Differences between the many types of micro-capsules
Micro-capsules are increasingly used in personal care formulations for visual and other benefits. With a growing number of variants now available for formulators to choose from, it becomes more difficult to choose the right material for each application need, and to assess the differences between the many types now available.
What are the benefits of using micro-capsules? This is not the only question that comes up in this context. It is also important to know what types are available, in what way they differ, what needs to be known for formulating and processing, what to look for when selecting micro-capsules and what are some examples of the many varieties now available.
Benefits of using micro-capsules
Different micro-capsules can be used for different effects within products. Their uses are wide and varied, such as
visual effects:
- dynamic visual effects through the packaging due to coloured micro-capsules
- impression of delivery of an internal substance for a significant impact on the consumer – whether this be an active ingredient, fragrance or colour to the end-product
protection:
- using micro-capsules to protect an internal active core can be a great way of incorporating usually unstable or incompatible materials into a base product and ensuring you achieve a good bio-availability throughout its shelf life
exfoliation/cleansing:
- micro-capsules can give the visual impression of exfoliation while other ingredients in the formula provide chemical exfoliation
improve skin feel:
- encapsulating UV filters, colourants or other texturally challenged materials to improve their skin feel and dispersion in a formulation
fragrance release:
- providing a burst of aroma when dispensed or applied
novel delivery:
- micro-capsules can be a great way of drawing attention to an active ingredient visually, and potentially also enhanced delivery on application. Either way, micro-capsules will achieve enhanced perceived efficacy of a product to a consumer
manipulated residue:
- in many cases, no residual ‘shell’ is desirable once the internal contents have been delivered, but sometimes, a residual shimmer or colour effect may be desired from the use of micro-capsules – different materials can provide either of these effects as considered desirable by the developer.
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