Polyamide Resin Composition and Molded Article Produced Therefrom

• US 20170190883A1
• Filed: 12/29/2016
• Published: 07/06/2017
• Est. Priority Date: 12/31/2015
• Status: Active Grant

• Current Assignee: Lotte Advanced Materials Co., Ltd. (Lotte Chemical Corporation)
• Original Assignee: Lotte Advanced Materials Co., Ltd. (Lotte Chemical Corporation)
• Inventors: KIM, Kyung Rae, KIM, Ik Mo, SHIN, Chan Gyun
• Granted Patent: US 10,457,796 B2
• Time in Patent Office: Days
• CPC Class Codes: C08K 2201/003 Additives being defined by their diameter
• CPC Class Codes: C08K 2201/004 Additives being defined by their length
• CPC Class Codes: C08K 2201/005 Additives being defined by their particle size in general
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/041 Carbon nanotubes
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 77/06 Polyamides derived from polyamines and polycarboxylic acids C08L77/10 takes precedence

Abstract

Provided are a polyamide resin composition and a molded article produced therefrom. The polyamide resin composition includes: a base resin including a polyamide resin having an intrinsic viscosity (IV) of about 0.9 dL/g or less and milled glass fibers; and carbon nanotube flakes having a size of about 1.0 mm to about 5.0 mm.

Claims

1. A polyamide resin composition comprising:

a base resin comprising a polyamide having an intrinsic viscosity (IV) of about 0.9 dL/g or less, and milled glass fibers; and

carbon nanotube flakes having a size of about 1.0 mm to about 5.0 mm.

2. The polyamide resin composition according to claim 1, wherein the polyamide is polydecamethylene terephthalamide.

3. The polyamide resin composition according to claim 1, wherein the milled glass fibers have an aspect ratio of about 1 or more.

4. The polyamide resin composition according to claim 1, wherein the milled glass fibers have an average diameter of about 10 μ

m to about 13 μ

m and an average length of about 10 μ

m to about 100 μ

m.

5. The polyamide resin composition according to claim 1, wherein the carbon nanotube flakes are obtained by growing carbon nanotubes on glass fibers, followed by removing the glass fibers.

6. The polyamide resin composition according to claim 1, wherein the carbon nanotube flakes are present in an amount of about 0.05 parts by weight to about 5 parts by weight based on about 100 parts by weight of the base resin.

7. The polyamide resin composition according to claim 1, wherein the base resin comprises about 50 wt % to about 80 wt % of the polyamide, which has an intrinsic viscosity of about 0.9 dL/g or less, and about 20 wt % to about 50 wt % of the milled glass fibers.

8. The polyamide resin composition according to claim 1, wherein the polyamide resin composition has a spiral flow length of about 100 mm to about 160 mm, as measured on a specimen obtained by injection molding the polyamide resin composition in a 0.5 mm thick spiral-shaped mold under conditions of a molding temperature of 300°

C., a mold temperature of 80°

C., an injection pressure of 1,500 kgf/cm² and an injection speed of 120 mm/s.

9. The polyamide resin composition according to claim 1, wherein the polyamide resin composition has an amount of abrasion dust of about 0.9 mg or less, as measured after a boss and a rib manufactured using the polyamide resin composition are subjected to reciprocating motion at a rate of 50 cycles/min under a load of 2.5 kg for 2 hours.

10. A molded article produced from the polyamide resin composition according to claim 1.

11. The molded article according to claim 10, wherein the molded article has a surface current discharge time of about 0.1 seconds or less, as measured by a decay time method.

12. The molded article according to claim 10, wherein the molded article is a small camera module.