명][Description of the code]
100: 예열구간100: preheating section
200: 연신구간200: extension section
300: 열처리구간300: heat treatment section
400: 냉각구간400: cooling section
1: 연신1구간1: extension 1 section
2: 연신2구간2: extension section
3: 연신3구간3: extension section
4: 열처리1구간4: Heat treatment section 1
5: 열처리2구간5: Heat treatment section 2
6: 열처리3구간6: Heat treatment section 3
7: 열처리4구간7: Heat treatment section 4

Claims (6)

  1. 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법에 있어서, 종, 횡 양방향 연신비를 3.5-4.0배, 이완율을 5-10%로 하고, 텐터 내 연신구간의 온도 범위를 80-110℃, 열처리구간 온도범위를 190-240℃로 하는 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법.In the polyester film production method using the coaxial stretching method, the longitudinal and lateral bidirectional stretching ratio is 3.5-4.0 times, the relaxation rate is 5-10%, the temperature range of the stretching section in the tenter is 80-110 ℃, heat treatment section Polyester film manufacturing method using the simultaneous biaxial stretching method, characterized in that the temperature range of 190-240 ℃.
  2. 제1항에 있어서, 텐터 내 연신구간의 온도 범위를 80-100℃로 하는 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법.The method of manufacturing a polyester film using a simultaneous biaxial stretching method according to claim 1, wherein the temperature range of the stretching section in the tenter is 80-100 ° C.
  3. 제1항 또는 제2항에 있어서, 텐터 내 열처리구간 온도범위를 190-220℃로 하는 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법.The method according to claim 1 or 2, wherein the temperature range of the heat treatment section in the tenter is set to 190 to 220 ° C.
  4. 제1항에 있어서, 종, 횡 양방향 연신비가 4.0배인 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법.The method of manufacturing a polyester film using a simultaneous biaxial stretching method according to claim 1, wherein the longitudinal and transverse bidirectional stretching ratio is 4.0 times.
  5. 제1항 또는 제4항에 있어서, 이완율이 10%인 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법.The method for producing a polyester film using a simultaneous biaxial stretching method according to claim 1 or 4, wherein the relaxation rate is 10%.
  6. 제 1항에 있어서, 상기 폴리에스테르 필름의 보잉율의 5% 이하인 것을 특징으로 하는 동시이축연신방법을 이용한 폴리에스테르 필름 제조방법.The polyester film production method using a simultaneous biaxial stretching method according to claim 1, wherein the polyester film has a bowing ratio of 5% or less.
PCT/KR2017/000470 2016-01-29 2017-01-13 Method for manufacturing polyester film by using simultaneous biaxial stretching method WO2017131373A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920019849A (en) * 1991-04-06 1992-11-20 하기주 Manufacturing method of low shrinkage polyester film
KR950024867A (en) * 1994-02-21 1995-09-15 하기주 Manufacturing method of biaxially stretched polyester base film for spankle
JPH11138629A (en) * 1997-11-05 1999-05-25 Toray Ind Inc Co-biaxially stretched polyester film and manufacturing thereof
KR20060080677A (en) * 2005-01-06 2006-07-11 에스케이씨 주식회사 Biaxially oriented polyester film and preparation thereof
KR20140116864A (en) * 2012-01-24 2014-10-06 도레이 카부시키가이샤 Polyester film and manufacturing process therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920019849A (en) * 1991-04-06 1992-11-20 하기주 Manufacturing method of low shrinkage polyester film
KR950024867A (en) * 1994-02-21 1995-09-15 하기주 Manufacturing method of biaxially stretched polyester base film for spankle
JPH11138629A (en) * 1997-11-05 1999-05-25 Toray Ind Inc Co-biaxially stretched polyester film and manufacturing thereof
KR20060080677A (en) * 2005-01-06 2006-07-11 에스케이씨 주식회사 Biaxially oriented polyester film and preparation thereof
KR20140116864A (en) * 2012-01-24 2014-10-06 도레이 카부시키가이샤 Polyester film and manufacturing process therefor

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