Title:
POLYVINYL ALCOHOL POLYMER FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/190235
Kind Code:
A1
Abstract:
The present invention pertains to a PVA film having a thickness of 55 μm or less wherein the PVA film has five or fewer dashed-line stripes, arranged substantially linearly over 10 cm or more in the direction of flow of the film with the irregularities having a period of 0.01-10 mm, per 1 m of the widthwise direction of the film; and to a method for producing a PVA film having a thickness of 55 μm or less wherein the production method uses a film-forming apparatus equipped with a plurality of drying rolls, the rotating axes of which are mutually parallel, and the discharge speed (SO) of the film-forming solution is 2.5-5.0 m/min when a PVA film is produced by discharging in film form a film-forming solution containing PVA onto a first drying roll of the film-forming apparatus and drying, then also drying by the second and subsequent drying rolls.
Inventors:
MORI YASUJIRO (JP)
INOSHITA SHOHEI (JP)
INOSHITA SHOHEI (JP)
Application Number:
PCT/JP2016/064993
Publication Date:
December 01, 2016
Filing Date:
May 20, 2016
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C55/06; B29C41/26; B29C41/52; G02B5/30; B29K29/00; B29L7/00; B29L11/00
Foreign References:
| JPS3823037B1 | ||||
| JPS4631474B | ||||
| JPS52133371A | 1977-11-08 | |||
| JP2000301555A | 2000-10-31 | |||
| JP2005231185A | 2005-09-02 | |||
| JP2006199927A | 2006-08-03 |
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