Title:
小径孔あけ加工用あて板
Document Type and Number:
Japanese Patent JP4793358
Kind Code:
B2
Abstract:
An entry board for use in drilling small holes in boards: the entry board comprises a lubricant layer of a mixture of a polyethylene glycol having an average molecular weight of at least 3000 to less than 10000, a polyethylene glycol having an average molecular weight of at least 10000 and trimethylolpropane formed over at least one surface of an aluminum base board with an undercoat layer of a partially saponified product of polyvinyl acetate provided between the lubricant layer and the base board. The partially saponified polyvinyl acetate has a degree of saponified 15 to 70 mole % and has an average molecular weight of 9000 to 50000. The adhesion of the lubricant layer to the base board is excellent, and the lubricant layer prevents cracking.
Inventors:
Shingo Kaburagi
Nokazu Uda
Susumu Takada
Kawai Hideo
Nokazu Uda
Susumu Takada
Kawai Hideo
Application Number:
JP2007243603A
Publication Date:
October 12, 2011
Filing Date:
September 20, 2007
Export Citation:
Assignee:
Daichi Chemical Industry Co., Ltd.
Showa Denko Packaging Co., Ltd.
Showa Denko Packaging Co., Ltd.
International Classes:
B23B49/00; B26F1/16; B23B35/00; B23B41/00; C10M105/14; C10M107/26; C10M107/34; C10M107/38; H05K3/00; C10N20/04; C10N40/22
Domestic Patent References:
| JP7308896A | ||||
| JP1171710A | ||||
| JP10335780A | ||||
| JP6504956A | ||||
| JP2001047307A |
Attorney, Agent or Firm:
Norihiko Hibi
Einosuke Kishimoto
Akira Watanabe
Matsumura Naoto
Einosuke Kishimoto
Akira Watanabe
Matsumura Naoto