IMPROVED LOW-EMISSIVITY WINDOW FILM AND PROCESS FOR PRODUCING SUCH A FILM

摘要

PURPOSE: An improved low-emissivity window film and a method for manufacturing the film is provided to have emissivity about 0.27~0.33, and have visible light transmittance about at least 17%. CONSTITUTION: An improved low-emissivity window film includes a polymer substrate(12), a metal-adhesion promoting layer, a reflective metal layer(14), a polycarbonate coating. The polymer substrate has a first surface and a second surface of opposite side. The metal-adhesion promoting layer is arranged on a first surface. The reflective metal layer is arranged on metal-adhesion promoting layer. The polycarbonate coating is arranged on a metal layer and is comprised transparently. The film for a window has emissivity about 0.27~0.33, and have visible light transmittance about at least 17%.