BÖNNIGHEIM Microcapsules, from textiles to skin

08 May '08

3 min read

With regard to washfastness, microcapsules with a small diameter (<10 µm) and a melamine or chitosan casing, combined with the appropriate binder system, proved to be the best for applying to textiles.

The results of the study showed that the way the microcapsules bind to the fibres could be further improved by optimising the binder systems that are available on the market, without jeopardising the functioning of the encapsulated depot structures.

The release of substances and their transfer on to the skin was investigated by the Hohenstein scientists by using chitosan microcapsules filled with Vitamin E.

The results of the research show that cosmetic substances are released in sufficient quantities from the depot structures in the textile on to the skin and that this is therefore a possible new approach to skincare.

Equally promising were new developments in the encapsulation of biological substances, e.g. those to promote more rapid wound healing.

However, for therapeutic applications in medicine, the microcapsules still require further refinement in terms of controlling the dose when releasing the substance.

In their concluding research report, the Hohenstein specialists recommend that manufacturers should state that microcapsules are being used and what type of ingredient they contain, in the interests of consumer protection and the Cosmetics Directive 76/768 EEC.

The microcapsules and their casingmaterial must also be verified as biologically safe in accordance with EN ISO 10993.

Hohenstein Institutes

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