Effects on mixing
The absorption speed of rubber to oil is related to the composition, viscosity and mixing conditions of oil: generally low viscosity, high aromatic hydrocarbon content, high temperature, and fast absorption. However, the amount of oil is large, which makes the dispersibility of carbon black in rubber worse, so it must be added in batches. In addition, adding oil during mixing can reduce heat generation and energy consumption.
Effect on extrusion
Adding an appropriate amount of oil to the rubber compound can soften the rubber compound, the surface of the extruded semi-finished product is smooth, the extrusion expansion is small, and the extrusion speed is fast.
Effect on vulcanization
With the increase in the amount of oil filling in the rubber compound, the vulcanization rate tends to slow down. The addition of oil reduces the concentration of vulcanizing agent and accelerator in the rubber and slows down the vulcanization speed.
The operating oil containing a lot of aromatic hydrocarbon oil has the effect of promoting the scorch of the rubber compound and accelerating the vulcanization.
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