Method for preparation of diffusion sheet
View Patent ↗A low cost and simple method for preparation of diffusion sheets comprising the steps of swelling, wetting and dispersing nano-scale clay, toluene, and a dispersant to form a paint. The paint is then coated on a surface of a polymer substrate by a wet coating process to form a diffusion layer which includes the nano-scale clay as diffusion particles.
1. A low cost and simple method for preparation of diffusion sheets comprising the steps of:
mixing a composition essentially consisting of nano-clay particles, toluene and a dispersant to form a diffusion layer paint;
preparing a substrate by coating an acrylic resin on said substrate;
drying said acrylic resin coated on said substrate to form a layered coated substrate;
applying said diffusion layer to at least one surface of said layered coated substrate;
drying and cross-linking said diffusion layer by applying UV light to form said diffusion sheet.
2. The method as claimed in claim 1 , wherein cation exchange capacity of the nano-scale clay ranges from 90 to 150 meq/100 g while aspect ratio of nano-scale clay ranges from 100 to 1000.
3. The method as claimed in claim 1 , wherein the resin includes optical curable acrylic resin.
4. The method as claimed in claim 1 , wherein the wet coating process includes wet roll coating micro-gravure coating, spray coating, dip coating and spin coating.