Entry sheet for drilling and method for drilling processing using same

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United States of America Patent

PATENT NO 11383307
APP PUB NO 20180257148A1
SERIAL NO

15756899

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An entry sheet for drilling comprising: a metallic foil; and a layer of a resin composition on at least one surface of the metallic foil, the resin composition comprising a polyolefin resin (A) and a water-soluble resin (B), wherein a content of the polyolefin resin (A) is 25 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the total of the polyolefin resin (A) and the water-soluble resin (B), a content of the water-soluble resin (B) is 50 parts by mass or more and 75 parts by mass or less based on 100 parts by mass of the total of the polyolefin resin (A) and the water-soluble resin (B), and the water-soluble resin (B) comprises a high-molecular-weight water-soluble resin (B-1) having a weight average molecular weight of 2×105 or higher and 1.5×106 or lower.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI GAS CHEMICAL COMPANY INCMITSUBISHI BUILDING 5-2 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8324

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kamei, Takayuki Yonezawa, JP 18 323
Matsuyama, Yousuke Yonezawa, JP 18 61
Ogashiwa, Takaaki Yonezawa, JP 32 83

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