Crystallinity inhibitor for polyolefin resin, method for inhibiting crystallinity of polyolefin resin using the same, and method for producing polyolefin resin composition

Abstract

To provide a resin composition in which crystallinity of a resin component is suppressed, and a molded article thereof.SOLUTION: The resin composition contains a polyolefin resin and a nucleating agent. The nucleating agent melts at a temperature higher by 150°C than the melting point of the polyolefin resin or dissolves in the polyolefin resin at a temperature higher by 150°C than the melting point of the polyolefin resin. The nucleating agent increases the crystallization temperature of the polyolefin resin by 7°C or more when added in an amount of 0.2 pt.mass based on 100 pts.mass of the polyolefin resin. The content of the nucleating agent is 0.005 pt.mass or more and less than 0.1 pt.mass based on 100 pts.mass of the polyolefin resin.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a resin composition and a molded article thereof, and more particularly to a resin composition in which the crystallinity of a resin component is suppressed and a molded article thereof.

Background Art

[0002] When producing synthetic fibers or films by processing resin materials containing crystalline resins such as polyolefin resins and polyamide resins, or when producing laminates by laminating such resin materials on substrates made of wood or fibrous materials, etc., it has been desired that the crystallinity of the resin component be sufficiently suppressed.

[0003] As a resin composition in which the crystallinity of a resin component is suppressed, for example, Patent Document 1 proposes a resin composition containing silicone oil.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the resin composition described in Patent Document 1 contains a large amount of silicone oil in order to suppress the crystallinity of the resin component, and as a result, the physical properties of the molded article obtained from this resin composition may not be sufficient.

[0006] Therefore, an object of the present invention is to provide a resin composition in which the crystallinity of a resin component is suppressed and a molded article thereof.

Means for Solving the Problems

[0007] As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by a polyolefin-based resin composition containing a nucleating agent having specific properties at a specific ratio, and have completed the present invention.

[0008] That is, the resin composition of the present invention is a resin composition containing a polyolefin resin and a nucleating agent, where the nucleating agent is a nucleating agent that melts at a temperature 150 °C higher than the melting point of the polyolefin resin, or a nucleating agent that dissolves in the polyolefin resin at a temperature 150 °C higher than the melting point of the polyolefin resin, and when 0.2 parts by mass of the nucleating agent is added to 100 parts by mass of the polyolefin resin, the nucleating agent is one that improves the crystallization temperature of the polyolefin resin by 7 °C or more, and the content of the nucleating agent with respect to 100 parts by mass of the polyolefin resin is 0.005 parts by mass or more and less than 0.1 parts by mass.

[0009] In the resin composition of the present invention, the melting point of the nucleating agent is preferably 150 to 300 °C. Also, in the resin composition of the present invention, it is preferable that the nucleating agent contains a triazine compound represented by the following general formula (1).

[0010]

[0011] Here, in the general formula (1), Ar , 5 , , 3 , , 1 , 3 , 2 , 4 , 2 ,

[0014] ,

[0013] , 、Ar 2 and Ar 3 each independently represent a phenyl group with or without a substituent.

[0012] Furthermore, in the resin composition of the present invention, it is also preferable that the nucleating agent contains an acetal compound represented by the following general formula (2).

[0013]

[0014] Here, in the general formula (2), R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R 2 、R 3 、R 4 and R 5 each independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, or R 2 and R 3 or R4 and R 5 These groups are linked together to represent an alkylene group with 3 to 6 carbon atoms or an alkylenedioxy group with 1 to 4 carbon atoms, and X represents a single bond, a -CH(OH)- group, or a -CH(OH)CH(OH)- group.

[0015] In the resin composition of the present invention, the "melting point" of the polyolefin resin is determined by measurement using a differential scanning calorimetry device, and is the temperature of the endothermic peak top observed when the polyolefin resin is heated from room temperature at a rate of 10°C / min in a nitrogen atmosphere. Similarly, the "melting point" of the nucleating agent is determined by measurement using a differential scanning calorimetry device, and is the temperature of the endothermic peak top observed when the nucleating agent is heated from room temperature at a rate of 10°C / min in a nitrogen atmosphere.

[0016] Furthermore, in the resin composition of the present invention, the crystallization temperature of the polyolefin resin is the crystallization temperature measured in accordance with JIS K 7121 using a differential scanning calorimetry device.

[0017] The molded article of the present invention is characterized by being obtained by molding the resin composition of the present invention. [Effects of the Invention]

[0018] According to the present invention, it is possible to provide a resin composition in which the crystallinity of the resin component is suppressed, and a molded article thereof. [Brief explanation of the drawing]

[0019] [Figure 1] The complex viscosity η obtained from the dynamic viscoelasticity measurement of the resin composition of Example 12 * This is a graph plotting the data against the measured temperature. [Modes for carrying out the invention]

[0020] Embodiments of the present invention will be described in detail below. <Resin composition> The resin composition of the present invention comprises a polyolefin resin and a nucleating agent. In the composition of the present invention, the nucleating agent melts at a temperature 150°C higher than the melting point of the polyolefin resin, or dissolves in the polyolefin resin at a temperature 150°C higher than the melting point of the polyolefin resin, and when 0.2 parts by mass of the nucleating agent is added per 100 parts by mass of the polyolefin resin, the crystallization temperature of the polyolefin resin is raised by 7°C or more. Furthermore, in the resin composition of the present invention, the content of the nucleating agent per 100 parts by mass of the polyolefin resin is 0.005 parts by mass or more and less than 0.1 parts by mass. With this configuration, the crystallinity of the resin component is suppressed in the resin composition of the present invention. The reason for this is thought to be as follows.

[0021] When a resin composition obtained by adding the nucleating agent according to the present invention to a polyolefin resin in a conventional amount (for example, 0.2 parts by mass per 100 parts by mass of resin) is heated and plasticized, the nucleating agent melts or dissolves in the polyolefin resin and diffuses into the resin matrix. When the resulting molten resin is cooled, the nucleating agent in the resin matrix self-assembles into microcrystals. These microcrystals then act as crystal nuclei, promoting the crystallization of the polyolefin resin.

[0022] On the other hand, when the resin composition of the present invention is similarly heated and plasticized and then cooled, the concentration of the nucleating agent in the resin matrix is ​​sufficiently low, preventing the nucleating agent from self-assembling within the resin matrix. Furthermore, the strong interaction between the nucleating agent molecules and the resin molecules inhibits the expansion of the crystalline domains of the resin molecules. From these results, it is presumed that the resin composition of the present invention suppresses the crystallization of polyolefin-based resins. The components of the resin composition of the present invention will be described in detail below.

[0023] <Polyolefin resins> The polyolefin resin according to the resin composition of the present invention can be used regardless of molecular weight, degree of polymerization, density, softening point, proportion of insoluble matter in the solvent, degree of stereoregularity, presence or absence of catalyst residue, type and blending ratio of raw material monomers, type of polymerization catalyst (e.g., Ziegler catalyst, metallocene catalyst, etc.). In the resin composition of the present invention, a polyolefin resin refers to a resin in which the proportion of polyolefin is 70% by mass or more of the resin component, preferably 80% by mass or more, more preferably 90% by mass or more, and particularly preferably 100% by mass.

[0024] Examples of polyolefin resins include polyethylene, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, homopolypropylene, random copolymer polypropylene, block copolymer polypropylene, impact copolymer polypropylene, high-impact copolymer polypropylene, isotactic polypropylene, syndiotactic polypropylene, hemiisotactic polypropylene, maleic anhydride-modified polypropylene, polybutene, cycloolefin polymer, stereoblock polypropylene, α-olefin polymers such as poly-3-methyl-1-butene, poly-3-methyl-1-pentene, and poly-4-methyl-1-pentene, ethylene / propylene block or random copolymers, ethylene-methyl methacrylate copolymers, and ethylene-vinyl acetate copolymers, and may also be elastomers. In the resin composition of the present invention, two or more of these may be used in blend form, a block copolymer may be formed and used as a block polymer type, and the resin may be alloyed. Furthermore, these polyolefin resins may be chlorinated products.

[0025] Examples of polyolefin-based resin elastomers include elastomers obtained by blending polyolefins such as polypropylene and polyethylene as hard segments and rubbers such as ethylene-propylene rubber as soft segments, or elastomers obtained by dynamic crosslinking.

[0026] Examples of hard segments include at least one selected from polypropylene homopolymer, polypropylene block copolymer, polypropylene random copolymer, and the like.

[0027] Examples of soft segments include ethylene-propylene copolymer (EPM), ethylene-propylene-diene copolymer (EPDM), ethylene-vinyl acetate copolymer (EVA), and vinyl acetate homopolymer. Two or more of these may be used in blend form.

[0028] <Nuclear agent> The nucleating agent in the resin composition of the present invention is a nucleating agent that melts at a temperature 150°C higher than the melting point of the polyolefin resin, or a nucleating agent that dissolves in the polyolefin resin at a temperature 150°C higher than the melting point of the polyolefin resin. When the nucleating agent melts at a temperature 150°C higher than the melting point of the polyolefin resin, during the molding process of the resin composition, the nucleating agent melts into a liquid state and diffuses into the molten plasticized polyolefin resin. When the nucleating agent dissolves in the polyolefin resin at a temperature 150°C higher than the melting point of the polyolefin resin, during the molding process of the resin composition, the nucleating agent dissolves in the molten plasticized polyolefin resin and diffuses into the molten liquid.

[0029] The nucleating agent contained in the resin composition of the present invention is preferably a nucleating agent that melts at a temperature 120°C higher than the melting point of the polyolefin resin, or dissolves in the polyolefin resin at a temperature 120°C higher than the melting point of the polyolefin resin; more preferably a nucleating agent that melts at a temperature 100°C higher than the melting point of the polyolefin resin, or dissolves in the polyolefin resin at a temperature 100°C higher than the melting point of the polyolefin resin; and particularly preferably a nucleating agent that melts at a temperature 70°C higher than the melting point of the polyolefin resin, or dissolves in the polyolefin resin at a temperature 70°C higher than the melting point of the polyolefin resin.

[0030] Furthermore, the melting point of the nucleating agent contained in the resin composition of the present invention is preferably 150 to 300°C. When the melting point of the nucleating agent is 150°C or higher, the crystallinity of the resin component is more effectively suppressed. Also, when the melting point of the nucleating agent is 300°C or lower, the molding temperature of the resin composition can be sufficiently low, and discoloration and deterioration of physical properties of the molded product can be suppressed. The melting point of the nucleating agent is more preferably 280°C or lower, even more preferably 250°C or lower, and particularly preferably 230°C or lower. Furthermore, the melting point of the nucleating agent is more preferably 180°C or higher, and even more preferably 200°C or higher.

[0031] Furthermore, as described above, the nucleating agent in the resin composition of the present invention also raises the crystallization temperature of the polyolefin resin by 7°C or more when 0.2 parts by mass of the nucleating agent are added to 100 parts by mass of the polyolefin resin. If the degree of improvement in the crystallization temperature of the polyolefin resin is less than 7°C when 0.2 parts by mass of the nucleating agent are added to 100 parts by mass of the polyolefin resin, the molecules of the nucleating agent cannot be said to have sufficiently strong interactions with the resin molecules and cannot effectively inhibit the expansion of the crystalline domains of the resin molecules. Therefore, a nucleating agent that raises the crystallization temperature of the polyolefin resin by less than 7°C when 0.2 parts by mass of the nucleating agent are added to 100 parts by mass of the polyolefin resin cannot sufficiently suppress the crystallization of the polyolefin resin. In other words, if the nucleating agent raises the crystallization temperature of the polyolefin resin by less than 7°C when 0.2 parts by mass of the nucleating agent are added to 100 parts by mass of the polyolefin resin, the crystallinity of the resin components in the resin composition will not be sufficiently suppressed. The nucleating agent in the resin composition of the present invention preferably raises the crystallization temperature of the polyolefin resin by 9°C or more, and more preferably by 11°C or more, when 0.2 parts by mass of the nucleating agent is added to 100 parts by mass of the polyolefin resin.

[0032] Compounds included in the nucleating agent of the resin composition of the present invention include, for example, triazine compounds represented by the following general formula (1), acetal compounds represented by the following general formula (2), methylenebisphenylamide, trisamidebenzene, and other amide compounds. These may be included in the resin composition individually or in combination of two or more. Among these, triazine compounds represented by the following general formula (1) and acetal compounds represented by the following general formula (2) are particularly preferred. That is, the nucleating agent is particularly preferably a triazine compound represented by the following general formula (1), and is also particularly preferably a acetal compound represented by the following general formula (2).

[0033]

[0034] In general formula (1), Ar 1 Ar 2 and Ar 3 Each of these independently represents a substituted or unsubstituted phenyl group.

[0035] Also, in general formula (2), R 1 R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. 2 , R 3 , R 4 and R 5 Each of these independently represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, or R 2 and R 3 or R 4 and R 5 These groups are linked together to represent an alkylene group with 3 to 6 carbon atoms or an alkylenedioxy group with 1 to 4 carbon atoms. X represents a single bond, a -CH(OH)- group, or a -CH(OH)CH(OH)- group.

[0036] Ar in general formula (1) 1 Ar 2 and Ar 3The substituents it may have include halogen atoms, hydroxyl groups, carboxyl groups, optionally substituted amino groups, aminocarbonyl groups (also called carbamoyl groups), nitro groups, cyano groups, thiol groups, sulfo groups, sulfonamide groups, formyl groups, optionally substituted alkyl groups having 1 to 20 carbon atoms, optionally substituted aryl groups having 6 to 20 carbon atoms, optionally substituted arylalkyl groups having 7 to 20 carbon atoms, optionally substituted alkoxy groups having 1 to 20 carbon atoms, optionally substituted aryloxy groups having 6 to 20 carbon atoms, optionally substituted alkylthio groups having 1 to 20 carbon atoms, optionally substituted arylthio groups having 6 to 20 carbon atoms, optionally substituted acyl groups having 2 to 20 carbon atoms, and optionally substituted acyl groups having 2 to 20 carbon atoms. Examples include oxy groups, optionally substituted alkoxycarbonyl groups having 2 to 20 carbon atoms, optionally substituted aryloxycarbonyl groups having 7 to 20 carbon atoms, optionally substituted alkylaminocarbonyl groups having 2 to 20 carbon atoms, optionally substituted arylaminocarbonyl groups having 7 to 20 carbon atoms, optionally substituted dialkylaminocarbonyl groups having 3 to 20 carbon atoms, optionally substituted diarylaminocarbonyl groups having 13 to 20 carbon atoms, optionally substituted alkylarylaminocarbonyl groups having 8 to 20 carbon atoms, optionally substituted alkylcarbonylamino groups having 2 to 20 carbon atoms, optionally substituted arylcarbonylamino groups having 7 to 20 carbon atoms, and optionally substituted heterocyclic groups having 2 to 20 carbon atoms. Furthermore, carboxyl groups and sulfo groups may form salts.Preferably, the group is an alkyl group having 1 to 20 carbon atoms which may have substituents, an aryl group having 6 to 20 carbon atoms which may have substituents, an aminocarbonyl group, a carboxyl group, a halogen atom, a cyano group, an alkylaminocarbonyl group having 2 to 20 carbon atoms which may have substituents, an alkoxycarbonyl group having 2 to 20 carbon atoms which may have substituents, an acyl group having 2 to 20 carbon atoms which may have substituents, or an arylalkyl group having 7 to 20 carbon atoms which may have substituents. More preferably, the group is an alkyl group having 1 to 20 carbon atoms which may have substituents, an aryl group having 6 to 20 carbon atoms which may have substituents, or an aminocarbonyl group.

[0037] Also, Ar 1 Ar 2 and Ar 3 Examples of substituents on the compound include alkyl groups, alkoxy groups, alkylthio groups, alkenyl groups, arylalkyl groups, aryl groups, aryloxy groups, arylthio groups, heterocyclic groups, halogen atoms, acyl groups, acyloxy groups, substituted amino groups, sulfonamide groups, sulfonyl groups, carboxyl groups, cyano groups, sulfo groups, hydroxyl groups, nitro groups, mercapto groups, imide groups, carbamoyl groups, and sulfonamide groups, and these groups may be further substituted. Furthermore, carboxyl groups and sulfo groups may form salts.

[0038] Ar 1 Ar 2 and Ar 3 Examples of alkyl groups that it possesses include methyl, ethyl, propyl, isopropyl, cyclopropyl, butyl, sec-butyl, tert-butyl, isobutyl, amyl, isoamyl, tert-amyl, cyclopentyl, hexyl, 2-hexyl, 3-hexyl, cyclohexyl, bicyclohexyl, 1-methylcyclohexyl, heptyl, 2-heptyl, 3-heptyl, isoheptyl, tert-heptyl, n-octyl, isooctyl, tert-octyl, 2-ethylhexyl, nonyl, isononyl, decyl, and the like.

[0039] Ar 1 Ar 2 and Ar 3 Examples of alkoxy groups that it possesses include methyloxy, ethyloxy, propyloxy, isopropyloxy, butyloxy, sec-butyloxy, tert-butyloxy, isobutyloxy, amyloxy, isoamyloxy, tert-amyloxy, hexyloxy, cyclohexyloxy, heptyloxy, isoheptyloxy, tert-heptyloxy, n-octyloxy, isooctyloxy, tert-octyloxy, 2-ethylhexyloxy, nonyloxy, decyloxy, and the like.

[0040] Ar 1 Ar 2 and Ar 3 Examples of alkylthio groups that can be found include methylthio, ethylthio, propylthio, isopropylthio, butylthio, sec-butylthio, tert-butylthio, isobutylthio, amylthio, isoamylthio, tert-amylthio, hexylthio, cyclohexylthio, heptylthio, isoheptylthio, tert-heptylthio, n-octylthio, isooctylthio, tert-octylthio, 2-ethylhexylthio, and the like.

[0041] Ar 1 Ar 2 and Ar 3 Examples of arylalkyl groups that it possesses include benzyl, phenethyl, diphenylmethyl, triphenylmethyl, styryl, and cinnamyl.

[0042] Ar 1 Ar 2 and Ar 3 Examples of aryl groups it possesses include phenyl and naphthyl.

[0043] Ar 1 Ar 2 and Ar 3Examples of aryloxy groups that it possesses include phenoxy and naphthyloxy.

[0044] Ar 1 Ar 2 and Ar 3 Examples of arylthio groups that can be present include phenylthio and naphthylthio.

[0045] Ar 1 Ar 2 and Ar 3 Examples of heterocyclic groups that can be found include pyridyl, pyrimidyl, pyridadyl, piperidyl, pyranyl, pyrazolyl, triazyl, pyrrolyl, quinolyl, isoquinolyl, imidazolyl, benzimidazolyl, triazolyl, furyl, furanyl, benzofuranyl, thienyl, thiophenyl, benzothiophenyl, thiadiazolyl, thiazolyl, benzothiazolyl, oxazolyl, benzoxazolyl, isothiazolyl, isoxazolyl, indolyl, 2-pyrrolidinone-1-yl, 2-piperidone-1-yl, 2,4-dioxyimidazolidine-3-yl, and 2,4-dioxyxazolidine-3-yl.

[0046] Ar 1 Ar 2 and Ar 3 Examples of halogen atoms it may contain include fluorine, chlorine, bromine, and iodine.

[0047] Ar 1 Ar 2 and Ar 3 Examples of acyl groups that can be found include acetyl, 2-chloroacetyl, propionyl, octanoyl, acryloyl, methacryloyl, phenylcarbonyl (benzoyl), phthaloyl, 4-trifluoromethylbenzoyl, pivaloyl, salicyloyl, oxaloyl, stearoyl, methoxycarbonyl, ethoxycarbonyl, t-butoxycarbonyl, n-octadecyloxycarbonyl, and carbamoyl.

[0048] Ar 1 Ar 2 and Ar 3 Examples of acyloxy groups that it possesses include acetyloxy and benzoyloxy.

[0049] Ar 1 Ar 2 and Ar 3 Examples of alkylaminocarbonyl groups that can be found include methylaminocarbonyl, ethylaminocarbonyl, tert-butylaminocarbonyl, isobutylaminocarbonyl, cyclohexylaminocarbonyl, dimethylaminocarbonyl, N-methyl-N-ethylaminocarbonyl, and diethylaminocarbonyl.

[0050] Ar 1 Ar 2 and Ar 3 Examples of amino groups that may have substituents include amino, ethylamino, dimethylamino, diethylamino, butylamino, cyclopentylamino, 2-ethylhexylamino, dodecylamino, anilino, chlorophenylamino, toluidino, anisidino, N-methyl-anilino, diphenylamino, naphthylamino, 2-pyridylamino, methoxycarbonylamino, phenoxycarbonylamino, acetylamino, benzoylamino, formylamino, pivaloylamino, lauroylamino, and carbamo. Examples include ylamino, N,N-dimethylaminocarbonylamino, N,N-diethylaminocarbonylamino, morpholinocarbonylamino, methoxycarbonylamino, ethoxycarbonylamino, t-butoxycarbonylamino, n-octadecyloxycarbonylamino, N-methyl-methoxycarbonylamino, phenoxycarbonylamino, sulfamoylamino, N,N-dimethylaminosulfonylamino, methylsulfonylamino, butylsulfonylamino, and phenylsulfonylamino.

[0051] Specific examples of triazine compounds represented by general formula (1) include, for example, compounds No. 1 to No. 59 listed below. Among these, the triazine compounds No. 49, No. 50, No. 58, or No. 59 are particularly preferred.

[0052]

[0053] A method for producing the triazine compound represented by general formula (1) is, for example, using cyanuric acid chloride as a raw material in an organic solvent, and adding 1 equivalent of Ar 1 Ar 2 Ar 3 One possible method involves sequentially reacting the corresponding phenol compounds in the presence of one equivalent of each base (such as triethylamine or sodium hydroxide).

[0054] As mentioned above, in general formula (2), R 1 R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. 2 , R 3 , R 4 and R 5 Each of these independently represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, or R 2 and R 3 or R 4 and R 5 These groups are linked together to represent an alkylene group with 3 to 6 carbon atoms or an alkylenedioxy group with 1 to 4 carbon atoms. X represents a single bond, a -CH(OH)- group, or a -CH(OH)CH(OH)- group.

[0055] Examples of alkyl groups having 1 to 4 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, and tert-butyl groups.

[0056] Examples of alkoxy groups having 1 to 4 carbon atoms include methoxy, ethoxy, n-propoxy, isopropoxy, n-butyloxy, isobutyloxy, sec-butyloxy, and tert-butyloxy groups.

[0057] Examples of alkylene groups having 3 to 6 carbon atoms include propylene, butylene, pentylene, and hexylene groups.

[0058] Examples of alkylenedioxy groups having 1 to 4 carbon atoms include methylenedioxy, ethylenedioxy, propylenedioxy, and butylenedioxy groups.

[0059] Examples of halogen atoms include fluorine, chlorine, bromine, and iodine.

[0060] Among the acetal compounds represented by general formula (2), R 1 , R 2 , R 3 , R 4 and R 5 Preferably, each of these is independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and X is a -CH(OH)- group.

[0061] Specific examples of acetal compounds represented by general formula (2) include, for example, compounds No. 60 to No. 63 listed below. Among these, the acetal compounds represented by compound No. 60, compound No. 61, or compound No. 62 are particularly preferred.

[0062]

[0063] Examples of methods for producing acetal compounds represented by general formula (2) include a method of dehydrating and condensing an algitol compound such as sorbitol with an aryl aldehyde in the presence of an acid catalyst.

[0064] As described above, in the resin composition of the present invention, the content of the nucleating agent per 100 parts by mass of the polyolefin resin is 0.005 parts by mass or more and less than 0.1 parts by mass. If the content of the nucleating agent is less than 0.005 parts by mass, the crystallinity of the resin component is not sufficiently suppressed. If the content of the nucleating agent is 0.1 parts by mass or more, the crystallinity of the resin component is promoted. It is more preferable that the content of the nucleating agent be 0.01 parts by mass or more, and even more preferable that it be 0.02 parts by mass or more. Furthermore, it is preferable that the content of the nucleating agent be 0.08 parts by mass or less, more preferably 0.07 parts by mass or less, even more preferably 0.05 parts by mass or less, and particularly preferable that it be 0.03 parts by mass or less.

[0065] In addition to the polyolefin resin and nucleating agent described above, the resin composition of the present invention may further contain additives such as phenolic antioxidants, phosphorus-based antioxidants, sulfur-based antioxidants, fatty acid metal salts, ultraviolet absorbers, hindered amine compounds, flame retardants, flame retardant aids, lubricants, fillers, hydrosaltites, antistatic agents, fluorescent whitening agents, pigments, and dyes. These additives may be included individually or in combination of two or more.

[0066] Examples of phenolic antioxidants include 2,6-di-tert-butyl-4-ethylphenol, 2-tert-butyl-4,6-dimethylphenol, styrenephenol, 2,2'-methylenebis(4-ethyl-6-tert-butylphenol), 2,2'-thiobis-(6-tert-butyl-4-methylphenol), 2,2'-thiodiethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2-methyl-4,6-bis(octylsulfanylmethyl)phenol, 2,2'-isobutylidenebis(4,6-dimethylphenol), isooctyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) (ADEKA POLYMER ADDITIVES EUROPE) SAS Corporation product name "AO.OH.98"), 2,2'-methylenebis[6-(1-methylcyclohexyl)-p-cresol], 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylbenzyl)-4-methylphenyl acrylate, 2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl acrylate, 6- [3-(3-tert-butyl-4-hydroxy-5-methyl)propoxy]-2,4,8,10-tetra-tert-butylbenz[d,f][1,3,2]-dioxaphosphobine, hexamethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], bis[monoethyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate]calcium salt, 5,Reaction product of 7-bis(1,1-dimethylethyl)-3-hydroxy-2(3H)-benzofuranone and o-xylene, 2,6-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazine-2-ylamino)phenol, DL-α-tocopherol (vitamin E), 2,6-bis(α-methylbenzyl)-4-methylphenol, bis[3,3-bis-(4'-hydroxy-3'-tert-butyl-phenyl)butanoic acid] glycol ester, 2,6-di-tert-butyl-p-cresol, 2,6-diphenyl Nyl-4-octadecyloxyphenol, stearyl(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, distearyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate, tridecyl-3,5-tert-butyl-4-hydroxybenzylthioacetate, thiodiethylenebis[(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 4,4'-thiobis(6-tert-butyl-m-cresol), 2-octylthio-4,6-di(3,5-di-tert-butyl 4-hydroxyphenoxy)-s-triazine, 2,2'-methylenebis(4-methyl-6-tert-butylphenol), bis[3,3-bis(4-hydroxy-3-tert-butylphenyl)butyric acid] glycol ester, 4,4'-butylidenebis(2,6-di-tert-butylphenol), 4,4'-butylidenebis(6-tert-butyl-3-methylphenol), 2,2'-ethylidenebis(4,6-di-tert-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-te rt-butylphenyl)butane, bis[2-tert-butyl-4-methyl-6-(2-hydroxy-3-tert-butyl-5-methylbenzyl)phenyl]terephthalate, 1,3,5-tris(2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl)isocyanurate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, 1,3,5-tris[(3,[5-di-tert-butyl-4-hydroxyphenyl)propionyloxyethyl]isocyanurate, tetrakis[methylene-3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]methane, 2-tert-butyl-4-methyl-6-(2-acryloyloxy-3-tert-butyl-5-methylbenzyl)phenol, 3,9-bis[2-(3-tert-butyl-4-hydroxy-5-methylhydrocinnamoyloxy)-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, triethylene glycol bis[ Examples include β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, stearyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid amide, palmityl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid amide, myristyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid amide, lauryl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid amide, and other 3-(3,5-dialkyl-4-hydroxyphenyl)propionic acid derivatives. These may be included individually or in combination of two or more. The content of the phenolic antioxidant is not particularly limited; for example, it may be 0.001 to 5 parts by mass per 100 parts by mass of the polyolefin resin.

[0067] Examples of phosphorus-based antioxidants include triphenyl phosphite, diisooctyl phosphite, heptakis(dipropylene glycol) triphosphite, triisodecyl phosphite, diphenylisooctyl phosphite, diisooctylphenyl phosphite, diphenyltridecyl phosphite, triisooctyl phosphite, trilauryl phosphite, diphenyl phosphite, tris(dipropylene glycol) phosphite, dioleylhydrogen phosphite, trilauryltrithiophosphite, and bis(tridecyl) phosphite. Tris(isodecyl) phosphite, Tris(tridecyl) phosphite, Diphenyldecyl phosphite, Dinonylphenyl bis(nonylphenyl) phosphite, Poly(dipropylene glycol) phenyl phosphite, Tetraphenyldipropylene glycol diphosphite, Trisnonylphenyl phosphite, Tris(2,4-di-tert-butylphenyl) phosphite, Tris(2,4-di-tert-butyl-5-methylphenyl) phosphite, Tris[2-tert-butyl-4-(3-tert-butyl-4-Hyd [Loxy-5-methylphenylthio)-5-methylphenyl] phosphite, tri(decyl) phosphite, octyldiphenyl phosphite, di(decyl)monophenyl phosphite, mixture of distearyl pentaerythritol and calcium stearate, alkyl(C10) bisphenol A phosphite, tetraphenyl-tetra(tridecyl)pentaerythritol tetraphosphite, bis(2,4-di-tert-butyl-6-methylphenyl)ethyl phosphite, tetra(tridecyl)isopropylidene diphenol diphosphate Ito, Tetra(tridecyl)-4,4'-n-butylidenebis(2-tert-butyl-5-methylphenol)diphosphite, Hexa(tridecyl)-1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butanetriphosphite, Tetrakis(2,4-di-tert-butylphenyl)biphenylenediphosphonite, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, (1-methyl-1-propenyl-3-ylidene)tris(1,1-dimethylethyl)-5-methyl-4,1-Phenylene)Hexatridecylphosphite, 2,2'-Methylenebis(4,6-di-tert-butylphenyl)-2-ethylhexylphosphite, 2,2'-Methylenebis(4,6-di-tert-butylphenyl)-Octadecylphosphite, 2,2'-Ethylidenebis(4,6-di-tert-butylphenyl)fluorophosphite, 4,4'-Butylidenebis(3-methyl- 6-tert-butylphenyl ditridecyl) phosphite, tris(2-[(2,4,8,10-tetrakis-tert-butyldibenzo[d,f][1,3,2]dioxaphosfepin-6-yl)oxy]ethyl)amine, 3,9-bis(4-nonylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosfespiro[5,5]undecane, 2,4,6-tri-tert-butyl Examples include phenyl-2-butyl-2-ethyl-1,3-propanediol phosphite, poly-4,4'-isopropylidenediphenol C12-15 alcohol phosphite, bis(diisodecyl)pentaerythritol diphosphite, bis(tridecyl)pentaerythritol diphosphite, bis(octadecyl)pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,4,6-tri-tert-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, and bis(2,4-dicumylphenyl)pentaerythritol diphosphite. These may be included individually or in combination of two or more types. The content of the phosphorus-based antioxidant is not particularly limited; for example, it may be 0.001 to 10 parts by mass per 100 parts by mass of the polyolefin resin.

[0068] Examples of sulfur-based antioxidants include tetrakis[methylene-3-(laurylthio)propionate]methane, bis(methyl-4-[3-n-alkyl(C12 / C14)thiopropionyloxy]5-tert-butylphenyl) sulfide, ditridecyl-3,3'-thiodipropionate, dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, lauryl / stearylthiodipropionate, 4,4'-thiobis(6-tert-butyl-m-cresol), 2,2'-thiobis(6-tert-butyl-p-cresol), and distearyl-disulfide. These may be included individually or in combination of two or more. The amount of sulfur-based antioxidant is not particularly limited; for example, it may be 0.001 to 10 parts by mass per 100 parts by mass of polyolefin resin.

[0069] Examples of fatty acid metal salts include compounds represented by the following general formula (3). These may be included individually or in combination of two or more types.

[0070]

[0071] In general formula (3), R 6 represents a group obtained by removing the COOH group from a linear or branched fatty acid having 12 to 20 carbon atoms, and the fatty acid may be substituted with a hydroxyl group. M represents a 1 to 3 valent metal atom, and the metal atom may have a hydroxyl group. n represents an integer from 1 to 3. Among fatty acid metal salts, metal salts of lauric acid, myristic acid, palmitic acid, stearic acid, and 12-hydroxystearic acid are particularly preferred. Examples of 1 to 3 valent metal atoms include sodium, potassium, lithium, calcium, zinc, barium, magnesium, and hydroxyaluminum, with sodium, lithium, potassium, calcium, and zinc being particularly preferred. The content of the fatty acid metal salt is not particularly limited; for example, it may be 0.001 to 10 parts by mass per 100 parts by mass of polyolefin resin.

[0072] Examples of UV absorbers include 2-hydroxybenzophenones such as 2,4-dihydroxybenzophenone and 5,5'-methylenebis(2-hydroxy-4-methoxybenzophenone); 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole, 2-(2-hydroxy-3,5-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole, 2-( 2-Hydroxy-3,5-Dicumylphenyl)benzotriazole, 2,2'-Methylenebis(4-tert-octyl-6-benzotriazolylphenol), polyethylene glycol ester of 2-(2-hydroxy-3-tert-butyl-5-carboxyphenyl)benzotriazole, 2-[2-Hydroxy-3-(2-acryloyloxyethyl)-5-methylphenyl]benzotriazole, 2-[2-Hydroxy-3-(2-methacryloyloxyethyl)-5-tert-butylphenyl]benzotriazole, 2-[2-Hydroxy- 3-(2-methacryloyloxyethyl)-5-tert-octylphenyl]benzotriazole, 2-[2-hydroxy-3-(2-methacryloyloxyethyl)-5-tert-butylphenyl]-5-chlorobenzotriazole, 2-[2-hydroxy-5-(2-methacryloyloxyethyl)phenyl]benzotriazole, 2-[2-hydroxy-3-tert-butyl-5-(2-methacryloyloxyethyl)phenyl]benzotriazole, 2-[2-hydroxy-3-tert-amyl-5-(2-methacryloyloxyethyl) 2-(2-hydroxyphenyl)benzotriazoles such as phenyl]benzotriazole, 2-[2-hydroxy-3-tert-butyl-5-(3-methacryloyloxypropyl)phenyl]-5-chlorobenzotriazole, 2-[2-hydroxy-4-(2-methacryloyloxymethyl)phenyl]benzotriazole, 2-[2-hydroxy-4-(3-methacryloyloxy-2-hydroxypropyl)phenyl]benzotriazole, and 2-[2-hydroxy-4-(3-methacryloyloxypropyl)phenyl]benzotriazole;Substituted oxanilides such as phenyl salicylate, resorcinol monobenzoate, 2-ethyl-2'-ethoxyoxanilide, and 2-ethoxy-4'-dodecyloxanilide; cyanoacrylates such as ethyl-α-cyano-β,β-diphenyl acrylate and methyl-2-cyano-3-methyl-3-(p-methoxyphenyl)acrylate; 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-hexyloxyphenol, 2-(2-hydroxy-4-octoxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, trioctyl-2,2',2”-((1,3,5-triazine-2,4,6-triyl)tris(3-hydroxybenzene-4-,1-diyl)tripropionate), 2-(4, Examples include triazines such as 6-diphenyl-1,3,5-triazine-2-yl)-5-[2-(2-ethylhexanoyloxy)ethoxy]phenol, 2,4,6-tris(2-hydroxy-4-hexyloxy-3-methylphenyl)-1,3,5-triazine, and 1,12-bis[2-[4-(4,6-diphenyl-1,3,5-triazine-2-yl)-3-hydroxyphenoxy]ethyl]dodecanediate; various metal salts or metal chelates, especially nickel and chromium salts or chelates. These may be included individually or in combination of two or more. The amount of UV absorber is not particularly limited; for example, it may be 0.01 to 10 parts by mass per 100 parts by mass of polyolefin resin.

[0073] Examples of hindered amine compounds include 2,2,6,6-tetramethyl-4-piperidyl stearate, 1,2,2,6,6-pentamethyl-4-piperidyl stearate, 2,2,6,6-tetramethyl-4-piperidyl benzoate, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, tetrakis(2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butanetetracarboxylate, tetrakis(1,2,2,6,6-pentamethyl-4-piperidyl)-1,2,3,4-butanetetracarboxylate, Bis(2,2,6,6-tetramethyl-4-piperidyl) di(tridecyl)-1,2,3,4-butanetetracarboxylate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) di(tridecyl)-1,2,3,4-butanetetracarboxylate, bis(1,2,2,4,4-pentamethyl-4-piperidyl)-2-butyl-2-(3,5-di-tert-butyl-4-hydroxybenzyl)malonate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis (2,2,6,6-tetramethyl-4-piperidylamino)hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis(2,2,6,6-tetramethyl-4-piperidylamino)hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,5,8,12-tetrakis[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidyl)amino)-s-triazine-6-yl]-1,5,8,12-tetraazadodecane, 1,5,8,12-tetrakis[2,4-bis( N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-s-triazine-6-yl]-1,5,8-12-tetraazadodecane, 1,6,11-tris[2,4-bis(N-butyl-N-(2,2,6,6-tetramethyl-4-piperidyl)amino)-s-triazine-6-yl]aminoundecane, 1,6,11-tris[2,4-bis(N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-s-triazine-6-yl]aminoundecane, bis{4-(1-octyloxy-2,2,6,Examples include 6-tetramethyl)piperidyl}decandionate and bis{4-(2,2,6,6-tetramethyl-1-undecyloxy)piperidyl}carbonate. These may be included individually or in combination of two or more. The content of the hindered amine compound is not particularly limited; for example, it may be 0.001 to 10 parts by mass per 100 parts by mass of the polyolefin resin.

[0074] Examples of flame retardants include triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, cresyl-2,6-dixylenyl phosphate, resorcinol bis(diphenyl phosphate), (1-methylethylidene)-4,1-phenylenetetraphenyl diphosphate, 1,3-phenylenetetrakis(2,6-dimethylphenyl) phosphate, and ADEKA Corporation's product names "ADEKA Stab FP-500", "ADEKA Stab FP-600", and "ADEKA Stab Tab FP-800 contains aromatic phosphate esters, phosphonic acid esters such as divinyl phenylphosphonate, diallyl phenylphosphonate, and phenylphosphonic acid (1-butenyl), phosphinic acid esters such as phenyl diphenylphosphinate, methyl diphenylphosphinate, and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide derivatives, phosphazene compounds such as bis(2-allylphenoxy)phosphazene and dicresylphosphazene, melamine phosphate, melamine pyrophosphate, and melamine polyphosphate. Phosphorus-based flame retardants such as ammonium polyphosphate, ammonium polyphosphate, piperazine phosphate, piperazine pyrophosphate, piperazine polyphosphate, phosphorus-containing vinylbenzyl compounds and red phosphorus, metal hydroxides such as magnesium hydroxide and aluminum hydroxide, brominated bisphenol A type epoxy resin, brominated phenol novolac type epoxy resin, hexabromobenzene, pentabromotoluene, ethylenebis(pentabromopenyne), ethylenebistetrabromophthalimide, 1,2-dibromo-4-(1,2-dibromoethin Examples of brominated flame retardants include cyclohexane, tetrabromocyclooctane, hexabromocyclododecane, bis(tribromophenoxy)ethane, brominated polyphenylene ether, brominated polystyrene, and 2,4,6-tris(tribromophenoxy)-1,3,5-triazine, tribromophenylmaleimide, tribromophenyl acrylate, tribromophenyl methacrylate, tetrabromobisphenol A type dimethacrylate, pentabromobenzyl acrylate, and brominated styrene. These may be included individually or in combination of two or more.These flame retardants are preferably used in combination with drip inhibitors such as fluororesins and flame retardant additives such as polyhydric alcohols and hydrotalcite. The amount of flame retardant is not particularly limited; for example, it may be 1 to 100 parts by mass per 100 parts by mass of polyolefin resin. Similarly, the amount of flame retardant additive is not particularly limited; for example, it may be 0.1 to 10 parts by mass per 100 parts by mass of flame retardant.

[0075] Examples of lubricants include unsaturated fatty acid amides such as oleamide and erucamide; saturated fatty acid amides such as behenamide and stearamide; butyl stearate; stearyl alcohol; monoglyceride stearate; sorbitan monopalmitate; sorbitan monostearate; mannitol; stearic acid; hydrogenated castor oil; stearin amide; oleamide; ethylenebisstearate amide; and others. These may be included individually or in combination of two or more. The lubricant content is not particularly limited; for example, it may be 0.01 to 2 parts by mass per 100 parts by mass of polyolefin resin.

[0076] Fillers are broadly classified into organic and inorganic fillers. Organic fillers include naturally derived polymers such as starch, cellulose, wood flour, soybean pulp, rice husks, and wheat bran, as well as modified versions thereof. Inorganic fillers include talc, calcium carbonate, zinc carbonate, wollastonite, silica, mica, alumina, magnesium oxide, calcium silicate, sodium aluminate, calcium aluminosilicate, magnesium silicate, glass balloons, carbon black, zinc oxide, antimony trioxide, zeolite, metal fibers, metal whiskers, ceramic whiskers, potassium titanate, boron nitride, graphite, and carbon fiber. These may be included individually or in combination of two or more. The amount of filler is not particularly limited; for example, it may be 0.1 to 500 parts by mass per 100 parts by mass of polyolefin resin.

[0077] Hydrotalcites are complex salt compounds consisting of magnesium, aluminum, hydroxyl groups, carbonate groups, and arbitrary water of crystallization, known as natural or synthetic products. Examples include those in which part of the magnesium or aluminum is substituted with other metals such as alkali metals or zinc, or in which the hydroxyl groups or carbonate groups are substituted with other anionic groups. Specifically, examples include hydrotalcites represented by the following general formula (4) in which the metal is substituted with an alkali metal. Furthermore, compounds represented by the following general formula (5) can also be used as Al-Li hydrotalcites.

[0078]

[0079] Here, in general equation (4), y1 and y2 are given by the following equations, 0 ≤ y² / y¹ < 10, 2 ≤ y¹ + y² ≤ 20 This represents a number that satisfies the condition expressed by , where p is 0 or a positive number.

[0080]

[0081] Here, in general formula (5), A q- represents a q-valent anion, and p represents 0 or a positive number. Furthermore, the carbonate anion in the above hydrotalcites may be partially substituted with other anions.

[0082] Hydrotalcites may be dehydrated of their crystal water, or they may be coated with higher fatty acids such as stearic acid, higher fatty acid metal salts such as alkali metal oleate, organic sulfonic acid metal salts such as alkali metal dodecylbenzenesulfonate, higher fatty acid amides, higher fatty acid esters, or waxes.

[0083] Hydrotalcites may be natural products or synthetic products. Known methods for synthesizing these compounds are described in Japanese Patent Publication No. 46-2280, No. 50-30039, No. 51-29129, No. 3-36839, No. 61-174270, No. 5-179052, and others. Furthermore, these hydrotalcites can be used without being limited by their crystal structure, crystal grain size, etc. The hydrotalcite content is not particularly limited; for example, it may be 0.001 to 5 parts by mass per 100 parts by mass of polyolefin resin.

[0084] Examples of antistatic agents include low-molecular-weight antistatic agents such as nonionic, anionic, cationic, or amphoteric surfactants, and high-molecular-weight antistatic agents such as polymer compounds. Examples of nonionic surfactants include polyethylene glycol-type nonionic surfactants such as higher alcohol ethylene oxide adducts, fatty acid ethylene oxide adducts, higher alkylamine ethylene oxide adducts, and polypropylene glycol ethylene oxide adducts; and polyhydric alcohol-type nonionic surfactants such as fatty acid esters of polyethylene oxide and glycerin, fatty acid esters of pentaerythritol, fatty acid esters of sorbitol or sorbitan, alkyl ethers of polyhydric alcohols, and aliphatic amides of alkanolamines. Examples of anionic surfactants include carboxylates such as alkali metal salts of higher fatty acids; sulfate esters such as higher alcohol sulfates and higher alkyl ether sulfates; sulfonates such as alkylbenzene sulfonates, alkyl sulfonates, and paraffin sulfonates; and phosphate esters such as higher alcohol phosphates. Examples of cationic surfactants include quaternary ammonium salts such as alkyltrimethylammonium salts. Examples of amphoteric surfactants include amino acid-type amphoteric surfactants such as higher alkylaminopropionates, and betaine-type amphoteric surfactants such as higher alkyldimethyl betaine and higher alkyldihydroxyethyl betaine. These may be included individually or in combination of two or more. The content of the low molecular weight antistatic agent is not particularly limited; for example, it may be 0.1 to 10 parts by mass per 100 parts by mass of the polyolefin resin.

[0085] Examples of polymeric antistatic agents include ionomers and block polymers with polyethylene glycol as the hydrophilic portion. Examples of ionomers include the ionomer described in Japanese Patent Publication No. 2010-132927. Examples of polymers with polyethylene glycol as the hydrophilic portion include the polyether ester amide described in Japanese Patent Publication No. 7-10989, the polymer consisting of polyolefin and polyethylene glycol described in U.S. Patent No. 6,552,131, and the polymer consisting of polyester and polyethylene glycol described in Japanese Patent Publication No. 2016-023254. These may be included individually or in combination of two or more. The content of the polymeric antistatic agent is not particularly limited; for example, it may be 3 to 60 parts by mass per 100 parts by mass of polyolefin resin.

[0086] Examples of fluorescent whitening agents include the benzoxazole compound CIFluorescent Brightener 184; the coumarin compound CIFluorescent Brightener 52; and the diaminostilbenndisulfonic acid compounds CIFluorescent Brightener 24, 85, and 71. These may be included individually or in combination of two or more. The amount of fluorescent whitening agent is not particularly limited; for example, it may be 0.00001 to 0.1 parts by mass per 100 parts by mass of polyolefin resin.

[0087] Examples of pigments include Pigment Red 1, 2, 3, 9, 10, 17, 22, 23, 31, 38, 41, 48, 49, 88, 90, 97, 112, 119, 122, 123, 144, 149, 166, 168, 169, 170, 171, 177, 179, 180, 184, 185, 192, 200, 202, 2 09, 215, 216, 217, 220, 223, 224, 226, 227, 228, 240, 254; Pigment Orange 13, 31, 34, 36, 38, 43, 46, 48, 49, 51, 52, 55, 59, 60, 61, 62, 64, 65, 71; Pigment Yellow 1, 3, 12, 13, 14, 16, 17, 20, 24, 55, 60, 73, 81, 83, 86, 93, 95, 97, 98, 100, 109, 110, 113, 114, 117, 120, 125, 126, 127, 129, 137, 138, 139, 147, 148, 150, 151, 152, 153, 154, 166, 168, 175, 180, 185; Pi Commercially available pigments such as pigment green 7, 10, 36; pigment blue 15, 15:1, 15:2, 15:3, 15:4, 15:5, 15:6, 22, 24, 29, 56, 60, 61, 62, 64; and pigment violet 1, 15, 19, 23, 27, 29, 30, 32, 37, 40, 50 can be used. These may be included individually or in combination of two or more. The pigment content is not particularly limited; for example, it may be 0.0005 to 3 parts by mass per 100 parts by mass of polyolefin resin.

[0088] Examples of dyes include azo dyes, anthraquinone dyes, indigoid dyes, triarylmethane dyes, xanthene dyes, alizarin dyes, acridine dyes, stilbene dyes, thiazole dyes, naphthol dyes, quinoline dyes, nitro dyes, indamine dyes, oxazine dyes, phthalocyanine dyes, and cyanine dyes. These may be included individually or in combination of two or more. The dye content is not particularly limited; for example, it may be 0.0005 to 3 parts by mass per 100 parts by mass of polyolefin resin.

[0089] The method for producing the resin composition of the present invention is not particularly limited and includes, for example, a dry blending method of polyolefin resin powder or pellets, a nucleating agent, and other additives as needed, or a melt-kneading method after dry blending. The nucleating agent and other additives may be added to the polyolefin resin at the same time or separately. The nucleating agent and other additives may also be added to the polyolefin resin as a masterbatch.

[0090] <Molded products> Next, the molded article of the present invention will be described. The molded article of the present invention is a molded article obtained by molding the resin composition of the present invention.

[0091] Examples of molded articles of the present invention include those in which the crystallinity of the resin component is sufficiently suppressed during manufacturing. More specifically, such molded articles include laminates obtained by laminating synthetic fibers, films, and resins onto a substrate made of woody or fibrous material.

[0092] The method for manufacturing the molded articles of the present invention is not particularly limited, and examples include injection molding, extrusion molding, blow molding, rotational molding, vacuum molding, inflation molding, calendering, slush molding, dip molding, and foam molding. Among these molding methods, extrusion molding and calendering are particularly preferred. [Examples]

[0093] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0094] (Experimental Examples 1-6 and Reference Example 1) <Confirmation of crystallization temperature when 0.2 parts by mass of nucleating agent are added to 100 parts by mass of polyolefin resin> The crystallization temperature of polyolefin resins was confirmed when 0.2 parts by mass of each of the following nucleating agents 1 to 6 were added to 100 parts by mass of the polyolefin resin. The following polyolefin resins, nucleating agents, antioxidants, and fatty acid metal salts were blended in the proportions shown in Table 1, mixed using a Henschel mixer, and then melt-kneaded and granulated at an extrusion temperature of 230°C using a twin-screw extruder (TEX-28V, manufactured by Japan Steel Works) to obtain resin composition pellets for Experimental Examples 1 to 6 and Reference Example 1. In Table 1, the unit of the blending amount of each component is parts by mass. The crystallization temperature of the obtained resin composition pellets was measured using the following procedure.

[0095] Polyolefin resin: Homopolypropylene with a melt flow rate of 7.7 g / 10 min at a cylinder temperature of 230°C and a load of 2.16 kg, melting point 160°C. Nuclear agent 1: Triazine compound No. 59, melting point 202.7°C Nuclear agent 2: Triazine compound No. 58, melting point 189.3°C Nuclear agent 3: Triazine compound No. 50, melting point 217.7°C Nuclear agent 4: Acetal compound of compound No. 60, melting point 274.8°C Nuclear agent 5: Acetal compound of compound No. 61, melting point 244.7°C Nuclear agent 6: Lithium 2,2'-methylenebis(4,6-diter-butylphenyl) phosphate, melting point above 400°C (no endothermic peak observed) Antioxidant 1: Tetrakis[methylene-3-(3',5'-diter-butyl-4'-hydroxyphenyl)propionate]methane Antioxidant 2: Tris(2,4-di-tert-butylphenyl) phosphite Fatty acid metal salts: Calcium stearate The "melting point" of the nucleation agent is the temperature (°C) of the endothermic peak observed when the nucleation agent is heated from 50°C to 400°C at a rate of 10°C / min under a nitrogen atmosphere using a differential scanning calorimetry system (Diamond, PerkinElmer).

[0096] <Crystallization temperature> The obtained resin composition pellets were finely crushed, and 5 mg of each was placed in an aluminum pan. The crystallization temperature was measured using a differential scanning calorimetry device (Diamond, PerkinElmer). The crystallization temperature was determined as the temperature (°C) of the exothermic peak observed during the cooling process when the temperature was raised from 50°C to 230°C at a rate of 10°C / min, held for 5 minutes, and then cooled to 50°C at a rate of 10°C / min. The results are shown in Table 1.

[0097] [Table 1]

[0098] As shown in Table 1, the crystallization temperatures of the resin compositions in Experimental Examples 1 to 6 were 7°C or more higher than those of the resin composition in Reference Example 1. Therefore, nucleating agents 1 to 6 were effective in raising the crystallization temperature of polyolefin resins by 7°C or more when added at a rate of 0.2 parts by mass per 100 parts by mass of polyolefin resin.

[0099] (Examples 1-10, Comparative Examples 1-7) <Preparation and Characterization of Resin Compositions> Polyolefin resin, nucleating agent, antioxidant, and fatty acid metal salt were blended in the proportions shown in Tables 2 to 4. After mixing using a Henschel mixer, the mixture was melt-kneaded at an extrusion temperature of 230°C using a twin-screw extruder (TEX-28V, manufactured by Japan Steel Works) and granulated to obtain resin composition pellets of Examples 1 to 10 and Comparative Examples 1 to 7. In Tables 2 to 4, the unit of the blending amount of each component is parts by mass. Furthermore, the crystallization temperature of the obtained resin composition pellets was measured using the same procedure as in Experimental Example 1. The results are shown in Tables 2 to 4.

[0100] [Table 2]

[0101] [Table 3]

[0102] [Table 4]

[0103] (Examples 11-12, Comparative Example 8) Polyolefin resin, nucleating agent, antioxidant, and fatty acid metal salt were blended in the proportions shown in Table 5 and mixed using a Henschel mixer. The mixture was then melt-kneaded and granulated using a twin-screw extruder (Laboplastmill Micro, manufactured by Toyo Seiki Seisakusho) at an extrusion temperature of 230°C to obtain resin composition pellets for Examples 11-12 and Comparative Example 8. In Table 5, the unit of the blending amount of each component is parts by mass. The obtained resin composition pellets were melt-compressed using a 50t press at 230°C, 10MPa, and 5min to obtain a square sheet with a side length of 10cm and a thickness of 1.0mm. A disc-shaped test piece with a diameter of 25mm was cut from the obtained sheet, and the flow field crystallization temperature of this test piece was measured using the following procedure.

[0104] First, the above test specimen was placed in a rotary rheometer (DHR2, TA Instruments Co., Ltd.) equipped with a 25 mm diameter parallel plate, heated at 200°C for 3 minutes under a nitrogen atmosphere, and then the gap was set to 0.9 mm to remove excess resin. Next, dynamic viscoelasticity measurements were performed by setting the apparatus to a strain of 1%, an angular velocity of 1 rad / s, a starting temperature of 200°C, and a cooling temperature of 5°C / min. The complex viscosity value η*(Pa·s) obtained from the measurement was then plotted against the measurement temperature (°C). Figure 1 shows a graph plotting η*(Pa·s) against the measurement temperature (°C) for the resin composition of Example 12. Here, the vertical axis in Figure 1 is on a common logarithmic scale. As shown in Figure 1, the slope of the tangent line on the graph changes significantly before and after the temperature at which the resin component crystallizes. Tangent lines were drawn at the point immediately before and immediately after the point where the slope of the tangent line changed significantly. The temperature corresponding to the intersection of these two tangent lines was defined as the flow-field crystallization temperature TC (°C), and this was used as an indicator of the crystallinity of the resin component in the flow field. Similar graphs were created for the resin compositions of Example 11 and Comparative Example 8, and the flow-field crystallization temperature TC was determined. The results are shown in Table 5.

[0105] [Table 5]

[0106] As shown in Tables 2 to 4, the resin compositions of Examples 1 to 10 had lower crystallization temperatures and suppressed crystallinity of the resin components compared to the resin composition of Comparative Example 7. On the other hand, the resin compositions of Comparative Examples 1 to 6 had higher crystallization temperatures and did not exhibit suppressed crystallinity of the resin components compared to the resin composition of Comparative Example 7. Furthermore, as shown in Table 5, the resin compositions of Examples 11 and 12 had lower flow field crystallization temperatures (TC) and suppressed crystallinity of the resin components compared to the resin composition of Comparative Example 8.

[0107] From the above, it has been confirmed that the resin composition of the present invention has suppressed crystallinity of the resin components.

Claims

1. A resin composition comprising a polyolefin resin and a nucleating agent, The nucleating agent is a nucleating agent that melts at a temperature 150°C higher than the melting point of the polyolefin-based resin, or a nucleating agent that dissolves in the polyolefin-based resin at a temperature 150°C higher than the melting point of the polyolefin-based resin, and the nucleating agent is a nucleating agent that, when added in an amount of 0.2 parts by mass per 100 parts by mass of the polyolefin-based resin, increases the crystallization temperature of the polyolefin-based resin by 7°C or more; A resin composition characterized in that the content of the nucleating agent is 0.005 parts by mass or more but less than 0.1 parts by mass per 100 parts by mass of the polyolefin-based resin.

2. 2. The resin composition according to claim 1, wherein the melting point of the nucleating agent is 150 to 300°C.

3. 3. The resin composition according to claim 1, wherein the nucleating agent comprises a triazine compound represented by the following general formula (1): (In general formula (1), Ar 1 , Ar 2 and Ar 3 each independently represents a substituted or unsubstituted phenyl group.

4. 3. The resin composition according to claim 1, wherein the nucleating agent comprises an acetal compound represented by the following general formula (2): (In general formula (2), R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R 2 , R 3 , R 4 and R 5 each independently represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, or R 2 and R 3 or R 4 and R 5 are linked together to form an alkylene group having 3 to 6 carbon atoms or an alkylenedioxy group having 1 to 4 carbon atoms, and X represents a single bond, a -CH(OH)- group, or a -CH(OH)CH(OH)- group.

5. A molded article obtained by molding the resin composition according to any one of claims 1 to 4.

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