JP5152590B2 - Polyarylene sulfide resin composition and resin molded body thereof - Google Patents

Description

  The present invention relates to a polyarylene sulfide resin composition, and also relates to a resin molded body comprising the polyarylene sulfide resin composition. Furthermore, it is related with the metal insert component which insert-molded the metal component using the said resin composition.

  Polyarylene sulfide resin (hereinafter referred to as “PAS resin”) has excellent heat resistance, chemical resistance, flame retardancy, rigidity, and mechanical properties. As so-called engineering plastics, Widely used in automobile parts, machine parts, structural parts, etc. Conventionally, PAS resins have been used with the addition of fibrous reinforcing agents such as inorganic fillers in order to compensate for the drawback of being brittle with poor toughness, especially ductility. It was unsuitable for such use. In particular, in metal insert parts in which metal parts are insert-molded into PAS resin, there is a problem that due to the occurrence of stress strain, the adhesion between the PAS resin and the metal is reduced or the PAS resin is cracked. It was.

  Therefore, a terpene unit, an N-substituted maleimide unit, a dicyclopentadiene unit with respect to an olefin copolymer segment composed of an α-olefin unit and an α, β-unsaturated glycidyl ester unit in a linear PAS resin. Alternatively, a resin composition containing a graft copolymer in which a polymer segment composed of indene units is chemically bonded in a branched or crosslinked structure and an inorganic filler has been proposed as a resin composition for metal insert parts (for example, , See Patent Documents 1 to 4.) However, these resin compositions contain a relatively large amount of glass fiber as a fibrous reinforcing agent at 30 to 70% by mass with respect to the resin component as an inorganic filler. If the material is reinforced with glass fiber, stress is concentrated in applications that are used in high temperature environments of 100 ° C or higher, or in environments where temperature changes are severe. There arises a problem that the mechanical strength is insufficient.

  Therefore, it has a sufficient mechanical strength even in a high temperature environment or an environment where the temperature change is severe, and when used in a metal insert part, the adhesion between the PAS resin and the metal is reduced, There is a need for a material that does not crack the resin.

JP-A-11-293108 JP-A-11-335556 JP-A-11-335557 JP 2000-7915 A

  An object of the present invention is to provide a PAS resin composition having a sufficient mechanical strength even in a high-temperature environment and also in an environment where the temperature change is severe, and suitable for metal insert parts. It is to provide a resin molded body and a metal insert part used.

  As a result of intensive studies, the inventors of the present invention have obtained a resin composition obtained by blending a specific amount of metal fine particles with a PAS resin having a specific molecular weight, and a right angle at 150 ° C. in a 4 mm-thick molded product in accordance with JIS K7128-3. A PAS resin composition having a specific range of tensile creep strain at 150 ° C., 10 MPa, 20 hours in ASTM No. 4 dumbbell 1.6 mm thick molded product in accordance with ASTM D2990, in accordance with ASTM D2990, in a high temperature environment, Furthermore, it has been found that it has sufficient mechanical strength even in an environment where the temperature change is severe and is suitable for metal insert parts.

  That is, the present invention provides at least one selected from polyarylene sulfide resin (A) having a peak molecular weight of 35,000 or more obtained by gel permeation chromatography and copper, nickel, zinc, cobalt, iron and manganese. A polyarylene sulfide resin composition containing metal fine particles (B) containing two metal species, wherein the mass content of the metal fine particles (B) in 100% by mass of the resin composition is in the range of 5 to 30% by mass. In a 4 mm thick molded product conforming to JIS K7128-3, the displacement at a right-angled tear breaking point at 150 ° C. is 8 mm or more, and 150 in an ASTM No. 4 dumbbell 1.6 mm thick molded product conforming to ASTM D2990. A polyary having a tensile creep strain of 5% or less at 20 ° C. at 10 ° C. A lensulfide resin composition is provided.

  The present invention also provides a resin molded body and a metal insert part using the polyarylene sulfide resin composition.

  Since the PAS resin composition of the present invention is excellent in mechanical strength even in a high temperature environment and also in an environment where the temperature change is severe, it can provide resin molded articles for a wide range of uses. In particular, in a metal insert part in which a metal part is insert-molded in a PAS resin composition, there is usually a problem in that the adhesiveness is reduced or the PAS resin composition is cracked due to the difference in thermal stress between the PAS resin composition and the metal. However, by using the PAS resin composition of the present invention, this problem can be solved and it can be suitably used. Specific applications include capacitor sealing plates, motor insulators, and various gears.

  The PAS resin (A) used in the present invention includes, for example, a random copolymer including a repeating unit having a structure in which an aromatic ring which may have a substituent and a sulfur atom are bonded, a block copolymer, and a mixture thereof. Or a mixture with a homopolymer is mentioned. Typical examples of these PAS resins include polyphenylene sulfide (hereinafter referred to as “PPS resin”). Among these PPS resins, those having a structure in which the bond of the above repeating unit to the aromatic ring is in the para position are preferable in terms of heat resistance and crystallinity.

  The PAS resin may have a meta bond, an ether bond, a sulfone bond, a sulfide ketone bond, a biphenyl bond, a phenyl sulfide bond, or a naphthyl bond. However, this ratio is preferably less than 10 mol%, and is preferably 5 mol% or less when a component having a trifunctional or higher bond is copolymerized. This is because, in the present invention, the sulfide bond (-S-) in which the bond to the aromatic ring of the repeating unit is in the para position has a coordination bond interaction with the metal fine particles described later, This is because it is considered that when the bond such as a meta bond or an ether bond is lower than a certain ratio, this interaction becomes stronger and higher mechanical strength can be obtained.

  The PAS resin (A) used in the present invention has a peak molecular weight of 35,000 or more as determined by gel permeation chromatography using 1-chloronaphthalene as a solvent, but has a peak molecular weight of 38,000 or more. The peak molecular weight is more preferably in the range of 40,000 to 45,000. When the peak molecular weight of the PAS resin is within this range, a sufficient mechanical strength can be obtained in the resin molded body made of the PAS resin composition of the present invention.

  In addition, the peak molecular weight in this invention is based on the numerical value calculated | required as a polystyrene conversion amount, using polystyrene as a standard substance in the gel permeation chromatograph measurement of the Example mentioned later. While the number average molecular weight and weight average molecular weight change depending on how the baseline of the molecular weight distribution curve of gel permeation chromatography is taken, the peak molecular weight depends on how the baseline of the molecular weight distribution curve is taken. Is not.

The melt viscosity used in the present invention is preferably in the range of 100 to 1000 Pa · s, with a viscosity at 300 ° C. and a shear rate of 500 sec ⁻¹ , measured using a cavity rheometer, of 200 to 500 Pa · s. A range is more preferable. When the melt viscosity of the PAS resin is within this range, sufficient mechanical strength can be obtained in the PAS resin composition of the present invention.

  The production method of the PAS resin (A) is not particularly limited. For example, 1) a method in which a dihalogenoaromatic compound and, if necessary, other copolymerization components are polymerized in the presence of sulfur and sodium carbonate, 2) A method of polymerizing dihalogenoaromatic compounds and other copolymerization components as required in the presence of a sulfidizing agent in a polar solvent, 3) p-chlorothiophenol, and other as required And 4) a method of reacting a sulfidizing agent, a dihalogenoaromatic compound, and, if necessary, another copolymer component in an organic polar solvent.

  Among these methods, the method 4) is versatile and preferable. In the reaction, an alkali metal salt of carboxylic acid or sulfonic acid or an alkali hydroxide may be added to adjust the degree of polymerization. Also, a hydrous sulfiding agent is introduced into the heated organic polar solvent and dihalogenoaromatic compound-containing mixture at a rate at which water can be removed from the reaction mixture, and the dihalogenoaromatic compound and the sulfiding agent are added in the organic polar solvent. A method of producing a PAS resin by reacting and controlling the amount of water in the reaction system in the range of 0.02 to 0.5 mol with respect to 1 mol of the organic polar solvent (see JP-A-07-228699). Is particularly preferred.

  The metal fine particles (B) used in the present invention contain at least one metal species selected from copper, nickel, zinc, cobalt, iron and manganese.

  The metal species contained in the metal fine particles (B) used in the present invention is a metal having an atomic number of 25 to 30 belonging to the fourth period, and the standard electrode potential (V) at 25 ° C. is −1.18 (manganese). It is the range of -0.377 (copper). Metals with standard electrode potentials in this range are mostly oxidized, with most of the surface remaining as simple metals, such as noble metals such as gold, silver, platinum, and palladium with standard electrode potentials of 0.79 or higher. Unlike the non-metals, there is almost an oxide film on the surface, but it is completely formed by an oxide layer with a strong surface, such as aluminum, titanium, zirconia, etc. whose standard electrode potential is -1.5 or less. Not covered.

  Although the outermost surface is generally oxidized as described above, the metal species is partially defective in oxidation, or the metal fine particles are rubbed with each other during physical stimulation, for example, a melting operation with a PAS resin. It is considered that the surface of the single metal is partially exposed due to damage to the surface of the mating metal species. From these facts, the metal fine particles containing the metal species have a moderate density in the PAS resin in which the single metal exposed portion partially present on the metal fine particles and the sulfide bond (-S-) of the PAS resin have an appropriate density. It is considered that the interaction between molecules of the PAS resin is formed while maintaining the flexibility. This bond is essentially different from covalent intermolecular crosslinking and does not develop brittleness, and is a bond stronger than van der Waals force, so flexibility is likely to develop due to appropriate crosslinking strength. Presumed.

  That is, the metal species acts in a coordinated manner with the unshared electron pair possessed by the sulfur atom of the sulfide bond (-S-) of the PAS resin, and the PAS resin molecular chain is gently restrained to crystallize the PAS resin. It is considered that the amorphous portion having high flexibility and elongation properties increases in the PAS resin, and the mechanical strength (toughness) is improved. Furthermore, since the metal part having a high elastic modulus exists at the center of the amorphous part, it is considered that a constant elastic modulus can be maintained without being excessively flexible.

  In addition, since the melting point of the metal species is higher than 350 ° C., which is the upper limit of the melt kneading temperature of the PAS resin (the melting point at which 420 ° C. of zinc is the lowest among the metal species), melting occurs even when kneaded to the PAS resin. Without being dispersed in the PAS resin, the mechanical strength of the PAS resin composition can be improved. Furthermore, since the toxicity of the metal species is generally low, the resin composition obtained by melt-kneading with the PAS resin has the advantage that its use is less restricted and it is less expensive than noble metals.

  Among the metal species, copper, nickel, and zinc are particularly preferable. In addition to these metals having a standard redox potential in the above range, the standard enthalpy of formation of oxides (unit: kJ / mol) is from -157 (CuO) to -348 (ZnO) and aluminum oxide. It is significantly higher than −1675, zirconium oxide −1100, and titanium oxide −940. Accordingly, the stability of the oxide is not higher than that of the metal simple substance, and the metal simple substance is partially exposed on the surface of the metal species, and a coordinate bond can be formed with the PAS resin. it can.

  In the present invention, the metal species contained in the metal fine particles (B) may be at least one simple metal selected from copper, nickel, zinc, cobalt, iron, and manganese, or include at least one of these metal species. An alloy may be used. Even if these alloys are used, the same effect as that of the single metal particles can be obtained. Two or more kinds of simple metals selected from copper, nickel, zinc, cobalt, iron and manganese may be used in combination.

  The alloy preferably has a total content of the metal species of 80% by mass or more, and more preferably 90% by mass or more. Examples of such alloys include brass based on copper, white bronze, red copper, tomback, western white, etc., and monel based on nickel as the main component, and iron as the main component. Examples include stainless steel, invar, kovar, barmendur, and spiegel. Ferromanganese and the like are exemplified as an alloy mainly composed of manganese.

  The average particle diameter of the metal fine particles (B) is preferably 50 μm or less from the viewpoint of application to thin molded bodies. Moreover, since the surface area per mass of particle | grains becomes large so that an average particle diameter is small, since a high effect can be exhibited by addition of a small amount, it is more preferable. Therefore, the average particle diameter of the metal fine particles is more preferably 20 μm or less, and further preferably 10 μm or less. In particular, among the metal fine particles, copper and nickel are also commercially available as particles having an average particle diameter of 500 nm or less, and these can also be preferably used. The average particle diameter was measured by a light scattering method using a laser diffraction particle size distribution measuring apparatus ("SALD 2100-J" manufactured by Shimadzu Corporation) using methanol as a dispersion medium and equipped with a circulation pump in the cell. Is.

  Moreover, there is no restriction | limiting in particular about the particle size distribution of the said metal microparticle (B), However, What is distributed many particles smaller than an average particle diameter is preferable. Further, if there are coarse particles having a size of 200 μm or more, there is a possibility that they become the center point of stress. Therefore, these coarse particles are desirably removed by classification treatment or the like.

  The particle shape of the metal fine particles (B) is preferably spherical or a shape having an aspect ratio of 2 or less. Compared with metal fine particles having a large aspect ratio, toughness at a high temperature is particularly good when metal fine particles having a small aspect ratio are used. The aspect ratio of the metal fine particles in the present invention is calculated by taking a microphotograph of the metal fine particles and using image processing software “A Image-kun” (manufactured by Asahi Kasei Engineering Corporation).

  In the PAS resin composition of the present invention, the mass content of the metal fine particles (B) in 100% by mass of the resin composition is 5 to 30% by mass. Moreover, the range of 10-30 mass% is more preferable. If it is this range, sufficient mechanical characteristics will be acquired in the resin molding which consists of a PAS resin composition of this invention.

  In addition to the above PAS resin (A) and metal fine particles (B), the PAS resin composition of the present invention may further contain a thermoplastic elastomer (C) in order to further improve the elongation characteristics. The blending ratio of the thermoplastic elastomer is preferably 1 to 10% by mass and more preferably 2 to 5% by mass in 100% by mass of the PAS resin composition. If the blending ratio of the thermoplastic elastomer in the PAS resin composition is within this range, the elongation characteristic can be improved while reducing the decrease in the elastic modulus of the PAS resin composition. There is a tendency that a decrease in rate can be suppressed.

  The thermoplastic elastomer (C) used in the present invention is preferably meltable, mixed and dispersed at the temperature at which the PAS resin (A) is kneaded. From this point, a thermoplastic elastomer having a melting point of 300 ° C. or less and having rubber elasticity at room temperature is preferable. Among them, in terms of heat resistance, ease of mixing, and improvement of freezing resistance, among the thermoplastic elastomers (C), those having a glass transition point of −40 ° C. or less are preferable because they have rubber elasticity even at low temperatures. The glass transition point is preferably as low as possible, but is usually preferably in the range of -180 to -40 ° C, particularly preferably in the range of -150 to -40 ° C.

  The thermoplastic elastomer (C) has at least one functional group selected from the group consisting of epoxy groups, amino groups, hydroxy groups, carboxyl groups, mercapto groups, isocyanate groups, vinyl groups, acid anhydride groups, and ester groups. The thermoplastic elastomer (C) is preferably from the viewpoint of improving low-temperature impact resistance. Further, among these, a functional group derived from a carboxylic acid derivative such as an epoxy group, an acid anhydride group, a carboxyl group, or an ester group is particularly preferable because of its high affinity with the PAS resin (A).

  The thermoplastic elastomer (C) can be obtained, for example, by copolymerization of an α-olefin and a vinyl polymerizable compound having the functional group. Examples of the α-olefins include α-olefins having 2 to 8 carbon atoms such as ethylene, propylene, and butene-1. Examples of the vinyl polymerizable compound having a functional group include α, β-unsaturated carboxylic acids such as (meth) acrylic acid and (meth) acrylic acid esters and alkyl esters thereof, maleic acid, fumaric acid, and itaconic acid. Other unsaturated dicarboxylic acids having 4 to 10 carbon atoms and mono- and diesters thereof, α, β-unsaturated dicarboxylic acids such as acid anhydrides and derivatives thereof, glycidyl (meth) acrylate, and the like.

  Among these, ethylene having at least one functional group selected from the group consisting of an epoxy group, amino group, hydroxy group, carboxyl group, mercapto group, isocyanate group, vinyl group, acid anhydride group and ester group in the molecule. -A propylene copolymer or an ethylene-butene copolymer is preferable, and an ethylene-propylene copolymer or an ethylene-butene copolymer having a carboxyl group is more preferable. These thermoplastic elastomers can be used alone or in combination of two or more.

  In the present invention, various inorganic fillers and additives may be added for the purpose of improving mechanical properties and molding processability as long as the effects of the present invention are not impaired.

  The said inorganic filler can be used together for the purpose of further improving the elasticity modulus of the resin molding which consists of a PAS resin composition of this invention. Examples of the inorganic filler include glass fiber, carbon fiber, calcium titanate, potassium titanate, silicon carbide, aramid fiber, ceramic fiber, metal fiber, silicon nitride, barium sulfate, calcium sulfate, kaolin, clay, bentonite, Sericite, zeolite, mica, mica, talc, wollastonite, PMF, ferrite, aluminum silicate, calcium silicate, calcium carbonate, dolomite, magnesium oxide, magnesium hydroxide, antimony trioxide, titanium oxide, iron oxide, milled glass, Examples thereof include glass beads and glass balloons.

  In addition, since there exists a tendency for elongation characteristics to fall when there are too many compounding quantities of these inorganic fillers, it is preferable that it is 5 mass% or less in a PAS resin composition, and it is more preferable that it is 1 mass% or less. preferable.

  In addition, the PAS resin composition of the present invention includes a release agent, a colorant, an antistatic agent, an antioxidant, a heat stabilizer, an ultraviolet stabilizer, an ultraviolet absorber, a foaming agent, a flame retardant, if necessary. You may mix | blend additives, such as a flame retardant adjuvant and a rust preventive agent.

  In the PAS resin composition of the present invention, the 4 mm thick molded article conforming to JIS K7128-3 has a right-angled tear breaking point displacement at 150 ° C. of 8 mm or more, but this right-angled tear breaking point displacement is 10 mm or more. More preferably. The displacement at the right-angled tear breaking point is the moving distance of the chuck of the tensile tester until the sample breaks, and it is preferably as large as possible.

  Further, in the PAS resin composition of the present invention, the tensile creep strain at 150 ° C., 10 MPa, 20 hours in an ASTM No. 4 dumbbell 1.6 mm-thick molded product based on ASTM D2990 is 5% or less, but 3% The following is more preferable.

  When the above-mentioned right-angled tear breaking point displacement amount and tensile creep strain are in the above ranges, the mechanical strength of the resin molded body made of the PAS resin composition of the present invention can be sufficiently increased. In addition, when the PAS resin composition of the present invention is used for a metal insert part, the stress generated between the resin and the metal can be relieved, and cracking of the PAS resin composition and peeling from the metal can be suppressed. Can do.

  The PAS resin composition of the present invention is obtained by uniformly dry-blending the PAS resin (A) and the metal fine particles (B) with a mixer such as a tumbler or a Henschel mixer, and then melt-kneading with a uniaxial or biaxial extruder. And can be obtained as resin pellets.

  In addition, as a method for producing a resin molded body comprising the PAS resin composition of the present invention, the resin pellets are used in various molding machines such as injection molding, compression molding, extrusion molding, hollow molding, foam molding, transfer molding and the like. And a method of molding. In the case of molding a metal insert molded product, a method in which a metal to be inserted in a mold is first placed and then a resin is injection molded is common.

  The following examples further illustrate the present invention.

(Examples 1-10 and Comparative Examples 1-8)
According to the blending ratio shown in Tables 1 and 2, after PAS resin (A), metal fine particles (B) and the like are uniformly dry blended, it is melt kneaded at 290 to 330 ° C. in a 35 mmφ twin screw extruder, A pellet of the PAS resin composition was obtained. In addition, the material shown with the symbol in Table 1 and 2 represents the following material.

PPS-1: Linear polyphenylene sulfide (“DSP ML-320” manufactured by DIC Corporation; peak molecular weight: 47,200, melt viscosity 240 Pa · s)
PPS-2: Linear polyphenylene sulfide (“DSP MA-520” manufactured by DIC Corporation; peak molecular weight: 45,000, melt viscosity: 200 Pa · s)
PPS-3: Linear polyphenylene sulfide (“DSP LR-1G” manufactured by DIC Corporation; peak molecular weight: 30,400, melt viscosity: 48 Pa · s)

Cu: Copper powder (“1020Y” manufactured by Mitsui Metal Mining Co., Ltd .; average particle size: 0.36 μm, shape: spherical, aspect ratio: 1.0)
Zn: Zinc powder (“F-2000” manufactured by Honjo Chemical Co., Ltd .; average particle size: 4 μm, shape: spherical, aspect ratio: 1.1)
Ni: nickel powder (“SFR-Ni” manufactured by Nippon Atomizing Co., Ltd .; average particle size: 10 μm, shape: spherical, aspect ratio: 1.1)

Ela: thermoplastic elastomer (ethylene: methyl acrylate: glycidyl methacrylate = 64 mol%: 30 mol%: 6 mol% copolymer)
GB: Glass beads (average particle diameter: 18 μm, spherical, aspect ratio: 1.0)
GF: Glass fiber (“T-717H” manufactured by Nippon Electric Glass Co., Ltd., average fiber diameter: 10 μm, aspect ratio: 300)

  In addition, since glass fiber (GF) fractures | ruptures at the time of melt-kneading, it was set to the aspect ratio: 33 in the PAS resin composition of the comparative example 6, and the aspect ratio: 36 in the PAS resin composition of the comparative example 7.

(Preparation of measurement sample)
Next, using the obtained PAS resin composition pellets, a right-angled tear breaking point displacement is measured by injection molding using a mold having a cavity with a thickness of 4 mm according to JIS K7128-3. A test piece was prepared. The resin temperature was 300 ° C., the mold temperature was 140 ° C., the injection speed was 10 mm / second (cylinder diameter: 25 mmφ), and the injection pressure was 50 to 80 MPa.

(Measurement of displacement at right-angled tear breaking point)
Using the measurement sample obtained above, in accordance with JIS K7128-3, a right angle tear fracture was performed at 150 ° C. using a tensile tester (“Autograph AG-X” manufactured by Shimadzu Corporation). The movement distance of the chuck of the tensile tester until the fracture occurred was measured as the displacement at the right-angled tear breaking point.

(Measurement of tensile creep strain)
Using the measurement sample obtained above, tensile creep strain at 150 ° C., 10 MPa, 20 hours was measured in accordance with ASTM D2990.

(Preparation of metal insert airtightness test sample)
Using the PAS resin composition pellets obtained above, with the copper pins as shown in FIG. 1 installed in the mold, the resin was injection-molded, and a metal insert airtightness test sample ( A metal insert part shown in FIG. 1 was obtained. The resin temperature was 300 ° C., the mold temperature was 140 ° C., the injection speed was 10 mm / second (cylinder diameter: 25 mmφ), and the injection pressure was 50 to 80 MPa.

(Metal insert airtightness test)
The metal insert hermeticity test sample obtained above was allowed to stand at 40 ° C. for 1 hour, then left at 150 ° C. for 1 hour, again left at 40 ° C. for 1 hour, and then left at 150 ° C. for 1 hour. 1) After 10 cycles, connect the pipe to the metal insert airtightness test sample as shown in Fig. 1 and send compressed air from the pipe in water to generate bubbles from the metal insert airtightness test sample. The metal insert gas tightness test was conducted. In this test, one cycle was defined as adding a heat history of 40 ° C. for 1 hour and 150 ° C. for 1 hour. This test is an index of durability under an environment where the temperature change is severe, and a case where the measured value is 0.4 MPa or more was judged to be good.

  Is shown in Table 3.

  Tables 1 and 2 show the measurement results of the above-mentioned right-angled tear breaking point displacement and tensile creep strain, and the results of the metal insert hermeticity test.

  From the results of the metal insert hermeticity test shown in Table 1, the metal insert parts using the PAS resin compositions of Examples 1 to 10 of the present invention have high hermeticity, and repeat high-temperature heating and cooling. Even if it went, it turned out that the crack of a PAS resin composition does not arise and adhesiveness with a metal does not fall.

  On the other hand, the PAS resin compositions of Comparative Examples 1 and 4 to 6 containing no metal fine particles, and the PAS resin compositions and peaks of Comparative Examples 2 to 3 in which the compounding amount of the metal fine particles is less than 5% by mass or more than 30% by mass. Since the metal insert part using the PAS resin composition of Comparative Example 8 containing a PAS resin having a molecular weight of less than 35,000 has low hermeticity, when it is repeatedly heated and cooled at high temperatures, it cracks into the PAS resin composition. It was also found that the adhesion with the metal was also lowered.

Illustration of metal insert airtightness test

Explanation of symbols

1 3mmφ cylindrical metal 2 Resin part (cylindrical molded product)
3 Female thread part 4 that can be connected to piping 4 Piping having a male thread part that can be connected to female thread part 3

Claims (4)

A polyarylene sulfide resin (A) having a peak molecular weight of 35,000 or more determined by gel permeation chromatography and a metal containing at least one metal species selected from copper, nickel, zinc, cobalt, iron and manganese A metal insert part obtained by insert-molding a metal part using a polyarylene sulfide resin composition containing fine particles (B),
The mass content of the metal fine particles (B) in 100% by mass of the resin composition is in the range of 5 to 30% by mass, and the right-angled tear breaking point displacement at 150 ° C. in a 4 mm-thick molded product according to JIS K7128-3 A metal insert characterized by an amount of 8 mm or more and a tensile creep strain at 150 ° C., 10 MPa, 20 hours in an ASTM No. 4 dumbbell 1.6 mm thick molded product conforming to ASTM D2990 of 5% or less. Parts . The metal insert part of Claim 1 which contains 1-10 mass% of thermoplastic elastomers (C) in 100 mass% of the said polyarylene sulfide resin composition. The metal insert part according to claim 1 or 2, wherein an average particle diameter of the metal fine particles (B) is 20 µm or less. The metal insert part according to any one of claims 1 to 3, wherein the metal fine particles (B) have a spherical shape or an aspect ratio of 2 or less.

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