Why the rubber material will produce scorching?

Rubber burning reasons are summarized as follows: formula design is unreasonable, such as vulcanizing agent, accelerator dosage is too much; loaded rubber capacity is too large, improper refining operations, such as refining machine temperature is too high, the next piece of the piece is not sufficiently cooled, too early to add sulfur or dispersion of uneven, resulting in a high degree of concentration of vulcanizing agent and accelerant; without the thin through the heat dissipation of the volume of the roll stored, rolled too large or stored for too long a period of time, etc., will cause the rubber to burn. cause the rubber material burnt.