MuCell技术许可证获得者之一的Engel公司现已开始出售16种MuCell设备，其规格尺寸从150~1000吨。 MuCell是一种在Massachusets技术研究所开发的工艺，在这种工艺中，超临界氮或二氧化碳作为一种发泡剂被注入桶里，并产生许多极微小的（5~50微米）尺寸均匀的孔眼。这些孔眼尺寸 Engel, one of MuCell’s technology licensees, is now selling 16 MuCell devices in sizes from 150 to 1,000 tons. MuCell is a process developed at the Massachusetts Institute of Technology where supercritical nitrogen or carbon dioxide is injected as a blowing agent into the barrel and produces many tiny (5 to 50 microns) uniform sizes Eyelets. These eyelet sizes