Title:
ポリプロピレン系積層フィルム
Document Type and Number:
Japanese Patent JP7409459
Kind Code:
B2
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.
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Inventors:
Osamu Kinoshita
Koji Yamada
Koji Yamada
Application Number:
JP2022166463A
Publication Date:
January 09, 2024
Filing Date:
October 17, 2022
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
B32B27/32; B65D65/40; C08F110/06; C08J5/18; C08L23/12
Domestic Patent References:
| JP2007508423A | ||||
| JP2003205584A |
Foreign References:
| WO2014002934A1 | ||||
| WO2015012165A1 | ||||
| WO2015012324A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation ASFI International Patent Office