Liquid-crystalline polymer molding

• US 6,758,989 B2
• Filed: 07/18/2002
• Issued: 07/06/2004
• Est. Priority Date: 01/24/2000
• Status: Active Grant

• Current Assignee: Polyplastics Co., Ltd. (Daicel Corporation)
• Original Assignee: Polyplastics Co., Ltd. (Daicel Corporation)
• Inventors: Nakane, Toshio, Miyashita, Takayuki
• Primary Examiner(s): Huff, Mark F.
• Assistant Examiner(s): Sadula, Jennifer R.
• Application Number:
  US10/181,449
• Publication Number:
  US 20030030031A1
• Time in Patent Office: 719 Days
• Field of Search: 252/299-1-2, 403/220, 285/223
• US Class Current: 252/299.01
• CPC Class Codes: C08K 3/01 characterized by their specific function
• CPC Class Codes: C08K 7/00 Use of ingredients characterised by shape
• CPC Class Codes: C08L 77/12 Polyester-amides
• CPC Class Codes: Y10T 403/45 Flexibly connected rigid members

Abstract

The present invention is to provide a liquid crystal polymer molded article which has an excellent low warpage and is able to be suitably used particularly as a connector or the like. That is, a molded article of a liquid crystal composition in which 100 parts by weight of a liquid crystal polymer (A) and 5-100 parts by weight of a non-fibrous filler (B) are compounded where the non-fibrous filler is so dispersed that, when a diffraction peak of the non-fibrous filler is measured by a transmission method and a reflection method by means of a wide-angle X-ray diffraction, the diffraction peak of the non-fibrous filler which can be confirmed by the reflection method is not confirmed by the transmission method.

Claims

1. A molded article of a liquid crystal polymer composition in which 100 parts by weight of a liquid crystal polymer (A) and 5-100 parts by weight of a non-fibrous filler (B) are compounded where the non-fibrous filler is so dispersed that, when a diffraction peak of the non-fibrous filler is measured by a transmission method and a reflection method by means of a wide-angle X-ray diffraction, the diffraction peak of the non-fibrous filler which can be confirmed by the reflection method is not confirmed by the transmission method.

2. The molded article according to claim 1, wherein the non-fibrous filler (B) is a plate-shaped filler.

3. The molded article according to claim 2, wherein the plate-shaped filler comprises at least one member selected from talc, mica, kaolin and graphite.

4. The molded article according to claim 3, wherein a liquid crystal polymer composition where 5-100 parts by weight of a fibrous filler (C) having an average fiber diameter of 5-20 μ

m and an average aspect ratio of not less than 15 is further compounded to 100 parts by weight of the liquid crystal polymer (A).

5. The molded article according to claim 4, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.

6. The molded article according to claim 3, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.

7. The molded article according to claim 3, wherein the molded article is a connector.

8. The molded article according to claim 2, wherein a liquid crystal polymer composition where 5-100 parts by weight of a fibrous filler (C) having an average fiber diameter of 5-20 μ

m and an average aspect ratio of not less than 15 is further compounded to 100 parts by weight of the liquid crystal polymer (A).

9. The molded article according to claim 8, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.

10. The molded article according to claim 2, wherein the molded article is a connector.

11. The molded article according to claim 1, wherein a liquid crystal polymer composition where 5-100 parts by weight of a fibrous filler (C) having an average fiber diameter of 5-20 μ

m and an average aspect ratio of not less than 15 is further compounded to 100 parts by weight of the liquid crystal polymer (A).

12. The molded article according to claim 11, wherein the fibrous filer (C) comprises glass fiber.

13. The molded article according to claim 12, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.

14. The molded article according to claim 12, wherein the molded article is a connector.

15. The molded article according to claim 11, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.

16. The molded article according to claim 11, wherein the molded article is a connector.

17. The molded article according to claim 1, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.

18. The molded article according to claim 17, wherein the molded article is a connector.

19. The molded article according to claim 1, wherein the molded article is a connector.

20. The molded article according to claim 1, wherein a liquid crystal polymer composition where the liquid crystal polymer (A) is polyester amide.