MUMBAI, India, Jan. 9 -- Intellectual Property India has published a patent application (202511113218 A) filed by Ims Engineering College, Ghaziabad, Uttar Pradesh, on Nov. 18, 2025, for 'biodegradable sanitary napkin comprising polyhydroxybutyrate (phb) and cellulose extracted from microbial and agricultural sources for sustainable menstrual waste management.'
Inventor(s) include Rabab Anjum; Faiza Nasir; Ananya Bhaskar; Ekta; and Tanisha Sharma.
The application for the patent was published on Jan. 9, under issue no. 02/2026.
According to the abstract released by the Intellectual Property India: "A biodegradable sanitary napkin comprising a multi-layered structure including a PHB-coated top layer, an absorbent cellulose core layer, and a PHB-based barrier layer designed for sustainable menstrual waste management. The biodegradable sanitary napkin as claimed in claim 1, wherein the cellulose fibers are extracted from both microbial sources such as Acetobacter xylinum and agricultural waste sources such as rice husk, banana fiber, sugarcane bagasse, or corn stalks. 3. The biodegradable sanitary napkin as claimed in claim 1, wherein the ratio of microbial cellulose to agricultural cellulose in the absorbent core ranges between 40:60 and 60:40 by weight. 4. The biodegradable sanitary napkin as claimed in claim 1, wherein the PHB film forming the bottom barrier layer has a thickness between 10 microns and 50 microns to ensure flexibility and leak resistance. 5. The biodegradable sanitary napkin as claimed in claim 1, wherein the top PHB-coated cellulose layer is hydrophilic, breathable, and resistant to microbial growth while maintaining user comfort. 6. The biodegradable sanitary napkin as claimed in claim 1, wherein biodegradable adhesives derived from natural starch or plant-based polymers are used for bonding and attachment purposes. 7. The biodegradable sanitary napkin as claimed in claim 1, wherein the product and its packaging are fully compostable and decompose within 90 to 120 days under natural or industrial composting conditions. 8. The biodegradable sanitary napkin as claimed in claim 1, wherein the manufacturing process comprises cellulose extraction, PHB synthesis, lamination, sterilization, and compostable packaging to form a hygienic biodegradable product. 9. The biodegradable sanitary napkin as claimed in claim 1, wherein the absorbent core exhibits enhanced liquid retention, uniform dispersion, and rapid absorption compared to conventional non-biodegradable sanitary pads. 10. A biodegradable sanitary napkin substantially as described in the foregoing specification, characterized by its complete biodegradability, high absorbency, comfort, and suitability for sustainable menstrual waste management."
Disclaimer: Curated by HT Syndication.
