Silica Gel is effective in adsorbing moisture and water vapour due to its non-reactive and odourless features. It allows control of the relative humidity in a packed environment. The desiccants can adsorb up to 40% of its weight and bring the humidity in the packaging down to 40%.
Types of Silica gels
Non-indicating, Orange-indicating, and Blue-indicating Silica gels are the common types of moisture absorbers available.
Indicating silica gel desiccant acts as a moisture indicator that will show a colour change when it starts reaching its full adsorption capacity alerting users for the replacement of the desiccant. The blue Cobalt Chloride desiccants will turn pink when saturated while the orange methyl violet desiccants will turn from orange to green.
Another alternative for an indication for a replacement would be the weight of the desiccants or with a humidity indicator card.
Benefits of using Silica gel
Silica gel desiccants absorb moisture faster then desiccant clay at higher humidity levels. Made up of highly porous silicon dioxide it binds water molecules on to its interior surfaces and keeping it dry even after it is saturated. The silica gel desiccant is a mineral which is processed and purified into a granular or beaded form.
The moisture absorbers often packed into desiccant bags to help eliminate both humidity and moisture from the air creating a dry and moisture-free environment for product packagings in industries such as electronics, food, automotive and healthcare.
Humi Pak desiccants are controlled and closely monitored with our in house laboratory daily to ensure high-quality grade desiccants supply with high dust attrition resistance.