Hirokazu Yokoya

Laser heat sealing of the polymer coated steel sheet

The polymer coated thin steel sheet is widely used for materials requiring the heavy corrosion resistance. The surface of this material has strong corrosion resistance, however, the edge or joint section should be sufficiently sealed off against the environment to prevent rusting. The tight rolling of the sheet edge is one of the sealing techniques. In this study, we applied the laser heat welding of polymer in order to enhance the sealing performance. The influence of processing parameters such as the laser wavelength, energy density was examined using the PET film coated (Ni plated) steel sheet. By optimizing the laser parameters, rusting in the roll joint was successfully prevented in accelerated corrosion test.The polymer coated thin steel sheet is widely used for materials requiring the heavy corrosion resistance. The surface of this material has strong corrosion resistance, however, the edge or joint section should be sufficiently sealed off against the environment to prevent rusting. The tight rolling of the sheet edge is one of the sealing techniques. In this study, we applied the laser heat welding of polymer in order to enhance the sealing performance. The influence of processing parameters such as the laser wavelength, energy density was examined using the PET film coated (Ni plated) steel sheet. By optimizing the laser parameters, rusting in the roll joint was successfully prevented in accelerated corrosion test.