How to solve the problem of liquid silicone coagulation?
Liquid silicone coagulation may be caused by a variety of reasons. Here are some possible solutions:
1. Check whether it is expired:
Liquid silicone has a shelf life. After expiration, it may coagulate into blocks due to increased viscosity.
If the silicone has expired, you should consider replacing it with a new liquid silicone.
2. Restore fluidity:
For liquid silicone that has not expired, if it coagulates due to improper storage conditions (such as too low or too high temperature), you can try to restore its fluidity.
You can use expansion bolts to make a stirring head and stick it on the electric drill to stir the silicone. This method reduces the viscosity of the silicone and restores its fluidity through physical stirring.
Heat and bubbles will be generated during the stirring process, so after stirring, the silicone should be cooled and left to stand for a while, and then used after the bubbles dissipate.
3. Adjust the amount of coagulant:
When making liquid silicone mold crafts, the amount of coagulant used will affect the coagulation time and coagulation effect of the silicone.
If the amount of coagulant is too much, the silicone may coagulate too quickly and clump. At this time, the amount of coagulant should be appropriately reduced.
At the same time, temperature will also affect the effect of the coagulant. At lower temperatures, the coagulation time will be extended; at higher temperatures, the coagulation time will be shortened. Therefore, the amount of coagulant should be adjusted according to the ambient temperature.
4. Avoid contamination and improper operation:
Liquid silicone should be fully mixed before vulcanization molding to avoid unmixed gel particles in the rubber.
Clean the mold and injection pipe to ensure that there are no grease pollutants. Grease pollutants will destroy the vulcanization structure of liquid silicone, resulting in incomplete curing or agglomeration.
Wear finger cots or gloves during operation to avoid sweat and grease on the hands from contaminating the silicone.
5. Storage and transportation precautions:
Liquid silicone should avoid high and low temperature environments during storage and transportation to prevent silicone from deteriorating or condensing.
Refrigerated storage of rubber should be left at room temperature for a period of time before use to avoid condensation problems caused by temperature differences.
In summary, solving the problem of liquid silicone condensation into agglomerates requires multiple aspects, including checking the shelf life, restoring fluidity, adjusting the amount of coagulant, avoiding contamination and improper operation, and paying attention to storage and transportation conditions. If the problem still cannot be solved, it is recommended to consult a professional silicone material supplier or manufacturer for more specific help and suggestions.