First, resolve the resorcinol with a small amount of water, and then dilute to the specified concentration with water. Then, formaldehyde is added and a sodium hydroxide solution is added under slow stirring to control the pH between 8 and 10, which is the phenolic resin mother liquor. Thereafter, the phenolic mother liquor and the …
The fiber textile is subjected to dipping treatment before calendering. The fabric is passed through a special latex impregnating solution, and after a certain period of contact, the glue penetrates into the structure and adheres to the textile fabric, thereby reducing the dynamic fatigue property of the textile and the bonding strength with the rubber …
The moisture content of fiber textiles is generally high, such as cotton fabrics up to 7%; rayon is about 12%; nylon and polyester fabrics have lower moisture content, also more than 3%. However, the moisture content requirement of the textile in the rubber calendering process is generally controlled below 1%, otherwise the bonding strength between …
Neoprene is temperature sensitive and has a low roll temperature control range of between 35 and 45 °C. No need for refining, direct feeding after roughing, in order to prevent scorch, full-chloroprene rubber calendering rubber hot conditions. The hot-melt rubber is continuously fed by a special open mill to the calender. The speed of the …
Preparations that must be completed before calendering include: hot-melting and rubber-feeding of rubber materials, dipping and drying of textiles, and heat-stretching of chemical fiber cords. These processes can be carried out independently or in combination with the calendering process. Rubber material heating and rubber supply After long-term parking, the rubber compound has lost its thermoplastic …
