SPINNER CHUCK

PROBLEM TO BE SOLVED: To stably control the dispersion of the surface resistance value of a molded item, by expressing polyether aromatic ketone by specified formula, making a carbon fiber have a specified diameter and a specified length, and moreover, controlling the surface resistance value of a s...

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Bibliographische Detailangaben
Hauptverfasser:	SATO TAKASHI, YANAGIHARA KAYAKO, YOSHIMURA MASAJI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS SEMICONDUCTOR DEVICES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To stably control the dispersion of the surface resistance value of a molded item, by expressing polyether aromatic ketone by specified formula, making a carbon fiber have a specified diameter and a specified length, and moreover, controlling the surface resistance value of a spinner chuck narrowly in a specified range. SOLUTION: A spinner chuck contains polyether aromatic ketone by 90-60 wt.% and carbon fiber by 10-40 wt.%. The polyether aromatic ketone has repeat units represented by the formula. The carbon fiber is 3-25 μm in average diameter, and is 50-70,000 μm in average length. Additionally, a surface resistance value R of the spinner chuck is such that Rmin