Entry sheet for drilling
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsTakayuki Kamei, Yousuke Matsuyama, Takuya Hasaki
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Abstract
The present invention provides an entry sheet for drilling excellent in hole position accuracy compared with the conventional entry sheet for drilling. Such an entry sheet for drilling is an entry sheet for drilling comprising metallic support foil and a layer comprising a resin composition formed on at least one surface of the metallic support foil, in which the resin composition contains a resin and 70 parts by mass to 130 parts by mass of molybdenum disulfide based on 100 parts by mass of the resin, and the layer comprising the resin composition has a thickness in a range from 0.02 to 0.3 mm.
Claims18
An entry sheet for drilling comprising:
- a first side and a second side opposite of the first side wherein,
- a metallic support foil as an outermost layer on the first side of the entry sheet;
- and
- a layer comprising a resin composition as an outermost layer on the second side of the entry sheet,
- wherein the resin composition comprises a water-soluble resin and 70 parts by mass to 130 parts by mass of molybdenum disulfide as a solid lubricant based on 100 parts by mass of the resin, the water-soluble resin selected from the group consisting of polyethylene oxide, polypropylene oxide, polyalkylene glycol, polyethylene glycol, polypropylene glycol, and combinations thereof, the molybdenum disulfide in the form of solid particles dispersed in the resin composition, and
- the layer comprising the resin composition has a thickness in a range from 0.02 to 0.3 mm.
Dependencies are inferred from the claim text.