Abstract: A USB-compliant keyboard device is provided that is capable of preventing malfunctions, operation failure and the like due to static noise by a simple method. The keyboard device has a keyboard main body with a large number of key tops on its upper surface, an upper case and a lower case accommodating the keyboard main body, a control circuit board on which a control circuit to control the keyboard main body is mounted, and USB connectors connected to the control circuit board. Further, a shield plate covering the control circuit board from a lower position is provided. The shield plate is electrically connected to frame ground members of the USB connectors and a shield line of a cable connected to a personal computer main body.

Abstract: A modified polypropylene has a melt flow rate of 0.1 to 10 g/10 min, a melt tension of 3 to 20 g and a gel fraction, as determined by boiling paraxylene extraction, of 0.01 to 25% by weight. The modified polypropylene, a process for preparing the modified polypropylene, and a modified polypropylene composition containing the modified polypropylene are capable of producing a foamed product having excellent foam properties and food hygienic qualities. The foamed product obtained from the modified polypropylene or the modified polypropylene composition is lightweight, highly rigid and excellent in chemical resistance and food hygienic qualities, and hence it can be used for food packaging containers and trays, particularly containers of noodles or ice cream and trays of fish or meat, for which polystyrene has been heretofore used.