POLYMER BLENDS AS RELEASE AGENTS FOR BARE METAL FUSERS IN ELECTROSTATIC COPIERS
Original Publication Date: 1978-Jun-30
Included in the Prior Art Database: 2004-Mar-31
Xerox Disclosure Journal
Toner particles can be fused to a substrate by contacting the toner particles upon the substrate with a heated fuser member bearing a coating of a polymer release material such as low molecular weight linear polymers of ethylene. For example, in U.S. Patent 3,937,637 there is described a fuser roll structure for fusing toner images to a substrate wherein the toner images contact a rigid, thermally conductive core having a high surface energy, such as glass or metal, having a coating of a polymer release material on the core, the polymer release material being the type which oxidizes and is capable of reacting with the core surface material. Branched poly-ethylene is one of the preferred polymer release materials. However, these branched polyethylene release materials are characterized by disadvantages in the fuser system due to their poor thermal oxidative stability. Low molecular weight, linear, non-branched polyethylenes have greatly improved ther-mal oxidative stability when used as fuser release agents. However, these latter polyethylenes give lower hot offset tem- •peratures and, therefore, less fuser temperature control latitude than higher molecular weight, branched polyethylenes.