Continuous fiber reinforced composite insert injection-molded product and method for preparing same

Abstract

A continuous fiber-reinforced composite insert injection-molded product of the present invention comprises: a continuous fiber-reinforced composite material; and an over-molding injection material surrounding the continuous fiber reinforced composite material, wherein the continuous fiber reinforced composite material is formed in a rod shape by combining a plurality of intermediate materials including a polyolefin resin having a melting point of about 150 to about 200℃, continuous fibers, and a polyolefin resin graft-polymerized with maleic anhydride, and the over-molding injection material is formed from a thermoplastic resin composition containing a thermoplastic resin with a melting point of about 210 to about 300℃ and an acicular inorganic filler. The continuous fiber reinforced composite insert injection-molded product exhibits excellent strength, rigidity, and lightweight properties, and balances therebetween.

Description

Continuous fiber reinforced composite insert injection molded product and manufacturing method thereof

[0001] The present invention relates to a continuous fiber-reinforced composite insert injection molded product and a method for manufacturing the same. More specifically, the present invention relates to a continuous fiber-reinforced composite insert injection molded product exhibiting excellent strength, rigidity, lightness, and a balance of these properties, and a method for manufacturing the same.

[0002]

[0003] Metal materials have excellent strength and rigidity, but their heavy weight limits their use in electrical and electronic products and automobiles where weight reduction is important, as they can reduce the efficiency of the product and cause thermal runaway due to short circuits due to their lack of electrical insulation.

[0004] Conventional plastic materials have excellent lightness and insulation properties, and the injection molding process using plastic materials is easy to mass-produce, so it is used to produce various products. However, it does not have the strength and rigidity to replace metal.

[0005] Therefore, there is a need to develop continuous fiber reinforced composite insert injection molded products that can achieve lightweight designs that can replace metals by applying plastic materials and exhibiting excellent strength and rigidity.

[0006] The background technology of the present invention is disclosed in Korean Patent No. 10-2334459, etc.

[0007]

[0008] The purpose of the present invention is to provide a continuous fiber reinforced composite material insert injection molded product having excellent strength, rigidity, light weight, and balance of these properties.

[0009] Another object of the present invention is to provide a method for manufacturing the continuous fiber reinforced composite material insert injection molded product.

[0010] The above and other objects of the present invention can all be achieved by the present invention described below.

[0011]

[0012] 1. One aspect of the present invention relates to a continuous fiber-reinforced composite insert injection molded product. The continuous fiber-reinforced composite insert injection molded product comprises: a continuous fiber-reinforced composite material; and an over-molding injection molded material surrounding the continuous fiber-reinforced composite material; wherein the continuous fiber-reinforced composite material is formed in a rod shape by plying a plurality of intermediate materials including a polyolefin resin having a melting point of about 150 to about 200°C, a polyolefin resin in which continuous fibers and maleic anhydride are graft-polymerized, and the over-molding injection molded material is formed from a thermoplastic resin composition including a thermoplastic resin having a melting point of about 210 to about 300°C and an acicular inorganic filler.

[0013] 2. In the above 1 specific example, the intermediate material may include about 100 parts by weight of a base material including about 30 to about 60 parts by weight of a polyolefin resin having a melting point of about 150 to about 200°C and about 40 to about 70 parts by weight of the continuous fiber, and about 0.1 to about 5 parts by weight of a polyolefin resin graft-polymerized with maleic anhydride, based on about 100 parts by weight of the base material.

[0014] 3. In the above 1 or 2 specific examples, the intermediate material may be in the form of yarn or tape.

[0015] 4. In the above 1 to 3 specific examples, the polyolefin resin having a melting point of about 150 to about 200°C may include at least one of a polypropylene resin and a polyethylene resin.

[0016] 5. In the above 1 to 4 specific examples, the continuous fiber may include at least one of glass fiber and carbon fiber.

[0017] 6. In the above 1 to 5 specific examples, the polyolefin resin graft-polymerized with maleic anhydride may include at least one of polypropylene graft-polymerized with maleic anhydride (PP-g-MAH) and polyethylene graft-polymerized with maleic anhydride (PE-g-MAH).

[0018] 7. In the above 1 to 6 specific examples, the thermoplastic resin composition may include about 100 parts by weight of the thermoplastic resin having a melting point of about 210 to about 300°C, and about 20 to about 60 parts by weight of the needle-shaped inorganic filler.

[0019] 8. In the above 1 to 7 specific examples, the thermoplastic resin having a melting point of about 210 to about 300°C may include at least one of a polyamide resin, a polyethylene terephthalate resin, and a polybutylene terephthalate resin.

[0020] 9. In the above 1 to 8 specific examples, the needle-shaped inorganic filler may include at least one of glass fiber and carbon fiber.

[0021] 10. In the above specific examples 1 to 9, the overmolding injection material may have a thickness of about 2 mm or more covering the continuous fiber reinforced composite material.

[0022] 11. In the above 1 to 10 specific examples, the continuous fiber reinforced composite material may have a tensile strength of about 700 MPa or more of a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

[0023] 12. In the above specific examples 1 to 11, the continuous fiber reinforced composite material may have a tensile modulus of about 25 GPa or more of a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

[0024] 13. Another aspect of the present invention relates to a method for manufacturing a continuous fiber-reinforced composite insert injection molded product. The method comprises the steps of: inserting a continuous fiber-reinforced composite material in a rod shape into an injection mold; and over-molding a thermoplastic resin composition while the continuous fiber-reinforced composite material is inserted into the injection mold, thereby forming an over-molding injection molded product surrounding the continuous fiber-reinforced composite material. The continuous fiber-reinforced composite material is formed in a rod shape by plying a plurality of intermediate materials including a polyolefin resin having a melting point of about 150 to about 200°C, a polyolefin resin in which continuous fibers and maleic anhydride are graft-polymerized, and the thermoplastic resin composition includes a thermoplastic resin having a melting point of about 210 to about 300°C and an acicular inorganic filler.

[0025] 14. In the above 13 specific examples, the over-mold injection can be performed at a temperature of about 230 to about 330°C.

[0026]

[0027] The present invention has the effect of providing a continuous fiber reinforced composite material insert injection molded product having excellent strength, rigidity, lightness, and balance of physical properties thereof, and a method for manufacturing the same.

[0028]

[0029] FIG. 1 is a schematic diagram of a continuous fiber reinforced composite insert injection molded product according to one specific example of the present invention.

[0030] Figure 2 is a cross-sectional view of a continuous fiber reinforced composite insert injection molded product according to one specific example of the present invention.

[0031]

[0032] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the following embodiments are provided to enable those skilled in the art to fully understand the present invention, and may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

[0033] In order to clearly express the components in the drawings, the sizes of the components, such as their widths and thicknesses, are somewhat enlarged. In addition, although only a portion of the components is illustrated for convenience of explanation, those skilled in the art will be able to easily understand the remaining portions of the components. Furthermore, those skilled in the art will be able to implement the concept of the present invention in various other forms without departing from the technical spirit of the present invention. Overall, the drawings have been described from the observer's perspective, and the terms "upper," "lower," "left," "right," "front," and "back" are based on the drawings. Furthermore, those skilled in the art will be able to implement the concept of the present invention in various other forms without departing from the technical spirit of the present invention. In addition, the same reference numerals in multiple drawings indicate substantially the same elements.

[0034] In addition, singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprises", "have", etc. should be understood to specify the presence of a described feature, number, step, operation, component, part, or combination thereof, but not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0035] In this specification, “a to b” indicating a numerical range is defined as “≥a and ≤b”.

[0036]

[0037] FIG. 1 is a schematic diagram of a continuous fiber-reinforced composite insert injection molded product according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view of a continuous fiber-reinforced composite insert injection molded product according to one embodiment of the present invention. As illustrated in FIGS. 1 and 2, a continuous fiber-reinforced composite insert injection molded product (100) according to one embodiment of the present invention includes a continuous fiber-reinforced composite material (110); and an over-molding injection molded material (120) surrounding the continuous fiber-reinforced composite material (110).

[0038]

[0039] A continuous fiber-reinforced composite material (110) according to one specific example of the present invention may be formed in a rod shape by plying a plurality of intermediate materials including a polyolefin resin having a melting point of about 150 to about 200°C, continuous fibers, and a polyolefin resin graft-polymerized with maleic anhydride. For example, the continuous fiber-reinforced composite material (110) may be manufactured by a manufacturing method including: (a) continuously introducing a plurality of intermediate materials into a heating unit; (b) heating the intermediate materials to a temperature higher than the melting point of the polyolefin resin contained in the intermediate materials having a melting point of about 150 to about 200°C, thereby melting at least a portion of the polyolefin resin on the surface of the intermediate materials; and (c) passing two or more of the molten intermediate materials through a nozzle to ply them and form them into a rod shape.

[0040] In a specific example, the intermediate material may include about 100 parts by weight of a base material including about 30 to about 60 wt%, for example, about 35 to about 55 wt%, of a polyolefin resin having a melting point of about 150 to about 200°C, and about 40 to about 70 wt%, for example, about 45 to about 65 wt%, of the continuous fiber; and about 0.1 to about 5 parts by weight, for example, about 0.2 to about 3.5 parts by weight, of a polyolefin resin graft-polymerized with maleic anhydride, with respect to about 100 parts by weight of the base material. Within this range, the strength, rigidity, lightness, and balance of physical properties thereof of the continuous fiber-reinforced composite material and the continuous fiber-reinforced composite insert injection-molded product may be excellent.

[0041] In a specific example, the intermediate material may be a continuous fiber impregnated with the polyolefin resin, and may be in the form of a yarn or tape.

[0042] In a specific example, the yarn generally refers to a thermoplastic composite material in the form of a noodle reinforced with continuous fibers in the field of composite technology, and a composite material generally sold by being drawn and molded can be used. For example, the yarn may be an intermediate material manufactured during the production process of long fiber reinforced thermoplastics (LFT), which are commonly sold in the thermoplastic composite material market, and may have a diameter of 1 to 3 mm.

[0043] In a specific example, the tape may be a slitted sheet-shaped composite material. The tape may have a thickness of about 0.1 to about 1 mm and a width of about 3 to about 30 mm, for example, a thickness of about 0.2 to about 0.8 mm and a width of about 5 to about 25 mm, for example, a thickness of about 0.3 to about 0.7 mm and a width of about 5 to about 20 mm, for example, a thickness of about 0.4 to about 0.6 mm and a width of about 5 to about 15 mm may be used.

[0044] In a specific example, about 2 to about 10 of the intermediate materials can be simultaneously introduced into the heating unit, for example, about 3 to about 8, for example, about 3 to about 6 can be simultaneously introduced. After being introduced into the heating unit, at least a portion of the polyolefin resin on the surface of the intermediate materials is melted, thereby preliminarily bonding the plurality of intermediate materials. At this time, the temperature of the heating unit may be higher than the melting point of the polyolefin resin constituting the intermediate material, for example, about 20 to about 40°C higher than the melting point of the polyolefin resin. In the above range, bonding of the intermediate materials can be facilitated. The heat source of the heating unit is not particularly limited, but may include, for example, a halogen lamp, a hot air blower, a laser heater, etc.

[0045] In a specific example, the intermediate material that is melted and pre-blended in the heating section is finally blended and formed into a rod shape by passing through a nozzle. More specifically, the intermediate material, in which at least the polyolefin resin on the surface is melted by passing through the heating section, is injected into the nozzle, and the cross-sectional area inside the nozzle is reduced compared to the cross-sectional area of ​​the heating section, and is blended under pressure and formed into a rod shape. The material of the nozzle is not particularly limited, but, for example, a phosphor bronze material containing about 0.05 to about 0.5 wt% of phosphorus (P) and having excellent heat resistance, corrosion resistance, and wear resistance (hardness of 100 HB or higher) can be used. In addition, the surface inside the nozzle is polished to have an average surface roughness (R a ) can be used, which is precisely finished to a level of about 1 ㎛ or less, and in this case, when the intermediate material passing through the nozzle is compressed inside the nozzle, damage to the material caused by friction during the sliding process between the intermediate material and the nozzle surface can be minimized. In addition, the nozzle can be attached / detachable to the heating section, and can be manufactured with various inner diameters and cross-sectional shapes, so that various outlet apertures can be applied to change the cross-sectional size of the continuous fiber reinforced composite material in the form of a rod that is formed according to the input amount of the intermediate material. The inner cross-section of the nozzle may have a shape that gradually narrows from the inlet end toward the outlet end, and when considering the intermediate material braiding efficiency, the ratio of the inlet end diameter (L2) to the outlet end diameter (L1) can be about 1.5 to about 5, and the ratio of the length (L3) to the outlet end diameter (L1) can be about 2 to about 10.

[0046] In a specific example, the polyolefin resin may have a melting point of about 150 to about 200°C, for example, about 155 to about 190°C. Within this range, the strength, rigidity, etc. of the continuous fiber-reinforced composite material and the continuous fiber-reinforced composite insert injection molded product may be excellent.

[0047] In a specific example, the polyolefin resin having a melting point of about 150 to about 200°C may include at least one of a polypropylene resin and a polyethylene resin.

[0048] In a specific example, the continuous fiber may include at least one of glass fiber and carbon fiber.

[0049] In a specific example, the continuous fiber may be in the form of a fiber and may have a circular cross-section. In addition, the continuous fiber with the circular cross-section may have a diameter of about 5 to about 20 μm, for example, about 7 to about 15 μm, as measured by a scanning electron microscope (manufacturer: JEOL, device name: JSM-6390A), and there is no limitation on the length, so that it continues continuously without interruption within the product. Therefore, the strength and stiffness of the continuous fiber-reinforced composite material are superior to those of long fiber and short fiber-reinforced composite materials.

[0050] In a specific example, the continuous fiber may be treated with a conventional surface treatment agent. The surface treatment agent may include, but is not limited to, a silane compound, a urethane compound, an epoxy compound, or the like.

[0051] In a specific example, the polyolefin resin graft-polymerized with maleic anhydride may include at least one of polypropylene graft-polymerized with maleic anhydride (PP-g-MAH) and polyethylene graft-polymerized with maleic anhydride (PE-g-MAH).

[0052] In a specific example, the polyolefin resin graft-polymerized with maleic anhydride may have a content of maleic anhydride of about 0.1 to about 3 wt%, for example, about 0.5 to about 2 wt%, based on 100 wt% of the total. Within this range, the interfacial adhesion between the continuous fiber-reinforced composite material and the overmolding injection material may be excellent.

[0053] In a specific example, the continuous fiber reinforced composite material may have a tensile strength of about 700 MPa or more, for example, about 750 to about 950 MPa, of a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

[0054] In a specific example, the continuous fiber reinforced composite material may have a tensile modulus of about 20 GPa or more, for example, about 25 to about 35 GPa, of a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

[0055]

[0056] An overmolding injection material (120) according to one specific example of the present invention may be formed from a thermoplastic resin composition including a thermoplastic resin having a melting point of about 210 to about 300°C and a needle-shaped inorganic filler.

[0057] In a specific example, the thermoplastic resin composition may include about 100 parts by weight of the thermoplastic resin having a melting point of about 210 to about 300°C, and about 20 to about 60 parts by weight, for example, about 25 to about 55 parts by weight, of the needle-shaped inorganic filler. Within the above range, the strength, rigidity, lightness, and balance of these physical properties of the continuous fiber-reinforced composite insert injection-molded product may be excellent.

[0058] In a specific example, the thermoplastic resin may have a melting point of about 210 to about 300°C, for example, about 220 to about 280°C. If it exceeds the above range, the interfacial adhesion between the continuous fiber-reinforced composite material and the overmolding injection material may be reduced, and there is a concern that the strength, rigidity, etc. of the continuous fiber-reinforced composite insert injection product may be reduced.

[0059] In a specific example, the thermoplastic resin having a melting point of about 210 to about 300°C may include at least one of a polyamide (PA) resin, a polyethylene terephthalate (PET) resin, and a polybutylene terephthalate (PBT) resin.

[0060] In a specific example, the bed-type inorganic filler may include at least one of glass fiber and carbon fiber.

[0061] In a specific example, the needle-shaped inorganic filler may be in the form of fibers and may have a cross-section of various shapes such as circular or oval. In addition, the needle-shaped inorganic filler may have a diameter or a cross-sectional major axis of about 5 to about 20 ㎛, for example, about 7 to about 15 ㎛, as measured by a scanning electron microscope (manufacturer: JEOL, device name: JSM-6390A), and a length before processing may be about 1 to about 30 mm, for example, about 2 to about 16 mm. Within the above range, the strength, rigidity, etc. of the continuous fiber-reinforced composite insert injection-molded product may be excellent.

[0062] In a specific example, the needle-shaped inorganic filler may be treated with a conventional surface treatment agent. The surface treatment agent may include, but is not limited to, a silane-based compound, a urethane-based compound, an epoxy-based compound, and the like.

[0063] In a specific example, the thermoplastic resin composition may further include additives included in conventional thermoplastic resin compositions. Examples of the additives include, but are not limited to, ultraviolet stabilizers, heat stabilizers, antioxidants, flame retardants, anti-drip agents, release agents, nucleating agents, pigments, dyes, and mixtures thereof. When the additives are used, the content thereof may be from about 0.001 to about 40 parts by weight, for example, from about 0.01 to about 10 parts by weight, based on about 100 parts by weight of the thermoplastic resin, but is not limited thereto.

[0064] In a specific example, the thermoplastic resin composition may be in the form of pellets obtained by mixing the above components and melt-extruding them at about 150 to about 240°C, for example, about 160 to about 220°C, using a conventional twin-screw extruder.

[0065] In a specific example, the overmolding injection molding material (120) may be formed to have a thickness of about 2 mm or more covering the continuous fiber reinforced composite material (110) so that the insert material (continuous fiber reinforced composite material (110)) is not exposed on the surface of the product (continuous fiber reinforced composite material insert injection molding product (100)).

[0066]

[0067] A continuous fiber reinforced composite insert injection molded product (100) according to one specific example of the present invention can be manufactured by a manufacturing method including the steps of inserting the continuous fiber reinforced composite material (110) in the shape of a rod into an injection mold; and then over-molding the thermoplastic resin composition while the continuous fiber reinforced composite material (110) is inserted into the injection mold, thereby forming an over-molding injection molded material (120) surrounding the continuous fiber reinforced composite material (110). Such injection molding methods are well known to those skilled in the art to which the present invention pertains.

[0068] In a specific example, the over-mold injection may be performed at a temperature of about 230 to about 330°C, for example, about 250 to about 280°C. Within this range, the interfacial adhesion between the continuous fiber-reinforced composite material and the over-molding injection material is excellent, so that the strength, rigidity, etc. of the continuous fiber-reinforced composite insert injection product may be excellent.

[0069]

[0070] A continuous fiber reinforced composite insert injection molded product (100) according to one specific example of the present invention can be used in various sizes and for various purposes, and has excellent strength, rigidity, lightness, and a balance of their physical properties, so that it can be used as a substitute for metal material parts with poor lightness, and is useful as, for example, an automobile bumper, an automobile door beam, an automobile cowl crossbar, an end plate for an electric vehicle secondary battery module, etc.

[0071]

[0072] Hereinafter, the present invention will be described in more detail through examples; however, these examples are for the purpose of explanation only and should not be construed as limiting the present invention.

[0073]

[0074] Example

[0075] Below, the specifications of each component used in the examples are as follows.

[0076] (A) Continuous fiber reinforced composite material

[0077] A continuous fiber-reinforced composite material in the form of a rod (Manufacturer: Lotte Chemical, Product name: TOW_PPGF, containing polypropylene resin (melting point: approximately 160°C), continuous fiber (glass fiber), and polypropylene graft-polymerized with maleic anhydride (PP-g-MAH)) was used.

[0078] The above continuous fiber reinforced composite material in the form of a rod had a tensile strength of approximately 770 MPa and a tensile modulus of approximately 28 GPa for a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

[0079] (B) Thermoplastic resin composition for overmolding injection material

[0080] A pellet-shaped glass fiber reinforced nylon 6 resin composition (manufacturer: Lotte Chemical, product name: HA-9305G, nylon 6 resin melting point: about 220°C, glass fiber content: about 30 wt%) was used.

[0081]

[0082] Example 1

[0083] After inserting the above-mentioned continuous fiber reinforced composite material (A) in the form of a rod into an injection mold, the injection mold was closed, and the above-mentioned thermoplastic resin composition (B) was over-molded using an injection molding machine (molding temperature: 260°C, mold temperature: 80°C) to manufacture a continuous fiber reinforced composite material insert injection molded product.

[0084]

[0085] The continuous fiber-reinforced composite insert injection-molded product of the present invention has a high-rigidity (tensile strength of about 700 MPa or more, tensile modulus of about 25 GPa or more) continuous fiber-reinforced composite material inserted into the injection-molded product, so that it can realize high rigidity compared to a simple injection-molded product of a thermoplastic resin composition, and it has excellent lightness compared to a metal material, so that it can replace metal parts. In addition, since the continuous fiber-reinforced composite material inserted into the injection-molded product is not manufactured separately and then assembled, but is inserted into the mold during the injection molding process and injected, there is no need for a separate post-assembly process, so that economical production is possible.

[0086] In particular, the melting point of the thermoplastic resin included in the overmolding injection material is sufficiently higher than the melting point of the polypropylene resin included in the continuous fiber-reinforced composite material, so that despite the use of different resins, the interfacial adhesion between the continuous fiber-reinforced composite material and the overmolding injection material is excellent, and it was confirmed that the continuous fiber-reinforced composite insert injection product of the present invention implements high rigidity.

[0087]

[0088] The present invention has been described with reference to exemplary embodiments. Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered illustrative rather than limiting. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. Continuous fiber reinforced composite materials; and An overmolding injection material surrounding the above continuous fiber reinforced composite material; The above continuous fiber reinforced composite material is formed into a rod shape by combining a plurality of intermediate materials including a polyolefin resin having a melting point of about 150 to about 200°C, continuous fibers, and a polyolefin resin graft polymerized with maleic anhydride. A continuous fiber reinforced composite insert injection molded product characterized in that the above overmolding injection material is formed from a thermoplastic resin composition containing a thermoplastic resin having a melting point of about 210 to about 300°C and a needle-shaped inorganic filler.

2. A continuous fiber reinforced composite insert injection molded product characterized in that, in the first paragraph, the intermediate material comprises about 100 parts by weight of a base material including about 30 to about 60 parts by weight of a polyolefin resin having a melting point of about 150 to about 200°C and about 40 to about 70 parts by weight of the continuous fiber, and about 0.1 to about 5 parts by weight of a polyolefin resin graft polymerized with maleic anhydride, based on about 100 parts by weight of the base material.

3. A continuous fiber reinforced composite insert injection molded product according to claim 1 or 2, characterized in that the intermediate material is in the form of yarn or tape.

4. A continuous fiber reinforced composite insert injection molded product, characterized in that the polyolefin resin having a melting point of about 150 to about 200°C according to any one of claims 1 to 3 comprises at least one of polypropylene resin and polyethylene resin.

5. A continuous fiber reinforced composite insert injection molded product according to any one of claims 1 to 4, characterized in that the continuous fiber comprises at least one of glass fiber and carbon fiber.

6. A continuous fiber-reinforced composite insert injection molded product according to any one of claims 1 to 5, wherein the polyolefin resin graft-polymerized with maleic anhydride comprises at least one of polypropylene graft-polymerized with maleic anhydride and polyethylene graft-polymerized with maleic anhydride.

7. A continuous fiber-reinforced composite insert injection molded product according to any one of claims 1 to 6, wherein the thermoplastic resin composition comprises about 100 parts by weight of a thermoplastic resin having a melting point of about 210 to about 300°C, and about 20 to about 60 parts by weight of the needle-shaped inorganic filler.

8. A continuous fiber-reinforced composite insert injection molded product, characterized in that the thermoplastic resin having a melting point of about 210 to about 300°C according to any one of claims 1 to 7 comprises at least one of polyamide resin, polyethylene terephthalate resin, and polybutylene terephthalate resin.

9. A continuous fiber reinforced composite insert injection molded product according to any one of claims 1 to 8, characterized in that the needle-shaped inorganic filler comprises at least one of glass fiber and carbon fiber.

10. A continuous fiber reinforced composite insert injection molded product according to any one of claims 1 to 9, characterized in that the overmolding injection molded material has a thickness of about 2 mm or more covering the continuous fiber reinforced composite material.

11. A continuous fiber reinforced composite insert injection molded product according to any one of claims 1 to 10, characterized in that the continuous fiber reinforced composite material has a tensile strength of about 700 MPa or more of a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

12. A continuous fiber-reinforced composite insert injection molded product according to any one of claims 1 to 11, characterized in that the continuous fiber-reinforced composite material has a tensile modulus of about 25 GPa or more of a 1 mm thick specimen measured under conditions of 23°C and 5 mm / min according to ISO 527-5.

13. Inserting a continuous fiber reinforced composite material in the shape of a rod into an injection mold; and It includes a step of forming an over-molding injection material surrounding the continuous fiber-reinforced composite material by over-molding a thermoplastic resin composition while inserting the continuous fiber-reinforced composite material into an injection mold. The above continuous fiber reinforced composite material is formed into a rod shape by combining a plurality of intermediate materials including a polyolefin resin having a melting point of about 150 to about 200°C, continuous fibers, and a polyolefin resin graft polymerized with maleic anhydride. A method for manufacturing a continuous fiber-reinforced composite insert injection molded product, characterized in that the thermoplastic resin composition comprises a thermoplastic resin having a melting point of about 210 to about 300°C and a needle-shaped inorganic filler.

14. A method for manufacturing a continuous fiber reinforced composite insert injection product, characterized in that in claim 13, the over-mold injection is performed under conditions of about 230 to about 330°C.

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