KR960029073A - Manufacturing method of biaxially oriented polyester film - Google Patents

Manufacturing method of biaxially oriented polyester film Download PDF

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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
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KR
South Korea
Prior art keywords
longitudinal
stretching
polyester film
temperature
sheet
Prior art date
Application number
KR1019950001137A
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Korean (ko)
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KR0173727B1 (en
Inventor
서정욱
심완섭
이영진
Original Assignee
안시환
주식회사 에스케이씨
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Priority to KR1019950001137A priority Critical patent/KR0173727B1/en
Publication of KR960029073A publication Critical patent/KR960029073A/en
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Publication of KR0173727B1 publication Critical patent/KR0173727B1/en

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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

이축 배향 폴리에스테르 필름의 제조방법Manufacturing method of biaxially oriented polyester film

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)

폴리에스테르 수지를 용융 압출하고 미연신 쉬트를 종방향 및 횡방향으로 연신하는 단계를 포함하는 이축배향 폴리에스테르 필름의 제조방법에 있어서, 상기 종방향 연신 단계에서 총 연신비가3.5배 이상이고 종연신쉬트의 결정화에너지가 15J/g 이상이 되도록 2단 종연신을 행하고, 다음 식(1)의 온도에서 제2단 종연신을 행하고, 다음 식(2)의 냉각온도까지 급속 냉각시키는 것을 특징으로 하는 이축 배향 폴리에스테르 필름의 제조방법:A method for producing a biaxially oriented polyester film comprising melt extruding a polyester resin and stretching an unoriented sheet in the longitudinal and transverse directions, wherein the total stretching ratio is 3.5 times or more in the longitudinal stretching step and the longitudinal stretching sheet. Biaxial stretching, so that the crystallization energy of? Is at least 15 J / g, second longitudinal stretching at the temperature of the following formula (1), and rapidly cooled to the cooling temperature of the following formula (2) Process for producing oriented polyester film: Tg+50℃≤제2단 종연신온도≤140℃ (1)T g + 50 ℃ ≤2nd stage longitudinal drawing temperature≤140 ℃ (1) 냉각온도≤제2단 종연신온도-105℃ (2)Cooling temperature≤2nd stage longitudinal drawing temperature-105 ℃ (2) 상기 식에서, Tg는 쉬트의 유리전이온도이다.Where T g is the glass transition temperature of the sheet. 제1항에 있어서, 상기 종연신쉬트의 비중이 각각 1.35 이하가 되도록 하는 것을 특징으로 하는 제조방법.The method according to claim 1, wherein specific gravity of the longitudinally stretched sheets is set to 1.35 or less, respectively. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950001137A 1995-01-24 1995-01-24 Manufacturing method of biaxially oriented polyester film KR0173727B1 (en)

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

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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

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KR (1) KR0173727B1 (en)

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Publication number Publication date
KR0173727B1 (en) 1999-04-01

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