METHOD OF PRESERVING METALLIC FOIL COMPOSITE SHEET TO BE DRILLED

摘要

PROBLEM TO BE SOLVED: To provide a metallic foil composite sheet to be drilled which is excellent in productivity and workability with reduced occurrence of cracks of a rolled product or warps of a sheetlike product. SOLUTION: The method of preserving the metallic foil composite sheet to be drilled comprises steps of enclosing a water retention agent with water absorbed together with the metallic foil composite sheet comprising a layer with a thickness of 0.02 to 3.0 mm comprising a mixture of 20 to 90 pts.wt. of a polyether ester and 10 to 80 pts.wt. of a water-soluble lubricant formed on one of surfaces of a metallic foil and preserving them in a sealed state.