Patent ID: 6946031

Claim:
A rod for a coating device, used when a continuously-running body to be coated is coated with a coating solution, the rod comprising: a columnar base material; and an abrasion-resistant coating formed on a circumferential surface of base the material, the coating including at least one layer, wherein when a friction coefficient between a topmost layer of the coating and the body to be coated is represented by μ, a Vickers hardness of the coating is represented by Hv, a thermal expansion coefficient of the base material is represented by α 1 ×10 −6 /° C., a thermal expansion coefficient of the coating is represented by α 2 ×10 −6 /° C., a film thickness of the coating is represented by t μm, μ and Hv satisfy a predetermined relational expression, and/or α 1 , α 2 and t satisfy another predetermined relational expression, wherein μ and Hv satisfy a relationship expression of Hv>1500×μ 2 +1200; and wherein α 1 , α 2 and t satisfy a relational expression of |α 1 −α 2 |<3/(t−4)+7 if t is larger than 4.