2results about How to "Improve liquid absorption performance" patented technology

This invention belongs to the field of biomedical materials technology, specifically relating to a chitosan hemostatic sponge and its preparation method. This patent addresses the problems of residual acetic acid and side reactions, low strength, and low absorbency caused by cross-linking methods during the preparation of chitosan hemostatic sponges. It innovatively proposes a method for physically cross-linking chitosan hemostatic sponges using hydrogen bonding-electrostatic synergistic superabsorbency based on alcohol-regulated substances. By introducing alcohols to regulate the electrostatic interaction between chitosan amino groups and acetic acid, while simultaneously adjusting the hydrogen bonding interaction between chitosan molecules, and introducing other polymer materials to construct a semi-interpenetrating network, the overall material properties are enhanced. The chitosan hemostatic material prepared by this process, although without the addition of cross-linking agents, still exhibits an insoluble sponge-like structure, good flexibility, and excellent absorbency and hemostatic effect.

This utility model discloses a fast-absorbing three-dimensional suspended sanitary napkin, relating to the field of sanitary product technology. It includes a bottom film, a lower core, an upper core, and a top layer. The bottom film includes an adhesive portion and wing portions. The lower core is fixed to the adhesive portion. The wing portions are located around the adhesive portion, and their backs are provided with adhesive for attaching to the user's underwear. Arched elastic sheets parallel to the length of the sanitary napkin are fixed to both sides of the top surface of the lower core. The upper core is fixed to the lower core only at both ends. Elastic cords are fixed to the sides of the upper core, with the other end of the elastic cords fixed to the wing portions. The top layer is fixed to the upper core. This three-dimensional suspended sanitary napkin has excellent anti-leakage and absorbency.