Abstract: There is provided a polyethylene film and a laminate which can be used to produce a package having high heat resistance, strength and recycling suitability, as an alternative to laminated films conventionally used for a package. The polyethylene film according to the present invention is irradiated with an electron beam on its only one side, wherein crosslink densities in the polyethylene are different between the side irradiated with an electron beam and the other side not irradiated with an electron beam.

Abstract: Provided is a cover material for packaging contains for retort sterilization which comes to exhibit excellent sealing strength through low-temperature, short-time heat sealing. The cover material for packaging containers for retort sterilization is constituted of a multilayered laminate obtained by superposing a base layer, an interlayer, and a sealing layer in this order, and is characterized in that the base layer is constituted of a laminated film obtained by laminating a polyethylene terephthalate film or polybutylene terephthalate film to an aluminum foil and the aluminum foil of the base layer has been laminated to the interlayer with a polyurethane-based adhesive or a polyester-based adhesive, and that the aluminum foil has a thickness of 7-40 ?m, the polyethylene terephthalate film or the polybutylene terephthalate film has a thickness of 6-18 ?m, the interlayer has a thickness of 10-100 ?m, and the sealing layer has a thickness of 3-20 ?m.

Abstract: Provided is a cover material for packaging contains for retort sterilization which comes to exhibit excellent sealing strength through low-temperature, short-time heat sealing. The cover material for packaging containers for retort sterilization is constituted of a multilayered laminate obtained by superposing a base layer, an interlayer, and a sealing layer in this order, and is characterized in that the base layer is constituted of a laminated film obtained by laminating a polyethylene terephthalate film or polybutylene terephthalate film to an aluminum foil and the aluminum foil of the base layer has been laminated to the interlayer with a polyurethane-based adhesive or a polyester-based adhesive, and that the aluminum foil has a thickness of 7-40 ?m, the polyethylene terephthalate film or the polybutylene terephthalate film has a thickness of 6-18 ?m, the interlayer has a thickness of 10-100 ?m, and the sealing layer has a thickness of 3-20 ?m.

Abstract: There is provided an easily opened multilayer laminated package suitable for the field of flexible packaging, which has easy cuttability, heat resistance, high seal strength and drop impact resistance. A package to be used as a multilayer package, comprising a multilayer laminate body composed of a base layer and a sealant layer, wherein the value of the tear strength measured according to JIS K7128-2, when substituted into the formula (TD value)/(MD value), is such that (TD value)/(MD value)=1.5 or greater, and the value of the tear strength of the film used in the sealant layer is such that (TD value)/(MD value)=3 or greater.

Abstract: There is provided a multilayer laminate film with easy unsealability, heat resistance and easy cuttability, having a seal layer (A) and a base material layer (B), the multilayer laminate film containing the seal layer (A) and the base material layer (B) composed of a mixture of 10-50 parts by weight of high-density polyethylene and 50-90 parts by weight of polypropylene, laminated on the seal layer (A) in one layer or two or more layers, wherein the base material layer (B) is composed of one member selected from the group consisting of (a) an ethylene/butene copolymer with a density of 0.93 g/cm3-0.94 g/cm3, polymerized using a multisite catalyst, (b) high-density polyethylene with a density of 0.945 g/cm3-0.965 g/cm3 and (c) an ethylene/propylene block or random copolymer, further wherein the layer thickness of the seal layer (A) is 1 ?m-20 ?m while the layer thickness of the base material layer (B) is 20 ?m-100 ?m, as well as a packaging container and packaging bag employing it as a lid material.

Abstract: There is provided an easily opened multilayer laminated package suitable for the field of flexible packaging, which has easy cuttability, heat resistance, high seal strength and drop impact resistance. A package to be used as a multilayer package, comprising a multilayer laminate body composed of a base layer and a sealant layer, wherein the value of the tear strength measured according to JIS K7128-2, when substituted into the formula (TD value)/(MD value), is such that (TD value)/(MD value)=1.5 or greater, and the value of the tear strength of the film used in the sealant layer is such that (TD value)/(MD value)=3 or greater.

Abstract: There is provided a multilayer laminate film with easy unsealability, heat resistance and easy cuttability, having a seal layer (A) and a base material layer (B), the multilayer laminate film containing the seal layer (A) and the base material layer (B) composed of a mixture of 10-50 parts by weight of high-density polyethylene and 50-90 parts by weight of polypropylene, laminated on the seal layer (A) in one layer or two or more layers, wherein the base material layer (B) is composed of one member selected from the group consisting of (a) an ethylene/butene copolymer with density of 0.93 g/cm3-0.94 g/cm3, polymerized using multisite catalyst, (b) high-density polyethylene with a density of 0.945 g/cm3-0.965 g/cm3 and (c) an ethylene/propylene block or random copolymer, further wherein the layer thickness of the seal layer (A) is 1 ?m-20 ?m while the layer thickness of the base material layer (B) is 20 ?m-100 ?m, as well as a packaging container and packaging bag employing it as a lid material.