Liquid silicone caking may be caused by a variety of reasons. Here are some common reasons:
Contact with environmentally unfriendly substances:
When liquid silicone comes into contact with environmentally unfriendly substances, such as materials containing sulfur, tin, lead, amines, etc., it may be poisoned and not solidified. These substances may react chemically with liquid silicone, causing its structure to change and then form agglomerates.
Uneven mixing of AB components:
When using liquid silicone, it is usually necessary to mix its A and B components evenly in a certain proportion. If the mixing is uneven, it may cause the rubber to not solidify or incompletely solidify, and then form agglomerates.
Improper proportion of AB components:
In addition to mixing uniformity, the proportion of A and B components is also an important factor affecting the curing of liquid silicone. If the proportion of A or B components is too much or too little, it may cause the liquid silicone to not completely solidify and then form agglomerates.
Temperature influence:
Liquid silicone will remain in a liquid state when it is kept at a certain temperature (usually room temperature 20~30℃). When the temperature drops, liquid silicone may become more viscous or even solidify into a hard substance. If liquid silicone is stored or transported at low temperatures for a long time, it may clump due to the low temperature.
Improper storage conditions:
The storage conditions of liquid silicone have a great impact on its stability. If the storage environment is too humid, hot or exposed to direct sunlight, it may cause liquid silicone to deteriorate or clump.
Expiration of shelf life:
Liquid silicone usually has a long shelf life, but if it is left for too long, the liquid in the ingredients may evaporate and dissipate, causing the silicone to become harder and then caking.
To avoid liquid silicone caking, the following measures can be taken:
Ensure that the substances that liquid silicone contacts are environmentally friendly and avoid contact with harmful materials such as sulfur, tin, lead, and amines.
When using liquid silicone, mix components A and B strictly in proportion and ensure that they are mixed evenly.
Control the temperature and humidity of the storage environment to avoid direct sunlight and high temperature environments.
Check the shelf life of liquid silicone regularly and use it within the validity period.
In summary, liquid silicone caking may be caused by a variety of reasons, which need to be paid attention to and prevented during use and storage.