Title:
POLYPROPYLENE-BASED LAMINATE FILM
Document Type and Number:
WIPO Patent Application WO/2019/065306
Kind Code:
A1
Abstract:
To provide a heat-sealable stretched polypropylene laminate film which has a low shrinkage rate at 150°C comparable to the shrinkage rate of PET and a high rigidity. A polypropylene-based laminate film which comprises a substrate layer (A), said substrate layer (A) being formed of a polypropylene resin satisfying requirements 1) to 4), and a heat seal layer (B) formed of a polyolefin-based resin, said heat seal layer (B) being laminated on one or both faces of the substrate layer, wherein the lower limit of the plane orientation coefficient of the film is 0.0125. 1) The lower limit of the mesopentad fraction is 96%. 2) The upper limit of the content of comonomer(s) other than propylene is 0.1 mol%. 3) The ratio [mass-average molecular weight (Mw)/number-average molecular ratio (Mn)] is 3.0-5.4 inclusive. 4) The melt flow rate (MFR) measured at 230°C and 2.16 kgf is 6.2-9.0 g/10 min inclusive.
Inventors:
KINOSHITA OSAMU (JP)
YAMADA KOJI (JP)
YAMADA KOJI (JP)
Application Number:
PCT/JP2018/034179
Publication Date:
April 04, 2019
Filing Date:
September 14, 2018
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B27/32; C08F110/06
Domestic Patent References:
| WO2014002934A1 | 2014-01-03 | |||
| WO2015012165A1 | 2015-01-29 | |||
| WO2015012324A1 | 2015-01-29 | |||
| WO2017170244A1 | 2017-10-05 |
Foreign References:
| JP2007508423A | 2007-04-05 | |||
| JP2003205584A | 2003-07-22 |
Download PDF: