KR102508041B1 - 광학 필름의 제조 방법 - Google Patents
광학 필름의 제조 방법 Download PDFInfo
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- KR102508041B1 KR102508041B1 KR1020150120261A KR20150120261A KR102508041B1 KR 102508041 B1 KR102508041 B1 KR 102508041B1 KR 1020150120261 A KR1020150120261 A KR 1020150120261A KR 20150120261 A KR20150120261 A KR 20150120261A KR 102508041 B1 KR102508041 B1 KR 102508041B1
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- South Korea
- Prior art keywords
- active energy
- energy ray
- optically anisotropic
- irradiation
- anisotropic layer
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Abstract
[해결수단] 기재와 배향막을 갖는 적층체의 배향막 상에, 중합성 액정 화합물을 포함하는 조성물을 도포하는 공정과, 상기 조성물이 도포된 적층체에 활성 에너지선을 조사하는 공정을 포함하는 광학 필름을 제조하는 방법으로서, 상기 활성 에너지선을 조사하는 공정은 2회 이상의 활성 에너지선 조사를 포함하고, 1회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지와 2회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지와의 비가, 식 (2-1)을 만족하면서, 또한 2회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지가, 10∼10000 mJ/㎠인 광학 필름의 제조 방법.
Description
도 2는 본 발명에 있어서의 활성 에너지선 조사 공정의 일례를 도시한다.
도 3은 본 발명에 있어서의 활성 에너지선 조사 공정의 일례를 도시한다.
1A, 1A': 권심(winding core)
2, 2': 롤
2A, 2A': 권심
3, 3': 냉각 장치
4, 4': 자외선 조사 장치
Claims (12)
- 기재와 배향막을 갖는 적층체의 배향막 상에, 중합성 액정 화합물을 포함하는 조성물을 도포하는 공정과, 상기 조성물이 도포된 적층체에 활성 에너지선을 조사하는 공정을 포함하는 광학 필름을 제조하는 방법으로서,
상기 활성 에너지선을 조사하는 공정은, 2회 이상의 활성 에너지선 조사를 포함하고, 1회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지와 2회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지와의 비가 하기 식 (2-1)을 만족하고, 또한 2회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지가 10∼10000 mJ/㎠이고,
상기 활성 에너지를 조사하는 공정은, 중합성 액정 화합물이 도포되어 있는 면 측으로부터의 활성 에너지선 조사를 포함하고, 상기 중합성 액정 화합물이 도포되어 있는 면 측으로부터의 활성 에너지선 조사의 후에, 기재 측으로부터 활성 에너지선을 조사하는 공정을 포함하는, 광학 필름의 제조 방법:
15 > (1회째의 조사 에너지)/(2회째의 조사 에너지) > 0.1 (2-1) - 제1항에 있어서, 활성 에너지선을 조사하는 공정은, 적어도 1회의 활성 에너지선 조사에 있어서, 활성 에너지선 스펙트럼의 파장 380 nm와 파장 365 nm의 강도의 비가 이하의 식 (1)을 만족하는, 광학 필름의 제조 방법:
파장 380 nm의 광의 강도/파장 365 nm의 광의 강도 > 0.1 (1) - 삭제
- 삭제
- 삭제
- 제1항에 있어서, 1회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지와 2회째의 활성 에너지선 조사에 있어서의 활성 에너지선의 에너지의 비가 이하의 식 (2-2)을 만족하는, 광학 필름의 제조 방법:
10 > (1회째의 조사 에너지)/(2회째의 조사 에너지) > 0.2 (2-2) - 제1항에 있어서, 광학 이방성층이 이하의 식 (3) 및 (4)를 만족하는 광학 이방층인, 광학 필름의 제조 방법:
Re(450)/Re(550) ≤ 1.00 (3)
1.00 ≤ Re(650)/Re(550) (4)
(식에서, Re(λ)는 파장 λ nm의 광에 대한 면내 위상차 값을 나타낸다.) - 제1항에 있어서, 광학 이방성층이 이하의 식 (6-2)를 만족하는 광학 이방층인, 광학 필름의 제조 방법:
100 nm < Re(550) < 160 nm (6-2)
(식에서, Re(550)은 파장 550 nm의 광에 대한 면내 위상차 값을 나타낸다.) - 제1항에 있어서, 광학 이방성층의 두께가 0.3∼5 ㎛인, 광학 필름의 제조 방법.
- 제1항에 있어서, 중합성 액정 화합물을 포함하는 조성물이 중합성 액정 화합물과 중합개시제를 포함하는 조성물인, 광학 필름의 제조 방법.
- 제1항에 있어서, 배향막이 광 배향막인, 광학 필름의 제조 방법.
- 제1항에 있어서, 배향막의 두께가 10∼1000 nm인, 광학 필름의 제조 방법.
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