| abstract |
Provided is an entry sheet for drill hole formation which is superior in accuracy of hole position, suppresses drill bit breakage, and is less adhered to a drill bit than a conventional entry sheet for drill hole formation. Such a drill hole entry sheet is a drill hole formation entry sheet comprising a metal support foil and a layer made of a resin composition formed on at least one side of the metal support foil, And the water-soluble resin (B), wherein the cellulose derivative (A) is composed of a hydroxyalkyl cellulose and / or a carboxyalkyl cellulose having a weight average molecular weight of 20,000 to 350,000, and with respect to 100 parts by mass of the resin composition, The content of the cellulose derivative (A) is 5 to 40 parts by mass, and the content of the water-soluble resin (B) is 60 to 95 parts by mass. |