Processes for manufacture of a press jacket

A process for manufacturing a press jacket in an apparatus that includes a cylindrical casting mold having an exterior surface, said process comprising:

• setting a temperature of the cylindrical casting mold which is colder than an elastomeric material being cast;
• casting a hollow cylindrical sleeve from the elastomeric material on the casting mold, the elastomeric material containing at least one crystallization component, the hollow cylindrical sleeve including an internal surface which is formed against the external surface of the cylindrical casting mold;
• and
• embedding at least one of reinforcement threads and reinforcement fabric in the elastomeric material;
• whereby the internal surface of the hollow cylindrical sleeve is harder than an external surface of the hollow cylindrical sleeve.

A process for manufacturing a press jacket in an apparatus that includes a cylindrical casting mold having an external surface, said process comprising:

• setting a temperature of the cylindrical casting mold which is colder than an elastomeric material being cast;
• and
• casting a hollow cylindrical sleeve from the elastomeric material on the casting mold, the elastomeric material containing at least one crystallization component, the hollow cylindrical sleeve including an internal surface which is formed against the external surface of the cylindrical casting mold;
• wherein said internal surface of said hollow cylindrical sleeve is harder than an external surface of said hollow cylindrical sleeve.

A process for manufacturing a press jacket in an apparatus that includes a cylindrical casting mold having at least one casting surface, said process comprising:

• setting a temperature of the cylindrical casting mold which is colder than an elastomeric material being cast, said cylindrical casting mold having a temperature which is maintained at a temperature approximately 20 to 80° C. colder than the elastomeric material being cast;
• casting a hollow cylindrical sleeve from the elastomeric material on the cylindrical casting mold, the elastomeric material containing a prepolymer, such that the hollow cylindrical sleeve is provided with an interior cylindrical surface and an exterior cylindrical surface, wherein one of said external surface and said internal surface is formed against said casting surface;
• creating greater crystallization in a sleeve surface which contacts said casting surface;
• wherein the greater crystallization corresponds to greater hardness in said sleeve surface relative to other portions of the elastomer material, the greater hardness being in the range of approximately 2 to 7 Shore A.