KR102321899B1 - Glass long fiber reinforced thermoplastic resin composition for foam molding and battery pack housing manufactured using the same - Google Patents

Abstract

The present invention relates to a glass long fiber-reinforced thermoplastic resin composition for foaming injection molding, and a battery pack housing obtained by using the same. Particularly, the present invention relates to glass long fiber-reinforced thermoplastic resin composition for foaming injection molding, including: (A) 30-70 wt% of a polyamide-6 polymer; (B) 20-60 wt% of a planar glass long fiber reinforcing agent; (C) 1-5 wt% of an isocyanate silane-based coupling agent; (D) 1-5 wt% of sodium bicarbonate as an inorganic chemical foaming agent; and (E) 0.1-2 wt% of an aminoquinone-based nucleating agent. The present invention also relates to a molded product obtained by using the composition. The glass long fiber-reinforced thermoplastic resin composition for foaming injection molding according to the present invention shows excellent rigidity and foaming property, a light weight and high durability, and thus can minimize deformation after foaming injection molding to provide excellent stability. Therefore, the glass long fiber-reinforced thermoplastic resin composition for foaming injection molding according to the present invention can be used advantageously for manufacturing automotive parts or materials.

Description

Glass long fiber reinforced thermoplastic resin composition for foam injection and battery pack housing manufactured using same

The present invention relates to a long glass fiber reinforced thermoplastic resin composition for foam injection and a battery pack housing manufactured using the same, and more particularly, to a polyamide material, a glass long fiber reinforcing agent, an isocyanate silane coupling agent, sodium bicarbonate and aminoquinone based A glass long fiber reinforced thermoplastic resin composition for foaming injection, which contains a nucleating agent, has excellent rigidity and foaming performance, and at the same time has excellent lightness and durability, as well as excellent stability by minimizing deformation after foam injection molding, and It relates to a molded article manufactured using the same.

The automobile industry is in a trend to meet the needs for light weight, high quality, and environment-friendly environment. In particular, in recent years, research on materials for electric vehicles, including batteries, is being actively conducted in line with the spread of electric vehicles.

On the other hand, in the case of an electric vehicle having a lower buffer distance than that of an internal combustion engine vehicle, there is a great need for increasing battery efficiency and reducing material weight. Among battery-related parts, a battery pack upper cover is an upper housing of a pack that surrounds a battery module assembly, and a metal material such as aluminum is widely used. However, the battery pack upper cover using such aluminum has a problem of reducing the fuel efficiency of the vehicle due to its heavy weight, and in the case of a battery where thermal management is important due to the high thermal conductivity of aluminum compared to plastic, a separate process for implementing insulation performance There is an inconvenience of having to do it.

Therefore, as a way to solve the problems of conventional metal materials such as aluminum, it is necessary to develop a plastic composite resin for foam injection for light weight and heat insulation.

Republic of Korea Patent Registration 10-1816434

Accordingly, the present inventors completed the present invention by developing a new long glass fiber reinforced thermoplastic resin composition for foaming injection that has excellent rigidity and foaming performance, is excellent in light weight and durability, and can minimize deformation after foam injection molding and also has excellent stability. did.

Accordingly, an object of the present invention is, (A) 30 to 70% by weight of a polyamide-6 polymer, (B) 20 to 60% by weight of a flat glass long fiber reinforcing agent, (C) 1 to 5% by weight of an isocyanate silane coupling agent, ( D) To provide an injection-molded glass long fiber reinforced thermoplastic resin composition comprising 1 to 5 wt% of a sodium bicarbonate inorganic chemical foaming agent, and (E) 0.1 to 2 wt% of an amino quinone-based nucleating agent.

Another object of the present invention is to provide a molded article prepared by including the foamed injection-type glass long fiber reinforced thermoplastic resin composition of the present invention.

In order to achieve the above object, the present invention provides (A) 30 to 70% by weight of a polyamide-6 polymer, (B) 20 to 60% by weight of a flat glass long fiber reinforcing agent, (C) an isocyanate silane coupling agent 1 to 5% by weight, (D) 1 to 5% by weight of a sodium bicarbonate inorganic chemical foaming agent, and (E) an aminoquinone-based nucleating agent 0.1 to 2% by weight It provides a foamed injection-type glass long fiber reinforced thermoplastic resin composition.

In one embodiment of the present invention, the polyamide-6 polymer may have a number average molecular weight of 20,000 to 70,000.

In one embodiment of the present invention, the flat glass long fiber reinforcing agent may have a short side length of 3 to 15 μm in a cross section of a glass fiber, a flatness of 2 to 5, and a fiber length of 5 to 15 mm.

In one embodiment of the present invention, the flat glass long fiber reinforcing agent may include a sizing agent in an amount of 0.1 to 3 wt% based on the weight of the flat glass long fiber reinforcing agent.

In one embodiment of the present invention, the sizing agent may be at least one selected from the group consisting of a urethane resin, an acrylic resin, a styrene resin, and an epoxy resin.

In one embodiment of the present invention, the isocyanate silane-based coupling agent may be tris-(3-(trimethoxysilyl)propyl)isocyanurate.

In one embodiment of the present invention, the sodium bicarbonate inorganic chemical foaming agent may be sodium bicarbonate (Sodium Bicarbonate).

In one embodiment of the present invention, the aminoquinone-based nucleating agent may be 1,4,5,8-tetraaminoanthraquinone (1,4,5,8-Tetraaminoanthraquinone).

In addition, the present invention provides a molded article prepared by including the foamed injection-type glass fiber reinforced thermoplastic resin composition of the present invention.

In one embodiment of the present invention, the molded article may be an interior material for automobiles.

The present invention relates to (A) 30 to 70% by weight of a polyamide-6 polymer, (B) 20 to 60% by weight of a flat glass long fiber reinforcing agent, (C) 1 to 5% by weight of an isocyanate silane-based coupling agent, (D) sodium bi The present invention relates to a foamed injection-type glass fiber reinforced thermoplastic resin composition comprising 1 to 5% by weight of a carbonate inorganic chemical foaming agent and (E) 0.1 to 2% by weight of an aminoquinone-based nucleating agent, and a molded article prepared by using the composition, the present invention The foamed injection-type glass long fiber reinforced thermoplastic resin composition according to the present invention has excellent rigidity and foaming performance, excellent light weight and durability, and can minimize deformation after foam injection molding and thus has excellent stability. Therefore, the glass long fiber reinforced thermoplastic resin composition for foam injection of the present invention can be usefully used in the manufacture of automotive parts or materials.

The present invention is characterized by providing a new long glass fiber reinforced thermoplastic resin composition for foaming injection which has excellent rigidity and foaming performance, is excellent in light weight and durability, and can minimize deformation after foaming injection molding and also has excellent stability.

Specifically, the new long glass fiber reinforced thermoplastic resin composition for foam injection according to the present invention comprises: (A) 30 to 70 wt% of polyamide-6 polymer, (B) 20 to 60 wt% of flat glass long fiber reinforcing agent, (C) 1 to 5% by weight of an isocyanate silane coupling agent, (D) 1 to 5% by weight of a sodium bicarbonate inorganic chemical foaming agent, and (E) 0.1 to 2% by weight of an amino quinone-based nucleating agent.

The polyamide-6 polymer included in the composition of the present invention may have a number average molecular weight of 20,000 to 70,000 g/mol, and may be used alone or by mixing two or more polyamide-6 polymers having different molecular weights. . Preferably, a number average molecular weight of 50,000 may be used.

When the polyamide-6 polymer having a number average molecular weight of less than 20,000 is used, there is a problem in that the tensile strength is lowered. On the other hand, when the number average molecular weight exceeds 70,000, the impact strength is lowered, This can lead to unformed problems.

In addition, the polyamide-6 polymer of the present invention may be included in an amount of 30 to 70% by weight based on the total weight of the resin composition. If the content of the polyamide-6 polymer is less than 30 wt%, impact resistance may be reduced, and if the content exceeds 70 wt%, mechanical strength may be reduced. Preferably, the polyamide-6 polymer may be included in an amount of 50 to 60 wt%, more preferably 53 wt%, based on the total weight of the resin composition.

In an embodiment of the present invention, as the polyamide-6 polymer, 53 wt% of a polyamide-6 polymer having a number average molecular weight of 50,000 obtained by ring-opening polymerization of ε-caprolactam was used based on the total weight of the resin composition.

The flat glass long fiber reinforcing agent included in the composition of the present invention may be contained in an amount of 20 to 60 wt % based on the total weight of the resin composition, and the flat glass long fiber reinforcing agent has a short side length of 3 to 15 μm in the cross section of the glass fiber, , the flatness is 2 to 5, and the fiber length may be 5 to 15mm. Here, if the short side length is less than 3 μm, a problem that the dispersibility of the fiber may be reduced may occur, whereas if it exceeds 15 μm, mechanical properties and impact resistance may be deteriorated.

If the flat glass long fiber reinforcing agent is contained in an amount of less than 20% by weight based on the total weight of the resin composition of the present invention, mechanical strength and impact resistance may be reduced, whereas if it exceeds 60% by weight, it is difficult to reduce the weight. have.

Preferably, the flat glass long fiber reinforcing agent may be included in an amount of 30 to 50% by weight based on the total weight of the resin composition, and more preferably, it may be used in an amount of 40% by weight.

In addition, the flat glass long fiber reinforcing agent according to the present invention may further include a sizing agent, and the sizing agent may be contained in an amount of 0.1 to 3 wt % based on the weight of the flat glass long fiber reinforcing agent.

Here, if the content of the sizing agent is less than 0.1% by weight based on the weight of the flat glass long fiber reinforcing agent, the dispersibility of the fibers may be lowered and thus the mechanical strength may be reduced, and if it exceeds 3% by weight, the sizing agent may have a mechanical strength of the resin itself can lower The resin that can be used as the sizing agent is not limited thereto, but at least one selected from the group consisting of a urethane resin, an acrylic resin, a styrene resin, and an epoxy resin may be used.

The silane-based coupling agent included in the composition of the present invention serves to impart mechanical strength and impact resistance by improving compatibility between the polyamide-6 polymer and the flat glass long fiber reinforcing agent.

The silane-based coupling agent used in the present invention may be contained in an amount of 1 to 5% by weight based on the total weight of the resin composition of the present invention as an isocyanate silane-based coupling agent, and if the isocyanate-silane-based coupling agent contains less than 1% by weight If it is, mechanical strength and impact resistance may be reduced, and compatibility may be deteriorated. will do

Therefore, it is important to contain the isocyanate silane-based coupling agent in an amount of 1 to 5% by weight based on the total weight of the resin composition of the present invention, and preferably, the isocyanate-silane-based coupling agent is tris-(3-(trimethoxysilyl)propyl) Isocyanurate (Tris-(3(trimethoxysilyl)propyl)isocyanurate) may be used in an amount of 3% by weight.

The coupling agent has two or more different functional groups in the molecule, thereby increasing the compatibility between the inorganic filler and the resin in the polymer. However, the degree of compatibility is different depending on the type of resin or the type and content of the coupling agent, which can be confirmed through mechanical properties of the composite resin and deformation after injection. In this regard, even looking at the results of Example 1 and Comparative Example 3 of the present invention, it was confirmed that the selective use of Tris-(3(trimethoxysilyl)propyl)isocyanurate was superior to that of using other types of coupling agents.

In addition, the resin composition of the present invention may contain a foaming agent in an amount of 1 to 5% by weight based on the total weight of the resin composition, and the foaming agent may use sodium bicarbonate as an inorganic chemical foaming agent.

Here, when the sodium bicarbonate is used in an amount of less than 1% by weight, there is a problem in that the foaming performance is lowered, whereas when it is used in excess of 5% by weight, there is a problem in that mechanical properties are lowered.

In addition, the resin composition of the present invention may contain an aminoquinone-based nucleating agent in an amount of 0.1 to 2% by weight.

The amino quinone-based nucleating agent may be used for the purpose of resolving gas marks on the injection surface due to foaming during injection processing and rigidity, heat resistance. In the present invention, 1,4,5,8-tetraaminoanthraquinone (1,4,5,8-Tetraaminoanthraquinone) may be preferably used as the aminoquinone-based nucleating agent.

The nucleating agent promotes the crystallization of the polymer and serves to complement the mechanical properties. However, depending on the type of resin, the degree of implementation of the prepared composition according to the type and content of the nucleating agent has other differences. In this regard, in the results of Example 1 and Comparative Example 4, it was confirmed that the selective use of 1,4,5,8-Tetraaminoanthraquinone was superior to that of using other types of nucleating agents.

On the other hand, when the aminoquinone-based nucleating agent is used in an amount of less than 0.1 wt %, nucleation of the polyamide-6 resin may not be sufficiently achieved, and thus tensile strength and flexural strength may be reduced. In addition, if the aminoquinone-based nucleating agent is used in excess of 2% by weight, impact strength may be reduced.

Most preferably, the aminoquinone-based nucleating agent may contain 1,4,5,8-tetraaminoanthraquinone (1,4,5,8-Tetraaminoanthraquinone) in an amount of 1% by weight based on the total weight of the resin composition.

Furthermore, conventional additives may be further included in the expanded injection-type glass fiber reinforced thermoplastic resin composition according to the present invention. The additive may include an antioxidant and an antistatic agent, which may be contained within an appropriate content range. Here, as the antioxidant, at least one selected from the group consisting of phenolic antioxidants, phosphite-based antioxidants and thiodipropionate synergists may be used, and these or other additives are those of ordinary skill in the art. It can be easily used by the person.

In addition, the manufacturing method of the glass long fiber reinforced thermoplastic resin composition for foam injection of the present invention can be mixed using a general melt kneader such as a Bambari mixer, a single screw extruder, a twin screw extruder, a multi-wheel screw extruder, and a pultrusion machine, and after mixing It can be molded by a conventional foam injection molding process.

In the foam injection molding method, the supercritical gas is injected into the cylinder, mixed with the resin composition, and injected into the mold to form 40 ~ 80 ㎛ microbubbles inside the injection product. By the ultra-fine foam molding method can be molded. Alternatively, as the foam injection molding method, it may be molded by a molding method including injection molding including a chemical foaming agent. The present invention does not particularly limit the foam injection molding process and its conditions.

Furthermore, the present invention can provide a molded article manufactured using the glass long fiber reinforced thermoplastic resin composition for foam injection according to the present invention, and the molded article of the present invention can be used for manufacturing automobile parts, etc., specifically can be manufactured as an interior material for automobiles or as a battery pack housing.

On the other hand, the present inventors prepared different resin compositions by slightly different components used for preparing the resin composition with respect to the glass long fiber reinforced thermoplastic resin composition for foam injection of the present invention, and using this to prepare each specimen, , a physical property analysis was performed.

As a result, polyamide-6 resin with a number average molecular weight of 50,000, flat glass fiber, Tris[3-(trimethoxysilyl)propyl] isocyanurate as a coupling agent, Sodium Bicarbonate as a foaming agent, and 1,4,5,8-Tetraaminoanthraquinone as a nucleating agent It was confirmed that only the thermoplastic resin composition of the present invention containing all of these has excellent durability, light weight and heat insulation, and at the same time excellent stability, so that deformation of the appearance of injection is not induced during foam injection molding. On the other hand, the other comparative groups in which the types of components used in the resin composition of the present invention were different showed that the tensile strength, flexural modulus, and impact strength were all lower than the resin composition of the present invention, and deformation after injection was induced. .

Specifically, in the group using round glass long fibers and round glass short fibers instead of flat glass long fibers used in the resin composition of the present invention, tensile strength, flexural modulus, and impact strength were significantly reduced, and the degree of deformation after injection It could be visually confirmed that the curve was bent or severely bent.

In addition, the group using 3-aminopropyltriethoxysilane instead of tris-(3-(trimethoxysilyl)propyl)isocyanurate as a coupling agent also showed a significant decrease in tensile strength, flexural modulus, and impact strength. It was found that the degree of deformation after injection was warped.

In addition, as a nucleating agent, 1,4,5,8-tetraaminoanthraquinone (1,4,5,8-Tetraaminoanthraquinone) instead of dibenzylidene sorbitol (Dibenzylidene Sorbitol) in the comparative group and 1,4,5,8- In all of the comparative groups using tetraaminoanthraquinone in an amount of 0.05 wt%, tensile strength, flexural modulus, and impact strength were significantly reduced, and the degree of deformation after injection was found to be warped.

Through these results, the present inventors have found that (A) 30 to 70% by weight of polyamide-6 polymer, (B) flat type 20 to 60% by weight of a long glass fiber reinforcing agent, (C) 1 to 5% by weight of an isocyanate silane coupling agent, (D) 1 to 5% by weight of a sodium bicarbonate inorganic chemical blowing agent, and (E) 0.1 to 2% by weight of an aminoquinone-based nucleating agent It was confirmed that it is important to use by adding in %.

Therefore, the glass long fiber reinforced thermoplastic resin composition for foam injection according to the present invention is characterized by high productivity foam injection molding using a polyamide material, which is a thermoplastic plastic, and can improve material rigidity by using long glass fibers. , a nucleating agent is applied to improve the mechanical strength of the polyamide resin, thereby improving the overall durability of the composite resin. In addition, in the case of foam injection molding of the resin composition of the present invention, it is possible to replace the aluminum material of the existing battery pack, thereby reducing the weight of parts and reducing the weight. It may have all of the characteristics that can improve the thermal management efficiency of the Therefore, the glass long fiber reinforced thermoplastic resin composition for foam injection of the present invention can be very usefully used in various industrial fields such as automobile parts and materials manufacturing field.

Hereinafter, the present invention will be described in more detail through examples. These examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

<Example 1>

Preparation of long glass fiber reinforced thermoplastic resin composition for foam injection

The present inventors prepared the components of Tables 1 and 2 below, prepared a composition mixed with each component ratio, extruded using a twin-screw extruder, and then injection-molded to prepare a physical property specimen. In addition, as a comparative example, the compositions of Comparative Examples 1 to 6 of Table 2 were prepared and used.

Kinds of components used in the preparation of the thermoplastic resin composition division ingredient Polyamide-6 resin (A) (A) Polyamide-6 resin having a number average molecular weight of 50,000 Fiberglass (B) (B1) Flat glass long fiber: short side length of the fiber cross-section 9 μm, flatness 4,
Glass fiber containing 1.5% by weight of sizing agent with a fiber length of 10 mm (B2) Circular long glass fiber: Glass fiber having a circular cross-sectional diameter of 10 μm and a fiber length of 6 mm and containing 1.5% by weight of a sizing agent (B3) Circular short glass fiber: Glass fiber having a circular cross-sectional diameter of 10 μm and a fiber length of 1 mm and containing 1.5% by weight of a sizing agent Coupling agent (C) (C1) Tris[3-(trimethoxysilyl)propyl] isocyanurate (C2) 3-Aminopropyltriethoxysilan blowing agent (D) (D) Sodium Bicarbonate Nucleating Agent (E) (E1) 1,4,5,8-Tetraaminoanthraquinone (E2) Dibenzylidene Sorbitol

Kind and content (wt%) of the component used in the preparation of the thermoplastic resin composition ingredient Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Polyamide-6 resin (A) 53 53 53 53 53 53.95 51.5 Flat Glass Long Fiber (B1) 40 40 40 40 40 Round Glass Long Fiber (B2) 40 Circular Short Glass Fiber (B3) 40 Coupling agent (C1) 3 3 3 3 3 3 Coupling agent (C2) 3 blowing agent (D) 3 3 3 3 3 3 3 Nucleating agent (E1) One One One One 0.05 2.5 Nucleating agent (E2) One

<Example 2>

Physical property analysis

The physical properties of each of the specimens prepared in Example 1 were measured in the following manner, and the results are shown in Table 3 below.

<Method of measuring physical properties>

(1) Specific gravity: measured according to ASTM D792.

(2) Tensile strength: measured according to ASTM D638.

(3) Flexural modulus: Measured according to ASTM 790 regulations.

(4) Impact strength: Measured according to ASTM D256.

(5) Thermal conductivity measurement: Measured according to the laser flash method ASTM E1461.

(6) Deformation measurement after injection: After injection of 160 x 220 x 3 mm ³ specimens, the degree of deformation was visually observed, and according to the degree of deformation, O: good, △: warpage, X: severely warped.

Physical property analysis result ingredient Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Polyamide-6 resin (A) 53 53 53 53 53 53.95 51.5 Flat Glass Long Fiber (B1) 40 40 40 40 40 Round Glass Long Fiber (B2) 40 Circular Short Glass Fiber (B3) 40 Coupling agent (C1) 3 3 3 3 3 3 Coupling agent (C2) 3 blowing agent (D) 3 3 3 3 3 3 3 Nucleating agent (E1) One One One One 0.05 2.5 Nucleating agent (E2) One importance 1.32 1.32 1.32 1.32 1.32 1.32 1.32 Tensile strength (MPa) 178 165 162 150 157 161 170 Flexural modulus (MPa) 11,800 10,500 9,800 10,400 10,800 11,000 11,200 Impact strength (J/m) 250 190 85 150 230 230 180 Deformation after injection ○ △ X △ △ △ ○

As a result of the analysis, as shown in Table 3 above, polyamide-6 resin with a number average molecular weight of 50,000, flat glass fiber, Tris[3-(trimethoxysilyl)propyl] isocyanurate as a coupling agent, Sodium Bicarbonate as a blowing agent, and 1 as a nucleating agent The molded article prepared with the composition of Example 1 containing ,4,5,8-Tetraaminoanthraquinone showed the best tensile strength, flexural modulus and impact strength compared to the molded article prepared with the composition of other Comparative Examples 1 to 6, It was confirmed that the appearance was also good even after injection.

Therefore, through these results, the present inventors found that polyamide-6 resin with a number average molecular weight of 50,000, flat glass filament, Tris[3-(trimethoxysilyl)propyl] isocyanurate as a coupling agent, Sodium Bicarbonate as a blowing agent, 1,4 as a nucleating agent, The thermoplastic resin composition of the present invention containing all of 5,8-Tetraaminoanthraquinone has excellent durability, lightness and heat insulation as well as excellent stability. It was found that it can be usefully used as a reinforced thermoplastic resin composition, and it was found that excellent products applicable to various fields such as electric vehicles can be produced by using the glass long fiber reinforced thermoplastic resin composition for foam injection of the present invention. .

So far, with respect to the present invention, the preferred embodiments have been looked at. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (10)

(A) 30 to 70% by weight of a polyamide-6 polymer,
(B) 20 to 60% by weight of a flat glass long fiber reinforcing agent,
(C) 1 to 5% by weight of an isocyanate silane-based coupling agent,
(D) 1 to 5% by weight of sodium bicarbonate inorganic chemical blowing agent and
(E) containing 0.1 to 2% by weight of an amino quinone-based nucleating agent,
A foamed injection-type glass fiber reinforced thermoplastic resin composition. According to claim 1,
The polyamide-6 polymer has a number average molecular weight of 20,000 to 70,000, an expanded injection-type glass fiber reinforced thermoplastic resin composition. According to claim 1,
Wherein the flat glass long fiber reinforcing agent has a short side length of 3 to 15 μm in a cross section of a glass fiber, a flatness of 2 to 5, and a fiber length of 5 to 15 mm. 4. The method of claim 3,
Wherein the flat glass long fiber reinforcing agent comprises a sizing agent in an amount of 0.1 to 3 wt % based on the weight of the flat glass long fiber reinforcing agent. 5. The method of claim 4,
Wherein the sizing agent is at least one selected from the group consisting of urethane resins, acrylic resins, styrene resins and epoxy resins. According to claim 1,
The isocyanate silane coupling agent is tris-(3-(trimethoxysilyl)propyl)isocyanurate (Tris-(3(trimethoxysilyl)propyl)isocyanurate) resin composition. According to claim 1,
Wherein the sodium bicarbonate inorganic chemical foaming agent is sodium bicarbonate (Sodium Bicarbonate), foam injection-type glass fiber reinforced thermoplastic resin composition. According to claim 1,
The amino quinone-based nucleating agent is 1,4,5,8-tetraaminoanthraquinone (1,4,5,8-Tetraaminoanthraquinone), characterized in that the foam injection-type glass fiber reinforced thermoplastic resin composition. A molded article manufactured including the foamed injection-type glass long fiber reinforced thermoplastic resin composition of any one of claims 1 to 8. 10. The method of claim 9,
The molded article is a molded article manufactured including a foamed injection-type glass long fiber reinforced thermoplastic resin composition, characterized in that it is an interior material for automobiles.