MUMBAI, India, Sept. 22 -- Intellectual Property India has published a patent application (202647101901 A) filed by Toray Industries, Inc. on August 24, 2026, for Separation Membrane And Method For Producing Same.
Inventors include Sakurai Yuka; Kato Satoshi; and Kanamori Satoko.
The application for the patent was published on September 18, 2026, under issue no. 38/2026.
Abstract: This separation membrane comprises: a porous resin layer which contains a polymer comprising mainly a poly(vinylidene fluoride)-based resin; and another layer. The porous resin layer is provided to a surface section. The polymer has an a value of 0.40-0.48, with the a value being determined, by approximation using a formula 1, from the radius of rotation S21/2, which is measured using GPC-MALS (gel permeation chromatography using a multi-angle light scattering detector), and the absolute molecular weight Mw of the polymer. The weight average molecular weight of the poly(vinylidene fluoride)-based resin, as measured by GPC (gel permeation chromatography) is 300,000 or more. The porosity attributable to macrovoids is 28-80% in a region at a depth of up to 15 µm from the surface of the porous resin layer. The average pore diameter at the surface of the porous resin layer is 10-100 nm. (Formula 1): S21/2=bMwa.
Disclaimer: Curated by HT Syndication.
