Conductive elastomer material, and conductive sheet and conductive seamless belt each made of the material
AssigneeSumitomo Rubber Industries, Ltd.
InventorAkira Minagoshi
Life of this patent
Estimating the term…
Abstract
Disclosed is a conductive elastomer material from which a molded material having good conductivity and excellent bending resistance can be obtained. This conductive elastomer material is capable of reducing variations in in-plane electrical resistively of sheet-like molded articles. Specifically disclosed is a conductive elastomer material which is characterized by being obtained by dispersing carbon nanotubes into a base component which is composed only of a thermoplastic elastomer. The conductive elastomer material is also characterized in that the carbon nanotubes have a diameter of 30-300 nm and an aspect ratio of 10-1000, and 0.01-10 parts by mass of the carbon nanotubes are blended per 100 parts by mass of the base component.
Claims3
1-6. (canceled)
A conductive seamless belt formed by extruding a conductive elastomer material as a sheet,
- wherein in said conductive elastomer material, carbon nanotubes are dispersed in a base component consisting of a polyester thermoplastic elastomer;
- said carbon nanotubes have diameters of 50 to 100 nm and an aspect ratio of 20 to 40;
- and said carbon nanotubes are added to said base component at a ratio of 0.5 to 5 parts by mass for 100 parts by mass of said base component,
- said sheet consisting of said conductive elastomer material has a volume resistivity of 106 to 1010 Ω·cm and a variation in an in-plane volume resistivity thereof within 101 Ω·cm,
- in a flexing test conducted at a load of ½ lb, a flexing angle of 135 degrees, and a flexing speed of 175 cpm to examine a flexing resistance of said sheet, a number of flexed times is not less than 30,000 before said sheet is broken.
The conductive seamless belt according to claim 1, wherein said polyester thermoplastic elastomer is a copolymer composed of a hard segment consisting of polyester having aromatic rings and a soft segment consisting of polyether and/or polyester.
Dependencies are inferred from the claim text.