Mucell technology developed by Trexcel of USA about 4 years ago and widely exhibited in the K 2001 fair, is growing in the major continents. The process originally started with Polyolefins and has now extended to Styrenics, PVC and a host of ETPS, as well as to the various processes like injection moulding, blow moulding and extrusion.

"MuCell" is the trade name of microcellular polymeric foam produced by Trexel's proprietary MuCell microcellular foam process. The MuCell process uses supercritical fluids (SCFs) of atmospheric gases, not chemical blowing agents or hydrocarbon-based physical blowing agents, to create evenly distributed and uniformly sized microscopic cells throughout a thermoplastic polymer. Average cell sizes range from 5-50 microns in diameter, and density reductions in the range of 10-95% can be achieved. Because the cell sizes in MuCell material are microscopic, (scanning electron microscope (SEM) pictures are required to study the structure of these materials) the materials appear solid to the human eye.

Trexel is licensing the MuCell microcellular foam process currently to major polymer converters in Asia, Europe and North America for extrusion, injection molding (including structural foam), and blow molding applications. The current emphasis includes polypropylene (PP) and polystyrene (PS) sheet and rigid polyvinyl chloride (PVC) in extrusion applications; nylons, polycarbonate/acrylonitrile butadiene styrene (PC/ABS), and high-temperature engineering resins (polyarylsulfones), as well as polypropylene (PP) and thermoplastic elastomers (TPEs) in injection molding applications and HDPE bottles in blow molding applications.