KR20230046157A - High performance polyamide resin composition for electrical and thermal conductive material and molded article including the same - Google Patents

Abstract

The present invention relates to a polyamide resin composition having excellent electrical and thermal conductivity and a molded article made of the same. The polyamide resin composition having excellent electrical and thermal conductivity includes polyamide 6, polyphthalamide, a carbon-based hybrid filler, and a silane coupling agent. The molded article is made of an electrically and thermally conductive polyamide resin composition. The present invention has excellent mechanical properties and heat resistance.

Description

Polyamide resin composition with excellent electrical and thermal conductivity and molded article made of the same

It relates to a polyamide resin composition and a molded article made of the same.

Recently, as vehicle electric parts and electronic parts are miniaturized and high-performance, malfunctions or failures of devices due to heat generated during driving of the devices are increasing. Accordingly, a technology of adding metal additives such as aluminum is being applied to increase the thermal conductivity or heat dissipation characteristics of the parts, but there are disadvantages in that the weight increases compared to plastic, the unit price increases due to the post-processing process, and the degree of design freedom decreases. . In order to overcome this, technologies for applying various fillers to impart thermal conductivity to plastic materials are being developed, but it is difficult to simultaneously realize thermal conductivity, processability, mechanical properties, etc., and relatively low thermal conductivity and poor moldability. Inexpensive materials are being used.

Provided are a polyamide resin composition having high electrical conductivity and thermal conductivity, excellent flowability, excellent processability and moldability, and excellent mechanical properties and heat resistance, and a molded article made of the same.

In one embodiment, a polyamide resin composition including polyamide 6, polyphthalamide, a carbon-based hybrid filler, and a silane coupling agent and a molded article made of the same are provided.

A polyamide resin composition according to an embodiment and a molded product manufactured therefrom have high electrical conductivity and thermal conductivity, excellent flowability, excellent processability and moldability, excellent mechanical properties and heat resistance, etc., and various automotive electric parts. or suitable for application to electronic components.

Hereinafter, specific embodiments will be described in detail so that those skilled in the art can easily implement them. However, the present invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

Terms used herein are merely used to describe exemplary implementations and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

As used herein, “combination thereof” means a mixture of constituents, laminates, composites, copolymers, alloys, blends, reaction products, and the like.

The terms “comprise,” “comprise,” or “have” are intended to indicate that there is an embodied feature, number, step, component, or combination thereof, but that one or more other features, numbers, or steps are present. It should be understood that it does not preclude the possibility of existence or addition of components, components, or combinations thereof.

In addition, the particle size or average particle diameter may be measured by a method well known to those skilled in the art, for example, by measuring with a particle size analyzer, or by using a transmission electron microscope (TEM) photograph or a scanning electron microscope (SEM). It can also be measured with a microscope). Alternatively, the average particle diameter value can be obtained by measuring using the Dynamic Light Scattering method (DLS), performing data analysis, counting the number of particles for each particle size range, and then calculating from this. . Unless otherwise defined, the average particle diameter may mean the diameter (D50) of particles whose cumulative volume is 50% by volume in the particle size distribution.

One embodiment provides a polyamide resin composition including polyamide 6, polyphthalamide, a carbon-based hybrid filler, and a silane coupling agent. In general, in the case of a resin composition to which a carbon-based filler or the like is applied for electrical conductivity and thermal conductivity, physical properties such as processability and mechanical properties tend to deteriorate. However, the resin composition according to one embodiment has good electrical conductivity and thermal conductivity, and at the same time, excellent flowability, moldability, processability, etc., and can improve physical properties such as mechanical properties, such as various automotive electric parts or electronic parts, etc. suitable for application

polyamide 6

Polyamide 6 means a polyamide made of ε-caprolactam or 6-aminocaproic acid, and in some cases, other monomers may be copolymerized. Polyamide 6 has excellent mechanical strength, heat resistance, and excellent formability.

The relative viscosity of the "polyamide" 6 may be 1.8 to 3.4, for example, 2.0 to 3.0 or 2.0 to 2.8. Here, the relative viscosity may be measured with a viscometer by adding 1 g of polyamide 6 to 100 ml of 96% sulfuric acid at 20 ° C. When the relative viscosity of the polyamide 6 satisfies the above range, excellent mechanical strength can be exhibited and appropriate fluidity can be maintained during injection.

The amount of the amino end group of the polyamide 6 is not particularly limited, but may be 1.0 × 10 ⁻⁵ to 10.0 × 10 ⁻⁵ mol/g, in which case a moderate degree of polymerization can be obtained and mechanical strength and the like can be improved. .

The polyamide 6 may be prepared by a well-known method or a commercially available one may be selected and used.

The polyamide 6 may be included in an amount of 10 wt% to 60 wt% based on the total weight of the polyamide resin composition, for example, 20 wt% to 60 wt%, 25 wt% to 55 wt%, or 30 wt% to 60 wt%. 50% by weight. When polyamide 6 is included in such a range, it is possible to implement a resin composition having high electrical conductivity and thermal conductivity, excellent flowability, good processability and moldability, and excellent mechanical properties.

polyphthalamide

Polyphthalamide (PPA) is a type of aromatic polyamide, and can improve the flowability of the polyamide resin composition according to one embodiment, thereby improving injection performance, moldability, processability, etc., and furthermore, the composition of the composition mechanical properties can be improved. That is, when polyphthalamide is applied, not only the flowability of the resin composition is improved, but also the mechanical properties of the final composition can be improved even when the same amount of filler is used. In the case of using a separate additive for improving moldability in the prior art, there is a problem in that mechanical properties or other physical properties are deteriorated. In one embodiment, flowability is improved by applying polyphthalamide without a separate additive for moldability. At the same time, it can show the effect of improving other physical properties.

Polyamide may be referred to as a polymer of a diamine monomer and a dicarboxylic acid monomer, and the polyphthalamide may refer to a polyamide in which about 55 mol% or more of the dicarboxylic acid portion is an aromatic dicarboxylic acid. The aromatic dicarboxylic acid may be, for example, terephthalic acid, isophthalic acid, or a combination thereof. In the polyphthalamide, the dicarboxylic acid portion may consist only of aromatic dicarboxylic acids, or may contain both aromatic dicarboxylic acids and aliphatic dicarboxylic acids such as adipic acid.

The polyphthalamide is, for example, hexamethylenediamine, tetramethylenediamine, 2,4-dimethylhexamethylenediamine, dodeca methylenediamine, bis(4-aminocyclohexyl)methane, 4,4'-diaminodicyclo It may be a polymer or copolymer of at least one diamine monomer selected from hexylmethane, isophoronediamine and p-cyclohexylenediamine and at least one dicarboxylic acid monomer selected from isophthalic acid, terephthalic acid and adipic acid, wherein the above The dicarboxylic acid monomer may contain 55 mol% or more of an aromatic component such as isophthalic acid or terephthalic acid.

For example, in the total content of the dicarboxylic acid monomer of the polyphthalamide, the aromatic dicarboxylic acid monomer is 55 mol% to 100 mol%, 60 mol% to 90%, or 70 mol% to 80 mol%. 0 mol% to 45 mol%, 10 mol% to 40 mol%, or 20 mol% to 30 mol% of the aliphatic dicarboxylic acid monomer may be included.

The polyphthalamide is a specific example, PA 6T, PA 6I, PA 9T, PA 10T, PA10I, PA 6/6T, PA 66/6T, PADT/6T, PA 6/6I, PA 66/6I, PA 6T/6I , PA 6T/12, PA 66/6T/6I or combinations thereof.

The melting point of the polyphthalamide may be about 260 °C to 330 °C, for example, 280 °C to 300 °C, and the glass transition temperature of the polyphthalamide may be 110 °C to 150 °C. In addition, the polyphthalamide may have a density of about 1.00 g/cc or more, for example, 1.10 g/cc to 2.00 g/cc. The polyphthalamide may have a coefficient of thermal expansion (CTE) of 55.0 μm/m° C. to 70.0 μm/m° C. as measured by ISO 11359-1 at 23 to 55° C.

The polyphthalamide may be included in an amount of 0.1% to 10% by weight based on 100% by weight of the total polyamide resin composition, for example, 1% to 9% by weight, 2% to 8% by weight, or 3% by weight. % to 7% by weight. When included in such an amount, the polyamide resin composition may have improved flowability and exhibit excellent mechanical properties.

Carbon-based hybrid filler

The carbon-based hybrid filler may serve to improve electrical conductivity and thermal conductivity of the polyamide resin composition, and may be a mixture of two or more different carbon-based fillers. When the polyamide resin composition includes such a carbon-based hybrid filler, miscibility, thermal conductivity, and mechanical properties of the composition may be improved compared to a case where a general carbon-based filler is applied alone.

The carbon-based hybrid filler may include, for example, a first carbon-based filler and a second carbon-based filler. The first carbon-based filler and the second carbon-based filler may be of different types or may have different sizes or shapes.

The first carbon-based filler and the second carbon-based filler are each independently, for example, natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, soft carbon, hard carbon, mesophase pitch carbide, calcined coke, It may include carbon fiber, pitch-based carbon fiber (PCF), carbon nanotube (CNT), carbon nanoplate (CNP), or a combination thereof.

The first carbon-based filler and the second carbon-based filler may be each independently, for example, plate-shaped, flake-shaped, spherical, amorphous, powdery, or fibrous.

For example, the first carbon-based filler may be plate-like and the second carbon-based filler may be fibrous. In this case, the weight ratio of (first carbon-based filler):(second carbon-based filler) may be 10:90 to 95:5, for example, 20:80 to 95:5, 30:70 to 95:5, 40 :60 to 95:5, 50:50 to 95:5, 60:40 to 90:10, 60:40 to 80:20, or 70:30 to 80:20. In this case, the miscibility of the components in the polyamide resin composition is good, mechanical properties, electrical conductivity and thermal conductivity can be improved, and flowability can be improved.

For example, at least one of the first carbon-based filler and the second carbon-based filler may include a pitch-based carbon fiber. For example, the first carbon-based filler includes natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, carbon nanotubes, carbon nanoplates, or a combination thereof, and the second carbon-based filler is pitch-based carbon It may contain fibers. In this case, the first carbon-based filler may be included in 20 to 60% by weight and the second carbon-based filler may be included in 1 to 30% by weight based on the total weight of the polyamide resin composition, (first carbon-based filler): ( The weight ratio of the second carbon-based filler) may be 10:90 to 95:5, for example, 20:80 to 95:5, 30:70 to 95:5, 40:60 to 95:5, 50:50 to 95:5, 60:40 to 90:10, 60:40 to 80:20, or 70:30 to 80:20. In this case, the miscibility of the components in the polyamide resin composition is good, mechanical properties, electrical conductivity and thermal conductivity can be improved, flowability can be improved, and price competitiveness can be secured.

The carbon-based hybrid filler may be included in an amount of 30 wt% to 70 wt%, for example, 40 wt% to 70 wt%, 50 wt% to 70 wt%, etc., based on 100 wt% of the polyamide resin composition. there is. When the carbon-based hybrid filler is included in the above content range, electrical conductivity and thermal conductivity of the polyamide resin composition may be improved, and mechanical strength and heat resistance may be improved.

Silane coupling agent

The silane coupling agent according to one embodiment may serve to improve the miscibility of each component in the composition by improving the interfacial bonding force between the aforementioned resin component such as polyamide 6 and polyphthalamide and the carbon-based hybrid filler component.

The silane coupling agent may be a silane coupling agent commonly used in polyamide resins, for example, phenyltrimethoxysilane, phenyltriethoxysilane, hydroxyphenyltrimethoxysilane, hydroxyphenyltriethoxysilane , phenylaminotrimethoxysilane, phenylaminotriethoxysilane, methacryloyloxypropyltrimethoxysilane, methacryloyloxypropyltriethoxysilane, acryloyloxypropyltrimethoxysilane, acryloyl It may be oxypropyltriethoxysilane, or a combination thereof, but is not limited thereto.

The silane coupling agent is a specific example, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyl methyldimethoxysilane, 3-glycidoxypropyl trimethoxysilane, 3-glycidoxy Sidoxypropyl methyldiethoxysilane, 3-glycidoxypropyl triethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyl Trimethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyltributoxysilane, N-2-(aminoethyl)- 3-aminopropylmethyldiethoxysilane, N-2-(aminoethyl)-3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyl Dimethoxysilane, 3-aminopropyldimethylmethoxysilane, 3-aminopropyldimethylethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N-(1,3 dimethyl-butylidene) Propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N-(vinylbenzyl)-2-aminoethyl-3-aminopropyltrimethoxysilane = hydrochloride, 3-ureidopropyltrialkoxysilane, 3- isocyanatepropyltriethoxysilane, or a combination thereof.

The silane coupling agent may be included in an amount of 0.1% to 5% by weight based on 100% by weight of the polyamide resin composition, for example, 0.1% to 4% by weight, 0.1% to 3% by weight, or 0.1% to 3% by weight. 2 wt%, 0.1 wt% to 1 wt%, 0.1 wt% to 0.5 wt%, 0.5 wt% to 1 wt%, or 0.3 wt% to 0.7 wt%. When the silane coupling agent is included in this content range, the miscibility of each component in the polyamide resin composition is improved, and thus properties such as flowability, moldability, and mechanical properties may be improved.

Other Additives

The polyamide resin composition may further include other additives if necessary. The other additives may include, for example, a plasticizer, a photodegradation inhibitor, a flame retardant, a heat retardant, an antioxidant, a release agent, a dye, a pigment, a UV absorber, a nucleating agent, a lubricant, or a combination thereof.

The other additives may be included in an amount of 0% to 5% by weight based on the total weight of the polyamide resin composition, for example, 0% to 4% by weight, 0% to 3% by weight, or 0.1% to 2% by weight. %, or 0.1% to 1% by weight. In this case, the purpose of the additive can be achieved without affecting other physical properties.

The above-described polyamide resin composition has high electrical conductivity and thermal conductivity, good flowability, excellent formability and processability, and excellent mechanical strength, so it can be applied to various fields.

In one embodiment, a molded article made of the polyamide resin composition described above is provided. The molded article is a vehicle electric field It may be a housing of a part, an interior/exterior part of an automobile, or an electronic part. For example, the molded article may be a part for interior and exterior lighting of a vehicle. The molded article according to one embodiment can simultaneously implement excellent electrical insulation, thermal conductivity, formability, and mechanical properties.

Examples and comparative examples of the present invention are described below. The following examples are only examples of the present invention, and the present invention is not limited to the following examples.

Example 1

34% by weight of polyamide 6 (PA6, relative viscosity: 2.2), 5% by weight of polyphthalamide (PPA), 0.5% by weight of silane coupling agent, and 0.5% by weight of other additives such as antioxidants and heat-resistant agents are put into the main hopper .

45% by weight of plate-shaped natural graphite was put into a first side hopper, and 15% by weight of pitch-based carbon fiber (PCF) was put into a second side hopper to prepare a polyamide resin composition through a twin screw extruder.

The polyamide resin composition is extruded and cooled at a screw speed of 350 rpm while the extrusion temperature is varied from 265° C. to 300° C. to prepare pellets. The obtained pellets are introduced into an injection molding machine to produce a molded article in the form of a multi-purpose test piece.

Examples 2 to 3

A composition and a molded article were prepared in the same manner as in Example 1, except that the contents of polyamide 6 and polyphthalamide were changed as shown in Table 1.

Examples 4 to 6

A composition and a molded article were prepared in the same manner as in Example 1, except that the contents of natural graphite and pitch-based carbon fiber were changed as shown in Table 1 below.

Examples 7 to 8

A composition and a molded article were prepared in the same manner as in Example 1, except that the content of the silane coupling agent was changed as shown in Table 1 below.

PA6 PPAs Carbon-based hybrid filler Silane
coupling agent antioxidant lubricant Sum graphite PCF Example One 34 5 45 15 0.5 0.2 0.3 100 2 37 2 45 15 0.5 0.2 0.3 100 3 31 8 45 15 0.5 0.2 0.3 100 4 34 5 40 20 0.5 0.2 0.3 100 5 34 5 50 10 0.5 0.2 0.3 100 6 34 5 55 5 0.5 0.2 0.3 100 7 34.3 5 45 15 0.2 0.2 0.3 100 8 33.5 5 45 15 1.0 0.2 0.3 100

Comparative Example 1

polyphthalamide A composition and a molded article were prepared in the same manner as in Example 1, except that the content of each component was designed as shown in Table 2 below.

Comparative Examples 2 to 3

A composition and a molded article were prepared in the same manner as in Example 1, except that only one type of filler was independently used as shown in Table 2 without using a carbon-based hybrid filler.

Comparative Example 4

A composition and a molded article were prepared in the same manner as in Example 1, except that a silane coupling agent was not used and the content of each component was designed as shown in Table 2 below.

PA6 PPAs Carbon-based hybrid filler Silane antioxidant lubricant Sum graphite PCF coupling agent comparative example One 39 0 45 15 0.5 0.2 0.3 100 2 34 5 60 0 0.5 0.2 0.3 100 3 54 5 0 40 0.5 0.2 0.3 100 4 34.5 5 45 15 0 0.2 0.3 100

evaluation example

The tensile strength, flexural strength, flexural modulus, Izod impact strength, thermal conductivity, surface resistance and flowability of the molded articles prepared in Examples and Comparative Examples were evaluated by the following methods, and the results are shown in Table 3 below. .

Tensile strength is evaluated under the condition of 5 mm/min according to ISO 527.

Flexural strength and flexural modulus are evaluated by 3-point-bending at 25° C. at a speed of 2 mm/min according to ISO 178.

Izod impact strength was evaluated using an impact hammer of 2.75 J under the condition of 23 ° C. for a 3.2 mm thick specimen having a notch in the center of the specimen according to ISO 180.

For thermal conductivity, which is a heat dissipation characteristic, a specimen with a size of Φ25.4 mm X 1 mm (diameter X thickness) was prepared in accordance with ASTM E1461, and thermal diffusivity in the horizontal direction was evaluated at room temperature through a Laser Flash Analyzer (LFA). After measuring specific heat and density through DSC and density meter, thermal conductivity is calculated by multiplying three factors of thermal diffusivity, specific heat, and density.

Surface resistivity, which is an electrical characteristic, is evaluated by a 4-point probe method for a 2t-thick injection specimen in accordance with the JIS K7194 standard.

Flowability evaluation is evaluated by measuring the weight of the material discharged for 10 minutes by pressing with a load of 2.16 kg after exposing to a temperature of 280 ° C. for 5 minutes in accordance with the ASTM D1238 standard.

mechanical properties thermal conductivity
(In-Plane) electrical characteristics flow tensile strength flexural strength curve
elastic modulus IZOD
impact strength surface resistivity (MPa) (MPa) (MPa) (KJ/m ² ) (W/mK) (Ω/sq.) (g/10mins) line
city
yes One 100 145 35900 3 21.3 10 ^-1 2.5 2 95 139 34100 2.7 19.8 10 ⁰ 1.3 3 92 137 33200 3.1 20.1 10 ^-1 3.3 4 102 152 36100 3.2 21.6 10 ^-1 1.1 5 89 132 31800 2.4 20.3 10 ^-1 1.8 6 80 126 30700 2.2 19.7 10 ⁰ 1.9 7 95 136 33750 2.5 19.5 10 ⁰ 1.2 8 97 140 34300 2.9 20.2 10 ⁰ 1.7 rain
school
yes One 90 130 31500 2.8 20.5 10 ^-1 0.5 2 74 100 13270 2.4 19.2 10 ² 0.4 3 220 330 18500 6.8 18.4 10 ^-1 0.6 4 88 110 30000 2.2 20.1 10 ^-1 1.7

Referring to Table 3, in the case of Examples 1 to 8, mechanical properties such as tensile strength, flexural strength, flexural modulus, and Izod impact strength are excellent, thermal conductivity is sufficiently high, and surface resistivity is excellent compared to Comparative Examples 1 to 4. It can be seen that the low electrical conductivity is high, and at the same time, the flowability is excellent. On the other hand, in the case of Example 2, in which the polyphthalamide content is less than 5%, the effect of improving the flowability is somewhat insufficient, and the dispersibility of the carbon-based hybrid filler in the resin is lowered compared to Example 1, resulting in mechanical, thermal and flow properties. slightly decreased. In the case of Example 3 in which the content of polyphthalamide exceeds 5%, the flowability is improved, but compared to Example 1, the polyphthalamide is not sufficiently dispersed, so that the mechanical and thermal properties are somewhat reduced.

In addition, in the case of Example 7 in which the content of the silane coupling agent is less than 0.5%, the concentration is somewhat insufficient to improve the interfacial bonding force between the carbon-based hybrid filler and the resin, so the mechanical and thermal properties are reduced compared to Example 1, and the content of the silane coupling agent In the case of Example 8 exceeding 0.5%, the remaining coupling agent may act as an impurity, so it can be seen that the mechanical properties and thermal properties are slightly reduced compared to Example 1.

On the other hand, in the case of Comparative Example 1 without using polyphthalamide and Comparative Example 4 without using a silane coupling agent, compared to the resin composition of Examples, the flowability and interfacial bonding force between the resin and the carbon-based hybrid filler were lowered, It can be seen that the dispersibility of the carbon-based hybrid filler is lowered and thus the mechanical, thermal and flow characteristics are significantly reduced.

In addition, when graphite, which is a carbon-based filler, is used independently as in Comparative Example 2, it does not function as a reinforcing agent due to the morphological characteristics of the filler. As a result, mechanical and thermal properties are lowered compared to hybrid materials, and at the same time, solidification of the filler As a result, it can be seen that the flowability is rapidly reduced.

In addition, when the pitch-based carbon fiber, which is a carbon-based filler, is applied independently as in Comparative Example 3, the mechanical properties are improved, but the thermal conductivity is somewhat lower because the thermal conductive networking is not easy compared to the carbon-based hybrid filler, and the flow due to the fiber shape You can see that the quality has deteriorated.

Although the preferred embodiments have been described in detail, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts defined in the following claims are also within the scope of the present invention. it belongs

Claims (15)

polyamide 6;
polyphthalamide,
a carbon-based hybrid filler, and
A polyamide resin composition comprising a silane coupling agent. In paragraph 1,
With respect to 100% by weight of the polyamide resin composition,
10% to 60% by weight of polyamide 6;
0.1% to 10% by weight of polyphthalamide,
30% to 70% by weight of a carbon-based hybrid filler,
0.1% to 5% by weight of a silane coupling agent, and
A polyamide resin composition comprising 0% to 5% by weight of other additives. In paragraph 1,
With respect to 100% by weight of the polyamide resin composition,
20% to 50% by weight of polyamide 6;
3% to 7% by weight of polyphthalamide,
40% to 70% by weight of a carbon-based hybrid filler,
0.3% to 0.7% by weight of a silane coupling agent, and
A polyamide resin composition comprising 0% to 3% by weight of other additives. In paragraph 2,
The other additive is a polyamide resin composition comprising a plasticizer, a photodegradation inhibitor, a flame retardant, a heat resistance agent, an antioxidant, a release agent, a dye, a pigment, a UV absorber, a nucleating agent, a lubricant, or a combination thereof. In paragraph 1,
The relative viscosity of the polyamide 6 is 1.8 to 3.4 polyamide resin composition. In paragraph 1,
The polyphthalamide is PA 6T, PA 6I, PA 9T, PA 10T, PA10I, PA 6/6T, PA 66/6T, PADT/6T, PA 6/6I, PA 66/6I, PA 6T/6I, PA 6T /12, PA 66/6T/6I, or a polyamide resin composition comprising a combination thereof. In paragraph 1,
The polyphthalamide is a polyamide resin composition having a melting point of 260 ° C to 330 ° C, and / or a glass transition temperature of 110 ° C to 150 ° C. In paragraph 1,
The carbon-based hybrid filler includes two or more different carbon-based fillers, and includes a first carbon-based filler and a second carbon-based filler,
The first carbon-based filler is plate-shaped,
The second carbon-based filler is a fibrous polyamide resin composition. In paragraph 8,
A polyamide resin composition in which the weight ratio of (first carbon-based filler):(second carbon-based filler) is 40:60 to 95:5. In paragraph 1,
The carbon-based hybrid filler includes two or more different carbon-based fillers, and includes a first carbon-based filler and a second carbon-based filler,
A polyamide resin composition wherein at least one of the first carbon-based filler and the second carbon-based filler includes a pitch-based carbon fiber; In paragraph 10,
The first carbon-based filler includes natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, carbon nanotubes, carbon nanoplates, or a combination thereof,
The second carbon-based filler is a polyamide resin composition comprising a pitch-based carbon fiber. In paragraph 11,
A polyamide resin composition in which the weight ratio of (first carbon-based filler):(second carbon-based filler) is 40:60 to 95:5. In paragraph 11,
A polyamide resin composition in which the weight ratio of (first carbon-based filler): (second carbon-based filler) is 70:30 to 80:20. A molded article made of the polyamide resin composition according to any one of claims 1 to 13. In paragraph 14,
The molded article is a housing of a vehicle electric component, an automobile interior or exterior component, or an electronic component.