MUMBAI, India, July 7 -- Intellectual Property India has published a patent application (202617069566 A) filed by Mitsui Chemicals, Inc. on June 03, 2026, for Optical Member And Method For Manufacturing Optical Member.
Inventors include Kasori Yuuki; Kadowaki Shinichiro; and Togo Norihiro.
The application for the patent was published on July 03, 2026, under issue no. 27/2026.
Abstract: Disclosed is an optical member (100) which comprises: a sulfur atom-containing resin base material (11); and a photochromic layer (21) that is superposed on a surface of the sulfur atom-containing resin base material (11). In order to improve adhesion between layers, the maximum point stress measured by the following procedure x is 138 N/mm2 to 177 N/mm2 inclusive. Procedure x: the optical member (100) is subjected to a three-point bending test that is performed at 25°C in accordance with JIS K7171, and the maximum point stress (N/mm2) is measured at the time when the test is performed under a condition that the distance between supporting points is 34 mm, the speed is 10 mm/minute, and the radius R2 of the support base is 2 mm.
Disclaimer: Curated by HT Syndication.
