Title:
WEB STRETCHING METHOD AND METHOD FOR PRODUCING RETARDATION FILM
Document Type and Number:
WIPO Patent Application WO/2011/013292
Kind Code:
A1
Abstract:
Provided are a web stretching method and a method for producing a retardation film, by which a length in the film moving direction can be shortened in a heating chamber, and variability of the film tension in the width direction as well as scratches, etc., can be prevented.
When a web (8) is transferred into a heating chamber (2) and is stretched, by pinch rolls arranged at an entrance side and an exit side of a heating chamber (2), at least one transfer guide (1) is arranged in a heating space (21). Further, heated fluid is discharged from a plurality of fluid discharge holes (9) formed on a surface of the transfer guide (1) to form a fluid layer (11), and the web (8) can be moved without being in contact with the transfer guide (1) using the fluid layer (11) as a transfer surface. Thereby, a film can be uniformly stretched while suppressing the production cost.
Inventors:
FUKUI GO (JP)
INAZAWA HIROSHI (JP)
OTA KAZUHIDE (JP)
KUBO SATOSHI (JP)
NAKAMURA TAKUJI (JP)
FUJII TADASHI (JP)
INAZAWA HIROSHI (JP)
OTA KAZUHIDE (JP)
KUBO SATOSHI (JP)
NAKAMURA TAKUJI (JP)
FUJII TADASHI (JP)
Application Number:
PCT/JP2010/004022
Publication Date:
February 03, 2011
Filing Date:
June 17, 2010
Export Citation:
Assignee:
TOYO KOHAN CO LTD (JP)
FUKUI GO (JP)
INAZAWA HIROSHI (JP)
OTA KAZUHIDE (JP)
KUBO SATOSHI (JP)
NAKAMURA TAKUJI (JP)
FUJII TADASHI (JP)
FUKUI GO (JP)
INAZAWA HIROSHI (JP)
OTA KAZUHIDE (JP)
KUBO SATOSHI (JP)
NAKAMURA TAKUJI (JP)
FUJII TADASHI (JP)
International Classes:
B29C55/06; G02B5/30; B29L7/00
Foreign References:
| JP2008221722A | 2008-09-25 | |||
| JPH0976343A | 1997-03-25 | |||
| JP2002333521A | 2002-11-22 | |||
| JP2009190320A | 2009-08-27 | |||
| JP2009226847A | 2009-10-08 |
Attorney, Agent or Firm:
OHTA PATENT OFFICE (JP)
Patent business corporation Ota patent firm (JP)
Patent business corporation Ota patent firm (JP)
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