# US 2023/0054664 A1 · Compostable multi-component constructions

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- Number: US 2023/0054664 A1
- Document ID: US20230054664A1
- Status: Published application
- Kind: A1
- Application number: 17/759,342
- Filed: 2021-01-22
- Published: 2023-02-23
- Earliest claimed: 2020-01-24
- Assignees: 3M Innovative Properties Company
- Applicants: 3M Innovative Properties Company
- Inventors: Mark V. Riofski; Ignatius A. Kadoma; Mikhail A, Belkin; Kristy A. Jost; Colby W. Dotseth; Kenneth A. Cox; Michael P. Mandanas; Xiaoling Huang; Wei Li Hu
- Web page: https://patentgrep.com/patent/US20230054664A1

## CPC

- D01F 8/14: with at least one polyester as constituent
- C08G 63/08: Lactones or lactides
- C08G 63/12: derived from polycarboxylic acids and polyhydroxy compounds
- C08G 63/16: Dicarboxylic acids and dihydroxy compounds
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 77/00: Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers
- C08L 91/06: Waxes
- D01D 5/34: Core-skin structure; Spinnerette packs therefor
- D01F 1/10: Other agents for modifying properties
- D01F 8/12: with at least one polyamide as constituent
- C08G 2230/00: Compositions for preparing biodegradable polymers
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS

## Abstract

The present invention is a multi-component fiber includes a core and a sheathing surrounding the core. The core includes a first aliphatic polyester or copolymer of an aliphatic polyester. The sheathing includes a second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide, and a hydrophobic agent. The second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide has a melt flow index of between about 0.5 and about 19.5 g/10 min using a 2.16 Kg weight at 190° C.

## Claims

### Claim 1

A multi-component fiber comprising:
a core comprising a first aliphatic polyester or copolymer of an aliphatic polyester; and
a sheathing surrounding the core, wherein the sheathing comprises:
a second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide; and
a hydrophobic agent,
wherein the second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide has a melt flow index of between about 0.5 and about 19.5 g/10 min using a 2.16 Kg weight at 190° C., and wherein a polylactic acid is present in the sheathing.

### Claim 2 (depends on 1)

The multi-component fiber of claim 1, wherein the second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide comprises polybutylene succinate.

### Claim 3 (depends on 1)

The multi-component fiber of claim 1, wherein the sheathing consists essentially of the second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide and the hydrophobic agent.

### Claim 4

(canceled)

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The multi-component fiber of claim 1, wherein the hydrophobic agent comprises a wax.

### Claim 7 (depends on 1)

The multi-component fiber of claim 1, wherein the hydrophobic agent comprises a pant-based wax.

### Claim 8 (depends on 7)

The multi-component fiber of claim 7, wherein the plant-based wax is selected from the group consisting of castor wax, ethylene bis(stearamide) (EBS), and soy wax.

### Claim 9 (depends on 1)

The multi-component fiber of claim 1, comprising between about 30 and about 80% core and between about 20 and about 70% sheathing.

### Claim 10 (depends on 1)

The multi-component fiber of claim 1, wherein the sheathing comprises about 65% polybutylene succinate, about 30% polylactic acid, and about 5% plant-based wax.

### Claim 11 (depends on 1)

The multi-component fiber of claim 1, wherein the sheathing comprises about 65% polybutylene succinate, about 30% polylactic acid, and about 5% plant-based wax.

### Claim 12 (depends on 1)

The multi-component fiber of claim 1, wherein the first aliphatic polyester or copolymer of an aliphatic polyester comprises polylactic acid.

### Claim 13 (depends on 1)

The multi-component fiber of claim 1, wherein the first aliphatic polyester or copolymer of an aliphatic polyester and the second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide are the same.

### Claim 14 (depends on 1)

The multi-component fiber of claim 1, wherein the first aliphatic polyester or copolymer of an aliphatic polyester and the second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide are different.