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1. (WO2018221440) ENTRY SHEET FOR FINE PORE DRILLING, AND DRILLING METHOD USING SAME

Pub. No.:    WO/2018/221440    International Application No.:    PCT/JP2018/020300
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue May 29 01:59:59 CEST 2018
IPC: B26F 1/16
B23B 49/00
C10M 105/14
C10M 105/40
C10M 107/34
C10M 145/10
C10M 145/28
C10M 145/30
C10M 145/40
C10M 149/10
H05K 3/00
H05K 3/46
C10N 20/04
C10N 30/00
C10N 40/22
Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC.
三菱瓦斯化学株式会社
Inventors: KAMEI, Takayuki
亀井 孝幸
MATSUYAMA, Yousuke
松山 洋介
ISHIKURA, Kenji
石蔵 賢二
Title: ENTRY SHEET FOR FINE PORE DRILLING, AND DRILLING METHOD USING SAME
Abstract:
Provided is an entry sheet for drilling a fine pore having a diameter of not more than 0.075 mm, the sheet having a metallic foil and a resin composition layer which is formed on at least one surface of the metallic foil and which comprises a polyolefin resin (A), a low-molecular water-soluble lubricant (B), and a water-soluble resin (C), wherein: the water-soluble resin (C) contains a high-molecular weight water-soluble resin (c-1) and an intermediate-molecular weight water-soluble resin (c-2); and, with respect to 100 parts by mass of the polyolefin resin (A), low-molecular water-soluble lubricant (B), and water-soluble resin (C) combined, the contained amount of the polyolefin resin (A) is 15-25 parts by mass, the contained amount of the low-molecular water-soluble lubricant (B) is 5-40 parts by mass, and the contained amount of the water-soluble resin (C) is 35-80 parts by mass.