KR960029072A - Manufacturing method of biaxially oriented polyester film - Google Patents

Manufacturing method of biaxially oriented polyester film Download PDF

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Publication number
KR960029072A
KR960029072A KR1019950001136A KR19950001136A KR960029072A KR 960029072 A KR960029072 A KR 960029072A KR 1019950001136 A KR1019950001136 A KR 1019950001136A KR 19950001136 A KR19950001136 A KR 19950001136A KR 960029072 A KR960029072 A KR 960029072A
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KR
South Korea
Prior art keywords
stretching
stage
longitudinal
polyester film
temperature
Prior art date
Application number
KR1019950001136A
Other languages
Korean (ko)
Other versions
KR0173728B1 (en
Inventor
서정욱
심완섭
이영진
Original Assignee
안시환
주식회사 에스케이씨
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 안시환, 주식회사 에스케이씨 filed Critical 안시환
Priority to KR1019950001136A priority Critical patent/KR0173728B1/en
Publication of KR960029072A publication Critical patent/KR960029072A/en
Application granted granted Critical
Publication of KR0173728B1 publication Critical patent/KR0173728B1/en

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Classifications

    • 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
    • B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
    • B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0053—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets

Abstract

본 발명은 두께균일성 및 표면평활성이 우수한 이축 배향 폴리에스테르 필름을 제조하는 방법에 관한 것으로서, 구체적으로 폴리에스테르 수지를 용융 압출하고 미연신 쉬트를 종방향 및 횡방향으로 연신하는 단계를 포함하는 이축 배향 폴리에스테르필름의 제조방법에 있어서, 상기 연신 단계가, 총 종연신비가 3.5배 이상이 되도록 3단 종연신을 행하되, 제1단 및 제2단 종연신쉬트의 결정화에너지가 각각 20J/g 이상 및 15J/g 이상이 되도록 제1단 및 제2단 종연신을 행하고, 쉬트의 유리전이온도 (Tg)+50℃ 내지 140℃의 온도 범위에서 1.5 내지 2.5배의 연신비로 제3단 종연신을 행한 후, 그 온도로부터 105℃ 이상의 차이만큼 급속 냉각시킨 다음, 3.5 내지 4.5배로 횡연신하는 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, the stretching step is performed in three stages of longitudinal stretching so that the total longitudinal stretching ratio is 3.5 times or more, and the crystallization energy of the first stage and the second stage longitudinal stretching sheets is 20 J / g or more, respectively. And longitudinal stretching of the first and second stages to be 15 J / g or more, and the third stage longitudinal stretching at a stretch ratio of 1.5 to 2.5 times in the glass transition temperature (T g ) + 50 ° C. to 140 ° C. of the sheet. After the cooling, the film is rapidly cooled by a difference of 105 ° C. or more from the temperature, and then transversely stretched 3.5 to 4.5 times.

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.

제1도 및 제2도는 각각 본 발명의 한 태양에 따르는 폴리에스테르 필름의 3단 종연신 장치의 개략도이다.1 and 2 are schematic diagrams of a three-stage longitudinal drawing apparatus of a polyester film, respectively, according to one aspect of the present invention.

Claims (2)

폴리에스테르 수지를 용융 압출하고 미연신 쉬트를 종방향 및 횡방향으로 연신하는 단계를 포함하는 이축배향 폴리에스테르필름의 제조방법에 있어서, 상기 연신 단계가, 총 종연신비가 3.5배 이상이 되도록 3단 종연신을 행하되, 제1단 및 제2단 종연신쉬트의 결정화에너지가 각각 20J/g 이상 및 15J/g 이상이 되도록 제1단 및 제2단 종연신을 행하고, 다음 식(1)의 온도에서 1.5 내지 2.5배의 연신비로 제3단 종연신을 행한 후, 다음식(2)의 냉각온도까지 급속 냉각시킨 다음 3.5 내지 4.5배의 연신비로 횡연신하는 것을 특징으로 하는 이축배향 폴리에스테르 필름의 제조방법:In the method for producing a biaxially oriented polyester film comprising melt extruding a polyester resin and stretching the unstretched sheet in the longitudinal and transverse directions, the stretching step is performed in three stages so that the total longitudinal stretch ratio is 3.5 times or more. The longitudinal stretching is carried out, but the first stage and the second stage longitudinal stretching are performed so that the crystallization energy of the first stage and the second stage longitudinal stretching sheet is 20 J / g or more and 15 J / g or more, respectively, and the temperature of the following formula (1) After the third stage longitudinal stretching at a stretching ratio of 1.5 to 2.5 times at, the rapid cooling to the cooling temperature of the following formula (2) and then transverse stretching at a stretching ratio of 3.5 to 4.5 times of the biaxially oriented polyester film Manufacturing Method: Tg+50℃≤제3단 종연신온도≤140℃ (1)T g + 50 ℃ ≤3rd stage longitudinal drawing temperature≤140 ℃ (1) 냉각온도≤제3단 종연신온도-105℃ (2)Cooling temperature≤3rd 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 제1단 및 제2단 종연신쉬트의 비중이 각각 1.345 이하 및 1.355 이하가 되도록 하는 것을 특징으로 하는 제조방법.The method according to claim 1, wherein the specific gravity of the first and second longitudinal drawing sheets is 1.345 or less and 1.355 or less, respectively. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950001136A 1995-01-24 1995-01-24 Manufacturing method of biaxially oriented polyester film KR0173728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950001136A KR0173728B1 (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
KR1019950001136A KR0173728B1 (en) 1995-01-24 1995-01-24 Manufacturing method of biaxially oriented polyester film

Publications (2)

Publication Number Publication Date
KR960029072A true KR960029072A (en) 1996-08-17
KR0173728B1 KR0173728B1 (en) 1999-04-01

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Application Number Title Priority Date Filing Date
KR1019950001136A KR0173728B1 (en) 1995-01-24 1995-01-24 Manufacturing method of biaxially oriented polyester film

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KR (1) KR0173728B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100369442B1 (en) * 1998-11-20 2003-03-28 에스케이씨 주식회사 Manufacturing method of biaxially oriented polyester film

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KR0173728B1 (en) 1999-04-01

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