WO2023234581A1 - Thermoplastic resin composition and molded product manufactured therefrom - Google Patents

Abstract

A thermoplastic resin composition of the present invention comprises, with respect to about 100 parts by weight of a base material comprising (A) about 40-70% by weight of a polyamide resin, (B) about 5-10% by weight of a phosphorus-based flame retardant, (C) about 2-5% by weight of a melamine-based flame retardant, and (D) about 20-50% by weight of glass fiber: (E) about 0.5-3 parts by weight of zinc borate; and (F) about 1-3 parts by weight of an ionomer. The thermoplastic resin composition and a molded product manufactured therefrom are excellent in flame retardancy, impact resistance, fluidity and laser transmittance.

Description

Thermoplastic resin compositions and molded articles made therefrom

The present invention relates to thermoplastic resin compositions and molded articles manufactured therefrom.

Thermoplastic resin compositions used in automobile parts or electrical appliances have industrial standards for flame retardancy and require excellent electrical insulation and flame retardancy. In response to recent environmental issues, governments in each country are supporting the distribution of electric vehicles, and as a result, demand for electric vehicle batteries is increasing. Although it is important in general electrical appliances, as safety becomes an issue in electric vehicle battery applications, flame retardancy in thin films of thermoplastic resin compositions is gaining importance.

In addition, almost all component parts using thermoplastic resin compositions are joined to each other. Most of the joint areas are joined with bolts through insert injection, but laser treatment is used to improve the weight, thinness, aesthetics, energy efficiency, and appearance of the parts. Joining component parts using welding technology is a growing trend.

Polyamide resin provides excellent heat resistance and moldability, so it is useful in automobile parts or electrical appliances. However, polyamide resins lack flame resistance, so flame retardants must be added to provide the flame retardancy required for specific applications. Bromine-based compounds and antimony-based compounds may be used as the flame retardant, but especially when bromine-based compounds are used as flame retardants, bromine-based compounds and antimony-based compounds are included because they may cause environmental problems when a resin composition containing them is burned. If so, its use may be limited.

Accordingly, phosphorus-based flame retardants are being used to improve the flame retardancy of polyamide resin compositions. However, when phosphorus-based flame retardants are used, the laser transmittance of polyamide resin compositions containing them and molded products manufactured therefrom decreases, resulting in component parts using laser welding technology. It is difficult to join them.

Therefore, there is a need to develop a thermoplastic resin composition that is flame retardant and also has excellent laser transmittance.

The purpose of the present invention is to provide a thermoplastic resin composition with excellent flame retardancy, impact resistance, fluidity, and laser transmittance.

Another object of the present invention is to provide a molded article manufactured from the thermoplastic resin composition.

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

1. One aspect of the present invention relates to a thermoplastic resin composition. The thermoplastic resin composition includes (A) about 40 to about 70% by weight of polyamide resin; (B) about 5 to about 10 weight percent of a phosphorus-based flame retardant; (C) about 2 to about 5% by weight of a melamine-based flame retardant; and (D) about 20 to about 50% by weight of glass fiber; (E) about 0.5 to about 3 parts by weight of zinc borate; and (F) about 1 to about 3 parts by weight of an ionomer.

2. In the first embodiment, the polyamide resin is polyamide 6, polyamide 66, polyamide 46, polyamide 11, polyamide 12, polyamide 610, polyamide 612, polyamide 6I, polyamide 6T, poly It may include amide 4T, polyamide 410, polyamide 510, polyamide 1010, polyamide 1012, polyamide 10T, polyamide 1212, polyamide 12T, polyamide MXD6, or a combination thereof.

3. In the first or second embodiment, the polyamide resin may be polyamide 66.

4. In embodiments 1 to 3, the phosphorus-based flame retardant is aluminum diethyl phosphinate, triphenyl phosphate, ammonium polyphosphate, resorcinol-di(bis- 2,6-dimethylphenyl) phosphate (resorcinol-di(bis-2,6-dimethylphenyl) phosphate), bisphenol A diphenyl phosphate, cyclophosphazene, diethyl phosphinate ammonium salt ( diethyl phosphinate ammonium salt), or any combination thereof.

5. In embodiments 1 to 4, the phosphorus-based flame retardant may be aluminum diethyl phosphinate.

6. In embodiments 1 to 5, the melamine-based flame retardant may be any one of melamine polyphosphate, melamine phosphate, melamine pyrophosphate, or a combination thereof.

7. In embodiments 1 to 6, the melamine-based flame retardant may be melamine polyphosphate.

8. In embodiments 1 to 7, the ionomer may be one in which the carboxylic acid of methacrylic acid is neutralized with a metal ion in the molecule of an ethylene-methacrylic acid copolymer in which ethylene and methacrylic acid are copolymerized.

9. In embodiments 1 to 8, the weight average molecular weight of the ionomer may be about 10,000 to about 100,000 g/mol.

10. In embodiments 1 to 9, the thermoplastic resin composition is selected from antibacterial agents, flame retardants, nucleating agents, coupling agents, fillers, plasticizers, impact modifiers, lubricants, mold release agents, heat stabilizers, antioxidants, ultraviolet stabilizers, pigments, and dyes. At least one additional additive may be included.

11. Another aspect of the present invention relates to molded articles. The molded article is manufactured from the thermoplastic resin composition according to any one of items 1 to 10 above.

12. In the 11th embodiment above, the molded product may have a flame resistance of V-0 or higher as measured on a 1.5 mm thick specimen according to the UL94 standard.

13. In embodiments 11 or 12 above, the molded article may have a laser transmittance of about 20 to about 50% at a wavelength of 980 nm for a 1.5 mm thick specimen.

14. In embodiments 11 to 13 above, the molded article may have an Izod impact strength of about 8 kgf·cm/cm or more as measured on a 1/8 inch thick specimen according to the ASTM D256 standard.

15. In embodiments 11 to 14, the molded article may have a flow index of about 85 g/10min or more as measured at 275°C and a load of 2.16 kg according to the ASTM D1238 standard.

The present invention has the effect of providing a thermoplastic resin composition with excellent flame retardancy, impact resistance, fluidity, and laser transmittance, and a molded article manufactured therefrom.

Hereinafter, the present invention will be described in detail as follows.

The thermoplastic resin composition according to the present invention includes (A) polyamide resin; (B) phosphorus-based flame retardant; (C) melamine-based flame retardant; (D) glass fiber; (E) zinc borate; and (F) ionomer.

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

In this specification, unless otherwise specified, “copolymerization” means block copolymerization, random copolymerization, and graft copolymerization, and “copolymer” means block copolymer, random copolymer, and graft copolymerization.

(A) Polyamide resin

The polyamide resin according to one embodiment of the present invention enables the thermoplastic resin composition to realize excellent mechanical properties. The polyamide resin may be a variety of polyamide resins known in the art, for example, aromatic polyamide resin, aliphatic polyamide resin, or mixtures thereof, and is not particularly limited.

In a specific example, the aromatic polyamide resin is a polyamide resin containing an aromatic group in the main chain, and may be a wholly aromatic polyamide resin, a semi-aromatic polyamide resin, or a mixture thereof.

In an embodiment, the wholly aromatic polyamide resin refers to a polymer of an aromatic diamine and an aromatic dicarboxylic acid, and the semi-aromatic polyamide resin includes at least one aromatic unit and at least one non-aromatic unit between amide bonds. means to include. For example, the semi-aromatic polyamide resin may be a polymer of aromatic diamine and aliphatic dicarboxylic acid, or may be a polymer of aliphatic diamine and aromatic dicarboxylic acid.

Here, the aliphatic polyamide resin refers to a polymer of aliphatic diamine and aliphatic dicarboxylic acid.

In specific embodiments, examples of the aromatic diamine include p-xylene diamine, m-xylene diamine, etc., but are not limited thereto. Additionally, these may be used alone or in combination of two or more types.

In a specific example, examples of the aromatic dicarboxylic acid include phthalic acid, isophthalic acid, terephthalic acid, 2,6-naphthalenedicarboxylic acid, (1,3-phenylenedioxy)diacetic acid, etc. It is not limited. Additionally, these may be used alone or in combination of two or more types.

In specific embodiments, examples of the aliphatic diamine include ethylenediamine, trimethylenediamine, hexamethylenediamine, dodecamethylenediamine, piperazine, etc., but are not limited thereto. Additionally, these may be used alone or in combination of two or more types.

In specific embodiments, examples of the aliphatic dicarboxylic acid include adipic acid, sebacic acid, succinic acid, glutaric acid, azelaic acid, dodecanedioic acid, dimer acid, and cyclohexanedicarboxylic acid. It is not limited to this. Additionally, these may be used alone or in combination of two or more types.

In embodiments, the polyamide resin is polyamide 6, polyamide 66, polyamide 46, polyamide 11, polyamide 12, polyamide 610, polyamide 612, polyamide 6I, polyamide 6T, polyamide 4T, polyamide 410, polyamide 510, polyamide 1010, polyamide 1012, polyamide 10T, polyamide 1212, polyamide 12T, polyamide MXD6, or a combination thereof.

In a specific example, the polyamide resin may be polyamide 66.

In a specific example, the polyamide resin is about 40 to about 70% by weight of 100% by weight of the basic material ((A) polyamide resin, (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, and (D) glass fiber). , for example, about 50 to about 70% by weight, for example, about 50 to about 60% by weight. When the content of the polyamide resin satisfies the above-mentioned range, the thermoplastic resin composition and molded articles manufactured therefrom can exhibit excellent mechanical properties due to the polyamide resin.

(B) Phosphorus-based flame retardants

The phosphorus-based flame retardant according to one embodiment of the present invention is used together with the melamine-based flame retardant described later to enhance the flame retardancy of the thermoplastic resin composition and achieve a high level of flame retardancy. As the phosphorus-based flame retardant, a typical phosphorus-based flame retardant used to reinforce the flame retardancy of a thermoplastic resin composition can be used.

In an embodiment, the phosphorus-based flame retardant is a phosphate compound, a phosphonate compound, a phosphinate compound, a phosphine oxide compound, a phosphazene compound, or these. Metal salts, etc. can be used. The phosphorus-based flame retardants can be used alone or in combination of two or more types.

In one embodiment, the phosphorus-based flame retardant is aluminum diethyl phosphinate, triphenyl phosphate, ammonium polyphosphate, resorcinol-di(bis-2,6-dimethylphenyl) ) phosphate (resorcinol-di(bis-2,6-dimethylphenyl) phosphate), bisphenol A diphenyl phosphate, cyclophosphazene, diethyl phosphinate ammonium salt, Or it may include a combination thereof.

In an embodiment, the phosphorus-based flame retardant may be aluminum diethyl phosphinate.

In an embodiment, the phosphorus-based flame retardant is about 5 to about 10% by weight, based on 100% by weight of the base material ((A) polyamide resin, (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, and (D) glass fiber). For example, it may be included in about 5 to about 8 weight percent. Within the above range, the thermoplastic resin composition may have excellent flame retardancy and, at the same time, excellent mechanical properties and moldability.

(C) Melamine-based flame retardant

The melamine-based flame retardant according to one embodiment of the present invention is used together with the phosphorus-based flame retardant to enhance the flame retardancy of the thermoplastic resin composition and achieve a high level of flame retardancy. As the melamine-based flame retardant, a typical melamine-based flame retardant used to reinforce the flame retardancy of a thermoplastic resin composition can be used.

In one embodiment, the melamine-based flame retardant may include melamine polyphosphate, melamine phosphate, melamine pyrophosphate, or a combination thereof.

In a specific example, the melamine-based flame retardant may be melamine polyphosphate.

In a specific example, the melamine-based flame retardant is about 2 to about 5% by weight based on 100% by weight of the base material ((A) polyamide resin, (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, and (D) glass fiber). , for example, may be included in about 2 to about 3% by weight. Within the above range, the thermoplastic resin composition may have excellent flame retardancy and, at the same time, excellent mechanical properties and moldability.

(D) Glass fiber

Glass fiber according to one embodiment of the present invention not only improves mechanical properties such as tensile strength of a thermoplastic resin composition, but also plays a role in improving flame retardancy. As the glass fiber, glass fiber used in conventional thermoplastic resin compositions can be used.

In embodiments, the average diameter of the glass fibers may range from about 1 to about 20 μm, such as from about 1 to about 15 μm, such as from about 1 to about 10 μm, such as from about 1 to about 5 μm. It may be ㎛, but is not limited thereto.

In embodiments, the average length of the glass fibers before processing may be less than or equal to about 10 mm, such as about 1 to about 8 mm, such as about 1 to about 5 mm, such as about 1 to about 3 mm. However, it is not limited to this. When the average diameter and average length of the glass fiber are within the above range, mechanical properties, etc. may be excellent.

In a specific example, the glass fiber may have a circular, oval, rectangular, or dumbbell-shaped cross-section, and two or more types with different cross-sectional shapes, average diameters, and average lengths may be used as a mixture. there is.

In a specific example, the surface of the glass fiber may be treated with a certain surface treatment agent to improve adhesion between the glass fiber and the thermoplastic resin. Depending on the type of surface treatment agent, the fluidity and impact strength of the thermoplastic resin composition may vary.

In specific examples, silane-based compounds, epoxy-based compounds, and urethane-based compounds may be used as the surface treatment agent, and commonly commercialized surface treatment agents may be used without limitation.

In a specific example, the glass fiber is about 20 to about 50% by weight of 100% by weight of the basic material ((A) polyamide resin, (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, and (D) glass fiber). For example, it may be included in about 20 to about 40% by weight, for example, about 30 to about 40% by weight. Within the above range, the thermoplastic resin composition and molded articles manufactured therefrom may exhibit excellent mechanical properties and flame retardancy.

(E) Zinc borate

Zinc borate according to one embodiment of the present invention can improve the flame retardancy of a thermoplastic resin composition.

In a specific example, the amount of zinc borate is about 0.5 to about 3 parts by weight based on about 100 parts by weight of the base material ((A) polyamide resin, (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, and (D) glass fiber). It may be included in parts by weight, for example, about 0.5 to about 2 parts by weight. Within the above range, the flame retardancy of the thermoplastic resin composition and molded products using the same may be excellent.

(F) Ionomer

The ionomer according to one embodiment of the present invention can provide excellent laser transmittance to a thermoplastic resin composition. An ionomer generally refers to a material containing a small amount of ionic groups in the chain of a non-polar polymer resin, and the structure, physical properties, morphology, etc. of the polymer resin can be controlled by introducing ionic groups into the polymer structure.

In an embodiment, the ionomer may include at least one of ethylene, methacrylic acid, or acrylate derivatives and a metal ion in the repeating unit.

In a specific example, the ionomer can be synthesized by bridging a copolymer of ethylene and methacrylic acid with a metal ion, and the ionomer can be synthesized by bridging a terpolymer of ethylene, methacrylic acid, and acrylate with a metal ion. can also be synthesized.

In a specific example, the ionomer is one in which the carboxylic acid of methacrylic acid is neutralized with a metal ion in the molecule of ethylene-methacrylic acid copolymer. ) can be used.

In a specific example, the ionomer may be an ionomer having a repeating unit neutralized with sodium ions as represented by the following formula (1).

[Formula 1]

In Formula 1, m and n are integers from 2 to 30,000.

In an embodiment, the ionomer has a weight average molecular weight measured by gel permeation chromatography (GPC) of about 10,000 to about 100,000 g/mol, for example, about 30,000 to about 100,000 g/mol, for example It may be about 50,000 to about 100,000 g/mol.

In an embodiment, the ionomer is used in an amount of about 1 to about 3, based on about 100 parts by weight of the base material ((A) polyamide resin, (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, and (D) glass fiber). It may be included in parts by weight, for example, about 1 to about 2 parts by weight. When the content of the ionomer satisfies the above-mentioned range, the thermoplastic resin composition and molded articles manufactured therefrom can exhibit excellent laser transmittance.

(G) Additives

In addition to the components (A) to (F), the thermoplastic resin composition according to an embodiment of the present invention is capable of exhibiting excellent flame retardancy, impact resistance, fluidity, and laser transmittance, while maintaining a balance between each physical property, or the thermoplastic resin composition. Depending on the final use of the resin composition, one or more necessary additives may be further included.

In an embodiment, the additive may be at least one selected from antibacterial agents, nucleating agents, coupling agents, fillers, plasticizers, lubricants, mold release agents, heat stabilizers, antioxidants, ultraviolet stabilizers, pigments, and dyes.

In specific examples, these additives may be appropriately included within a range that does not impair the physical properties of the thermoplastic resin composition. For example, they may be included in an amount of about 20 parts by weight or less based on about 100 parts by weight of the base material, but are limited thereto. It doesn't work.

Meanwhile, the thermoplastic resin composition can also be used by mixing with other resins or other rubber components.

The molded article according to the present invention is manufactured from the above thermoplastic resin composition. The thermoplastic resin composition can be manufactured in the form of pellets, etc., and the manufactured pellets can be manufactured by various methods known in the art, such as injection molding and extrusion molding.

In a specific example, the molded product may have a flame resistance of V-0 or higher as measured on a 1.5 mm thick specimen according to the UL94 standard.

In embodiments, the molded article may have a laser transmittance of about 20 to about 50% at a wavelength of 980 nm for a 1.5 mm thick specimen.

In a specific example, the molded article may have a notched Izod impact strength of about 8 kgf·cm/cm or more as measured on a 1/8 inch thick specimen according to the ASTM D256 standard.

In a specific example, the molded article may have a melt-flow index of about 85 g/10min or more as measured at 275°C and a load of 2.16 kg according to the ASTM D1238 standard.

Hereinafter, the present invention will be described in more detail through examples, but these examples are for illustrative purposes only and should not be construed as limiting the present invention.

Example

Hereinafter, the specifications of each component used in the examples and comparative examples are as follows.

(A) Polyamide resin

Polyamide 66 resin (product name: Leona ^TM 1200) from Ashahi Kasei Corp. was used.

(B) Phosphorus-based flame retardants

Aluminum diethylphosphinate (product name: Exolite® OP 1230) from Clariant was used.

(C) Melamine-based flame retardant

BASF's melamine polyphosphate (product name: Melapur® 200) was used.

(D) Glass fiber

Glass fiber (product name: ECS03T-251H) manufactured by Nippon Electric Glass was used, with a circular cross-section, a diameter of approximately 10 ㎛, an average length before processing of approximately 3 mm, and surface-treated with a urethane-based compound.

(E) Zinc borate

U.S. Zinc borate (product name: Firebrake® 500) from Borax was used.

(F) Ionomer

Dow's ethylene-methacrylic acid copolymer ionomer (product name: Surlyn ^TM 8920) was used.

Examples 1 to 2 and Comparative Examples 1 to 6

Each of the above components is continuously and quantitatively introduced into the supply section (barrel temperature: approximately 260°C) of a twin-screw extruder (L/D=44, diameter=45 mm) in the amounts and ratios shown in Table 1 below, and extruded/kneaded. A thermoplastic resin composition in the form of a pellet was prepared. Next, the thermoplastic resin composition was dried at about 80°C for about 2 hours, and then using a 6 oz injection molding machine, the cylinder temperature was set to about 250°C and the mold temperature was set to about 60°C to prepare a specimen for measuring physical properties. The physical properties of the manufactured specimen were evaluated by the following method, and the results are shown in Table 1 below.

How to measure physical properties

(1) Flame retardancy (unit: grade): The flame retardancy grade was evaluated for 1.5 mm thick specimens according to the UL94 standard.

(2) Impact resistance (unit: kgf·cm/cm): Notched Izod impact strength was measured for 1/8 inch thick specimens according to ASTM D256 standard.

(3) Fluidity (unit: g/10min): Melt-flow index (MI) was measured at 275°C and 2.16 kg load according to ASTM D1238 standard.

(4) Mechanical properties (unit: kgf/cm ² ): Tensile strength was measured at a tensile speed of 5 mm/min for a 3.2 mm thick specimen according to ASTM D638 standard.

(5) Laser transmittance (unit: %): The laser transmittance at a wavelength of 980 nm for a 1.5 mm thick specimen was measured using an Eve Laser laser transmittance meter (product name: ETM-31).

	Example		Comparative example
	One	2	One	2	3	4	5	6
(A) (% by weight)	54	54	54	54	54	54	65	65
(B) (% by weight)	8	8	8	8	8	11	0	0
(C) (% by weight)	3	3	3	3	3	0	0	0
(D) (% by weight)	35	35	35	35	35	35	35	35
(E) (parts by weight)	One	One	One	One	0	One	0	0
(F) (part by weight)	One	2	0	5	0.8	One	2	0
Flame retardant rating	V-0	V-0	V-0	V-1	other than grade	other than grade	other than grade	other than grade
Notched Izod Impact Strength	8.5	9.3	8.0	11.0	8.8	8.0	11.0	13.0
liquid index	85.0	92.5	30.4	9.5	75.0	87.0	30.4	72.0
tensile strength	1,550	1,520	1,680	1,810	1,430	1,490	1,680	1,560
laser transmittance	20	21	14	15	15	19	37	33

* Parts by weight: Parts by weight per 100 parts by weight of basic materials (A, B, C and D)

From the above results, the thermoplastic resin composition of the present invention has excellent impact resistance (notched Izod impact strength), fluidity (flow index), mechanical properties (tensile strength), and flame retardancy (flame retardant grade), and has excellent laser transmittance of 20% or more. You can confirm that it can be maintained.

On the other hand, in the case of Comparative Example 1 (F) where ionomer was not applied, fluidity, laser transmittance, etc. were found to be reduced, and in the case of Comparative Example 2 (F) where an excessive amount of ionomer was applied, flame retardancy, fluidity, laser transmittance, etc. It can be seen that this decreases, and in the case of Comparative Example 3 in which (F) a small amount of ionomer is applied and (E) zinc borate is not applied, flame retardancy, fluidity, laser transmittance, etc. are decreased. In addition, in the case of Comparative Example 4 in which (B) an excessive amount of the phosphorus-based flame retardant was applied and (C) the melamine-based flame retardant was not applied, it can be seen that the flame retardancy and laser transmittance, etc. were reduced, and (B) the phosphorus-based flame retardant and (C) melamine In the case of Comparative Example 5 in which the flame retardant and (E) zinc borate were not applied, it can be seen that flame retardancy, fluidity, etc. were reduced, and (B) phosphorus-based flame retardant, (C) melamine-based flame retardant, (E) zinc borate and (F) ) In the case of Comparative Example 6 where ionomer was not applied, it can be seen that flame retardancy, fluidity, etc. are reduced.

So far, the present invention has been examined focusing on the embodiments. A person skilled in the art to which the present invention pertains will understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative rather than a restrictive perspective. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as being included in the present invention.

Claims (15)

1. (A) about 40 to about 70% by weight of polyamide resin;

   (B) about 5 to about 10 weight percent of a phosphorus-based flame retardant;

   (C) about 2 to about 5% by weight of a melamine-based flame retardant; and

   (D) About 100 parts by weight of the basic material containing about 20 to about 50% by weight of glass fiber,

   (E) about 0.5 to about 3 parts by weight of zinc borate; and

   (F) about 1 to about 3 parts by weight of an ionomer; a thermoplastic resin composition comprising:
2. The method of claim 1, wherein the polyamide resin is polyamide 6, polyamide 66, polyamide 46, polyamide 11, polyamide 12, polyamide 610, polyamide 612, polyamide 6I, polyamide 6T, polyamide 4T. , polyamide 410, polyamide 510, polyamide 1010, polyamide 1012, polyamide 10T, polyamide 1212, polyamide 12T, polyamide MXD6, or a combination thereof.
3. The thermoplastic resin composition according to claim 1 or 2, wherein the polyamide resin is polyamide 66.
4. The method of any one of claims 1 to 3, wherein the phosphorus-based flame retardant is aluminum diethyl phosphinate, triphenyl phosphate, ammonium polyphosphate, resorcinol-di(bis-2,6-dimethylphenyl) phosphate, A thermoplastic resin composition comprising any one of bisphenol A diphenyl phosphate, cyclophosphazene, diethyl phosphinate ammonium salt, or a combination thereof.
5. The thermoplastic resin composition according to any one of claims 1 to 4, wherein the phosphorus-based flame retardant is aluminum diethyl phosphinate.
6. The thermoplastic resin composition according to any one of claims 1 to 5, wherein the melamine-based flame retardant is any one of melamine polyphosphate, melamine phosphate, melamine pyrophosphate, or a combination thereof.
7. The thermoplastic resin composition according to any one of claims 1 to 6, wherein the melamine-based flame retardant is melamine polyphosphate.
8. The method according to any one of claims 1 to 7, wherein the ionomer is an ethylene-methacrylic acid copolymer in which ethylene and methacrylic acid are copolymerized, and the carboxylic acid of the methacrylic acid is neutralized with a metal ion in the molecule. A thermoplastic resin composition comprising:
9. The thermoplastic resin composition according to any one of claims 1 to 8, wherein the ionomer has a weight average molecular weight of about 10,000 to about 100,000 g/mol.
10. The method of any one of claims 1 to 9, wherein the thermoplastic resin composition contains an antibacterial agent, a flame retardant, a nucleating agent, a coupling agent, a filler, a plasticizer, an impact modifier, a lubricant, a mold release agent, a heat stabilizer, an antioxidant, an ultraviolet stabilizer, a pigment, A thermoplastic resin composition further comprising at least one additive selected from dyes.
11. A molded article manufactured from the thermoplastic resin composition according to any one of claims 1 to 10.
12. The molded product according to claim 11, wherein the molded product has a flame resistance of V-0 or higher as measured on a 1.5 mm thick specimen according to the UL94 standard.
13. 13. The molded article of claim 11 or 12, wherein the molded article has a laser transmittance of about 20 to about 50% at a wavelength of 980 nm for a 1.5 mm thick specimen.
14. The molded article according to any one of claims 11 to 13, wherein the molded article has an Izod impact strength measured on a 1/8 inch thick specimen according to the ASTM D256 standard of about 8 kgf·cm/cm or more.
15. The molded article according to any one of claims 11 to 14, wherein the molded article has a flow index of about 85 g/10 min or more as measured at 275°C and a load of 2.16 kg according to ASTM D1238 standard.