Title:
POLYOLEFIN-BASED RESIN FILM, AND LAMINATE USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/255643
Kind Code:
A1
Abstract:
Provided is a polyolefin-based resin film for a packaging bag obtained from a laminate with a substrate film having a large distortion of a molecular orientation axis such as a biaxially oriented polyamide-based resin film, wherein the packaging bag not only has excellent transparency, sealing properties, bag-making properties, and bag-rupture resistance, but also can be easily torn without generating wrinkles. The polyolefin-based resin film is composed of a polyolefin-based resin composition containing a propylene-α-olefin random copolymer, an ethylene-butene copolymer elastomer, and a propylene-butene copolymer elastomer, and satisfies 1) to 3) below. 1) The polyolefin-based resin composition contains 2-9 parts by weight of the ethylene-butene copolymer elastomer and 2-9 parts by weight of the propylene-butene copolymer elastomer with respect to 100 parts by weight of the propylene-α-olefin random copolymer. 2) The polyolefin-based resin film has a heat shrinkage of 25% or less in one direction among the longitudinal direction and the width direction thereof, with a smaller heat shrinkage in the other direction, after being heated at 120°C for 30 minutes. 3) The polyolefin-based resin film has a plane orientation coefficient ΔP of 0.0100-0.0145 as calculated from the refractive index thereof.
Inventors:
TOMATSU WAKATO (JP)
NISHI TADASHI (JP)
NISHI TADASHI (JP)
Application Number:
PCT/JP2020/020689
Publication Date:
December 24, 2020
Filing Date:
May 26, 2020
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B29C55/06; B29C61/06; B32B27/32; B65D65/40; C08L23/08; C08L23/14; B29K23/00; B29L9/00
Domestic Patent References:
| WO2019065306A1 | 2019-04-04 | |||
| WO2017170244A1 | 2017-10-05 | |||
| WO2019244708A1 | 2019-12-26 |
Foreign References:
| JPS5611249A | 1981-02-04 | |||
| JP2002003619A | 2002-01-09 | |||
| JP5790497B2 | 2015-10-07 | |||
| JPS5411935B2 | 1979-05-18 | |||
| JP2016032911A | 2016-03-10 | |||
| JP2018079583A | 2018-05-24 | |||
| JP2014141302A | 2014-08-07 |
Other References:
See also references of EP 3988279A4
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