How to reduce the viscosity of the silicone tube surface?
Silicone tube is made by adding raw silicone rubber to a twin-roll rubber mixer or a closed kneader, gradually adding silica and other additives, and repeatedly refining it evenly. The extruded products will stick together after being put together for a long time. The silicone tube extruded by peroxide vulcanization will stick together after being stored for a long time after the secondary vulcanization. What is the reason? ? Is there any solution? Seeing that the surface of the tube extruded by the same company is frosted and foggy, is it enough to reduce the surface viscosity of the extruded silicone tube?


1. After the silicone tube is extruded, add a release agent before secondary vulcanization.


Second, the sandblasting of the surface of the silicone tube should be related to the extrusion mouth shape.


3. The main reason is the ratio of silane coupling agent, hydroxy silicone oil, zinc stearate and vulcanizing agent in the mixing silica gel. It is necessary to specifically design the mixing silica gel material ratio and the mixing process.


4. What if the viscosity of silica gel is too high? You can adjust the formula in the next production, add more base material 107 and silicone oil as appropriate. Or add less meteorological silicon without changing the base material and silicone oil. The specific situation depends on the performance of the glue required. At the same time Pay attention to the yield value of calcium powder in future production. Sometimes too high moisture content will also affect the viscosity.