Recycled polyethylene terephthalate compositions, fibers and articles produced therefrom, and methods for producing same

Patent metadata

Field	Value
Publication number	US-10131784-B2
Application number	US-201615077521-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Sep 30, 2008
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

In one aspect, the invention relates to recycled polyethylene terephthalate compositions, fibers and articles produced therefrom, and methods for producing same. In a further aspect, the invention relates to homogenized post-consumer polyethylene terephthalate. In a further aspect, the invention relates to extruded polymer compositions, polymer mixtures, fibers, and/or Bulked Continuous Filament fibers comprising post-consumer polyethylene terephthalate. In a further aspect, the invention relates to processes for preparing recycled polyethylene terephthalate compositions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

First claim

What is claimed is:

1. An extruded polymer composition consisting essentially of polyethylene terephthalate polymer composition, wherein the polyethylene terephthalate polymer composition has greater than 10% by weight to about 100% by weight of homogenized curbside post-consumer polyethylene terephthalate and balance virgin polyethylene terephthalate.

2. The composition of claim 1 , wherein the polyethylene terephthalate polymer composition has at least about 25% by weight of homogenized curbside post-consumer polyethylene terephthalate.

3. The composition of claim 1 , wherein the polyethylene terephthalate polymer composition has at least about 50% by weight of homogenized curbside post-consumer polyethylene terephthalate.

4. The composition of claim 1 , wherein the homogenized curbside post-consumer polyethylene terephthalate comprises at least one impurity not present in virgin polyethylene terephthalate.

5. The composition of claim 4 , wherein the at least one impurity comprises floatable contamination in an amount less than 25 ppm, PVC contamination in an amount less than 150 ppm, or a combination thereof.

6. A polymer mixture consisting essentially of a polyethylene terephthalate polymer composition, wherein the polyethylene terephthalate polymer composition has greater than 10% by weight to about 100% by weight of homogeneous curbside post-consumer polyethylene terephthalate and balance virgin polyethylene terephthalate.

7. The mixture of claim 6 , wherein the polyethylene terephthalate polymer composition has at least about 25% by weight of homogenized curbside post-consumer polyethylene terephthalate.

8. The mixture of claim 6 , wherein the polyethylene terephthalate polymer composition has at least about 50% by weight of homogenized curbside post-consumer polyethylene terephthalate.

9. The mixture of claim 6 , wherein the homogenized curbside post-consumer polyethylene terephthalate comprises at least one impurity not present in virgin polyethylene terephthalate.

10. The mixture of claim 9 , wherein the at least one impurity comprises floatable contamination in an amount less than 25 ppm, PVC contamination in an amount less than 150 ppm, or a combination thereof.

11. A carpet comprising a fiber consisting essentially of a polyethylene terephthalate polymer composition, wherein the polyethylene terephthalate polymer composition has greater than 10% by weight to about 100% by weight of homogenized curbside post-consumer polyethylene terephthalate and balance virgin polyethylene terephthalate.

12. The carpet of claim 11 , wherein the polyethylene terephthalate polymer composition has at least about 25% by weight of homogenized curbside post-consumer polyethylene terephthalate.

13. The carpet of claim 11 , wherein the polyethylene terephthalate polymer composition has at least about 50% by weight of homogenized curbside post-consumer polyethylene terephthalate.

14. The carpet of claim 11 , wherein the homogenized curbside post-consumer polyethylene terephthalate comprises at least one impurity not present in virgin polyethylene terephthalate.

15. The carpet of claim 14 , wherein the at least one impurity comprises floatable contamination in an amount less than 25 ppm, PVC contamination in an amount less than 150 ppm, or a combination thereof.

16. The carpet of claim 11 , wherein the curbside polyethylene terephthalate exhibits a bulk density of 20-27 lb/ft 3 , a moisture content of less than 1.0%, and a pressure rise of less than 75 psi/lb.

Assignees

• Columbia Insurance Co

Inventors

• Booth Hubert J
• Bradley Christopher Eric
• Johnson Daniel Ray
• Keen Jr James Henry

Classifications

• D01F6/62

  from polyesters · CPC title

• C08J11/04

  of polymers · CPC title

• Y10T428/1362

  Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.] · CPC title

• Y02P20/143

  the feedstock being recycled material, e.g. plastics · CPC title

• C08J2367/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) · CPC title