Showa Denko Kabushiki Kaisha

Yutaka Matsuzaki

Fumio Kagawa

Shin'ichi Horie

A glass-grinding sheet is prepared by a process wherein 100 wt. parts of a powdery metal composition consisting of, based on the weight of the composition, 80-96.8% copper, 3-15% of tin and/or zinc, and 0.2-5% of nickel and/or titanium, are mixed with 0.5-30 wt. parts of a diamond powder; the mixture is sintered; and then, the obtained sintered body is rolled into a sheet of the desired thickness. The powdery metal composition is either a copper alloy consisting of (a) copper, (b) tin and/or zinc and (c) nickel and/or titanium, or a mixture of a copper alloy consisting of (a) copper and (b) tin and/or zinc, with (c) nickel and/or titanium.

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Chichibu, Japan

Yutaka Matsuzaki