Weyerhaeuser. has filed a patent for bleached polycrylic acid crosslinked cellulose fibers with reduced furfural content, resulting in decreased malodor. The method involves treating fibers with hydrogen peroxide post-curing, achieving a furfural content below 1.3 ppm. The reduction in furfural content improves with aging. GlobalData’s report on Weyerhaeuser gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Weyerhaeuser, Artificial concrete aggregates was a key innovation area identified from patents. Weyerhaeuser's grant share as of January 2024 was 58%. Grant share is based on the ratio of number of grants to total number of patents.
The patent application (Publication Number: US20230383461A1) describes a method for reducing the furfural content in polyacrylic acid crosslinked cellulosic fibers. The method involves treating the fibers with hydrogen peroxide, without the use of sodium hydroxide, in a bleaching stage following a curing stage. The treatment is done at a specific pH range and results in a significant reduction in furfural content over time, with values decreasing from one day to 12, 14, or 21 days post-treatment.
Furthermore, the method includes specific parameters for the application of hydrogen peroxide, such as the amount applied per ADMT fiber and the method of application. The reduction in furfural content is substantial, with claims stating reductions of at least 25% and up to 55% at day 12 compared to untreated fibers. The treated fibers can be incorporated into various absorbent articles like diapers, wipes, and tissues, providing odor reduction benefits due to the decreased furfural content. Overall, the method offers a practical solution for improving the quality of polyacrylic acid crosslinked cellulosic fibers by reducing furfural content effectively and efficiently.
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