JP2012067273A - Polyamide resin composition, and molded article composed of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-retardant polyamide resin composition excellent in moldability, and excellent in glow wire characteristic, toughness, flame retardancy and electric characteristics, and to provide a molded article composed of the same.SOLUTION: The polyamide resin composition is prepared by blending 100 pts.wt. of (A) an aliphatic polyamide resin containing (A1) a copolymerized polyamide of ≥50 to ≤98 wt.% of (a1) a caproamide unit and ≥2 to <50 wt.% of (a2) a hexamethylene adipamide unit, and 10 to 30 pts.wt. of (B) a triazine compound.

Description

  The present invention relates to a polyamide resin composition excellent in moldability and excellent in glow wire characteristics, toughness, flame retardancy, and electrical characteristics, and a molded article comprising the same.

  Conventionally, polyamide resins have been widely used in the electrical field because they are excellent in mechanical properties, heat resistance, flame retardancy, electrical properties, molding processability, and the like, and are indispensable particularly for connector applications. However, in recent years, with the miniaturization of products, connectors are also becoming smaller and thinner, and the demand for flame retardancy required for resins has become stricter, and advanced flame retarding technology has been demanded. . In particular, with regard to the glow wire ignition temperature, the required temperature has been changed from 725 ° C to 775 ° C due to the revision of the IEC 60335-1 standard ("safety of electrical equipment for home and similar use"), and the product thickness used. It was stipulated that the test should be conducted at a thickness closest to the product thickness without exceeding. In addition, the tracking resistance index defined in IEC60112 is often used as an index of electrical characteristics, and 600 V or more is required. This revision clarified that the conventionally used flame retardant polyamide resin is insufficient.

  In order to solve these problems, Patent Document 1 reports that a glow wire ignition temperature of 775 ° C. and a tracking resistance index of 600 V have been achieved by adding a large amount of a triazine flame retardant. The mechanical properties are inferior due to the addition of a large amount of the triazine compound, and there is a problem that the toughness essential for the connector application is significantly lost. Patent Document 2 introduces a technique for imparting toughness using an olefin resin, but the important flame retardancy is V-2, and there is a problem that the flame retardancy is remarkably lacking. Furthermore, Patent Document 3 reports that excellent glow wire characteristics have been achieved by blending phosphinates, zinc borate and the like, but it is insufficient in terms of mechanical properties such as toughness.

JP 2008-239896 A JP 2009-275121 A Special table 2008-512525 gazette

  The present invention provides a flame-retardant polyamide resin composition having excellent moldability and excellent glow wire characteristics, toughness, flame retardancy, and electrical characteristics, and a molded article comprising the same.

  Thus, as a result of intensive studies to solve the above problems, the present inventors have found that the above object can be achieved by blending a specific copolymerized polyamide resin with a triazine compound.

That is, the present invention is as follows.
(A) (A1) (a1) containing a copolymerized polyamide of 50% by weight to less than 98% by weight of caproamide units and (a2) 2% by weight to less than 50% by weight of hexamethylene adipamide units (A) 100% by weight of polyamide resin A polyamide resin composition comprising 10 to 30 parts by weight of (B) triazine-based compound with respect to parts.
(2) The (A) polyamide resin further comprises (A2) (a1) a copolymer polyamide having 2 to 50% by weight of caproamide units and (a2) 50 to 98% by weight of hexamethylene adipamide units. The polyamide resin composition according to (1), comprising:
(3) The polyamide resin composition according to (2), wherein the ratio of (A1) to (A2) is (A1) / (A2) = 15/85 to 85/15.
(4) The polyamide resin composition according to any one of (1) to (3), wherein the (A) polyamide resin further comprises (A3) a polyhexamethylene adipamide resin.
(5) The polyamide resin composition according to (4), wherein the weight ratio of (A1) to (A3) is (A1) / (A3) = 10/90 to 90/10.
(6) The polyamide resin composition according to any one of (1) to (5), wherein the triazine compound is melamine cyanurate.
(7) The polyamide resin composition according to (6), wherein the average particle size of melamine cyanurate is 15 μm or less.
(8) (A) 0.1 to 1.0 part by weight of polycondensate of diamine compound and fatty acid compound is blended with 100 parts by weight of polyamide resin (1) -Polyamide resin composition in any one of (7).
(9) A molded product obtained by molding the polyamide resin composition according to any one of (1) to (8) by at least one method selected from injection molding, extrusion molding, and blow molding.
(10) The molded product according to (9), wherein the molded product is a casing, an exterior part, or a connector.
(11) The molded article according to (9) or (10), wherein the glow wire ignition temperature is 775 ° C. or higher in all of the product thicknesses of 0.75 mm, 1.5 mm, and 3 mm in a test based on IEC60695-2-13 .

  According to the present invention, by blending a triazine-based compound with a specific copolymer polyamide resin, not only the viscosity lowering effect at the time of melting is caused and the moldability is excellent, but also high flame retardancy, excellent glow wire property, excellent In addition, a polyamide resin composition having tracking resistance can be provided. Furthermore, due to the effect of suppressing the crystallization degree and the crystallization speed, a polyamide resin composition having excellent product appearance and particularly excellent toughness can be provided since it has excellent mold transferability.

  Embodiments of the present invention will be described below. In the present invention, “weight” means “mass”.

  The (A) polyamide resin used in the present invention is a copolymer of (A1) (a1) 50% by weight to 98% by weight of caproamide units and (a2) 2% by weight to 50% by weight of hexamethylene adipamide units. It is important to include a polyamide. The copolymerization ratio of (a1) caproamide unit and (a2) hexamethylene adipamide unit is preferably (a1) / (a2) = 70/30 to 99/1 (weight ratio), more preferably (a1) / ( a2) = 90/10 to 97/3 (weight ratio). (A1) By using a polyamide containing a large amount of caproamide units, even when (B) a triazine compound described later is blended in a large amount, a decrease in toughness is suppressed and the appearance is not impaired.

  Further, in the present invention, (A1) is blended with (A2) (a1) a caproamide unit of 2% by weight to less than 50% by weight and (a2) a hexamethylene adipamide unit of 50% by weight or more and 98% by weight or less. Is preferred. By blending (A2), the melt viscosity can be lowered. In addition, the flame retardant can be highly blended without impairing the toughness even at the time of water absorption, and the appearance of the molded product can be improved. The copolymerization ratio of (a1) caproamide unit and (a2) hexamethylene adipamide unit is preferably (a1) / (a2) = 30/70 to 1/99 (weight ratio), more preferably (a1) / ( a2) = 10/90 to 1/99 (weight ratio).

  Although there is no restriction | limiting in particular in the mixture ratio in the case of using (A1) and (A2) together, (A1) / (A2) = 15 / 85-85 / 15 is preferable, More preferably, (A1) / (A2) = 20/80 to 80/20.

  Moreover, in this invention, it is preferable to mix | blend (A3) hexamethylene adipamide resin with (A1). By blending (A3), the moldability including mold releasability is greatly improved by improving the crystallization characteristics without impairing the glow wire property. Although there is no restriction | limiting in particular in the mixture ratio (weight ratio) in the case of using (A1) and (A3) together, (A1) / (A3) = 10 / 90-90 / 10 are preferable, More preferably, (A1) / ( A3) = 15/85 to 85/15.

  Preferable (A) copolymerized polyamide resin is (A1) (a1) copolymer polyamide resin of 50% by weight to 98% by weight of caproamide unit and (a2) hexamethylene adipamide unit of 2% by weight to less than 50% by weight. And (A2) (a1) 2 to 50% by weight of caproamide units and (a2) a resin containing a copolymerized polyamide resin having 50 to 98% by weight of hexamethylene adipamide units. (A1) (a1) 50% by weight to 98% by weight of caproamide units and (a2) a copolymerized polyamide resin having 2% by weight to 50% by weight of hexamethylene adipamide units, (A3) polyhexamethylene adipa Those containing a mid resin are also preferred. By including (A3) polyhexamethylene adipamide resin, not only the crystallization characteristics are improved and the moldability is greatly improved, but also the heat resistance is greatly improved. Depending on the required properties such as moldability and compatibility, it is also practically preferable to add another polyamide resin and use it as a mixture.

  Specific examples of other polyamide resins are polyamides mainly composed of amino acids, lactams or diamines and dicarboxylic acids. Representative examples of the main constituents include amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and paraaminomethylbenzoic acid, lactams such as ε-caprolactam and ω-laurolactam, and tetramethylenediamine. , Hexamethylenediamine, 1,5-pentanediamine, 2-methylpentamethylenediamine, nonamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, metaxylenediamine, paraxylenediamine, 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5 5-trimethylcyclohexa , Bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane, 2,2-bis (4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperazine, etc. , Cycloaliphatic, aromatic diamines, and adipic acid, speric acid, azelaic acid, sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid Examples include aliphatic, alicyclic, and aromatic dicarboxylic acids such as acid, 5-sodium sulfoisophthalic acid, 2,6-naphthalenedicarboxylic acid, hexahydroterephthalic acid, and hexahydroisophthalic acid. Each of nylon homopolymers or copolymers derived from It can be used alone or in the form of mixtures.

  In the present invention, the other polyamide resin is preferably a polyamide resin having a melting point of 150 ° C. or more and excellent in heat resistance and strength. Specific examples include polycaproamide (nylon 6), polypentamethylene adipamide (nylon 56), polytetramethylene adipamide (nylon 46), polyhexamethylene sebamide (nylon 610), polyhexa Methylene dodecanamide (nylon 612), polyundecanamide (nylon 11), polydodecanamide (nylon 12), polycaproamide / polyhexamethylene terephthalamide copolymer (nylon 6 / 6T), polyhexamethylene adipamide / polyhexa Methylene isophthalamide copolymer (nylon 66 / 6I), polyhexamethylene terephthalamide / polyhexamethylene isophthalamide copolymer (nylon 6T / 6I), polyhexamethylene terephthalamide / polydodecanamide copolymer ( Iron 6T / 12), polyhexamethylene adipamide / polyhexamethylene terephthalamide / polyhexamethylene isophthalamide copolymer (nylon 66 / 6T / 6I), polyxylylene adipamide (nylon XD6), polyhexamethylene terephthalamide / Poly-2-methylpentamethylene terephthalamide copolymer (nylon 6T / M5T), polynonamethylene terephthalamide (nylon 9T), and mixtures thereof.

  The molecular weight of the polyamide resin used in the present invention is not particularly limited, but the relative viscosity of a solution dissolved in 98% concentrated sulfuric acid at a concentration of 1 g / dl is in the range of 1.8 to 5.0 at 25 ° C. preferable. More preferably, it is in the range of 1.8 to 4.0 from the viewpoint of fluidity of the resulting resin composition.

  In this invention, it is necessary to contain 10-30 weight part of (B) triazine type compound with respect to 100 weight part of (A) polyamide resin. By blending a triazine compound, high glow wire properties and flame retardancy can be obtained.

  The (B) triazine compound used in the present invention is a compound containing a nitrogen element and having a triazine skeleton, and is known as a flame retardant that can be blended with a thermoplastic resin to impart flame retardancy. It is a compound. Specific examples include melamine, melem, melam, melon, and their salts with cyanuric acid, cyanuric acid, and mixtures thereof. A typical example of the salt is melamine cyanurate. As the (B) triazine compound used in the present invention, melamine cyanurate is particularly preferable from the viewpoint of heat resistance and good miscibility with the polyamide resin. (B) The average particle size of the triazine compound is preferably 15 μm or less, more preferably 10 μm or less, and particularly preferably 5 μm or less. If the average particle diameter is 15 μm or less, the toughness at the time of water absorption is further improved. In addition, an average particle diameter is the number average particle diameter computed from the value measured according to JISK5600-9-3 (2006).

  In the present invention, it is practically preferable to blend 0.1 to 1.0 parts by weight of the polycondensate of (C) a diamine compound and a fatty acid compound with respect to 100 parts by weight of the (A) polyamide resin. By blending a polycondensate of a diamine compound and a fatty acid compound, the releasability is greatly improved, and a molded product having a thinner and complex shape can be easily obtained. More preferably, it is in the range of 0.3 to 0.9 parts by weight from the balance of appearance, mechanical properties and glow wire property of the molded product. Examples of the diamine compound include ethylenediamine, tetramethylenediamine, hexamethylenediamine, 1,5-pentanediamine, 2-methylpentamethylenediamine, nonamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, metaxylenediamine, paraxylenediamine and the like, and ethylenediamine is preferred. Examples of the fatty acid compound include sebacic acid, stearic acid, adipic acid, speric acid, and azelaic acid, and sebacic acid and stearic acid are preferable.

  In the polyamide resin composition of the present invention, other polymers, copper-based heat stabilizers, hindered phenol-based, phosphorus-based, sulfur-based antioxidants, heat stabilizers, etc., as long as the object of the present invention is not impaired. One or more usual additives such as ultraviolet absorbers, lubricants, other mold release agents, antistatic agents, and coloring agents including dyes and pigments can be added.

  From the polyamide resin composition of the present invention, a molded product having excellent glow wire properties can be obtained. Specifically, in a test in accordance with IEC60695-2-13, the glow wire ignition temperature is preferably 775 ° C. or higher, more preferably 800 ° C. or higher at product thicknesses of 0.75 mm, 1.5 mm, and 3 mm. More preferably, it is 825 ° C. or higher. The glow wire ignition temperature is called GW-IT (Glow Wire Ignition Temperature), and the wire heated to a desired temperature is pressed against a resin molded product having a specified thickness and does not ignite or within 5 seconds after ignition. The temperature at which the fire is extinguished.

  There is no restriction | limiting in particular in the manufacturing method of the polyamide resin composition of this invention, For example, the method of melt-kneading at the temperature of 220-330 degreeC using kneading machines, such as a monoaxial or biaxial extruder and a kneader, etc. are mentioned. Moreover, since the flame retardant such as the (B) triazine compound exhibits a higher flame retardant effect as its dispersibility becomes better, a production method in which it is blended simultaneously with the resin component is preferable.

  The polyamide resin composition of the present invention can be easily molded by ordinary methods such as injection molding, extrusion molding, blow molding, etc. The obtained molded product has excellent moldability, glow wire characteristics, toughness, flame retardancy Excellent in electrical properties and electrical characteristics, and suitable for electrical and electronic parts, automobile parts and the like. In addition, since it is particularly excellent in glow wire characteristics, toughness, flame retardancy, and electrical characteristics, which are characteristics required for electrical and electronic parts, it is suitable for connector parts.

  By using these parts as molded products formed by molding the polyamide resin composition of the present invention, excellent moldability, appearance, high flame retardancy, and excellent glow wire that could not be achieved in the past And parts having excellent tracking resistance can be obtained, which is suitable for these applications.

  Molded articles using the polyamide resin composition of the present invention are liquid crystal televisions, plasma displays, PDAs, small televisions, radios, notebook computers, personal computers, printers, scanners, personal computer peripherals, video decks, DVD decks, CD decks, MDs. Deck, DAT deck, amplifier, cassette deck, portable CD player, portable MD player, digital camera, home phone, office phone, toys, medical equipment, rice cooker parts, microwave oven parts, acoustic parts, lighting parts, refrigerator parts Particularly suitable for connectors used in air conditioner parts, facsimile parts, and copier parts

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not limited by these. Measurement methods used in Examples and Comparative Examples are shown below.

(1) Toughness According to ISO1874-2, the pellets obtained in the examples and comparative examples were subjected to a cylinder temperature of 300 ° C., a mold surface temperature of 100 ° C., and a screw rotation speed by an injection molding machine PS60 manufactured by Nissei Plastic Industry Co., Ltd. Injection molding was carried out under the conditions of 150 rpm, parallel part flow rate 200 mm / sec, injection / cooling = 20/20 sec, ISO Type-A standard test specimens were molded, and the obtained test specimens were vacuum-sealed in aluminum moisture-proof bags. . Using this test piece, measurement was performed according to the following standard method.
Tensile breaking strain: ISO 527-1, -2
The physical properties at the time of 3% water absorption were measured in the same manner when the test piece was immersed in warm water at 60 ° C., the water absorption was determined by the weight change of the test piece, and the value reached 3%.

(2) Flame retardancy Using the pellets obtained in the examples and comparative examples, the flame retardancy was measured according to the method of UL94 (standard established by Under Writer Laboratories Inc., USA).

(3) Glow wire ignition temperature (GW-IT)
The pellets obtained in the examples and comparative examples were subjected to a cylinder temperature of 280 ° C., a mold surface temperature of 80 ° C., a screw rotation speed of 150 rpm, an injection pressure of 100 MPa, and an injection speed of 100 mm using an injection molding machine NEX1000 manufactured by Nissei Plastic Industry. / Second, injection / cooling = 20/20 seconds, injection molding was performed, and a test piece of 80 × 80 × corresponding thickness (mm) was molded. Using the obtained test piece, it was measured with a molded product of 80 × 80 × corresponding thickness (mm) according to IEC60695-2-13.

(4) Tracking resistance The pellets obtained in the examples and comparative examples were injected into a cylinder temperature of 280 ° C., a mold surface temperature of 80 ° C., a screw rotation speed of 150 rpm, by an injection molding machine NEX1000 manufactured by Nissei Plastic Industry Co., Ltd. Injection molding was performed under the conditions of a pressure of 100 MPa, an injection speed of 100 mm / sec, and an injection / cooling = 20/20 sec, and 80 × 80 × 3 mm test pieces were molded. It measured based on UL746A using the obtained test piece.

(5) Releasability The pellets obtained in the examples and comparative examples were subjected to a cylinder temperature of 280 ° C., a mold surface temperature of 80 ° C., a screw rotation speed of 150 rpm, an injection pressure of 100 MPa, and an injection speed of 100 mm / sec. And injection / cooling = 20/20 seconds were injection-molded to form a box-shaped product having a size of 25 × 25 × 25 (mm) and a thickness of 1 mm. The load applied to the ejector plate at the time of mold release was measured with a load cell, and this value was taken as the mold release force.

Reference Example 1 (A1) Copolymerized polyamide resin ε-caprolactam 95.0% by weight, hexamethylenediamine and 5.0% by weight of adipic acid salt were dissolved in pure water, and water added at 1% by weight was polymerized. The raw material thus obtained was sent to a polymerization tower. The raw materials were reacted while adjusting the temperature of the polymerization tower with a heater attached to the upper part, middle part, and lower part of the polymerization tower. The polymer discharged into the water bath was pelletized with a strand cutter, and the obtained pellets were subjected to hot water extraction at 95 ° C./20 h / bath ratio 20 times to remove unreacted raw materials and oligomers. After extraction, it was dried under reduced pressure at 80 ° C./30 h to obtain (A1) a copolymerized polyamide resin. Relative viscosity with 98% sulfuric acid according to JIS-K6810: 2.75.

Reference Example 2 (A2) Copolymerized polyamide resin 97.0% by weight of an equimolar salt of hexamethylenediamine and adipic acid and 3.0% by weight of ε-caprolactam were put into a polymerization can, and the water content became 45% by weight. Thus, water was added and the inside of the polymerization can was replaced with N ₂ , and then the temperature was raised to 260 ° C. Subsequently, the pressure was controlled and polymerized at 1.7 MPa for 1 hour, and then discharged and cut to obtain a copolymer polyamide resin (A2). Relative viscosity with 98% sulfuric acid according to JIS-K6810: 2.60.

Reference Example 3 (A3) Polyhexamethylene adipamide resin Polyamide 66 (“Amilan” (registered trademark) CM3001N: 96% sulfuric acid method viscosity value 145 ml / g, manufactured by Toray Industries, Inc.) was used.

Reference example 4 (B) Triazine type compound Italmatch company make: MC25 (melamine cyanurate) was used. In addition, it was 4 micrometers when the average particle diameter (number average value) was measured according to JISK5600-9-3.

Reference Example 5 Melamine cyanurate having a large particle size Melamine cyanurate obtained from the market was sieved with a vibrating sieve using a mesh having an opening of 15 μm, and the one remaining on the mesh was used.

Reference Example 6 (C) Polycondensate of diamine compound and fatty acid compound Kyoeisha Chemical Co., Ltd. product: WH215 (polycondensate of ethylenediamine, sebacic acid and stearic acid) was used.

[Examples 1 to 3]
Using (A1) copolymerized polyamide resin shown in Reference Example 1 and (B) triazine-based compound shown in Reference Example 4, a cylinder using a compounding amount twin-screw extruder shown in Table 1 (manufactured by Toshiba Machine Co., Ltd .: TEM58) Top feed (base feed) was performed under the conditions of a preset temperature of 290 ° C. and a screw rotation speed of 200 rpm, melt kneading, forming a strand-shaped gut, cooling with a cooling bath, and granulating with a cutter to obtain pellets. Using the obtained pellets, various characteristics were examined by the above evaluation method. The results are shown in Table 1.

[Examples 4 to 13]
(A1) copolymerized polyamide resin shown in Reference Example 1, (A2) copolymerized polyamide resin shown in Reference Example 2, and (B) triazine-based compound shown in Reference Example 4 in the blending amounts shown in Tables 1-2. In the same manner as in Example 1, pellets were obtained and examined for various characteristics. The results are shown in Tables 1-2.

[Example 14]
Pellets were obtained in the same manner as in Example 2 except that the (B) triazine compound shown in Reference Example 4 was changed to the large particle size melamine cyanurate shown in Reference Example 5, and various properties were examined. The results are shown in Table 2.

[Example 15]
(A1) Copolymerized polyamide resin shown in Reference Example 1, (A3) Polyhexamethylene adipamide resin shown in Reference Example 3, and (B) Triazine compound shown in Reference Example 4 are shown in Table 2. Then, pellets were obtained in the same manner as in Example 1 and various characteristics were examined. The results are shown in Table 2.

[Examples 16 to 17]
(A1) copolymerized polyamide resin shown in Reference Example 1, (A2) copolymerized polyamide resin shown in Reference Example 2, (B) triazine compound shown in Reference Example 4, (C) shown in Reference Example 6 The polycondensate of a diamine compound and a fatty acid compound was blended in the amounts shown in Table 2, and pellets were obtained in the same manner as in Example 1 to examine various properties. The results are shown in Table 2.

[Example 18]
(A1) Copolyamide resin shown in Reference Example 1, (A3) Polyhexamethylene adipamide resin shown in Reference Example 3, (B) Triazine compound shown in Reference Example 4, shown in Reference Example 6 (C) The polycondensate of a diamine compound and a fatty acid compound was blended in the amounts shown in Table 2, and pellets were obtained in the same manner as in Example 1 to examine various properties. The results are shown in Table 2.

[Comparative Examples 1-2]
(A1) Copolymer polyamide resin shown in Reference Example 1 and (B) Triazine compound shown in Reference Example 4 were blended in the amounts shown in Table 3, and pellets were obtained in the same manner as in Example 1 to examine various properties. It was. The results are shown in Table 3.

[Comparative Examples 3 to 4]
(A2) Copolyamide resin shown in Reference Example 2 and (B) Triazine compound shown in Reference Example 4 were blended in the amounts shown in Table 3, and pellets were obtained in the same manner as in Example 1 to examine various properties. It was. The results are shown in Table 3.

[Comparative Example 5]
(A1) Copolymerized polyamide resin shown in Reference Example 1, (A3) Polyhexamethylene adipamide resin shown in Reference Example 3, and (B) Triazine compound shown in Reference Example 4 are shown in Table 3. Then, pellets were obtained in the same manner as in Example 1 and various characteristics were examined. The results are shown in Table 3.

[Comparative Example 6]
(A3) hexamethylene adipamide resin shown in Reference Example 3 and (B) triazine-based compound shown in Reference Example 4 were blended in the amounts shown in Table 3 to obtain pellets in the same manner as in Example 1 and various properties. I investigated. The results are shown in Table 3.

Claims (11)

(A1) containing (a1) 50% by weight to caproamide unit of 50% by weight or more and less than 98% by weight and (a2) a copolymer polyamide containing 2% by weight or more and less than 50% by weight of hexamethylene adipamide unit (A) to 100 parts by weight of polyamide resin (B) A polyamide resin composition comprising 10 to 30 parts by weight of a triazine compound. (A) The polyamide resin further comprises (A2) (a1) a copolymer polyamide of 2 to 50% by weight of caproamide units and (a2) 50 to 98% by weight of hexamethylene adipamide units. The polyamide resin composition according to claim 1, wherein The polyamide resin composition according to claim 2, wherein the ratio of (A1) to (A2) is (A1) / (A2) = 15/85 to 85/15. The polyamide resin composition according to any one of claims 1 to 3, wherein the (A) polyamide resin further comprises (A3) a polyhexamethylene adipamide resin. The polyamide resin composition according to claim 4, wherein a weight ratio of (A1) to (A3) is (A1) / (A3) = 10/90 to 90/10. The polyamide resin composition according to claim 1, wherein the triazine compound is melamine cyanurate. The polyamide resin composition according to claim 6, wherein the average particle size of melamine cyanurate is 15 µm or less. (A) The polycondensate of (C) a diamine compound and a fatty acid compound is blended in an amount of 0.1 to 1.0 part by weight with respect to 100 parts by weight of the polyamide resin. Any one of the polyamide resin compositions. A molded article formed by molding the polyamide resin composition according to any one of claims 1 to 8 by at least one method selected from injection molding, extrusion molding, and blow molding. The molded article according to claim 9, wherein the molded article is a casing, an exterior part, or a connector. The molded article according to claim 9 or 10, wherein, in a test based on IEC60695-2-13, the glow wire ignition temperature is 775 ° C or higher in all of the product thicknesses of 0.75 mm, 1.5 mm, and 3 mm.