Abstract: Discussed is a battery that may include at least one battery module including at least one battery cell, a case tray configured to support the at least one battery module, a case cover coupled with the case tray to cover the at least one battery module, a sealing gasket disposed between the case tray and the case cover to prevent penetration of moisture or foreign substance into the at least one battery module, and a reinforcing unit provided to the case cover to be disposed adjacent to the sealing gasket and configured to prevent twisting of the case cover when the case tray and the case cover are coupled.

Abstract: Discussed is a battery pack that may include at least one battery module including at least one battery cell; a case tray configured to support the at least one battery module; a tray cover coupled to the case tray; and at least one bushing gasket configured to connect the case tray and the tray cover and to support the case tray on a plurality of points.

Abstract: Proposed is a composite film including a first film layer attached to an upper surface of a steel member, a second film layer positioned on the first film layer, and a mesh film layer positioned on the second film layer and having a mesh structure. A portion of the mesh film layer is embedded into the second film layer during a heat compression process when the composite film is manufactured. The composite film improves the water resistance, chemical resistance, abrasion resistance, and durability of a steel member when the steel member is coated with the composite film.

Abstract: Proposed is a composite film including a first film layer attached to an upper surface of a steel member, a second film layer positioned on the first film layer, and a mesh film layer positioned on the second film layer and having a mesh structure. A portion of the mesh film layer is embedded into the second film layer during a heat compression process when the composite film is manufactured. The composite film improves the water resistance, chemical resistance, abrasion resistance, and durability of a steel member when the steel member is coated with the composite film.

Abstract: An apparatus for manufacturing a laminated steel sheet by treating surfaces of a base steel sheet so that the adhesive strength between a base steel sheet and lamination sheets is increased. The apparatus comprises an uncoiler for unwinding a coiled base steel sheet followed by a cleaner for cleaning the surfaces of the base steel sheet. The cleaner comprises an acid pickling unit for pickling the surfaces of a hot rolled steel sheet with acid pickling water when the base steel sheet is the hot rolled steel sheet, an alkali cleaning unit for cleaning the surfaces of a galvanized steel sheet with alkali cleaning water when the base steel sheet is the galvanized steel sheet, and a rinsing unit. The acid pickling unit and the alkali cleaning unit are selectively used on the basis of kinds of the base steel sheet supplied from the uncoiler.

Abstract: Disclosed are a functional high-strength adhesive sheet using a nonwoven fabric, which is widely applied, a system and a method for manufacturing the adhesive sheet, and a functional high-strength steel plate attached with the adhesive sheet. The functional high-strength adhesive sheet comprises a polyethylene layer, a nonwoven fabric in which the polyethylene is pressed to its one surface, and a functional polyethylene layer pressed to the other surface of the nonwoven fabric.

Abstract: Disclosed herein is an apparatus for manufacturing a laminated steel sheet which is capable of optimally treating surfaces of a base steel sheet so that the adhesive strength between a base steel sheet and lamination sheets attached to the surfaces of the base steel sheet is increased. The apparatus comprises an uncoiler for unwinding a coiled base steel sheet and supplying the uncoiled base steel sheet, followed by a cleaner for cleaning the surfaces of the base steel sheet. The cleaner comprises an acid pickling unit for pickling the surfaces of a hot rolled steel sheet with acid pickling water when the base steel sheet is the hot rolled steel sheet, an alkali cleaning unit for cleaning the surfaces of a galvanized steel sheet with alkali cleaning water when the base steel sheet is the galvanized steel sheet, and a rinsing unit for rinsing the base steel sheet with rinsing water.