COMPOSITIONS OF RECYCLED POLYETHYLENE TEREPHTHALATE, FIBERS AND ARTICLES PRODUCED THEREOF, AND METHODS FOR PRODUCING THEM

MX435270BActive Publication Date: 2026-06-12SHAW IND GROUP INC

Patent Information

Authority / Receiving Office: MX · MX
Patent Type: Patents
Current Assignee / Owner: SHAW IND GROUP INC
Filing Date: 2009-09-30
Publication Date: 2026-06-12

AI Technical Summary

Technical Problem

Conventional recycling processes for consumer polyethylene terephthalate (PET) do not produce satisfactory materials for extrusion into fibers, particularly bulky continuous filament (BCF), leading to issues such as unsatisfactory graining and breakdown during processing.

Method used

A method involving the use of up to 100% consumer PET collected from curb deposits, combined with virgin PET, and processed through homogenization, crystallization, drying, and extrusion to create homogeneous recycled PET compositions suitable for fibers and BCF.

Benefits of technology

The method produces fibers with improved consistency and reduced variability, enhancing properties like color uniformity and mechanical strength, suitable for applications like carpets, while maintaining performance comparable to virgin PET.

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Abstract

In one aspect, the invention relates to compositions of recycled polyethylene terephthalate, fibers and articles produced therefrom, and methods for producing them. In a further aspect, the invention relates to homogenized polyethylene terephthalate derived from consumer products. In a further aspect, the invention relates to extruded polymer compositions, polymer blends, fibers, and / or bulky continuous filament fibers comprising polyethylene terephthalate derived from consumer products. In a further aspect, the invention relates to processes for preparing compositions of recycled polyethylene terephthalate.

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