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

Patent metadata

Field	Value
Publication number	US-10920071-B2
Application number	US-201816195078-A
Country	US
Kind code	B2
Filing date	Nov 19, 2018
Priority date	Sep 30, 2008
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

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, or homogenized curbside post-industrial polyethylene terephthalate, or a homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate, and balance virgin polyethylene terephthalate, wherein the homogenized curbside polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate comprises at least one impurity not present in virgin polyethylene terephthalate.

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

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

4. A polymer mixture 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, or homogenized curbside post-industrial polyethylene terephthalate, or a homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate, and balance virgin polyethylene terephthalate, wherein the homogenized curbside polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate comprises at least one impurity not present in virgin polyethylene terephthalate.

5. The polymer mixture of claim 4 , wherein the polyethylene terephthalate polymer composition has at least about 25% by weight of homogenized curbside post-consumer polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate.

6. The polymer mixture of claim 4 , wherein the polyethylene terephthalate polymer composition has at least about 50% by weight of homogenized curbside post-consumer polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate.

7. A carpet comprising a fiber 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, or homogenized curbside post-industrial polyethylene terephthalate, or a homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate, and balance virgin polyethylene terephthalate, wherein the homogenized curbside polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate comprises at least one impurity not present in virgin polyethylene terephthalate.

8. The carpet of claim 7 , wherein the polyethylene terephthalate polymer composition has at least about 25% by weight of homogenized curbside post-consumer polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate.

9. The carpet of claim 7 , wherein the polyethylene terephthalate polymer composition has at least about 50% by weight of homogenized curbside post-consumer polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial polyethylene terephthalate.

10. The carpet of claim 7 , 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. The carpet of claim 7 , wherein the homogenized curbside polyethylene terephthalate, or homogenized curbside post-industrial polyethylene terephthalate, or the homogenized blend of curbside post-consumer and post-industrial 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.

12. The extruded polymer composition of claim 1 , 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.

13. The polymer mixture 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.

14. A fiber comprising the extruded polymer composition of claim 1 .

15. The fiber of claim 14 , wherein the fiber is a bulk continuous filament (BCF).

16. The fiber of claim 14 , wherein the at least one impurity comprises floatable contamination in an amount less than 15 ppm, PVC contamination in an amount less than 50 ppm, or a combination thereof.

17. A fiber comprising the polymer mixture of claim 4 .

18. The fiber of claim 17 , wherein the fiber is a bulk continuous filament (BCF).

19. The fiber of claim 17 , wherein the at least one impurity comprises floatable contamination in an amount less than 15 ppm, PVC contamination in an amount less than 50 ppm, or a combination thereof.

Assignees

• Columbia Insurance Co

Inventors

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

Classifications

• Y02W30/62

  Plastics recycling; Rubber recycling · CPC title

• Y02P20/143

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

• Y10T428/1366

  Textile, fabric, cloth, or pile is sandwiched between two distinct layers of material unlike the textile, fabric, cloth, or pile layer · CPC title

• C08L2207/20

  Recycled plastic · CPC title

• D01F6/62

  from polyesters · CPC title