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Home > News > Chemicals

INVISTA granted patent for nylon 6,6 recycling process

Source：Adsale Plastics Network Date ：2025-02-14 Editor ：VC

Copyright： This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

INVISTA was granted a patent for a nylon recycling process that could improve nylon 6,6 manufacturing by making more high-quality post-industrial recycled (PIR) feedstock available.

The patent family, which was granted in the U.S., China and Europe last fall, covers a method to recycle high relative viscosity (RV) nylon. This process enables the broader use of mechanically recycled high RV nylon 6,6 feedstock, which historically has been unsuitable in key downstream applications.

The manufacturer of chemical intermediates, polymers and fibers for the nylon and polypropylene value chains has also submitted a second patent application for a process that enables the use of up to 100% post-consumer recycled (PCR) content in the production of new nylon 6,6 components.

The patent application describes an ammonolysis process to convert a nylon 6,6 or nylon 6 blended post-consumer recycle feed stream back to hexamethylene diamine and caprolactam, the monomers required for making nylon 6,6 and nylon 6.

While early in development, this chemical recycling technology is predicted to have high yields and produce monomers with virgin-equivalent properties based on initial R&D test results with virgin-equivalent properties.

INVISTA is also supporting external parties that are working on their own solutions for nylon 6,6 depolymerization, as well as actively seeking collaborations with other companies.

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Source：Adsale Plastics Network Date ：2025-02-14 Editor ：VC

INVISTA was granted a patent for a nylon recycling process that could improve nylon 6,6 manufacturing by making more high-quality post-industrial recycled (PIR) feedstock available.

INVISTA is also supporting external parties that are working on their own solutions for nylon 6,6 depolymerization, as well as actively seeking collaborations with other companies.