MUMBAI, India, July 31 -- Intellectual Property India has published a patent application (202647088323 A) filed by Toray Industries, Inc. on July 20, 2026, for Filter Medium For Air Filter, Manufacturing Method For Same, And Air Filter Unit Using Same.
Inventors include Nakamura Ayu; Hamada Tsuyoshi; and Aiba Ryota.
The application for the patent was published on July 24, 2026, under issue no. 30/2026.
Abstract: [Problem] To provide a high performance filter medium that combines high initial collection efficiency resulting from electret melt blowing with efficiency retention of nanofibers after discharge and ameliorating the problem that dust holding capacity and tobacco durability of nanofibers are low. [Solution] This filter medium for an air filter has at least a first layer, a second layer, and a third layer in this order from the upstream side. The second layer is an electret melt-blown nonwoven fabric, the third layer is a nanofiber layer having an average fiber diameter of 10-1000 nm, and the basis weight of the third layer is 0.1 g/m2 or more.
Disclaimer: Curated by HT Syndication.
