Microencapsulation concept

Posted: 2014-03-28

Microencapsulation concept

In recent years, textile materials with special applications in the cosmetic field have been developed. A new sector of cosmetic textiles is opened up and several cosmetic textiles products are currently available in the market. Microencapsulation technology is an effective technique to control the release properties of active ingredients that prolong the functionality of cosmetic textiles. This study discusses the development of cosmetic textiles and addresses microencapsulation technology with respect to its historical background, significant advantages, microencapsulation methods and recent applications in the textile industry. Gelatin microcapsules containing vitamin C were prepared using emulsion hardening technique. Both the optical microscopy and scanning electron microscopy demonstrated that the newly developed microcapsules were in the form of core-shell spheres with relatively smooth surface. The particle size of microcapsules ranged from 5.0 to 44.1 µm with the average particle size being 24.6 µm. The gelatin microcapsules were proved to be non-cytotoxic based on the research findings of the toxicity studies conducted on human liver and breast cell lines as well as primary bone marrow culture obtained from patient with non-malignant haematological disorder. The gelatin microcapsules were successfully grafted into textile materials for the development of cosmetic textiles.

                                                                                           

 

Microencapsulation is a process where tiny particles or droplets of an active substance are covered by an even coating to create small capsules; typically these will be of a particle size of 1 – 7µm. Microencapsulation has historically been used in many industries, such as the food industry for flavourings and the pharmaceutical industry for slow release narcotics. More recently this same technology has been employed for textile end uses to provide products improved wash durability and safety over traditional emulsion type products. It allows finishes on textiles to apply cosmetic grade products onto the skin such as vitamins or moisturising agents. 

Different types of capsule wall design are used to produce specific release rates of the encapsulated products, including slow capsule decay to allow gradual release of fragrances or insecticides over a period of time, heat/pressure release where friction causes activation and also durable on non-release types (colour change etc). 

Our microencapsulated products give typically 20 – 30 wash durability at 40°C using appropriate binders, and can be by applied in a variety of methods; padding, garment washing, printing, spray or coating. In many cases they can also be used for non-textiles such as plastics, ceramics, inks etc. and we can provide some in Masterbatch form, as well as powders along with the more traditional slurry.