Stora Enso had 15 patents in advanced materials during Q4 2023. Stora Enso Oyj filed patents in Q4 2023 for air-laid blanks with natural fibers and polymer binders, featuring different fiber orientation distributions for sound absorbing articles. Another patent involves a method for manufacturing web or film with highly refined cellulose fibers using membrane assisted dewatering. Additionally, a patent was filed for air-laid blanks with natural fibers and thermoplastic polymer binders, allowing for variations in density through modification of air-permeability during production. GlobalData’s report on Stora Enso gives a 360-degreee view of the company including its patenting strategy. Buy the report here.

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Stora Enso grant share with advanced materials as a theme is 20% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.

Recent Patents

Application: Air-laid blank for sound absorbing or damping, and methods and appartuses for producing such (Patent ID: US20230416958A1)

The patent filed by Stora Enso Oyj describes an air-laid blank made of natural fibers and a polymer binder, with multiple portions having a different fiber orientation distribution compared to the rest of the blank. This unique structure allows for the production of sound-absorbing or damping articles. The invention also includes methods and apparatuses for producing such air-laid blanks, involving the introduction of fibers and a thermoplastic polymer binder into a forming head, capturing the fibers and binder on a collector, applying gas pulses to induce local distortions in fiber orientations, and heat treating the material to form the air-laid blank.

The air-laid blank's design with varying fiber orientation distributions in different portions provides enhanced sound absorption and damping properties. The method of production involves precise steps such as applying gas pulses to induce fiber orientation changes and heat treating to melt the polymer binder, resulting in a unique structure. The use of natural fibers and specific polymer binders in the air-laid blank contributes to its effectiveness in sound absorption applications. Additionally, the patent covers the production of sound-absorbing or damping articles using the described air-laid blank, highlighting its practical applications in various industries.

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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.