Manufacturing method of anisotropic conductive foam sheet by roll to roll process for electromagnetic interferenceEMI shielding gasket with silver mirror layer by spray coating and anisotropic conductive foam sheet for EMI shielding gasket manufatured by the same1

摘要

The present invention provides an unwinding unit 20 for continuously supplying a substrate, an anisotropic conductive foam sheet manufacturing unit 10 for manufacturing an anisotropic conductive foam sheet for an electromagnetic wave shielding gasket using the substrate supplied from the unwinding unit 10, and the In the roll-to-roll manufacturing method of an anisotropic conductive foam sheet for an electromagnetic wave shielding gasket using a roll-to-roll manufacturing apparatus (1) including a rewinding unit (30) for winding and recovering a base material on which the anisotropic conductive foam sheet production is completed, The roll-to-roll manufacturing method of the anisotropic conductive foam sheet for the electromagnetic wave shielding gasket is formed by casting a polyurethane foam mixture in the form of foam on one or both sides of a substrate and then curing and laminating an integrated polyurethane foam layer. Step (S1), the UV-curable urethane resin layer forming step (S2) of laminating and curing the UV-curable urethane resin layer on the surface of the formed polyurethane foaming layer (S2), the base material, the polyurethane foaming layer and the UV-curable urethane resin layer , to form a plurality of fine through-holes at regular intervals, or when a removable tape is laminated on the other side of the air-permeable substrate, micro-pores are formed by removing the removable tape After the through-hole forming step (S3), a metal salt aqueous solution is spray-coated on one or both sides of the substrate in which the micropores are formed, the polyurethane foam layer, and the UV-curable urethane resin layer, the surface catalysis step of washing with water (S4) and the surface catalyst After spray coating a silver mirror solution containing silver nitrate, ammonia, alkali metal hydroxide and water, and a reducing solution containing a reducing organic compound and water, respectively, on the finished surface, washing with water and drying the silver film forming step (S5) Including a spray-coated silver film, the electrical conductivity is uniform and the surface resistance and vertical resistance are low, the electromagnetic wave shielding performance is excellent, the shock absorption, the restoring force, the surface condition and adhesion to the adherend are good, and it is very thin. It relates to a roll-to-roll manufacturing method of an anisotropic conductive foam sheet for an electromagnetic wave shielding gasket including a spray-coated silver film capable of realizing a flexible and soft touch, and an anisotropic conductive foam sheet for an electromagnetic wave shielding gasket manufactured therefrom.