To provide a frame-less sunglass lens emphasizing fashionability.
The dyed lens capable of being commercialized is obtained by a method of uniformly dyeing the whole surface or a method of gradation-dyeing using an urethane lens for sunglasses cleaned by a cleaning method of cleaning without damaging the surface of the lens to completely remove the known additives (mainly an internal release agent) such as the internal release agent, a plasticizer, a defoaming agent, a leveling agent, a matting agent, a flame retardant, a thickener, a lubricant, an anti-static agent, a surfactant, a reaction retardant, a dehydrating agent, an antioxidant, an ultraviolet absorber, a hydrolysis inhibitor, and a weathering stabilizer, all being present in the urethan itself and on the surface after demolded.
COPYRIGHT: (C)2011,JPO&INPIT
TORASAWA KENJI
TAKEHARA HISAYASU
