KR20050053510A - An insert molded article - Google Patents

Abstract

Provided is an insert molded article excellent in cryogenic impact characteristics and low in amount of mold deposition during molding. (A) Long diameter (longest linear distance of a cross section) and short diameter (longest length of a cross section and a perpendicular | vertical direction of a cross section orthogonal to a longitudinal direction with respect to 100 weight part of polyarylene sulfide resins) The linear composition of the resin composition and 5 or 200 parts by weight of the fibrous reinforcement having a flat cross-sectional shape in the range of 1.3 to 10, (C) 1 to 25 parts by weight of the thermoplastic elastomer and the metal or inorganic solid is insert-molded.

Description

Insert molded article {AN INSERT MOLDED ARTICLE}

The present invention relates to an insert molded article formed by insert molding a specific resin composition and a metal or an inorganic solid, and more particularly, to an insert molded article having improved cryogenic impact properties.

The insert molding method is a molding method in which a metal is embedded in a resin by utilizing the characteristics of a resin and a material of a metal or an inorganic solid (hereinafter, referred to as metal), and is used for automobile parts, electrical / electronic parts, and OA equipment parts. Applied in a wide range of fields, it is now one of the common molding methods.

However, in resins and metals, the expansion and contraction rate (so-called linear expansion coefficient) due to temperature change is extremely different, so that the resin part of the molded part has a thin thickness, a part with a large change in thickness, or a sharp edge of metal. It has a lot of problems, such as being broken immediately after shaping | molding or broken by the temperature change in use. For this reason, the present situation is that the use and the shape of the molded article are quite limited. Moreover, in recent years, resinization around an engine progresses also in the automobile field, and the insert molded article also becomes an important component. In particular, ignition related parts, distributor parts, various sensor parts, various actuator parts, throttle parts, power module parts, ECU parts, connector parts, etc., metal parts such as aluminum, copper, iron, brass, alloys, Although many insert molded articles packaged with polyarylene sulfide (hereinafter abbreviated as PAS) resin represented by phenylene sulfide (hereinafter abbreviated as PPS) resin have been considered, this is because the structure of the insert part has a complicated structure and the thickness of the resin. In addition to the fact that there are many changes, since the place of use is near the engine room, the high and low temperature change is large, so that the performance required for the insert molded article is also required. Therefore, according to this point, in recent years, the resin which can endure long-term high-low temperature change, ie, the resin excellent in the high-temperature shock characteristic, is strongly desired.

PAS resins are widely used in electrical and electronic device component materials, automotive device component materials, and chemical device component materials in that they have high heat resistance, mechanical properties, chemical resistance, dimensional stability, and flame retardancy, but PAS resin lacks toughness. There is a drawback that it is weak and has low reliability to withstand long-term high and low temperature changes of the insert moldings.

As a conventional method for solving this problem, it is known to mix various elastomers. For example, Japanese Patent Application Laid-Open No. 98-249876 proposes blending an olefin elastomer with PPS resin, and Japanese Patent Application Laid-Open No. 2000-263586 uses a combination of a specific elastomer and a filler. In addition, Japanese Patent Laid-Open No. 2002-179914 proposes blending two kinds of elastomers. In order to obtain the desired high-temperature impact properties, it is achieved by increasing the blending amount of the thermoplastic elastomer. However, since the process temperature of the PAS resin is 300 ° C. or more, in general, the thermoplastic elastomer tends to cause thermal deterioration at high temperature, and molding There is a drawback that the mold mold weld metal in the city increases significantly, and there are problems in the methods of the three Japanese Patent Laid-Open Publications. Japanese Patent Laid-Open No. 2003-176410 proposes to use a specific elastomer and silicone oil in combination as a solution to this problem, but the improvement of the cryogenic impact characteristics is insufficient.

On the other hand, improvement in molding processing conditions is disclosed in Japanese Patent Laid-Open No. 2001-300977. Although this method is an effective method, since it is molded in a low-temperature mold, there is a problem that the heat treatment process is required after molding in order to increase the physical properties and crystallinity of the PAS resin, and the process becomes complicated.

An object of this invention is to solve the said prior art subject and to provide the PAS resin insert molded article by which the cryogenic impact property was improved.

MEANS TO SOLVE THE PROBLEM In view of the said subject, the present inventors earnestly examined in order to obtain the insert molded article excellent in the cryogenic impact characteristic, As a result, the composition which mix | blended the flat fibrous reinforcement agent and thermoplastic elastomer which has PAS resin as a main part and has a specific cross-sectional shape to this is mechanical It has been found that the cryogenic impact characteristic (particularly even when the thickness of the resin is thin or the metal has sharp edges) is remarkably improved without significantly deteriorating the physical properties, so that the amount of mold-welded metal generated during molding is also small. It was completed.

That is, the present invention relates to (A) 100 parts by weight of polyarylene sulfide resin, (B) long diameter (longest straight line length of cross section) and short diameter (long diameter) of the cross section perpendicular to the length direction. Resin composition and a metal or inorganic compound comprising 5 to 200 parts by weight of a fibrous reinforcement having a flat cross-sectional shape in the range of 1.3 to 10, and (C) 1 to 25 parts by weight of a thermoplastic elastomer). It is an insert molded article formed by insert molding a solid.

Hereinafter, the structural component of the resin material of this invention is demonstrated concretely. PAS resin as (A) component used for this invention consists mainly of-(Ar-S)-(where Ar is an arylene group) as a repeating unit. Examples of the arylene group include p-phenylene group, m-phenylene group, o-phenylene group, substituted phenylene group, p, p'-diphenylene sulfone group, p, p'-biphenylene group, p, p'-diphenylene An ether group, a p, p'- diphenylene carbonyl group, a naphthalene group, etc. can be used. In this case, in the arylene sulfide group comprised from the said arylene group, in addition to the polymer using the same repeating unit, ie, a homopolymer, the copolymer containing a heterogeneous repeating unit may be preferable at the point of processability of a composition.

As homopolymer, what makes a p-phenylene sulfide group which used p-phenylene group as a repeating unit as an arylene group is especially used preferably. In addition, as a copolymer, although the 2 or more types of combination different from the arylene sulfide group which consists of the said arylene group can be used, the combination containing p-phenylene sulfide group and m-phenylene sulfide group is especially especially used preferably. Among these, it is suitable to contain p-phenylene sulfide group 70 mol% or more, Preferably it is 80 mol% or more from the point of physical properties, such as heat resistance, moldability, and mechanical properties.

Moreover, among these PAS resins, the high molecular weight polymer of the substantially linear structure obtained by polycondensation from the monomer mainly having a bifunctional halogen aromatic compound can be used especially preferably, In addition to PAS resin of a linear structure, In the case of polycondensation polymerization, a polymer in which a branched structure or a crosslinked structure is partially formed by using a small amount of monomers such as three or more polyhalogen aromatic compounds can be used. A relatively low molecular weight linear polymer is used in the presence of oxygen or an oxidizing agent. The polymer which heated at high temperature, raised melt viscosity by oxidative crosslinking or thermal crosslinking, and improved moldability can also be used.

In addition, as PAS resin of (A) component, the part (1-30 weight) mainly made from the said linear PAS resin (310 degreeC, the viscosity in the sustaining speed 1200sec ^-1 is 10-300 Pa.s) as a main body. Mixtures with branched or crosslinked PAS resins with a%, preferably 2-25% by weight) of relatively high viscosity (300-3000 Pa.s, preferably 500-2000 Pa.s) are also preferred.

In addition, the PAS resin used in the present invention is preferably subjected to acid washing, hydrothermal washing, organic solvent washing (or a combination thereof) after polymerization to remove and purify impurities as by-products.

Next, the fibrous reinforcing agent (B) used in the present invention is characterized by having a flat cross-sectional shape, unlike the fibrous reinforcing agent having a generally circular cross-sectional shape which is generally used. In general, the composition in which the fibrous reinforcing agent represented by the glass fiber is blended is oriented in the flow direction during molding, so that the difference (anisotropy) between the molding shrinkage rate and the flow direction of the linear expansion coefficient of the molded article and the perpendicular direction increases. For this reason, as a molded article inserted into a metal or the like, there is a problem that larger deformation is likely to occur inside the molded article after molding solidification, and is easily broken. However, even in a composition in which a fibrous substance is blended, when the cross-sectional shape of the reinforcing agent is flat as in the present invention, it has been found that a molded article having remarkably high cold impact characteristics can be obtained because the anisotropy of the molding shrinkage rate and the linear expansion coefficient is small. On the other hand, as a method of suppressing the anisotropy of the molding shrinkage rate and the linear expansion coefficient, it is known to use a plate-like filler in combination. However, in this case, since the mechanical properties and the adhesion of the welded part are reduced, sufficient high-temperature shock characteristics are not obtained.

In the cross section perpendicular to the longitudinal direction, the fibrous reinforcement (B) having a flat cross section used in the present invention is a ratio of the long diameter (the longest straight distance in the cross section) and the short diameter (the longest straight distance in the perpendicular direction). 1.3 to 10, preferably 1.5 to 5. Specific shapes include oblong, oval, semicircle, eyebrow, oblong, or similar shapes, particularly those belonging to the eyebrow, elliptical. The fibrous reinforcing agent (B) having a flat cross section has a high specific surface area, which improves adhesion between the fiber and the PAS resin, improves bending strength, rigidity, and the like, thereby exhibiting excellent cryogenic impact characteristics. Also in this respect, the fibrous reinforcement which has an eyebrow cross-sectional shape which has a depression in a center part is more preferable. The ratio of the long diameter to the short diameter of less than 1.3 has no effect on the cryogenic impact characteristics, and the ratio of more than 10 is difficult to manufacture itself.

Next, the cross-sectional area of the fibrous reinforcing agent (B) having a flat cross-sectional shape used in the present invention becomes difficult to obtain a sufficient reinforcing effect as the size thereof increases, and when too small, the manufacture of itself becomes difficult and a problem in handling. Also occurs. Therefore, the cross-sectional area of the fibrous reinforcing agent in the present invention is 2 × 10 ⁻⁵ to 8 × 10 ⁻³ mm ² , preferably 8 × 10 ⁻⁵ to 8 × 10 ⁻⁴ mm ² .

Next, although the length of the fibrous reinforcement (B) having a flat cross-sectional shape used in the present invention is arbitrary, in consideration of the mechanical properties, molding processability, etc. of the molded article, 50 to 1000 μm is preferable as the average fiber length in the molded article. Moreover, a hollow fiber can also be used as a fibrous reinforcing agent (B) for the purpose of lightening the specific gravity of a resin composition.

Examples of such fibrous reinforcing agents (B) include mineral fibers such as glass fibers, carbon fibers, zinc oxide fibers, titanium oxide fibers, austenite and asbestos fibers, boron fibers, zirconia fibers, silica fibers, silica alumina fibers, zirconia fibers, Boron nitride fibers, stainless fibers, copper fibers, polyamide fibers, high molecular weight polyethylene fibers, aramid fibers, polyester fibers, fluorine fibers, and the like can be given, but glass fibers are preferably used. On the other hand, two or more types of fibrous reinforcing agents (B) may be mixed and used for the purpose of improving mechanical properties, improving sliding motion, and providing conductivity.

In the use of these fibrous reinforcing agents (B), it is preferable to use a convergence agent or a surface treatment agent if necessary. For example, functional compounds, such as an epoxy compound, an isocyanate type compound, a silane type compound, and a titanate type compound, are mentioned. These compounds may be used by performing surface treatment or convergence treatment in advance, or may be added at the same time during material preparation.

The fibrous reinforcement (B) having such a flat cross section is a bushing used for discharging molten glass, for example, in the case of glass fibers, and a nozzle having an appropriate hole shape such as a rectangular, elliptical, rectangular, and slit shape is used. It is prepared by spinning. Moreover, it can prepare by releasing molten glass from the several nozzles provided in the vicinity which have various cross-sectional shape (including circular cross section), bonding the discharged molten glass together, and making it into a single filament. Moreover, carbon fiber etc. can also be prepared using such a method.

The fibrous reinforcing agent (B) used in the present invention is 5 to 200 parts by weight, preferably 10 to 100 parts by weight, based on 100 parts by weight of the polyarylene sulfide resin (A). If it is less than 5 parts by weight, excellent mechanical properties inherent to the filler-reinforced PAS resin composition are not obtained, and if it is more than 200 parts by weight, problems of workability such as fluidity decrease occur.

In the present invention, in order to further improve the cryogenic impact characteristics, (C) thermoplastic elastomer is used in combination.

(C) Thermoplastic elastomers include polyolefin elastomers, polyester elastomers, fluorine elastomers, silicone elastomers, butadiene elastomers, polyamide elastomers, polystyrene elastomers, urethane elastomers, and various particulate elastomers having a crosslinked structure in the center. These can be mentioned, 1 type, or 2 or more types can be used.

As the (C) thermoplastic elastomer, a polyolefin elastomer is preferable, and in particular, an olefin copolymer having a α-olefin and an α, β-unsaturated acid glycidyl ester as a main component is preferably used. Moreover, the polyolefin-type elastomer which copolymerized various graft copolymers with the main component which consists of glycidyl ester of alpha-olefin and alpha, beta- unsaturated acids is also used preferably.

As a compounding quantity of (C) thermoplastic elastomer, it is 1-25 weight part, Preferably it is 1-15 weight part, More preferably, it is 1-8 weight part with respect to 100 weight part of (A) polyarylene sulfide resin. If it is less than 1 part by weight, the effect of improving the cryogenic impact characteristic is not sufficient, and if it exceeds 25 parts by weight, a problem arises in that a large amount of mold weld metal adheres to the mold during molding.

Next, in this invention, it is preferable to mix | blend a silicone oil (D) in order to improve the high temperature shock characteristic further. Silicone oils include unmodified silicone oils, or modified silicone oils with functional groups introduced therein. Unmodified silicone oils are typical of polydimethylsiloxane and polymethylphenylsiloxane, the latter of which for example include polydimethyldiphenylsiloxane copolymers, polydimethylphenylmethylsiloxane copolymers, polymethylphenyldiphenylsiloxane copolymers. On the other hand, the modified silicone oil is a part of the unmodified silicone oil modified with a functional group, and as the functional group, hydroxyl group, amino group, carboxyl group, carbinol group, epoxy group, methacryloxy group, mercapto group and the like And functional group introduction is preferably any of side chains, one end, both ends, and side chains and both ends. Specific examples of these modified silicone oils include terminal silanolpolydimethylsiloxane, terminal silanolpolydimethyldimethylphenyl siloxane, terminal hydroxypropylpolydimethylsiloxane, polydimethylhydroxyalkylene oxide methylsiloxane, and terminal aminopropylpolydiamide. Methylsiloxane, aminoalkyl-containing T-structure polydimethylsiloxane, terminal carboxypropylpolydimethylsiloxane, carboxypropyl-containing T-structure polydimethylsiloxane, terminal glycidoxypropylpolydimethylsiloxane, glycidoxypropyl-containing T-structure polydi Methylsiloxane, polyglycidoxypropylmethylsiloxane, terminal carbinolpolydimethylsiloxane, terminal acetoxypolydimethylsiloxane, terminal dimethylaminopolydimethylsiloxane, terminal methacryloxypropylpolydimethylsiloxane, methacryloxypropyl Containing T Structure Polydimethylsiloxane, Mercaptop Lofil-containing T structure polydimethylsiloxane, a polymer capto propylmethylsiloxane, etc. are mentioned.

The viscosity of the silicone oil (D) is not particularly limited in the range of 10 to 500000 cSt (centistox) at 25 ° C., but is preferably 100 to 100000 cSt in view of handleability and dispersibility at the time of mixing. In addition, the use of a silicone oil supported on an inorganic fine powder is more preferable in terms of quality, such as handleability and dispersibility during mixing.

In addition, the compounding quantity of silicone oil (D) is 0.1-15 weight part with respect to 100 weight part of (A) polyarylene sulfide resin, Preferably it is 0.5-10 weight part. If it is less than 0.1 part by weight, the effect of improving the cryogenic impact characteristics is not obtained, and if it is more than 15 parts by weight, the oil component is doubled to the surface of the molded article, which is not preferable.

In the resin composition of the insert molded article of the present invention, in order to improve the performance of mechanical strength, heat resistance, dimensional stability (strain resistance, distortion), electrical properties, and the like, fibrous and / or non-fibrous fibers other than the fibrous reinforcement (B) having a flat cross-sectional shape A fibrous inorganic filler (E) can also be mix | blended. For this purpose, fibrous, granular or plate-shaped fillers are used.

Examples of the fibrous filler include glass fibers, asbestos fibers, carbon fibers, silica fibers, silica and alumina fibers, zirconia fibers, boron nitride fibers, boron fibers, potassium titanate fibers, and additional fibrous metals such as stainless steel, aluminum, titanium, copper, and brass. Inorganic fibrous substances, such as a substance, are mentioned. Particularly representative fibrous fillers are glass fibers or carbon fibers. High melting point organic fiber materials such as polyamide, fluorine resin, and acrylic resin can also be used.

On the other hand, as the particulate filler, carbon black, silica, quartz powder, glass beads, glass powder, calcium silicate, aluminum silicate, kaolin, talc, clay, diatomaceous earth, silicate such as austenite, iron oxide, titanium oxide, zinc oxide, alumina and Oxides of the same metal, calcium carbonate, carbonates of metals such as magnesium carbonate, calcium sulfates, sulfates of metals such as barium sulfate, other silicon carbides, silicon nitrides, boron nitride, and various metal powders.

Moreover, mica, glass flakes, and various metal foils are mentioned as a plate-shaped filler. These inorganic fillers can be used together or in combination of two or more.

In the use of these fillers, it is preferable to use a convergence agent or a surface treatment agent if necessary. For example, it is a functional compound, such as an epoxy type compound, an isocyanate type compound, a silane type compound, and a titanate type compound. Such compounds may be used by performing surface treatment or convergence treatment in advance, or may be added at the same time when preparing the material.

Although the usage-amount of an inorganic filler (E) is not specifically limited, Generally, it is 20-250 weight part per 100 weight part of PAS resin of (A) component. If it is less than 20 parts by weight, the mechanical strength is inferior. If it is more than 20 parts by weight, the molding work becomes difficult, and the mechanical strength of the molded product is also caused.

In addition, 5-50 parts by weight of a relatively high heat-resistant amorphous resin (F) per 100 parts by weight of the PAS resin of the component (A) may be added to the resin composition of the insert molded article of the present invention for the purpose of further improving the cryogenic impact characteristics. Can be. Such amorphous resin (F) may be a copolymer or functional group of polyphenylene ether, polyallylate, polysulfone, polyether sulfone, polyetherimide, polycarbonate, cyclic olefin resin, and amorphous resin thereof. Modified polymers, and the like.

Moreover, a silane compound can be mix | blended with the resin composition of the insert molding of this invention for the purpose of improving a burr etc. in the range which does not impair the effect of this invention. As the silane compound, various types such as vinyl silane, methacryloxy silane, epoxy silane, amino silane and mercapto silane are included, and for example, vinyl trichloro silane and γ-methacryloxypropyl trimethoxy silane. Phosphorus, (gamma)-glycidoxy propyl trimethoxysilane, (gamma)-aminopropyl triethoxysilane, (gamma)-mercapto trimethoxysilane, etc. are mentioned, It is not limited to these.

In addition, the resin composition of the insert molded article used in the present invention may be used in combination with a small amount of other thermoplastic resin components in addition to the above components depending on the purpose. As other thermoplastic resin used here, if it is stable resin at high temperature, any is preferable.

Further, in order to give the resin composition of the insert-molded article used in the present invention to give the desired properties according to the purpose, generally known substances added to the thermoplastic resin and the thermosetting resin, that is, colorants such as flame retardants, dyes and pigments, Lubricants, crystallization accelerators, crystal nucleating agents, various antioxidants, heat stabilizers, weathering stabilizers and the like can be blended according to the required performance.

Preparation of the resin composition of the insert molded article used by this invention can be prepared by the facilities and method generally used for preparation of a synthetic resin composition. Generally, after mixing necessary components, it can melt-knead it using a single screw or twin screw extruder, and can extrude and produce the pellet for shaping | molding. Moreover, it is also one of the preferable methods to melt-extrude a resin component and to add and mix a fibrous inorganic filler in the meantime.

An insert molded article is made by attaching a metal or the like to a molding die in advance and filling the outer side with the blended resin composition to form a composite molded article. As a molding method for filling a resin into a mold, there are injection molding, extrusion compression molding, and the like, but injection molding is common. In addition, since the raw material to be inserted into the resin is used for the purpose of utilizing its properties and replenishing the defects of the resin, those which do not change shape or melt when contacted with the resin at the time of molding are used. For this reason, metals, such as aluminum, magnesium, copper, iron, brass, and these alloys, and inorganic solids, such as glass and ceramic, were previously shape | molded by the rod, the pin, the screw, etc. are used.

Example

Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited to these.

In addition, the measuring method of the physical property evaluation shown to the following example is as follows.

(1) cryogenic impact characteristics

The resin pellet is inserted and injection molded into a metal pin (14mm × 14mm × 24mm) so that the minimum thickness of the resin part is 1mm under the conditions of a resin temperature of 320 ° C., a mold temperature of 150 ° C., an injection time of 40 seconds, and a cooling time of 60 seconds. Prepared.

The obtained insert molded article was heated at 180 ° C. for 2 hours using a cold impact tester, and then cooled to 2 ° C. by lowering the temperature to −40 ° C., and further heated to 180 ° C. at a high low temperature as one cycle. The impact test was performed, the number of cycles until a crack arises in a molded article was measured, and the high temperature shock resistance was evaluated.

(2) Evaluation of the amount of mold welding metal during molding

After a specific molded article was molded under the following conditions by an injection molding machine and a predetermined number of shots were molded, the mold welding metal adhered to the mold surface and the vent periphery was visually evaluated in the following three steps.

○; Less adhesion

△; Attachment is confirmed, but acceptable.

×; The amount of adhesion is large and molding mass production is impossible.

(Molding conditions)

Injection Molding Machine: Toshiba IS30FRA-lA

Cylinder temperature: 340 ℃

Injection time: 2 seconds

Cooling time: 5 seconds

Mold temperature: 60 ℃

Molding Shots: 500 Shots

<Examples 1-6, Comparative Examples 1-9>

As shown in Tables 1 and 2, each raw material component ((A), (C), (D), (E), (F) component) was mixed with a Henschel mixer for 5 minutes, and this was 2 at a cylinder temperature of 320 ° C. It injected | thrown-in to the screw extruder, (B) component was added separately from the side supply part of an extruder, melt-kneading at resin temperature of 350 degreeC in the twin screw extruder, the pellet of the resin composition was made, and the said physical property was evaluated. The results are shown in Tables 1 and 2.

In addition, the specific substance of each component used by the Example and the comparative example is as follows.

(A) polyphenylene sulfide (PPS) resin

Kureha Chemical Co., Ltd. product, Portron KPS (310 degreeC, viscosity 30Pa * s at a buoyancy speed 1200sec ^-l )

(B) glass fiber

Glass fiber with flat cross-sectional shape

(B-release 1)

Cross-sectional shape: eyebrow type, long diameter 24μm, short diameter 12μm, long diameter / short diameter ratio 2 (made by Dongdong Co., Ltd., CSH-3PA)

(B-release 2)

Cross-sectional shape: long round, long diameter 24μm, short diameter 6μm, long diameter / short diameter ratio 4 (made by Dongdong Co., Ltd., CS-3PF)

Glass fiber with circular cross-sectional shape

(B-one 1)

Long diameter 17μm, long diameter / short diameter ratio 1 (made by dongbang Co., cs-3ql)

(B-one 2)

Long diameter 13μm, long diameter / short diameter ratio 1 (product of Nippon Electric Glass, ECS03-717)

(C) thermoplastic elastomer

Copolymer obtained by grafting a methyl methacrylate / butyl acrylate copolymer to an ethylene / glycidyl methacrylate copolymer (manufactured by Nippon Oil Co., Ltd., Modifa A4300)

(D) silicone oil

Polydimethylsiloxane Oil Viscosity 5000cSt (by Dore Dow Corning Silicone, SH200 Oil)

(E) inorganic filler

Calcium Carbonate (made by Dongyang Fine Chemical Co., Ltd., Whiteton P-30)

(F) amorphous resin

Cyclic olefin resin (Ticona, TOPAS 6017)

The PAS resin insert molded article improved according to the present invention has excellent high temperature impact resistance compared to the conventional insert molded article.

Claims (7)

With respect to 100 parts by weight of polyarylene sulfide resin, (B) the long diameter (longest linear distance of the cross section) and short diameter (longest linear distance in the perpendicular direction) of the cross section perpendicular to the longitudinal direction An insert molded article formed by insert-molding a resin composition and a metal or inorganic solid comprising 5 to 200 parts by weight of a fibrous reinforcement agent having a flat cross-sectional shape in the range of 1.3 to 10, and (C) 1 to 25 parts by weight of a thermoplastic elastomer. The method of claim 1, An insert molded article wherein the fibrous reinforcement (B) having a flat cross-sectional shape is glass fiber. The method according to claim 1 or 2, An insert molded article in which the cross-sectional shape of the fibrous reinforcement (B) having a flat cross-sectional shape is an oblong shape, an oval shape, a semicircle, an eyebrow shape, a rectangular shape, or a similar form thereof. The method according to claim 1 or 2, The insert molded article whose thermoplastic elastomer (C) is an olefin copolymer whose main component is a glycidyl ester of an alpha olefin and an alpha, beta -unsaturated acid. The method according to claim 1 or 2, Furthermore, the insert molded article which mix | blended silicone oil (D) with 0.1-15 weight part with respect to 100 weight part of polyarylene sulfide resin (A). The method according to claim 1 or 2, Furthermore, the insert molded article which mix | blended fibrous and / or non-fibrous inorganic filler (E) other than the fibrous reinforcement (B) which has a flat cross-sectional shape. The method according to claim 1 or 2, Furthermore, the insert molded article which mix | blended amorphous resin (F).