KR960010715A

KR960010715A - Biaxially Oriented Polyester Film And Method Of Making The Same

Info

Publication number: KR960010715A
Application number: KR1019940024177A
Authority: KR
Inventors: 김남일; 한준희; 이영진
Original assignee: 안시환; 주식회사 에스·케이·씨
Priority date: 1994-09-26
Filing date: 1994-09-26
Publication date: 1996-04-20
Also published as: KR0157090B1

Abstract

본 발명은 이축 배향 폴리에스테르 필름 및 이의 제조 방법에 관한 것이다. 90℃에서 1단 연신 후, 95 내지 100℃에서 2단 연신을 수행하는 종방향 2단 연신 단계, 종방향 연신 필름을 100 내지 110℃에서 예열시키는 단계, 예열시킨 필름을 110 내지 140℃에서 횡방향으로 연신시키는 단계, 횡방향 연신 필름을 210 내지 240℃에서 열고정시키면서 횡방향으로 1.5% 이완시킨 후, 180℃의 냉각존을 이완없이 통과시킨 후 다시 2차로 210℃의 열고정지역에서 횡방향으로 1.2% 이완시키는 단계, 및 횡방향 이완시킨 필름을 텐터 출구의 속도보다 0.012m/분 빠르게 권취하는 단계를 포함하는 본 발명의 방법에 의해 제조된 이축 배향 폴리에스테르 필름은 각 필름의 두께 방향의 굴절율에 대한 평균 굴절율 비 1.027 내지 1.074, 면배향도 1.165 내지 1.178, 비중 1.396 내지 1.403, 및 배향도 1.05 내지 1.25의 범위를 만족함으로써 저온열팽창계수가 1.5±0.5×10^-5/℃ 이하이고, 70℃, 60%RH의 온습도 조건하에서 96시간 처리시 0.05% 이하의 열수축을 가지며, 필름의 컬특성이 양호하다.The present invention relates to a biaxially oriented polyester film and a method for producing the same. After the first stage stretching at 90 ° C., the longitudinal two stage stretching step of performing two stage stretching at 95 to 100 ° C., preheating the longitudinally stretched film at 100 to 110 ° C., and the preheated film at 110 to 140 ° C. Stretching in the lateral direction, while releasing the transversely stretched film 1.5% in the transverse direction while heat setting at 210 to 240 ° C., passing the cooling zone at 180 ° C. without loosening, and then again transversely in the heat setting area at 210 ° C. The biaxially oriented polyester film produced by the method of the present invention comprising the step of relaxing 1.2% in the direction, and winding the transversely relaxed film 0.012 m / min faster than the speed of the tenter outlet. the average refractive index ratio of the refractive index to 1.027 to 1.074, surface orientation 1.165 to 1.178, specific gravity 1.396 to 1.403, and the degree of orientation of 1.05 to 1.25 is the low-temperature thermal expansion coefficient of 1.5 ± 0.5 by satisfying the range of × 10 ^-5 / ℃ Hayigo, it has a thermal shrinkage of 0.05% or less when treated under 96 hours 70 ℃, in 60% RH humidity condition, has good curl properties of the film.

Description

Biaxially Oriented Polyester Film And Method Of Making The Same

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims

The biaxially-oriented polyester film which satisfy | fills the following formula simultaneously.

1.027 < n _A / n _ZD < … (One)

1.165 < DELTA P < … (2)

1.396 <p <1.403. … (3)

1.050 < f ^B ₁ / f ^B ₂ < … (4)

In the above formula, n _A is the average refractive index, n _ZD is the thickness direction refractive index, ΔP is the light orientation, ρ is the specific gravity, f ^B ₁ / f ^B ₂ is the orientation ratio between the longitudinal direction and the transverse direction.

Stretching in the longitudinal direction at 90 ° C. in one step followed by stretching in two steps at 95 to 100 ° C .; Preheating the longitudinally stretched film at 100 to 110 ° C; Stretching the preheated film in a transverse direction at 110 to 140 ° C .; After releasing the transversely stretched film in the transverse direction while heat setting at 210 to 240 ° C., passing the cooling zone at 170 to 190 ° C. without loosening, and relaxing in the transverse direction while heat setting at 200 to 220 ° C. secondly. step; And winding the film relaxed in the lateral direction faster than the speed of the tenter outlet.

The film stretched in the transverse direction is 1.5% in the transverse direction while heat setting at 210 to 240 ℃, 1.2% in the transverse direction while heat setting at 200 to 220 ℃, relaxed in the transverse direction The winding speed of the made film is 0.012 m / min faster than the tender exit speed, The manufacturing method of the biaxially-oriented polyester film characterized by the above-mentioned.

※ Note: The disclosure is based on the initial application.