# US 2014/0193640 A1 · Islands-in-sea fiber

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- Number: US 2014/0193640 A1
- Document ID: US20140193640A1
- Status: Published application
- Kind: A1
- Application number: 14/237,368
- Filed: 2012-07-24
- Published: 2014-07-10
- Earliest claimed: 2011-08-11
- Assignees: Toray Industries, Inc.
- Inventors: Masato Masuda; Joji Funakoshi
- Web page: https://patentgrep.com/patent/US20140193640A1

## CPC

- D01F 8/04: from synthetic polymers
- D01D 5/36: Matrix structure; Spinnerette packs therefor
- Y10T 428/2933: Coated or with bond, impregnation or core
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An islands-in-sea fiber includes island components and a sea component arranged to surround the island components, wherein the island components and the sea component are composed of at least two polymers and are provided on a fiber cross-section in a direction perpendicular to the fiber axis. The islands-in-sea fiber is a raw yarn for a combined filament yarn, which can be used to produce a cloth having good tension and drape and an excellent color-developing property. An islands-in-sea fiber in which at least two types of island components having different diameters are arranged on the same fiber cross section, the islands-in-sea fiber characterized in that at least one type of the island components have diameters of 10-1000 nm and have fluctuations in diameters of 1.0-20.0%.

## Claims

### Claim 1

A sea-island composite fiber having a cross section containing a plurality of island components having different island diameters, at least one of the island components having island diameters of 10 to 1,000 nm with a diameter variation of 1.0 to 20.0%.

### Claim 2 (depends on 1)

The sea-island composite fiber as specified in claim 1, wherein differences in island diameter among the island components are 300 to 3,000 nm.

### Claim 3 (depends on 1)

The sea-island composite fiber as specified in claim 1, wherein island component A having island diameters of 10 to 1,000 nm is disposed around island component B having island diameters of 1,000 to 4,000 nm.

### Claim 4 (depends on 1)

A combined filament yarn produced by removing a sea component from sea-island composite fiber specified in claim 1.

### Claim 5 (depends on 1)

A fiber product at least partially comprising fiber specified in claim 1.

### Claim 6 (depends on 2)

The sea-island composite fiber as specified in claim 2, wherein island component A having island diameters of 10 to 1,000 nm is disposed around island component B having island diameters of 1,000 to 4,000 nm.

### Claim 7 (depends on 2)

A combined filament yarn produced by removing a sea component from sea-island composite fiber specified in claim 2.

### Claim 8 (depends on 3)

A combined filament yarn produced by removing a sea component from sea-island composite fiber specified in claim 3.

### Claim 9 (depends on 2)

A fiber product at least partially comprising fiber specified in claim 2.

### Claim 10 (depends on 3)

A fiber product at least partially comprising fiber specified in claim 3.

### Claim 11 (depends on 4)

A fiber product at least partially comprising fiber specified in claim 4.