Comfort Temperature Micro PCM Phase Change Material For Apparel
1. About Phase Change Material
Phase Change Materials (PCMs) are ideal products for thermal
management solutions. This is because they store and release
thermal energy during the process of melting & freezing
(changing from one phase to another). When such a material freezes,
it releases large amounts of energy in the form of latent heat of
fusion, or energy of crystallisation. Conversely, when the material
is melted, an equal amount of energy is absorbed from the immediate
environment as it changes from solid to liquid.
This property of PCMs can be used in a number of ways, such as
thermal energy storage whereby heat or coolness can be stored from
one process or period in time, and used at a later date or
different location, for example in solar energy building. PCMs are
also very useful in providing thermal barriers or insulation, for
example in temperature controlled transport. PCM can also be
incorporated in thermal regulation textiles to control temperature
2. About microencapsulation
Microencapsulation may be defined as the process of surrounding or
enveloping one substance within another substance on a very small
scale, yielding capsules ranging from less than one micron to
several hundred microns in size. Microcapsules may be spherically
shaped, with a continuous wall surrounding the core, while others
are asymmetrically and variably shaped, with a quantity of smaller
droplets of core material embedded throughout the microcapsule.
There are almost limitless applications for microencapsulated
materials.One application increasingly utilized is the
incorporation of microencapsulated phase change materials (PCMs).
Phase change materials absorb and release heat in response to
changes in environmental temperatures. When temperatures rise, the
phase change material melts, absorbing excess heat, and feels cool.
Conversely, as temperatures fall, the PCM releases heat as it
solidifies, and feels warm. This property of microencapsulated
phase change materials can be harnessed to increase the comfort
level for users of sports equipment, military gear, bedding,
clothing, building materials, and many other consumer products.