Metal-covered liquid crystal polyester multifilament

Patent metadata

Field	Value
Publication number	US-12410555-B2
Application number	US-202017758639-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Jan 15, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A metal-covered liquid crystal polyester multifilament, comprising: two or more metal-covered liquid crystal polyester monofilaments in which a surface of each liquid crystal polyester monofilament is covered with a metal having a thickness of 0.1 to 20 μm, wherein in a cross-sectional photograph measured by X-ray CT, a percentage of a number of stuck fibers in which the two or more metal-covered liquid crystal polyester monofilaments are stuck is 75% or less with respect to a total number of fibers.

First claim

The invention claimed is:

1. A metal-covered liquid crystal polyester multifilament, comprising:
two or more metal-covered liquid crystal polyester monofilaments;
wherein:
a surface of each monofilament is covered with a metal to a thickness of 0.1 to 20 μm;
a sticking percentage of the multifilament is 75% or less; and
the sticking percentage is a percentage of a number of stuck fibers relative to a total number of fibers in a cross-sectional photograph of the multifilament obtained by X-ray CT.

2. The metal-covered liquid crystal polyester multifilament according to claim 1 , wherein, in a cross-sectional photograph of the multifilament obtained by X-ray CT, a distance between any two farthest points on a surface of a metal covering stuck fibers is 11 times or less a diameter of a single metal-covered monofilament.

3. The metal-covered liquid crystal polyester multifilament according to claim 1 , having a tensile strength of 16 cN/dtex or more.

4. The metal-covered liquid crystal polyester multifilament according to claim 1 , wherein the metal comprises at least one selected from the group consisting of copper, silver, gold, iron, zinc, lead, palladium, nickel, chromium, tin, titanium, aluminum, indium, and vanadium.

5. The metal-covered liquid crystal polyester multifilament according to claim 1 , wherein a fineness of each of the liquid crystal polyester monofilaments is 11 dtex or more.

6. The metal-covered liquid crystal polyester multifilament according to claim 1 , wherein;
a specific resistance value of the multifilament is 25 or less; and
the specific resistance value is a ratio of a resistance value of the multifilament after a bending fatigue test to a resistance value of the multifilament before a bending fatigue test.

7. The metal-covered liquid crystal polyester multifilament according to claim 2 , having a tensile strength of 16 cN/dtex or more.

8. The metal-covered liquid crystal polyester multifilament according to claim 2 , wherein the metal comprises at least one selected from the group consisting of copper, silver, gold, iron, zinc, lead, palladium, nickel, chromium, tin, titanium, aluminum, indium, and vanadium.

9. The metal-covered liquid crystal polyester multifilament according to claim 2 , wherein a fineness of each of the liquid crystal polyester monofilaments is 11 dtex or more.

10. The metal-covered liquid crystal polyester multifilament according to claim 2 , wherein:
a specific resistance value of the multifilament is 25 or less; and
the specific resistance value is a ratio of a resistance value of the multifilament after a bending fatigue test to a resistance value of the multifilament before a bending fatigue test.

11. The metal-covered liquid crystal polyester multifilament according to claim 3 , wherein the metal comprises at least one selected from the group consisting of copper, silver, gold, iron, zinc, lead, palladium, nickel, chromium, tin, titanium, aluminum, indium, and vanadium.

12. The metal-covered liquid crystal polyester multifilament according to claim 3 , wherein a fineness of each of the liquid crystal polyester monofilaments is 11 dtex or more.

13. The metal-covered liquid crystal polyester multifilament according to claim 3 , wherein:
a specific resistance value of the multifilament is 25 or less; and
the specific resistance value is a ratio of a resistance value of the multifilament after a bending fatigue test to a resistance value of the multifilament before a bending fatigue test.

14. The metal-covered liquid crystal polyester multifilament according to claim 4 , wherein a fineness of each of the liquid crystal polyester monofilaments is 11 dtex or more.

15. The metal-covered liquid crystal polyester multifilament according to claim 4 , wherein:
a specific resistance value of the multifilament is 25 or less; and
the specific resistance value is a ratio of a resistance value of the multifilament after a bending fatigue test to a resistance value of the multifilament before a bending fatigue test.

16. The metal-covered liquid crystal polyester multifilament according to claim 5 , wherein:
a specific resistance value of the multifilament is 25 or less; and
the specific resistance value is a ratio of a resistance value of the multifilament after a bending fatigue test to a resistance value of the multifilament before a bending fatigue test.

Assignees

• Kuraray Co

Inventors

• Sakai Tomoki
• Katayama Takashi
• Kawai Hiroyuki
• Nishida Masashi
• Yoshida Tsugumi

Classifications

• D10B2401/16

  antistatic; conductive · CPC title

• D10B2401/063

  high strength · CPC title

• D10B2331/04

  polyesters, e.g. polyethylene terephthalate [PET] · CPC title

• D02G3/045

  all components being made from artificial or synthetic material · CPC title

• D06M10/06

  Inorganic compounds or elements · CPC title