JP2005255757A - Thermoplastic resin composition and its molded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition which is excellent in processability, workability, scratch resistance, abrasion resistance, heat resistance, designability (matte external appearances) and the like, gives a molded product having a surface characteristic of a small coefficient of sliding friction, has a high mechanical strength and a high elongation, and particularly is excellent in tensile strength at high temperatures and extensibility in a semi-molten state and suitable for the manufacture of a molded product of a complicated shape or a fabricated molded product. <P>SOLUTION: The thermoplastic resin composition comprises 60-96.7 pts. wt. of an ethylene ionomer (A), 0.3-10 pts. wt. of a copolymer (B) of ethylene with a glycidyl monomer, and 3-30 pts. wt. of a polyolefin (C), the total of the components (A), (B) and (C) being 100 pts. wt., where the ethylene ionomer (A) comprises an ethylene-(meth)acrylic acid copolymer and an ethylene-(meth)acrylic acid-(meth)acrylic ester copolymer as a base resin and contains at least two metal species as an ion source. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention can produce a molded article having excellent surface properties such as workability, workability, scratch resistance, abrasion resistance, heat resistance, designability (matte appearance), etc., and a small sliding friction coefficient. The present invention relates to a possible thermoplastic resin composition and a molded body thereof. Thermoplastic resin composition and its molded body, which are particularly excellent in both mechanical strength and elongation, particularly excellent in tensile strength at high temperature and stretchability in a semi-molten state, and suitable for the production of complex shaped molded bodies and secondary processed molded bodies. About.

  The applicant has already proposed a thermoplastic resin composition comprising an ethylene ionomer, an α-olefin / glycidyl monomer copolymer and a polyolefin (see, for example, Patent Document 1). The resin composition according to this proposal is excellent in processability, workability, scratch resistance, abrasion resistance, heat resistance, designability, etc., and can produce a molded article having a surface characteristic with a small sliding friction coefficient. It can be used for various purposes such as building materials and automobile interior parts. When molding such products with profile extrusion or other complicated shapes using such resin compositions, or when obtaining molded products with complicated shapes by secondary processing such as vacuum forming or pressure forming, etc. There has been a demand for a material that can produce a molded product that is strong and has a large elongation, a refined, and excellent surface condition with good production.

JP 2001-261906 A

  Accordingly, the present inventors have studied to obtain a material having high strength and high elongation while maintaining the excellent characteristics of the thermoplastic resin composition in the above proposal, and as a result, a plurality of specific types of ethylene-based ionomers. It was found that it is effective to use together. Accordingly, an object of the present invention is to provide a thermoplastic resin composition having an excellent balance between mechanical strength and tensile elongation and excellent workability, workability, scratch resistance, wear resistance, heat resistance, designability, etc. There is to do.

  That is, according to the present invention, ethylene ionomer (A) 60-96.7 parts by weight, ethylene-glycidyl monomer copolymer (B) 0.3-10 parts by weight and polyolefin (C) 3-30 parts by weight ( The ethylene ionomer (A) comprises at least one ethylene / (meth) acrylic acid copolymer of 10 to 90% by weight and at least one ethylene / (meth) acrylic acid / ( A heat characterized by having a mixed component of 90 to 10% by weight of a (meth) acrylate copolymer as a base resin and a neutralization degree of 20 to 90% including two or more metal species as an ion source. A plastic resin composition is provided.

  According to the present invention, a molded article having excellent surface properties such as workability, workability, scratch resistance, abrasion resistance, heat resistance, designability (matte appearance), etc., and a small coefficient of sliding friction is produced. It is possible to provide a thermoplastic resin composition that can be used. Such a resin composition is particularly suitable for use as a molded article with expansion and contraction because both the mechanical strength (tensile strength) and the tensile elongation (elongation at break) are large. In particular, since it is excellent in tensile strength at high temperature and stretchability in a semi-molten state, it can cope with processing of a molded body having a complicated shape and is excellent in formability in secondary processing. For example, a thermoplastic resin composition having a tensile strength measured in accordance with JIS K6760 of 30 MPa or more, an elongation at break of 350% or more, and a softening temperature of 65 ° C. or more can be easily obtained. Therefore, not only general extrusion molding, injection molding, hollow molding, compression molding, etc., but also in the case of obtaining a molded body having a complicated shape by secondary molding such as profile extrusion molding, vacuum molding, pressure molding, etc. A molded object can be manufactured easily. For example, profile extrusion moldings, hollow pipe-shaped moldings, pipes for fluid transportation such as gas and water and sewage, industrial balloons, gathers, telescopic pipes, joints, elastic cords, mechanical belts, flooring materials, automotive interior materials, It can be used as a surface layer sheet such as a veneer, a steel plate, a building material, a signboard, a sheet-like molded body such as a curtain, a partition sheet, or an industrial sheet, or a skin thereof, a vacuum / pressure-air molded body, or a skin material thereof.

  The ethylene ionomer (A) used in the present invention comprises at least one ethylene / (meth) acrylic acid copolymer and at least one ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer. It is a mixed component containing two or more metal species as a base resin and as an ion source. Here, (meth) acrylic acid means acrylic acid or methacrylic acid, and (meth) acrylic acid ester means acrylic acid ester or methacrylic acid ester.

  Such ethylene-based ionomers (A) include, for example, (1) an ethylene / (meth) acrylic acid copolymer ionomer using a metal as an ion source and an ethylene / (meth) acrylic using a different metal as the ion source. Method of blending ionomer of acid / (meth) acrylic acid ester copolymer, (2) of ethylene / (meth) acrylic acid copolymer and ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer A method of co-ionizing a blend with two or more metal species; (3) an ethylene (meth) acrylic acid copolymer ionomer (or ionomer mixture) and ethylene (meta) using two or more metals as an ion source; ) Method of blending ionomer of acrylic acid / (meth) acrylic acid ester copolymer, (4) Ethylene / (meth) acrylic It can be obtained by a method of blending an ionomer of a copolymer and an ionomer (or an ionomer mixture) of an ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer using two or more kinds of metals as an ion source. . Of course, it is also possible to obtain the ethylene ionomer (A) by many modifications utilizing the above method.

  The ethylene / (meth) acrylic acid copolymer which is one of the base polymers of the ethylene ionomer (A) has a (meth) acrylic acid content of 2 to 30% by weight, preferably 3 to 25% by weight, and more preferably. Is preferably 5 to 20% by weight. Also, those having a melt flow rate of 1 to 1000 g / 10 min, particularly 2 to 800 g / 10 min under a load of JIS K7210-1999, 190 ° C. and 2160 g can be suitably used. The ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer as the other base polymer has an ethylene content of 50 to 98% by weight, preferably 60 to 95% by weight, and more preferably 70 to 90% by weight, (meth) acrylic acid content 1-30% by weight, preferably 2-25% by weight, more preferably 3-20% by weight, (meth) acrylic acid ester content 1-30% by weight, preferably A polymerization composition of 2 to 25% by weight, more preferably 3 to 20% by weight is preferred. Also, those having a melt flow rate of 1 to 1000 g / 10 min, particularly 2 to 800 g / 10 min under a load of JIS K7210-1999, 190 ° C. and 2160 g can be suitably used. The (meth) acrylic acid ester in the latter copolymer includes methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, methacrylic acid Examples thereof include ethyl, isobutyl methacrylate, and n-butyl methacrylate, and alkyl esters of acrylic acid having about 1 to 8 carbon atoms are particularly preferable. As the base polymer, two or more types having different polymerization compositions and melt flow rates may be used. In the present invention, the ethylene ionomer (A) is based on the base polymer, and the proportion of the ethylene / (meth) acrylic acid copolymer and the ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer used is 10/90 to 90/10, preferably 20/80 to 80/20 are used. Each of the above base polymers can also be prepared by radical copolymerization under high temperature and high pressure.

  As the ethylene ionomer (A) of the present invention, a mixed component of an ethylene / (meth) acrylic acid copolymer and an ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer in the above proportion as a base polymer. In addition to being used, an ion source having a neutralization degree of 20 to 90% containing two or more metal species is used. As the metal species, for example, two or more species selected from alkali metals such as lithium, sodium, potassium, rubidium and cesium, and divalent metals such as magnesium, calcium, barium and zinc can be used. Among these, it is preferable to use an alkali metal and a divalent metal in combination, and a combination of sodium and zinc is particularly preferable. In the ethylene ionomer (A), the degree of neutralization of all the carboxyl groups of the ethylene / (meth) acrylic acid copolymer and the ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer in the base polymer ( The average neutralization degree) is 20 to 90%, preferably 30 to 85%. When an alkali metal and a divalent metal are used as the ion species, the ratio of the atomic ratio (alkali metal / divalent metal) of 1/25 to 25/1, particularly 1/20 to 20/1, It is preferable to do this. The ethylene ionomer (A) also has a melt flow rate of 0.01 to 100 g measured by JIS K7210-1999, 190 ° C., 2160 g load in consideration of moldability, mechanical properties, miscibility with other components, and the like. / 10 minutes, in particular 0.1 to 50 g / 10 minutes are preferred. As the ethylene ionomer (A), two or more base polymers are used as described above, and by using two or more kinds of such metal species, both the tensile strength and the tensile elongation are large, and in a semi-molten state. A resin composition excellent in stretchability can be obtained.

  Even if the copolymer (B) of ethylene and glycidyl monomer used in the present invention is a binary copolymer consisting only of ethylene and glycidyl monomer, in addition to ethylene and glycidyl monomer, other monomers It may be a copolymerized multi-component copolymer. Typical examples of the glycidyl monomer in the copolymer (B) include glycidyl (meth) acrylate and unsaturated glycidyl ether. More specifically, glycidyl acrylate, glycidyl methacrylate, vinyl glycidyl ether, allyl glycidyl ether, 2-methylallyl glycidyl ether and the like can be mentioned.

  Specific examples of other monomers optionally copolymerized with a copolymer of ethylene and the above glycidyl monomer include vinyl acetate, vinyl esters such as vinyl propionate, methyl acrylate, ethyl acrylate, and isopropyl acrylate. , Unsaturated carboxylic acid esters such as isobutyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, dimethyl maleate, diethyl maleate Etc. can be illustrated.

  As the copolymer (B) of ethylene and glycidyl monomer, ethylene is 50 to 99% by weight, particularly 52 to 98% by weight, glycidyl monomer is 0.5 to 20% by weight, particularly 1 to 18% by weight, The monomer is preferably copolymerized in a proportion of 0 to 49.5% by weight, preferably 0 to 40% by weight. If the glycidyl monomer content is too low, the increase in softening temperature, heat resistance, and improvement in anti-glare properties are not significant, while if the amount is too high, the reaction with the ionomer becomes too strong and the resin viscosity increases rapidly. The composition may rise and become difficult to mold, or may cause problems such as gel formation in the composition. Such a copolymer may be a random copolymer or a graft copolymer, but in general, a random copolymer is used in view of the uniformity of reaction with the ethylene ionomer (A). Is preferred. Such a random copolymer can be obtained, for example, by radical copolymerization under high temperature and high pressure.

  As the ethylene / glycidyl monomer copolymer (B), JIS K7210-1999, 190 ° C., melt flow rate at 2160 g load is 0.01 to 1000 g / 10 min, particularly 0.1 to 200 g / 10 min. Is preferably used.

  In the present invention, the polyolefin (C) is used together with the ethylene ionomer (A) and the ethylene / glycidyl monomer copolymer (B). By using such a polyolefin (C), dispersibility with other components is excellent, softening temperature is high, design properties, heat resistance, abrasion resistance, scratch resistance, antifouling properties, mechanical strength, etc. It is possible to easily obtain an excellent resin composition.

  Polyolefin (C) is ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, etc. It is a homopolymer of α-olefin or a copolymer of two or more of these, and those produced by various methods using various catalysts can be used. More specifically, medium / high density polyethylene, high pressure process low density polyethylene, linear low density polyethylene, linear ultra-low density polyethylene and other ethylene polymers, polypropylene, poly-1-butene, poly-4-methyl- Examples include 1-pentene. Among these, it is preferable to use an ethylene polymer in view of moldability and tensile elongation (elongation at break).

When the ethylene polymer is a copolymer of ethylene and another α-olefin, the copolymer component is preferably an α-olefin having 3 to 20 carbon atoms, particularly 4 to 10 carbon atoms. Further, in a linear low density polyethylene having a density (JIS K7112 D method) of 900 to 960 kg / m ³ and a linear ultra-low density polyethylene having a density of less than that, it comprises a highly active titanium catalyst component and an organoaluminum compound catalyst component. Products manufactured using various catalyst systems such as multisite catalyst systems, catalyst systems composed of vanadium compound catalyst components and organoaluminum compound catalyst components, and catalyst systems composed of metallocene catalyst components and aluminoxane can be used. . Among these, the dispersibility with other components is excellent, and a resin composition excellent in design properties, heat resistance, abrasion resistance, scratch resistance, mechanical strength, etc. can be easily obtained. As a part, preferably a copolymer of ethylene and other α-olefins having a density of 920 kg / m ³ or more, more preferably 925 kg / m ³ or more, preferably 30% by weight or more, more preferably 50% by weight or more is used. Is preferred. In the case of an ethylene polymer, in consideration of moldability, product strength, and the like, the melt flow rate at JIS K7210-1999, 190 ° C. and 2160 g load is 0.01 to 100 g / 10 min, particularly 0.1 to 50 g / min. It is preferable to use a thing of about 10 minutes.

  As the polypropylene that can be used as the polyolefin (C), a propylene homopolymer, a random copolymer of propylene and another α-olefin, a block copolymer of propylene and another α-olefin, and the like can be used. Among these, in consideration of miscibility with other components, it is preferable to use a random or block copolymer of propylene and another α-olefin. In the propylene copolymer, it is preferable to use ethylene alone or a combination of ethylene and an α-olefin having about 4 to 8 carbon atoms as another α-olefin to be copolymerized with propylene. Such polypropylene (C) can be produced in the presence of a stereospecific catalyst. In view of molding processability, product strength, etc., polypropylene with a melt flow rate of 0.01 to 100 g / 10 min, particularly about 0.1 to 50 g / 10 min at 2160 g load is used. It is preferable to do this.

  The blending ratio of each component (A), (B), (C) in the thermoplastic resin composition of the present invention is such that the ethylene ionomer (A) is 60 to 96. 7 parts by weight, ethylene / glycidyl monomer copolymer (B) is 0.3 to 10 parts by weight, polyolefin (C) is 3 to 30 parts by weight, preferably (A) is 73 to 95.5 parts by weight, (B ) Is 0.5-7 parts by weight, (C) is 4-20 parts by weight, more preferably (A) is 81-94 parts by weight, (B) is 1-4 parts by weight, and (C) is 5-15. It is the ratio which becomes a weight part. By appropriately selecting the type of each component (A), (B), and (C) and the blending ratio thereof, the tensile strength measured in accordance with JIS K6760 is 30 MPa or more, the elongation at break is 350% or more, A thermoplastic resin composition having a softening temperature of 65 ° C. or higher can be easily obtained.

  The thermoplastic resin composition of the present invention can be obtained by melt-mixing an ethylene ionomer (A), an ethylene / glycidyl monomer copolymer (B), and a polyolefin (C). In melt mixing, a normal mixing device such as a screw extruder, a roll mixer, a Banbury mixer, or the like can be used. Melt mixing can be carried out by blending the above three components at the same time, but the most preferable method is to melt and mix (B) and (C) in advance and (A). According to this method, since (B) is diluted to (C) and the reaction with (A) does not occur locally and becomes uniform, a composition having excellent properties can be obtained with good quality stability. There is an advantage that it can be manufactured. If (A) and (B) are first melt-mixed and then (C) is mixed, gelation may occur due to a local reaction.

  Other polymers and various additives can be blended with the resin composition of the present invention within a range not impairing the object of the present invention. Examples of additives include antioxidants, heat stabilizers, light stabilizers, UV absorbers, pigments, dyes, lubricants, antiblocking agents, antistatic agents, antifungal agents, antibacterial agents, flame retardants, flame retardant aids , Crosslinking agents, crosslinking aids, foaming agents, foaming aids, inorganic fillers, fiber reinforcements and the like.

  The resin composition of the present invention can be formed into molded bodies having various shapes by various molding methods such as extrusion molding, injection molding, compression molding, and hollow molding. For example, a molded body such as a sheet or film formed using an inflation film molding machine or a cast film sheet molding machine is obtained in a silky shape, and has excellent wear resistance and scratch resistance, and is resin when stretched or bent. While maintaining the characteristics of the ionomer that there is no whitening, it has excellent characteristics such as rigidity, surface hardness, antifouling properties, and design (matte appearance). Such a molded body such as a sheet or film may be a single layer, and an adhesive resin and a co-extruded laminate can be formed by a co-extrusion molding machine in order to improve the adhesion to various substrates.

  Since the resin composition of the present invention has a good balance between mechanical strength (tensile strength) and tensile elongation (elongation at break), it is suitable for use in molded articles with stretchability. Moreover, the softening temperature is high, the tensile strength at high temperature is excellent, and the uniform stretchability in the semi-molten state is good. For this reason, it is possible to cope with processing of a molded body having a complicated shape such as profile extrusion molding, and it is excellent in formability in secondary processing such as vacuum forming and pressure forming.

  When forming the above coextruded laminate, the adhesive resin that can be laminated with the resin composition of the present invention is an ethylene / unsaturated carboxylic acid copolymer, an ethylene / unsaturated carboxylic acid / unsaturated carboxylic acid alkyl ester, Ternary copolymer, ethylene / unsaturated carboxylic acid alkyl ester copolymer, ethylene / vinyl ester copolymer, ethylene / unsaturated carboxylic acid alkyl ester / carbon monoxide copolymer, or unsaturated carboxylic acid graft thereof As a representative example, a single substance or a blend consisting of a plurality of substances selected from those can be given.

  A single-layer sheet comprising the resin composition of the present invention or a multilayer sheet comprising the above-mentioned adhesive resin as an inner layer is formed by thermal lamination molding, hot roll molding, hot press molding, dry lamination (adhesive coating). The laminate can be formed by laminating on the surface of another substrate by a known molding method such as Examples of such base materials include paper or printing paper, various metal foils, various metal plates such as steel plates, woody materials such as wood or plywood, polyolefin films / sheets / molded products such as polyethylene, polypropylene, TPO, or the like. And various filler blends, PVC sheets / tiles, woven fabrics and non-woven fabrics.

  Another example of extrusion molding of the resin composition of the present invention is a method of forming a laminate by thermally bonding to another substrate surface using an extrusion coating molding machine. Examples of such a substrate include various metal plates such as paper, various metal foils and steel plates, polyolefin film sheets, woven fabrics and non-woven fabrics. In the case of extrusion coating molding, as shown in the examples below, by controlling the MFR and blending ratio of each resin component constituting the resin composition of the present invention, extrusion moldability, abrasion resistance, and scratch resistance It is possible to balance surface characteristics such as stickiness and matte appearance.

  When laminating the resin composition of the present invention on the surface of another substrate by an extrusion coating molding machine, it may be a single layer, or in order to improve the adhesion to various substrates, it is adhesive by a coextrusion coating molding machine. It can be formed via a resin layer. As such an adhesive resin, a single substance or a blend of any plural kinds selected from the aforementioned various ethylene copolymers or an unsaturated carboxylic acid graft product thereof can be given as a representative example.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples. In addition, the composition and physical properties of the raw materials used in the examples and comparative examples and the physical property evaluation methods of the obtained resin compositions are as follows.

1. Raw Material (1) Ionomer Ionomer A: an ionomer having an methacrylic acid (MAA) content of 10% by weight and an ethylene / methacrylic acid copolymer (EMAA) having a zinc neutralization degree of 80%, a melt flow rate (MFR) (JIS K7110-1999, 190 ° C., 2160 g load, the same applies hereinafter): 1.0 g / 10 min. Ionomer B: ethylene / methacrylic acid / isobutyl acrylate copolymer (EMAAiBA) having a MAA content of 10% by weight and an isobutyl acrylate (iBA) content of 10% by weight. Ionomer with a zinc neutralization degree of 70%, MFR: 1.0 g / 10 min. Ionomer C: ionomer with 53% sodium neutralization degree of EMAA with MAA content of 9% by weight, MFR: 0.45 g / 10 min. Ionomer D: MAA Of EMAAiBA with a content of 10% by weight and an iBA content of 10% by weight Thion neutralization degree 36% ionomer, MFR: 1.0 g / 10 min. Ionomer E: MAA content 15% by weight EMAA zinc neutralization degree 59% ionomer, MFR: 0.9 g / 10 min. Ionomer F: MAA content 10% by weight EMAA ionomer with 54% sodium neutralization, MFR: 0.9 g / 10 min

(2) Ethylene / glycidyl monomer copolymer master batch EnBAGMA-MB: Melt blend of 20 parts by weight of the following EnBAGMA and 80 parts by weight of the following m-LLDPE EnBAGMA: n-butyl acrylate content of 28% by weight, glycidyl methacrylate content of 5% by weight Ethylene / n-butyl acrylate / glycidyl methacrylate copolymer, MFR: 12 g / 10 min (3) Polyolefin m-LLDPE: linear low density polyethylene produced using a metallocene catalyst, trade name: Evolue SP1540 (Mitsui (Manufactured by Chemical Co., Ltd.), density: 913 kg / m ³ , MFR: 3.8 g / 10 min LLDPE: linear low density polyethylene, trade name: Ultozex 3021F (manufactured by Mitsui Chemicals), density: 930 kg / m ^3, MFR: 2.1g / 0 minutes

2. Physical property evaluation method (1) MFR: measured in accordance with JIS K7210-1999 at 190 ° C. under a load of 2160 g (2) Tensile test: tensile strength and tensile elongation (elongation at break) in accordance with JIS-K6760 (3) Flexural rigidity: measured in accordance with JIS K7106 (4) Hardness: Shore D hardness measured in accordance with JIS K7125 (5) Softening temperature: Vicat softened temperature measured in accordance with JIS K6760 (6) High-temperature tensile test: The atmosphere was adjusted to 80 ° C. with an autograph manufactured by Shimadzu Corporation equipped with a constant temperature and humidity chamber, and a test piece was set and allowed to stand for 10 minutes. Under the same atmosphere, JIS K6760 Measures tensile strength and tensile elongation according to

[Examples 1-3, Comparative Examples 1-3]
After each material was dry-blended at the blending ratio shown in Table 1, it was melt-extruded using a single screw extruder of 60 mmφ, L / D = 32, tip dull screw type, at a processing temperature of 210 ° C. and a screw rotation speed of 50 rpm. Thus, a resin composition was obtained. The MFR of the resin composition was measured under the above conditions. Next, using this resin composition, 180 ° C. × 3 minutes × low contact pressure → 180 ° C. × 3 minutes × 9.8 MPa (100 kg / cm ² ) → 20 ° C. × 3 minutes × 14.7 MPa (150 kg / cm ² ) A press sheet was prepared under the conditions described above and its physical properties were evaluated. The results are shown in Table 1.

Claims (7)

  It consists of ethylene ionomer (A) 60-96.7 parts by weight, copolymer of ethylene and glycidyl monomer (B) 0.3-10 parts by weight and polyolefin (C) 3-30 parts by weight (total 100 parts by weight). The ethylene ionomer (A) is composed of 10 to 90% by weight of at least one ethylene / (meth) acrylic acid copolymer and at least one ethylene / (meth) acrylic acid / (meth) acrylic acid ester copolymer. A thermoplastic resin composition having a neutralization degree of 20 to 90% including a mixed component of 90 to 10% by weight as a base resin and two or more metal species as an ion source.   The thermoplastic resin composition according to claim 1, wherein the metal species of the ethylene ionomer (A) is at least one alkali metal and at least one divalent metal.   The thermoplastic resin composition according to claim 2, wherein the atomic ratio of the alkali metal to the divalent metal (alkali metal / divalent metal) is 1/25 to 25/1.   The thermoplastic resin composition according to claim 2 or 3, wherein the alkali metal is sodium and the divalent metal is zinc. The thermoplastic resin composition according to claim 1, wherein at least a part of the polyolefin (C) is an ethylene / α-olefin copolymer having a density (JIS K7112 D method) of 920 kg / m ³ or more.   The thermoplastic resin composition according to claim 1, which has a tensile strength measured in accordance with JIS K6760 of 30 MPa or more, an elongation at break of 350% or more, and a softening temperature of 65 ° C. or more.   The molded object which consists of a thermoplastic resin composition of Claims 1-6.