发明名称 |
METHOD FOR PRODUCING PHASE-DIFFERENCE FILM AND METHOD FOR PRODUCING CIRCULARLY POLARIZING PLATE |
摘要 |
Provided is a method capable of producing a retardation film being excellent in axial accuracy, showing small changes in retardation and dimensions at the time of its heating, and having a slow axis in an oblique direction with high production efficiency. The production method for a retardation film of the present invention includes: holding left and right end portions of a film with left and right variable pitch-type clips configured to have clip pitches changing in a longitudinal direction, respectively; preheating the film; causing the clip pitches of the left and right clips to each independently change to obliquely stretch the film; reducing the clip pitches of the left and right clips to shrink the film in the longitudinal direction; and releasing the film from being held with the clips. |
申请公布号 |
US2016062019(A1) |
申请公布日期 |
2016.03.03 |
申请号 |
US201414780695 |
申请日期 |
2014.03.12 |
申请人 |
NITTO DENKO CORPORATION |
发明人 |
Shimizu Takashi;Hirata Satoshi;Kondo Seiji;Murakami Nao |
分类号 |
G02B5/30;G02B1/04;B29D11/00 |
主分类号 |
G02B5/30 |
代理机构 |
|
代理人 |
|
主权项 |
1. A production method for a retardation film, comprising:
holding left and right end portions of a film with left and right variable pitch-type clips configured to have clip pitches changing in a longitudinal direction, respectively; preheating the film; causing the clip pitches of the left and right clips to each independently change to obliquely stretch the film; reducing the clip pitches of the left and right clips to shrink the film in the longitudinal direction; and releasing the film from being held with the clips. |
地址 |
Ibaraki-shi, Osaka JP |