Title:
POLYVINYL ALCOHOL FILM ROLL
Document Type and Number:
WIPO Patent Application WO/2017/038955
Kind Code:
A1
Abstract:
Provided are: a roll obtained by winding a PVA film that is at least 2,000 m long and no more than 45 μm thick, wherein the average gap between adjacent films is no more than 5 μm; and a method for manufacturing a roll obtained by winding a PVA film that is at least 2,000 m long and no more than 45 μm thick, wherein a touch-winding scheme is employed, the pressure between a film roll and a contact roll is 3-30N per meter of axial length of the film roll, and the winding speed is no more than 30 m/min. Thereby provided is a PVA film roll that has excellent external appearance and does not readily become wrinkled or eccentric even when the PVA film is thin and has a high winding length.
Inventors:
SATO NAOTO (JP)
SASAI KOUJI (JP)
HADA HIDEYUKI (JP)
KAMEOKA SEIJI (JP)
HAMAOKA TAKASHI (JP)
YAMAMOTO SHOTA (JP)
SASAI KOUJI (JP)
HADA HIDEYUKI (JP)
KAMEOKA SEIJI (JP)
HAMAOKA TAKASHI (JP)
YAMAMOTO SHOTA (JP)
Application Number:
PCT/JP2016/075731
Publication Date:
March 09, 2017
Filing Date:
September 01, 2016
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B65H75/00; B65H18/16; G02B5/30
Domestic Patent References:
| WO2013146533A1 | 2013-10-03 | |||
| WO2015115359A1 | 2015-08-06 | |||
| WO2014132625A1 | 2014-09-04 |
Foreign References:
| JP2002255409A | 2002-09-11 | |||
| JP2009084127A | 2009-04-23 | |||
| JP2006151569A | 2006-06-15 | |||
| JP2013046966A | 2013-03-07 | |||
| JP2010111450A | 2010-05-20 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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