Hokuetsu has patented a process for manufacturing porous bodies using cellulose-based nanofibers. The method involves attaching nanofibers to a porous support, removing excess liquid, and drying to form a net-like structure. The innovative process utilizes hydrophilic support and specific drying techniques for efficient production. GlobalData’s report on Hokuetsu 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 Hokuetsu, H2 storage carbon nanotubes was a key innovation area identified from patents. Hokuetsu's grant share as of May 2024 was 27%. Grant share is based on the ratio of number of grants to total number of patents.
Manufacturing porous body using cellulose-based nanofibers
A recently granted patent (Publication Number: US11969695B2) discloses a process for manufacturing a porous body using cellulose-based nanofibers. The process involves preparing an aqueous dispersion liquid of nanofibers with an average fiber diameter of 1 to 4 nm, attaching it to a hydrophilic porous support, and subsequently drying the support to remove the water dispersion medium. The nanofibers in the dispersion liquid are entangled to form net-like structural bodies within the pores of the support. The drying process can be achieved through forced drying by heat or natural drying by ambient air.
Furthermore, the patent claims specify various aspects of the manufacturing process, including the concentration of cellulose-based nanofibers in the dispersion liquid, the presence of a surfactant in the liquid, and the use of a cationic surfactant. The raw materials for the nanofibers are derived from various sources such as wood pulp, waste paper pulp, and non-wood pulp. The porous support can be made from a variety of materials like inorganic fiber sheets, metal fiber sheets, and porous ceramics. Additionally, the patent details different methods for removing the aqueous dispersion liquid, such as squeezing with a roll dehydrator or using water-absorbing materials. The attaching process can be carried out through impregnation, application, or spraying methods, and the porous support is characterized by an average fine pore diameter ranging from 0.1 to 20 µm.
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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.
