METHOD FOR DISCOLORATION PREVENTION

摘要

A discoloration preventive method provides a functional exterior material manufacturing method having a discoloration prevention effect. A discoloration preventive method comprises as follows. An ion injection layer(2) is formed by irradiating ion beam on the exterior surface(1) to prevent discoloration. The discoloration prevention container manufacturing method is as follows. The container is manufactured by injection molding of polymer resin. An ion injection layer is formed by irradiating ion beam on the exterior surface of the injection molded container to prevent discoloration. The discoloration preventive film manufacturing method is as follows. The polymer resin is extruded so film is manufactured. An ion injection layer is formed by irradiating ion beam on the exterior surface of the extruded film to prevent discoloration.