Keyboard
AssigneeKawai Musical Instrument Manufacturing Co., Ltd.
InventorsMuneo Ishida, Mithuo Yamashita, Masanari Onishi, Masahiro Tanaka
Life of this patent
Estimating the term…
Abstract
A keyboard for a musical instrument is composed of a resin composition, having a durometer hardness of 82 or larger, and the composition comprises a cellulose derivative resin and a silica having 3.0 or less silanol groups in the area of 100 square angstrom and a BET specific surface area of 10 to 210 m.sup.2 /g. It may comprises a substrate and the keyboard.
Claims7
A keyboard composed of a resin composition, having a durometer hardness of 82 or larger, which comprises a cellulose derivative resin and a silica having 3.0 or less silanol groups in the area of 100 square angstrom and a BET specific surface area of 10 to 210 m.sup.2 /g.
Dependencies are inferred from the claim text.