# US 2021/0277541 A1 · Composite yarn

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- Number: US 2021/0277541 A1
- Document ID: US20210277541A1
- Status: Published application
- Kind: A1
- Application number: 17/188,800
- Filed: 2021-03-01
- Published: 2021-09-09
- Earliest claimed: 2020-03-03
- Inventors: Chun Wei Lin
- Web page: https://patentgrep.com/patent/US20210277541A1

## CPC

- D01F 8/04: from synthetic polymers
- D01F 8/16: with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
- D01D 11/06: Coating with spinning solutions or melts
- D01F 1/10: Other agents for modifying properties
- D01F 8/08: with at least one polyacrylonitrile as constituent
- D01F 8/10: with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
- D01F 8/12: with at least one polyamide as constituent
- D01F 8/14: with at least one polyester as constituent
- D02G 3/36: Cored or coated yarns or threads ({D02G3/34, D02G3/40 take precedence}; elastic yarns or threads D02G3/32)
- D06M 15/347: of unsaturated ethers, acetals, hemiacetals, ketones or aldehydes
- D10B 2321/10: polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
- D10B 2331/02: polyamides (D10B2331/08 takes precedence)
- D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET]
- 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
- D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

Provided is a composite yarn. The composite yarn includes a core and a sheath. The core is made of a thermoplastic material; wherein the thermoplastic material is selected from a group consisting of: a polyester, a polyamide, a polyacrylonitrile and any combination thereof. The sheath formed around the core is made of a cladding material, and the cladding material comprises polyvinyl butyral; wherein the polyvinyl butyral has a melt flow rate ranging from 2 g/10 min to 35 g/10 min; the melt flow rate is measured by a standard method ASTM D1238 at 190° C. with 2.16 kg load.

## Claims

### Claim 1

A composite yarn, comprising:
a core which is made of a thermoplastic material; wherein the thermoplastic material is selected from a group consisting of: a polyester, a polyamide, a polyacrylonitrile and any combination thereof; and
a sheath which is formed around the core; wherein the sheath is made of a cladding material, and the cladding material comprises polyvinyl butyral; wherein the polyvinyl butyral has a melt flow rate ranging from 2 grams per 10 minutes to 35 grams per 10 minutes; the melt flow rate is measured by a standard method ASTM D1238 at 190° C. with 2.16 kilograms load.

### Claim 2 (depends on 1)

The composite yarn as claimed in claim 1, wherein the sheath has a thickness ranging from 0.08 millimeters to 5.0 millimeters.

### Claim 3 (depends on 1)

The composite yarn as claimed in claim 1, wherein the sheath has a thickness ranging from 0.08 millimeters to 0.9 millimeters.

### Claim 4 (depends on 1)

The composite yarn as claimed in claim 1, wherein the cladding material further comprises a thermoplastic polyurethane.

### Claim 5 (depends on 4)

The composite yarn as claimed in claim 4, wherein the thermoplastic polyurethane is in an amount from larger than 0 part by weight to 100 parts by weight relative to 100 parts by weight of the polyvinyl butyral.

### Claim 6 (depends on 1)

The composite yarn as claimed in claim 1, wherein the cladding material further comprises a plasticizer.

### Claim 7 (depends on 6)

The composite yarn as claimed in claim 6, wherein the plasticizer is in an amount from 20 parts by weight to 100 parts by weight relative to 100 parts by weight of the polyvinyl butyral.

### Claim 8 (depends on 4)

The composite yarn as claimed in claim 4, wherein the cladding material further comprises a plasticizer.

### Claim 9 (depends on 8)

The composite yarn as claimed in claim 8, wherein the plasticizer is in an amount from 20 parts by weight to 100 parts by weight relative to 100 parts by weight of the polyvinyl butyral.

### Claim 10 (depends on 1)

The composite yarn as claimed in claim 1, wherein the polyvinyl butyral has the melt flow rate ranging from 7 grams per 10 minutes to 15 grams per 10 minutes; the melt flow rate is measured by the standard method ASTM D1238 at 190° C. with 2.16 kilograms load.

### Claim 11 (depends on 6)

The composite yarn as claimed in claim 6, wherein the polyvinyl butyral has the melt flow rate ranging from 7 grams per 10 minutes to 15 grams per 10 minutes; the melt flow rate is measured by the standard method ASTM D1238 at 190° C. with 2.16 kilograms load.

### Claim 12 (depends on 7)

The composite yarn as claimed in claim 7, wherein the polyvinyl butyral has the melt flow rate ranging from 7 grams per 10 minutes to 15 grams per 10 minutes; the melt flow rate is measured by the standard method ASTM D1238 at 190° C. with 2.16 kilograms load.