KR960029073A - Manufacturing method of biaxially oriented polyester film - Google Patents
Manufacturing method of biaxially oriented polyester film Download PDFInfo
- Publication number
- KR960029073A KR960029073A KR1019950001137A KR19950001137A KR960029073A KR 960029073 A KR960029073 A KR 960029073A KR 1019950001137 A KR1019950001137 A KR 1019950001137A KR 19950001137 A KR19950001137 A KR 19950001137A KR 960029073 A KR960029073 A KR 960029073A
- Authority
- KR
- South Korea
- Prior art keywords
- longitudinal
- stretching
- polyester film
- temperature
- sheet
- Prior art date
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- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
본 발명은 두께균일성 및 표면평활성이 우수한 이축배향 폴리에스테르 필름을 제조하는 방법에 관한 것으로서, 구체적으로 폴리에스테르 수지를 용융 압출하고 미연신 쉬트를 종방향 및 횡방향으로 연신하는 단계를 포함하는 이축 배향 폴리에스테르 필름의 제조방법에 있어서, 상기 종방향 연신 단계에서 총 종연신비가 3.5배 이상 및 종연신쉬트의 결정화에너지가 15J/g 이상이 되도록 2단 종연신을 행하되 쉬트의 유리전이온도 (Tg)+50℃ 내지 140℃의 온도 범위에서 제2단 종연신을 행하고, 그 온도로부터 105℃ 이상의 차이만큼 급속 냉각시키는 것을 특징으로 한다.The present invention relates to a method for producing a biaxially oriented polyester film having excellent thickness uniformity and surface smoothness, and specifically, comprising a step of melt extruding a polyester resin and stretching the unstretched sheet in the longitudinal and transverse directions. In the method for producing an oriented polyester film, in the longitudinal drawing step, two-stage longitudinal drawing is performed such that the total longitudinal drawing ratio is 3.5 times or more and the crystallization energy of the longitudinal drawing sheet is 15 J / g or more, but the glass transition temperature (T) of the sheet g ) The second stage longitudinal stretching is performed in a temperature range of + 50 ° C to 140 ° C, and is rapidly cooled by a difference of 105 ° C or more from the temperature.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명의 한 태양에 따르는 폴리에스테르 필름의 2단 종연신 장치의 개략도이다.1 is a schematic view of a two-stage longitudinal drawing apparatus of a polyester film according to one aspect of the present invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950001137A KR0173727B1 (en) | 1995-01-24 | 1995-01-24 | Manufacturing method of biaxially oriented polyester film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950001137A KR0173727B1 (en) | 1995-01-24 | 1995-01-24 | Manufacturing method of biaxially oriented polyester film |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960029073A true KR960029073A (en) | 1996-08-17 |
KR0173727B1 KR0173727B1 (en) | 1999-04-01 |
Family
ID=19407127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950001137A KR0173727B1 (en) | 1995-01-24 | 1995-01-24 | Manufacturing method of biaxially oriented polyester film |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0173727B1 (en) |
-
1995
- 1995-01-24 KR KR1019950001137A patent/KR0173727B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0173727B1 (en) | 1999-04-01 |
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