Semi-conductive roll
View Patent ↗A semi-conductive roll is provided including a shaft, a low-hardness base layer formed on an outer circumferential surface of the shaft, and a coating layer formed by coating the low-hardness base layer radially outwardly. The coating layer includes one of a rubber material and an elastomer material that is crosslinked by at least one resin crosslinking agent.
1. A semi-conductive roll comprising a shaft, a low-hardness base layer formed on an outer circumferential surface of said shaft, and a coating layer formed by coating radially outwardly of said low-hardness base layer, said coating layer comprising one of a rubber material and an elastomer material that is crosslinked by at least one thermosetting resin crosslinking agent having one of an aromatic ring structure and a heterocyclic structure, said at least one thermosetting resin crosslinking agent comprising one of a phenol-formaldehyde resin of a resol type and a xylene-formaldehyde resin of a resol type.
2. The semi-conductive roll according to claim 1 , wherein said at least one thermosetting resin crosslinking agent is included in an amount of 1-60 parts by weight per 100 parts by weight of a total amount of said thermosetting resin crosslinking agent and said at least one of said rubber material and said elastomer material.
3. The semi-conductive roll according to claim 1 , wherein said at least one thermosetting resin crosslinking agent is included in an amount of 10-50 parts by weight per 100 parts by weight of a total amount of said thermosetting resin crosslinking agent and said at least one of said rubber material and said elastomer material.
4. The semi-conductive roll according to claim 1 , wherein said rubber material is an acrylonitrile-butadiene rubber having an acrylonitrile content of at least 30%.
5. The semi-conductive roll according to claim 1 , wherein said coating layer has a volume resistivity in a range of 1×10 3 −1×10 12 Ω·cm.
6. The semi-conductive roll according to claim 1 , wherein said coating layer has a thickness in a range of 1-200 μm.
7. The semi-conductive roll according to claim 1 , wherein said low-hardness base layer comprises a solid elastic body.
8. The semi-conductive roll according to claim 1 , wherein said low-hardness base layer comprises a foamed elastic body.
9. The semi-conductive roll according to claim 1 , wherein said low-hardness base layer has JJS-A hardness in a range of 5°-50°.
10. The semi-conductive roll according to claim 1 , wherein said low-hardness base layer comprises at least one electrically conductive agent such that said low-hardness base layer exhibits electrical conductivity.