Sea-island composite fiber

Patent metadata

Field	Value
Publication number	US-9758904-B2
Application number	US-201514600045-A
Country	US
Kind code	B2
Filing date	Jan 20, 2015
Priority date	Jan 29, 2010
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A sea-island composite fiber includes island component fibers having a circumscribed circle diameter of 10 to 1000 nm, a circumscribed circle diameter variation of 1 to 20%, a non-circularity of 1.2 to 5.0, and a non-circularity variation of 1 to 10%.

First claim

The invention claimed is:

1. A sea-island composite fiber comprising island component fibers having a circumscribed circle diameter of 10 to 1000 nm, a circumscribed circle diameter variation of 1 to 20%, a non-circularity of 1.5 to 5.0, and a non-circularity variation of 1 to 10%.

2. The sea-island composite fiber according to claim 1 , wherein in a cross section in a direction perpendicular to a fiber axis of each of the island component fibers, an outline of the cross section has at least 2 or more straight line segments.

3. The sea-island composite fiber according to claim 2 , wherein each of angles θ at intersection points formed between the straight line segments satisfies the following formula:

25
⁢

(

5
⁢
n

-
9

)

n

≤
θ
≤
170

where n is the number of intersections points and n is an integer of 2 or more.

4. The sea-island composite fiber according to claim 1 , wherein there are 3 or more intersection points formed between the straight line segments.

5. A textile product, at least a part of which comprises the fibers of claim 1 .

6. The sea-island composite fiber set forth in claim 1 obtained with a composite spinneret comprising:
a metering plate having multiple metering holes for metering respective component polymers;
a distribution plate with multiple distribution holes formed in the distribution grooves for joining the polymer streams discharged from the metering holes; and
a discharge plate,
wherein a constituent distribution plate immediately above the discharge plate of the composite spinneret has multiple distribution holes formed for at least one component polymer to surround the outermost layer of the composite polymer stream.

Assignees

• Toray Industries

Inventors

• Masuda Masato
• Kishiro Akira
• Funakoshi Joji
• Funatsu Yoshitsugu
• Mizukami Seiji

Classifications

• D10B2331/02

  polyamides (D10B2331/08 takes precedence) · CPC title

• D10B2331/04

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

• Y10T428/2976

  Longitudinally varying · CPC title

• D01D5/06

  Wet spinning methods {(D01D5/0046 takes precedence)} · CPC title

• Y10T428/2931

  Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.] · CPC title