Unicharm patented a method to produce conifer-derived pulp fibers for paper by beating material pulp fibers in water and treating them with ozone water. The process involves deriving fibers from absorbent articles, beating them, and ozone treatment. GlobalData’s report on Unicharm 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 Unicharm, Incontinence monitoring sensors was a key innovation area identified from patents. Unicharm's grant share as of January 2024 was 53%. Grant share is based on the ratio of number of grants to total number of patents.
Method of producing conifer-derived pulp fibers for paper
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A recently granted patent (Publication Number: US11879210B2) discloses a method for producing conifer-derived pulp fibers for paper from used absorbent articles. The process involves deriving the pulp fibers, beating them in the presence of water to form beaten material pulp fibers, and treating them with ozone water to create pulp fibers suitable for paper production. The method includes specific steps such as using an acidic aqueous solution during the beating process and maintaining the fibers in this solution during transfer to the ozone treatment step.
Furthermore, the patent outlines parameters for the ozone treatment step, specifying an ozone concentration of 1 to 200 ppm by mass, a treatment time of 5 to 120 minutes, and a product of concentration and time ranging from 100 to 6000 ppm minute. The resulting pulp fibers are expected to have a length-weighted average fiber length of 1.6 to 2.1 mm and a Canadian standard freeness of 500 CSF ml or more. This innovative method offers a sustainable approach to paper production by utilizing conifer-derived pulp fibers from used absorbent articles, potentially reducing waste and environmental impact in the paper manufacturing industry.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
