Biodegradable additive, biodegradable polyester fiber and method for producing the same, and biodegradable fabric

Patent metadata

Field	Value
Publication number	US-12065769-B2
Application number	US-202117394534-A
Country	US
Kind code	B2
Filing date	Aug 5, 2021
Priority date	Feb 24, 2021
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A biodegradable additive, a biodegradable polyester fiber and a method for producing the same, and a biodegradable fabric are provided. The biodegradable additive includes a polyester resin material and a biodegradable resin material. The biodegradable resin material is at least one material selected from the group consisting of polybutylene succinate (PBS), polybutylene adipate terephthalate (PBAT), polycaprolactone (PCL), polylactic acid (PLA), and derivatives thereof. In the biodegradable additive, a content range of the polyester resin material is between 40 wt % and 80 wt %, and a content range of the biodegradable resin material is between 20 wt % and 60 wt %.

First claim

What is claimed is:

1. A biodegradable polyester fiber, which is formed through a melt spinning process, the biodegradable polyester fiber comprising:
a polyester resin matrix; and
a biodegradable additive being mixed with the polyester resin matrix through the melt spinning process, wherein the biodegradable additive includes:
a polyester resin material; wherein the polyester resin material is polyethylene terephthalate (PET); wherein the polyester resin material has a first intrinsic viscosity of between 0.6 dL/g and 0.8 dL/g; and
a biodegradable resin material, wherein the biodegradable resin material includes polybutylene succinate (PBS), polybutylene adipate terephthalate (PBAT), and polycaprolactone (PCL); wherein the biodegradable resin material has a second intrinsic viscosity of between 0.9 dL/g and 1.1 dL/g;

wherein, in the biodegradable additive, a weight ratio among polyethylene terephthalate (PET), polybutylene succinate (PBS), polycaprolactone (PCL), and polybutylene adipate terephthalate (PBAT) is 61:14:17:8;
wherein a content of the biodegradable additive added into the polyester resin matrix is 2 wt % or 5 wt %.

2. The biodegradable polyester fiber according to claim 1 , wherein the polyester resin matrix is formed by a regular polyester chip through the melt spinning process, and the biodegradable additive is dispersed into the polyester resin matrix from a biodegradable polyester master-batch through the melt spinning process.

3. The biodegradable polyester fiber according to claim 1 , wherein the biodegradable additive further includes a microbial attractant; wherein the microbial attractant is at least one material selected from the group consisting of a sugar and an alcohol; wherein, in the biodegradable additive, a content range of the microbial attractant is between 0.1 wt % and 1 wt %.

4. The biodegradable polyester fiber according to claim 1 , wherein the biodegradable resin material does not include polylactic acid (PLA).

5. The biodegradable polyester fiber according to claim 1 , wherein the biodegradable polyester fiber has a biodegradation rate of not less than 2.2% when tested according to ASTM D6691 standard test method.

6. A biodegradable fabric formed by interlacing multiple ones of the biodegradable polyester fiber as claimed in claim 1 .

Assignees

• Nan Ya Plastics Corp

Inventors

• Liao Te-Chao
• Hsu Sen-Huang
• Lai Chia-Sheng

Classifications

• D03D15/283

  synthetic polymer-based, e.g. polyamide or polyester fibres (cellulose-based artificial fibres D03D15/225) · CPC title

• D10B2331/041

  derived from hydroxy-carboxylic acids, e.g. lactones · CPC title

• D10B2401/12

  biodegradable · CPC title

• D01D5/10

  using organic materials · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title