公开(公告)号：US20230407028A1

公开(公告)日：2023-12-21

申请号：US18254106

申请日：2021-11-19

Applicant: TOYOBO CO., LTD.

Inventor： Kazuya KIRIYAMA ,  Toru IMAI ,  Osamu KINOSHITA

IPC: C08J7/04

CPC classification number: C08J7/0427 ,  C08J2423/06 ,  C08J2323/12

Abstract: The invention provides a biaxially oriented polypropylene resin film containing a base layer (A) formed of a polypropylene-based resin composition containing polypropylene-based resin and polyethylene-based resin; and a surface layer (B) disposed on at least one side of the base layer (A), wherein a) the polypropylene-based resin having the lowest DSC melting point in the polypropylene-based resin composition of base layer (A) has a melting point peak temperature of not lower than 160° C., b) a ratio of α-olefin monomer-derived component to a total of a propylene monomer-derived component and the α-olefin monomer-derived component in the polypropylene-based resin of base layer (A) is not larger than 0.2 mol %, c) the amount of polyethylene-based resin of base layer (A) is 1-20 wt % of a total of polypropylene-based resin and polyethylene-based resin of base layer (A), and d) the biaxially oriented polypropylene resin film has a haze of not larger than 7%.

公开(公告)号：US20230212362A1

公开(公告)日：2023-07-06

申请号：US18000744

申请日：2021-06-09

Applicant: TOYOBO CO., LTD.

Inventor： Mahiro NAKANO ,  Toru IMAI

IPC: C08J5/18 ,  B32B27/08 ,  B32B27/32

CPC classification number: C08J5/18 ,  B32B27/08 ,  B32B27/32 ,  C08J2323/12 ,  B32B2250/03 ,  B32B2250/242 ,  B32B2307/30 ,  B32B2307/412 ,  B32B2307/418 ,  B32B2307/54 ,  B29C48/0018

Abstract: Provided is a biaxially oriented polypropylene film that has high stiffness, has excellent heat resistance at a high temperature of 150° C., easily maintains a bag shape when being made into a packaging bag, and has less pitch shift during printing or fewer wrinkles in a sealed portion when being heat-sealed. A biaxially oriented polypropylene film, wherein a stress at 5% elongation (F5) at 23° C. of the biaxially oriented polypropylene film is not lower than 40 MPa in a longitudinal direction and not lower than 160 MPa in a width direction, and a heat shrinkage rate at 150° C. of the biaxially oriented polypropylene film is not higher than 7% in the longitudinal direction and not higher than 16% in the width direction.

公开(公告)号：US20230212361A1

公开(公告)日：2023-07-06

申请号：US18000719

申请日：2021-06-09

Applicant: TOYOBO CO., LTD.

Inventor： Mahiro NAKANO ,  Toru IMAI

IPC: C08J5/18 ,  B32B27/32 ,  B32B27/08

CPC classification number: C08J5/18 ,  B32B27/32 ,  B32B27/08 ,  C08J2323/12 ,  B32B2307/518 ,  B32B2250/242 ,  B32B2307/418 ,  B32B2307/414 ,  B32B2307/30 ,  B32B27/16

Abstract: Provided is a biaxially oriented polypropylene film that can enhance function of having high stiffness, having excellent heat resistance at a high temperature of 150° C., easily maintaining a bag shape when being made into a packaging bag, having less pitch shift during printing or fewer wrinkles in a sealed portion when being heat-sealed, and improving lamination strength. A biaxially oriented polypropylene film comprising a base layer (A), an intermediate layer (B), and a surface layer (C), wherein a stress at 5% elongation (F5) at 23° C. of the biaxially oriented polypropylene film is not lower than 40 MPa in a longitudinal direction and not lower than 160 MPa in a width direction, and a heat shrinkage rate at 150° C. of the biaxially oriented polypropylene film is not higher than 10% in the longitudinal direction and not higher than 30% in the width direction.

公开(公告)号：US20210388193A1

公开(公告)日：2021-12-16

申请号：US17417849

申请日：2019-12-19

Applicant: TOYOBO CO., LTD.

Inventor： Kouji YAMADA ,  Kazuhito HORINOUCHI ,  Mahiro NAKANO ,  Toru IMAI

IPC: C08L23/12 ,  C08J5/18 ,  B29C55/12

Abstract: The invention provides a biaxially oriented polypropylene film with a storage elastic modulus (E′-23) of at least 2.0 GPa in a longitudinal direction and at least 6.0 GPa in a width direction, a storage elastic modulus E′ (E′-80) of at least 1.0 GPa in the longitudinal direction and at least 3.0 GPa in the width direction, a ratio (E′-80/E′-23) of E′-80 to E′-23 of at least 0.4 in both the longitudinal direction and the width direction, a heat shrinkage rate at 150° C. of not higher than 10% in the longitudinal direction and not higher than 30% in the width direction, a heat shrinkage rate at 120° C. of not higher than 2.0% in the longitudinal direction and not higher than 5.0% in the width direction, and a heat shrinkage rate at 120° C. in the longitudinal direction that is lower than the heat shrinkage rate at 120° C. in the width direction.

公开(公告)号：US20250066565A1

公开(公告)日：2025-02-27

申请号：US18724457

申请日：2022-12-15

Applicant: TOYOBO CO., LTD.

Inventor： Atsushi KANAYA ,  Toru IMAI

IPC: C08J5/18 ,  C08J3/28

Abstract: Provided is a biaxially oriented polypropylene film that is suitable as a raw film for processing and that, without impairing excellent transparency and mechanical properties intrinsically possessed by the biaxially oriented polypropylene film, exhibits excellent adhesiveness at the time of vapor deposition, coating, or lamination with another film and also has favorable slipperiness and blocking resistance. The biaxially oriented polypropylene film contains a base material layer (A) and a surface layer (B), each of which contains a polypropylene-based resin as a main component, wherein (1) the number of protrusions of 500 nm or larger in a surface area of 2000 μm2 on the surface layer (B) is 50-200, (2) a surface of the surface layer (B) has a wetting tension of 38 mN/m or higher, (3) the surface has a Martens hardness of 350 N/mm2 or lower, and (4) the surface has an arithmetic average roughness (Ra) of 1.5-3.0 nm.

公开(公告)号：US20230203257A1

公开(公告)日：2023-06-29

申请号：US17906568

申请日：2021-03-22

Applicant: TOYOBO CO., LTD.

Inventor： Kensuke TANEKI ,  Toru IMAI ,  Kouji YAMADA ,  Kazuhito HORINOUCHI ,  Mahiro NAKANO

IPC: C08J5/18 ,  C08L23/12 ,  B65D65/40

CPC classification number: C08J5/18 ,  B65D65/40 ,  C08L23/12 ,  C08J2323/12 ,  C08J2423/12 ,  C08L2205/025

Abstract: The present invention provides a biaxially-oriented polypropylene film having high stiffness, excellent heat resistance to high temperature as high as 150° C., easiness of maintaining its bag shape when made into a packaging bag, less printing pitch shift at the time of printing, and less wrinkles of heat sealed part when heat sealed. The biaxially-oriented polypropylene film satisfies the following formulae (1) to (3): (1) a half width of a peak derived from an oriented crystal in a width direction of the film in an azimuth dependence of a (110) plane of polypropylene α-type crystal through measurement with wide-angle X rays diffraction is 25° or less; (2) the film has a heat-shrinkage ratio at 150° C. of 10% or less in a longitudinal direction and 24% or less in a width direction; and (3) the film has a tensile elongation at break at 23° C. of 195% or more in the longitudinal direction.

公开(公告)号：US20250059335A1

公开(公告)日：2025-02-20

申请号：US18724475

申请日：2022-12-15

Applicant: TOYOBO CO., LTD.

Inventor： Atsushi KANAYA ,  Toru IMAI

IPC: C08J5/18 ,  C08J3/22 ,  C08J3/28

Abstract: Provided is a biaxially oriented polypropylene-based film that is suitable as a raw film for processing and that, without impairing excellent transparency and mechanical properties intrinsically possessed by the biaxially oriented polypropylene-based film, exhibits excellent adhesiveness at the time of vapor deposition, coating, or lamination with another film and also has favorable slipperiness and blocking resistance. The biaxially oriented polypropylene-based film contains at least base material layer (A), surface layer (B), and surface layer (C), each containing a polypropylene-based resin as a main component, wherein each of surface layers (B) and (C) has a wetting tension of 38 mN/m or higher and 50-200 protrusions of 500 nm or larger in a surface area of 2000 μm2, and surface layers (B) and (C) have a Martens hardness of 350 N/mm2 or lower and 270 N/mm2 or lower, respectively, and an arithmetic average roughness (Ra) of 1.5-3.0 nm and 3.5-5.5 nm, respectively.

公开(公告)号：US20240209167A1

公开(公告)日：2024-06-27

申请号：US18577439

申请日：2022-06-21

Applicant: TOYOBO CO., LTD.

Inventor： Kensuke TANEKI ,  Toru IMAI

IPC: C08J5/18

CPC classification number: C08J5/18 ,  C08J2323/12

Abstract: The invention provides a biaxially oriented laminated polypropylene film including base layer A and surface layer B, each of which comprises a resin composition containing a polypropylene resin as a main component, wherein a thickness of base layer A with respect to a whole thickness of the film is 70-98%, a polypropylene resin comprised in base layer A has a mesopentad fraction of 97.0-99.9%, a polypropylene resin comprised in surface layer B has a mesopentad fraction of 80.0-96.5%, a stress at 5% elongation F5 in a longitudinal direction of the film is 35 MPa or more, a stress at 5% elongation F5 in a width direction of the film is 95 MPa or more, a heat shrinkage rate at 150° C. in the longitudinal direction of the film is 6.0% or less, and a heat shrinkage rate at 150° C. in the width direction of the film is 5.0% or less.

公开(公告)号：US20230330977A1

公开(公告)日：2023-10-19

申请号：US18003230

申请日：2021-06-14

Applicant: TOYOBO CO., LTD.

Inventor： Mahiro NAKANO ,  Toru IMAI

IPC: B32B27/32 ,  B32B7/03 ,  B32B27/08 ,  B32B7/022 ,  B32B7/023 ,  C08J5/18

CPC classification number: B32B27/32 ,  B32B7/022 ,  B32B7/023 ,  B32B7/03 ,  B32B27/08 ,  C08J5/18 ,  B32B2250/03 ,  B32B2250/242 ,  B32B2307/518 ,  B32B2307/536 ,  B32B2307/538 ,  B32B2310/022 ,  B32B2323/10 ,  C08J2323/12

Abstract: The invention provides a biaxially-oriented polypropylene film that contains a base layer (A) comprising a polypropylene resin as a main component, a surface layer (B) provided at one side of the base layer (A), and a surface layer (C) provided at one side of the base layer (A) opposite to the surface layer (B), wherein the surface layer (B) has a wetting tension of 38 mN or more, a surface resistance value of 14.0 LogΩ or more, an arithmetic average roughness (Ra) of 3.0-5.5 nm, a Martens hardness of 248 N/mm2 or less, and a center plane average surface roughness (SRa) of 0.010-0.026 µm, and the surface layer (C) has a center plane average surface roughness (SRa) of 0.020 µm or more and a Martens hardness of 270 N/mm2 or more.

公开(公告)号：US20220081521A1

公开(公告)日：2022-03-17

申请号：US17417831

申请日：2019-12-19

Applicant: TOYOBO CO., LTD.

Inventor： Kouji YAMADA ,  Kazuhito HORINOUCHI ,  Mahiro NAKANO ,  Toru IMAI

IPC: C08J5/18 ,  B29C48/00 ,  B29C48/08 ,  B29C55/00 ,  B29C55/14

Abstract: The invention provides a biaxially oriented polypropylene film, wherein a relationship between a loop stiffness stress (S [mN]) in a longitudinal direction and a thickness (t [μm]) satisfies the formula S≥0.00020×t3, a relationship between a loop stiffness stress (S [mN]) in a width direction and the thickness (t [μm]) satisfies the formula S≥0.0010×t3, and a heat shrinkage rate of the biaxially oriented polypropylene film at 150° C. is not higher than 10% in the longitudinal direction and not higher than 30% in the width direction, a heat shrinkage rate of the biaxially oriented polypropylene film at 120° C. is not higher than 2.0% in the longitudinal direction and not higher than 5.0% in the width direction, and the heat shrinkage rate at 120° C. in the longitudinal direction is lower than the heat shrinkage rate at 120° C. in the width direction.