Scorching of rubber seals
is a kind of advanced vulcanization behavior, that is, the early vulcanization phenomenon that occurs in various processes before vulcanization (rubber mixing, rubber storage, extrusion, calendering, molding), so it can also be called early vulcanization. Scorching of rubber is a kind of advanced vulcanization behavior, that is, the early vulcanization phenomenon that occurs in various processes before vulcanization (rubber mixing, rubber storage, extrusion, calendering, molding), so it can also be called early vulcanization. Causes of scorch phenomenon: (1) Improper formula design, unbalanced configuration of vulcanization system, and excessive amount of vulcanizing agent and accelerator. (2) For some types of rubber that need to be masticated, the mastication does not meet the requirements, the plasticity is too low, and the colloid is too hard, resulting in a sharp temperature rise during rubber mixing. The roll temperature of the rubber mixer or other roller devices (such as remixers, calenders) is too high and the cooling is not enough, which may also lead to scorch on site. (3) When the compound rubber is unloaded, the film is too thick, the heat dissipation is poor, or it is not cooled, that is, it is stored in a hurry, coupled with factors such as poor ventilation in the warehouse and high temperature, which will cause heat accumulation, which will also cause scorch. (4) Poor management during the storage process of the rubber material. After the remaining scorch time is used up, it is still stacked and unused, resulting in natural scorch. Hazards of scorch: difficult to process; affect the physical properties of the product and the smoothness of the outer surface; even lead to disconnection at the joint of the product. Methods to prevent scorch: (1) The design of the rubber compound should be appropriate and reasonable. For example, the accelerator should be used in multiple ways as much as possible. Scorch is suppressed. In order to adapt to the high temperature, high pressure and high speed rubber mixing process, an appropriate amount (0.3 to 0.5 parts) of anti-scorch agent can also be used in the formula. (2) Strengthen the cooling measures for rubber materials in rubber mixing and subsequent processes, mainly by strictly controlling machine temperature, roll temperature and ensuring sufficient cooling water circulation, so that the operating temperature does not exceed the critical point of scorch. (3) Pay attention to the management of semi-finished rubber materials, each batch of materials should be followed by a flow card, and implement“first in first out”The principle of inventory, and stipulates that the maximum storage time of each vehicle material shall not be exceeded. The warehouse should have good ventilation conditions. Company website: https://www.orksealing.com/
rubber seals has become a standardized way of dealing with custom rubber seals.
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In various different types of custom rubber seals, custom rubber seals rubber seals is one of the most commonly used.