Sumitomo Rubber Industries Limited

Spp Technologies Co., Ltd.

Ryosuke Fujii

Masashi Hamakubo

Satoshi Ito

Toshihiro Hayami

A sheet transport roller having a high friction coefficient and a rubber composition for forming a roller main body thereof. The rubber composition of the present disclosure, which is a rubber composition for forming the roller main body of the sheet transport roller, contains a rubber component containing an ethylene-α-olefin copolymer and a rosin component.

Sheet transport roller rubber composition and sheet transport roller

A rubber composition capable of manufacturing a sheet transport roller having an excellent friction coefficient and wear resistance. A sheet transport roller rubber composition contains an ethylene-α-olefin-diene copolymer as a base rubber, a sulfur-based crosslinking agent, and a coumarone-indene resin. It is preferable that the sheet transport roller rubber composition be obtained by mixing the base rubber and the coumarone-indene resin at a temperature equal to or higher than a softening point of the coumarone-indene resin to prepare a mixture, and then mixing this mixture with a sulfur-based crosslinking agent.

A plasma control apparatus includes a power source unit, a resonance producing unit, and a voltmeter. The resonance producing unit includes an LC circuit formed by a coil Land a capacitor Cconnected to each other, and a sensor Sconfigured to detect a phase difference between current flowing in and voltage applied to the LC circuit, and the capacitor Cof the LC circuit has a capacitance larger than an expected capacitance of the plasma P. The power source unitconfigured to control the magnitude of radio-frequency power to be supplied in such a manner as to bring the voltage measured with the voltmeterclose to a set voltage as a target, and controls the frequency of the radio-frequency power to be supplied in such a manner as to minimize the phase difference detected with the sensor S

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Hyogo, Japan

Ryosuke Fujii