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US 2023/0415464 A1Published application
Polyolefin resin film and multilayer body using same
AssigneeToyobo Co., Ltd.
InventorsWakato TOMATSU, Tadashi NISHI, Sakie YAMAUCHI
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Abstract
The invention provides a polyolefin resin film having high bag breakage resistance and bending pinhole resistance while having high heat-sealing strength even when stacked with a base such as a biaxially oriented polyamide resin film having high strength. The polyolefin resin film comprises a polypropylene resin composition that contains a propylene-α-olefin random copolymer, wherein a sealing layer, a core layer, and a laminate layer are included in order, respectively.
Claims8
A polyolefin resin film comprising
- a polypropylene resin composition that contains a propylene-α-olefin random copolymer, wherein
- the polyolefin resin film satisfies the following 1) to 5),
- 1) a sealing layer, a core layer, and a laminate layer are included in order, respectively,
- 2) a content of linear low-density polyethylene in the polypropylene resin composition constituting the sealing layer is not larger than 3% by weight,
- 3) a content of linear low-density polyethylene in the polypropylene resin composition constituting each of the core layer and the laminate layer is not smaller than 3% by weight and not larger than 50% by weight,
- 4) a difference of a content between the linear low-density polyethylene in the polypropylene resin composition constituting the sealing layer and the linear low-density polyethylene in the polypropylene resin composition constituting the core layer is not smaller than 1% by weight and not larger than 18% by weight, and a difference of a content between the linear low-density polyethylene in the polypropylene resin composition constituting the core layer and the linear low-density polyethylene in the polypropylene resin composition constituting the laminate layer is not smaller than 1% by weight and not larger than 18% by weight, and
- 5) the content of the linear low-density polyethylene in the polypropylene resin composition constituting the core layer is larger than the content of the linear low-density polyethylene in the polypropylene resin composition constituting the sealing layer, and the content of the linear low-density polyethylene in the polypropylene resin composition constituting the laminate layer is larger than the content of the linear low-density polyethylene in the polypropylene resin composition constituting the core layer.
4 more elements
Dependencies are inferred from the claim text.