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公开(公告)号：US20210283889A1
公开(公告)日：2021-09-16
申请号：US17262145
申请日：2019-07-10
申请人： TOYOBO CO., LTD.
发明人： Wakato TOMATSU , Takamichi GOTO , Tadashi NISHI
摘要： The objective of the present invention is to provide a packaging bag which is produced from a laminate, which is excellent in straight cut property and which hardly cause a parting, even if the laminate contains a biaxially stretched PBT film having a large distortedness of a molecular orientation axis. The laminate has a biaxially stretched film substrate consisting of a polyester resin composition and a sealant film consisting of a polyolefin resin composition, and has a straight cut property in a longitudinal direction of 5 mm or less. The polyester resin composition contains 60 wt % or more of a polybutylene telephthalate resin, and the polyolefin resin composition contains 40 wt % to 97 wt % of a propylene-ethylene block copolymer, 3 wt % to 10 wt % of an ethylene-propylene copolymer elastomer, and 0 wt % to 50 wt % of an ethylene-αolefin random copolymer.
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公开(公告)号：US20220356335A1
公开(公告)日：2022-11-10
申请号：US17619691
申请日：2020-05-26
申请人： TOYOBO CO., LTD.
发明人： Wakato TOMATSU , Tadashi NISHI
摘要： The invention provides a polyolefin-based resin film including a polyolefin-based resin composition that includes at least a propylene-α olefin random copolymer, wherein (1) an olefin-based block copolymer is 0 to 2 parts by weight based on 100 parts by weight of the propylene-α olefin random copolymer; (2) an olefin-based copolymeric elastomer resin is 0 to 2 parts by weight based on 100 parts by weight of the propylene-α olefin random copolymer; (3) a propylene homopolymer is 0 to 40 parts by weight based on 100 parts by weight of the propylene-α olefin random copolymer; (4) the polyolefin-based resin film exhibits a thermal shrinkage rate of 25% or less in a direction in which the thermal shrinkage rate is larger between a longitudinal direction and a lateral direction; and (5) a planar orientation coefficient ΔP calculated from a refractive index of the polyolefin-based resin film is 0.0100-0.0145.
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公开(公告)号：US20220348752A1
公开(公告)日：2022-11-03
申请号：US17619634
申请日：2020-05-26
申请人： TOYOBO CO., LTD.
发明人： Wakato TOMATSU , Tadashi NISHI
摘要： The invention provides a polyolefin-based resin film including a polyolefin-based resin composition that comprises a propylene-α olefin random copolymer, an ethylene-butene copolymeric elastomer, and a propylene-butene copolymeric elastomer, wherein (1) the polyolefin-based resin composition contains 2 to 9 parts by weight of the ethylene-butene copolymeric elastomer and 2 to 9 parts by weight of the propylene-butene copolymeric elastomer based on 100 parts by weight of the propylene-α olefin random copolymer; (2) the polyolefin-based resin film exhibits a thermal shrinkage rate after heating at 120° C. for 30 minutes of 25% or less in a direction in which the thermal shrinkage rate after heating at 120° C. for 30 minutes is larger between a longitudinal direction and a lateral direction of the polyolefin-based resin film; and (3) a planar orientation coefficient ΔP calculated from a refractive index of the polyolefin-based resin film is 0.0100-0.0145.
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公开(公告)号：US20230135527A1
公开(公告)日：2023-05-04
申请号：US17906283
申请日：2021-03-25
申请人： TOYOBO CO., LTD.
发明人： Wakato TOMATSU , Tadashi NISHI
摘要： The invention provides a polyolefin-based resin film formed from a polypropylene-based resin composition, the polyolefin-based resin film containing: in 100 parts by weight of a polypropylene-based resin composition, 40 to 97 parts by weight of a propylene-ethylene block copolymer; 0 to 50 parts by weight of a propylene-α olefin random copolymer or a propylene homopolymer; and 3 to 10 parts by weight of at least one type of an elastomer selected from the group consisting of an ethylene-propylene copolymer elastomer, a propylene-butene copolymer elastomer, and an ethylene-butene copolymer elastomer, wherein a heat shrinkage ratio in a longitudinal direction is not lower than 1% and not higher than 9%, and an x-axis orientation coefficient ΔNx calculated from a refractive index is not less than 0.0150 and not larger than 0.0250. The invention also provides a laminated body containing the polyolefin-based resin film, as well as a packaging body formed therefrom.
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