Manufacture of Hand Sanitizers to Fight COVID-19
Hand sanitizers are liquids, gels or foams used to eliminate bacteria and viruses, etc.
Formulations vary widely. A number of active ingredients are used, for example benzalkonium chloride, however, the most effective sanitizing products are based on alcohol, usually isopropyl or ethyl alcohol. Typically the alcohol content is between 60 and 95%. The alcohol is usually blended with an aqueous dispersion of carbomers such as Carbopol to provide the gelling effect, although some products are lower viscosity for use in foam dispensers.
The remaining ingredients include moisturizers and fragrance and occasionally coloring may also be added.
Here is the recipe for hand sanitizer from the World Health Organization
One of the key steps in the manufacturing process is preparation of the gel. Obtaining an agglomerate-free dispersion is essential to ensure a clear, bright gel after neutralization.
Some formulations include surfactants and moisturizers such as glycerine to protect the skin and prevent drying out the skin. These may make up a small proportion of the overall formulation so the mixing system must be capable of dispersing them uniformly throughout the product.
Several solutions are available depending on volumes required, the nature of ingredients, viscosity, work ergonomics and more.
For applications where ingredients are relatively easy to mix such as liquid ingredients, jetequip has configured a tote mixer ideal for mixing hand sanitizers. It is an economical, very efficient solution and no mounting structure is required. It is a one drive unit which can be used with multiple agitator segments, utilizing Dynamic Coupling technology.
If aeration must be minimized, if powders are difficult to incorporate or to hydrate, if mixing time must be reduced, then the high shear action of a mixer can overcome these problems, resulting in an agglomerate free solution, eliminating aeration and shortened mixing time.
This solution is available in two versions:
Batch (by immersion in a tank)
For an ergonomic solution that allows you to work efficiently, we also offer incorporation systems. These systems can be used in recirculation with a tank or in continuous if batch sizes are large.