PureTemp PCMs are available in three forms: unencapsulated, microencapsulated and macroencapsulated. Each form is suited to particular applications. The proper containment option depends on many factors. Entropy Solutions experts and encapsulation partners work with each customer to determine the optimal containment choice.
Unencapsulated: Phase change material sold in bulk is known as unencapsulated PCM. The material is solid in ambient temperatures below its melting point and liquid in ambient temperatures above its melting point. Unencapsulated PCMs must be contained in some form – micro- or macroencapsulation – before they can be incorporated in a product.
► To order unencapsulated PureTemp in bulk or request a sample, visit www.puretemp.com/contact.
Microencapsulated: The process of coating small amounts of phase change material, from 10 to 1000 microns, is called microencapsulation. The three basic forms:
Powder: Particles of PCM are encased within a shell and immersed in a water solution. The water is then removed, leaving a powder of encapsulated PCM.
Cake: Particles of PCM are encased within a shell and then immersed in a water solution. Most of the water is removed, leaving a cake that is 30% water and 70% solids.
Slurry: Particles of PCM are encased within a shell and then immersed in a water solution. Some water is removed, leaving a slurry that is about 60% water and 40% solids.
Microencapsulated PCMs are sold to manufacturers for use in high-performance textiles, adhesives, bedding, flooring, paint, roofing and electronics.
► Contact one of our containment partners, Encapsys or Microtek Laboratories, for information on microencapsulated PureTemp.
Macroencapsulated: Phase change material contained in flexible films or plastic vessels of various size, shapes or formats is referred to as macroencapsulated PCM. Also known as bulk containment. Macroencapsulated PCMs are sold to manufacturers for use in cooling vests, car seats, warming blankets, electronics and thermal energy storage.
► PureTemp phase change material is available in macroencapsulated form. See our Vesl products page for details.