Title:
METHOD FOR MANUFACTURING OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2019/207863
Kind Code:
A1
Abstract:
In a step of conveying a flow cast film (5) after being released from a support body (3), a region (R) to be heated that is a part in a widthwise direction of the flow casting film (5) released from the support body (3) is heated with a heat source (15) not in contact with the flow casting film (5). A widthwise outermost end (E1) of the region (R) to be heated is at a position shifted from a position corresponding to a widthwise outermost end (E0) of the flow casting film (5) before being released, toward the widthwise inner side by a distance of P% with respect to an entire width W of the flow casting film (5), wherein P is 1% or more and 20% or less. When the boiling point of a good solvent contained in dope cast on the support body (3) is T°C, the region (R) to be heated has a surface temperature of T + 40°C to T + 110°C when heated.
Inventors:
KAWANO YUKI (JP)
NAKAJIMA SHINNOSUKE (JP)
NAKAJIMA SHINNOSUKE (JP)
Application Number:
PCT/JP2019/001993
Publication Date:
October 31, 2019
Filing Date:
January 23, 2019
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
B29C41/46; B29C41/28; B29C41/52; C08J5/18; G02B5/30
Domestic Patent References:
| WO2018070146A1 | 2018-04-19 |
Foreign References:
| JP2010023312A | 2010-02-04 | |||
| JP2003175523A | 2003-06-24 | |||
| JP2007076001A | 2007-03-29 | |||
| JP2008221508A | 2008-09-25 | |||
| JP2011098442A | 2011-05-19 | |||
| JP2007290345A | 2007-11-08 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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