Creams & Lotions
Facial creams contain moisturizers that, for example, restore moisture to dry skin. Examples of these hydrating substances are glycerol and hyaluronic acid. There are also fatty substances in it that soften and nourish your skin.
We understand mixing is not just about simply combining raw ingredients
What are Creams & Lotions?
Some ingredients of these are shea butter or various oils derived from flowers and plants. It is very nice for your skin if cream has the same ph value as your skin. To promote this, there are acidity regulators in cream, such as sodium hydroxide. Preservatives in face cream ensure that the cream has a longer shelf life. Day creams and anti-wrinkle creams often contain UV filters to protect you from the sun. These filters reduce the chance of damaged skin and, in most cases, prevent the development of wrinkles. Some skin creams contain dyes, these dyes make you get a certain color on your skin like tanning creams. Lastly, there are many creams that have different fragrances, these fragrances besides keeping your skin healthy also make it smell good.
Applications
How are creams & lotions made?
Creams can come from an oil-in-water or water-in-oil emulsion. These oils come from emollients that also make the body cream spreadable. Next, perfume, color and preservatives are added to the oil. Depending on the type of cream, additional products are always added. For example, extra essential oil is good for sensitive skin and there are various substances that ensure younger/smooth skin.
Depending on the raw materials and the desired properties of the final product, the active ingredients are dispersed in both stages. A typical manufacturing process looks as follows:
Flakes/powdered ingredients, such as cetyl alcohol and stearic acid, sometimes mixed dry beforehand, are dispersed in the oil phase. The melting of some ingredients may require heating, the temperature for melting these ingredients range between 45-85 degrees. This does depend on the formulation and viscosity. After all these ingredients and substances are added together, it is mixed until the final product is homogeneous.
Pharma & Personal Care – Contacts
Tom Pruymboom
Sales Director
Area Worldwide
Bart Brouwer
Area Sales Manager
Area Worldwide
Sijko van der Veen
Application Engineer
Technical Specialist
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Although each manufacturer have their own special ways of producing cream and lotions, the process can roughly be divided into two steps:
- Mixing/emulsifying
- storage
Mixing
The basic product for creams & lotions is generally prepared in premix tanks. The viscosity of the mixture runs from 1-50.000 cP, or even higher.
The general purpose can be split in two;
To mix/dissolve several (difficult to dissolve) powders like thickeners (carbopol, gums etc.) and liquids into a lump free solution. For this Jongia’s “Dual mixing system”, with rotor/stator, supported by a turbine agitator is an excellent choice. The powerful mixing capabilities of the rotor/stator create high shear, necessary to realize the shortest possible time. The turbine agitator is designed for increasing viscosities, to support the rotor/stator during the mixing process.
Mixing/Emulsifing
of a water phase and an oil based liquid, to get a high viscous and stable emulsion. For this Jongia’s ”anchor/high shear” mixing system is an excellent choice. The high shear mixer is used for emulsification of the liquid. In some cases supported by an external system (an in-line high shear mixer for example).
The anchor stirrer provides the overall homogeneity in the vessel, without damaging the product and/or process.
Storage
Several ingredients need to be kept homogeneous in storage tanks depending on the type of product produced. These in general sensitive (and higher viscous) products requires gentle treatment, low energy input and a minimum of air intake (air may cause problems during filling).
The top entry agitator type LD is fit for this step of the production process.
References:
Unilever, Beiersdorf, Suominen Codi, Americol
