KR960021480A - Manufacturing method of biaxially oriented polyester film - Google Patents

Manufacturing method of biaxially oriented polyester film Download PDF

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Publication number
KR960021480A
KR960021480A KR1019940034949A KR19940034949A KR960021480A KR 960021480 A KR960021480 A KR 960021480A KR 1019940034949 A KR1019940034949 A KR 1019940034949A KR 19940034949 A KR19940034949 A KR 19940034949A KR 960021480 A KR960021480 A KR 960021480A
Authority
KR
South Korea
Prior art keywords
stretching
stage
longitudinal
biaxially oriented
oriented polyester
Prior art date
Application number
KR1019940034949A
Other languages
Korean (ko)
Other versions
KR0140299B1 (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.)
Filing date
Publication date
Application filed by 안시환, 주식회사 에스케이씨 filed Critical 안시환
Priority to KR1019940034949A priority Critical patent/KR0140299B1/en
Publication of KR960021480A publication Critical patent/KR960021480A/en
Application granted granted Critical
Publication of KR0140299B1 publication Critical patent/KR0140299B1/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
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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

Abstract

본 발명은 두께균일성이 우수한 이축 배향 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 종연신비 3.5배 이상의 3단 종연신을 행하되, 제1단 및 제2단 종연신 쉬트의 결정화에너지가 각각 20J/g 이상 및 15J/g 이상이 되도록 제1단 및 제2단 종연신을 행하고, 연신온도 110 내지 140℃ 범위에서 연신비 1.5 내지 2.5배 범위로 제3단 종연신을 행하는 것을 특징으로 한다.The present invention relates to a method for producing a biaxially oriented polyester film having excellent thickness uniformity, specifically, a biaxially oriented polyester comprising melt extruding a polyester resin and stretching the unstretched sheet in the longitudinal and transverse directions. In the method for producing a film, in the longitudinal drawing step, a three-stage longitudinal drawing of 3.5 times or more of the total longitudinal drawing ratio is performed, wherein the crystallization energy of the first and second stage longitudinal drawing sheets is 20 J / g or more and 15 J / g or more, respectively. The first stage and the second stage longitudinal stretching is performed so as to achieve the third stage longitudinal stretching in the stretching ratio of 1.5 to 2.5 times in the stretching temperature range of 110 to 140 ° C.

Description

이축 배향 폴리에스테르 필름의 제조방법Manufacturing method of biaxially oriented polyester film

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not 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 이축 배향 폴리에스테르 필름의 제조방법에 있어서, 상기 종방향 연신 단계에서 총 종연신비 3.5배 이상의 3단 종연신을 행하되, 제1단 및 제2단 종연신 쉬트의 결정화에너지가 각각 20J/g 이상 및 15J/g 이상이 되도록 제1단 및 제2단 종연신을 행하고, 연신온도 110 내지 140℃ 범위에서 연신비 1.5 내지 2.5배로 제3단 종연신을 행하는 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 unstretched sheet in a longitudinal direction and a transverse direction, wherein the longitudinal stretching step is performed in three stages of longitudinal stretching of 3.5 times or more. The first stage and the second stage longitudinal stretching are carried out 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 stretching ratio is in the stretching temperature range of 110 to 140 ° C. The third stage longitudinal stretching is carried out at 1.5 to 2.5 times, characterized in that the biaxially oriented polyester film production method. 제1항에 있어서, 상기 제1단 및 제2단 종연신 쉬트의 비중이 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 end longitudinally stretched sheets is 1.345 or less and 1.355 or less. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940034949A 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film KR0140299B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940034949A KR0140299B1 (en) 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940034949A KR0140299B1 (en) 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film

Publications (2)

Publication Number Publication Date
KR960021480A true KR960021480A (en) 1996-07-18
KR0140299B1 KR0140299B1 (en) 1998-07-01

Family

ID=19402099

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940034949A KR0140299B1 (en) 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film

Country Status (1)

Country Link
KR (1) KR0140299B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100258571B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity
KR100258570B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity
KR100258568B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100369441B1 (en) * 1998-11-20 2003-03-17 에스케이씨 주식회사 Manufacturing method of biaxially oriented polyester film

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100258571B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity
KR100258570B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity
KR100258568B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity

Also Published As

Publication number Publication date
KR0140299B1 (en) 1998-07-01

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