SURFACE TREATED STEEL SHEET FOR DI CAN HAVING EXCELLENT ADAPTABILITY AS PRINTING SUBSTRATE

摘要

PURPOSE:To obtain the surface treated steel sheet having the excellent adaptability to a printing substrate and high merchandise value by forming the surface treated steel sheet for DI cans which has graphite fluoride particles on the Sn plating layer on at least one layer of the steel sheet and has the excellent adaptability to the printing substrate. CONSTITUTION:After the steel sheet is subjected to degreasing and pickling, the steel sheet is subjected to the Sn plating of a prescribed thickness in an acidic Sn plating bath and is subjected to a treatment for coating with the graphite fluoride particles after washing. The Sn plated steel sheet mentioned above is immersed into an aq. soln. of various low temp. dispersed with the graphite fluoride particles of prescribed grain sizes and is dried by hot air after squeezing with rolls. The graphite fluoride particles are sized 0.01 to 10g/mm<2>. Further, the diameter of graphite fluoride particles is in a range of 0.1 to 10mum. As a result, the surface treated steel sheet for production of the DI cans which has the excellent adaptability to the printing substrate after DI working and has the high merchandise value is provided.