Title:
POLYOLEFIN-BASED RESIN FILM, AND LAMINATE USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/200593
Kind Code:
A1
Abstract:
Provided is a polyolefin resin film such that, when laminated with a substrate film having large distortion of the molecular orientation axis, such as a biaxially stretched polyamide resin film, a packaging pouch obtained from said laminate has excellent transparency, heat seal properties, straight-line cuttability, tearing properties, pouch-making properties and pouch rip resistance, and is not susceptible to forming tufts when opening. A polyolefin resin film comprising a polypropylene resin composition, wherein: 100 parts by weight of the polypropylene resin composition contains 20-95 parts by weight of a propylene-α olefin random copolymer containing a metallocene olefin polymerization catalyst, 0-75 parts by weight of a propylene-α olefin random copolymer containing a Ziegler-Natta olefin polymerization catalyst, and 5-15 parts by weight of at least one elastomer selected from the group consisting of ethylene-butene copolymer elastomers, propylene-butene copolymer elastomers, and ethlene-propylene copolymer elastomers; the heat shrinkage in the larger amongst the length direction and the width direction of the polyolefin resin film is 1-10%; and the x-axis orientation factor ΔNx calculated from the refractive index of the polyolefin resin film is 0.0130-0.0250.
Inventors:
TOMATSU WAKATO (JP)
NISHI TADASHI (JP)
NISHI TADASHI (JP)
Application Number:
PCT/JP2021/012698
Publication Date:
October 07, 2021
Filing Date:
March 25, 2021
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; B32B27/32; B65D65/40; C08L23/00; B29C55/04; B29K23/00
Domestic Patent References:
WO2019123944A1 | 2019-06-27 |
Foreign References:
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