# US 2024/0200232 A1 · Heat-fusible composite fiber and non-woven fabric using same

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- Number: US 2024/0200232 A1
- Document ID: US20240200232A1
- Status: Published application
- Kind: A1
- Application number: 18/285,655
- Filed: 2022-02-09
- Published: 2024-06-20
- Earliest claimed: 2021-04-07
- Assignees: ES FiberVisions LP; ES FiberVisions Hong Kong Limited; ES Indorama Ventures Hygiene Denmark ApS
- Applicants: ES FiberVisions Co., Ltd.; ES FiberVisions Hong Kong Limited; ES FiberVisions LP; ES Indorama Ventures Hygiene Denmark ApS
- Inventors: Tomoyuki WADA
- Web page: https://patentgrep.com/patent/US20240200232A1

## CPC

- D01F 8/14: with at least one polyester as constituent
- D01F 8/06: with at least one polyolefin as constituent
- D04H 1/4291: Olefin series
- D04H 1/43825: {Composite fibres}
- D04H 1/541: Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H 1/5412: {sheath-core}
- D01D 5/34: Core-skin structure; Spinnerette packs therefor
- D10B 2321/021: polyethylene
- D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET]
- D10B 2401/04: Heat-responsive characteristics
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

The purpose of the present invention is to provide a heat-fusible composite fiber that reduces the consumption of fossil resources and imparts both bulkiness and flexibility to non-woven fabrics, and a non-woven fabric using the heat-fusible composite fiber. Provided is a heat-fusible composite fiber in which a first component is configured from a polyester resin and a second component is configured from a polyethylene resin having a lower melting point than the first component, the mixing ratio (weight ratio) of a biomass-derived polyethylene resin and a fossil-resource-derived polyethylene resin in the polyethylene resin being 20:80 to 90:10.

## Claims

### Claim 1

A heat-fusible composite fiber comprising:
a first component configured from a polyester resin; and
a second component configured from a polyethylene resin having a lower melting point than that of the first component,
wherein a mixing ratio (weight ratio) of a biomass-derived polyethylene resin and a fossil-resource-derived polyethylene resin in the polyethylene resin is 20:80 to 90:10.

### Claim 2 (depends on 1)

The heat-fusible composite fiber according to claim 1, wherein a biomass-derived carbon content in the polyethylene resin is 20% to 90%.

### Claim 3 (depends on 1)

The heat-fusible composite fiber according to claim 1, wherein a biomass-derived carbon content in the heat-fusible composite fiber is 10% or more.

### Claim 4 (depends on 1)

The heat-fusible composite fiber according to claim 1, wherein a biomass-derived carbon content in the polyester resin is 30% or less.

### Claim 5 (depends on 1)

The heat-fusible composite fiber according to claim 1, wherein a fineness of the heat-fusible composite fiber is 2.2 dtex or less.

### Claim 6 (depends on 1)

The heat-fusible composite fiber according to claim 1, wherein a heat of fusion of the polyester resin in the heat-fusible composite fiber is 24 J/g or more.

### Claim 7 (depends on 1)

The heat-fusible composite fiber according to claim 1,
wherein the heat-fusible composite fiber is a sheath-core type heat-fusible composite fiber comprising:
the first component as a core component; and
the second component as a sheath component.

### Claim 8 (depends on 1)

The heat-fusible composite fiber according to claim 1, wherein the polyester resin is polyethylene terephthalate, and the polyethylene resin is high-density polyethylene.

### Claim 9 (depends on 1)

A non-woven fabric, comprising the heat-fusible composite fiber according to claim 1.

### Claim 10 (depends on 1)

An absorbent article, using the heat-fusible composite fiber according to claim 1.