| 摘要 |
The keypad is made of a) a formed plastic shell; b) graphics and background printed on the interior surface of the formed plastic shell; and c) a plastic filling the hollow cavity or cavities of the formed plastic shell. The formed plastic shell of the keypad is a polycarbonate and the plastic filling the hollow cavities is a thermoplastic resin or an elastomer. Additionally, the background printed on the interior surface of the formed plastic shell is made with a flexible ink and the keypad has a wear resistance test score in a Norman tester of greater than 40 cycles before the ink on the keypad fails on abrasion testing.
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