Title:
STRETCHED FILM AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2010195993
Kind Code:
A
Abstract:
To obtain a stretched film having high thickness uniformity by uniformly stretching syndyotactic polypropylene.
The stretched film based on syndyotactic polypropylene is produced by preserving a quickly-cooled rolled web for stretching in a cooled state and stretching the preserved rolled web at a fixed temperature or lower. The stretched film has ≤1% haze and is characterized in that the variation of the film thickness is within 20% of the average film thickness when a sample having 50 mm length is stretched and the film thickness is measured over a range of ≥50 mm in the stretched direction of the stretched sample.
Inventors:
KOIDE TETSUHIRO
OKITA HISANORI
SHIMIZU MASAKI
GONDA MASAHIRO
OKITA HISANORI
SHIMIZU MASAKI
GONDA MASAHIRO
Application Number:
JP2009044895A
Publication Date:
September 09, 2010
Filing Date:
February 26, 2009
Export Citation:
Assignee:
MITSUI CHEMICALS INC
International Classes:
C08J5/18; B29C55/02; B29K23/00; B29L7/00
Domestic Patent References:
| JP2010139735A | 2010-06-24 | |||
| JP2010139736A | 2010-06-24 | |||
| JP2010139756A | 2010-06-24 | |||
| JP2008276162A | 2008-11-13 | |||
| JP2007063484A | 2007-03-15 | |||
| JP2007253377A | 2007-10-04 | |||
| JP2007286615A | 2007-11-01 | |||
| JPH03290228A | 1991-12-19 | |||
| JP2000290443A | 2000-10-17 | |||
| JP2010139735A | 2010-06-24 | |||
| JP2010139736A | 2010-06-24 | |||
| JP2010139756A | 2010-06-24 | |||
| JP2008276162A | 2008-11-13 | |||
| JP2007063484A | 2007-03-15 | |||
| JP2007253377A | 2007-10-04 | |||
| JP2007286615A | 2007-11-01 | |||
| JPH03290228A | 1991-12-19 |
Attorney, Agent or Firm:
Koichi Washida
Kazuto Iinuma
Kazuto Iinuma