Shoe press belt
A shoe press belt includes a polyurethane in which a reinforcement base member is embedded, the polyurethane being in one piece with the reinforcement base member. The polyurethane constituting at least an outer circumferential surface of the shoe press belt includes, as an urethane prepolymer component, an aliphatic polycarbonatediol component and an aromatic diisocyanate component, and includes, as a curing agent component, an aliphatic diol component having a carbon number of less than or equal to 6 and an aromatic diol component having two hydroxyethoxy groups. A content of the aromatic diol component with respect to the aliphatic diol component and the aromatic diol component is more than or equal to 10 mass % and less than or equal to 50 mass %. Accordingly, there is provided a shoe press belt suppressed in generation and development of a crack.
1. A shoe press belt comprising a thermosetting polyurethane in which a reinforcement base member is embedded, the thermosetting polyurethane being in one piece with the reinforcement base member, wherein
the thermosetting polyurethane constituting at least an outer circumferential surface of the shoe press belt includes, as an urethane prepolymer component, an aliphatic polycarbonatediol component and an aromatic diisocyanate component, and includes, as a curing agent component, an aliphatic diol component having a carbon number of less than or equal to 6 and an aromatic diol component having two hydroxyethoxy groups, and
a content of the aromatic diol component with respect to the aliphatic diol component and the aromatic diol component is more than or equal to 10 mass% and less than or equal to 50 mass %.
2. The shoe press belt according to claim 1 , wherein the aromatic diol component is at least one of a 1,3-bis(2-hydroxyethoxy)benzene component and a 1,4-bis(2-hydroxyethoxy)benzene component.
3. The shoe press belt according to claim 1 , wherein the aliphatic diol component is a 1,4-butanediol component.
4. The shoe press belt according to claim 1 , wherein the aliphatic polycarbonatediol component includes a 1,5-pentanediol component, a 1,6-hexanediol component, and a carbonate component.
5. The shoe press belt according to claim 1 , wherein the aromatic diisocyanate component is a diphenylmethane diisocyanate component.