Patent ID: 7445683

Claim:
A lamination process comprising the step of: (A) providing a first layer of an about 30 mils to about 120 mils interlayer sheet of a resin composition consisting essentially (a) an ethylene acid copolymer resin having from about 17 to about 30 wt % of carboxylic acid monomer units from acids selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid, monomethyl maleic acid, and mixtures thereof, wherein at about 1% to about 100% of the acid groups of the copolymer are neutralized to carboxylic acid salts comprising carboxylate ions and metal counter-ions, and wherein the metal counter-ions consist essentially of zinc ions; and (b) at least one additive selected from the group consisting of plasticizers, processing aides, flow enhancing additives, lubricants, pigments, dyes, flame retardants, impact modifiers, nucleating agents to increase crystallinity, antiblocking agents such as silica, thermal stabilizers, UV absorbers, UV stabilizers, dispersants, surfactants, chelating agents, coupling agents, adhesives, primers and optical brighteners; (B) providing a second layer of a sheet comprising glass or other rigid structural material; and (C) laminating the first layer to the second layer at atmospheric pressure at a temperature of less than 120° C.