Glass fiber reinforced polyamide composition and the process for manufacturing the same

• US 5,250,604 A
• Filed: 04/09/1992
• Issued: 10/05/1993
• Est. Priority Date: 05/17/1990
• Status: Expired due to Term

• Current Assignee: Kisco Limited (Otsuka Holdings Company Limited)
• Original Assignee: Kishimoto Sangyo Co., Ltd
• Inventors: Tsutsui, Kenji, Moriwaki, Takeshi
• Primary Examiner(s): Michl, Paul R.
• Assistant Examiner(s): RAJGURU, UMAKANT K
• Application Number:
  US07/867,000
• Time in Patent Office: 544 Days
• Field of Search: 524/494, 524/606, 525/432
• US Class Current: 524/494
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers

Abstract

Polyamide composition having a high strength, high-rigidity and high impact characteristics with a smooth surface and improved in the decrease of physical properties by water absorption are made by compounding 100-250 parts by weight of glass fiber and 100 parts of weight of a mixture of 95-60 parts by weight of crystalline aliphatic polyamide, 0.2-10 parts by weight of crystalline copolyamide and 5-40 parts by weight of amorphous polyamide.

Claims

1. Glass fiber reinforced polyamide composition comprising:

(A) 100 parts by weight of the mixture of (a) 95-60 parts by weight of crystalline aliphatic polyamide, (b) 5-40 parts by weight of amorphous polyamide and (c) 0.2-10 parts by weight of crystalline aliphatic copolyamide having a melting point at least 20°

C. lower than that of the crystalline polyamide of (a), and

(B) 100-250 parts by weight of glass fiber.

2. A process of manufacturing fiber reinforced polyamide wherein a tumble blend of:

(A) 100 parts by weight of the mixture of (a) 95-60 parts by weight of crystalline aliphatic polyamide, (b) 5-40 parts by weight of amorphous polyamide and (c) 0.2-10 parts by weight of crystalline aliphatic copolyamide having a melting point at least 20°

C. lower than that of the crystalline polyamide of (a), and

(B) 100-250 parts by weight of glass fiber, are injection-molded by an injection molding machine equipped with a kneading mechanism.