KR960021481A - Manufacturing method of biaxially oriented polyester film - Google Patents

Manufacturing method of biaxially oriented polyester film Download PDF

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Publication number
KR960021481A
KR960021481A KR1019940034950A KR19940034950A KR960021481A KR 960021481 A KR960021481 A KR 960021481A KR 1019940034950 A KR1019940034950 A KR 1019940034950A KR 19940034950 A KR19940034950 A KR 19940034950A KR 960021481 A KR960021481 A KR 960021481A
Authority
KR
South Korea
Prior art keywords
stretching
stage
longitudinal
oriented polyester
polyester film
Prior art date
Application number
KR1019940034950A
Other languages
Korean (ko)
Other versions
KR0140311B1 (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 KR1019940034950A priority Critical patent/KR0140311B1/en
Publication of KR960021481A publication Critical patent/KR960021481A/en
Application granted granted Critical
Publication of KR0140311B1 publication Critical patent/KR0140311B1/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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

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 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 행한 후, 연신비 3.5 내지 4.5배 범위로 횡연신하는 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 drawing step, three-stage longitudinal stretching of 3.5 times or more the total longitudinal stretching ratio is performed, and the crystallization energy of the first and second stage longitudinal stretching sheets is 20 J / g or more and 15 J / g or more, respectively. After performing the first stage and the second stage longitudinal stretching, and performing the third stage longitudinal stretching in the stretching ratio of 1.5 to 2.5 times in the stretching temperature of 110 to 140 ° C., the transverse stretching is performed in the stretching ratio of 3.5 to 4.5 times. .

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 서트를 종방향 및 횡방향으로 연신하는 단계를 포함하는 이축 배향 폴리에스테르 필름의 제조방법에 있어서, 상기 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 1.5내지 2.5배 범위로 제3단 종연신을 행한후, 연신비 3.5 내지 4.5배 범위로 횡연신하는 것을 특징으로 하는 이축 배향 폴리에스테르 필름의 제조방법.In the method for producing a biaxially oriented polyester film comprising the step of melt extrusion of the polyester resin and stretching the unstretched end in the longitudinal and transverse directions, in the stretching step, a three-stage longitudinal stretching of at least 3.5 times the total longitudinal stretch ratio , The first stage and the second stage longitudinal stretching is 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 1.5 to After performing a 3rd stage longitudinal stretch in 2.5 time range, it transversely stretches in the range of draw ratio 3.5-4.5 times, The manufacturing method of the biaxially-oriented polyester film characterized by the above-mentioned. 제1항에 있어서, 상기 제1단 및 제2단 종연신 러트의 비중이 각각 1.345 이하 및 1.355 이하가 되도록 하는 것을 특징으로 하는 제조방법.The manufacturing method according to claim 1, wherein the specific gravity of the first end and the second end longitudinal drawing ruts 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.
KR1019940034950A 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film KR0140311B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940034950A KR0140311B1 (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
KR1019940034950A KR0140311B1 (en) 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film

Publications (2)

Publication Number Publication Date
KR960021481A true KR960021481A (en) 1996-07-18
KR0140311B1 KR0140311B1 (en) 1998-07-01

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ID=19402100

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940034950A KR0140311B1 (en) 1994-12-19 1994-12-19 Process for preparing biaxially oriented polyester film

Country Status (1)

Country Link
KR (1) KR0140311B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100258569B1 (en) * 1997-11-03 2000-06-15 장용균 Process for the preparation of biaxially oriented polyester film having good thickness uniformity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100258569B1 (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
KR0140311B1 (en) 1998-07-01

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