Molded article and package

Abstract

To provide a molded article in which an adherend and a resin layer are relatively hardly peeled in the presence of moisture, and to provide a package using the molded article.SOLUTION: The molded article according to the present invention includes an adherend and a layer A laminated on the adherend, wherein the layer A contains a polyolefin-based resin and a phosphorus-based antioxidant, the content of the phosphorus-based antioxidant is 0.01 parts by mass or more and 1 part by mass or less with respect to 100 parts by mass of the polyolefin-based resin, and the number of atoms (excluding hydrogen atoms) present at less than 4.6 Å from a phosphorus atom in the phosphorus-based antioxidant is 16 or more.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a molded article and a package. [Background technology]

[0002] Conventionally, molded articles such as aluminum laminate materials in which a resin layer such as a polyolefin resin is laminated on an adherend such as aluminum foil have excellent durability, light-shielding properties, heat insulation properties, etc., and are also lightweight, and therefore have been used, for example, as packaging bags for food, daily necessities, etc.; housings for secondary batteries such as lithium-ion batteries and nickel-metal hydride batteries; and parts for automobiles, etc.

[0003] For example, Patent Document 1 discloses an aluminum laminate material that is attached to the outer surface of a polypropylene container by integral molding, characterized in that it comprises a layer of polypropylene resin modified with maleic anhydride on both sides of an aluminum foil, and an additional layer of polypropylene resin on the resin layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-343105 Summary of the Invention [Problem to be solved by the invention]

[0005] However, a molded article such as the aluminum laminate material has a problem in that the aluminum foil as the adherend and the polyolefin resin layer tend to peel off in the presence of moisture.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a molded article in which the adherend and the resin layer are relatively difficult to peel off from each other in the presence of moisture, and a packaging article using the molded article. [Means for solving the problem]

[0007] The molded article according to the present invention comprises an adherend and a layer A laminated on the adherend, the layer A contains a polyolefin resin and a phosphorus-based antioxidant, the content of the phosphorus-based antioxidant is 0.01 parts by mass or more and 1 part by mass or less relative to 100 parts by mass of the polyolefin-based resin, The phosphorus-based antioxidant has 16 or more atoms (excluding hydrogen atoms) located within 4.6 Å from the phosphorus atom.

[0008] The package according to the present invention includes a packaging material in which an item to be packaged is packaged, The packaging material is the molded article. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a molded article in which the resin layer is relatively unlikely to peel from an adherend in the presence of moisture, and a package using the molded article. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.

[0011] (Molded body) The molded article according to this embodiment includes an adherend and a layer A laminated on the adherend.

[0012] [Layer A] Layer A contains a polyolefin resin and a phosphorus-based antioxidant.

[0013] <Phosphorus-based antioxidant> Phosphorus-based antioxidants are essential for suppressing thermal decomposition of polyolefin resins during high-temperature processing. However, phosphorus-based antioxidants themselves act as Lewis bases, activating water molecules like hydroxy anions, which has the side effect of promoting the hydrolysis of chemical bonds between the adherend and Layer A, the resin layer. Therefore, the number of atoms (excluding hydrogen atoms) within 4.6 Å of the phosphorus atom of the phosphorus-based antioxidant is 16 or more to suppress the phosphorus-based antioxidant's Lewis base action and prevent peeling between the adherend and the resin layer, even in the presence of moisture. The number of atoms (excluding hydrogen atoms) within 4.6 Å of the phosphorus atom refers to the number of atoms that contribute to steric hindrance around the phosphorus atom in the molecular structure of the phosphorus-based antioxidant, i.e., the degree of steric hindrance around the phosphorus atom. In phosphorus-based antioxidants, the greater the steric hindrance around the phosphorus atom, the weaker the interaction between the phosphorus atom and water molecules, making it less likely for the phosphorus atom to act as a Lewis base for water molecules and less likely to hydrolyze the chemical bond between the adherend and Layer A, the resin layer, and therefore less likely to have an adverse effect on the adhesion between the adherend and the resin layer, even in the presence of moisture.

[0014] The distance between the phosphorus atom and atoms excluding hydrogen atoms can be determined by using the MM2 (Molecular Mechanics program 2) calculation method to calculate the interatomic distance between the phosphorus atom and atoms excluding hydrogen atoms when the energy in the initial structure of the phosphorus-based antioxidant molecule is minimum. Note that the distance between the phosphorus atom and atoms excluding hydrogen atoms means the distance between the atomic nuclei of each atom.

[0015] From the viewpoint of making it difficult to peel the adherend and the resin layer in the presence of moisture, the number of atoms present within 4.6 Å from the phosphorus atom is preferably from 18 to 30, more preferably from 19 to 28, and even more preferably from 20 to 25. The number of atoms present within 4.6 Å from the phosphorus atom can be adjusted by appropriately selecting a phosphorus-based oxidizing agent, which will be described later.

[0016] Examples of atoms located less than 4.6 Å from the phosphorus atom include carbon atoms, oxygen atoms, nitrogen atoms, aluminum atoms, iron atoms, sodium atoms, calcium atoms, boron atoms, etc. Among these, from the viewpoint of making it difficult to peel the resin layer from the adherend in the presence of moisture, the atoms located less than 4.6 Å from the phosphorus atom are preferably at least one selected from the group consisting of carbon atoms, oxygen atoms, nitrogen atoms, aluminum atoms, iron atoms, sodium atoms, calcium atoms, and boron atoms, and more preferably at least one selected from the group consisting of carbon atoms, oxygen atoms, nitrogen atoms, sodium atoms, and calcium atoms.

[0017] Examples of phosphorus-based antioxidants having 16 or more atoms (excluding hydrogen atoms) located within 4.6 Å of the phosphorus atom include 2,2′-methylenebis(4,6-di-tert-butylphenyl)2-ethylhexyl phosphite, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(2,4-di-tert-butylphenyl)phosphite, 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepin, and tetrakis(2,4-di-tert-butylphenyl)[1,1-biphenyl]-4,4′-diylbisphosphonite. Among these, from the viewpoint of making it difficult for the adherend and the resin layer to peel off in the presence of moisture, the phosphorus-based antioxidant is preferably 2,2'-methylenebis(4,6-di-tert-butylphenyl)2-ethylhexyl phosphite, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(2,4-di-tert-butylphenyl)phosphite, 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, and tetrakis(2,4-di-tert-butylphenyl)[1,1-biphenyl]-4,4'-diylbisphosphonite, and more preferably 2,2'-methylenebis(4,6-di-tert-butylphenyl)2-ethylhexyl phosphite, tris(2,4-di-tert-butylphenyl)phosphite, or tetrakis(2,4-di-tert-butylphenyl)[1,1-biphenyl]-4,4'-diylbisphosphonite.In one aspect of the molded article according to the present embodiment, the phosphorus-based antioxidant is at least one selected from the group consisting of 2,2'-methylenebis(4,6-di-tert-butylphenyl)2-ethylhexyl phosphite, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(2,4-di-tert-butylphenyl)phosphite, and 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepine.

[0018] From the viewpoint of making it difficult to peel the resin layer from the adherend in the presence of moisture, the content of the phosphorus-based antioxidant is 0.01 to 1 part by mass, preferably 0.015 to 0.7 parts by mass, more preferably 0.02 to 0.5 parts by mass, even more preferably 0.03 to 0.4 parts by mass, and particularly preferably 0.04 to 0.3 parts by mass, relative to 100 parts by mass of the polyolefin-based resin. When two or more types of phosphorus-based antioxidants are used, the content of the phosphorus-based antioxidants refers to the total amount.

[0019] <Polyolefin resin> The polyolefin resin is a resin containing an olefin polymer.

[0020] Examples of polyolefin resins contained in Layer A include polyethylene resins, polypropylene resins, etc. Among these, the polyolefin resin is preferably a non-polar resin with low moisture absorption, i.e., at least one of a polyethylene resin and a polypropylene resin, from the viewpoint of making it difficult to peel the resin layer from the adherend in the presence of moisture.

[0021] The polypropylene resin is a resin containing a propylene polymer.

[0022] A propylene-based polymer is a polymer containing more than 50% by mass of monomer units derived from propylene. Examples of propylene-based polymers include propylene homopolymers, random copolymers of propylene and monomers other than propylene, and heterophasic propylene polymer materials. A polypropylene-based resin may contain only one type of propylene-based polymer, or may contain two or more types of propylene-based polymers.

[0023] From the viewpoint of improving the rigidity and impact resistance of the molded article, the polypropylene-based resin preferably contains, as a propylene-based polymer, at least one selected from the group consisting of a propylene homopolymer, a random copolymer of propylene and a monomer other than propylene, and a heterophasic propylene polymer material, and more preferably contains a random copolymer of propylene and a monomer other than propylene.

[0024] From the viewpoint of improving the fluidity of the polypropylene resin composition when melted and the toughness of the molded product, the intrinsic viscosity ([η]) of the propylene homopolymer is preferably 0.10 dL / g or more and 4.00 dL / g or less, more preferably 0.50 dL / g or more and 3.50 dL / g or less, even more preferably 0.70 dL / g or more and 3.00 dL / g or less, and particularly preferably 0.90 dL / g or more and 2.97 dL / g or less.

[0025] In this specification, the intrinsic viscosity (unit: dL / g) is a value measured at a temperature of 135°C using tetralin as a solvent by the following method.

[0026] Using an Ubbelohde viscometer, the reduced viscosity is measured at three concentrations: 0.1 g / dL, 0.2 g / dL, and 0.5 g / dL. The reduced viscosity is plotted against the concentration, and the intrinsic viscosity is calculated by extrapolation, extrapolating the concentration to zero. The method for calculating the limiting viscosity using the extrapolation method is described, for example, on page 491 of "Polymer Solutions, Polymer Experiments 11" (published by Kyoritsu Shuppan Co., Ltd. in 1982).

[0027] The propylene homopolymer can be produced, for example, by carrying out a polymerization step in which propylene is polymerized using a polymerization catalyst.

[0028] Examples of the polymerization catalyst include Ziegler catalysts; Ziegler-Natta catalysts; catalysts containing a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring and an alkylaluminoxane; catalysts containing a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that reacts with the transition metal compound to form an ionic complex, and an organoaluminum compound; and modified catalysts in which a catalyst component (a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that forms an ionic complex, an organoaluminum compound, etc.) is supported on inorganic particles (silica, clay minerals, etc.).

[0029] Examples of the polymerization catalyst include catalysts described in JP-A-61-218606, JP-A-5-194685, JP-A-7-216017, JP-A-9-316147, JP-A-10-212319, JP-A-2004-182981, JP-A-2010-168545, and JP-A-2011-246699.

[0030] Furthermore, a polymer obtained by prepolymerizing propylene in the presence of the above polymerization catalyst can also be used as the polymerization catalyst.

[0031] Examples of polymerization methods include bulk polymerization, solution polymerization, and gas phase polymerization. Here, bulk polymerization refers to a method in which polymerization is carried out using an olefin that is liquid at the polymerization temperature as a medium. Solution polymerization refers to a method in which polymerization is carried out in an inert hydrocarbon solvent such as propane, butane, isobutane, pentane, hexane, heptane, or octane. Gas phase polymerization refers to a method in which gaseous monomers are used as a medium and the gaseous monomers are polymerized in the medium.

[0032] The polymerization method may be, for example, a batch method, a continuous method, or a combination thereof. The polymerization method may be a multi-stage method in which a plurality of polymerization reactors are connected in series.

[0033] From the viewpoint of industrial and economical excellence, the polymerization method is preferably a continuous gas phase polymerization method or a bulk-gas phase polymerization method in which bulk polymerization and gas phase polymerization are carried out continuously.

[0034] Various conditions in the polymerization step (polymerization conditions such as polymerization temperature, polymerization pressure, monomer concentration, catalyst input amount, and polymerization time) may be appropriately determined depending on the molecular structure of the target polymer.

[0035] In the method for producing a propylene homopolymer, other steps may be carried out before or after the polymerization step. For example, after the polymerization step, the polymer may be dried at a temperature equal to or lower than the melting point of the polymer, as necessary, to remove residual solvent contained in the polymer and ultralow molecular weight oligomers produced as by-products during the production. Examples of drying methods include those described in JP-A-55-75410 and JP-A-2565753.

[0036] The random copolymer of propylene and a monomer other than propylene contains monomer units derived from propylene and monomer units derived from a monomer other than propylene. In the random copolymer, the content of the monomer units derived from a monomer other than propylene is preferably 0.01% by mass or more and 30% by mass or less, more preferably 0.1% by mass or more and 20% by mass or less, relative to the total mass of the copolymer (100% by mass).

[0037] Examples of monomers other than propylene include ethylene and α-olefins having 4 to 12 carbon atoms. In this specification, α-olefins are aliphatic unsaturated hydrocarbons having a carbon-carbon unsaturated double bond at the α-position. Examples of α-olefins having 4 to 12 carbon atoms include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-dodecene, 4-methyl-1-pentene, and 4-methyl-1-hexene.

[0038] The monomer other than propylene is preferably at least one selected from the group consisting of ethylene and α-olefins having 4 to 10 carbon atoms, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0039] Examples of random copolymers of propylene and a monomer other than propylene include propylene-ethylene random copolymers, propylene-1-butene random copolymers, propylene-1-hexene random copolymers, propylene-1-octene random copolymers, propylene-ethylene-1-butene random copolymers, propylene-ethylene-1-hexene random copolymers, and propylene-ethylene-1-octene random copolymers.

[0040] A random copolymer of propylene and a monomer other than propylene can be produced, for example, by polymerizing propylene and a monomer other than propylene in accordance with the polymerization catalyst, polymerization method, polymerization system, and polymerization conditions that can be used in the production of the above-mentioned propylene homopolymer.

[0041] The heterophasic propylene polymer material is a mixture containing a polymer I containing monomer units derived from propylene, and a polymer II containing monomer units derived from at least one α-olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms and monomer units derived from propylene.

[0042] The heterophasic propylene polymer material can be produced, for example, by carrying out a first polymerization step of polymerizing polymer I and a second polymerization step of polymerizing polymer II. These polymerization steps can be carried out using the same polymerization catalyst, polymerization method, polymerization system, and polymerization conditions as those usable in the production of the above-mentioned propylene homopolymer.

[0043] The heterophasic propylene polymer material may be such that the sum of polymer I and polymer II contained in the heterophasic propylene polymer material is 100% by mass relative to the total mass of the heterophasic propylene polymer material (100% by mass).

[0044] Polymer I may contain 70% by mass or more of monomer units derived from propylene (where the total mass of Polymer I is 100% by mass). Polymer I may be, for example, a propylene homopolymer, or may contain monomer units derived from a monomer other than propylene. When Polymer I contains monomer units derived from a monomer other than propylene, the content thereof is usually 0.01% by mass or more and 30% by mass or less, relative to the total mass of Polymer I (100% by mass).

[0045] Examples of the monomer other than propylene include ethylene and α-olefins having 4 or more carbon atoms. Examples of the α-olefins having 4 or more carbon atoms include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-dodecene, 4-methyl-1-pentene, and 4-methyl-1-hexene.

[0046] The monomer other than propylene is preferably at least one selected from the group consisting of ethylene and α-olefins having 4 to 10 carbon atoms, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0047] Examples of polymer I containing monomer units derived from a monomer other than propylene include propylene-ethylene copolymer, propylene-1-butene copolymer, propylene-1-hexene copolymer, propylene-1-octene copolymer, propylene-ethylene-1-butene copolymer, propylene-ethylene-1-hexene copolymer, and propylene-ethylene-1-octene copolymer.

[0048] Polymer I is preferably a propylene homopolymer, a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-1-hexene copolymer, and more preferably a propylene homopolymer.

[0049] The content of polymer I is usually 30% by mass or more and 99% by mass or less, preferably 50% by mass or more and 95% by mass or less, and more preferably 60% by mass or more and 90% by mass or less, based on the total mass of the heterophasic propylene polymerization material (100% by mass).

[0050] As described above, polymer II contains monomer units derived from at least one α-olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms, and monomer units derived from propylene. Examples of α-olefins having 4 to 12 carbon atoms include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-dodecene, 4-methyl-1-pentene, and 4-methyl-1-hexene.

[0051] Polymer II preferably contains 30% by mass or more of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms, and also contains monomer units derived from propylene (where the total mass of Polymer II is taken as 100% by mass).

[0052] In polymer II, the content of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms is usually 1% by mass or more and 80% by mass or less, preferably 20% by mass or more and 70% by mass or less, and more preferably 30% by mass or more and 60% by mass or less (where the total mass of polymer II is taken as 100% by mass).

[0053] In Polymer II, the at least one α-olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms is preferably at least one selected from the group consisting of ethylene and α-olefins having 4 to 10 carbon atoms, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, 1-octene, and 1-decene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0054] Examples of polymer II include propylene-ethylene copolymer, propylene-ethylene-1-butene copolymer, propylene-ethylene-1-hexene copolymer, propylene-ethylene-1-octene copolymer, propylene-ethylene-1-decene copolymer, propylene-1-butene copolymer, propylene-1-hexene copolymer, propylene-1-octene copolymer, propylene-1-decene copolymer, etc. Among these, polymer II is preferably a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, and more preferably a propylene-ethylene copolymer.

[0055] The content of polymer II is usually 1% by mass or more and 70% by mass or less, preferably 5% by mass or more and 50% by mass or less, and more preferably 10% by mass or more and 40% by mass or less, relative to the total mass of the heterophasic propylene polymerization material (100% by mass).

[0056] Examples of heterophasic propylene polymer materials include (propylene)-(propylene-ethylene) polymer materials, (propylene)-(propylene-ethylene-1-butene) polymer materials, (propylene)-(propylene-ethylene-1-hexene) polymer materials, (propylene)-(propylene-ethylene-1-octene) polymer materials, (propylene)-(propylene-1-butene) polymer materials, (propylene)-(propylene-1-hexene) polymer materials, (propylene)-(propylene-1-octene) polymer materials, and (propylene)-(propylene-1-decene) polymer materials. materials, (propylene-ethylene)-(propylene-ethylene) polymerization materials, (propylene-ethylene)-(propylene-ethylene-1-butene) polymerization materials, (propylene-ethylene)-(propylene-ethylene-1-hexene) polymerization materials, (propylene-ethylene)-(propylene-ethylene-1-octene) polymerization materials, (propylene-ethylene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-ethylene)-(propylene-1-butene) polymerization materials, (propylene-ethylene)-(propylene-1-hexene) polymerization materials, (propylene-ethylene) (propylene)-(propylene-1-octene) polymerization materials, (propylene-ethylene)-(propylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-butene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-hexene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-octene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-( (propylene-1-butene) polymerization materials, (propylene-1-butene)-(propylene-1-hexene) polymerization materials, (propylene-1-butene)-(propylene-1-octene) polymerization materials, (propylene-1-butene)-(propylene-1-decene) polymerization materials, (propylene-1-hexene)-(propylene-1-hexene) polymerization materials, (propylene-1-hexene)-(propylene-1-octene) polymerization materials, (propylene-1-hexene)-(propylene-1-decene) polymerization materials, (propylene-1-octene)-(propylene-1-octene) polymerization materials,(propylene-1-octene)-(propylene-1-decene) polymer materials, etc.

[0057] Here, the expression "(propylene)-(propylene-ethylene) polymer material" means "a heterophasic propylene polymer material in which polymer I is a propylene homopolymer and polymer II is a propylene-ethylene copolymer." The same applies to other similar expressions.

[0058] The heterophasic propylene polymeric material is preferably a (propylene)-(propylene-ethylene) polymeric material, a (propylene)-(propylene-ethylene-1-butene) polymeric material, a (propylene-ethylene)-(propylene-ethylene) polymeric material, a (propylene-ethylene)-(propylene-ethylene-1-butene) polymeric material, or a (propylene-1-butene)-(propylene-1-butene) polymeric material, and more preferably a (propylene)-(propylene-ethylene) polymeric material.

[0059] The intrinsic viscosity number ([η]I) of polymer I is preferably 0.10 dL / g or more and 4.00 dL / g or less, more preferably 0.50 dL / g or more and 3.00 dL / g or less, and even more preferably 0.70 dL / g or more and 2.00 dL / g or less.

[0060] The intrinsic viscosity number ([η]II) of polymer II is preferably 1.00 dL / g or more and 10.00 dL / g or less, more preferably 2.00 dL / g or more and 10.00 dL / g or less, and even more preferably 2.00 dL / g or more and 9.00 dL / g or less.

[0061] The ratio ([η]II / [η]I) of the intrinsic viscosity number ([η]II) of polymer II to the intrinsic viscosity number ([η]I) of polymer I is preferably 1 or more and 20 or less, more preferably 1 or more and 10 or less.

[0062] The intrinsic viscosity number ([η]I) of polymer I can be measured, for example, by extracting polymer I from a reactor in which polymer I is polymerized and measuring the intrinsic viscosity number of the polymer.

[0063] The intrinsic viscosity number ([η]II) of polymer II can be calculated, for example, by the following formula (i) using the intrinsic viscosity number ([η]Total) of the heterophasic propylene polymerization material, the intrinsic viscosity number ([η]I) of polymer I, and the contents of polymer II and polymer I.

[0064] [η]II=([η]Total-[η]I×XI) / XII ···(i) [η]Total: Intrinsic viscosity of heterophasic propylene polymer material (dL / g) [η]I: Intrinsic viscosity number of polymer I (dL / g) XI: Ratio of the mass of polymer I to the total mass of the heterophasic propylene polymer material (mass of polymer I / mass of heterophasic propylene polymer material) XII: Ratio of the mass of polymer II to the total mass of heterophasic propylene polymer material (mass of polymer II / mass of heterophasic propylene polymer material)

[0065] Here, XI and XII can be determined from the material balance during polymerization.

[0066] XII may be calculated using the following formula by measuring the heat of fusion of polymer I and the heat of fusion of the heterophasic propylene polymer material. XII=1-(ΔHf)T / (ΔHf)P (ΔHf)T: Heat of fusion of heterophasic propylene polymer material (J / g) (ΔHf)P: Heat of fusion of polymer I (J / g)

[0067] In order to improve the molding processability of the polypropylene resin composition, the melt flow rate (MFR) of the propylene polymer is generally preferably 0.1 g / 10 min or more and 300 g / 10 min or less, and more preferably 0.2 g / 10 min or more and 200 g / 10 min or less.

[0068] It is desirable that the molecular weight of the propylene polymer be precisely controlled, particularly in the presence of moisture, from the viewpoint of achieving both crack resistance, creep resistance, and easy moldability of the resin. Therefore, when the molded article according to this embodiment is used in the presence of moisture, the melt flow rate (MFR) of the propylene polymer is preferably 0.2 g / 10 min or more and 50 g / 10 min or less, more preferably 0.3 g / 10 min or more and 30 g / 10 min or less, even more preferably 0.4 g / 10 min or more and 20 g / 10 min or less, and particularly preferably 1 g / 10 min or more and 15 g / 10 min or less.

[0069] The melt flow rate (MFR) of a propylene polymer is measured by Method A under conditions of a temperature of 230°C and a load of 2.16 kg in accordance with the method specified in JIS K7210-1:2014 and K7210-2:2014.

[0070] The polyethylene resin is a resin containing an ethylene polymer.

[0071] An ethylene-based polymer is a polymer containing more than 50% by mass of monomer units derived from ethylene. Examples of ethylene-based polymers include ethylene homopolymers, copolymers of ethylene and α-olefins, and copolymers of ethylene and α-olefins substituted with alicyclic compounds. The ethylene-based polymer may also be a mixture of an ethylene homopolymer and a copolymer of ethylene and α-olefins. The amount of monomer units derived from α-olefins in the ethylene-based polymer is not particularly limited and may be, for example, 4.0% by mass or more and 20% by mass or less.

[0072] Examples of ethylene homopolymers include high-pressure low-density polyethylene (LDPE), which is produced by high-pressure radical polymerization using a radical initiator. High-pressure low-density polyethylene (LDPE) is a polymer in which repeating ethylene units are randomly bonded to form a branched structure. High-pressure low-density polyethylene (LDPE) has a density of, for example, 910 to 935 kg / m 3 may be.

[0073] Examples of copolymers of ethylene and α-olefins include linear low-density polyethylene having crystallinity, and elastomers of copolymers of ethylene and α-olefins having low crystallinity and rubber-like elastic properties.

[0074] The density of the linear low-density polyethylene is, for example, 900 to 940 kg / m 3 The density of the elastomer of the copolymer of ethylene and α-olefin may be, for example, 860 to 900 kg / m 3 may be.

[0075] Examples of the α-olefin include α-olefins having 3 to 10 carbon atoms. Examples of the α-olefins having 3 to 10 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, and 3-methyl-1-butene. Preferred are α-olefins having 4 to 10 carbon atoms, and more preferred are 1-butene, 1-hexene, and 1-octene.

[0076] Examples of copolymers of ethylene and α-olefins include ethylene-1-butene copolymers, ethylene-1-hexene copolymers, ethylene-1-octene copolymers, ethylene-1-decene copolymers, ethylene-(3-methyl-1-butene) copolymers, etc. The copolymer of ethylene and α-olefins may be one of these copolymers alone or a mixture of two or more thereof.

[0077] Examples of α-olefins substituted with alicyclic compounds include vinylcyclohexane.

[0078] The melt flow rate (MFR) of the ethylene polymer is preferably 0.5 g / 10 min or more and 50 g / 10 min or less, more preferably 1 g / 10 min or more and 30 g / 10 min or less, and even more preferably 1 g / 10 min or more and 20 g / 10 min or less.

[0079] The melt flow rate (MFR) of an ethylene polymer is measured by Method A under conditions of a temperature of 190°C and a load of 2.16 kg in accordance with the method specified in JIS K7210-1:2014 and K7210-2:2014.

[0080] The ethylene polymer can be produced by a known polymerization method using a known polymerization catalyst.

[0081] Examples of polymerization catalysts include homogeneous catalyst systems such as metallocene catalysts, Ziegler catalyst systems, and Ziegler-Natta catalyst systems. Examples of homogeneous catalyst systems include a catalyst system consisting of a Group 4 transition metal compound having a cyclopentadienyl ring and an alkylaluminoxane, a catalyst system consisting of a Group 4 transition metal compound having a cyclopentadienyl ring, a compound that reacts with the metal compound to form an ionic complex, and an organoaluminum compound, a catalyst system in which inorganic particles such as silica or clay minerals are supported and modified with catalytic components such as a Group 4 transition metal compound having a cyclopentadienyl ring, a compound that forms an ionic complex, and an organoaluminum compound, and a prepolymerization catalyst system prepared by prepolymerizing ethylene, α-olefins, or the like in the presence of the above catalyst systems.

[0082] Furthermore, a radical initiator can be used as a polymerization catalyst for high-pressure low-density polyethylene (LDPE).

[0083] <Other resins> In particular, from the viewpoint of increasing strength, dimensional stability, and high adhesiveness, Layer A may contain, in addition to the above-mentioned polyolefin resins, resins such as polycarbonate, styrene-butadiene-styrene copolymer (SBS), polyphenylene ether, polyamide, etc.

[0084] <Other additives> Layer A may contain other additives as needed. Examples of other additives include pigments, dyes, inorganic fillers, neutralizing agents, antioxidants (excluding the above-mentioned phosphorus-based antioxidants), lubricants, copper inhibitors, antifogging agents, antistatic agents, processing stabilizers, ultraviolet absorbers, light stabilizers, nucleating agents, clarifying nucleating agents, processing aids, metal soaps, foaming agents, antibacterial agents, plasticizers, flame retardants, flame retardant aids, crosslinking agents for polyolefins, crosslinking aids for polyolefins, brightness enhancers, flowability modifiers, and crystallization retarders.

[0085] [Adherend] Examples of the adherend include metals, glass, ceramics, carbon fibers, glass fibers, plant-derived fibers such as cellulose nanofibers and cellulose fibers, and resins such as phenolic resins, epoxy resins, polyurethanes, melamine resins, unsaturated polyesters, polyesters, polyamide resins, acrylic resins, polymethacrylic resins, polyphenylene ethers, polyolefin resins, ABS, polyvinyl chloride, polyacetal, polycarbonate, polybutylene terephthalate, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polystyrene, styrene-butadiene-styrene copolymer (SBS), SEBS, polybutadiene, PTFE, silicone rubber, EPDM, and TPE. Among these, from the viewpoint of improving durability, light-blocking properties, heat insulation, or gas barrier properties, the adherend is preferably metal; glass; ceramic; carbon fiber; glass fiber; plant-derived fibers such as cellulose nanofiber and cellulose fiber; or resins such as phenolic resin, epoxy resin, polyurethane, melamine resin, unsaturated polyester, polyester, polyamide resin, acrylic resin, polymethacrylic resin, polyphenylene ether, polyolefin resin, ABS, polyvinyl chloride, polyacetal, polycarbonate, polybutylene terephthalate, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polystyrene, styrene-butadiene-styrene copolymer (SBS), SEBS, polybutadiene, EPDM, and TPE, and more preferably metal. In order to increase the adhesive strength between the adherend and Layer A, the surface of the adherend may be subjected to a chemical modification treatment to add, for example, carboxylic acid, carboxylic anhydride, hydroxyl group, carbonyl group, ester group, amino group, or the like. The adherend may be a compound of two or more materials selected arbitrarily, or may contain a filler such as talc mineral, for the purpose of improving the strength of the adherend, imparting functionality, etc. The adherend may be selected arbitrarily so as to maintain hydrolysis resistance of the chemical bond present between the adherend and Layer A.

[0086] The chemical bond between the adherend and Layer A is not limited by its bonding type, but may be mediated by, for example, an ester bond, an amide bond (or a peptide bond), an ionic bond, a urethane bond, an ether bond, a hydrogen bond, or van der Waals forces. It is believed that most of the chemical bonds exist as ester bonds or hydrogen bonds. Therefore, the chemical bonds are particularly effective in imparting hydrolysis resistance to the molded article according to this embodiment.

[0087] Examples of metals include aluminum, iron, stainless steel, copper, magnesium, titanium, zirconium, gallium, chromium, vanadium, nickel, cobalt, tungsten, molybdenum, silver, gold, palladium, ruthenium, rhodium, iridium, manganese, rhenium, platinum, zinc, lithium, sodium, potassium, and barium. Among these, from the viewpoint of improving durability, light-shielding properties, or heat insulation properties, or reducing costs, the metal is preferably at least one selected from the group consisting of aluminum, iron, stainless steel, copper, magnesium, and titanium, and more preferably at least one of aluminum and iron. The metal may be in the form of a simple metal, a metal oxide, or an alloy combining two or more of these.

[0088] Examples of the form of such an adherend include aluminum foil, SUS steel plate, copper plate, metal fiber, and vapor-deposited products.

[0089] In one aspect of the molded article according to this embodiment, the surface of the layer A that is to be laminated with the adherend is subjected to a corona discharge treatment.

[0090] The corona discharge treatment may be carried out, for example, so that the wet tension of the laminated surface is 35 mN / m or more and 60 mN / m or less. The wet tension can be measured in accordance with JIS K 6768-1999.

[0091] The molded article according to one aspect of the present embodiment can be produced, for example, by subjecting the surface of a film that contains the polyolefin resin and the phosphorus-based antioxidant and that forms Layer A to a corona discharge treatment using a known method so that the wet tension falls within the above-mentioned range, and then heat-laminating the film to an adherend so that the corona-discharged surface of the film faces the surface of the adherend.

[0092] In another aspect of the molded article according to this embodiment, a modified polyolefin resin is interposed between Layer A and the adherend.

[0093] The modified polyolefin resin may be interposed between Layer A and the adherend by forming a layer containing the modified polyolefin resin between them, for example.

[0094] <Modified polyolefin resin> The modified polyolefin resin is a resin containing a modified polyolefin polymer.

[0095] Examples of modified polyolefin resins include modified polyethylene resins, modified polypropylene resins, etc. Among these, the modified polyolefin resin is preferably at least one of modified polyethylene resins and modified polypropylene resins, from the viewpoint of making it difficult to peel the resin layer from the adherend in the presence of moisture.

[0096] Examples of modified polyolefin polymers include acid-modified polyolefin polymers, hydroxyl-modified polyolefin polymers, epoxy-modified polyolefin polymers, carbodiimide-modified polyolefin polymers, amine-modified polyolefin polymers, acrylic-modified polyolefin polymers, and polyoxyethylene-modified polyolefin polymers. Among these, from the viewpoint of making it difficult to peel the resin layer from the adherend in the presence of moisture, the modified polyolefin polymer is preferably at least one selected from the group consisting of acid-modified polyolefin polymers, hydroxyl-modified polyolefin polymers, epoxy-modified polyolefin polymers, carbodiimide-modified polyolefin polymers, amine-modified polyolefin polymers, and acrylic-modified polyolefin polymers, and more preferably an acid-modified polyolefin polymer. The modified polyolefin resin may contain only one type of modified polyolefin polymer, or may contain two or more types of modified polyolefin polymers.

[0097] The acid-modified polyolefin polymer is shown in the following (1) or (2), that is, it has a monomer unit (modifying group) derived from at least one of an unsaturated carboxylic acid and a derivative thereof. (1) A homopolymer of an olefin, a random copolymer of at least two kinds of olefins, or a heterophasic olefin polymer material obtained by homopolymerizing an olefin and then copolymerizing at least two kinds of olefins, which is subjected to a graft reaction or terminal reaction with at least one of an unsaturated carboxylic acid and its derivatives. (2) A copolymer of at least one olefin and at least one of an unsaturated carboxylic acid and its derivatives.

[0098] The olefin in (1) and (2) above may be the same as or different from the olefin constituting the olefin polymer in the polyolefin resin.

[0099] Examples of unsaturated carboxylic acids include maleic acid, fumaric acid, itaconic acid, acrylic acid, and methacrylic acid. Derivatives of unsaturated carboxylic acids include unsaturated carboxylic acid anhydrides such as maleic anhydride and itaconic anhydride; unsaturated carboxylic acid esters such as methyl acrylate, ethyl acrylate, butyl acrylate, glycidyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, glycidyl methacrylate, monoethyl maleate, diethyl maleate, monomethyl fumarate, and dimethyl fumarate; unsaturated carboxylic acid amides such as acrylamide, methacrylamide, monoamide maleate, diamide maleate, and monoamide fumarate; unsaturated carboxylic acid imides such as maleimide and N-butylmaleimide; and unsaturated carboxylic acid metal salts such as sodium methacrylate. The unsaturated carboxylic acid may be produced by dehydrating citric acid, malic acid, or the like in the step of grafting to a polyolefin. At least one of the unsaturated carboxylic acid and its derivative is preferably maleic anhydride, glycidyl acrylate, or glycidyl methacrylate.

[0100] One embodiment of the acid-modified polyolefin polymer is shown in the following (1') or (2'). (1') An olefin polymer containing 70% by mass or more, preferably 80% by mass or more, of monomer units derived from at least one olefin selected from ethylene and propylene, which has been subjected to a graft reaction or terminal reaction with maleic anhydride. (2') A copolymer of at least one olefin selected from ethylene and propylene with glycidyl methacrylate or maleic anhydride.

[0101] Examples of acid-modified polyolefin polymers include maleic anhydride-modified polypropylene, maleic anhydride-modified polyethylene, maleic acid-modified polypropylene, itaconic acid-modified polypropylene, methacrylic acid-modified polypropylene, glycidyl acrylate-modified polypropylene, glycidyl methacrylate-modified polypropylene, etc. Among these, the acid-modified polyolefin polymer is preferably maleic anhydride-modified polypropylene, maleic anhydride-modified polyethylene, maleic acid-modified polypropylene, itaconic acid-modified polypropylene, glycidyl acrylate-modified polypropylene, or glycidyl methacrylate-modified polypropylene, more preferably maleic anhydride-modified polypropylene, maleic anhydride-modified polyethylene, maleic acid-modified polypropylene, glycidyl acrylate-modified polypropylene, or glycidyl methacrylate-modified polypropylene.

[0102] The modified polyolefin resin may have a modifying group content of, for example, 0.01% by mass or more and 10% by mass or less, 0.1% by mass or more and 6% by mass or less, or 1% by mass or more and 5% by mass or less. When the modified polyolefin resin contains a modified polyolefin polymer obtained by a graft reaction or a terminal reaction, the modified group content of the modified polyolefin resin may be 0.01% by mass or more and 10% by mass or less. When the modified polyolefin resin contains a modified polyolefin polymer obtained by copolymerization, the modified group content of the modified olefin resin may be 0.01% by mass or more and 10% by mass or less.

[0103] Examples of methods that can be used for producing modified polyolefin polymers include those exemplified in "Practical Polymer Alloy Design" (Ide Fumio, Kogyo Chosakai (1996)), Prog. Polym. Sci., 24, 81-142 (1999), JP 2002-308947 A, and JP 3906641 A. Furthermore, methods for producing modified polyolefin polymers may include, for example, a solution method, a bulk method, a melt-kneading method, and the like. Furthermore, these methods may be combined to produce modified polyolefin polymers.

[0104] The modified polyolefin polymer may be a commercially available product. Examples of commercially available modified polyolefin polymers include UMEX (registered trademark) manufactured by Sanyo Chemical Industries, Ltd., TOYOTAC (registered trademark) manufactured by Toyobo Co., Ltd., TAFUMER M (registered trademark) manufactured by Mitsui Chemicals, Inc., ADMER (registered trademark) manufactured by Mitsui Chemicals, Inc., MODIC (registered trademark) manufactured by Mitsubishi Chemical Corporation, ARROWBASE (registered trademark) manufactured by Unitika Ltd., SUMIFIT (registered trademark) manufactured by Sumitomo Chemical Co., Ltd., and BONDFAST (registered trademark) manufactured by Sumitomo Chemical Co., Ltd.

[0105] A molded article according to another aspect of the present embodiment can be produced, for example, by laminating a layer containing the modified polyolefin resin on the surface of an adherend, and then laminating a layer A containing the polyolefin resin and the phosphorus-based antioxidant on the layer containing the modified polyolefin resin.

[0106] In addition, the molded article according to this embodiment may have multiple layers laminated between Layer A and the adherend, or may have multiple layers laminated on the surface of Layer A opposite to the surface laminated with the adherend.

[0107] The molded article according to this embodiment is used in the presence of moisture, and in the presence of moisture, the resin layer of the molded article is unlikely to peel from the adherend.

[0108] In one embodiment, the molded article according to the present embodiment is in a state in which a fluid containing water is contained in the molded article in the presence of water.

[0109] Examples of fluids containing water include water, aqueous solutions, aqueous suspensions, etc. Examples of such fluids containing water include beverages such as soft drinks and alcohol, liquid foods such as curry, stew, pasta sauce, mapo tofu base, soup, and seasonings, electrolytes used in batteries, radiator coolants, cleaning fluids, medical drugs, chemicals, sprayed pesticides, etc. In another aspect, the molded article according to this embodiment, in the presence of water, contains a fluid containing water, and the fluid containing water is an electrolyte used in a battery.

[0110] In still another embodiment, the molded article according to this embodiment is in the presence of moisture under high temperature and humidity conditions of 40° C. or higher and 70% Rh or higher.

[0111] The molded article according to the present embodiment is desired to be able to withstand a more severe use environment, and the use environment in the presence of moisture is preferably a high temperature and humidity environment of 50°C or higher and 75% Rh or higher, more preferably a high temperature and humidity environment of 60°C or higher and 80% Rh or higher, and even more preferably a high temperature and humidity environment of 70°C or higher and 90% Rh or higher.

[0112] In addition to the above-mentioned embodiments, the presence of moisture may also include a state in which a solid containing moisture, such as a frozen food after heating, chilled meat, or chilled fish, is contained.

[0113] The molded article according to the present embodiment is used as a packaging material in one aspect, and the molded article can be used to obtain a packaging material in which the adherend and the resin layer are not easily separated in the presence of moisture.

[0114] The form of the packaging material is not particularly limited, and can be any known form such as packaging film; packaging bags such as pillow packaging, three-side seal packaging, four-side seal packaging, gusset packaging, and standing pouches; and housings.

[0115] The molded article according to this embodiment can be used as a packaging material, as well as parts for automobiles, aircraft, ships, space rockets, and the like; parts for home appliances or peripheral electronic materials; and the like.

[0116] (packaging) In the package according to this embodiment, an item to be packaged is packaged in a packaging material, and the packaging material is the above-described molded article.

[0117] In addition to the water-containing fluid in the molded body according to the present embodiment, the packaged items may also include, for example, solid foods, daily necessities, modules for nickel-metal hydride batteries, secondary batteries such as lithium-ion batteries, storage containers, cooking utensils, etc.

[0118] The shape of the packaging material may be the same as that of the molded article according to the present embodiment.

[0119] The package according to the present embodiment can be produced by a known method, such as a method of packaging an item to be packaged in a molded article in the form of a packaging film, or a method of forming a molded article into a case, bag, or the like and housing the item to be packaged in the molded article.

[0120] The molded article and package according to the present embodiment are not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention. In addition, the configurations, methods, etc. of embodiments other than those described above may be arbitrarily adopted and combined, and the configurations, methods, etc. of one embodiment described above may be applied to the configurations, methods, etc. of the other embodiments described above.

[0121] The present invention includes the following aspects. [1] An adhesive tape comprising an adherend and a layer A laminated on the adherend, the layer A contains a polyolefin resin and a phosphorus-based antioxidant, the content of the phosphorus-based antioxidant is 0.01 parts by mass or more and 1 part by mass or less relative to 100 parts by mass of the polyolefin-based resin, The phosphorus-based antioxidant has a number of atoms (excluding hydrogen atoms) present within 4.6 Å from the phosphorus atom of 16 or more. [2] The molded article according to [1], wherein the surface of the layer A that is to be laminated with the adherend is subjected to a corona discharge treatment. [3] The molded article according to [1] or [2], wherein a modified polyolefin resin is interposed between the layer A and the adherend. [4] The molded body according to any one of [1] to [3], wherein the atom located less than 4.6 Å from the phosphorus atom is at least one atom selected from the group consisting of carbon atoms, oxygen atoms, nitrogen atoms, aluminum atoms, iron atoms, sodium atoms, calcium atoms, and boron atoms. [5] The molded article according to any one of [1] to [4], wherein the phosphorus-based antioxidant is at least one selected from the group consisting of 2,2'-methylenebis(4,6-di-tert-butylphenyl)2-ethylhexyl phosphite, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(2,4-di-tert-butylphenyl)phosphite, and 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepine. [6] The molded article according to any one of [1] to [5], wherein the adherend is a metal. [7] The molded body according to [6], wherein the metal is at least one of aluminum and iron. [8] The molded article according to any one of [1] to [7], which is used in the presence of moisture. [9] The molded body according to [8], wherein the state in the presence of moisture is a state in which a fluid containing moisture is contained.

[10] The molded article according to [9], wherein the fluid containing water is an electrolyte solution used in a battery.

[11] The molded article according to any one of [8] to

[10] , wherein the condition in the presence of moisture is a high-temperature and high-humidity condition of 40° C. or higher and 70% Rh or higher.

[12] The molded article according to any one of [1] to

[11] , which is used as a packaging material.

[13] The packaged item is packaged in the packaging material, A packaging body, wherein the packaging material is the molded body according to any one of [1] to

[12] . [Example]

[0122] The present invention will be described in more detail below using examples and comparative examples, but the present invention is not limited to the following examples. The measured values ​​of each item in the examples and comparative examples were measured by the following methods.

[0123] (Method of measuring physical properties) [Melt flow rate (MFR, unit: g / 10 min)] The MFR was measured under the conditions of a temperature of 230°C and a load of 2.16 kg by Method A in accordance with JIS K7210-1:2014 and K7210-2:2014.

[0124] [Limiting viscosity number] The intrinsic viscosity was determined by the "extrapolation method," in which the reduced viscosity was measured at multiple concentrations using an Ubbelohde viscometer, the reduced viscosity was plotted against the concentration, and the concentration was extrapolated to zero. Specifically, the reduced viscosity was measured at three concentrations of 0.10 g / dL, 0.20 g / dL, and 0.50 g / dL using the method described on page 491 of "Polymer Solutions, Polymer Experiments 11" (published by Kyoritsu Shuppan Co., Ltd. in 1982), and the reduced viscosity was plotted against the concentration and the concentration was extrapolated to zero.

[0125] [Distance between atoms other than hydrogen atoms and phosphorus atom] The distance between the atoms other than hydrogen atoms and the phosphorus atom was determined by the following method. Specifically, first, using ChemDraw ver.20 (manufactured by CambridgeSoft), the molecular structures of phosphorus-based antioxidants D-1 to D-5 described later were drawn, and the molecular structures drawn using Chem3D ver.20 (manufactured by CambridgeSoft) were made into three-dimensional diagrams. Next, using the MM2 calculation method, from the three-dimensional molecular structure, without considering the free rotation around the bond axis, the molecular structure with the most stable conformation in terms of energy was obtained, thereby minimizing the energy in the initial structure of the molecular structure. Then, in the molecular structure when the energy was minimized, the interatomic distances between all atoms except hydrogen atoms and one phosphorus atom of interest were calculated, and the number of atoms satisfying less than 4.6 Å was counted. The results are shown in Table 1.

[0126]

Table 1

[0127] [Components used in Examples and Comparative Examples] The components used in Examples and Comparative Examples are shown below.

[0128] (A) Resin <A-1: Propylene homopolymer> Using the catalyst described in JP-A-10-212319, a propylene homopolymer (A-1) was produced.

[0129] The physical properties of the propylene homopolymer (A-1) were as follows. · Melt flow rate (temperature 230 °C, load 2.16 kg): 19 g / 10 min · Intrinsic viscosity: 1.30 dL / g

[0130] <A-2: Acid-modified propylene homopolymer> By the method described in Example 2 of Patent No. 3906641, in the presence of radicals by peroxide, maleic anhydride was graft-reacted with a propylene homopolymer to produce an acid-modified propylene homopolymer (A-2).

[0131] The physical properties of the acid-modified propylene homopolymer (A-2) were as follows. · Melt flow rate (temperature 230°C, load 2.16 kg): 0.2 g / 10 min · Content of maleic anhydride monomer units contained in the acid-modified propylene homopolymer (A-2): 0.24% by mass <A-3: Heterophasic propylene polymerization material> Using the polymerization catalyst obtained by the method described in Example 1 of JP-A-2004-182981, a heterophasic propylene polymerization material (A-3) was produced by polymerization by the liquid phase-gas phase polymerization method.

[0132] The physical properties of the heterophasic propylene polymerization material (A-3) were as follows. · Melt flow rate (temperature 230°C, load 2.16 kg): 0.5 g / 10 min (a) Propylene homopolymer component · Intrinsic viscosity: 2.80 dL / g (b) Ethylene-propylene random copolymer component · Content in A-3: 16% by mass · Intrinsic viscosity: 3.20 dL / g · Content of monomer units derived from ethylene: 40% by mass

[0133] (B) Neutralizing agent <B-1: Magnesium aluminum hydroxide carbonate (CAS No.: 11097-59-9)> Hydrotalcite "DHT (registered trademark)-4C" manufactured by Kyowa Chemical Industry Co., Ltd. was used.

[0134] <00​​​​​​​​(D) Phosphorus-based antioxidant <D-1: 2,2'-Methylenebis(4,6-di-tert-butylphenyl) 2-ethylhexyl phosphite (CAS No.: 126050-54-2)> "ADEKA's "ADEKASTAB (registered trademark) HP-10" was used. <D-2: 3,9-Bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane (CAS No.: 80693-00-1)> "ADEKA's "ADEKASTAB (registered trademark) PEP-36" was used. <D-3: Tris(2,4-di-tert-butylphenyl) phosphite (CAS No.: 31570-04-4)> "ADEKA's "ADEKASTAB (registered trademark) 2112" was used. <D-4: 6-[3-(3-tert-Butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenzod[d,f][1,3,2]dioxaphosphepine (CAS No.: 203255-81-6)> "Sumitomo Chemical's "Sumilizer (registered trademark) GP" was used. <D-5: 3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane (CAS No.: 26741-53-7)> "SONGWONG's "Songnox (registered trademark) 6260" was used.

[0136] (Example 1) [Manufacture of SUS steel plate - polypropylene film laminate having an acid-modified polypropylene layer] First, the acid-modified propylene homopolymer (A-2) and the heterophasic propylene polymer material (A-3) were fed into a coextrusion multilayer film-forming machine and coextruded to produce a coextruded two-layer polypropylene film (hereinafter referred to as polypropylene film) containing an acid-modified propylene homopolymer layer and a heterophasic propylene polymer material layer, with a total film thickness of 50 μm. Note that for the polypropylene film, the layer thickness ratio of the acid-modified propylene homopolymer layer / heterophagic propylene polymer material layer was 9 / 1.

[0137] The obtained polypropylene film was placed on a 300 μm thick SUS steel plate so that the acid-modified propylene homopolymer layer was in contact with the SUS steel plate, and the two were thermally bonded to produce a SUS steel plate-polypropylene film laminate.

[0138] [Production of resin composition] The components were mixed in the blending ratios shown in Example 1 of Table 2, and the mixture was melt-kneaded by feeding it from the hopper of a twin-screw kneader (TEX44, manufactured by The Japan Steel Works, Ltd.) set at a cylinder temperature of 200°C and a screw rotation speed of 200 rpm. The resulting melt-kneaded product was strand-cut to obtain a pellet-shaped resin composition.

[0139] [Evaluation of water-sealed adhesive durability] <Production of ribbed flat plates> The resulting resin composition was insert-molded into the polypropylene layer of a SUS steel plate-polypropylene film laminate using an injection molding machine (Toshiba Machine IS100EN) set at a cylinder temperature of 230°C and a mold temperature of 50°C. This produced a molded product: a ribbed flat plate in which a resin composition layer (hereinafter referred to as Layer A) was laminated onto the polypropylene layer, with ribs formed on the surface of Layer A. One edge of the SUS steel plate-polypropylene film laminate was masked with cellophane tape to a width of 3 mm, creating a section (hereinafter referred to as a gripping area) where no polypropylene film was laminated. Providing a gripping area on the SUS steel plate-polypropylene film laminate allowed the presence or absence of delamination to be confirmed by gripping the gripping area during the water-sealed adhesion durability test and the high-temperature, high-humidity adhesion durability test, which will be described later.

[0140] <Testing water-sealed product adhesion durability> The two resulting ribbed plates were thermally melted on the ribbed side using a hot plate set to 230°C, and 1 mL of water was dropped into the recess of one of the two ribbed plates. The fused ribbed surfaces of the two ribbed plates were then quickly pressed together. The resulting water-sealed test specimens were placed in a 110°C oven and observed daily for delamination between the polypropylene layer and the SUS steel plate. Delamination was confirmed by grasping the grip provided on one edge of the SUS steel plate-polypropylene film laminate and gently pulling with your hand. The durability of the water-sealed adhesion was evaluated by measuring the time from when the specimen was placed in the oven until delamination occurred. The results are shown in Table 2.

[0141] [Evaluation of adhesion durability under high temperature and humidity conditions] <Plate manufacturing> The obtained resin composition was insert molded into the polypropylene layer of a SUS steel plate-polypropylene film laminate using an injection molding machine (Toshiba Machine IS100EN) set at a cylinder temperature of 230°C and a mold temperature of 50°C, to produce a molded product, a 150 mm x 150 mm x 2 mm thick flat plate in which Layer A was laminated onto the polypropylene layer.

[0142] <Test of adhesion durability under high temperature and humidity> The resulting plates were placed in a thermo-hygrostat chamber at 80°C and 95% RH, and the plates were observed every day for delamination. The presence or absence of delamination was checked by grasping the grip provided on one edge of the SUS steel plate-polypropylene film laminate and gently pulling with one hand. The durability of adhesion under high temperature and humidity was evaluated by measuring the time from the time the plate was placed in the thermo-hygrostat chamber until delamination occurred. The results are shown in Table 2.

[0143] (Examples 2 to 4, Comparative Examples 1 and 2) Molded articles were obtained in the same manner as in Example 1, except that the components were mixed in the blending ratios shown in Examples 2 to 4 or Comparative Examples 1 and 2 in Table 2. The obtained molded articles were used to evaluate the adhesion durability of water-sealed products and the adhesion durability under high temperature and high humidity conditions. The results are shown in Table 2.

[0144] [Table 2]

[0145] From Table 2, it was found that the molded articles of the examples which satisfied all the constituent requirements of the present invention were less likely to separate from the adherend in the presence of moisture than the molded articles of the comparative examples.

Claims

1. The adhesive tape comprises an adherend and a layer A laminated on the adherend, the layer A contains a polyolefin resin and a phosphorus-based antioxidant, the content of the phosphorus-based antioxidant is 0.01 parts by mass or more and 1 part by mass or less relative to 100 parts by mass of the polyolefin-based resin, The phosphorus-based antioxidant has 16 or more atoms (excluding hydrogen atoms) located within 4.6 Å of the phosphorus atom.

2. 2. The molded article according to claim 1, wherein the surface of the layer A that is to be laminated with the adherend has been subjected to a corona discharge treatment.

3. The molded article according to claim 1 , wherein a modified polyolefin resin is interposed between the layer A and the adherend.

4. 2. The molded body according to claim 1, wherein the atom located less than 4.6 Å from the phosphorus atom is at least one atom selected from the group consisting of carbon atoms, oxygen atoms, nitrogen atoms, aluminum atoms, iron atoms, sodium atoms, calcium atoms, and boron atoms.

5. The molded article according to claim 1, wherein the phosphorus-based antioxidant is at least one selected from the group consisting of 2,2'-methylenebis(4,6-di-tert-butylphenyl)2-ethylhexyl phosphite, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(2,4-di-tert-butylphenyl)phosphite, and 6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepine.

6. The molded article according to claim 1 , wherein the adherend is a metal.

7. The molded body according to claim 6 , wherein the metal is at least one of aluminum and iron.

8. The molded article according to claim 1 , which is used in the presence of moisture.

9. The molded article according to claim 8 , wherein the state in the presence of moisture is a state in which a fluid containing moisture is contained therein.

10. The molded article according to claim 9 , wherein the fluid containing water is an electrolyte solution used in a battery.

11. The molded article according to claim 8 , wherein the condition in the presence of moisture is a high-temperature and high-humidity condition of 40° C. or higher and 70% Rh or higher.

12. The molded article according to claim 1 , which is used as a packaging material.

13. The packaged item is wrapped in the packaging material, A packaging body, wherein the packaging material is the molded body according to any one of claims 1 to 12.

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