Abstract: The invention provides a polyolefin-based resin film including a polyolefin-based resin composition that comprises a propylene-? 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-? 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 ?P calculated from a refractive index of the polyolefin-based resin film is 0.0100-0.0145.

Abstract: Provided is a multilayer body having favorable thermal dimensional stability and capable of producing a food-packaging bag where without providing any perforations or guiding lines through laser half-cutting, a resistance at opening by tearing is low, and only a small extent of parting occurs; and a step is formed between opening ends on the front and back sides to be easily opened and contents can easily be taken out therefrom. A multilayer body having one or more types of base material films; and a polyolefin-based resin sealant film made from a polyolefin-based resin composition containing a propylene-?-olefin random copolymer, wherein 1) the base material films have orientation angles, a sum of absolute values of which is 250 to 85°, 2) the sealant film has a piercing strength of 5.0 to 15.0 N, and 3) the sealant film has an orientation coefficient ?Nx, in a longitudinal direction, of 0.0150 to 0.0230.

Abstract: The invention provides a polyolefin-based resin film that allows, even when the polyolefin-based resin film is laminated with a base film having a large strain in the molecular orientation axis, a packaging bag obtained from a laminated body thereof to be excellent in straight cuttability and ease of tearing, less likely to be broken, and excellent in slipperiness. The polyolefin-based resin film is formed from a polypropylene-based resin composition, wherein a polyolefin-based resin forming the polypropylene-based resin composition contains, in a total of 100 parts by weight of the polyolefin-based resin forming the polypropylene-based resin composition, 55 to 80 parts by weight of a propylene-ethylene block copolymer; 10-30 parts by weight of a propylene-? olefin random copolymer; and 10-30 parts by weight of a linear low-density polyethylene having a melting point of 112-130° C., wherein the polyolefin-based resin film has an orientation coefficient ?Nx in a longitudinal direction of 0.0120-0.0250.

Abstract: The invention provides a polyolefin-based resin film including a polyolefin-based resin composition that includes at least a propylene-? 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-? 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-? olefin random copolymer; (3) a propylene homopolymer is 0 to 40 parts by weight based on 100 parts by weight of the propylene-? 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 ?P calculated from a refractive index of the polyolefin-based resin film is 0.0100-0.0145.

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-?-olefin random copolymer, wherein a sealing layer, a core layer, and a laminate layer are included in order, respectively.

Abstract: The invention provides a multilayer body that includes a base film such as a biaxially oriented polyamide resin film having high strength and a polyolefin resin film, and that has high bag breakage resistance and bending pinhole resistance while having high heat-sealing strength. The multilayer body comprises a polyolefin resin film that includes a polypropylene resin composition that contains a propylene-?-olefin random copolymer; and a biaxially stretched nylon film, wherein a sealing layer, a core layer, and a laminate layer are included in order, respectively.

Abstract: A polyolefin-based resin film containing (a) 90 to 97 parts by weight of at least one polyolefin-based resin selected from a propylene-ethylene block copolymer and a propylene-? olefin random copolymer and (b) 3 to 10 parts by weight of an ethylene-propylene copolymer elastomer, wherein the propylene-? olefin random copolymer is present in an amount of 0 to 50% by weight relative to the total amount of the propylene-ethylene block copolymer and the propylene-? olefin random copolymer, and the polyolefin-based resin film has a thermal shrinkage ratio in a longitudinal direction of 3% or more and 20% or less, a thermal shrinkage ratio in a rectangular direction to a width direction of 1% or less, and a yield stress in the longitudinal direction of 150 MPa or more and 250 MPa or less.

Abstract: The invention provides a polyolefin-based resin film formed from a polypropylene-based resin composition and containing, in a total of 100 parts by weight of the polypropylene-based resin composition, 20-95 parts by weight of a propylene-? olefin random copolymer containing a metallocene-based olefin polymerization catalyst; 0-75 parts by weight of a propylene-? olefin random copolymer containing a Ziegler-Natta-based olefin polymerization catalyst; and 5-15 parts by weight of at least one type of an elastomer selected from the group consisting of an ethylene-butene copolymer elastomer, a propylene-butene copolymer elastomer, and an ethylene-propylene copolymer elastomer, wherein a heat shrinkage ratio in a direction in which a heat shrinkage ratio is larger among a longitudinal direction and a width direction of the polyolefin-based resin film is 1-10%, and an orientation coefficient ?Nx in an x-axis direction calculated from a refractive index of the polyolefin-based resin film is 0.0130-0.0250.

Abstract: 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-? 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 ?Nx 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.

Abstract: The invention provides a polyolefin-based resin film including a polyolefin-based resin composition that includes at least a propylene-? 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-? 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-? olefin random copolymer; (3) a propylene homopolymer is 0 to 40 parts by weight based on 100 parts by weight of the propylene-? 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 ?P calculated from a refractive index of the polyolefin-based resin film is 0.0100-0.0145.

Abstract: The invention provides a polyolefin-based resin film including a polyolefin-based resin composition that comprises a propylene-? 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-? 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 ?P calculated from a refractive index of the polyolefin-based resin film is 0.0100-0.0145.

Abstract: 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-?olefin random copolymer.

Abstract: 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-?olefin random copolymer.

Abstract: A polyolefin-based resin film containing (a) 90 to 97 parts by weight of at least one polyolefin-based resin selected from a propylene-ethylene block copolymer and a propylene-? olefin random copolymer and (b) 3 to 10 parts by weight of an ethylene-propylene copolymer elastomer, wherein the propylene-? olefin random copolymer is present in an amount of 0 to 50% by weight relative to the total amount of the propylene-ethylene block copolymer and the propylene-? olefin random copolymer, and the polyolefin-based resin film has a thermal shrinkage ratio in a longitudinal direction of 3% or more and 20% or less, a thermal shrinkage ratio in a rectangular direction to a width direction of 1% or less, and a yield stress in the longitudinal direction of 150 MPa or more and 250 MPa or less.

Abstract: Provided is a polyethylene film showing more excellent blocking resistance in unwinding from the film roll state and more excellent blocking resistance between sealants after lamination with a base material, and having transparency and excellent heat sealing property even at low temperatures. A polyethylene film wherein in at least either face, a ratio between an arithmetic mean roughness in a machine direction of film (Ra(MD)), and an arithmetic mean roughness in a direction perpendicular to the machine direction (Ra(TD)) satisfies the following formula (1): 1.2?Ra(TD)/Ra(MD)?3.6??(1) (Ra(MD): arithmetic mean roughness [?m] measured in the machine direction of film, and Ra(TD): arithmetic mean roughness [?m] measured in the direction perpendicular to the machine direction of film).

Abstract: Provided is a polyethylene film that is more excellent in blocking in unwinding the film in the film roll state, and more excellent in blocking between sealants after lamination with a base material, and also having transparency and excellent heat sealing property even at low temperatures. A polyethylene film wherein in at least either face, a ratio between an arithmetic mean inclination angle in a machine direction of film (R?a (MD) [°]), and an arithmetic mean inclination angle in a direction perpendicular to the machine direction (R?a (TD) [°]) satisfies the following formula (1): 1.2?R?a(TD)/R?a(MD)?3.6??(1) (R?a (MD): arithmetic mean inclination angle measured in the machine direction of film, and R?a (TD): arithmetic mean inclination angle measured in the direction perpendicular to the machine direction of film).

Abstract: Provided is a polyethylene film showing more excellent blocking resistance in unwinding from the film roll state and more excellent blocking resistance between sealants after lamination with a base material, and having transparency and excellent heat sealing property even at low temperatures. A polyethylene film wherein in at least either face, a ratio between an arithmetic mean roughness in a machine direction of film (Ra(MD)), and an arithmetic mean roughness in a direction perpendicular to the machine direction (Ra(TD)) satisfies the following formula (1): 1.2?Ra(TD)/Ra(MD)?3.6??(1) (Ra(MD): arithmetic mean roughness [?m] measured in the machine direction of film, and Ra(TD): arithmetic mean roughness [?m] measured in the direction perpendicular to the machine direction of film).

Abstract: Provided is a polyethylene film that is more excellent in blocking in unwinding the film in the film roll state, and more excellent in blocking between sealants after lamination with a base material, and also having transparency and excellent heat sealing property even at low temperatures. A polyethylene film wherein in at least either face, a ratio between an arithmetic mean inclination angle in a machine direction of film (R?a (MD) [°]), and an arithmetic mean inclination angle in a direction perpendicular to the machine direction (R?a (TD) [°]) satisfies the following formula (1): 1.2?R?a (TD)/R?a (MD)?3.6??(1) (R?a (MD): arithmetic mean inclination angle measured in the machine direction of film, and R?a (TD): arithmetic mean inclination angle measured in the direction perpendicular to the machine direction of film).